15241916852

Committed 25 May 2025 08:59PM UTC coverage: 47.908% (-2.8%) from 50.743%

Build # 15241916852

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push

github

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tueda

Commit Message

ci: build arm64-windows binaries

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46.6

/sources/pre.c

/** @file pre.c
 *
 *  This is the preprocessor and all its routines.
 */
/* #[ License : */
/*
 *   Copyright (C) 1984-2023 J.A.M. Vermaseren
 *   When using this file you are requested to refer to the publication
 *   J.A.M.Vermaseren "New features of FORM" math-ph/0010025
 *   This is considered a matter of courtesy as the development was paid
 *   for by FOM the Dutch physics granting agency and we would like to
 *   be able to track its scientific use to convince FOM of its value
 *   for the community.
 *
 *   This file is part of FORM.
 *
 *   FORM is free software: you can redistribute it and/or modify it under the
 *   terms of the GNU General Public License as published by the Free Software
 *   Foundation, either version 3 of the License, or (at your option) any later
 *   version.
 *
 *   FORM is distributed in the hope that it will be useful, but WITHOUT ANY
 *   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 *   FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 *   details.
 *
 *   You should have received a copy of the GNU General Public License along
 *   with FORM.  If not, see <http://www.gnu.org/licenses/>.
 */
/* #] License : */ 
/*
          #[ Includes :
*/
#include "form3.h"

static UBYTE pushbackchar = 0;
static int oldmode = 0;
static int stopdelay = 0;
static STREAM *oldstream = 0;
static UBYTE underscore[2] = {'_',0};
static PREVAR *ThePreVar = 0;

static KEYWORD precommands[] = {
         {"add"          , DoPreAdd       , 0, 0}
        ,{"addseparator" , DoPreAddSeparator,0,0}
        ,{"append"       , DoPreAppend    , 0, 0}
        ,{"appendpath"   , DoPreAppendPath, 0, 0}
        ,{"assign"       , DoPreAssign    , 0, 0}
        ,{"break"        , DoPreBreak     , 0, 0}
        ,{"breakdo"      , DoBreakDo      , 0, 0}
        ,{"call"         , DoCall         , 0, 0}
        ,{"case"         , DoPreCase      , 0, 0}
        ,{"clearflag"    , DoClearUserFlag, 0, 0}
        ,{"clearoptimize", DoClearOptimize, 0, 0}
        ,{"close"        , DoPreClose     , 0, 0}
        ,{"closedictionary", DoPreCloseDictionary,0,0}
        ,{"commentchar"  , DoCommentChar  , 0, 0}
        ,{"continuedo"  ,  DoContinueDo   , 0, 0}
        ,{"create"       , DoPreCreate    , 0, 0}
        ,{"debug"        , DoDebug        , 0, 0}
        ,{"default"      , DoPreDefault   , 0, 0}
        ,{"define"       , DoDefine       , 0, 0}
        ,{"do"           , DoDo           , 0, 0}
        ,{"else"         , DoElse         , 0, 0}
        ,{"elseif"       , DoElseif       , 0, 0}
        ,{"enddo"        , DoEnddo        , 0, 0}
#ifdef WITHFLOAT
    ,{"endfloat"     , DoEndFloat     , 0, 0}
#endif
        ,{"endif"        , DoEndif        , 0, 0}
        ,{"endinside"    , DoEndInside    , 0, 0}
        ,{"endnamespace" , DoEndNamespace , 0, 0}
        ,{"endprocedure" , DoEndprocedure , 0, 0}
        ,{"endswitch"    , DoPreEndSwitch , 0, 0}
        ,{"exchange"     , DoPreExchange  , 0, 0}
        ,{"external"     , DoExternal     , 0, 0}
        ,{"factdollar"   , DoFactDollar   , 0, 0}
        ,{"fromexternal" , DoFromExternal , 0, 0}
        ,{"if"           , DoIf           , 0, 0}
        ,{"ifdef"        , DoIfydef       , 0, 0}
        ,{"ifndef"       , DoIfndef       , 0, 0}
        ,{"include"      , DoInclude      , 0, 0}
        ,{"inside"       , DoInside       , 0, 0}
        ,{"message"      , DoMessage      , 0, 0}
        ,{"namespace"    , DoNamespace    , 0, 0}
        ,{"opendictionary", DoPreOpenDictionary,0,0}
        ,{"optimize"     , DoOptimize     , 0, 0}
        ,{"pipe"         , DoPipe         , 0, 0}
        ,{"preout"       , DoPreOut       , 0, 0}
        ,{"prependpath"  , DoPrePrependPath,0, 0}
        ,{"printtimes"   , DoPrePrintTimes, 0, 0}
        ,{"procedure"    , DoProcedure    , 0, 0}
        ,{"procedureextension" , DoPrcExtension   , 0, 0}
        ,{"prompt"       , DoPrompt       , 0, 0}
        ,{"redefine"     , DoRedefine     , 0, 0}
        ,{"remove"       , DoPreRemove    , 0, 0}
        ,{"reset"        , DoPreReset     , 0, 0}
        ,{"reverseinclude"   , DoReverseInclude   , 0, 0}
        ,{"rmexternal"   , DoRmExternal   , 0, 0}
        ,{"rmseparator"  , DoPreRmSeparator,0, 0}
        ,{"setexternal"  , DoSetExternal  , 0, 0}
        ,{"setexternalattr"  , DoSetExternalAttr  , 0, 0}
        ,{"setflag"      , DoSetUserFlag  , 0, 0}
        ,{"setrandom"    , DoSetRandom    , 0, 0}
        ,{"show"         , DoPreShow      , 0, 0}
        ,{"skipextrasymbols" , DoSkipExtraSymbols , 0, 0}
        ,{"sortreallocate", DoPreSortReallocate , 0, 0}
#ifdef WITHFLOAT
    ,{"startfloat"   , DoStartFloat   , 0, 0}
#endif
        ,{"switch"       , DoPreSwitch    , 0, 0}
        ,{"system"       , DoSystem       , 0, 0}
        ,{"terminate"    , DoTerminate    , 0, 0}
        ,{"timeoutafter" , DoTimeOutAfter , 0, 0}
        ,{"toexternal"   , DoToExternal   , 0, 0}
        ,{"undefine"     , DoUndefine     , 0, 0}
        ,{"use"          , DoUse          , 0, 0}
        ,{"usedictionary", DoPreUseDictionary,0,0}
        ,{"write"        , DoPreWrite     , 0, 0}
};

/*
          #] Includes : 
         # [ PreProcessor :
                 #[ GetInput :

                Gets one input character. If we reach the end of a stream
                we pop to the previous stream and try again.
                If there are no more streams we let this be known.
*/

UBYTE GetInput(VOID)
{
        UBYTE c;
        while ( AC.CurrentStream ) {
                c = GetFromStream(AC.CurrentStream);
                if ( c != ENDOFSTREAM ) {
#ifdef WITHMPI
                        if ( PF.me == MASTER 
                                 && AC.NoShowInput <= 0
                                 && AC.CurrentStream->type != PREVARSTREAM )
#else
                        if ( AC.NoShowInput <= 0 && AC.CurrentStream->type != PREVARSTREAM )
#endif
                                CharOut(c);
                        return(c);
                }
                AC.CurrentStream = CloseStream(AC.CurrentStream);
                if ( stopdelay && AC.CurrentStream == oldstream ) {
                        stopdelay = 0; AP.AllowDelay = 1;
                }
        }
        return(ENDOFINPUT);
}

/*
                 #] GetInput : 
                 #[ ClearPushback :
*/

VOID ClearPushback(VOID)
{
        pushbackchar = 0;
}

/*
                 #] ClearPushback : 
                 #[ GetChar :

                Reads one character. If it encounters a quote it immediately
                takes the whole preprocessor variable and opens a stream
                for it and starts reading the stream.
                Note that we have to take special precautions for escaped quotes.
                That is why we remember the previous character. We allow the
                (dubious?) construction of ending a stream with a backslash and
                then using it to escape an object in the parent stream.
*/

UBYTE GetChar(int level)
{
        UBYTE namebuf[MAXPRENAMESIZE+2], c, *s, *t;
        static UBYTE lastchar, charinbuf = 0;
        int i, j, raiselow, olddelay;
        STREAM *stream;
        if ( level > 0 ) {
                lastchar = '`';
                goto higherlevel;
        }
        if ( pushbackchar ) { c = pushbackchar; pushbackchar = 0; return(c); }
        if ( charinbuf ) { c = charinbuf; charinbuf = 0; return(c); }
        c = GetInput();
        for(;;) {
                if ( c == '\\' ) {
                        charinbuf = GetInput();
                        if ( charinbuf != LINEFEED ) {
                                pushbackchar = charinbuf;
                                charinbuf = 0;
                                break;
                        }
                        charinbuf = 0;  /* Escaped linefeed -> skip leading blanks */
                        while ( ( c = GetInput() ) == ' ' || c == '\t' ) {}
                }
                else if ( c == '\'' || c == '`' ) {
                        if ( AP.DelayPrevar == 1 && c == '\'' ) {
                                AP.DelayPrevar = 0;
                                break;
                        }
                        lastchar = c;
higherlevel:
                        c = GetInput();
                        if ( c == '!' && lastchar == '`' ) {
                                if ( stopdelay == 0 ) oldstream = AC.CurrentStream;
                                AP.AllowDelay = 0;
                                stopdelay = 1;
                                c = GetInput();
                        }
                        if ( c == '~' && lastchar == '`' ) {
                                if ( AP.AllowDelay ) {
                                        pushbackchar = c;
                                        c = lastchar;
                                        AP.DelayPrevar = 1;
                                        break;
                                }
                        }
                        else {
                                pushbackchar = c;
                        }
                        olddelay = AP.DelayPrevar;
                        AP.DelayPrevar = 0;
                        i = 0; lastchar = 0;
                        for (;;) {
                                if ( pushbackchar ) { c = pushbackchar; pushbackchar = 0; }
                                else { c = GetInput(); }
                                if ( c == ENDOFINPUT || ( ( c == '\'' || c == LINEFEED )
                                && lastchar != '\\' ) ) {
                                        break;
                                }
                                if ( c == '{' ) { /* Try the preprocessor calculator */
                                        if ( PreCalc() == 0 ) Terminate(-1);
                                        c = GetInput();    /* This is either a { or a number */
                                        if ( c == '{' ) {
                                                MesPrint("@Illegal set inside preprocessor variable name");
                                                Terminate(-1);
                                        }
                                }
                                if ( c == '`' && lastchar != '\\' ) {
                                        c = GetChar(1);
                                        if ( c == ENDOFINPUT || ( ( c == '\'' || c == LINEFEED )
                                        && lastchar != '\\' ) ) {
                                                break;
                                        }
                                }
                                if ( lastchar == '\\' ) { i--; lastchar = 0; }
                                else lastchar = c;
                                namebuf[i++] = c;
                                if ( i > MAXPRENAMESIZE ) {
                                        namebuf[i] = 0;
                                        Error1("Preprocessor variable name too long: ",namebuf);
                                }
                        }
                        namebuf[i++] = 0;
                        if ( c != '\'' ) {
                                Error1("Unmatched quotes for preprocessor variable",namebuf);
                        }
                        AP.DelayPrevar = olddelay;
                        if ( namebuf[0] == '$' ) {
                                raiselow = PRENOACTION;
                                if ( AP.PreproFlag && *AP.preStart) {
                                        s = EndOfToken(AP.preStart);
                                        c = *s; *s = 0;
                                        if ( ( StrICmp(AP.preStart,(UBYTE *)"ifdef") == 0
                                        || StrICmp(AP.preStart,(UBYTE *)"ifndef") == 0 )
                                        && GetDollar(namebuf+1) < 0 ) {
                                                *s = c; c = ' ';
                                                break;
                                        }
                                        *s = c; 
                                }
                                else {
                                        s = EndOfToken(namebuf+1);
                                        if ( *s == '[' ) { while ( *s ) s++; }
                                }
                                if ( *s == '-' && s[1] == '-' && s[2] == 0 )
                                        raiselow = PRELOWERAFTER;
                                else if ( *s == '+' && s[1] == '+' && s[2] == 0 )
                                        raiselow = PRERAISEAFTER;
                                c = *s; *s = 0;
                                if ( OpenStream(namebuf+1,DOLLARSTREAM,0,raiselow) == 0 ) {
                                        *s = c;
                                        MesPrint("@Undefined variable %s used as preprocessor variable",
                                                namebuf);
                                        Terminate(-1);
                                }
                                *s = c;
                        }
                        else {
                                raiselow = PRENOACTION;
                                if ( AP.PreproFlag && *AP.preStart) {
                                        s = EndOfToken(AP.preStart);
                                        c = *s; *s = 0;
                                        if ( ( StrICmp(AP.preStart,(UBYTE *)"ifdef") == 0
                                        || StrICmp(AP.preStart,(UBYTE *)"ifndef") == 0 )
                                        && GetPreVar(namebuf,WITHOUTERROR) == 0 ) {
                                                *s = c; c = ' ';
                                                break;
                                        }
                                        *s = c; 
                                }
                                s = EndOfToken(namebuf);
                                if ( *s == '_' ) s++;
                                if ( *s == '-' && s[1] == '-' && s[2] == 0 )
                                        raiselow = PRELOWERAFTER;
                                else if ( *s == '+' && s[1] == '+' && s[2] == 0 )
                                        raiselow = PRERAISEAFTER;
                                else if ( *s == '(' && namebuf[i-2] == ')' ) {
/*
                                        Now count the arguments and separate them by zeroes
                                        Check on the ?var construction and if present, reset
                                        some comma's.
                                        Make the assignments of the variables
                                        Run the macro.
                                        Undefine the variables
*/
                                        int nargs = 1;
                                        PREVAR *p;
                                        size_t p_offset;
                                        *s++ = 0; namebuf[i-2] = 0;
                                        if ( StrICmp(namebuf,(UBYTE *)"random_") == 0 ) {
                                                UBYTE *ranvalue;
                                                ranvalue = PreRandom(s);
                                                PutPreVar(namebuf,ranvalue,(UBYTE *)"?a",1);
                                                M_free(ranvalue,"PreRandom");
                                                goto dostream;
                                        }
                                        else if ( StrICmp(namebuf,(UBYTE *)"tolower_") == 0 ) {
                                                UBYTE *ss = s;
                                                while ( *ss ) { *ss = (UBYTE)(tolower(*ss)); ss++; }
                                                PutPreVar(namebuf,s,(UBYTE *)"?a",1);
                                                goto dostream;
                                        }
                                        else if ( StrICmp(namebuf,(UBYTE *)"toupper_") == 0 ) {
                                                UBYTE *ss = s;
                                                while ( *ss ) { *ss = (UBYTE)(toupper(*ss)); ss++; }
                                                PutPreVar(namebuf,s,(UBYTE *)"?a",1);
                                                goto dostream;
                                        }
                                        else if ( StrICmp(namebuf,(UBYTE *)"takeleft_") == 0 ) {
                                                UBYTE *ss = s;
                                                int x = 0, nsize;
                                                while ( *ss != ',' && *ss ) ss++;
                                                nsize = ss-s;
                                                if ( *ss ) {
                                                        *ss++ = 0;
                                                        while ( FG.cTable[*ss] == 1 ) x = 10*x + (*ss++ - '0');
                                                        if ( x > nsize ) x = nsize;
                                                }
                                                else x = 0;
                                                PutPreVar(namebuf,s+x,(UBYTE *)"?a",1);
                                                goto dostream;
                                        }
                                        else if ( StrICmp(namebuf,(UBYTE *)"takeright_") == 0 ) {
                                                UBYTE *ss = s;
                                                int x = 0, nsize;
                                                while ( *ss != ',' && *ss ) ss++;
                                                nsize = ss-s;
                                                if ( *ss ) {
                                                        *ss++ = 0;
                                                        while ( FG.cTable[*ss] == 1 ) x = 10*x + (*ss++ - '0');
                                                        if ( x > nsize ) x = nsize;
                                                }
                                                else x = 0;
                                                x = nsize - x;
                                                s[x] = 0;
                                                PutPreVar(namebuf,s,(UBYTE *)"?a",1);
                                                goto dostream;
                                        }
                                        else if ( StrICmp(namebuf,(UBYTE *)"keepleft_") == 0 ) {
                                                UBYTE *ss = s;
                                                int x = 0, nsize;
                                                while ( *ss != ',' && *ss ) ss++;
                                                nsize = ss-s;
                                                if ( *ss ) {
                                                        *ss++ = 0;
                                                        while ( FG.cTable[*ss] == 1 ) x = 10*x + (*ss++ - '0');
                                                        if ( x > nsize ) x = nsize;
                                                }
                                                else x = nsize;
                                                s[x] = 0;
                                                PutPreVar(namebuf,s,(UBYTE *)"?a",1);
                                                goto dostream;
                                        }
                                        else if ( StrICmp(namebuf,(UBYTE *)"keepright_") == 0 ) {
                                                UBYTE *ss = s;
                                                int x = 0, nsize;
                                                while ( *ss != ',' && *ss ) ss++;
                                                nsize = ss-s;
                                                if ( *ss ) {
                                                        *ss++ = 0;
                                                        while ( FG.cTable[*ss] == 1 ) x = 10*x + (*ss++ - '0');
                                                        if ( x > nsize ) x = nsize;
                                                }
                                                else x = nsize;
                                                x = nsize-x;
                                                PutPreVar(namebuf,s+x,(UBYTE *)"?a",1);
                                                goto dostream;
                                        }
                                        while ( *s ) {
                                                if ( *s == '\\' ) s++;
                                                if ( *s == ',' ) { *s = 0; nargs++; }
                                                s++;
                                        }
                                        GetPreVar(namebuf,WITHERROR);
                                        p = ThePreVar;
                                        if ( p == 0 ) {
                                                MesPrint("@Illegal use of arguments in preprocessor variable %s",namebuf);
                                                Terminate(-1);
                                        }
                                        if ( p->nargs <= 0 || ( p->wildarg == 0 && nargs != p->nargs )
                                                || ( p->wildarg > 0 && nargs < p->nargs-1 ) ) {
                                                MesPrint("@Arguments of macro %s do not match",namebuf);
                                                Terminate(-1);
                                        }
                                        if ( p->wildarg > 0 ) {
/*
                                                Change some zeroes into commas
*/
                                                s = namebuf;
                                                for ( j = 0; j < p->wildarg; j++ ) {
                                                        while ( *s ) s++;
                                                        s++;
                                                }
                                                for ( j = 0; j < nargs-p->nargs; j++ ) {
                                                        while ( *s ) s++;
                                                        *s++ = ',';
                                                }
                                        }
/*
                                                Now we can make the assignments
*/
                                        s = namebuf;
                                        while ( *s ) s++;
                                        s++;
                                        t = p->argnames;
                                        p_offset = p - PreVar;
                                        for ( j = 0; j < p->nargs; j++ ) {
                                                if ( ( nargs == p->nargs-1 ) && ( *t == '?' ) ) {
                                                        PutPreVar(t,0,0,0);
                                                }
                                                else {
                                                        PutPreVar(t,s,0,0);
                                                        while ( *s ) s++;
                                                        s++;
                                                }
                                                p = PreVar + p_offset;
                                                while ( *t ) t++;
                                                t++;
                                        }
                                }
dostream:;
                                if ( ( stream = OpenStream(namebuf,PREVARSTREAM,0,raiselow) ) == 0 ) {
/*
                                        Eat comma before or after. This is `no value'
*/
                                }
                                else if ( stream->inbuffer == 0 ) {
                                        c = GetInput();
                                        if ( level > 0 && c == '\'' ) return(c);
                                        goto endofloop;
                                }
                        }
                        c = GetInput();
                }
                else if ( c == '{' ) { /* Try the preprocessor calculator */
                        if ( PreCalc() == 0 ) Terminate(-1);
                        c = GetInput();    /* This is either a { or a number */
                        break;
                }
                else break;
endofloop:;
        }
        return(c);        
}

/*
                 #] GetChar : 
                 #[ CharOut :
*/

VOID CharOut(UBYTE c)
{
        if ( c == LINEFEED ) {
                AM.OutBuffer[AP.InOutBuf++] = c;
                WriteString(INPUTOUT,AM.OutBuffer,AP.InOutBuf);
                AP.InOutBuf = 0;
        }
        else {
                if ( AP.InOutBuf >= AM.OutBufSize || c == LINEFEED ) {
                        WriteString(INPUTOUT,AM.OutBuffer,AP.InOutBuf);
                        AP.InOutBuf = 0;
                }
                AM.OutBuffer[AP.InOutBuf++] = c;
        }
}

/*
                 #] CharOut : 
                 #[ UnsetAllowDelay :
*/

VOID UnsetAllowDelay(VOID)
{
        if ( ThePreVar != 0 ) {
                if ( ThePreVar->nargs > 0 ) AP.AllowDelay = 0;
        }
}

/*
                 #] UnsetAllowDelay : 
                 #[ GetPreVar :

                We use the model of a heap. If the same name has been used more
                than once the last definition is used. This gives the impression
                of local variables.

                There are two types: The regular ones and the expression variables.
                The last ones are like UNCHANGED_exprname and ZERO_exprname or
                UNCHANGED_ and ZERO_.
*/

static UBYTE *yes = (UBYTE *)"1";
static UBYTE *no  = (UBYTE *)"0";
static UBYTE numintopolynomial[12];
#include "vector.h"
static Vector(UBYTE, exprstr);  /* Used for numactiveexprs_ and activeexprnames_. */

UBYTE *GetPreVar(UBYTE *name, int flag)
{
        GETIDENTITY
        int i, mode;
        WORD number;
        UBYTE *t, c = 0, *tt = 0;
        t = name; while ( *t ) t++;
        if ( t[-1] == '-' && t[-2] == '-' && t-2 > name && t[-3] != '_' ) {
                t -= 2; c = *t; *t = 0; tt = t;
        }
        else if ( t[-1] == '+' && t[-2] == '+' && t-2 > name && t[-3] != '_' ) {
                t -= 2; c = *t; *t = 0; tt = t;
        }
        else if ( StrICmp(name,(UBYTE *)"time_") == 0 ) {
                UBYTE millibuf[24];
                LONG millitime, timepart;
                int timepart1, timepart2;
                static char timestring[40];
/*                millitime = TimeCPU(1); */
                millitime = GetRunningTime();
                timepart = millitime%1000;
                millitime /= 1000;
                timepart /= 10;
                timepart1 = timepart / 10;
                timepart2 = timepart % 10;
                NumToStr(millibuf,millitime);
            snprintf(timestring,40,"%s.%1d%1d",millibuf,timepart1,timepart2);
                return((UBYTE *)timestring);
        }
        else if ( ( StrICmp(name,(UBYTE *)"timer_") == 0 )
               || ( StrICmp(name,(UBYTE *)"stopwatch_") == 0 ) ) {
                static char timestring[40];
            snprintf(timestring,40,"%ld",(GetRunningTime() - AP.StopWatchZero));
                return((UBYTE *)timestring);
        }
        else if ( StrICmp(name, (UBYTE *)"numactiveexprs_") == 0 ) {
                /* the number of active expressions */
                int n = 0;
                for ( i = 0; i < NumExpressions; i++ ) {
                        EXPRESSIONS e = Expressions + i;
                        switch ( e->status ) {
                                case LOCALEXPRESSION:
                                case GLOBALEXPRESSION:
                                case UNHIDELEXPRESSION:
                                case UNHIDEGEXPRESSION:
                                case INTOHIDELEXPRESSION:
                                case INTOHIDEGEXPRESSION:
                                        n++;
                                        break;
                        }
                }
                VectorReserve(exprstr, 41);  /* up to 128-bit */
                LongCopy(n, (char *)VectorPtr(exprstr));
                return VectorPtr(exprstr);
        }
        else if ( StrICmp(name, (UBYTE *)"activeexprnames_") == 0 ) {
                /* the list of active expressions separated by commas */
                int j = 0;
                VectorReserve(exprstr, 16);  /* at least 1 character for '\0' */
                for ( i = 0; i < NumExpressions; i++ ) {
                        UBYTE *p, *s;
                        int len, k;
                        EXPRESSIONS e = Expressions + i;
                        switch ( e->status ) {
                                case LOCALEXPRESSION:
                                case GLOBALEXPRESSION:
                                case UNHIDELEXPRESSION:
                                case UNHIDEGEXPRESSION:
                                case INTOHIDELEXPRESSION:
                                case INTOHIDEGEXPRESSION:
                                        s = AC.exprnames->namebuffer + e->name;
                                        len = StrLen(s);
                                        VectorSize(exprstr) = j;  /* j bytes must be copied in extending the buffer. */
                                        VectorReserve(exprstr, j + len * 2 + 1);
                                        p = VectorPtr(exprstr);
                                        if ( j > 0 ) p[j++] = ',';
                                        for ( k = 0; k < len; k++ ) {
                                                if ( s[k] == ',' || s[k] == '|' ) p[j++] = '\\';
                                                p[j++] = s[k];
                                        }
                                        break;
                        }
                }
                VectorPtr(exprstr)[j] = '\0';
                return VectorPtr(exprstr);
        }
        else if ( StrICmp(name, (UBYTE *)"path_") == 0 ) {
                /* the current FORM path (for debugging both in .c and .frm) */
                if ( AM.Path ) {
                        return(AM.Path);
                }
                else {
                        return((UBYTE *)"");
                }
        }
        t = name;
        while ( *t && *t != '_' ) t++;
        for ( i = NumPre-1; i >= 0; i-- ) {
                if ( *t == '_' && ( StrICmp(name,PreVar[i].name) == 0 ) ) {
                        if ( c ) *tt = c;
                        ThePreVar = PreVar+i;
                        return(PreVar[i].value);
                }
                else if ( StrCmp(name,PreVar[i].name) == 0 ) {
                        if ( c ) *tt = c;
                        ThePreVar = PreVar+i;
                        return(PreVar[i].value);
                }
        }
        if ( *t == '_' ) {
                if ( StrICmp(name,(UBYTE *)"EXTRASYMBOLS_") == 0 ) goto extrashort;
                *t = 0;
                if ( StrICmp(name,(UBYTE *)"UNCHANGED") == 0 ) mode = 1;
                else if ( StrICmp(name,(UBYTE *)"ZERO") == 0 ) mode = 0;
                else if ( StrICmp(name,(UBYTE *)"SHOWINPUT") == 0 ) {
                        *t++ = '_';
                        if ( c ) *tt = c;
                        if ( AC.NoShowInput > 0 ) return(no);
                        else return(yes);
                }
                else if ( StrICmp(name,(UBYTE *)"EXTRASYMBOLS") == 0 ) {
                        *t++ = '_';
extrashort:;
                        number = cbuf[AM.sbufnum].numrhs;
                        t = numintopolynomial;
                        NumCopy(number,t);
                        return(numintopolynomial);
                }
                else mode = -1;
                *t++ = '_';
                if ( mode >= 0 ) {
                        ThePreVar = 0;
                        if ( *t ) {
                                if ( GetName(AC.exprnames,t,&number,NOAUTO) == CEXPRESSION ) {
                                        if ( c ) *tt = c;
                                        if ( ( Expressions[number].vflags & ( 1 << mode ) ) != 0 )
                                                 return(yes);
                                        else return(no);
                                }
                        }
                        else {
/*
                                Here we have to test all active results.
                                These are in `negative' so the flags have to be zero.
*/
                                if ( c ) *tt = c;
                                if ( ( AR.expflags & ( 1 << mode ) ) == 0 ) return(yes);
                                else return(no);
                        }
                }
        }
        if ( ( t = (UBYTE *)(getenv((char *)(name))) ) != 0 ) {
                if ( c ) *tt = c;
                ThePreVar = 0;
                return(t);
        }
        if ( c ) *tt = c;
        if ( flag == WITHERROR ) {
                Error1("Undefined preprocessor variable",name);
        }
        return(0);
}

/*
                 #] GetPreVar : 
                 #[ PutPreVar :
*/

/**
 *  Inserts/Updates a preprocessor variable in the name administration.
 * 
 *  @param   name    Character string with the variable name.
 *  @param   value   Character string with a possible value.
 *                   Special case: if this argument is zero, then we have no
 *                   value. Note: This is different from having an empty
 *                   argument! This should only occur when the name starts
 *                   with a ?
 *  @param   args    Character string with possible arguments.
 *  @param   mode    =0: always create a new name entry, =1: try to do a
 *                   redefinition if possible.
 *  @return          Index of used entry in name list.
 */
int PutPreVar(UBYTE *name, UBYTE *value, UBYTE *args, int mode)
{
        int i, ii, num = 2, nnum = 2, numargs = 0;
        UBYTE *s, *t, *u = 0;
        PREVAR *p;
        if ( value == 0 && name[0] != '?' ) {
                MesPrint("@Illegal empty value for preprocessor variable %s",name);
                Terminate(-1);
        }
        if ( args ) {
                s = args; num++;
                while ( *s ) {
                        if ( *s != ' ' && *s != '\t' ) num++;
                        s++;
                }
        }
        if ( mode == 1 ) {
                i = NumPre;
                while ( --i >= 0 ) {
                        if ( StrCmp(name,PreVar[i].name) == 0 ) {
                                u = PreVar[i].name;
                                break;
                        }
                }
        }
        else i = -1;
        if ( i < 0 ) { p = (PREVAR *)FromList(&AP.PreVarList); ii = p - PreVar; }
        else         { p = &(PreVar[i]);            ii = i; }
        if ( value ) {
                s = value; while ( *s ) { s++; num++; }
        }
        else num = 1;
        if ( i >= 0 ) {
                if ( p->value ) {
                        s = p->value;
                        while ( *s ) { s++; nnum++; }
                }
                else nnum = 1;
                if ( nnum >= num ) {
/*
                        We can keep this in place
*/
                        if ( value && p->value ) {
                                s = value;
                                t = p->value;
                                while ( *s ) *t++ = *s++;
                                *t = 0;
                        }
                        else p->value = 0;
                        return(i);
                }
        }
        s = name;  while ( *s ) { s++; num++; }
        t = (UBYTE *)Malloc1(num,"PreVariable");
        p->name = t;
        s = name;  while ( *s ) *t++ = *s++; *t++ = 0;
        if ( value ) {
                p->value = t;
                s = value; while ( *s ) *t++ = *s++; *t = 0;
                if ( AM.atstartup && t[-1] == '\n' ) t[-1] = 0;
        }
        else p->value = 0;
        p->wildarg = 0;
        if ( args ) {
                int first = 1;
                t++; p->argnames = t;
                s = args;
                while ( *s ) {
                        if ( *s == ' ' || *s == '\t' ) { s++; continue; }
                        if ( *s == ',' ) {
                                s++; *t++ = 0; numargs++;
                                while ( *s == ' ' || *s == '\t' ) s++;
                                if ( *s == '?' ) {
                                        if ( p->wildarg > 0 ) {
                                                Error0("More than one ?var in #define");
                                        }
                                        p->wildarg = numargs;
                                }
                        }
                        else if ( *s == '?' && first ) {
                                p->wildarg = 1; *t++ = *s++;
                        }
                        else { *t++ = *s++; }
                        first = 0;
                }
                *t = 0;
                numargs++;
                p->nargs = numargs;
        }
        else {
                p->nargs = 0;
                p->argnames = 0;
        }
        if ( u ) M_free(u,"replace PreVar value");
        return(ii);
}

/*
                 #] PutPreVar : 
                 #[ PopPreVars :
*/

VOID PopPreVars(int tonumber)
{
        PREVAR *p = &(PreVar[NumPre]);
        while ( NumPre > tonumber ) {
                NumPre--; p--;
                M_free(p->name,"popping PreVar");
                p->name = p->value = 0;
        }
}

/*
                 #] PopPreVars : 
                 #[ IniModule :
*/

VOID IniModule(int type)
{
        GETIDENTITY
        WORD **w, i;
        CBUF *C = cbuf+AC.cbufnum;
        /*[05nov2003 mt]:*/ 
#ifdef WITHMPI
        /* To prevent
         *   (1) FlushOut() and PutOut() on the slaves to send a mess to the master
         *       compiling a module,
         *   (2) EndSort() called from poly_factorize_expression() on the master
         *       waits for the slaves.
         */
        PF.parallel=0;
        /*BTW, this was the bug preventing usage of more than 1 expression!*/
#endif

        AR.BracketOn = 0;
        AR.StoreData.dirtyflag = 0;
        AC.bracketindexflag = 0;
        AT.bracketindexflag = 0;

/*[06nov2003 mt]:*/
#ifdef WITHMPI
        /* This flag may be set in the procedure tokenize(). */
        AC.RhsExprInModuleFlag = 0;
/*[20oct2009 mt]:*/
        PF.mkSlaveInfile=0;
        PF.slavebuf.PObuffer=NULL;
        for(i=0; i<NumExpressions; i++)
                Expressions[i].vflags &= ~ISINRHS;
/*:[20oct2009 mt]*/
#endif
/*:[06nov2003 mt]*/

        /*[19nov2003 mt]:*/
        /*The module counter:*/
        (AC.CModule)++;
        /*:[19nov2003 mt]*/

        if ( !type ) {
                if ( C->rhs ) {
                        w = C->rhs; i = C->maxrhs;
                        do { *w++ = 0; } while ( --i > 0 );
                }
                if ( C->lhs ) {
                        w = C->lhs; i = C->maxlhs;
                        do { *w++ = 0; } while ( --i > 0 );
                }
        }
        C->numlhs = C->numrhs = 0;
        ClearTree(AC.cbufnum);
        while ( AC.NumLabels > 0 ) {
                AC.NumLabels--;
                if ( AC.LabelNames[AC.NumLabels] ) M_free(AC.LabelNames[AC.NumLabels],"LabelName");
        }

        C->Pointer = C->Buffer;

        AC.Commercial[0] = 0;

        AC.IfStack = AC.IfHeap;
        AC.arglevel = 0;
        AC.termlevel = 0;
        AC.IfLevel = 0;
        AC.WhileLevel = 0;
        AC.RepLevel = 0;
        AC.insidelevel = 0;
        AC.dolooplevel = 0;
        AC.MustTestTable = 0;
        AO.PrintType = 0;                                /* Otherwise statistics can get spoiled */
        AC.ComDefer = 0;
        AC.CollectFun = 0;
        AM.S0->PolyWise = 0;
        AC.SymChangeFlag = 0;
        AP.lhdollarerror = 0;
        AR.PolyFun = AC.lPolyFun;
        AR.PolyFunInv = AC.lPolyFunInv;
        AR.PolyFunType = AC.lPolyFunType;
        AR.PolyFunExp = AC.lPolyFunExp;
        AR.PolyFunVar = AC.lPolyFunVar;
        AR.PolyFunPow = AC.lPolyFunPow;
        AC.mparallelflag = AC.parallelflag | AM.hparallelflag;
        AC.inparallelflag = 0;
        AC.mProcessBucketSize = AC.ProcessBucketSize;
        NumPotModdollars = 0;
        AC.topolynomialflag = 0;
#ifdef WITHPTHREADS
        if ( AM.totalnumberofthreads > 1 ) AS.MultiThreaded = 1;
        else AS.MultiThreaded = 0;
        for ( i = 1; i < AM.totalnumberofthreads; i++ ) {
                AB[i]->T.S0->PolyWise = 0;
        }
#endif
        OpenTemp();
}

/*
                 #] IniModule : 
                 #[ IniSpecialModule :
*/

VOID IniSpecialModule(int type)
{
        DUMMYUSE(type);
}

/*
                 #] IniSpecialModule : 
                 #[ PreProcessor :
*/

VOID PreProcessor(VOID)
{
        int moduletype = FIRSTMODULE;
        int specialtype = 0;
        int error1 = 0, error2 = 0, retcode, retval;
        UBYTE c, *t, *s;
        AP.StopWatchZero = GetRunningTime();
        AC.compiletype = 0;
        AP.PreContinuation = 0;
        AP.PreAssignLevel = 0;
        AP.gNumPre = NumPre;
        AC.iPointer = AC.iBuffer;
        AC.iPointer[0] = 0;

        if ( AC.CheckpointFlag == -1 ) DoRecovery(&moduletype);
        AC.CheckpointStamp = Timer(0);

        for(;;) {
/*                if ( A.StatisticsFlag ) CharOut(LINEFEED); */

                IniModule(moduletype);

                /*Re-define preprocessor variable CMODULE_ as a current module number, starting from 1*/
                /*The module counter is AC.CModule, it is incremented in IniModule*/
                {
                        UBYTE buf[24];/*64/Log_2[10] = 19.3, this is enough for any integer*/
                        NumToStr(buf,AC.CModule);
                        PutPreVar((UBYTE *)"CMODULE_",buf,0,1);
                }

                if ( specialtype ) IniSpecialModule(specialtype);

                for(;;) {        /* Read a single line/statement */
                        c = GetChar(0);
                        if ( c == AP.ComChar ) {  /* This line is commentary */
                                LoadInstruction(5);
                                if ( AC.CurrentStream->FoldName ) {
                                        t = AP.preStart;
                                        if ( *t && t[1] && t[2] == '#' && t[3] == ']' ) {
                                                t += 4;
                                                while ( *t == ' ' || *t == '\t' ) t++;
                                                s = AC.CurrentStream->FoldName;
                                                while ( *s == *t ) { s++; t++; }
                                                if ( *s == 0 && ( *t == ' ' || *t == '\t'
                                                || *t == ':' ) ) {
                                                        while ( *t == ' ' || *t == '\t' ) t++;
                                                        if ( *t == ':' ) {
                                                                AC.CurrentStream = CloseStream(AC.CurrentStream);
                                                        }
                                                }
                                        }
                                }
                                *AP.preStart = 0;
                                continue;
                        }
                        while ( c == ' ' || c == '\t' ) c = GetChar(0);
                        if ( c == LINEFEED ) continue;
                        if ( c == ENDOFINPUT ) {
/*                                CharOut(LINEFEED); */
                                Warning(".end instruction generated");
                                moduletype = ENDMODULE; specialtype = 0;
                                goto endmodule; /* Fake one */
                        }
                        if ( c == '#' ) {
                                if ( PreProInstruction() ) { error1++; error2++; AP.preError++; }
                                *AP.preStart = 0;
                        }
                        else if ( c == '.' ) {
                                if ( ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) ||
                                ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) ) {
                                        LoadInstruction(1);
                                        continue;
                                }
                                if ( ModuleInstruction(&moduletype,&specialtype) ) { error2++; AP.preError++; }
                                if ( specialtype ) SetSpecialMode(moduletype,specialtype);
                                if ( AP.PreInsideLevel != 0 ) {
                                        MesPrint("@end of module instructions may not be used inside");
                                        MesPrint("@the scope of a %#inside %#endinside construction.");
                                        Terminate(-1);
                                }
                                if ( AC.RepLevel > 0 ) {
                                        MesPrint("&EndRepeat statement(s) missing");
                                        error2++; AP.preError++;
                                }
                                if ( AC.tablecheck == 0 ) {
                                        AC.tablecheck = 1;
                                        if ( TestTables() ) { error2++; AP.preError++; }
                                }
                                if ( AP.PreContinuation ) {
                                        error1++; error2++;
                                        MesPrint("&Unfinished statement. Missing ;?");
                                }
                                if ( moduletype == GLOBALMODULE ) MakeGlobal();
                                else {
endmodule:                        if ( error2 == 0 && AM.qError == 0 ) {
                                                retcode = ExecModule(moduletype);
#ifdef WITHMPI
                                                if(PF.slavebuf.PObuffer!=NULL){
                                                        M_free(PF.slavebuf.PObuffer,"PF inbuf");
                                                        PF.slavebuf.PObuffer=NULL;
                                                }
#endif
                                                UpdatePositions();
                                                if ( retcode < 0 ) error1++;
                                                if ( retcode ) { error2++; AP.preError++; }
                                        }
                                        else {
                                                EXPRESSIONS e;
                                                WORD j;
                                                for ( j = 0, e = Expressions; j < NumExpressions; j++, e++ ) {
                                                        if ( e->replace == NEWLYDEFINEDEXPRESSION ) e->replace = REGULAREXPRESSION;
                                                }
                                        }
                                        switch ( moduletype ) {
                                                case STOREMODULE:
                                                        if ( ExecStore() ) error1++;
                                                        break;
                                                case CLEARMODULE:
                                                        FullCleanUp();
                                                        error1 = error2 = AP.preError = 0;
                                                        AM.atstartup = 1;
                                                        PutPreVar((UBYTE *)"DATE_",(UBYTE *)MakeDate(),0,1);
                                                        AM.atstartup = 0;
                                                        if ( AM.resetTimeOnClear ) {
#ifdef WITHPTHREADS
                                                                ClearAllThreads();
#endif
                                                                AM.SumTime += TimeCPU(1);
                                                                TimeCPU(0);
                                                        }
                                                        AP.StopWatchZero = GetRunningTime();
                                                        break;
                                                case ENDMODULE:
                                                        Terminate( -( error1 | error2 ) );
                                        }
                                }
                                AC.tablecheck = 0;
                                AC.compiletype = 0;
                                if ( AC.exprfillwarning > 0 ) {
                                        AC.exprfillwarning = 0;
                                }
                                if ( AC.CheckpointFlag && error1 == 0 && error2 == 0 ) DoCheckpoint(moduletype);
                                break;  /* start a new module */
                        }
                        else {
                                if ( ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) ||
                                ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) ) {
                                        pushbackchar = c;
                                        LoadInstruction(5);
                                        continue;
                                }
                                UngetChar(c);
                                if ( AP.PreContinuation ) {
                                        retval = LoadStatement(OLDSTATEMENT);
                                }
                                else {
                                        AC.CurrentStream->prevline = AC.CurrentStream->linenumber;
                                        retval = LoadStatement(NEWSTATEMENT);
                                }
                                if ( retval < 0 ) {
                                        error1++;
                                        if ( retval == -1 ) AP.PreContinuation = 0;
                                        else AP.PreContinuation = 1;
                                        TryRecover(0);
                                }
                                else if ( retval > 0 ) AP.PreContinuation = 0;
                                else AP.PreContinuation = 1;
                                if ( error1 == 0 && !AP.PreContinuation ) {
                                        if ( ( AP.PreDebug & PREPROONLY ) == 0 ) {
                                                int onpmd = NumPotModdollars;
#ifdef WITHMPI
                                                WORD oldRhsExprInModuleFlag = AC.RhsExprInModuleFlag;
                                                if ( AP.PreAssignFlag ) AC.RhsExprInModuleFlag = 0;
#endif
                                                if ( AP.PreOut || ( AP.PreDebug & DUMPTOCOMPILER )
                                                                == DUMPTOCOMPILER )
                                                                        MesPrint(" %s",AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel]);
                                                retcode = CompileStatement(AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel]);
                                                if ( retcode < 0 ) error1++;
                                                if ( retcode ) { error2++; AP.preError++; }
                                                if ( AP.PreAssignFlag ) {
                                                        if ( retcode == 0 ) {
                                                                if ( ( retcode = CatchDollar(0) ) < 0 ) error1++;
                                                                else if ( retcode > 0 ) { error2++; AP.preError++; }
                                                        }
                                                        else CatchDollar(-1);
                                                        POPPREASSIGNLEVEL;
                                                        if ( AP.PreAssignLevel <=0 )
                                                                AP.PreAssignFlag = 0;
                                                        NumPotModdollars = onpmd;
#ifdef WITHMPI
                                                        AC.RhsExprInModuleFlag = oldRhsExprInModuleFlag;
#endif
                                                }
                                        }
                                        else {
                                                MesPrint(" %s",AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel]);
                                        }
                                }
                                else if ( !AP.PreContinuation ) {
                                        if ( AP.PreAssignLevel > 0 ) {
                                                POPPREASSIGNLEVEL;
                                                if ( AP.PreAssignLevel <=0 )
                                                        AP.PreAssignFlag = 0;
                                        }
                                }
/*
                                if ( !AP.PreContinuation ) AP.PreAssignFlag = 0;
*/
                        }
                }
        }
}

/*
                 #] PreProcessor : 
                 #[ PreProInstruction :
*/

int PreProInstruction(VOID)
{
        UBYTE *s, *t;
        KEYWORD *key;
        AP.PreproFlag = 1;
        AP.preFill = 0;
        AP.AllowDelay = 0;
        AP.DelayPrevar = 0;

        oldmode = 0;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) {
                LoadInstruction(3);
                if ( ( StrICmp(AP.preStart,(UBYTE *)"case") == 0
                || StrICmp(AP.preStart,(UBYTE *)"default") == 0 )
                && AP.PreSwitchModes[AP.PreSwitchLevel] == SEARCHINGPRECASE ) {
                        LoadInstruction(0);
                }
                else if ( StrICmp(AP.preStart,(UBYTE *)"assign ") == 0 ) {}
                else { LoadInstruction(1); }
        }
        else if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) {
                LoadInstruction(3);
                if ( ( StrICmp(AP.preStart,(UBYTE *)"else") == 0
                || StrICmp(AP.preStart,(UBYTE *)"elseif") == 0 )
                && AP.PreIfStack[AP.PreIfLevel] == LOOKINGFORELSE ) {
                        LoadInstruction(0);
                }
                else if ( StrICmp(AP.preStart,(UBYTE *)"assign ") == 0 ) {}
                else {
                        LoadInstruction(1);
                }
        }
        else {
                LoadInstruction(0);
        }
        AP.PreproFlag = 0;
        t = AP.preStart;
        if ( *t == '-' ) {
                if ( AP.PreSwitchModes[AP.PreSwitchLevel] == EXECUTINGPRESWITCH 
                        && AP.PreIfStack[AP.PreIfLevel] == EXECUTINGIF ) 
                        AC.NoShowInput = 1;
        }
        else if ( *t == '+' ) {
                if ( AP.PreSwitchModes[AP.PreSwitchLevel] == EXECUTINGPRESWITCH 
                        && AP.PreIfStack[AP.PreIfLevel] == EXECUTINGIF ) 
                        AC.NoShowInput = 0;
        }
        else if ( *t == ':' ) {}
        else {
retry:;
                key = FindKeyWord(t,precommands,sizeof(precommands)/sizeof(KEYWORD));
                s = EndOfToken(t);
                if ( key == 0 ) {
                        if ( *s == ';' ) {
                                *s = 0; goto retry;
                        }
                        else {
                                *s = 0;
                                MesPrint("@Unrecognized preprocessor instruction: %s",t);
                                return(-1);
                        }
                }
                while ( *s == ' ' || *s == '\t' || *s == ',' ) s++;
                t = s;
                while ( *t ) t++;
                while ( ( t[-1] == ';' ) && ( t[-2] != '\\' ) ) {
                        t--; *t = 0;
                }
                return((key->func)(s));
        }
        return(0);
}

/*
                 #] PreProInstruction : 
                 #[ LoadInstruction :

                0:  preprocessor instruction that may involve matching of brackets
                1:  runs straight to end-of-line
                2:        runs to ;
                3:        only gets one word without `' interpretation.
                5:        with pushbackchar, but inside commentary. -> 1

To be added:
        In define, redefine, call and listed do we may have delayed substitution
        of preprocessor variables.
*/

int LoadInstruction(int mode)
{
        UBYTE *s, *sstart, *t, c, cp;
        LONG position, fillpos = 0;
        int bralevel = 0, parlevel = 0, first = 1;
        int quotelevel = 0;
        if ( AP.preFill ) {
                s = AP.preFill;
                AP.preFill = 0;
                if ( s[1] != LINEFEED && s[1] != ENDOFINPUT ) {
                        s[0] = s[1]; s++;
                }
                else { oldmode = mode; return(0); }
        }
        else { s = AP.preStart; }
        sstart = s; *s = 0;
        for(;;) {
                if ( ( mode & 1 ) == 1 ) {
                        if ( pushbackchar && ( mode == 3 || mode == 5 ) ) {
                                c = pushbackchar; pushbackchar = 0;
                        }
                        else c = GetInput();
                }
                else {
                        c = GetChar(0);
                }

                if ( mode == 2 && c == ';' ) break;
                if ( ( mode == 1 || mode == 5 ) && c == LINEFEED ) break;
                if ( mode == 3 && FG.cTable[c] != 0 ) {
                        if ( c == '$' ) {
                                pushbackchar = '$';
                                *s++ = 'a'; *s++ = 's'; *s++ = 's'; *s++ = 'i';
                                *s++ = 'g'; *s++ = 'n'; *s++ = ' '; *s = 0;
                        }
                        if ( c == '\'' || c == '`' ) { /* we do not expand preprocessor variables */
                                mode = 1;
                        }
                        else {
                                AP.preFill = s; *s++ = 0; *s = c;
                                oldmode = mode;
                                return(0);
                        }
                }
                if ( mode == 0 && first ) {
                        if ( c == '$' ) {
dodollar:                s = sstart;
                                *s++ = 'a'; *s++ = 's'; *s++ = 's'; *s++ = 'i';
                                *s++ = 'g'; *s++ = 'n'; *s = 0;
                                pushbackchar = c;
                                oldmode = mode;
                                return(0);
                        }
                        if ( c == ' ' || c == '\t' || c == ',' ) {}
                        else first = 0;
                }
                else if ( mode == 1 && first && c == '$' && oldmode == 3 ) goto dodollar;
                if ( c == ENDOFINPUT || ( c == LINEFEED
/*                && bralevel == 0  */
                && quotelevel == 0 ) ) {
                        if ( mode == 2 && c == ENDOFINPUT ) {
                                MesPrint("@Unexpected end of instruction");
                                oldmode = mode;
                                return(-1);
                        }
/*
                        if ( mode == 0 && bralevel ) {
                                MesPrint("@Unmatched brackets");
                                oldmode = mode;
                                return(-1);
                        }
*/
                        if ( mode != 2 ) break;
                }
                if ( quotelevel ) {
                        if ( c == '\\' ) {
                                if ( ( mode == 1 ) || ( mode == 5 ) ) c = GetInput();
                                else {
                                        c = GetChar(0);
                                }
                                if ( c == ENDOFINPUT ) {
                                        MesPrint("@Unmatched \"");
                                        if ( mode == 2 && c == ENDOFINPUT ) {
                                                MesPrint("@Unexpected end of instruction");
                                        }
/*
                                        if ( mode == 0 && bralevel ) {
                                                MesPrint("@Unmatched brackets");
                                        }
*/
                                        oldmode = mode;
                                        return(-1);
                                }
                                else if ( c == LINEFEED ) {} 
                                else if ( c == '"' ) { *s++ = '\\'; }
                                else {
                                        *s++ = '\\';
                                }
                        }
                        else if ( c == '"' ) {
                                quotelevel = 0;
                                AP.AllowDelay = 0;
                        }
                }
                else if ( c == '\\' ) {
                        if ( ( mode == 1 ) || ( mode == 5 ) ) cp = GetInput();
                        else {
                                cp = GetChar(0);
                        }
                        if ( cp == LINEFEED ) continue;
                        if ( mode != 2 || cp != ';' ) *s++ = c;
                        c = cp;
                }
                else if ( c == '"' ) {
/*
                        Now look back in the buffer and determine what the keyword is.
                        If it is define or redefine, put AllowDelay to 1.
*/
                        t = AP.preStart;
                        while ( FG.cTable[*t] <= 1 ) t++;
                        cp = *t; *t = 0;
                        if ( ( StrICmp(AP.preStart,(UBYTE *)"define") == 0 )
                                || ( StrICmp(AP.preStart,(UBYTE *)"redefine") == 0 ) ) {
                                AP.AllowDelay = 1;
                                oldstream = AC.CurrentStream;
                        }
                        *t = cp;
                        quotelevel = 1;
                }
                else if ( quotelevel == 0 && bralevel == 0 && c == '(' ) {
                        t = AP.preStart;
                        while ( FG.cTable[*t] <= 1 ) t++;
                        cp = *t; *t = 0;
                        if ( ( parlevel == 0 )
                                 && ( StrICmp(AP.preStart,(UBYTE *)"call") == 0 ) ) {
                                AP.AllowDelay = 1;
                                oldstream = AC.CurrentStream;
                        }
                        *t = cp;
                        parlevel++;
                }
                else if ( quotelevel == 0 && bralevel == 0 && c == ')' ) {
                        parlevel--;
                }
                else if ( quotelevel == 0 && parlevel == 0 && c == '{' ) {
                        t = AP.preStart;
                        while ( FG.cTable[*t] <= 1 ) t++;
                        cp = *t; *t = 0;
                        if ( ( bralevel == 0 )
                                && ( ( StrICmp(AP.preStart,(UBYTE *)"call") == 0 )
                                || ( StrICmp(AP.preStart,(UBYTE *)"do") == 0 ) ) ) {
                                AP.AllowDelay = 1;
                                oldstream = AC.CurrentStream;
                        }
                        *t = cp;
                        bralevel++;
                }
                else if ( quotelevel == 0 && parlevel == 0 && c == '}' ) {
                        bralevel--;
                        if ( bralevel < 0 ) {
                                if ( mode != 5 ) {
                                        MesPrint("@Unmatched brackets");
                                        oldmode = mode;
                                        return(-1);
                                }
                                bralevel = 0;
                        }
                }
                if ( s >= (AP.preStop-1) ) {
                        UBYTE **ppp;
                        position = s - AP.preStart;
                        if ( AP.preFill ) fillpos = AP.preFill - AP.preStart;
                        ppp = &(AP.preStart); /* to avoid a compiler warning */
                        if ( DoubleLList((VOID ***)ppp,&AP.pSize,sizeof(UBYTE),
                        "instruction buffer") ) { *s = 0; oldmode = mode; return(-1); }
                        AP.preStop = AP.preStart + AP.pSize-3;
                        s = AP.preStart + position;
                        if ( AP.preFill ) AP.preFill = fillpos + AP.preStart;
                }
                *s++ = c;
        }
        *s = 0;
        oldmode = mode;
        if ( mode == 0 ) {
                if ( ExpandTripleDots(1) < 0 ) return(-1);
        }
        return(0);
}

/*
                 #] LoadInstruction : 
                 #[ LoadStatement :

                Puts the current string together in the input buffer.
                Does things like placing comma's where needed and expand ...
                We force a comma after the keyword. Before 8-sep-2009 the program might
                not put a comma if a + or - followed. And then the compiler ate
                the + or - and we needed repair code in the routines that used the
                + or - (Print, modulus, multiply and (a)bracket). This worked but
                the problem was with statements like  Dimension -4; which then would
                be processed as Dimension 4; (JV)
*/

int LoadStatement(int type)
{
        UBYTE *s, c, cp;
        int retval = 0, stringlevel = 0, newstatement = 0;
        if ( type == NEWSTATEMENT ) { AP.eat = 1; newstatement = 1;
                s = AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel]; }
        else { s = AC.iPointer; *s = 0; c = ' '; goto blank; }
        *s = 0;
        for(;;) {
                c = GetChar(0);
                if ( c == ENDOFINPUT ) { retval = -1; break; }
                if ( stringlevel == 0 ) {
                        if ( c == LINEFEED ) {
                                if ( AP.eat < 0 ) { s--; AP.eat = 0; }
                                retval = 0; break;
                        }
                        if ( c == ';' ) {
                                if ( AP.eat < 0 ) { s--; AP.eat = 0; }
                                while ( ( c = GetChar(0) ) == ' ' || c == '\t' ) {}
                                if ( c != LINEFEED ) UngetChar(c);
                                retval = 1;
                                break;
                        }
                }
                if ( c == '\\' ) {
                        cp = GetChar(0);
                        if ( cp == LINEFEED ) continue;
                        *s++ = c;
                        c = cp;
                }
                if ( c == '"' ) {
                        if ( stringlevel == 0 ) stringlevel = 1;
                        else stringlevel = 0;
                        AP.eat = 0;
                }
                else if ( stringlevel == 0 ) {
                        if ( c == '\t' ) c = ' ';
                        if ( c == ' ' ) {
blank:                        if ( newstatement < 0 ) newstatement = 0;
                                if ( AP.eat && ( newstatement == 0 ) ) continue;
                                c = ',';
                                AP.eat = -2;
                                if ( newstatement > 0 ) newstatement = -1;
                        }
                        else if ( chartype[c] <= 3 ) {
                                AP.eat = 0;
                                if ( newstatement < 0 ) newstatement = 0;
                        }
                        else if ( c == ',' ) {
                                if ( newstatement > 0 ) {
                                        newstatement = -1;
                                        AP.eat = -2;
                                }
/*                                else if ( AP.eat == -2 ) { s--; } */
                                else if ( AP.eat == -2 ) { AP.eat = 1; continue; }
                                else { goto doall; }
                        }
                        else {
doall:;                        if ( AP.eat < 0 ) {
                                        if ( newstatement == 0 ) s--;
                                        else { newstatement = 0; }
                                }
                                else if ( newstatement == 1 ) newstatement = 0;
                                AP.eat = 1;
                                if ( c == '*' && s > AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel] && s[-1] == '*' ) {
                                        s[-1] = '^';
                                        continue;
                                }
                        }
                }
                if ( s >= AC.iStop ) {
                        if ( !AP.iBufError ) {
                                LONG position = s - AC.iBuffer;
                                LONG position2 = AC.iPointer - AC.iBuffer;
                                UBYTE **ppp = &(AC.iBuffer); /* to avoid a compiler warning */
                                if ( DoubleLList((VOID ***)ppp,&AC.iBufferSize
                                ,sizeof(UBYTE),"statement buffer") ) {
                                        *s = 0; retval = -1; AP.iBufError = 1;
                                }
                                AC.iPointer = AC.iBuffer + position2;
                                AC.iStop = AC.iBuffer + AC.iBufferSize-2;
                                s = AC.iBuffer + position;
                        }
                        if ( AP.iBufError ) {
                                for(;;){
                                        c = GetChar(0);
                                        if ( c == ENDOFINPUT ) { retval = -1; break; }
                                        if ( c == '"' ) {
                                                if ( stringlevel > 0 ) stringlevel = 0;
                                                else stringlevel = 1;
                                        }
                                        else if ( c == LINEFEED && !stringlevel ) { retval = -2; break; }
                                        else if ( c == ';' && !stringlevel ) {
                                                while ( ( c = GetChar(0) ) == ' ' || c == '\t' ) {}
                                                if ( c != LINEFEED ) UngetChar(c);
                                                retval = -1;
                                                break;
                                        }
                                        else if ( c == '\\' ) c = GetChar(0);
                                }
                                break;
                        }
                }
                *s++ = c;
        }
        AC.iPointer = s;
        *s = 0;
        if ( stringlevel > 0 ) {
                MesPrint("@Unbalanced \". Runaway string");
                retval = -1;
        }
        if ( retval == 1 ) {
                if ( ExpandTripleDots(0) < 0 ) retval = -1;
        }
        return(retval);
}

/*
                 #] LoadStatement : 
                 #[ ExpandTripleDots :
*/

static inline int IsSignChar(UBYTE c)
{
        return c == '+' || c == '-';
}

static inline int IsAlphanumericChar(UBYTE c)
{
        return FG.cTable[c] == 0 || FG.cTable[c] == 1;
}

static inline int CanParseSignedNumber(const UBYTE *s)
{
        while ( IsSignChar(*s) ) s++;
        return FG.cTable[*s] == 1;
}

int ExpandTripleDots(int par)
{
        UBYTE *s, *s1, *s2, *n1, *n2, *t1, *t2, *startp, operator1, operator2, c, cc;
        UBYTE *nBuffer, *strngs, *Buffer, *Stop;
        LONG withquestion, x1, x2, y1, y2, number, inc, newsize, pow, fullsize;
        int i, error = 0, i1 ,i2, ii, *nums = 0;

        if ( par == 0 ) {
                Buffer = AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel]; Stop = AC.iStop;
        }
        else {
                Buffer = AP.preStart; Stop = AP.preStop;
        }
        s = Buffer; while ( *s ) s++;
        fullsize = s - Buffer;
        if ( fullsize < 7 ) return(error);

        s = Buffer+2;
        while ( *s ) {
                if ( *s != '.' || ( s[-1] != ',' && FG.cTable[s[-1]] != 5 ) )
                        { s++; continue; }
                if ( s[-1] == '%' || s[-1] == '^' || s[1] != '.' || s[2] != '.' )
                        { s++; continue; }
                s1 = s - 2;
                s += 3;
                if ( *s != s[-4] && ( *s != '+' || s[-4] != '-' )
                 && ( *s != '-' || s[-4] != '+' ) ) {
                        MesPrint("&Improper operators for ...");
                        error = -1;
                } 
                operator1 = s[-4];
                operator2 = *s++;
                if ( operator1 == ':' ) operator1 = '.';
                if ( operator2 == ':' ) operator2 = '.';
/*
                We have now O1...O2 (O stands for operator)
                Full syntax is
                [str]#1[?]O1...O2[str]#2[?]   (Special case)
                in which both strings are identical and if one ? then also the other.
                <pattern1>O1...O2<pattern2>   (General case)
                in which the difference in the patterns is just numerical.
*/
                s2 = s;                        /* the beginning of the second string */
                if ( *s2 != '<' || *s1 != '>' ) {        /* Special case */
                        startp = s1+1;
                        withquestion = ( *s1 == '?' ); s1--;
                        while ( FG.cTable[*s1] == 1 && s1 >= Buffer ) s1--;
                        n1 = s1+1;                /* Beginning of first number */ 
                        if ( FG.cTable[*n1] != 1 ) {
                                MesPrint("&No first number in ... operator");
                                error = -1;
                        } 
                        while ( FG.cTable[*s1] <= 1 && s1 >= Buffer ) s1--;
                        s1++;
/*
                        We have now the first string from s1 to n1, number from n1
*/
                        t1 = s1; t2 = s2;
                        while ( t1 < n1 && *t1 == *t2 ) { t1++; t2++; }
                        n2 = t2;
                        if ( FG.cTable[*t2] != 1 ) {
                                MesPrint("&No second number in ... operator");
                                error = -1;
                        }
                        x2 = 0;
                        while ( FG.cTable[*t2] == 1 ) x2 = 10*x2 + *t2++ - '0';
                        x1 = 0;
                        while ( FG.cTable[*t1] == 1 ) x1 = 10*x1 + *t1++ - '0';
                        if ( withquestion != ( *t2 == '?' ) ) {
                                MesPrint("&Improper use of ? in ... operator");
                                if ( *t2 == '?' ) t2++;
                                error = -1;
                        }
                        else if ( withquestion ) t2++;
                        if ( FG.cTable[*t2] <= 2 ) {
                                MesPrint("&Illegal object after ... construction");
                                error = -1;
                        }
                        c = *n1; *n1 = 0; s = t2;
                        if ( error ) continue;
/*
                        At this point the syntax has been fulfilled. We have
                        str in s1.
                        x1,x2 are #1,#2
                        operator1,operator2 are the two operators.
                        s points at whatever comes after.
                        Expansion will have to be computed. 
*/
                        if ( x2 < x1 ) { number = x1-x2; inc = -1; y1 = x2; y2 = x1; }
                        else           { number = x2-x1; inc =  1; y1 = x1; y2 = x2; }
                        newsize = (number+1)*(n1-s1)                    /* the strings   */
                                 + number                                            /* the operators */
                                 +(number+1)*(withquestion?1:0)        /* questionmarks */
                                 +(number+1);                   /* last digits   */
                        pow = 10;
                        for ( i = 1; i < 10; i++, pow *= 10 ) {
                                if ( y1 >= pow )      newsize += number+1;
                                else if ( y2 >= pow ) newsize += y2-pow+1;
                                else break;
                        }
                        while ( Buffer+(fullsize+newsize-(s-s1)) >= Stop ) {
                                LONG strpos = s1-Buffer;
                                LONG endstr = n1-Buffer;
                                LONG startq = startp - Buffer;
                                LONG position = s - Buffer;
                                UBYTE **ppp;
                                if ( par == 0 ) {
                                        LONG position2 = AC.iPointer - AC.iBuffer;
                                        ppp = &(AC.iBuffer); /* to avoid a compiler warning */
                                        if ( DoubleLList((VOID ***)ppp,&AC.iBufferSize
                                                ,sizeof(UBYTE),"statement buffer") ) {
                                                        Terminate(-1);
                                        }
                                        AC.iPointer = AC.iBuffer + position2;
                                        AC.iStop = AC.iBuffer + AC.iBufferSize-2;
                                        Buffer = AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel]; Stop = AC.iStop;
                                }
                                else {
                                        LONG fillpos = 0;
                                        if ( AP.preFill ) fillpos = AP.preFill - AP.preStart;
                                        ppp = &(AP.preStart); /* to avoid a compiler warning */
                                        if ( DoubleLList((VOID ***)ppp,&AP.pSize,sizeof(UBYTE),
                                                "instruction buffer") ) {
                                                        Terminate(-1);
                                        }
                                        AP.preStop = AP.preStart + AP.pSize-3;
                                        if ( AP.preFill ) AP.preFill = fillpos + AP.preStart;
                                        Buffer = AP.preStart; Stop = AP.preStop;
                                }
                                s  = Buffer + position;
                                n1 = Buffer + endstr;
                                s1 = Buffer + strpos;
                                startp = Buffer + startq;
                        }
/*
                        We have space for the expansion in the buffer.
                        There are two cases: new size >  old size
                                             old size >= new size
                        Note that whereever we move things, it will be at least startp.
*/
                        if ( newsize > (s-s1) ) {
                                t2 = Buffer + fullsize;
                                t1 = t2 + (newsize - (s-s1));
                                *t1 = 0;
                                while ( t2 > s ) { *--t1 = *--t2; }
                        }
                        else if ( newsize < (s-s1) ) {
                                t1 = s1 + newsize; t2 = s; s = t1;
                                while ( *t2 ) *t1++ = *t2++;
                                *t1 = 0;
                        }
                        for ( x1 += inc, t1 = startp; number > 0; number--, x1 += inc ) {
                                *t1++ = operator1;
                                cc = operator1; operator1 = operator2; operator2 = cc;
                                t2 = s1; while ( *t2 ) *t1++ = *t2++;
                                x2 = x1; n2 = t1;
                                do {
                                        *t1++ = '0' + x2 % 10;
                                        x2 /= 10;
                                } while ( x2 );
                                s2 = t1 - 1;
                                while ( s2 > n2 ) { cc = *s2; *s2 = *n2; *n2++ = cc; s2--; }
                                if ( withquestion ) *t1++ = '?';
                        }
                        fullsize += newsize - ( s - s1 );
                        *n1 = c;
                }
                else {                /* General case. Find the patterns first */
                        t1 = s1; s1--;
                        while ( s1 > Buffer ) {
                                if ( *s1 == '<' ) break;
                                s1--;
                        }
                        t2 = s2;
                        while ( *t2 ) {
                                if ( *t2 == '>' ) break;
                                t2++;
                        }
                        if ( *s1 != '<' || *t2 != '>' ) {
                                MesPrint("&Illegal attempt to use ... operator");
                                return(-1);
                        }
                        s1++; s2++;                /* Pointers to the patterns */
                        nums = (int *)Malloc1((t1-s1)*2*(sizeof(int)+sizeof(UBYTE))
                                                        ,"Expand ...");
                        strngs = (UBYTE *)(nums + 2*(t1-s1));
                        n1 = s1; n2 = s2; ii = -1; i = 0;
                        s = strngs;                        
                        while ( n1 < t1 || n2 < t2 ) {
                                /* Check the next characters can be parsed as numbers including signs. */
                                if ( CanParseSignedNumber(n1) && CanParseSignedNumber(n2) ) {
                                        /*
                                         * Don't allow the cases that one has the sign and the other doesn't,
                                         * and the meaning changes without the sign. For example,
                                         *   <f(1)>+...+<f(3)>       Allowed
                                         *   <f(-2)>+...+<f(2)>      Allowed
                                         *   <f(x-2)>+...+<f(x+2)>   Allowed
                                         *   <f(x-2)>+...+<f(x2)>    Not allowed
                                         */
                                        int sign1 = IsSignChar(*n1);
                                        int sign2 = IsSignChar(*n2);
                                        int inword1 = s1 < n1 && IsAlphanumericChar(n1[-1]);
                                        int inword2 = s2 < n2 && IsAlphanumericChar(n2[-1]);
                                        if ( ( sign1 ^ sign2 ) && ( inword1 || inword2 ) ) break;  /* Not allowed. */
                                        if ( sign1 || sign2 ) {
                                                *s++ = '+';  /* Marker indicating we need the sign. */
                                        }
                                } else {
                                        /* If they are not numbers, they should be same. */
                                        if ( *n1 == *n2 ) { *s++ = *n1++; n2++; continue; }
                                        else break;
                                }
                                ParseSignedNumber(x1,n1)
                                ParseSignedNumber(x2,n2)
                                if ( x1 == x2 ) {
                                        if ( s != strngs && ( s[-1] == '+' || s[-1] == '-' ) ) {
                                                /* We need the sign. */
                                                s--;
                                                if ( x1 >= 0 ) {
                                                        *s++ = '+';
                                                }
                                        }
                                        s = NumCopy(x1, s);
                                }
                                else {
                                        nums[2*i] = x1; nums[2*i+1] = x2;
                                        i++; *s++ = 0;
                                }
                        }
                        if ( n1 < t1 || n2 < t2 ) {
                                MesPrint("&Improper use of ... operator.");
theend:                        M_free(nums,"Expand ...");
                                return(-1);
                        }
                        *s = 0;
                        if ( i == 0 ) ii = 0;
                        else {
                                ii = nums[0] - nums[1];
                                if ( ii < 0 ) ii = -ii;
                                for ( x1 = 1; x1 < i; x1++ ) {
                                        x2 = nums[2*x1]-nums[2*x1+1];
                                        if ( x2 < 0 ) x2 = -x2;
                                        if ( x2 != ii ) {
                                                MesPrint("&Improper synchronization of numbers in ... operator");
                                                goto theend;
                                        }
                                }
                        }
                        ii++;
/*
                        We have now proper syntax.
                        There are i+1 strings in strngs and i pairs of numbers
                        in nums. Each time a start value and a finish value.
                        We have ii steps. If ii <= 2, it will fit in the existing
                        allocation. But this is hardly useful.
                        We make a new allocation and copy from the old.
                        Compute space.
*/
                        x2 = s - strngs - i;  /* -1 for end-of-string and +1 for the operator*/
                        for ( i1 = 0; i1 < i; i1++ ) {
                                i2 = nums[2*i1];
                                x1 = nums[2*i1+1];
                                if ( i2 < 0 ) i2 = -i2;
                                if ( x1 < 0 ) x1 = -x1;
                                if ( x1 > i2 ) i2 = x1;
                                x1 = 2;
                                while ( i2 > 0 ) { i2 /= 10; x1++; }
                                x2 += x1;
                        }
                        x2 *= ii;        /* Space for the expanded string (a bit more) */
                        x2 += fullsize;
                        x2 += 5;                /* This will definitely hold everything */
                        x2 += sizeof(UBYTE *);
                        x2 = x2 - (x2 & (sizeof(UBYTE *)-1));

                        nBuffer = (UBYTE *)Malloc1(x2,"input buffer");
                        n1 = nBuffer; s = Buffer; s1--;
                        while ( s < s1 ) *n1++ = *s++;
/*
                        Solution of the special case that no comma was generated
                        due to the presence of < to start the pattern.
                        We get a comma when the word before ends in an alphanumeric
                        character, a _ or a ] and the word inside starts with an
                        alphanumeric character, a [ (or an _ (for future considerations))
*/
                        if ( ( ( n1 > nBuffer ) && ( ( FG.cTable[n1[-1]] <= 1 )
                        || ( n1[-1] == '_' ) || ( n1[-1] == ']' ) ) ) &&
                        ( ( FG.cTable[strngs[0]] <= 1 ) || ( strngs[0] == '[' )
                         || ( strngs[0] == '_' ) ) ) *n1++ = ',';

                        for ( i1 = 0; i1 < ii; i1++ ) {
                                s = strngs; while ( *s ) *n1++ = *s++;
                                for ( i2 = 0; i2 < i; i2++ ) {
                                        if ( n1 > nBuffer && IsSignChar(n1[-1]) ) {
                                                /* We need the sign of counters. */
                                                n1--;
                                                if ( nums[2*i2] >= 0 ) {
                                                        *n1++ = '+';
                                                }
                                        }
                                        n1 = NumCopy((WORD)(nums[2*i2]),n1);
                                        if ( nums[2*i2] > nums[2*i2+1] ) nums[2*i2]--;
                                        else nums[2*i2]++;
                                        s++; while ( *s ) *n1++ = *s++;
                                }
                                if ( ( i1 & 1 ) == 0 ) *n1++ = operator1;
                                else *n1++ = operator2;
                        }
                        n1--;        /* drop the trailing operator */
                        s = t2 + 1; n2 = n1;
/*
                        Similar extra comma
*/
                        if ( ( ( ( FG.cTable[n1[-1]] <= 1 )
                        || ( n1[-1] == '_' ) || ( n1[-1] == ']' ) ) ) &&
                        ( ( FG.cTable[s[0]] <= 1 ) || ( s[0] == '[' )
                         || ( s[0] == '_' ) ) ) *n1++ = ',';

                        while ( *s ) *n1++ = *s++;
                        *n1 = 0;
                        if ( par == 0 ) {
                                LONG nnn1 = n1-nBuffer;
                                LONG nnn2 = n2-nBuffer;
                                LONG nnn3;
                                while ( AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel] + x2 >= AC.iStop ) {
                                        LONG position = s-Buffer;
                                        LONG position2 = AC.iPointer - AC.iBuffer;
                                        UBYTE **ppp;
                                        ppp = &(AC.iBuffer); /* to avoid a compiler warning */
                                        if ( DoubleLList((VOID ***)ppp,&AC.iBufferSize
                                                ,sizeof(UBYTE),"statement buffer") ) {
                                                        Terminate(-1);
                                        }
                                        AC.iPointer = AC.iBuffer + position2;
                                        AC.iStop = AC.iBuffer + AC.iBufferSize-2;
                                        Buffer = AC.iBuffer+AP.PreAssignStack[AP.PreAssignLevel]; Stop = AC.iStop;
                                        s  = Buffer + position;
                                }
/*
                                This can be improved. We only have to start from the first term.
*/
                                for ( nnn3 = 0; nnn3 < nnn1; nnn3++ ) Buffer[nnn3] = nBuffer[nnn3];
                                Buffer[nnn3] = 0;
                                n1 = Buffer + nnn1;
                                n2 = Buffer + nnn2;
                                M_free(nBuffer,"input buffer");
                                M_free(nums,"Expand ...");
                        }
                        else { /* Comes here only inside a real preprocessor instruction */
                                AP.preStop = nBuffer + x2 - 2;
                                AP.pSize = x2;
                                M_free(AP.preStart,"input buffer");
                                M_free(nums,"Expand ...");
                                AP.preStart = nBuffer;
                                Buffer = AP.preStart; Stop = AP.preStop;
                        }
                        fullsize = n1 - Buffer;
                        s = n2;
                }
        }
        return(error);
}

/*
                 #] ExpandTripleDots : 
                 #[ FindKeyWord :
*/

KEYWORD *FindKeyWord(UBYTE *theword, KEYWORD *table, int size)
{
        int low,med,hi;
        UBYTE *s1, *s2;
        low = 0;
        hi = size-1;
        while ( hi >= low ) {
                med = (hi+low)/2;
                s1 = (UBYTE *)(table[med].name);
                s2 = theword;
                while ( *s1 && tolower(*s1) == tolower(*s2) ) { s1++; s2++; }
                if ( *s1 == 0 &&
/*[30apr2004 mt]:*/
/* The bug!:
                                FG.cTable[*s2] != 1 && FG.cTable[*s2] != 2
*/
                                FG.cTable[*s2] != 0 && FG.cTable[*s2] != 1
/*                ( *s2 == ' ' || *s2 == '\t' || *s2 == 0 || *s2 == ',' || *s2 == '(' ) */
                         )
                        return(table+med);
                if ( tolower(*s2) > tolower(*s1) ) low = med+1;
                else hi = med - 1;
        }
        return(0);
}

/*
                 #] FindKeyWord : 
                 #[ FindInKeyWord :
*/

KEYWORD *FindInKeyWord(UBYTE *theword, KEYWORD *table, int size)
{
        int i;
        UBYTE *s1, *s2;
        for ( i = 0; i < size; i++ ) {
                s1 = (UBYTE *)(table[i].name);
                s2 = theword;
                while ( *s1 && tolower(*s1) == tolower(*s2) ) { s1++; s2++; }
                if ( *s2 == 0 || *s2 == ' ' || *s2 == ',' || *s2 == '\t' )
                        return(table+i);
        }
        return(0);
}

/*
                 #] FindInKeyWord : 
                 #[ TheDefine :
*/

/**
 *  Preprocessor assignment. Possible arguments and values are treated and the
 *  new preprocessor variable is put into the name administration.
 *
 *  @param   s      Pointer to the character string following the preprocessor
 *                  command.
 *  @param   mode   Bitmask. 0-bit clear: always create a new name entry, 0-bit
 *                  set: try to redefine an existing name, 1-bit set: ignore
 *                  preprocessor if/switch status.
 *  @return         zero: no errors, negative number: errors.
 */
int TheDefine(UBYTE *s, int mode)
{
        UBYTE *name, *value, *valpoin, *args = 0, c;
        if ( ( mode & 2 ) == 0 ) {
                if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
                if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        }
        else { mode &= ~2; }
        name = s;
        if ( chartype[*s] != 0 ) goto illname;
        s++;
        while ( chartype[*s] <= 1 ) s++;
        value = s;
        while ( *s == ' ' || *s == '\t' ) s++;
        c = *s; *value = 0;
        if ( c == 0 ) {
                if ( PutPreVar(name,(UBYTE *)"1",0,mode) < 0 ) return(-1);
                return(0);
        }
        if ( c == '(' ) {        /* arguments. scan for correctness */
                s++; args = s;
                for (;;) {
                        if ( chartype[*s] != 0 ) goto illarg;
                        s++;
                        while ( chartype[*s] <= 1 ) s++;
                        while ( *s == ' ' || *s == '\t' ) s++;
                        if ( *s == ')' ) break;
                        if ( *s != ',' ) goto illargs;
                        s++;
                        while ( *s == ' ' || *s == '\t' ) s++;
                }
                *s++ = 0;
                while ( *s == ' ' || *s == '\t' ) s++;
                c = *s;
        }
        if ( c == '"' ) {
                s++; valpoin = value = s;
                while ( *s != '"' ) {
                        if ( *s == '\\' ) {
                                if ( s[1] == 'n' ) { *valpoin++ = LINEFEED; s += 2; }
                                else if ( s[1] == '"' ) { *valpoin++ = '"'; s += 2; }
                                else if ( s[1] == 0 ) goto illval;
                                else { *valpoin++ = *s++; *valpoin++ = *s++; }
                        }
                        else *valpoin++ = *s++;
                }
                *valpoin = 0;
                if ( PutPreVar(name,value,args,mode) < 0 ) return(-1);
        }
        else {
                MesPrint("@Illegal string for preprocessor variable %s. Forgotten double quotes (\") ?",name);
                return(-1);
        }
        return(0);
illname:;
        MesPrint("@Illegally formed name of preprocessor variable");
        return(-1);
illarg:;
        MesPrint("@Illegally formed name of argument of preprocessor definition");
        return(-1);
illargs:;
        MesPrint("@Illegally formed arguments of preprocessor definition");
        return(-1);
illval:;
        MesPrint("@Illegal valpoin for preprocessor variable %s",name);
        return(-1);
}

/*
                 #] TheDefine : 
                 #[ DoCommentChar :
*/

int DoCommentChar(UBYTE *s)
{
        UBYTE c;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == 0 || *s == '\n' ) {
                MesPrint("@No valid comment character specified");
                return(-1);
        }
        c = *s++;
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s != 0 && *s != '\n' ) {
                MesPrint("@Comment character should be a single valid character");
                return(-1);
        }
        AP.ComChar = c;
        return(0);
}

/*
                 #] DoCommentChar : 
                 #[ DoPreAssign :

                Routine assigns a 'value' to a $variable.
                Syntax: #assign
                        next line(s) a statement of the type
                        $name = expression;
                Note: at the moment of the assign there cannot be an 'open' statement.
*/

int DoPreAssign(UBYTE *s)
{
        int error = 0;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) {
                return(0);
        }
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) {
                return(0);
        }
        if ( *s ) {
                MesPrint("@Illegal characters in %#assign instruction");
                error = 1;
        }
        PUSHPREASSIGNLEVEL;
        AP.PreAssignFlag = 1;
/*
        if ( AP.PreContinuation ) {
                MesPrint("@Assign instructions cannot occur inside statements");
                MesPrint("@Missing ; ?");
                AP.PreContinuation = 0;
                error = 1;
        }
*/
        return(error);
}

/*
                 #] DoPreAssign : 
                 #[ DoDefine :
*/

int DoDefine(UBYTE *s)
{
        return(TheDefine(s,0));
}

/*
                 #] DoDefine : 
                 #[ DoRedefine :
*/

int DoRedefine(UBYTE *s)
{
        return(TheDefine(s,1));
}

/*
                 #] DoRedefine : 
                 #[ ClearMacro :

                Undefines the arguments of a macro after its use.
*/

int ClearMacro(UBYTE *name)
{
        int i;
        PREVAR *p;
        UBYTE *s;
        for ( i = NumPre-1, p = &(PreVar[NumPre-1]); i >= 0; i--, p-- ) {
                if ( StrCmp(name,p->name) == 0 ) break;
        }
        if ( i < 0 ) return(-1);
        if ( p->nargs <= 0 ) return(0);
        s = p->argnames;
        for ( i = 0; i < p->nargs; i++ ) {
                TheUndefine(s);
                while ( *s ) s++;
                s++;
        }
        return(0);
}

/*
                 #] ClearMacro : 
                 #[ TheUndefine :

                There is a complication here. If there are redefine statements
                they will be pointing at the wrong variable if their number is
                greater than the number of the variable we pop.
*/

int TheUndefine(UBYTE *name)
{
        int i, inum, error = 0;
        PREVAR *p;
        for ( i = NumPre-1, p = &(PreVar[NumPre-1]); i >= 0; i--, p-- ) {
                if ( StrCmp(name,p->name) == 0 ) {
                        M_free(p->name,"undefining PreVar");
                        NumPre--;
                        inum = i;
                        while ( i < NumPre ) {
                                p->name  = p[1].name;
                                p->value = p[1].value;
                                p++; i++;
                        }
                        p->name = 0; p->value = 0;
                        {
                                CBUF *CC = cbuf + AC.cbufnum;
                                int j, k;
                                for ( j = 1; j <= CC->numlhs; j++ ) {
                                        if ( CC->lhs[j][0] == TYPEREDEFPRE ) {
                                                if ( CC->lhs[j][2] > inum ) CC->lhs[j][2]--;
                                                else if ( CC->lhs[j][2] == inum ) {
                                                        for ( k = inum - 1; k >= 0; k-- )
                                                                if ( StrCmp(name, PreVar[k].name) == 0 ) break;
                                                        if ( k >= 0 ) CC->lhs[j][2] = k;
                                                        else {
                                                                MesPrint("@Conflict between undefining a preprocessor variable and a redefine statement");
                                                                error = 1;
                                                        }
                                                }
                                        }
                                }
#ifdef PARALLELCODE
                                for ( j = 0; j < AC.numpfirstnum; j++ ) {
                                        if ( AC.pfirstnum[j] > inum ) AC.pfirstnum[j]--;
                                        else if ( AC.pfirstnum[j] == inum ) {
                                                for ( k = inum - 1; k >= 0; k-- )
                                                        if ( StrCmp(name, PreVar[k].name) == 0 ) break;
                                                if ( k >= 0 ) AC.pfirstnum[j] = k;
                                        }
                                }
#endif
                        }
                        break;
                }
        }
        return(error);
}

/*
                 #] TheUndefine : 
                 #[ DoUndefine :
*/

int DoUndefine(UBYTE *s)
{
        UBYTE *name, *t;
        int error = 0, retval;
/*
        int i;
        PREVAR *p;
*/
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        name = s;
        if ( chartype[*s] != 0 ) goto illname;
        s++;
        while ( chartype[*s] <= 1 ) s++;
        t = s;
        if ( *s && *s != ' ' && *s != '\t' ) goto illname;
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s ) {
                MesPrint("@Undefine should just have a variable name");
                error = -1;
        }
        *t = 0;
        if ( ( retval = TheUndefine(name) ) != 0 ) {
                if ( error == 0 ) return(retval);
                if ( error > 0 ) error = retval;
        }
/*
        for ( i = NumPre-1, p = &(PreVar[NumPre-1]); i >= 0; i--, p-- ) {
                if ( StrCmp(name,p->name) == 0 ) {
                        M_free(p->name,"undefining PreVar");
                        NumPre--;
                        while ( i < NumPre ) {
                                p->name  = p[1].name;
                                p->value = p[1].value;
                                p++; i++;
                        }
                        p->name = 0; p->value = 0;
                        break;
                }
        }
*/
        return(error);
illname:;
        MesPrint("@Illegally formed name of preprocessor variable");
        return(-1);
}

/*
                 #] DoUndefine : 
                 #[ DoInclude :
*/

int DoInclude(UBYTE *s) { return(Include(s,FILESTREAM)); }

/*
                 #] DoInclude : 
                 #[ DoReverseInclude :
*/

int DoReverseInclude(UBYTE *s) { return(Include(s,REVERSEFILESTREAM)); }

/*
                 #] DoReverseInclude : 
                 #[ Include :
*/

int Include(UBYTE *s, int type)
{
        UBYTE *name = s, *fold, *t, c, c1 = 0, c2 = 0, c3 = 0;
        int str1offset, withnolist = AC.NoShowInput;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
    if ( *s == '-' || *s == '+' ) {
                if ( *s == '-' ) withnolist = 1;
                else             withnolist = 0;
                s++;
                while ( *s == ' ' || *s == '\t' ) s++;
                name = s;
        }
        if ( *s == '"' ) {
                while ( *s && *s != '"' ) {
                        if ( *s == '\\' ) s++;
                        s++;
                }
                t = s++;
        }
        else {
                while ( *s && *s != ' ' && *s != '\t' ) {
                        if ( *s == '\\' ) s++;
                        s++;
                }
                t = s;
        }
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == '#' ) {
                *t = 0;
                s++;
                while ( *s == ' ' || *s == '\t' ) s++;
                fold = s;
                if ( *s == 0 ) {
                        MesPrint("@Empty fold name");
                        return(-1);
                }
continue_fold:
                while ( *s && *s != ' ' && *s != '\t' ) {
                        if ( *s == '\\' ) s++;
                        s++;
                }
                t = s;
                while ( *s == ' ' || *s == '\t' ) s++;
                if ( *s ) {
                        /*
                         * A non-whitespace character is found. Continue parsing the fold.
                         */
                        goto continue_fold;
                }
        }
        else if ( *s == 0 ) {
                fold = 0;
        }
        else {
                MesPrint("@Improper syntax for file name");
                return(-1);
        }
        *t = 0;
        if ( fold ) {
                fold = strDup1(fold,"foldname");
        }
/*
        We have the name of the file in 'name' and the fold in 'fold' (or NULL)
*/
        if ( OpenStream(name,type,0,PRENOACTION) == 0 ) {
                if ( fold ) { M_free(fold,"foldname"); fold = 0; }
                return(-1);
        }
        if ( fold ) {
                LONG position = -1;
                int foldopen = 0;
                LONG linenum = 0, prevline = 0;
                name = strDup1(name,"name of include file");
                AC.CurrentStream->FoldName = strDup1(fold,"name of fold");
                AC.NoShowInput++;
                for(;;) {
                        c = GetFromStream(AC.CurrentStream);
                        if ( c == ENDOFSTREAM ) {
                                AC.CurrentStream = CloseStream(AC.CurrentStream);
                                goto nofold;
                        }
                        if ( c == AP.ComChar ) {
                                str1offset = AC.CurrentStream-AC.Streams;
                                LoadInstruction(1);
                                if ( AC.CurrentStream != str1offset+AC.Streams ) {
                                        c = ENDOFSTREAM;
                                }
                                else {
                                        t = AP.preStart;
                                        if ( t[2] == '#' && ( ( t[3] == '[' && !foldopen )
                                        || ( t[3] == ']' && foldopen ) ) ) {
                                                t += 4;
                                                while ( *t == ' ' || *t == '\t' ) t++;
                                                s = AC.CurrentStream->FoldName;
                                                while ( *s == *t ) { s++; t++; }
                                                if ( *s == 0 && ( *t == ' ' || *t == '\t'
                                                || *t == ':' ) ) {
                                                        while ( *t == ' ' || *t == '\t' ) t++;
                                                        if ( *t == ':' ) {
                                                                if ( foldopen == 0 ) {
                                                                        foldopen = 1;
                                                                        position = GetStreamPosition(AC.CurrentStream);
                                                                        linenum = AC.CurrentStream->linenumber;
                                                                        prevline = AC.CurrentStream->prevline;
                                                                        c3 = AC.CurrentStream->isnextchar;
                                                                        c1 = AC.CurrentStream->nextchar[0];
                                                                        c2 = AC.CurrentStream->nextchar[1];
                                                                }
                                                                else {
                                                                        foldopen = 0;
                                                                        PositionStream(AC.CurrentStream,position);
                                                                        AC.CurrentStream->linenumber = linenum;
                                                                        AC.CurrentStream->prevline = prevline;
                                                                        AC.CurrentStream->eqnum = 1;
                                                                        AC.NoShowInput--;
                                                                        AC.CurrentStream->isnextchar = c3;
                                                                        AC.CurrentStream->nextchar[0] = c1;
                                                                        AC.CurrentStream->nextchar[1] = c2;
                                                                        break;
                                                                }
                                                        }
                                                }
                                        }
                                }
                        }
                        else {
                                while ( c != LINEFEED && c != ENDOFSTREAM ) {
                                        c = GetFromStream(AC.CurrentStream);
                                        if ( c == ENDOFSTREAM ) {
                                                AC.CurrentStream = CloseStream(AC.CurrentStream);
                                                break;
                                        }
                                }
                        }
                        if ( c == ENDOFSTREAM ) {
nofold:
                                MesPrint("@Cannot find fold %s in file %s",fold,name);
                                UngetChar(c);
                                AC.NoShowInput--;
                                M_free(name,"name of include file");
                                Terminate(-1);
                        }
                }
                M_free(name,"name of include file");
        }
        AC.NoShowInput = withnolist;
        if ( fold ) { M_free(fold,"foldname"); fold = 0; }
        return(0);
}

/*
                 #] Include : 
                 #[ DoPreExchange :

                Exchanges the names of expressions or the contents of dollars
                Syntax:
                        #exchange expr1,expr2
                        #exchange $var1,$var2
*/

int DoPreExchange(UBYTE *s)
{
        int error = 0;
        UBYTE *s1, *s2;
        WORD num1, num2;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == ',' || *s == '\t' ) s++;
        if ( *s == '$' ) {
                s++; s1 = s; while ( FG.cTable[*s] <= 1 ) s++;
                if ( *s != ',' && *s != ' ' && *s != '\t' ) goto syntax;
                *s++ = 0;
                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                if ( *s != '$' ) goto syntax;
                s++; s2 = s; while ( FG.cTable[*s] <= 1 ) s++;
                if ( *s != 0 && *s != ';' ) goto syntax;
                *s = 0;
                if ( ( num1 = GetDollar(s1) ) <= 0 ) {
                        MesPrint("@$%s has not been defined (yet)",s1);
                        error = 1;
                }
                if ( ( num2 = GetDollar(s2) ) <= 0 ) {
                        MesPrint("@$%s has not been defined (yet)",s2);
                        error = 1;
                }
                if ( error == 0 ) {
                        ExchangeDollars((int)num1,(int)num2);
                }
        }
        else {
                s1 = s; s = SkipAName(s);
                if ( *s != ',' && *s != ' ' && *s != '\t' ) goto syntax;
                *s++ = 0;
                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                if ( FG.cTable[*s] != 0 && *s != '[' ) goto syntax;
                s2 = s; s = SkipAName(s);
                if ( *s != 0 && *s != ';' ) goto syntax;
                *s = 0;
            if ( GetName(AC.exprnames,s1,&num1,NOAUTO) != CEXPRESSION ) {
                        MesPrint("@%s is not an expression",s1);
                        error = 1;
                }
            if ( GetName(AC.exprnames,s2,&num2,NOAUTO) != CEXPRESSION ) {
                        MesPrint("@%s is not an expression",s2);
                        error = 1;
                }
                if ( error == 0 ) {
                        ExchangeExpressions((int)num1,(int)num2);
                }
        }
        return(error);
syntax:
        MesPrint("@Proper syntax: %#exchange expr1,expr2 or %#exchange $var1,$var2");
        return(1);
}

/*
                 #] DoPreExchange : 
                 #[ DoCall :
*/

int DoCall(UBYTE *s)
{
        UBYTE *t, *u, *v, *name, c, cp, *args1, *args2, *t1, *t2, *wild = 0;
        int bratype = 0, wildargs = 0, inwildargs = 0, nwildargs = 0;
        PROCEDURE *p;
        int streamoffset;
        int i, namesize, narg1, narg2, bralevel, numpre;
        LONG i1, i2;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
/*
        1:        Get the name of the procedure.
        2:        Locate the procedure.
*/
        name = s; s = EndOfToken(s); c = *s; *s = 0;
        for ( i = NumProcedures-1; i >= 0; i-- ) {
                if ( StrCmp(Procedures[i].name,name) == 0 ) break;
        }
        p = (PROCEDURE *)FromList(&AP.ProcList);
        if ( i < 0 ) {        /* Try to find a file */
                namesize = 0;
                t = name;
                while ( *t ) { t++; namesize++; }
                t = AP.procedureExtension;
                while ( *t ) { t++; namesize++; }
                t = p->name = (UBYTE *)Malloc1(namesize+2,"procedure");
                u = name;
                while ( *u ) *t++ = *u++;
                *t++ = '.';
                v = AP.procedureExtension;
                while ( *v ) *t++ = *v++;
                *t = 0;
                p->loadmode = 0;        /* buffer should be freed at end */
                p->p.buffer = LoadInputFile(p->name,PROCEDUREFILE);
                if ( p->p.buffer == 0 ) return(-1);
                t[-4] = 0;
        }
        else {
                p->p.buffer = Procedures[i].p.buffer;
                p->name = Procedures[i].name;
                p->loadmode = 1;
        }
        t = p->p.buffer;
        SKIPBLANKS(t)
        if ( *t++ != '#' ) goto wrongfile;
        SKIPBLANKS(t)
        t += 9;
        SKIPBLANKS(t)
        u = EndOfToken(t);
        cp = *u; *u = 0;
        if ( StrCmp(t,name) != 0 ) goto wrongfile;
        *u = cp;
        *s = c;
/*
        The pointer p points to the contents of the procedure (in memory)
        Now we have to match the arguments. u points to after the name
        in the 'file', s to after the name in the call statement.
*/
        bralevel = narg1 = narg2 = 0; args2 = u;
        SKIPBLANKS(u)
        if ( *u == '(' ) {
                u++; SKIPBLANKS(u)
                args2 = u;
                while ( *u != ')' ) {
                        if ( *u == '?' ) { wildargs++; u++; nwildargs = narg2+1; }
                        narg2++; u = EndOfToken(u); SKIPBLANKS(u)
                        if ( *u == ',' ) { u++; SKIPBLANKS(u) }
                        else if ( *u != ')' || ( wildargs > 1 ) ) {
                                MesPrint("@Illegal argument field in procedure %s",p->name);
                                return(-1);
                        }
                }
        }
        while ( *u != LINEFEED ) u++;
        SKIPBLANKS(s)
        args1 = s+1;
        if ( *s == '(' ) bratype = 1;
        do {
                if ( *s == '{' && bratype == 0 ) bralevel++;
                else if ( *s == '(' && bratype == 1 ) bralevel++;
                else if ( *s == '}' && bratype == 0 ) {
                        bralevel--;
                        if ( bralevel == 0 ) {
                                *s = 0; narg1++;
                                if ( wildargs && narg1 == nwildargs ) wild = s;
                        }
                }
                else if ( *s == ')' && bratype == 1 ) {
                        bralevel--;
                        if ( bralevel == 0 ) {
                                *s = 0; narg1++;
                                if ( wildargs && narg1 == nwildargs ) wild = s;
                        }
                }
                /*[12dec2003 mt]:*/
                /*else if ( *s == ',' || *s == '|' ) {*/
                else if (set_in(*s,AC.separators)) {/*Function set_in see in
                                                                                                                        file tools.c*/
                /*:[12dec2003 mt]*/
                        *s = 0; narg1++;
                        if ( wildargs && narg1 == nwildargs ) wild = s;
                }
                else if ( *s == '\\' ) s++;
                s++;
        } while ( bralevel > 0 );
        if ( wildargs && narg1 >= narg2-1 ) {
                inwildargs = narg1-narg2+1;
                if ( inwildargs == 0 ) nwildargs = 0;
                else {
                        while ( inwildargs > 1 ) {
                                *wild = ',';
                                while ( *wild ) wild++;
                                inwildargs--;
                        }
                }
        }
        else if ( narg1 != narg2 && ( narg2 != 0 || narg1 != 1 || *args1 != 0 ) ) {
                MesPrint("@Arguments of procedure %s are not matching",p->name);
                return(-1);
        }
        numpre = -NumPre-1;        /* For the stream */
        for ( i = 0; i < narg2; i++ ) {
                t = args2;
                if ( *t == '?' ) {
                        args2++;
                }
                if ( *t == '?' && inwildargs == 0 ) {
                        args2 = EndOfToken(args2); c = *args2; *args2 = 0;
                        if ( PutPreVar(t,(UBYTE *)"",0,0) < 0 ) return(-1);
                }
                else {
                        args2 = EndOfToken(args2); c = *args2; *args2 = 0;
                        t1 = t2 = args1;
                        while ( *t1 ) {
                                if ( *t1 == '\\' ) t1++;
                                if ( t1 != t2 ) *t2 = *t1;
                                t2++; t1++;
                        }
                        *t2 = 0;
                        if ( PutPreVar(t,args1,0,0) < 0 ) return(-1);
                        args1 = t1+1;                  /* Next argument */
                }
                *args2 = c; SKIPBLANKS(args2)  /* skip to next name */
                args2++; SKIPBLANKS(args2)
        }
        streamoffset = AC.CurrentStream - AC.Streams;
        args1 = AC.CurrentStream->name;
        AC.CurrentStream->name = p->name;
        i1 = AC.CurrentStream->linenumber;
        i2 = AC.CurrentStream->prevline;
        AC.CurrentStream->prevline   =
        AC.CurrentStream->linenumber = 2;
        OpenStream(u+1,PREREADSTREAM3,numpre,PRENOACTION);
        AC.Streams[streamoffset].name = args1;
        AC.Streams[streamoffset].linenumber = i1;
        AC.Streams[streamoffset].prevline   = i2;
        AddToPreTypes(PRETYPEPROCEDURE);
        return(0);
wrongfile:;
        if ( i < 0 ) MesPrint("@File %s is not a proper procedure",p->name);
        else MesPrint("!!!Internal error with procedure names: %s",name);
        return(-1);
}

/*
                 #] DoCall : 
                 #[ DoDebug :
*/

int DoDebug(UBYTE *s)
{
        int x;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        NeedNumber(x,s,nonumber)
        if ( x < 0 || x >(PREPROONLY
                                        | DUMPTOCOMPILER
                                        | DUMPOUTTERMS
                                        | DUMPINTERMS
                                        | DUMPTOSORT
                                        | DUMPTOPARALLEL
#ifdef WITHPTHREADS
                                        | THREADSDEBUG
#endif
                         ) ) goto nonumber;
        AP.PreDebug = 0;
        if ( ( x & PREPROONLY     ) != 0 ) AP.PreDebug |= PREPROONLY;     /* 1  */
        if ( ( x & DUMPTOCOMPILER ) != 0 ) AP.PreDebug |= DUMPTOCOMPILER; /* 2  */
        if ( ( x & DUMPOUTTERMS   ) != 0 ) AP.PreDebug |= DUMPOUTTERMS;   /* 4  */
        if ( ( x & DUMPINTERMS    ) != 0 ) AP.PreDebug |= DUMPINTERMS;    /* 8  */
        if ( ( x & DUMPTOSORT     ) != 0 ) AP.PreDebug |= DUMPTOSORT;     /* 16 */
        if ( ( x & DUMPTOPARALLEL ) != 0 ) AP.PreDebug |= DUMPTOPARALLEL; /* 32 */
#ifdef WITHPTHREADS
        if ( ( x & THREADSDEBUG   ) != 0 ) AP.PreDebug |= THREADSDEBUG;   /* 64 */
#endif
        return(0);
nonumber:
        MesPrint("@Illegal argument for debug instruction");
        return(1);
}

/*
                 #] DoDebug : 
                 #[ DoTerminate :
*/

int DoTerminate(UBYTE *s)
{
        int x;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( *s ) {
                NeedNumber(x,s,nonumber)
                Terminate(x);
        }
        else {
                Terminate(-1);
        }
        return(0);
nonumber:
        MesPrint("@Illegal argument for terminate instruction");
        return(1);
}

/*
                 #] DoTerminate : 
                 #[ DoContinueDo :
*/

int DoContinueDo(UBYTE *s)
{
        DOLOOP *loop;

        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);

        if ( NumDoLoops <= 0 ) {
                MesPrint("@%#continuedo without %#do");
                return(1);
        }

        loop = &(DoLoops[NumDoLoops-1]);
        AP.NumPreTypes = loop->NumPreTypes+1;
        AP.PreIfLevel = loop->PreIfLevel;
        AP.PreSwitchLevel = loop->PreSwitchLevel;

        return(DoEnddo(s));
}

/*
                 #] DoContinueDo :
                 #[ DoDo :

                The do loop has three varieties:
                #do i = num1,num2 [,num3]
                #do i = {string1,string2,....,stringn}
                        The | as separator is also allowed for backwards compatibility
                #do i = expression      One by one all terms of the expression
*/

int DoDo(UBYTE *s)
{
        GETIDENTITY
        UBYTE *t, c, *u, *uu;
        DOLOOP *loop;
        WORD expnum;
        LONG linenum  = AC.CurrentStream->linenumber;
        int oldNoShowInput = AC.NoShowInput, i, oldpreassignflag;

        if ( ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH )
        || ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) ) {
                if ( PreSkip((UBYTE *)"do",(UBYTE *)"enddo",1) ) return(-1);
                return(0);
        }

/*
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
*/
        AddToPreTypes(PRETYPEDO);
 
        loop = (DOLOOP *)FromList(&AP.LoopList);
        loop->firstdollar = loop->lastdollar = loop->incdollar = -1;
        loop->NumPreTypes = AP.NumPreTypes-1;
        loop->PreIfLevel = AP.PreIfLevel;
        loop->PreSwitchLevel = AP.PreSwitchLevel;
        AC.NoShowInput = 1;
        if ( PreLoad(&(loop->p),(UBYTE *)"do",(UBYTE *)"enddo",1,"doloop") ) return(-1);
        AC.NoShowInput = oldNoShowInput;
        loop->NoShowInput = AC.NoShowInput;
/*
        Get now the name. We have to take great care when the name is terminated!
*/
        s = loop->p.buffer + (s - AP.preStart);
        SKIPBLANKS(s)
        loop->name = s;
        if ( chartype[*s] != 0 ) goto illname;
        s++;
        while ( chartype[*s] <= 1 ) s++;
        t = s;
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s != '=' ) goto illdo;
        s++;
        while ( *s == ' ' || *s == '\t' ) s++;
        *t = 0;

        if ( *s == '{' ) {
                loop->type = LISTEDLOOP;
                s++; loop->vars = s;
                loop->lastnum = 0;
                while ( *s != '}' && *s != 0 ) {
                        if ( set_in(*s,AC.separators) ) { *s = 0; loop->lastnum++; }
                        else if ( *s == '\\' ) s++;
                        s++;
                }
                if ( *s == 0 ) goto illdo;
                *s++ = 0;
                loop->lastnum++;
                loop->firstnum = 0;
                loop->contents = s;
        }
        else if ( *s == '-' || *s == '+' || chartype[*s] == 1 || *s == '$' ) {
                loop->type = NUMERICALLOOP;
                t = s;
                while ( *s && *s != ',' ) s++;
                if ( *s == 0 ) goto illdo;
                if ( *t == '$' ) {
                        c = *s; *s = 0;
                        if ( GetName(AC.dollarnames,t+1,&loop->firstdollar,NOAUTO) != CDOLLAR ) {
                                MesPrint("@%s is undefined in first parameter in %#do instruction",t);
                                return(-1);
                        }
                        loop->firstnum = DolToLong(BHEAD loop->firstdollar);
                        if ( AN.ErrorInDollar ) {
                                MesPrint("@%s does not evaluate into a valid loop parameter",t);
                                return(-1);
                        }
                        *s++ = c;
                }
                else {
                        *s = '}';
                        if ( PreEval(t,&loop->firstnum) == 0 ) goto illdo;
                        *s++ = ',';
                }
                t = s;
                while ( *s && *s != ',' && *s != ';' && *s != LINEFEED ) s++;
                c = *s;
                if ( *t == '$' ) {
                        *s = 0;
                        if ( GetName(AC.dollarnames,t+1,&loop->lastdollar,NOAUTO) != CDOLLAR ) {
                                MesPrint("@%s is undefined in second parameter in %#do instruction",t);
                                return(-1);
                        }
                        loop->lastnum = DolToLong(BHEAD loop->lastdollar);
                        if ( AN.ErrorInDollar ) {
                                MesPrint("@%s does not evaluate into a valid loop parameter",t);
                                return(-1);
                        }
                        *s++ = c;
                }
                else {
                        *s = '}';
                        if ( PreEval(t,&loop->lastnum) == 0 ) goto illdo;
                        *s++ = c;
                }
                if ( c == ',' ) {
                        t = s;
                        while ( *s && *s != ';' && *s != LINEFEED ) s++;
                        if ( *t == '$' ) {
                                c = *s; *s = 0;
                                if ( GetName(AC.dollarnames,t+1,&loop->incdollar,NOAUTO) != CDOLLAR ) {
                                        MesPrint("@%s is undefined in third parameter in %#do instruction",t);
                                        return(-1);
                                }
                                loop->incnum = DolToLong(BHEAD loop->incdollar);
                                if ( AN.ErrorInDollar ) {
                                        MesPrint("@%s does not evaluate into a valid loop parameter",t);
                                        return(-1);
                                }
                                *s++ = c;
                        }
                        else {
                                c = *s; *s = '}';
                                if ( PreEval(t,&loop->incnum) == 0 ) goto illdo;
                                *s++ = c;
                        }
                }
                else loop->incnum = 1;
                loop->contents = s;
        }
        else if ( ( chartype[*s] == 0 ) || ( *s == '[' ) ) {
                int oldNumPotModdollars = NumPotModdollars;
#ifdef WITHMPI
                WORD oldRhsExprInModuleFlag = AC.RhsExprInModuleFlag;
                AC.RhsExprInModuleFlag = 0;
#endif
                t = s;
                if ( ( s = SkipAName(s) ) == 0 ) goto illdo;
                c = *s; *s = 0;
                if ( GetName(AC.exprnames,t,&expnum,NOAUTO) == CEXPRESSION ) {
                        loop->type = ONEEXPRESSION;
/*
                        We should remember the expression by name for when it gets
                        renumbered!!! If it gets deleted there will be a crash or at
                        least the loop terminates.
*/        
                        loop->vars = t;
                }
                else goto illdo;
                if ( c == ',' || c == '\t' || c == ';' ) { s++; }
                else if ( c != 0 && c != '\n' ) goto illdo;
                while ( *s == ',' || *s == '\t' || *s == ';' ) s++;
                if ( *s != 0 && *s != '\n' ) goto illdo;
                loop->firstnum = 0;
                s++;
                loop->contents = s;
                loop->incnum = 0;
/*
                Next determine size of statement and allocate space
*/
                while ( *t ) t++;
                i = t - loop->vars;
                t = loop->name;
                while ( *t ) { t++; i++; }
                i += 4;
                loop->dollarname = Malloc1((LONG)i,"do-loop instruction");
/*
                Construct the statement
*/
                u = loop->dollarname;
                *u++ = '$'; t = loop->name; while ( *t ) *u++ = *t++;
                *u++ = '_'; uu = u; *u++ = '='; t = loop->vars;
                while ( *t ) *u++ = *t++;
                *t = 0; *u = 0;
/*
                Compile and put in dollar variable.
                Note that we remember the dollar by name and that this name ends in _
*/
                oldpreassignflag = AP.PreAssignFlag;
                AP.PreAssignFlag = 2;
        CompileStatement(loop->dollarname);
                if ( CatchDollar(0) ) {
                        MesPrint("@Cannot load expression in do loop");
                        return(-1);
                }
                AP.PreAssignFlag = oldpreassignflag;
                NumPotModdollars = oldNumPotModdollars;
#ifdef WITHMPI
                AC.RhsExprInModuleFlag = oldRhsExprInModuleFlag;
#endif
                *uu = 0;
        }
        else goto illdo; /* Syntax problems */
        loop->errorsinloop = 0;
/*        loop->startlinenumber = linenum+1; 5-oct-2000 One too much? */
        loop->startlinenumber = linenum;
        PutPreVar(loop->name,(UBYTE *)"0",0,0);                        
        loop->firstloopcall = 1;
        return(DoEnddo(s));
illname:;
        MesPrint("@Improper name for do loop variable");
        return(-1);
illdo:;
        MesPrint("@Improper syntax in do loop instruction");
        return(-1);
}

/*
                 #] DoDo : 
                 #[ DoBreakDo :

                #breakdo [num]
                jumps out of num #do-loops (if there are that many) (default is 1)
*/

int DoBreakDo(UBYTE *s)
{
        DOLOOP *loop;
        WORD levels;

        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);

        if ( NumDoLoops <= 0 ) {
                MesPrint("@%#breakdo without %#do");
                return(1);
        }
/*
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPEDO ) { MessPreNesting(4); return(-1); }
*/
        while ( *s && ( *s == ',' || *s == ' ' || *s == '\t' ) ) s++;
        if ( *s == 0 ) {
                levels = 1;
        }
        else if ( FG.cTable[*s] == 1 ) {
                levels = 0;
                while ( *s >= '0' && *s <= '9' ) { levels = 10*levels + *s++ - '0'; }
                if ( *s != 0 ) goto improper;
        }
        else {
improper:
                MesPrint("@Improper syntax of %#breakdo instruction");
                return(1);
        }
        if ( levels > NumDoLoops ) {
                MesPrint("@Too many loop levels requested in %#breakdo instruction");
                Terminate(-1);
        }
        while ( levels > 0 ) {
                while ( AC.CurrentStream->type != PREREADSTREAM
                  && AC.CurrentStream->type != PREREADSTREAM2
                  && AC.CurrentStream->type != PREREADSTREAM3 ) {
                        AC.CurrentStream = CloseStream(AC.CurrentStream);
                }
                while ( AP.PreTypes[AP.NumPreTypes] != PRETYPEDO
                && AP.PreTypes[AP.NumPreTypes] != PRETYPEPROCEDURE ) AP.NumPreTypes--;
                if ( AC.CurrentStream->type == PREREADSTREAM3
                || AP.PreTypes[AP.NumPreTypes] == PRETYPEPROCEDURE ) {
                        MesPrint("@Trying to jump out of a procedure with a %#breakdo instruction");
                        Terminate(-1);
                }
                loop = &(DoLoops[NumDoLoops-1]);
                AP.NumPreTypes = loop->NumPreTypes;
                AP.PreIfLevel = loop->PreIfLevel;
                AP.PreSwitchLevel = loop->PreSwitchLevel;
/*
                AP.NumPreTypes--;
*/
                NumDoLoops--;
                DoUndefine(loop->name);
                M_free(loop->p.buffer,"loop->p.buffer");
                loop->firstloopcall = 0;

                AC.CurrentStream = CloseStream(AC.CurrentStream);
                levels--;
        }
        return(0);
}

/*
                 #] DoBreakDo : 
                 #[ DoElse :
*/

int DoElse(UBYTE *s)
{
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPEIF ) {
                if ( AP.PreIfLevel <= 0 ) MesPrint("@%#else without corresponding %#if");
                else MessPreNesting(1);
                return(-1);
        }
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        while ( *s == ' ' ) s++;
        if ( tolower(*s) == 'i' && tolower(s[1]) == 'f' && s[2]
                && FG.cTable[s[2]] > 1 && s[2] != '_' ) {
                s += 2;
                while ( *s == ' ' ) s++;
                return(DoElseif(s));
        }
        if ( AP.PreIfLevel <= 0 ) {
                MesPrint("@%#else without corresponding %#if");
                return(-1);
        }
        switch ( AP.PreIfStack[AP.PreIfLevel] ) {
                case EXECUTINGIF:
                        AP.PreIfStack[AP.PreIfLevel] = LOOKINGFORENDIF;
                        break;
                case LOOKINGFORELSE:
                        AP.PreIfStack[AP.PreIfLevel] = EXECUTINGIF;
                        break;
                case LOOKINGFORENDIF:
                        break;
        }
        return(0);
}

/*
                 #] DoElse : 
                 #[ DoElseif :
*/

int DoElseif(UBYTE *s)
{
        int condition;
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPEIF ) {
                if ( AP.PreIfLevel <= 0 ) MesPrint("@%#elseif without corresponding %#if");
                else MessPreNesting(2);
                return(-1);
        }
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfLevel <= 0 ) {
                MesPrint("@%#elseif without corresponding %#if");
                return(-1);
        }
        switch ( AP.PreIfStack[AP.PreIfLevel] ) {
                case EXECUTINGIF:
                        AP.PreIfStack[AP.PreIfLevel] = LOOKINGFORENDIF;
                        break;
                case LOOKINGFORELSE:
                        if ( ( condition = EvalPreIf(s) ) < 0 ) return(-1);
                        AP.PreIfStack[AP.PreIfLevel] = condition;
                        break;
                case LOOKINGFORENDIF:
                        break;
        }
        return(0);
}

/*
                 #] DoElseif : 
                 #[ DoEnddo :

                At the first call there is no stream yet.
                After that we have to close the stream and start a new one.
*/

int DoEnddo(UBYTE *s)
{
        GETIDENTITY
        DOLOOP *loop;
        UBYTE *t, *tt, *value, numstr[16];
        LONG xval;
        int xsign, retval;
        DUMMYUSE(s);
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
/*
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ||
                AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) {
                if ( AP.PreTypes[AP.NumPreTypes] == PRETYPEDO ) AP.NumPreTypes--;
                else { MessPreNesting(3); return(-1); }
                return(0);
        }
*/
        if ( NumDoLoops <= 0 ) {
                MesPrint("@%#enddo without %#do");
                return(1);
        }
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPEDO ) { MessPreNesting(4); return(-1); }
        loop = &(DoLoops[NumDoLoops-1]);
        if ( !loop->firstloopcall ) AC.CurrentStream = CloseStream(AC.CurrentStream);

        if ( loop->errorsinloop ) {
                MesPrint("++++Errors in Loop");
                goto finish;
        }
        if ( loop->type == LISTEDLOOP ) {
                if ( loop->firstnum >= loop->lastnum ) goto finish;
                loop->firstnum++;
                t = value = loop->vars;
                while ( *value ) value++;
                value++;
                loop->vars = value;
                value = tt = t;
                while ( *value ) {
                        if ( *value == '\\' ) value++;
                        *tt++ = *value++;
                } 
                *tt = 0;
                PutPreVar(loop->name,t,0,1);        /* We overwrite the definition */
        }
        else if ( loop->type == NUMERICALLOOP ) {

                if ( !loop->firstloopcall ) {
/*
                        Test whether the variable was changed inside the loop into
                        a different numerical value. If so, adjust.
*/
                        t = GetPreVar(loop->name,WITHOUTERROR);
                        if ( t ) {
                                value = t;
                                xsign = 1;
                                while ( *value && ( *value == ' '
                                                || *value == '-' || *value == '+' ) ) {
                                        if ( *value == '-' ) xsign = -xsign;
                                        value++;
                                }
                                t = value; xval = 0;
                                while ( *value >= '0' && *value <= '9' ) xval = 10*xval + *value++ - '0';
                                while ( *value && *value == ' ' ) value++;
                                if ( *value == 0 ) {
/*
                                        Now we may substitute the loopvalue.
*/
                                        if ( xsign < 0 ) xval = -xval;
                                        if ( loop->incdollar >= 0 ) {
                                                loop->incnum = DolToLong(BHEAD loop->incdollar);
                                                if ( AN.ErrorInDollar ) {
                                                        MesPrint("@%s does not evaluate into a valid third loop parameter",DOLLARNAME(Dollars,loop->incdollar));
                                                        return(-1);
                                                }
                                        }
                                        loop->firstnum = xval + loop->incnum;
                                }
                        }
                        if ( loop->lastdollar >= 0 ) {
                                loop->lastnum = DolToLong(BHEAD loop->lastdollar);
                                if ( AN.ErrorInDollar ) {
                                        MesPrint("@%s does not evaluate into a valid second loop parameter",DOLLARNAME(Dollars,loop->lastdollar));
                                        return(-1);
                                }
                        }
                }
                if ( ( loop->incnum > 0 && loop->firstnum > loop->lastnum )
                || ( loop->incnum < 0 && loop->firstnum < loop->lastnum ) ) goto finish;
                NumToStr(numstr,loop->firstnum);
                t = numstr;
                loop->firstnum += loop->incnum;
                PutPreVar(loop->name,t,0,1);        /* We overwrite the definition */
        }
        else if ( loop->type == ONEEXPRESSION ) {
/*
                Find the dollar expression
*/
                WORD numdollar = GetDollar(loop->dollarname+1);
                DOLLARS d = Dollars + numdollar;
                WORD *w, *dw, v, *ww;
                if ( (d->where) == 0 ) {
                        d->type = DOLUNDEFINED;
                        M_free(loop->dollarname,"do-loop instruction");
                        goto finish;
                }
                w = d->where + loop->incnum;
                if ( *w == 0 ) {
                        M_free(d->where,"dollar");
                        d->where = 0;
                        d->type = DOLUNDEFINED;
                        M_free(loop->dollarname,"do-loop instruction");
                        goto finish;
                }
                loop->incnum += *w;
/*
                Now the term has to be converted to text.
*/
                ww = w + *w; v = *ww; *ww = 0;
                dw = d->where; d->where = w;
                t = WriteDollarToBuffer(numdollar,1);
                d->where = dw; *ww = v;
                PutPreVar(loop->name,t,0,1);        /* We overwrite the definition */
                M_free(t,"dollar");
        }
        if ( loop->firstloopcall ) OpenStream(loop->contents,PREREADSTREAM2,0,PRENOACTION);
        else OpenStream(loop->contents,PREREADSTREAM,0,PRENOACTION);
        AC.CurrentStream->prevline   =
        AC.CurrentStream->linenumber = loop->startlinenumber;
        AC.CurrentStream->eqnum = 0;
        loop->firstloopcall = 0;
        return(0);
finish:;
        NumDoLoops--;
        retval = DoUndefine(loop->name);
        M_free(loop->p.buffer,"loop->p.buffer");
        loop->firstloopcall = 0;
        AP.NumPreTypes--;
        return(retval);
}

/*
                 #] DoEnddo : 
                 #[ DoEndif :
*/

int DoEndif(UBYTE *s)
{
        DUMMYUSE(s);
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPEIF ) {
                if ( AP.PreIfLevel <= 0 ) MesPrint("@%#endif without corresponding %#if");
                else MessPreNesting(5);
                return(-1);
        }
        AP.NumPreTypes--;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfLevel <= 0 ) {
                MesPrint("@%#endif without corresponding %#if");
                return(-1);
        }
        AP.PreIfLevel--;
        return(0);
}

/*
                 #] DoEndif : 
                 #[ DoEndprocedure :

                Action is simple: close the current stream if it is still
                the stream from which the statement came.
                Then pop the current procedure and all its local derivatives.
                if loadmode > 1 the procedure was defined locally.
*/

int DoEndprocedure(UBYTE *s)
{
        DUMMYUSE(s);
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPEPROCEDURE ) {
                MessPreNesting(6);
                return(-1);
        }
        AP.NumPreTypes--;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        AC.CurrentStream = CloseStream(AC.CurrentStream);
        do {
                NumProcedures--;
                if ( Procedures[NumProcedures].loadmode == 0 ) {
                        M_free(Procedures[NumProcedures].p.buffer,"procedures buffer");
                        M_free(Procedures[NumProcedures].name,"procedures name");
                }
        } while ( Procedures[NumProcedures].loadmode > 1 );
        return(0);
}

/*
                 #] DoEndprocedure : 
                 #[ DoIf :
*/

int DoIf(UBYTE *s)
{
        int condition;
        AddToPreTypes(PRETYPEIF);
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] == EXECUTINGIF ) {
                condition = EvalPreIf(s);
                if ( condition < 0 ) return(-1);
        }
        else condition = LOOKINGFORENDIF;
        if ( AP.PreIfLevel+1 >= AP.MaxPreIfLevel ) {
                int **ppp = &AP.PreIfStack; /* To avoid a compiler warning */
                if ( DoubleList((VOID ***)ppp,&AP.MaxPreIfLevel,sizeof(int),
                        "PreIfLevels") ) return(-1);
        }
        AP.PreIfStack[++AP.PreIfLevel] = condition;
        return(0);
}

/*
                 #] DoIf : 
                 #[ DoIfdef :
*/

int DoIfdef(UBYTE *s, int par)
{
        int condition;
        AddToPreTypes(PRETYPEIF);
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] == EXECUTINGIF ) {
                while ( *s == ' ' || *s == '\t' ) s++;
                if ( ( *s == 0 ) == ( par == 1 ) ) condition = LOOKINGFORELSE;
                else                               condition = EXECUTINGIF;
        }
        else condition = LOOKINGFORENDIF;
        if ( AP.PreIfLevel+1 >= AP.MaxPreIfLevel ) {
                int **ppp = &AP.PreIfStack; /* to avoid a compiler warning */
                if ( DoubleList((VOID ***)ppp,&AP.MaxPreIfLevel,sizeof(int),
                        "PreIfLevels") ) return(-1);
        }
        AP.PreIfStack[++AP.PreIfLevel] = condition;
        return(0);
}

/*
                 #] DoIfdef : 
                 #[ DoIfydef :
*/

int DoIfydef(UBYTE *s)
{
        return DoIfdef(s,1);
}

/*
                 #] DoIfydef : 
                 #[ DoIfndef :
*/

int DoIfndef(UBYTE *s)
{
        return DoIfdef(s,2);
}

/*
                 #] DoIfndef : 
                 #[ DoInside :

        #inside $var1,...,$varn
                statements without .sort
        #endinside

        executes the statements on the contents of the $ variables as if they
        are a module. The results are put back in the dollar variables.
        To do this right we need a struct with
                old compiler buffer
                list of numbers of dollars
                length of the list
                length of the array containing the list
        Because we need to compose statements, the statement buffer must be
        empty. This means that we have to test for that. Same at the end. We
        must have a completed statement.
*/

int DoInside(UBYTE *s)
{
        GETIDENTITY
        int numdol, error = 0;
        WORD *nb, newsize, i;
        UBYTE *name, c;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.PreInsideLevel != 0 ) {
                MesPrint("@Illegal nesting of %#inside/%#endinside instructions");
                return(-1);
        }
/*
        if ( AP.PreContinuation ) {
                error = -1;
                MesPrint("@%#inside cannot be inside a regular statement");
        }
*/
        PUSHPREASSIGNLEVEL
/*
        Now the dollars to do
*/
        AP.inside.numdollars = 0;
        for(;;) {
                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                if ( *s == 0 ) break;
                if ( *s != '$' ) {
                        MesPrint("@%#inside instruction can have only $ variables for parameters");
                        return(-1);
                }
                s++;
                name = s;
                while (chartype[*s] <= 1 ) s++;
                c = *s; *s = 0;
                if ( ( numdol = GetDollar(name) ) < 0 ) {
                        MesPrint("@%#inside: $%s has not (yet) been defined",name);
                        *s = c;
                        error = -1;
                }
                else {
                        *s = c;
                        if ( AP.inside.numdollars >= AP.inside.size ) {
                                if ( AP.inside.buffer == 0 ) newsize = 20;
                                else                         newsize = 2*AP.inside.size;
                                nb = (WORD *)Malloc1(newsize*sizeof(WORD),"insidebuffer");
                                if ( AP.inside.buffer ) {
                                        for ( i = 0; i < AP.inside.size; i++ ) nb[i] = AP.inside.buffer[i];
                                        M_free(AP.inside.buffer,"insidebuffer");
                                }
                                AP.inside.buffer = nb;
                                AP.inside.size = newsize;
                        }
                        AP.inside.buffer[AP.inside.numdollars++] = numdol;
                }
        }
/*
        We have to store the configuration of the compiler buffer, so that
        we know where to start executing and how to reset the buffer.
*/
        AP.inside.oldcompiletype = AC.compiletype;
        AP.inside.oldparallelflag = AC.mparallelflag;
        AP.inside.oldnumpotmoddollars = NumPotModdollars;
        AP.inside.oldcbuf = AC.cbufnum;
        AP.inside.oldrbuf = AM.rbufnum;
        AP.inside.oldcnumlhs = AR.Cnumlhs, 
        AddToPreTypes(PRETYPEINSIDE);
        AP.PreInsideLevel = 1;
        AC.cbufnum = AP.inside.inscbuf;
        AM.rbufnum = AP.inside.inscbuf;
        clearcbuf(AC.cbufnum);
        AC.compiletype = 0;
        AC.mparallelflag = PARALLELFLAG;
#ifdef WITHMPI
        /*
         * We use AC.RhsExprInModuleFlag, PotModdollars, and AC.pfirstnum
         * in order to check (1) whether there are expression names in RHS,
         * (2) which dollar variables can be modified, and (3) which
         * preprocessor variables can be redefined, in #inside.
         * We store the current values of them, and then reset them.
         */
        PF_StoreInsideInfo();
        AC.RhsExprInModuleFlag = 0;
        NumPotModdollars = 0;
        AC.numpfirstnum = 0;
#endif
        return(error);
}

/*
                 #] DoInside : 
                 #[ DoEndInside :
*/

int DoEndInside(UBYTE *s)
{
        GETIDENTITY
        WORD numdol, *oldworkpointer = AT.WorkPointer, *term, *t, j, i;
        DOLLARS d, nd;
        WORD oldbracketon = AR.BracketOn;
        WORD *oldcompresspointer = AR.CompressPointer;
        int oldmultithreaded = AS.MultiThreaded;
        /* int oldmparallelflag = AC.mparallelflag; */
        FILEHANDLE *f;
#ifdef WITHMPI
        int error = 0;
#endif
        DUMMYUSE(s);
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPEINSIDE ) {
                if ( AP.PreInsideLevel != 1 ) MesPrint("@%#endinside without corresponding %#inside");
                else MessPreNesting(11);
                return(-1);
        }
        AP.NumPreTypes--;
        if ( AP.PreInsideLevel != 1 ) {
                MesPrint("@%#endinside without corresponding %#inside");
                return(-1);
        }
        if ( AP.PreContinuation ) {
                MesPrint("@%#endinside: previous statement not terminated.");
                Terminate(-1);
        }
        AC.compiletype = AP.inside.oldcompiletype;
        AR.Cnumlhs = cbuf[AM.rbufnum].numlhs;
#ifdef WITHMPI
        /*
         * If the #inside...#endinside contains expressions in RHS, only the master executes it
         * and then broadcasts the result to the all slaves. If not, the all processes execute
         * it and in this case no MPI interactions are needed.
         */
        if ( PF.me == MASTER || !AC.RhsExprInModuleFlag ) {
#endif
        AR.BracketOn = 0;
        AS.MultiThreaded = 0;
        /* AC.mparallelflag = PARALLELFLAG; */
        if ( AR.CompressPointer == 0 ) AR.CompressPointer = AR.CompressBuffer;
        f = AR.infile; AR.infile = AR.outfile; AR.outfile = f;
/*
        Now we have to execute the statements on the proper dollars.
*/
        for ( i = 0; i < AP.inside.numdollars; i++ ) {
                numdol = AP.inside.buffer[i];
                nd = d = Dollars + numdol;
                if ( d->type != DOLZERO ) {
                        if ( d->type != DOLTERMS ) nd = DolToTerms(BHEAD numdol);
                        term = nd->where;
                        NewSort(BHEAD0);
                        NewSort(BHEAD0);
                        AR.MaxDum = AM.IndDum;
                        while ( *term ) {
                                t = oldworkpointer; j = *term;
                                NCOPY(t,term,j);
                                AT.WorkPointer = t;
                                AN.IndDum = AM.IndDum;
                                AR.CurDum = ReNumber(BHEAD term);
                                if ( Generator(BHEAD oldworkpointer,0) ) {
                                        MesPrint("@Called from %#endinside");
                                        MesPrint("@Evaluating variable $%s",DOLLARNAME(Dollars,numdol));
                                        Terminate(-1);
                                }
                        }
                        AT.WorkPointer = oldworkpointer;
                        CleanDollarFactors(d);
                        if ( d->where ) { M_free(d->where,"dollar contents"); d->where = 0; }
                        EndSort(BHEAD (WORD *)((VOID *)(&(d->where))),2);
                        LowerSortLevel();
                        term = d->where; while ( *term ) term += *term;
                        d->size = term - d->where;
                        if ( nd != d ) M_free(nd,"Copy of dollar variable");
                        if ( d->where[0] == 0 ) {
                                M_free(d->where,"dollar contents"); d->where = 0;
                                d->type = DOLZERO;
                        }
                }
        }
#ifdef WITHMPI
        }
        if ( AC.RhsExprInModuleFlag ) {
                /*
                 * The only master executed the statements in #inside.
                 * We need to broadcast the result to the all slaves.
                 */
                for ( i = 0; i < AP.inside.numdollars; i++ ) {
                        /*
                         * Mark $-variables specified in the #inside instruction as modified
                         * such that they will be broadcast.
                         */
                        AddPotModdollar(AP.inside.buffer[i]);
                }
                /* Now actual broadcast of modified variables. */
                if ( NumPotModdollars > 0 ) {
                        error = PF_BroadcastModifiedDollars();
                        if ( error ) goto cleanup;
                }
                if ( AC.numpfirstnum > 0 ) {
                        error = PF_BroadcastRedefinedPreVars();
                        if ( error ) goto cleanup;
                }
        }
cleanup:
#endif
        f = AR.infile; AR.infile = AR.outfile; AR.outfile = f;
        AC.cbufnum = AP.inside.oldcbuf;
        AM.rbufnum = AP.inside.oldrbuf;
        AR.Cnumlhs = AP.inside.oldcnumlhs;
        AR.BracketOn = oldbracketon;
        AP.PreInsideLevel = 0;
        AR.CompressPointer = oldcompresspointer;
        AS.MultiThreaded = oldmultithreaded;
        AC.mparallelflag = AP.inside.oldparallelflag;
        NumPotModdollars = AP.inside.oldnumpotmoddollars;
        POPPREASSIGNLEVEL
#ifdef WITHMPI
        PF_RestoreInsideInfo();
        if ( error ) return error;
#endif
        return(0);
}

/*
                 #] DoEndInside : 
                 #[ DoMessage :
*/

int DoMessage(UBYTE *s)
{
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        MesPrint("~~~%s",s);
        return(0);
}

/*
                 #] DoMessage : 
                 #[ DoPipe :
*/

int DoPipe(UBYTE *s)
{
#ifndef WITHPIPE
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
#ifdef WITHPIPE
        FLUSHCONSOLE;
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( OpenStream(s,PIPESTREAM,0,PRENOACTION) == 0 ) return(-1);
        return(0);
#else
        Error0("Pipes not implemented on this computer/system");
        return(-1);
#endif
}

/*
                 #] DoPipe : 
                 #[ DoPrcExtension :
*/

int DoPrcExtension(UBYTE *s)
{
        UBYTE *t, *u, c;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == 0 || *s == '\n' ) {
                MesPrint("@No valid procedure extension specified");
                return(-1);
        }
        if ( FG.cTable[*s] != 0 ) {
                MesPrint("@Procedure extension should be a string starting with an alphabetic character. No whitespace.");
                return(-1);
        }
        t = s;
        while ( *s && *s != '\n' && *s != ' ' && *s != '\t' ) s++;
        u = s;
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s != 0 && *s != '\n' ) {
                MesPrint("@Too many parameters in ProcedureExtension instruction");
                return(-1);
        }
        c = *u; *u = 0;
        if ( AP.procedureExtension ) M_free(AP.procedureExtension,"ProcedureExtension");
        AP.procedureExtension = strDup1(t,"ProcedureExtension");
        *u = c;
        return(0);
}

/*
                 #] DoPrcExtension : 
                 #[ DoPreOut :
*/

int DoPreOut(UBYTE *s)
{
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( tolower(*s) == 'o' ) {
                if ( tolower(s[1]) == 'n' && s[2] == 0 ) {
                        AP.PreOut = 1;
                        return(0);
                }
                if ( tolower(s[1]) == 'f' && tolower(s[2]) == 'f' && s[3] == 0 ) {
                        AP.PreOut = 0;
                        return(0);
                }
        }
        MesPrint("@Illegal option in PreOut instruction");
        return(-1);
}

/*
                 #] DoPreOut : 
                 #[ DoPrePrintTimes :
*/

int DoPrePrintTimes(UBYTE *s)
{
        DUMMYUSE(s);
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        PrintRunningTime();
        return(0);
}

/*
                 #] DoPrePrintTimes : 
                #[ DoPreSortReallocate :
*/

int DoPreSortReallocate(UBYTE *s)
{
        DUMMYUSE(s);
        if ( AC.SortReallocateFlag == 0 ) {
                /* Currently off, so set to 2. Then the reallocation code knows the flag was
                   set here, since "On sortreallocate;" sets it to 1. */
                AC.SortReallocateFlag = 2;
        }
        /* If the flag is already on, do nothing. */
        return(0);
}

/*
                #] DoPreSortReallocate :
                 #[ DoPreAppend :

                Syntax:
                #append <filename>
*/

int DoPreAppend(UBYTE *s)
{
        UBYTE *name, *to;

        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
/*
        Determine where to write
*/
        if ( *s == '<' ) {
                s++;
                name = to = s;
                while ( *s && *s != '>' ) {
                        if ( *s == '\\' ) s++;
                        *to++ = *s++;
                }
                if ( *s == 0 ) {
                        MesPrint("@Improper termination of filename");
                        return(-1);
                }
                s++;
                *to = 0;
                if ( *name ) { GetAppendChannel((char *)name); }
                else goto improper;
        }
        else {
improper:
                MesPrint("@Proper syntax is: %#append <filename>");
                return(-1);
        }
        return(0);
}

/*
                 #] DoPreAppend : 
                 #[ DoPreCreate :

                Syntax:
                #create <filename>
*/

int DoPreCreate(UBYTE *s)
{
        UBYTE *name, *to;

        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
/*
        Determine where to write
*/
        if ( *s == '<' ) {
                s++;
                name = to = s;
                while ( *s && *s != '>' ) {
                        if ( *s == '\\' ) s++;
                        *to++ = *s++;
                }
                if ( *s == 0 ) {
                        MesPrint("@Improper termination of filename");
                        return(-1);
                }
                s++;
                *to = 0;
                if ( *name ) { GetChannel((char *)name,0); }
                else goto improper;
        }
        else {
improper:
                MesPrint("@Proper syntax is: %#create <filename>");
                return(-1);
        }
        return(0);
}

/*
                 #] DoPreCreate : 
                 #[ DoPreRemove :
*/

int DoPreRemove(UBYTE *s)
{
        UBYTE *name, *to;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == '<' ) { s++; }
        else {
                MesPrint("@Proper syntax is: %#remove <filename>");
                return(-1);
        }
        name = to = s;
        while ( *s && *s != '>' ) {
                if ( *s == '\\' ) s++;
                *to++ = *s++;
        }
        if ( *s == 0 ) {
                MesPrint("@Improper filename");
                return(-1);
        }
        s++;
        *to = 0;
        CloseChannel((char *)name);
        remove((char *)name);
        return(0);
}

/*
                 #] DoPreRemove : 
                 #[ DoPreClose :
*/

int DoPreClose(UBYTE *s)
{
        UBYTE *name, *to;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == '<' ) { s++; }
        else {
                MesPrint("@Proper syntax is: %#close <filename>");
                return(-1);
        }
        name = to = s;
        while ( *s && *s != '>' ) {
                if ( *s == '\\' ) s++;
                *to++ = *s++;
        }
        if ( *s == 0 ) {
                MesPrint("@Improper filename");
                return(-1);
        }
        s++;
        *to = 0;
        return(CloseChannel((char *)name));
}

/*
                 #] DoPreClose : 
                 #[ DoPreWrite :

                Syntax:
                #write [<filename>] "formatstring" [,objects]
                The format string can contain the following special objects/codes
                \n  newline
                \t  tab
                \!        if last entry in string: no linefeed at end
                \b        put \ in output
                %$  $-variable (to be found among the objects)
                %e  expression (name to be found among the objects)
                %E  expression without ; (name to be found among the objects)
                %s        string (to be found among the objects) (with or without "")
                %S        subterms (see PrintSubtermList)
*/

int DoPreWrite(UBYTE *s)
{
        HANDLERS h;

        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);

#ifdef WITHMPI
        if ( PF.me != MASTER ) return 0;
#endif

        h.oldsilent    = AM.silent;
        h.newlogonly   = h.oldlogonly = AM.FileOnlyFlag;
        h.newhandle    = h.oldhandle  = AC.LogHandle;
        h.oldprinttype = AO.PrintType;
   
        while ( *s == ' ' || *s == '\t' ) s++;
/*
        Determine where to write
*/
        if( (s=defineChannel(s,&h))==0 ) return(-1);

        return(writeToChannel(WRITEOUT,s,&h));
}

/*
                 #] DoPreWrite : 
                 #[ DoProcedure :

                We have to read this procedure into a buffer.
                The only complications are:
                1: we have to seek through the file to do this efficiently
                   the file operations under VMS cannot do this properly
                   (unless we use the proper ANSI structs?)
                   This is the reason why we read whole input files under VMS.
                2: what to do when the same name is used twice.
                Note that we have to do the reading without substitution of
                preprocessor variables.
*/

int DoProcedure(UBYTE *s)
{
        UBYTE c;
        PROCEDURE *p;
        LONG i;
        if ( ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH )
        || ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) ) {
                if ( PreSkip((UBYTE *)"procedure",(UBYTE *)"endprocedure",1) ) return(-1);
                return(0);
        }
        p = (PROCEDURE *)FromList(&AP.ProcList);
        if ( PreLoad(&(p->p),(UBYTE *)"procedure",(UBYTE *)"endprocedure"
                ,1,(char *)"procedure") ) return(-1);

        p->loadmode = 2;
        s = p->p.buffer + 10;
        while ( *s == ' ' || *s == LINEFEED ) s++;
        if ( chartype[*s] ) {
                MesPrint("@Illegal name for procedure");
                return(-1);
        }
        p->name = s++;
        while ( chartype[*s] == 0 || chartype[*s] == 1 ) s++;
        c = *s; *s = 0;
        p->name = strDup1(p->name,"procedure");
        *s = c;
/*
        Check for double names
*/
        for ( i = NumProcedures-2; i >= 0; i-- ) {
                if ( StrCmp(Procedures[i].name,p->name) == 0 ) {
                        Error1("Multiple occurrence of procedure name ",p->name);
                }
        }
        return(0);
}

/*
                 #] DoProcedure : 
                 #[ DoPreBreak :
*/

int DoPreBreak(UBYTE *s)
{
        DUMMYUSE(s);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPESWITCH ) {
                if ( AP.PreSwitchLevel <= 0 )
                         MesPrint("@Break without corresponding Switch");
                else MessPreNesting(7);
                return(-1);
        }
        if ( AP.PreSwitchLevel <= 0 ) {
                MesPrint("@Break without corresponding Switch");
                return(-1);
        }
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] == EXECUTINGPRESWITCH )
                AP.PreSwitchModes[AP.PreSwitchLevel] = SEARCHINGPREENDSWITCH;
        return(0);
}

/*
                 #] DoPreBreak : 
                 #[ DoPreCase :
*/

int DoPreCase(UBYTE *s)
{
        UBYTE *t;
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPESWITCH ) {
                if ( AP.PreSwitchLevel <= 0 )
                         MesPrint("@Case without corresponding Switch");
                else MessPreNesting(8);
                return(-1);
        }
        if ( AP.PreSwitchLevel <= 0 ) {
                MesPrint("@Case without corresponding Switch");
                return(-1);
        }
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != SEARCHINGPRECASE ) return(0);

        SKIPBLANKS(s)
        t = s;
        while ( *s ) { if ( *s == '\\' ) s++; s++; }
        while ( s > t && ( s[-1] == ' ' || s[-1] == '\t' ) && s[-2] != '\\' ) {
                if ( s[-2] == '\\' ) s--;
                s--;
        }
        if ( *t == '"' && s > t+1 && s[-1] == '"' && s[-2] != '\\' ) {
                t++; s--; *s = 0;
        }
        else *s = 0;
        s = AP.PreSwitchStrings[AP.PreSwitchLevel];
        while ( *t == *s && *t ) { s++; t++; }
        if ( *t || *s ) return(0);        /* case did not match */
        AP.PreSwitchModes[AP.PreSwitchLevel] = EXECUTINGPRESWITCH;
        return(0);
}

/*
                 #] DoPreCase : 
                 #[ DoPreDefault :
*/

int DoPreDefault(UBYTE *s)
{
        DUMMYUSE(s);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPESWITCH ) {
                if ( AP.PreSwitchLevel <= 0 )
                         MesPrint("@Default without corresponding Switch");
                else MessPreNesting(9);
                return(-1);
        }
        if ( AP.PreSwitchLevel <= 0 ) {
                MesPrint("@Default without corresponding Switch");
                return(-1);
        }
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != SEARCHINGPRECASE ) return(0);
        AP.PreSwitchModes[AP.PreSwitchLevel] = EXECUTINGPRESWITCH;
        return(0);
}

/*
                 #] DoPreDefault : 
                 #[ DoPreEndSwitch :
*/

int DoPreEndSwitch(UBYTE *s)
{
        DUMMYUSE(s);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.PreTypes[AP.NumPreTypes] != PRETYPESWITCH ) {
                if ( AP.PreSwitchLevel <= 0 )
                         MesPrint("@EndSwitch without corresponding Switch");
                else MessPreNesting(10);
                return(-1);
        }
        AP.NumPreTypes--;
        if ( AP.PreSwitchLevel <= 0 ) {
                MesPrint("@EndSwitch without corresponding Switch");
                return(-1);
        }
        M_free(AP.PreSwitchStrings[AP.PreSwitchLevel--],"pre switch string");
        return(0);
}

/*
                 #] DoPreEndSwitch : 
                 #[ DoPreSwitch :

                There should be a string after this.
                We have to store it somewhere.
*/

int DoPreSwitch(UBYTE *s)
{
        UBYTE *t, *switchstring, **newstrings;
        int newnum, i, *newmodes;
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        SKIPBLANKS(s)
        t = s;
        while ( *s ) { if ( *s == '\\' ) s++; s++; }
        while ( s > t && ( s[-1] == ' ' || s[-1] == '\t' ) && s[-2] != '\\' ) {
                if ( s[-2] == '\\' ) s--;
                s--;
        }
        if ( *t == '"' && s > t+1 && s[-1] == '"' && s[-2] != '\\' ) {
                t++; s--; *s = 0;
        }
        else *s = 0;
        switchstring = (UBYTE *)Malloc1((s-t)+1,"case string");
        s = switchstring;
        while ( *t ) {
                if ( *t == '\\' ) t++;
                *s++ = *t++;
        }
        *s = 0;
        if ( AP.PreSwitchLevel >= AP.NumPreSwitchStrings ) {
                newnum = 2*AP.NumPreSwitchStrings;
                newstrings = (UBYTE **)Malloc1(sizeof(UBYTE *)*(newnum+1),"case strings");
                newmodes   = (int *)Malloc1(sizeof(int)*(newnum+1),"case strings");
                for ( i = 0; i < AP.NumPreSwitchStrings; i++ )
                        newstrings[i] = AP.PreSwitchStrings[i];
                M_free(AP.PreSwitchStrings,"AP.PreSwitchStrings");
                for ( i = 0; i <= AP.NumPreSwitchStrings; i++ )
                        newmodes[i] = AP.PreSwitchModes[i];
                M_free(AP.PreSwitchModes,"AP.PreSwitchModes");
                AP.PreSwitchStrings = newstrings;
                AP.PreSwitchModes   = newmodes;
                AP.NumPreSwitchStrings = newnum;
        }
        AP.PreSwitchStrings[++AP.PreSwitchLevel] = switchstring;
        if ( ( AP.PreSwitchLevel > 1 )
         && ( AP.PreSwitchModes[AP.PreSwitchLevel-1] != EXECUTINGPRESWITCH ) )
                AP.PreSwitchModes[AP.PreSwitchLevel] = SEARCHINGPREENDSWITCH;
        else
                AP.PreSwitchModes[AP.PreSwitchLevel] = SEARCHINGPRECASE;
        AddToPreTypes(PRETYPESWITCH);
        return(0);
}

/*
                 #] DoPreSwitch : 
                 #[ DoPreShow :

                Print the contents of the preprocessor variables
*/

int DoPreShow(UBYTE *s)
{
        int i;
        UBYTE *name, c;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == 0 ) {
                MesPrint("%#The preprocessor variables:");
                for ( i = 0; i < NumPre; i++ ) {
                        MesPrint("%d: %s = \"%s\"",i,PreVar[i].name,PreVar[i].value);
                }
        }
        else {
                while ( *s ) {
                        name = s; while ( *s && *s != ' ' && *s != '\t' && *s != ',' ) s++;
                        c = *s; *s = 0;
                        for ( i = 0; i < NumPre; i++ ) {
                                if ( StrCmp(PreVar[i].name,name) == 0 )
                                        MesPrint("%d: %s = \"%s\"",i,PreVar[i].name,PreVar[i].value);
                        }
                        *s = c;
                        while ( *s == ' ' || *s == '\t' ) s++;
                }
        }
        return(0);
}

/*
                 #] DoPreShow : 
                 #[ DoSystem :
*/

/*
 * A macro for translating the contents of `x' into a string after expanding.
 */
#define STRINGIFY(x)  STRINGIFY__(x)
#define STRINGIFY__(x) #x

int DoSystem(UBYTE *s)
{
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);
#ifdef WITHSYSTEM
        FLUSHCONSOLE;
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == '-' && s[1] == 'e' ) {
                LONG err;
                UBYTE str[24];
                s += 2;
                if ( *s != ' ' ) {
                        MesPrint("@Syntax error in #system command.");
                        return(-1);
                }
                while ( *s == ' ' || *s == '\t' ) s++;
                err = system((char *)s);
                NumToStr(str,err);
                PutPreVar((UBYTE *)"SYSTEMERROR_",str,0,1);
        }
        else if ( system((char *)s) ) {
                MesPrint("@System call returned with error condition");
                Terminate(-1);
        }
        return(0);
#else
        Error0("External programs not implemented on this computer/system");
        return(-1);
#endif
}

/*
                 #] DoSystem : 
                 #[ PreLoad :

                Loads a loop or procedure into a special buffer.
                Note: The current instruction is already in the preStart buffer
*/

int PreLoad(PRELOAD *p, UBYTE *start, UBYTE *stop, int mode, char *message)
{
        UBYTE *s, *t, *top, *newbuffer, c;
        LONG i, ppsize, linenum = AC.CurrentStream->linenumber;
        int size1, size2, level, com=0, last=1, strng = 0;
        p->size = AP.pSize;
        p->buffer = (UBYTE *)Malloc1(p->size+1,message);
        top = p->buffer + p->size - 2;
        t = p->buffer; *t++ = '#';
        s = start; size1 = size2 = 0;
        while ( *s ) { s++; size1++; }
        s = stop; while ( *s ) { s++; size2++; }
        s = AP.preStart; while ( *s ) *t++ = *s++; *t++ = LINEFEED;
        level = 1;
        i = 100;
        for (;;) {
                c = GetInput();
                if ( c == ENDOFINPUT ) {
                        MesPrint("@Missing %#%s, Should match line %l",stop,linenum);
                        return(-1);
                }
                if ( c == AP.ComChar && last == 1 ) com = 1;
                if ( c == LINEFEED ) { last = 1; com = 0; }
                else last = 0;

                if ( ( c == '"' ) && ( com == 0 ) ) { strng ^= 1; }

                if ( ( c == '#' ) && ( com == 0 ) ) i = 0;
                else i++;

                if ( t >= top ) {
                        ppsize = t - p->buffer;
                        p->size *= 2;
                        newbuffer = (UBYTE *)Malloc1(p->size,message);
                        t = newbuffer; s = p->buffer;
                        while ( --ppsize >= 0 ) *t++ = *s++;
                        M_free(p->buffer,"loading do loop");
                        p->buffer = newbuffer;
                        top = p->buffer + p->size - 2;
                }
                *t++ = c;
                if ( strng == 0 ) {
                  if ( ( i == size2 ) && ( com == 0 ) ) {
                        *t = 0;
                        if ( StrICmp(t-size2,(UBYTE *)(stop)) == 0 ) {
                                while ( ( c = GetInput() ) != LINEFEED && c != ENDOFINPUT ) {}
                                level--;
                                if ( level <= 0 ) break;
                                if ( c == ENDOFINPUT ) Error1("Missing #",stop);
                                *t++ = LINEFEED; *t = 0; last = 1;
                        }
                  }
                  if ( ( i == size1 ) && mode && ( com == 0 ) ) {
                        *t = 0;
                        if ( StrICmp(t-size1,(UBYTE *)(start)) == 0 ) {
/*
                                while ( ( c = GetInput() ) != LINEFEED && c != ENDOFINPUT ) {}
                                if ( c == ENDOFINPUT ) Error1("Missing #",stop);
*/
                                level++;
                        }
                  }
                  if ( i == 1 && t[-2] == LINEFEED ) {
                        if ( c == '-' )      AC.NoShowInput = 1;
                        else if ( c == '+' ) AC.NoShowInput = 0;
                  }
                }
        }
        *t++ = LINEFEED;
        *t = 0;
        return(0);
}

/*
                 #] PreLoad : 
                 #[ PreSkip :

                Skips a loop or procedure.
                Note: The current instruction is already in the preStart buffer
*/

#define SKIPBUFSIZE 20

int PreSkip(UBYTE *start, UBYTE *stop, int mode)
{
        UBYTE *s, *t, buffer[SKIPBUFSIZE+2], c;
        LONG i, linenum = AC.CurrentStream->linenumber;
        int size1, size2, level, com=0, last=1;

        t = buffer; *t++ = '#';
        s = start; size1 = size2 = 0;
        while ( *s ) { s++; size1++; }
        s = stop; while ( *s ) { s++; size2++; }
        level = 1;
        i = 0;
        for (;;) {
                c = GetInput();
                if ( c == ENDOFINPUT ) {
                        MesPrint("@Missing %#%s, Should match line %l",stop,linenum);
                        return(-1);
                }
                if ( c == AP.ComChar && last == 1 ) com = 1;
                if ( c == LINEFEED ) { last = 1; com = 0; i = 0; t = buffer; }
                else last = 0;
                if ( ( c == '#' ) && ( com == 0 ) ) { i = 0; t = buffer; }
                else i++;

                if ( i < SKIPBUFSIZE ) *t++ = c;
                if ( ( i == size2 ) && ( com == 0 ) ) {
                        *t = 0;
                        if ( StrICmp(t-size2,(UBYTE *)(stop)) == 0 ) {
                                while ( ( c = GetInput() ) != LINEFEED && c != ENDOFINPUT ) {}
                                level--;
                                if ( level <= 0 ) {
                                        pushbackchar = LINEFEED;
                                        break;
                                }
                                if ( c == ENDOFINPUT ) Error1("Missing #",stop);
                                i = 0; t = buffer;
                        }
                }
                if ( ( i == size1 ) && mode && ( com == 0 ) ) {
                        *t = 0;
                        if ( StrICmp(t-size1,(UBYTE *)(start)) == 0 ) {
                                while ( ( c = GetInput() ) != LINEFEED && c != ENDOFINPUT ) {}
                                level++;
                                i = 0; t = buffer;
                        }
                }
        }
        return(0);
}

/*
                 #] PreSkip : 
                 #[ StartPrepro :
*/

VOID StartPrepro(VOID)
{
        int **ppp;
        AP.MaxPreIfLevel = 2;
        ppp = &AP.PreIfStack;
        if ( DoubleList((VOID ***)ppp,&AP.MaxPreIfLevel,sizeof(int),
                        "PreIfLevels") ) Terminate(-1);
        AP.PreIfLevel = 0; AP.PreIfStack[0] = EXECUTINGIF;

        AP.NumPreSwitchStrings = 10;
        AP.PreSwitchStrings = (UBYTE **)Malloc1(sizeof(UBYTE *)*
                                                                (AP.NumPreSwitchStrings+1),"case strings");
        AP.PreSwitchModes   = (int *)Malloc1(sizeof(int)*
                                                                (AP.NumPreSwitchStrings+1),"case strings");
        AP.PreSwitchModes[0] = EXECUTINGPRESWITCH;
        AP.PreSwitchLevel = 0;
}

/*
                 #] StartPrepro : 
                 #[ EvalPreIf :

                Evaluates the condition in an if instruction.
                The return value is EXECUTINGIF if the condition is true.
                If it is false the returnvalue is LOOKINGFORELSE.
                An error gives a return value of -1
*/

int EvalPreIf(UBYTE *s)
{
        UBYTE *t, *u;
        int val;
        t = s;
        while ( *t ) t++;
        *t++ = ')';
        *t = 0;
        if ( ( u = PreIfEval(s,&val) ) == 0 ) return(-1);
        if ( u < t ) {
                MesPrint("@Unmatched parentheses in condition");
                return(-1);
        }
        if ( val ) return(EXECUTINGIF);
        else       return(LOOKINGFORELSE);
}

/*
                 #] EvalPreIf : 
                 #[ PreIfEval :

                Used for recursions in the evaluation of a preprocessor if-condition.
                It determines whether the contents of () is true or false
                (or in error).
                The return value is the address of the first character after the
                closing parenthesis or null if there is an error.
                In value we find true(1) or false(0)
                We enter after the opening parenthesis.
                There are levels:
                        0: orlevel:  a || b
                        1: andlevel: a && b
                        2: eqlevel:  a == b or a != b or a = b
                        3: cmplevel: a > b or a >= b or a < b or a <= b or a >~ b etc
*/

UBYTE *PreIfEval(UBYTE *s, int *value)
{
        int orlevel = 0, andlevel = 0, eqlevel = 0, cmplevel = 0;
        int type, val;
        LONG val2;
        int ortype, orval, cmptype, cmpval, eqtype, eqval, andtype, andval;
        UBYTE *t, *eqt, *cmpt, c;
        int eqop, cmpop;
        ortype = orval = cmptype = cmpval = eqtype = eqval = andtype = andval = 0;
        eqop = cmpop = 0;
        eqt = cmpt = 0;
        *value = 0;
        while ( *s != ')' ) {
                while ( *s == ' ' || *s == '\t' || *s == '\n' || *s == '\r' ) s++;
                t = s;
                s = pParseObject(s,&type,&val2);
                if ( s == 0 ) return(0);
                val = val2;
                c = *s;
                *s++ = 0;    /* in case the object is a string without " */
                while ( c == ' ' || c == '\t' || c == '\n' || c == '\r' ) {
                        c = *s; *s++ = 0;
                }
                if ( *t == '"' ) t++;
                switch(c) {
                        case '|':
                                if ( *s != '|' ) goto illoper;
                                s++;
                                /* fall through */
                        case ')':
                                if ( cmplevel ) {
                                        if ( type == 0 || cmptype == 0 ) goto illobject;
                                        val = PreCmp(type,val,t,cmptype,cmpval,cmpt,cmpop);
                                        type = 0;
                                        cmplevel = 0;
                                }
                                if ( eqlevel ) {
                                        val = PreEq(type,val,t,eqtype,eqval,eqt,eqop);
                                        type = 0;
                                        eqlevel = 0;
                                }
                                if ( andlevel ) {
                                        if ( andtype != 0 || type != 0 ) goto illobject;
                                        val &= andval;
                                        andlevel = 0;
                                }
                                if ( orlevel ) {
                                        if ( ortype != 0 || type != 0 ) goto illobject;
                                        val |= orval;
                                }
                                if ( c == ')' ) {
                                        *value = val;
                                        return(s);
                                }
                                orlevel = 1;
                                orval = val;
                                ortype = type;
                                break;
                        case '&':
                                if ( *s != '&' ) goto illoper;
                                s++;
                                if ( cmplevel ) {
                                        if ( type == 0 || cmptype == 0 ) goto illobject;
                                        val = PreCmp(type,val,t,cmptype,cmpval,cmpt,cmpop);
                                        type = 0;
                                        cmplevel = 0;
                                }
                                if ( eqlevel ) {
                                        val = PreEq(type,val,t,eqtype,eqval,eqt,eqop);
                                        type = 0;
                                        eqlevel = 0;
                                }
                                if ( andlevel ) {
                                        if ( andtype != 0 || type != 0 ) goto illobject;
                                        val &= andval;
                                }
                                andlevel = 1;
                                andval = val;
                                andtype = type;
                                break;
                        case '!':
                        case '=':
                                if ( eqlevel ) goto illorder;
                                if ( cmplevel ) {
                                        if ( type == 0 || cmptype == 0 ) goto illobject;
                                        val = PreCmp(type,val,t,cmptype,cmpval,cmpt,cmpop);
                                        type = 0;
                                        cmplevel = 0;
                                }
                                if ( c == '!' && *s != '=' ) goto illoper;
                                if ( *s == '=' ) s++;
                                if ( c == '!' ) eqop = 1;
                                else eqop = 0;
                                eqlevel = 1; eqt = t; eqval = val; eqtype = type;
                                break;
                        case '>':
                        case '<':
                                if ( cmplevel ) goto illorder;
                                if ( c == '<' ) cmpop = -1;
                                else            cmpop = 1;
                                cmplevel = 1; cmpt = t; cmpval = val; cmptype = type;
                                if ( *s == '=' ) {
                                        s++;
                                        if ( *s == '~' ) { s++; cmpop *= 4; }
                                        else cmpop *= 2;
                                }
                                else if ( *s == '~' ) { s++; cmpop *= 3; }
                                break;
                        default:
                                goto illoper;
                }
        }
        return(s);
illorder:
        MesPrint("@illegal order of operators");
        return(0);
illobject:
        MesPrint("@illegal object for this operator");
        return(0);
illoper:
        MesPrint("@illegal operator");
        return(0);
}

/*
                 #] PreIfEval : 
                 #[ PreCmp :
*/

int PreCmp(int type, int val, UBYTE *t, int type2, int val2, UBYTE *t2, int cmpop)
{
        if ( type == 2 || type2 == 2 || cmpop < -2 || cmpop > 2 ) {
                if ( cmpop < 0 && cmpop > -3 ) cmpop -= 2;
                if ( cmpop > 0 && cmpop <  3 ) cmpop += 2;
                     if ( cmpop ==  3 ) val = StrCmp(t2,t) >  0;
                else if ( cmpop ==  4 ) val = StrCmp(t2,t) >= 0;
                else if ( cmpop == -3 ) val = StrCmp(t2,t) <  0; 
                else if ( cmpop == -4 ) val = StrCmp(t2,t) <= 0; 
        }
        else {
                     if ( cmpop ==  1 ) val = ( val2 >  val );
                else if ( cmpop ==  2 ) val = ( val2 >= val );
                else if ( cmpop == -1 ) val = ( val2 <  val );
                else if ( cmpop == -2 ) val = ( val2 <= val );
        }
        return(val);
}

/*
                 #] PreCmp : 
                 #[ PreEq :
*/

int PreEq(int type, int val, UBYTE *t, int type2, int val2, UBYTE *t2, int eqop)
{
        UBYTE str[20];
        if ( type == 2 || type2 == 2 ) {
                if ( type  != 2 ) { NumToStr(str,val ); t  = str; }
                if ( type2 != 2 ) { NumToStr(str,val2); t2 = str; }
                if ( eqop == 1 ) val = StrCmp(t,t2) != 0;
                else             val = StrCmp(t,t2) == 0;
        }
        else {
                if ( eqop ) val = val != val2;
                else        val = val == val2;
        }
        return(val);
}

/*
                 #] PreEq : 
                 #[ pParseObject :

                Parses a preprocessor object. We can have:
                1: a number  (type = 1)
                2: a string  (type = 2)
                3: an expression between parentheses (type = 0)
                4: a special function (type = 3)
                If the object is not a number, an expression or a special operator
                we try to interpret it as a string.
*/

UBYTE *pParseObject(UBYTE *s, int *type, LONG *val2)
{
        UBYTE *t, c;
        int sign, val = 0;
        LONG x;
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == '(' ) {
                s++;
                while ( *s == ' ' || *s == '\t' || *s == '\n' || *s == '\r' ) s++;
                s = PreIfEval(s,&val);
                *type = 0;
                *val2 = val;
                return(s);
        }
        else if ( *s == '$' && s[1] == '(' ) {
                s += 2;
                while ( *s == ' ' || *s == '\t' || *s == '\n' || *s == '\r' ) s++;
                s = PreIfDollarEval(s,&val);
                *type = 0; *val2 = val;
                return(s);
        }
        if ( *s == 0 ) {
illend:
                MesPrint("@illegal end of condition");
                return(0);
        }
        if ( *s == '"' ) {
                s++;
                while ( *s && *s != '"' ) {
                        if ( *s == '\\' ) s++;
                        s++;
                }
                if ( *s == 0 ) goto illend;
                else *s = 0;
                *type = 2;
                s++;

                while ( *s == ' ' || *s == '\t' || *s == '\n' || *s == '\r' ) s++;

                return(s);
        }
        t = s; sign = 1; x = 0;
        if ( chartype[*t] == 0 ) {        /* Special operators and strings without "" */
                do { t++; } while ( chartype[*t] <= 1 );
                if ( *t == '(' ) {
                        WORD ttype;
                        c = *t; *t = 0;
                        if ( StrICmp(s,(UBYTE *)"termsin") == 0 ) {
                                UBYTE *tt;
                                WORD numdol, numexp;
                                ttype = 0;
together:
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' || *t == '\n' || *t == '\r' ) t++;
                                if ( *t == '$' ) {
                                        t++; tt = t; while (chartype[*tt] <= 1 ) tt++;
                                        c = *tt; *tt = 0;
                                        if ( ( numdol = GetDollar(t) ) > 0 ) {
                                                *tt = c;
                                                if ( ttype == 1 ) {
                                                        x = SizeOfDollar(numdol);
                                                }
                                                else {
                                                        x = TermsInDollar(numdol);
                                                }
                                        }
                                        else {
                                                MesPrint("@$%s has not (yet) been defined",t);
                                                *tt = c;
                                                Terminate(-1);
                                        }
                                }
                                else {
                                        tt = SkipAName(t);
                                        c = *tt; *tt = 0;
                                        if ( GetName(AC.exprnames,t,&numexp,NOAUTO) == NAMENOTFOUND ) {
                                                MesPrint("@%s has not (yet) been defined",t);
                                                *tt = c;
                                                Terminate(-1);
                                        }
                                        else {
                                                *tt = c;
                                                if ( ttype == 1 ) {
                                                        x = SizeOfExpression(numexp);
                                                }
                                                else {
                                                        x = TermsInExpression(numexp);
                                                }
                                        }
                                }
                                while ( *tt == ' ' || *tt == '\t'
                                                 || *tt == '\n' || *tt == '\r' ) tt++;
                                if ( *tt != ')' ) {
                                        MesPrint("@Improper use of terms($var) or terms(expr)");
                                        Terminate(-1);
                                }
                                *type = 3;
                                s = tt+1;
                                *val2 = x;
                                return(s);
                        }
                        else if ( StrICmp(s,(UBYTE *)"sizeof") == 0 ) {
                                ttype = 1;
                                goto together;
                        }
                        else if ( StrICmp(s,(UBYTE *)"exists") == 0 ) {
                                UBYTE *tt;
                                WORD numdol, numexp;
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' || *t == '\n' || *t == '\r' ) t++;
                                if ( *t == '$' ) {
                                        t++; tt = t; while (chartype[*tt] <= 1 ) tt++;
                                        c = *tt; *tt = 0;
                                        if ( ( numdol = GetDollar(t) ) >= 0 ) { x = 1; }
                                        else                                  { x = 0; }
                                        *tt = c;
                                }
                                else if ( *t == '"' ) {        /* see whether a file exists */
/*                                        UBYTE *name, *oldname; */
                                        t++; tt = t;
                                        for (;;) {
                                                if ( *tt == '\\' ) tt++;
                                                else if ( *tt == '"' ) break;
                                                tt++;
                                        }
                                        c = *tt; *tt = 0;
/*
                                        Try to open the file. If possible, return 1.
                                        Afterwards close it.
                                        We do have to run through the FORMPATH. Hence we use LocateFile.
                                        This routine may change the name to the full name.

                                        oldname = name = strDup1(t,"name in exists");
                                        x = LocateFile(&name,-1);
*/
                                        x = OpenFile((char *)t);
                                        if ( x >= 0 ) {
                                                CloseFile(x);
                                                x = 1;
/*
                                                if ( name != oldname ) M_free(name,"name from LocateFile");
*/
                                        }
                                        else x = 0;
/*
                                        M_free(oldname,"name in exists");
*/
                                        *tt++ = c;
                                }
                                else {
                                        tt = SkipAName(t);
                                        c = *tt; *tt = 0;
                                        if ( GetName(AC.exprnames,t,&numexp,NOAUTO) == NAMENOTFOUND ) { x = 0; }
                                        else { x = 1; }
                                        *tt = c;
                                } 
                                while ( *tt == ' ' || *tt == '\t'
                                                 || *tt == '\n' || *tt == '\r' ) tt++;
                                if ( *tt != ')' ) {
                                        MesPrint("@Improper use of exists($var) or exists(expr)");
                                        Terminate(-1);
                                }
                                *type = 3;
                                s = tt+1;
                                *val2 = x;
                                return(s);
                        }
                        else if ( StrICmp(s,(UBYTE *)"isnumerical") == 0 ) {
                                GETIDENTITY
                                UBYTE *tt;
                                WORD numdol, numexp;
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' || *t == '\n' || *t == '\r' ) t++;
                                if ( *t == '$' ) {
                                        t++; tt = t; while (chartype[*tt] <= 1 ) tt++;
                                        c = *tt; *tt = 0;
                                        if ( ( numdol = GetDollar(t) ) < 0 ) {
                                                MesPrint("@$ variable in isnumerical(%s) does not exist",t);
                                                Terminate(-1);
                                        }
                                        x = DolToLong(BHEAD numdol);
                                        if ( AN.ErrorInDollar ) {
                                                DOLLARS d = Dollars + numdol;
                                                x = 0;
                                                if ( d->type == DOLNUMBER || d->type == DOLTERMS ) {
                                                        if ( d->where[0] == 0 ) x = 1;
                                                        else if ( d->where[d->where[0]] == 0 ) {
                                                                if ( ABS(d->where[d->where[0]-1]) == d->where[0]-1 )
                                                                        x = 1;
                                                        }
                                                }
                                        }
                                        else x = 1;
                                        *tt = c;
                                }
                                else {
                                        tt = SkipAName(t);
                                        c = *tt; *tt = 0;
                                        if ( GetName(AC.exprnames,t,&numexp,NOAUTO) == NAMENOTFOUND ) {
                                                MesPrint("@expression in isnumerical(%s) does not exist",t);
                                                Terminate(-1);
                                        }
                                        x = TermsInExpression(numexp);
                                        if ( x != 1 ) x = 0;
                                        else {
                                                WORD *term = AT.WorkPointer;
                                                if ( GetFirstTerm(term,numexp,1) < 0 ) {
                                                        MesPrint("@error reading expression in isnumerical(%s)",t);
                                                        Terminate(-1);
                                                }
                                                if ( *term == ABS(term[*term-1])+1 ) x = 1;
                                                else                                 x = 0;
                                        }
                                        *tt = c;
                                } 
                                while ( *tt == ' ' || *tt == '\t'
                                                 || *tt == '\n' || *tt == '\r' ) tt++;
                                if ( *tt != ')' ) {
                                        MesPrint("@Improper use of isnumerical($var) or numerical(expr)");
                                        Terminate(-1);
                                }
                                *type = 3;
                                s = tt+1;
                                *val2 = x;
                                return(s);
                        }
                        else if ( StrICmp(s,(UBYTE *)("maxpowerof")) == 0 ) {
                                UBYTE *tt;
                                WORD numsym;
                                int stype;
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' || *t == '\n' || *t == '\r' ) t++;
                                tt = SkipAName(t);
                                c = *tt; *tt = 0;
                                if ( ( stype = GetName(AC.varnames,t,&numsym,NOAUTO) ) == NAMENOTFOUND ) {
                                        MesPrint("@%s has not (yet) been defined",t);
                                        *tt = c;
                                        Terminate(-1);
                                }
                                else if ( stype != CSYMBOL ) {
                                        MesPrint("@%s should be a symbol",t);
                                        *tt = c;
                                        Terminate(-1);
                                }
                                else {
                                        *tt = c;
                                        x = symbols[numsym].maxpower;
                                }
                                while ( *tt == ' ' || *tt == '\t'
                                                 || *tt == '\n' || *tt == '\r' ) tt++;
                                if ( *tt != ')' ) {
                                        MesPrint("@Improper use of maxpowerof(symbol)");
                                        Terminate(-1);
                                }
                                *type = 3;
                                s = tt+1;
                                *val2 = x;
                                return(s);
                        }
                        else if ( StrICmp(s,(UBYTE *)("minpowerof")) == 0 ) {
                                UBYTE *tt;
                                WORD numsym;
                                int stype;
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' || *t == '\n' || *t == '\r' ) t++;
                                tt = SkipAName(t);
                                c = *tt; *tt = 0;
                                if ( ( stype = GetName(AC.varnames,t,&numsym,NOAUTO) ) == NAMENOTFOUND ) {
                                        MesPrint("@%s has not (yet) been defined",t);
                                        *tt = c;
                                        Terminate(-1);
                                }
                                else if ( stype != CSYMBOL ) {
                                        MesPrint("@%s should be a symbol",t);
                                        *tt = c;
                                        Terminate(-1);
                                }
                                else {
                                        *tt = c;
                                        x = symbols[numsym].minpower;
                                }
                                while ( *tt == ' ' || *tt == '\t'
                                                 || *tt == '\n' || *tt == '\r' ) tt++;
                                if ( *tt != ')' ) {
                                        MesPrint("@Improper use of minpowerof(symbol)");
                                        Terminate(-1);
                                }
                                *type = 3;
                                s = tt+1;
                                *val2 = x;
                                return(s);
                        }
                        else if ( StrICmp(s,(UBYTE *)"isfactorized") == 0 ) {
                                UBYTE *tt;
                                WORD numdol, numexp;
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' || *t == '\n' || *t == '\r' ) t++;
                                if ( *t == '$' ) {
                                        t++; tt = t; while (chartype[*tt] <= 1 ) tt++;
                                        c = *tt; *tt = 0;
                                        if ( ( numdol = GetDollar(t) ) > 0 ) {
                                                if ( Dollars[numdol].factors != 0 ) x = 1;
                                                else x = 0;
                                        }
                                        else {
                                                MesPrint("@ %s should be the name of an expression or a $ variable",t-1);
                                                Terminate(-1);
                                        }
                                        *tt = c;
                                }
                                else {
                                        tt = SkipAName(t);
                                        c = *tt; *tt = 0;
                                        if ( GetName(AC.exprnames,t,&numexp,NOAUTO) == NAMENOTFOUND ) {
                                                MesPrint("@ %s should be the name of an expression or a $ variable",t);
                                                Terminate(-1);
                                        }
                                        else {
                                                if ( ( Expressions[numexp].vflags & ISFACTORIZED ) != 0 ) x = 1;
                                                else x = 0;
                                        }
                                        *tt = c;
                                } 
                                while ( *tt == ' ' || *tt == '\t'
                                                 || *tt == '\n' || *tt == '\r' ) tt++;
                                if ( *tt != ')' ) {
                                        MesPrint("@Improper use of isfactorized($var) or isfactorized(expr)");
                                        Terminate(-1);
                                }
                                *type = 3;
                                s = tt+1;
                                *val2 = x;
                                return(s);
                        }
                        else if ( StrICmp(s,(UBYTE *)"isdefined") == 0 ) {
                                UBYTE *tt;
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' || *t == '\n' || *t == '\r' ) t++;
                                tt = SkipAName(t);
                                c = *tt; *tt = 0;
                                if ( GetPreVar(t,WITHOUTERROR) != 0 ) x = 1;
                                else x = 0;
                                *tt = c;
                                while ( *tt == ' ' || *tt == '\t'
                                                 || *tt == '\n' || *tt == '\r' ) tt++;
                                if ( *tt != ')' ) {
                                        MesPrint("@Improper use of isdefined(var)");
                                        Terminate(-1);
                                }
                                *type = 3;
                                s = tt+1;
                                *val2 = x;
                                return(s);
                        }
                        else if ( StrICmp(s,(UBYTE *)"flag") == 0 ) {
                                UBYTE *tt;
                                WORD x = 0, numexp;
                                {
                                *t++ = c;
                                while ( *t == ' ' || *t == '\t' ) t++;
                                if ( FG.cTable[*t] != 1 ) goto flagerror;
                                while ( FG.cTable[*t] == 1 ) x = 10*x + (*t++ - '0');
                                if ( x < 1 || x > BITSINWORD ) {
                                        MesPrint("@Illegal number %d for flag in flag condition",x);
                                        goto flagerror;
                                }
                                while ( *t == ' ' || *t == '\t' ) t++;
                                if ( *t != ',' ) goto flagerror;
                                t++;
                                while ( *t == ' ' || *t == '\t' ) t++;
                                tt = SkipAName(t);
                                c = *tt; *tt = 0;
                                if ( GetName(AC.exprnames,t,&numexp,NOAUTO) == NAMENOTFOUND ) {
                                        MesPrint("@ %s should be the name of an expression",t);
                                        goto flagerror;
                                }
                                *tt = c;
                                while ( *t == ' ' || *t == '\t' ) t++;
                                if ( *tt != ')' ) {
flagerror:
                                        MesPrint("@Improper use of flag(num,expr)");
                                        Terminate(-1);
                                        return(0);
                                }
                                if ( ( Expressions[numexp].uflags & ( 1 << (x-1) ) ) != 0 )
                                        *val2 = 1;
                                else *val2 = 0;
                                *type = 3;
                                s = tt+1;
                                return(s);
                                }
                        }
                        else *t = c;
                }
                else if ( *t == '=' || *t == '<' || *t == '>' || *t == '!'
                || *t == ')' || *t == ' ' || *t == '\t' || *t == 0 || *t == '\n' ) {
                        *val2 = 0;
                        *type = 2;
                        return(t);
                }
                else {
                        MesPrint("@Illegal use of string in preprocessor condition: %s",s);
                        Terminate(-1);
                }
        }
        while ( *t == '-' || *t == '+' || *t == ' ' || *t == '\t' ) {
                if ( *t == '-' ) sign = -sign;
                t++;
        }
        while ( chartype[*t] == 1 ) { x = 10*x + *t++ - '0'; }
        while ( *t == ' ' || *t == '\t' ) t++;
        if ( chartype[*t] == 8 || *t == ')' || *t == '=' || *t == 0 ) {
                *val2 = sign > 0 ? x: -x;
                *type = 1;
                return(t);
        }
        while ( chartype[*t] != 8 && *t != ')' && *t != '=' && *t ) t++;
        while ( ( t > s ) && ( t[-1] == ' ' || t[-1] == '\t' ) ) t--;
        *type = 2;
        *val2 = val;
        return(t);
}

/*
                 #] pParseObject : 
                 #[ PreCalc :
 
                To be called when a { is encountered.
                Action: read first till matching }. This is to be stored.
                Next we look whether this is a set or whether it can be
                evaluated. If it is a set we consider it as a new stream.
                The stream will have to be deallocated when read completely.
                If it is to be evaluated we do that and put the result in
                a stream.
*/

UBYTE *PreCalc(VOID)
{
        UBYTE *buff, *s = 0, *t, *newb, c;
        int size, i, n, parlevel = 0, bralevel = 0;
        LONG answer;
        ULONG uanswer;
        size = n = 0;
        buff = 0; c = '{';
        for (;;) {
                if ( n >= size ) {
                        if ( size == 0 ) size = 72;
                        else size *= 2;
                        if ( ( newb = (UBYTE *)Malloc1(size+2,"{}") ) == 0 ) return(0);
                        s = newb;
                        if ( buff ) {
                                i = n;
                                t = buff;
                                NCOPYB(s,t,i);
                                M_free(buff,"pre calc buffer");
                        }
                        else s = newb;
                        buff = newb;
                }
                *s++ = c; n++;
                c = GetChar(0);
                if ( c == 0 ) {
                        Error0("Unmatched {}");
                        M_free(buff,"precalc buffer");
                        return(0);
                }
                else if ( c == '{' ) { bralevel++; }
                else if ( c == '}' ) {
                        if ( --bralevel < 0 ) { *s++ = c; *s = 0; break; }
                }
                else if ( c == '(' ) { parlevel++; }
                else if ( c == ')' ) {
                        if ( --parlevel < 0 ) { *s++ = c; *s = 0; goto setstring; }
                }
                else if ( chartype[c] != 1 && chartype[c] != 5
                && chartype[c] != 6 && c != '!' && c != '&'
                && c != '|' && c != '\\' ) { *s++ = c; *s = 0; goto setstring; }
        }
        if ( parlevel > 0 ) goto setstring;
/*
        Try now to evaluate the string.
        If it works, copy the resulting value back into buff as a string.
*/
        answer = 0;
        if ( PreEval(buff+1,&answer) == 0 ) goto setstring;
        t = buff + size;
        s = buff;
        if ( answer < 0 ) { *s++ = '-'; }
        uanswer = LongAbs(answer);
        n = 0;
        do {
                *--t = ( uanswer % 10 ) + '0';
                uanswer /= 10;
                n++;
        } while ( uanswer > 0 );
        NCOPYB(s,t,n);
        *s = 0;
setstring:;
/*
        Open a stream that contains the current string.
        Mark it to be removed after termination.
*/
        if ( OpenStream(buff,PRECALCSTREAM,0,PRENOACTION) == 0 ) return(0);
        return(buff);
}

/*
                 #] PreCalc : 
                 #[ PreEval :

                Operations are:
                +, -, *, /, %, &, |, ^, !,  ^% (postfix 2log), ^/ (postfix sqrt)
*/

UBYTE *PreEval(UBYTE *s, LONG *x)
{
        LONG y, z, a;
        int tobemultiplied, tobeadded = 1, expsign, i;
        UBYTE *t;
        *x = 0; a = 1;
        while ( *s == ' ' || *s == '\t' ) s++;
        for(;;){
                if ( *s == '+' || *s == '-' ) {
                        if ( *s == '-' ) tobeadded = -1;
                        else tobeadded = 1;
                        s++;
                        while ( *s == '-' || *s == '+' || *s == ' ' || *s == '\t' ) {
                                if ( *s == '-' ) tobeadded = -tobeadded;
                                s++;
                        }
                }
                tobemultiplied = 0;
                for(;;){
                        while ( *s == ' ' || *s == '\t' ) s++;
                        if ( *s <= '9' && *s >= '0' ) {
                                ULONG uy;
                                ParseNumber(uy,s)
                                y = uy;  /* may cause an implementation-defined behaviour */
                        }
                        else if ( *s == '(' || *s == '{' ) {
                                if ( ( t = PreEval(s+1,&y) ) == 0 ) return(0);
                                s = t;
                        }
                        else return(0);
                        while ( *s == ' ' || *s == '\t' ) s++;
                        expsign = 1;
                        while ( *s == '^' || *s == '!' ) {
                                s++;
                                if ( s[-1] == '!' ) {   /* factorial of course */
                                        while ( *s == ' ' || *s == '\t' ) s++;
                                        if ( y < 0 ) {
                                                MesPrint("@Negative value in preprocessor factorial: %l",y);
                                                return(0);
                                        }
                                        else if ( y == 0 ) y = 1;
                                        else if ( y > 1 ) {
                                                z = y-1;
                                                while ( z > 0 ) { y = y*z; z--; }
                                        }
                                        continue;
                                }
                                else if ( *s == '%' ) {        /* ^% is postfix 2log */
                                        s++;
                                        while ( *s == ' ' || *s == '\t' ) s++;
                                        z = y;
                                        if ( z <= 0 ) {
                                                MesPrint("@Illegal value in preprocessor logarithm: %l",z);
                                                return(0);
                                        }
                                        y = 0; z >>= 1;
                                        while ( z ) { y++; z >>= 1; }
                                        continue;
                                }
                                else if ( *s == '/' ) { /* ^/ is postfix sqrt */
                                        LONG yy, zz;
                                        s++;
                                        while ( *s == ' ' || *s == '\t' ) s++;
                                        z = y;
                                        if ( z <= 0 ) {
                                                MesPrint("@Illegal value in preprocessor square root: %l",z);
                                                return(0);
                                        }
                                        if ( z > 8 ) {                /* Very crude integer square root */
                                                zz = z;
                                                yy = 0; zz >>= 1;
                                                while ( zz ) { yy++; zz >>= 1; }
                                                zz = z >> (yy/2); i = 10; y = 0;
                                                do { 
                                                        yy = zz/2 + z/(2*zz); i--;
                                                        if ( y == yy ) break;
                                                        y = zz; zz = yy;
                                                } while ( y != yy && i > 0 );
                                                while ( y*y < z ) y++;
                                                while ( y*y > z ) y--;
                                        }
                                        else if ( z >= 4 ) y = 2;
                                        else if ( z == 0 ) y = 0;
                                        else y = 1;
                                        continue;
                                }
                                while ( *s == ' ' || *s == '\t' ) s++;
                                while ( *s == '-' || *s == '+' || *s == ' ' || *s == '\t' ) {
                                        if ( *s == '-' ) expsign = -expsign;
                                }
                                if ( *s <= '9' && *s >= '0' ) {
                                        ParseNumber(z,s)
                                }
                                else if ( *s == '(' || *s == '{' ) {
                                        if ( ( t = PreEval(s+1,&z) ) == 0 ) return(0);
                                        s = t;
                                }
                                else return(0);
                                while ( *s == ' ' || *s == '\t' ) s++;
                                y = iexp(y,(int)z);
                        }
                        if ( tobemultiplied == 0 ) {
                                if ( expsign < 0 ) a = 1/y;
                                else a = y;
                        }
                        else {
                                if ( tobemultiplied > 2 && expsign != 1 ) {
                                        MesPrint("&Incorrect use of ^ with & or |. Use brackets!");
                                        Terminate(-1);
                                }
                                tobemultiplied *= expsign;
                                if ( tobemultiplied == 1 ) a *= y;
                                else if ( tobemultiplied == 3 ) a &= y;
                                else if ( tobemultiplied == 4 ) a |= y;
                                else {
                                        if ( y == 0 || tobemultiplied == -2 ) {
                                                MesPrint("@Division by zero in preprocessor calculator");
                                                Terminate(-1);
                                        }
                                        if ( tobemultiplied == 2 ) a %= y;
                                        else a /= y;
                                }
                        }
                        if ( *s == '%' ) tobemultiplied = 2;
                        else if ( *s == '*' ) tobemultiplied = 1;
                        else if ( *s == '/' ) tobemultiplied = -1;
                        else if ( *s == '&' ) tobemultiplied = 3;
                        else if ( *s == '|' ) tobemultiplied = 4;
                        else {
                                ULONG ux, ua;
                                ux = *x;
                                ua = a;
                                if ( tobeadded >= 0 ) ux += ua;
                                else ux -= ua;
                                *x = ULongToLong(ux);
                                if ( *s == ')' || *s == '}' ) return(s+1);
                                else if ( *s == '-' || *s == '+' ) { tobeadded = 1; break; }
                                else return(0);
                        }
                        s++;
                }
        }
/*        return(0); */
}

/*
                 #] PreEval : 
                 #[ AddToPreTypes :
*/

void AddToPreTypes(int type)
{
        if ( AP.NumPreTypes >= AP.MaxPreTypes ) {
                int i, *newlist = (int *)Malloc1(sizeof(int)*(2*AP.MaxPreTypes+1)
                                                ,"preprocessor type lists");
                for ( i = 0; i <= AP.MaxPreTypes; i++ ) newlist[i] = AP.PreTypes[i];
                M_free(AP.PreTypes,"preprocessor type lists");
                AP.PreTypes = newlist;
                AP.MaxPreTypes = 2*AP.MaxPreTypes;
        }
        AP.PreTypes[++AP.NumPreTypes] = type;
}

/*
                 #] AddToPreTypes : 
                 #[ MessPreNesting :
*/

void MessPreNesting(int par)
{
        MesPrint("@(%d)Illegal nesting of %#if, %#do, %#procedure and/or %#switch",par);
}

/*
                 #] MessPreNesting : 
                 #[ DoPreAddSeparator :

                Preprocessor directives "addseparator" and "rmseparator" add/remove 
                separator characters used to separate function arguments. 
                Example:

                        #define QQ "a|g|a"
                        #addseparator %
                        *Comma must be quoted!:
                        #rmseparator ","
                        #rmseparator |
                        #call H(a,a%`QQ')

                Characters ' ', '\t' and '"' are ignored!
*/

int DoPreAddSeparator(UBYTE *s)
{
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        for(;*s != '\0';s++){
                while ( *s == ' ' || *s == '\t' || *s == '"') s++;
                /* Todo: 
                if ( set_in(*s,invalidseparators) ) {
                        MesPrint("@Invalid separator specified");
                        return(-1);
                }
                */
                set_set(*s,AC.separators);
        }
        return(0);
}

/*
                 #] DoPreAddSeparator : 
                 #[ DoPreRmSeparator :

                See commentary with DoPreAddSeparator

                Characters ' ', '\t' and '"' are ignored!
*/
int DoPreRmSeparator(UBYTE *s)
{
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        for(;*s != '\0';s++){
                while ( *s == ' ' || *s == '\t' || *s == '"') s++;
                set_del(*s,AC.separators);
        }
        return(0);
}

/*
                 #] DoPreRmSeparator : 
                 #[ DoExternal:

                #external ["prevar"] command
*/
int DoExternal(UBYTE *s)
{ 
#ifdef WITHEXTERNALCHANNEL
        UBYTE *prevar=0;
        int externalD= 0;
#else
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);

#ifdef WITHEXTERNALCHANNEL
        while ( *s == ' ' || *s == '\t' ) s++;
        if(*s == '"'){/*prevar to store the descriptor is defined*/
                prevar=++s;

                if ( chartype[*s] == 0 )for(;*s != '"'; s++)switch(chartype[*s]){
                        case 10:/*'\0' fits here*/
                                MesPrint("@Can't finde closing \"");
                                Terminate(-1);
                        case 0:case 1: continue;
                        default:
                                break;
                }
                if(*s != '"'){
                                MesPrint("@Illegal name of preprocessor variable to store external channel");
                                return(-1);
      }
      *s='\0';
                for(s++; *s == ' ' || *s == '\t'; s++);
        }

        if(*s == '\0'){
                MesPrint("@Illegal external command");
                return(-1);
        }
        /*here s is a command*/
   /*See the file extcmd.c*/
        /*[08may2006 mt]:*/
        externalD=openExternalChannel(
                                s,
                                 AX.daemonize,
                                AX.shellname,
                                AX.stderrname);
        /*:[08may2006 mt]*/
        if(externalD<1){/*error?*/
                /*Not quite correct - terminate the program on error:*/
                Error1("Can't start external program",s);
                return(-1);
        }
   /*Now external command runs.*/
   
   if(prevar){/*Store the external channel descriptor in the provided variable:*/
                UBYTE buf[21];/* 64/Log_2[10] = 19.3, so this is enough forever...*/
                NumToStr(buf,externalD);
                if ( PutPreVar(prevar,buf,0,1) < 0 ) return(-1);
        }

        AX.currentExternalChannel=externalD;
        /*[08may2006 mt]:*/
        if(AX.currentPrompt!=0){/*Change default terminator*/
                if(setTerminatorForExternalChannel(  (char *)AX.currentPrompt)){
                        MesPrint("@Prompt is too long");
                        return(-1);
                }
        }
        setKillModeForExternalChannel(AX.killSignal,AX.killWholeGroup);
        /*:[08may2006 mt]*/
        return(0);
#else /*ifdef WITHEXTERNALCHANNEL*/
        Error0("External channel: not implemented on this computer/system");
        return(-1);
#endif /*ifdef WITHEXTERNALCHANNEL ... else*/
}

/*
                 #] DoExternal: 
                 #[ DoPrompt:
                        #prompt string
*/

int DoPrompt(UBYTE *s)
{
#ifndef WITHEXTERNALCHANNEL
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);

#ifdef WITHEXTERNALCHANNEL
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( AX.currentPrompt )
                        M_free(AX.currentPrompt,"external channel prompt");
        if ( *s == '\0' )
                AX.currentPrompt = (UBYTE *)strDup1((UBYTE *)"","external channel prompt");
        else
                AX.currentPrompt = strDup1(s,"external channel prompt");
        if(  setTerminatorForExternalChannel( (char *)AX.currentPrompt) > 0  ){
                MesPrint("@Prompt is too long");
                return(-1);
        }
        /*else: if 0, ok; if -1, there is no current channel-ok, just prompt is stored.*/
        return(0);
#else /*ifdef WITHEXTERNALCHANNEL*/
        Error0("External channel: not implemented on this computer/system");
        return(-1);
#endif /*ifdef WITHEXTERNALCHANNEL ... else*/
}
/*
                 #] DoPrompt: 
                 #[ DoSetExternal:
                        #setexternal n
*/

int DoSetExternal(UBYTE *s)
{
#ifdef WITHEXTERNALCHANNEL
        int n=0;
#else
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);

#ifdef WITHEXTERNALCHANNEL
        while ( *s == ' ' || *s == '\t' ) s++;
        while ( chartype[*s] == 1 ) { n = 10*n + *s++ - '0'; }
        while ( *s == ' ' || *s == '\t' ) s++;
        if(*s!='\0'){
                MesPrint("@setexternal: number expected");
                return(-1);
        }
        if(selectExternalChannel(n)<0){
                MesPrint("@setexternal: invalid number");
                return(-1);
        }
        AX.currentExternalChannel=n;
        return(0);
#else /*ifdef WITHEXTERNALCHANNEL*/
        Error0("External channel: not implemented on this computer/system");
        return(-1);
#endif /*ifdef WITHEXTERNALCHANNEL ... else*/
}
/*
                 #] DoSetExternal: 
                 #[ DoSetExternalAttr:
*/

static FORM_INLINE UBYTE *pickupword(UBYTE *s)
{

        for(;*s>' ';s++)switch(*s){
                case '=':
                case ',':
                case ';':
                        return(s);
        }/*for(;*s>' ';s++)switch(*s)*/
        return(s);
}
/*Returns 0 if the first string (case insensitively) equal to
  the beginning of the second string (of length n):
*/
static inline int strINCmp(UBYTE *a, UBYTE *b, int n)
{
        for(;n>0;n--)if(tolower(*a++)!=tolower(*b++))
                return(1);
        return(*a != '\0');
}

#define KILL "kill"
#define KILLALL "killall"
#define DAEMON "daemon"
#define SHELL "shell"
#define STDERR "stderr"

#define TRUE_EXPR "true"
#define FALSE_EXPR "false"
#define NOSHELL "noshell"
#define TERMINAL "terminal"

/*
        Expects comma-separated list of pairs name=value
*/
int DoSetExternalAttr(UBYTE *s)
{
#ifdef WITHEXTERNALCHANNEL
        int lnam,lval;
        UBYTE *nam,*val;
#else
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);

#ifdef WITHEXTERNALCHANNEL
        do{
                /*Read the name:*/
                while ( *s == ' ' || *s == '\t' ) s++;
                s=pickupword(nam=s);
                lnam=s-nam;
                while ( *s == ' ' || *s == '\t' ) s++;
                if(*s++!='='){
                        MesPrint("@External channel:'=' expected instead of %s",s-1);
                        return(-1);
                }
                /*Read the value:*/
                while ( *s == ' ' || *s == '\t' ) s++;
                val=s;

                for(;;){
                        UBYTE *m;
                        s=pickupword(s);
                        m=s;
                        while ( *s == ' ' || *s == '\t' ) s++;
         if( (*s == ',')||(*s == '\n')||(*s == ';')||(*s == '\0') ){
                                s=m;
                                break;
                        }
                }/*for(;;)*/

                lval=s-val;
                while ( *s == ' ' || *s == '\t' ) s++;

                if(strINCmp((UBYTE *)SHELL,nam,lnam)==0){
                        if(AX.shellname!=NULL)
                                M_free(AX.shellname,"external channel shellname");
                        if(strINCmp((UBYTE *)NOSHELL,val,lval)==0)
                                AX.shellname=NULL;
                        else{
                                UBYTE *ch,*b;
                                b=ch=AX.shellname=Malloc1(lval+1,"external channel shellname");
                                while(ch-b<lval)
                                        *ch++=*val++;
                                *ch='\0';
                        }
                }else if(strINCmp((UBYTE *)DAEMON,nam,lnam)==0){
                        if(strINCmp((UBYTE *)TRUE_EXPR,val,lval)==0)
                                AX.daemonize = 1;
                        else if(strINCmp((UBYTE *)FALSE_EXPR,val,lval)==0)
                                AX.daemonize = 0;
                        else{
                                MesPrint("@External channel:true or false expected for %s",DAEMON);
                                return(-1);
                        }
                }else        if(strINCmp((UBYTE *)KILLALL,nam,lnam)==0){
                        if(strINCmp((UBYTE *)TRUE_EXPR,val,lval)==0)
                                AX.killWholeGroup = 1;
                        else if(strINCmp((UBYTE *)FALSE_EXPR,val,lval)==0)
                                AX.killWholeGroup = 0;
                        else{
                                MesPrint("@External channel: true or false expected for %s",KILLALL);
                                return(-1);
                        }
                }else        if(strINCmp((UBYTE *)KILL,nam,lnam)==0){
                        int i,n=0;
                        for(i=0;i<lval;i++) {
                                if( *val>='0' && *val<= '9' )
                                        n = 10*n + *val++  - '0';
                                else{
                                        MesPrint("@External channel: number expected for %s",KILL);
                                        return(-1);
                                }
                        }
                        AX.killSignal=n;
                }else        if(strINCmp((UBYTE *)STDERR,nam,lnam)==0){
                        if( AX.stderrname != NULL ) {
                                M_free(AX.stderrname,"external channel stderrname");
                        }
                        if(strINCmp((UBYTE *)TERMINAL,val,lval)==0)
                                AX.stderrname = NULL;
                        else{
                                UBYTE *ch,*b;
                                b=ch=AX.stderrname=Malloc1(lval+1,"external channel stderrname");
                                while(ch-b<lval)
                                        *ch++=*val++;
                                *ch='\0';
                        }
                }else{
                        nam[lnam+1]='\0';
                        MesPrint("@External channel: unrecognized attribute",nam);
                        return(-1);
                }
        }while(*s++ == ',');
        if(  (*(s-1)>' ')&&(*(s-1)!=';')  ){
                MesPrint("@External channel: syntax error: %s",s-1);
                return(-1);
        }
   return(0);
#else /*ifdef WITHEXTERNALCHANNEL*/
        Error0("External channel: not implemented on this computer/system");
        return(-1);
#endif /*ifdef WITHEXTERNALCHANNEL ... else*/
}
/*
                 #] DoSetExternalAttr: 
                 #[ DoRmExternal:
                        #rmexternal [n] (if 0, close all)
*/

int DoRmExternal(UBYTE *s)
{
#ifdef WITHEXTERNALCHANNEL
        int n = -1;
#else
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);

#ifdef WITHEXTERNALCHANNEL
        while ( *s == ' ' || *s == '\t' ) s++;
        if( chartype[*s] == 1 ){
                for(n=0; chartype[*s] == 1 ; s++) { n = 10*n + *s - '0'; }
                while ( *s == ' ' || *s == '\t' ) s++;
        }
        if(*s!='\0'){
                MesPrint("@rmexternal: invalid number");
                return(-1);
        }
        switch(n){
                case 0:/*Close all opened channels*/
                        closeAllExternalChannels();
                        AX.currentExternalChannel=0;
                        /*Do not clean AX.currentPrompt!*/
                        return(0);
                case -1:/*number is not specified - try current*/
                        n=AX.currentExternalChannel;
                        /* fall through */
                default:
                        closeExternalChannel(n);/*No reaction for possible error*/
        }
        if (n == AX.currentExternalChannel)/*cleaned up by closeExternalChannel()*/
                AX.currentExternalChannel=0;
        return(0);
#else /*ifdef WITHEXTERNALCHANNEL*/
        Error0("External channel: not implemented on this computer/system");
        return(-1);
#endif /*ifdef WITHEXTERNALCHANNEL ... else*/

}
/*
                 #] DoRmExternal: 
                 #[ DoFromExternal :
                                #fromexternal 
                                        is used to read the text from the running external
                                        program, the syntax is similar to the #include
                                        directive.
                                #fromexternal "varname"
                                        is used to read the text from the running external
                                        program into the preprocessor variable varname.
                                        directive.
                                #fromexternal "varname" maxlength
                                        is used to read the text from the running external
                                        program into the preprocessor variable varname.
                                        directive. Only first maxlength characters are 
                                        stored.

                                        FORM continues to read the running external
                                        program output until the external program outputs a
                                        prompt.

*/

int DoFromExternal(UBYTE *s)
{
#ifdef WITHEXTERNALCHANNEL
        UBYTE *prevar=0; 
        int lbuf=-1;
        int withNoList=AC.NoShowInput;
        int oldpreassignflag;
#else
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);
#ifdef WITHEXTERNALCHANNEL
        
        FLUSHCONSOLE;

        while ( *s == ' ' || *s == '\t' ) s++;
        /*[17may2006 mt]:*/
        if ( *s == '-' || *s == '+' ) {
                if ( *s == '-' )
                        withNoList = 1;
                else
                        withNoList = 0;
                s++;
                while ( *s == ' ' || *s == '\t' ) s++;
        }/*if ( *s == '-' || *s == '+' )*/
        /*:[17may2006 mt]*/
        /*[02feb2006 mt]:*/
        if(*s == '"'){/*prevar to store the output is defined*/
                prevar=++s;

                if ( *s=='$' || chartype[*s] == 0 )for(;*s != '"'; s++)switch(chartype[*s]){
                        case 10:/*'\0' fits here*/
                                MesPrint("@Can't finde closing \"");
                                Terminate(-1);
                        case 0:case 1: continue;
                        default:
                                break;
                }
                if(*s != '"'){
                                MesPrint("@Illegal name to store output of external channel");
                                return(-1);
      }
      *s='\0';
                for(s++; *s == ' ' || *s == '\t'; s++);
        }/*if(*s == '"')*/

        if(*s != '\0'){
                if( chartype[*s] == 1 ){
                        for(lbuf=0; chartype[*s] == 1 ; s++) { lbuf = 10*lbuf + *s - '0'; }
                        while ( *s == ' ' || *s == '\t' ) s++;
                }
                if( (*s!='\0')||(lbuf<0) ){
                        MesPrint("@Illegal buffer length in fromexternal");
                        return(-1);
                }
        }/*if(*s != '\0')*/
        /*:[02feb20006 mt]*/
        if(getCurrentExternalChannel()!=AX.currentExternalChannel)
                /*[08may20006 mt]:*/
                /*selectExternalChannel(AX.currentExternalChannel);*/
                if(selectExternalChannel(AX.currentExternalChannel)){
                        MesPrint("@No current external channel");
                        return(-1);
                }
                /*:[08may20006 mt]*/

        /*[02feb2006 mt]:*/
        if(prevar!=0){/*The result must be stored into preprovar*/
      UBYTE *buf;
                int cc = 0;
                if(lbuf == -1){/*Unlimited buffer, everything must be stored*/
                        int i;
                        buf=Malloc1( (lbuf=255)+1,"Fromexternal");
                        /*[18may20006 mt]:*/
                        /*for(i=0;(cc=getcFromExtChannel())!=EOF;i++){*/
                        /* May 2006: now getcFromExtChannelOk returns EOF while 
                                getcFromExtChannelFailure returns -2 (see comments in 
                                exctcmd.c):*/
                        for(i=0;(cc=getcFromExtChannel())>0;i++){
                        /*:[18may20006 mt]*/
                                if(i==lbuf){
                                        int j;
                                        UBYTE *tmp=Malloc1( (lbuf*=2)+1,"Fromexternal");
                                        for(j=0;j<i;j++)tmp[j]=buf[j];
                                        M_free(buf,"Fromexternal");
                                        buf=tmp;
                                }
                                buf[i]=(UBYTE)(cc);
                        }/*for(i=0;(cc=getcFromExtChannel())>0;i++)*/
                        /*[18may20006 mt]:*/
         if(cc == -2){
                                MesPrint("@No current external channel");
                                return(-1);
                        }
                        lbuf=i;
                        /*:[18may20006 mt]*/
                        buf[i]='\0';
                }else{/*Fixed buffer, only lbuf chars must be stored*/
                        int i;
                        buf=Malloc1(lbuf+1,"Fromexternal");
                        for(i=0; i<lbuf;i++){
                        /*[18may20006 mt]:*/
                                /*if( (cc=getcFromExtChannel())==EOF )*/
                                /* May 2006: now getcFromExtChannelOk returns EOF while 
                                        getcFromExtChannelFailure returns -2 (see comments in 
                                        exctcmd.c):*/
                                if( (cc=getcFromExtChannel())<1 )
                        /*:[18may20006 mt]*/
                                        break;
                                buf[i]=(UBYTE)(cc);
                        }
                        buf[i]='\0';
                        /*[18may20006 mt]:*/
                        /*if(cc!=EOF)
                                while(getcFromExtChannel()!=EOF);*//*Eat the rest*/
                        /* May 2006: now getcFromExtChannelOk returns EOF while 
                                getcFromExtChannelFailure returns -2 (see comments in 
                                exctcmd.c):*/
                        if(cc>0)
                                while(getcFromExtChannel()>0);/*Eat the rest*/
                        else if(cc == -2){
                                MesPrint("@No current external channel");
                                return(-1);
                        }
                        /*:[18may20006 mt]*/
                }
                /*[18may20006 mt]:*/
                if(*prevar == '$'){/*Put the answer to the dollar variable*/
                        int oldNumPotModdollars = NumPotModdollars;
#ifdef WITHMPI
                        WORD oldRhsExprInModuleFlag = AC.RhsExprInModuleFlag;
                        AC.RhsExprInModuleFlag = 0;
#endif
                        /*Here lbuf is the actual length of buf!*/
                        /*"prevar=buf'\0'":*/
                        UBYTE *pbuf=Malloc1(StrLen(prevar)+1+lbuf+1,"Fromexternal to dollar");
                        UBYTE *c=pbuf;
                        UBYTE *b=prevar;
                        while(*b!='\0'){*c++ = *b++;}
                        *c++='=';
                        b=buf;
                        while(  (*c++=*b++)!='\0'  );
                        oldpreassignflag = AP.PreAssignFlag;
                        AP.PreAssignFlag = 1;
                        if ( ( cc = CompileStatement(pbuf) ) || ( cc = CatchDollar(0) ) ) {
                                Error1("External channel: can't asign output to dollar variable ",prevar);
                        }
                        AP.PreAssignFlag = oldpreassignflag;
                        NumPotModdollars = oldNumPotModdollars;
#ifdef WITHMPI
                        AC.RhsExprInModuleFlag = oldRhsExprInModuleFlag;
#endif
                        M_free(pbuf,"Fromexternal to dollar");
                }else{
                        cc = PutPreVar(prevar, buf, 0, 1) < 0;
                }
                /*:[18may20006 mt]*/
                M_free(buf,"Fromexternal");
                if ( cc ) return(-1);
                return(0);
        }
        /*:[02feb2006 mt]*/
        if ( OpenStream(s,EXTERNALCHANNELSTREAM,0,PRENOACTION) == 0 ) return(-1);
        /*[17may2006 mt]:*/
        AC.NoShowInput = withNoList;
        /*:[17may2006 mt]*/
        return(0);
#else
        Error0("External channel: not implemented on this computer/system");
        return(-1);
#endif
}

/*
                 #] DoFromExternal : 
                 #[ DoToExternal :
                        #toexetrnal
*/

#ifdef WITHEXTERNALCHANNEL

/*A wrapper to writeBufToExtChannel, see the file extcmd.c:*/
LONG WriteToExternalChannel(int handle, UBYTE *buffer, LONG size)
{
        /*ATT! handle is not used! Actual output is performed to
                 the current external channel, see extcmd.c!*/
        DUMMYUSE(handle);
        if(writeBufToExtChannel((char*)buffer,size))
                return(-1);
        return(size);
}
#endif /*ifdef WITHEXTERNALCHANNEL*/

int DoToExternal(UBYTE *s)
{
#ifdef WITHEXTERNALCHANNEL
   HANDLERS h;
   LONG        (*OldWrite)(int handle, UBYTE *buffer, LONG size) = WriteFile;
        int ret=-1;
#else
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.preError ) return(0);
#ifdef WITHEXTERNALCHANNEL

        h.oldsilent=AM.silent;
        h.newlogonly = h.oldlogonly = AM.FileOnlyFlag;
        h.newhandle = h.oldhandle = AC.LogHandle;
        h.oldprinttype = AO.PrintType;

        WriteFile=&WriteToExternalChannel;

        while ( *s == ' ' || *s == '\t' ) s++;

        if(AX.currentExternalChannel==0){
                MesPrint("@No current external channel");
                goto DoToExternalReady;
        }

        if(getCurrentExternalChannel()!=AX.currentExternalChannel)
                selectExternalChannel(AX.currentExternalChannel);

        ret=writeToChannel(EXTERNALCHANNELOUT,s,&h);
        DoToExternalReady:
                WriteFile=OldWrite;
                return(ret);
#else /*ifdef WITHEXTERNALCHANNEL*/
        Error0("External channel: not implemented on this computer/system");
        return(-1);
#endif /*ifdef WITHEXTERNALCHANNEL ... else*/

}

/*
                 #] DoToExternal : 
                 #[ defineChannel :
*/
 
UBYTE *defineChannel(UBYTE *s, HANDLERS *h)
{
        UBYTE *name,*to;

        if ( *s != '<' )
                return(s);

        s++;
        name = to = s;
        while ( *s && *s != '>' ) {
                if ( *s == '\\' ) s++;
                *to++ = *s++;
        }
        if ( *s == 0 ) {
                MesPrint("@Improper termination of filename");
                return(0);
        }
        s++;
        *to = 0;
        if ( *name ) {
                h->newhandle = GetChannel((char *)name,0);
                h->newlogonly = 1;
        }
        else if ( AC.LogHandle >= 0 ) {
                h->newhandle = AC.LogHandle;
                h->newlogonly = 1;
        }
        return(s);        
}

/*
                 #] defineChannel : 
                 #[ writeToChannel :
*/
 
int writeToChannel(int wtype, UBYTE *s, HANDLERS *h)
{
        UBYTE *to, *fstring, *ss, *sss, *s1, c, c1;
        WORD  num, number, nfac;
        WORD oldOptimizationLevel;
        UBYTE Out[MAXLINELENGTH+14], *stopper;
        int nosemi, i;
        int plus = 0;

/*
        Now determine the format string
*/
        while ( *s == ',' || *s == ' ' ) s++;
        if ( *s != '"' ) {
                MesPrint("@No format string present");
                return(-1);
        }
        s++; fstring = to = s;
        while ( *s ) {
                if ( *s == '\\' ) {
                        s++;
                        if ( *s == '\\' ) {
                                *to++ = *s++;
                                if ( *s == '\\' ) *to++ = *s++;
                        }
                        else if ( *s == '"' ) *to++ = *s++;
                        else { *to++ = '\\'; *to++ = *s++; }
                }
                else if ( *s == '"' ) break;
                else *to++ = *s++;
        }
        if ( *s != '"' ) {
                MesPrint("@No closing \" in format string");
                return(-1);
        }
        *to = 0; s++;
        if ( AC.LineLength > 20 && AC.LineLength <= MAXLINELENGTH ) stopper = Out + AC.LineLength;
        else stopper = Out + MAXLINELENGTH;
        to = Out;
/*
        s points now at the list of objects (if any)
        we can start executing the format string.
*/
        AM.silent = 0;
        AC.LogHandle = h->newhandle;
        AM.FileOnlyFlag = h->newlogonly;
        if ( h->newhandle >= 0 ) {
                AO.PrintType |= PRINTLFILE;
        }
        while ( *fstring ) {
                if ( to >= stopper ) {
                        if ( AC.OutputMode == FORTRANMODE && AC.IsFortran90 == ISFORTRAN90 ) {
                                *to++ = '&';
                        }
                        num = to - Out;
                        WriteString(wtype,Out,num);
                        to = Out;
                        if ( AC.OutputMode == FORTRANMODE
                         || AC.OutputMode == PFORTRANMODE ) {
                                number = 7;
                                for ( i = 0; i < number; i++ ) *to++ = ' ';
                                to[-2] = '&';
                        }
                }
                if ( *fstring == '\\' ) {
                        fstring++;
                        if ( *fstring == 'n' ) {
                                num = to - Out;
                                WriteString(wtype,Out,num);
                                to = Out;
                                fstring++;
                        }
                        else if ( *fstring == 't' ) { *to++ = '\t'; fstring++; }
                        else if ( *fstring == 'b' ) { *to++ = '\\'; fstring++; }
                        else *to++ = *fstring++;
                }
                else if ( *fstring == '%' ) {
                        plus = 0;
retry:
                        fstring++;
                        if ( *fstring == 'd' ) {
                                int sign,dig;
                                number = -1;
donumber:
                                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                                sign = 1;
                                while ( *s == '+' || *s == '-' ) {
                                        if ( *s == '-' ) sign = -sign;
                                        s++;
                                }
                                dig = 0; ss = s; if ( sign < 0 ) { ss--; *ss = '-'; dig++; }
                                while ( *s >= '0' && *s <= '9' ) { s++; dig++; }
                                if ( number < 0 ) {
                                        while ( ss < s ) {
                                                if ( to >= stopper ) {
                                                        num = to - Out;
                                                        WriteString(wtype,Out,num);
                                                        to = Out;
                                                }
                                                if ( *ss == '\\' ) ss++;
                                                *to++ = *ss++;
                                        }
                                }
                                else {
                                        if ( number < dig ) { dig = number; ss = s - dig; }
                                        while ( number > dig ) {
                                                if ( to >= stopper ) {
                                                        num = to - Out;
                                                        WriteString(wtype,Out,num);
                                                        to = Out;
                                                }
                                                *to++ = ' '; number--;
                                        }
                                        while ( ss < s ) {
                                                if ( to >= stopper ) {
                                                        num = to - Out;
                                                        WriteString(wtype,Out,num);
                                                        to = Out;
                                                }
                                                if ( *ss == '\\' ) ss++;
                                                *to++ = *ss++;
                                        }
                                }
                                fstring++;
                        }
                        else if ( *fstring == '$' ) {
                                UBYTE *dolalloc;
                                number = AO.OutSkip;
dodollar:
                                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                                if ( AC.OutputMode == FORTRANMODE
                                 || AC.OutputMode == PFORTRANMODE ) {
                                        number = 7;
                                }
                                if ( *s != '$' ) {
nodollar:                        MesPrint("@$-variable expected in #write instruction");
                                        AM.FileOnlyFlag = h->oldlogonly;
                                        AC.LogHandle = h->oldhandle;
                                        AO.PrintType = h->oldprinttype;
                                        AM.silent = h->oldsilent;
                                        return(-1);
                                }
                                s++; ss = s;
                                while ( chartype[*s] <= 1 ) s++;
                                if ( s == ss ) goto nodollar;
                                c = *s; *s = 0;
                                num = GetDollar(ss);
                                if ( num < 0 ) {
                                        MesPrint("@#write instruction: $%s has not been defined",ss);
                                        AM.FileOnlyFlag = h->oldlogonly;
                                        AC.LogHandle = h->oldhandle;
                                        AO.PrintType = h->oldprinttype;
                                        AM.silent = h->oldsilent;
                                        return(-1);
                                }
                                *s = c;
                                if ( *s == '[' ) {
                                        if ( Dollars[num].nfactors <= 0 ) {
                                                *s = 0;
                                                MesPrint("@#write instruction: $%s has not been factorized",ss);
                                                AM.FileOnlyFlag = h->oldlogonly;
                                                AC.LogHandle = h->oldhandle;
                                                AO.PrintType = h->oldprinttype;
                                                AM.silent = h->oldsilent;
                                                return(-1);
                                        }
/*
                                        Now get the number between the []
*/
                                        nfac = GetDollarNumber(&s,Dollars+num);

                                        if ( Dollars[num].nfactors == 1 && nfac == 1 ) goto writewhole;

                                        if ( ( dolalloc = WriteDollarFactorToBuffer(num,nfac,0) ) == 0 ) {
                                                AM.FileOnlyFlag = h->oldlogonly;
                                                AC.LogHandle = h->oldhandle;
                                                AO.PrintType = h->oldprinttype;
                                                AM.silent = h->oldsilent;
                                                return(-1);
                                        }
                                        goto writealloc;
                                }
                                else if ( *s && *s != ' ' && *s != ',' && *s != '\t' ) {
                                        MesPrint("@#write instruction: illegal characters after $-variable");
                                        AM.FileOnlyFlag = h->oldlogonly;
                                        AC.LogHandle = h->oldhandle;
                                        AO.PrintType = h->oldprinttype;
                                        AM.silent = h->oldsilent;
                                        return(-1);
                                }
                                else {
writewhole:
                                  if ( ( dolalloc = WriteDollarToBuffer(num,0) ) == 0 ) {
                                        AM.FileOnlyFlag = h->oldlogonly;
                                        AC.LogHandle = h->oldhandle;
                                        AO.PrintType = h->oldprinttype;
                                        AM.silent = h->oldsilent;
                                        return(-1);
                                  }
                                  else {
writealloc:
                                        ss = dolalloc;
                                        while ( *ss ) {
                                                if ( to >= stopper ) {
                                                        if ( AC.OutputMode == FORTRANMODE && AC.IsFortran90 == ISFORTRAN90 ) {
                                                                *to++ = '&';
                                                        }
                                                        num = to - Out;
                                                        WriteString(wtype,Out,num);
                                                        to = Out;
                                                        for ( i = 0; i < number; i++ ) *to++ = ' ';
                                                        if ( AC.OutputMode == FORTRANMODE
                                                         || AC.OutputMode == PFORTRANMODE ) to[-2] = '&';
                                                }
                                                if ( chartype[*ss] > 3 ) { *to++ = *ss++; }
                                                else {
                                                        sss = ss; while ( chartype[*ss] <= 3 ) ss++;
                                                        if ( ( to + (ss-sss) ) >= stopper ) {
                                                                if ( (ss-sss) >= (stopper-Out) ) {
                                                                        if ( ( to - stopper ) < 10 ) {
                                                                                if ( AC.OutputMode == FORTRANMODE && AC.IsFortran90 == ISFORTRAN90 ) {
                                                                                        *to++ = '&';
                                                                                }
                                                                                num = to - Out;
                                                                                WriteString(wtype,Out,num);
                                                                                to = Out;
                                                                                for ( i = 0; i < number; i++ ) *to++ = ' ';
                                                                                if ( AC.OutputMode == FORTRANMODE
                                                                                 || AC.OutputMode == PFORTRANMODE ) to[-2] = '&';
                                                                        }
                                                                        while ( (ss-sss) >= (stopper-Out) ) {
                                                                                while ( to < stopper-1 ) {
                                                                                        *to++ = *sss++;
                                                                                }
                                                                                if ( AC.OutputMode == FORTRANMODE && AC.IsFortran90 == ISFORTRAN90 ) {
                                                                                        *to++ = '&';
                                                                                }
                                                                                else {
                                                                                        *to++ = '\\';
                                                                                }
                                                                                num = to - Out;
                                                                                WriteString(wtype,Out,num);
                                                                                to = Out;
                                                                                if ( AC.OutputMode == FORTRANMODE
                                                                                 || AC.OutputMode == PFORTRANMODE ) {
                                                                                        for ( i = 0; i < number; i++ ) *to++ = ' ';
                                                                                        to[-2] = '&';
                                                                                }
                                                                        }
                                                                }
                                                                else {
                                                                        if ( AC.OutputMode == FORTRANMODE && AC.IsFortran90 == ISFORTRAN90 ) {
                                                                                *to++ = '&';
                                                                        }
                                                                        num = to - Out;
                                                                        WriteString(wtype,Out,num);
                                                                        to = Out;
                                                                        for ( i = 0; i < number; i++ ) *to++ = ' ';
                                                                        if ( AC.OutputMode == FORTRANMODE
                                                                         || AC.OutputMode == PFORTRANMODE ) to[-2] = '&';
                                                                }
                                                        }
                                                        while ( sss < ss ) *to++ = *sss++;
                                                }
                                        }
                                  }
                                  M_free(dolalloc,"written dollar");
                                  fstring++;
                                }
                        }
                        else if ( *fstring == 's' ) {
                                fstring++;
                                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                                if ( *s == '"' ) {
                                        s++; ss = s;
                                        while ( *s ) {
                                                if ( *s == '\\' ) s++;
                                                else if ( *s == '"' ) break;
                                                s++;
                                        }
                                        if ( *s == 0 ) {
                                                MesPrint("@#write instruction: Missing \" in string");
                                                AM.FileOnlyFlag = h->oldlogonly;
                                                AC.LogHandle = h->oldhandle;
                                                AO.PrintType = h->oldprinttype;
                                                AM.silent = h->oldsilent;
                                                return(-1);
                                        }
                                        while ( ss < s ) {
                                                if ( to >= stopper ) {
                                                        num = to - Out;
                                                        WriteString(wtype,Out,num);
                                                        to = Out;
                                                }
                                                if ( *ss == '\\' ) ss++;
                                                *to++ = *ss++;
                                        }
                                        s++;
                                }
                                else {
                                        sss = ss = s;
                                        while ( *s && *s != ',' ) {
                                                if ( *s == '\\' ) { s++; sss = s+1; }
                                                s++;
                                        }
                                        while ( s > sss+1 && ( s[-1] == ' ' || s[-1] == '\t' ) ) s--;
                                        while ( ss < s ) {
                                                if ( to >= stopper ) {
                                                        num = to - Out;
                                                        WriteString(wtype,Out,num);
                                                        to = Out;
                                                }
                                                if ( *ss == '\\' ) ss++;
                                                *to++ = *ss++;
                                        }
                                }
                        }
                        else if ( *fstring == 'X' ) {
                                fstring++;
                                if ( cbuf[AM.sbufnum].numrhs > 0 ) {
/*
                                        This should be only to the value of AM.oldnumextrasymbols
*/
                                        UBYTE *s = GetPreVar(AM.oldnumextrasymbols,0);
                                        WORD x = 0;
                                        while ( *s >= '0' && *s <= '9' ) x = 10*x + *s++ - '0';
                                        if ( x > 0 )
                                                PrintSubtermList(1,x);
                                        else
                                                PrintSubtermList(1,cbuf[AM.sbufnum].numrhs);
                                }
                        }
                        else if ( *fstring == 'O' ) {
                                number = AO.OutSkip;
dooptim:
                                fstring++;
/*
                                First test whether there is an optimization buffer
*/
                                if ( AO.OptimizeResult.code == NULL && AO.OptimizationLevel != 0 ) {
                                        MesPrint("@In #write instruction: no optimization results available!");
                                        return(-1);
                                }
                                num = to - Out;
                                WriteString(wtype,Out,num);
                                to = Out;
                                if ( AO.OptimizationLevel != 0 ) {
                                        WORD oldoutskip = AO.OutSkip;
                                        AO.OutSkip = number;
                                        optimize_print_code(0);
                                        AO.OutSkip = oldoutskip;
                                }
                        }
                        else if ( *fstring == 'e' || *fstring == 'E' ) {
                                if ( *fstring == 'E'
                                        || AC.OutputMode == FORTRANMODE
                                        || AC.OutputMode == PFORTRANMODE ) nosemi = 1;
                                else nosemi = 0;
                                fstring++;
                                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                                if ( chartype[*s] != 0 && *s != '[' ) {
noexpr:                                MesPrint("@expression name expected in #write instruction");
                                        AM.FileOnlyFlag = h->oldlogonly;
                                        AC.LogHandle = h->oldhandle;
                                        AO.PrintType = h->oldprinttype;
                                        AM.silent = h->oldsilent;
                                        return(-1);
                                }
                                ss = s;
                                if ( ( s = SkipAName(ss) ) == 0 || s[-1] == '_' ) goto noexpr;
                                s1 = s; c = c1 = *s1;
                                if ( c1 == '(' ) {
                                        SKIPBRA3(s)
                                        if ( *s == ')' ) {
                                                AO.CurBufWrt = s1+1;
                                                c = *s; *s = 0;
                                        }
                                        else {
                                                MesPrint("@Illegal () specifier in expression name in #write");
                                                AM.FileOnlyFlag = h->oldlogonly;
                                                AC.LogHandle = h->oldhandle;
                                                AO.PrintType = h->oldprinttype;
                                                AM.silent = h->oldsilent;
                                                return(-1);
                                        }
                                }
                                else AO.CurBufWrt = (UBYTE *)underscore;
                                *s1 = 0;
                                num = to - Out;
                                if ( num > 0 ) WriteUnfinString(wtype,Out,num);
                                to = Out;
                                oldOptimizationLevel = AO.OptimizationLevel;
                                AO.OptimizationLevel = 0;
                                if ( WriteOne(ss,(int)num,nosemi,plus) < 0 ) {
                                        AM.FileOnlyFlag = h->oldlogonly;
                                        AC.LogHandle = h->oldhandle;
                                        AO.PrintType = h->oldprinttype;
                                        AM.silent = h->oldsilent;
                                        return(-1);
                                }
                                AO.OptimizationLevel = oldOptimizationLevel;
                                *s1 = c1;
                                if ( s > s1 ) *s++ = c;
                        }
/*
                        File content
*/
                        else if ( ( *fstring == 'f' ) || ( *fstring == 'F' ) ) {
                                LONG n;
                                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                                ss = s;
                                while ( *s && *s != ',' ) {
                                        if ( *s == '\\' ) s++;
                                        s++;
                                }
                                c = *s; *s = 0;
                                s1 = LoadInputFile(ss,HEADERFILE);
                                *s = c;
/*
                                There should have been a way to pass the file size.
                                Also there should be conversions for \r\n etc.
*/
                                if ( s1 ) {
                                        ss = s1; while ( *ss ) ss++;
                                        n = ss-s1;
                                        WriteString(wtype,s1,n);
                                        M_free(s1,"copy file");
                                }
                                else if ( *fstring == 'F' ) {
                                        *s = 0;
                                        MesPrint("@Error in #write: could not open file %s",ss);
                                        *s = c;
                                        goto ReturnWithError;
                                }
                                fstring++;
                        }
                        else if ( *fstring == '%' ) {
                                *to++ = *fstring++;
                        }
                        else if ( FG.cTable[*fstring] == 1 ) {  /* %#S */
                                number = 0;
                                while ( FG.cTable[*fstring] == 1 ) {
                                        number = 10*number + *fstring++ - '0';
                                }
                                if ( *fstring == 'O' ) goto dooptim;
                                else if ( *fstring == 'd' ) goto donumber;
                                else if ( *fstring == '$' ) goto dodollar;
                                else if ( *fstring == 't' ) {        /* `tab' position */
                                        if ( number < (WORD)(stopper-Out) ) {
                                                while ( (WORD)(to-Out) < number ) *to++ = ' ';
                                        }
                                        fstring++;
                                }
                                else if ( *fstring == 'X' || *fstring == 'x' ) {
                                        if ( number > 0 && number <= cbuf[AM.sbufnum].numrhs ) {
                                                UBYTE buffer[80], *out, *old1, *old2, *old3;
                                                WORD *term, first;
                                                if ( *fstring == 'X' ) {
                                                        out = StrCopy((UBYTE *)AC.extrasym,buffer);
                                                        if ( AC.extrasymbols == 0 ) {
                                                                out = NumCopy(number,out);
                                                                out = StrCopy((UBYTE *)"_",out);
                                                        }
                                                        else if ( AC.extrasymbols == 1 ) {
                                                                if ( AC.OutputMode == CMODE ) {
                                                                        out = StrCopy((UBYTE *)"[",out);
                                                                        out = NumCopy(number,out);
                                                                        out = StrCopy((UBYTE *)"]",out);
                                                                }
                                                                else {
                                                                        out = StrCopy((UBYTE *)"(",out);
                                                                        out = NumCopy(number,out);
                                                                        out = StrCopy((UBYTE *)")",out);
                                                                }
                                                        }
                                                        out = StrCopy((UBYTE *)"=",out);
                                                        ss = buffer;
                                                        while ( ss < out ) {
                                                                if ( to >= stopper ) {
                                                                        num = to - Out;
                                                                        WriteString(wtype,Out,num);
                                                                        to = Out;
                                                                }
                                                                *to++ = *ss++;
                                                        }
                                                }
                                                term = cbuf[AM.sbufnum].rhs[number];
                                                first = 1;
                                                if ( *term == 0 ) {
                                                        *to++ = '0';
                                                }
                                                else {
                                                        old1 = AO.OutFill;
                                                        old2 = AO.OutputLine;
                                                        old3 = AO.OutStop;
                                                        AO.OutFill = to;
                                                        AO.OutputLine = Out;
                                                        AO.OutStop = Out + AC.LineLength;
                                                        while ( *term ) {
                                                                if ( WriteInnerTerm(term,first) ) Terminate(-1);
                                                                term += *term;
                                                                first = 0;
                                                        }
                                                        to = Out + (AO.OutFill-AO.OutputLine);
                                                        AO.OutFill = old1;
                                                        AO.OutputLine = old2;
                                                        AO.OutStop = old3;
                                                }
                                        }
                                        fstring++;
                                }
                                else {
                                        goto IllegControlSequence;
                                }
                        }
                        else if ( *fstring == '+' ) {
                                plus = 1; goto retry;
                        }
                        else if ( *fstring == 0 ) {
                                *to++ = 0;
                        }
                        else {
IllegControlSequence:
                                MesPrint("@Illegal control sequence in format string in #write instruction");
ReturnWithError:
                                AM.FileOnlyFlag = h->oldlogonly;
                                AC.LogHandle = h->oldhandle;
                                AO.PrintType = h->oldprinttype;
                                AM.silent = h->oldsilent;
                                return(-1);
                        }
                }
                else {
                        *to++ = *fstring++;
                }
        }
/*
        Now flush the output
*/
        num = to - Out;
        /*[15apr2004 mt]:*/
        if(wtype==EXTERNALCHANNELOUT){
                if(num!=0)
                        WriteUnfinString(wtype,Out,num);
        }else
        /*:[15apr2004 mt]*/
        WriteString(wtype,Out,num);
/*
        and restore original parameters
*/
        AM.FileOnlyFlag = h->oldlogonly;
        AC.LogHandle = h->oldhandle;
        AO.PrintType = h->oldprinttype;
        AM.silent = h->oldsilent;
        return(0);
}

/*
                 #] writeToChannel : 
                 #[ DoFactDollar :

                Executes the #factdollar $var
                      instruction
*/

int DoFactDollar(UBYTE *s)
{
        GETIDENTITY
        WORD numdollar, *oldworkpointer;

        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == '$' ) {
                if ( GetName(AC.dollarnames,s+1,&numdollar,NOAUTO) != CDOLLAR ) {
                        MesPrint("@%s is undefined",s);
                        return(-1);
                }
                s = SkipAName(s+1);
                if ( *s != 0 ) {
                        MesPrint("@#FactDollar should have a single $variable for its argument");
                        return(-1);
                }
                NewSort(BHEAD0);
                oldworkpointer = AT.WorkPointer;
                if ( DollarFactorize(BHEAD numdollar) ) return(-1);
                AT.WorkPointer = oldworkpointer;
                LowerSortLevel();
                return(0);
        }
        else if ( ParenthesesTest(s) ) return(-1);
        else {
                MesPrint("@#FactDollar should have a single $variable for its argument");
                return -1;
        }
}

/*
                 #] DoFactDollar : 
                 #[ GetDollarNumber :
*/

WORD GetDollarNumber(UBYTE **inp, DOLLARS d)
{
        UBYTE *s = *inp, c, *name;
        WORD number, nfac, *w;
        DOLLARS dd;
        s++;
        if ( *s == '$' ) {
                s++; name = s;
                while ( FG.cTable[*s] < 2 ) s++;
                c = *s; *s = 0;
                if ( GetName(AC.dollarnames,name,&number,NOAUTO) == NAMENOTFOUND ) {
                        MesPrint("@dollar in #write should have been defined previously");
                        Terminate(-1);
                }
                *s = c;
                dd = Dollars + number;
                if ( c == '[' ) {
                        *inp = s;
                        nfac = GetDollarNumber(inp,dd);
                        s = *inp;
                        if ( *s != ']' ) {
                                MesPrint("@Illegal factor for dollar variable");
                                Terminate(-1);
                        }
                        *inp = s+1;
                        if ( nfac == 0 ) {
                                if ( dd->nfactors > d->nfactors ) {
TooBig:
                                        MesPrint("@Factor number for dollar variable too large");
                                        Terminate(-1);
                                }
                                return(dd->nfactors);
                        }
                        w = dd->factors[nfac-1].where;
                        if ( w == 0 ) {
                                if ( dd->factors[nfac-1].value > d->nfactors ||
                                     dd->factors[nfac-1].value < 0 ) goto TooBig;
                                return(dd->factors[nfac-1].value);
                        }
                        if ( *w == 4 && w[4] == 0 && w[3] == 3 && w[2] == 1
                          && w[1] <= d->nfactors ) return(w[1]);
                        if ( w[*w] == 0 && w[*w-1] == *w-1 ) goto TooBig;
IllNum:
                        MesPrint("@Illegal factor number for dollar variable");
                        Terminate(-1);
                }
                else {        /* The dollar should be a number */
                        if ( dd->type == DOLZERO ) {
                                return(0);
                        }
                        else if ( dd->type == DOLTERMS || dd->type == DOLNUMBER ) {
                                w = dd->where;
                                if ( *w == 4 && w[4] == 0 && w[3] == 3 && w[2] == 1
                                  && w[1] <= d->nfactors ) return(w[1]);
                                if ( w[*w] == 0 && w[*w-1] == *w-1 ) goto TooBig;
                                goto IllNum;
                        }
                        else goto IllNum;
                }
        }
        else if ( FG.cTable[*s] == 1 ) {
                WORD x = *s++ - '0';
                while ( FG.cTable[*s] == 1 ) {
                        x = 10*x + *s++ - '0';
                        if ( x > d->nfactors ) {
                                MesPrint("@Factor number %d for dollar variable too large",x);
                                Terminate(-1);
                        }
                }
                if ( *s != ']' ) {
                        MesPrint("@Illegal factor number for dollar variable");
                        Terminate(-1);
                }
                s++; *inp = s;
                return(x);
        }
        else {
                MesPrint("@Illegal factor indicator for dollar variable");
                Terminate(-1);
        }
        return(-1);
}

/*
                 #] GetDollarNumber : 
                 #[ DoSetRandom :

                Executes the #SetRandom number
*/

int DoSetRandom(UBYTE *s)
{
        ULONG x;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        x = 0;
        while ( FG.cTable[*s] == 1 ) {
                x = 10*x + (*s++-'0');
        }
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s  == 0 ) {
#ifdef WITHPTHREADS
#ifdef WITHSORTBOTS
                int id, totnum = MaX(2*AM.totalnumberofthreads-3,AM.totalnumberofthreads);
#else
                int id, totnum = AM.totalnumberofthreads;
#endif
                for ( id = 0; id < totnum; id++ ) {
                        AB[id]->R.wranfseed = x;
                        if ( AB[id]->R.wranfia ) M_free(AB[id]->R.wranfia,"wranf");
                        AB[id]->R.wranfia = 0;
                }
#else
                AR.wranfseed = x;
                if ( AR.wranfia ) M_free(AR.wranfia,"wranf");
                AR.wranfia = 0;
#endif
                return(0);
        }
        else {
                MesPrint("@proper syntax is #SetRandom number");
                return(-1);
        }
}

/*
                 #] DoSetRandom : 
                 #[ DoOptimize :

                Executes the #Optimize(expr) instruction.
*/

int DoOptimize(UBYTE *s)
{
        GETIDENTITY
        UBYTE *exprname;
        WORD numexpr;
        int error = 0, i;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        DUMMYUSE(*s)
        exprname = s; s = SkipAName(s);
        if ( *s != 0 && *s != ';' ) {
                MesPrint("@proper syntax is #Optimize,expression");
                return(-1);
        }
        *s = 0;
    if ( GetName(AC.exprnames,exprname,&numexpr,NOAUTO) != CEXPRESSION ) {
                MesPrint("@%s is not an expression",exprname);
                error = 1;
        }
        else if ( AP.preError == 0 ) {
                EXPRESSIONS e = Expressions + numexpr;
                POSITION position;
                int firstterm;
                WORD *term = AT.WorkPointer;
                ClearOptimize();
                if ( AO.OptimizationLevel == 0 ) return(0);
                switch ( e->status ) {
                        case LOCALEXPRESSION:
                        case GLOBALEXPRESSION:
                                break;
                        default:
                                MesPrint("@Expression %s is not an active unhidden local or global expression.",exprname);
                                Terminate(-1);
                                break;
                }
#ifdef WITHMPI
                if ( PF.me == MASTER )
#endif
                RevertScratch();
                for ( i = NumExpressions-1; i >= 0; i-- ) {
                        AS.OldOnFile[i] = Expressions[i].onfile;
                        AS.OldNumFactors[i] = Expressions[i].numfactors;
                        AS.Oldvflags[i] = Expressions[i].vflags;
                        Expressions[i].vflags &= ~(ISUNMODIFIED|ISZERO);
                }
                for ( i = 0; i < NumExpressions; i++ ) {
                        if ( i == numexpr ) {
                                PutPreVar(AM.oldnumextrasymbols,
                                                GetPreVar((UBYTE *)"EXTRASYMBOLS_",0),0,1);
                                Optimize(numexpr, 0);
                                AO.OptimizeResult.nameofexpr = strDup1(exprname,"optimize expression name");
                                continue;
                        }
#ifdef WITHMPI
                        if ( PF.me == MASTER ) {
#endif
                        e = Expressions + i;
                        switch ( e->status ) {
                                case LOCALEXPRESSION:
                                case SKIPLEXPRESSION:
                                case DROPLEXPRESSION:
                                case DROPPEDEXPRESSION:
                                case GLOBALEXPRESSION:
                                case SKIPGEXPRESSION:
                                case DROPGEXPRESSION:
                                case HIDELEXPRESSION:
                                case HIDEGEXPRESSION:
                                case DROPHLEXPRESSION:
                                case DROPHGEXPRESSION:
                                case INTOHIDELEXPRESSION:
                                case INTOHIDEGEXPRESSION:
                                        break;
                                default:
                                        continue;
                        }
                        AR.GetFile = 0;
                        SetScratch(AR.infile,&(e->onfile));
                        if ( GetTerm(BHEAD term) <= 0 ) {
                                MesPrint("@Expression %d has problems reading from scratchfile",i);
                                Terminate(-1);
                        }
                        term[3] = i;
                        AR.DeferFlag = 0;
                        SeekScratch(AR.outfile,&position);
                        e->onfile = position;
                        *AM.S0->sBuffer = 0; firstterm = -1;
                        do {
                                WORD *oldipointer = AR.CompressPointer;
                                WORD *comprtop = AR.ComprTop;
                                AR.ComprTop = AM.S0->sTop;
                                AR.CompressPointer = AM.S0->sBuffer;
                                if ( firstterm > 0 ) {
                                        if ( PutOut(BHEAD term,&position,AR.outfile,1) < 0 ) goto DoSerr;
                                }
                                else if ( firstterm < 0 ) {
                                        if ( PutOut(BHEAD term,&position,AR.outfile,0) < 0 ) goto DoSerr;
                                        firstterm++;
                                }
                                else {
                                        if ( PutOut(BHEAD term,&position,AR.outfile,-1) < 0 ) goto DoSerr;
                                        firstterm++;
                                }
                                AR.CompressPointer = oldipointer;
                                AR.ComprTop = comprtop;
                        } while ( GetTerm(BHEAD term) );
                        if ( FlushOut(&position,AR.outfile,1) ) {
DoSerr:
                                MesPrint("@Expression %d has problems writing to scratchfile",i);
                                Terminate(-1);
                        }
#ifdef WITHMPI
                        }
#endif
                }
/*
                Now some administration and we are done
*/
                UpdateMaxSize();
        }
        else {
                ClearOptimize();
        }
        return(error);
        
}

/*
                 #] DoOptimize : 
                 #[ DoClearOptimize :

                Clears all relevant buffers of the output optimization
*/

int DoClearOptimize(UBYTE *s)
{
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        DUMMYUSE(*s);
        return(ClearOptimize());
}

/*
                 #] DoClearOptimize : 
                 #[ DoSkipExtraSymbols :

                Adds the intermediate variables of the previous optimization
                to the list of extra symbols, provided it has not yet been erased
                by a #clearoptimize
                To remove them again one needs to use the 'delete extrasymbols;'
                or the 'delete extrasymbols>num;' statement in which num is the
                old number of extra symbols.
*/

int DoSkipExtraSymbols(UBYTE *s)
{
        CBUF *C = cbuf + AM.sbufnum;
        WORD tt = 0, j = 0, oldval = AO.OptimizeResult.minvar;
        if ( AO.OptimizeResult.code == NULL ) return(0);
        if ( AO.OptimizationLevel == 0 ) return(0);
        while ( *s == ',' ) s++;
        if ( *s == 0 ) {
                AO.OptimizeResult.minvar = AO.OptimizeResult.maxvar+1;
        }
        else {
                while ( *s <= '9' && *s >= '0' ) j = 10*j + *s++ - '0';
                if ( *s ) {
                        MesPrint("@Illegal use of #SkipExtraSymbols instruction");
                        Terminate(-1);
                }
                AO.OptimizeResult.minvar += j;
                if ( AO.OptimizeResult.minvar > AO.OptimizeResult.maxvar )
                        AO.OptimizeResult.minvar = AO.OptimizeResult.maxvar+1;
        }
        j = AO.OptimizeResult.minvar - oldval;
        while ( j > 0 ) {
                AddRHS(AM.sbufnum,1);
                AddNtoC(AM.sbufnum,1,&tt,16);
                AddToCB(C,0)
                InsTree(AM.sbufnum,C->numrhs);
                j--;
        }
        return(0);
}

/*
                 #] DoSkipExtraSymbols : 
                 #[ DoPreReset :

                Does a reset of variables.
                Currently only the timer (stopwatch) of `timer_'
*/

int DoPreReset(UBYTE *s)
{
        UBYTE *ss, c;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s == 0 ) {
                MesPrint("@proper syntax is #Reset variable");
                return(-1);
        }
        ss = s;
        while ( FG.cTable[*s] == 0 ) s++;
        c = *s; *s = 0;
        if ( ( StrICmp(ss,(UBYTE *)"timer") == 0 )
          || ( StrICmp(ss,(UBYTE *)"stopwatch") == 0 ) ) {
                *s = c;
                AP.StopWatchZero = GetRunningTime();
                return(0);
        }
        else {
                *s = c;
                MesPrint("@proper syntax is #Reset variable");
                return(-1);
        }
}

/*
                 #] DoPreReset : 
                 #[ DoPreAppendPath :
*/

static int DoAddPath(UBYTE *s, int bPrepend)
{
        /* NOTE: this doesn't support some file systems, e.g., 0x5c with CP932. */

        UBYTE *path, *path_end, *current_dir, *current_dir_end, *NewPath, *t;
        int bRelative, n;

        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);

        /* Parse the path in the input. */
        while ( *s == ' ' || *s == '\t' ) s++;  /* skip spaces */
        if ( *s == '"' ) {  /* the path is given by "..." */
                path = ++s;
                while ( *s && *s != '"' ) {
                        if ( SEPARATOR != '\\' && *s == '\\' ) {  /* escape character, e.g., "\\\"" */
                                if ( !s[1] ) goto ImproperPath;
                                s++;
                        }
                        s++;
                }
                if ( *s != '"' ) goto ImproperPath;
                path_end = s++;
        }
        else {
                path = s;
                while ( *s && *s != ' ' && *s != '\t' ) {
                        if ( SEPARATOR != '\\' && *s == '\\' ) {  /* escape character, e.g., "\\ " */
                                if ( !s[1] ) goto ImproperPath;
                                s++;
                        }
                        s++;
                }
                path_end = s;
        }
        if ( path == path_end ) goto ImproperPath;  /* empty path */
        while ( *s == ' ' || *s == '\t' ) s++;  /* skip spaces */
        if ( *s ) goto ImproperPath;  /* extra tokens found */

        /* Check if the path is an absolute path. */
        bRelative = 1;
        if ( path[0] == SEPARATOR ) {  /* starts with the directory separator */
                bRelative = 0;
        }
#ifdef WINDOWS
        else if ( chartype[path[0]] == 0 && path[1] == ':' ) {  /* starts with (drive letter): */
                bRelative = 0;
        }
#endif

        /* Get the current file directory when a relative path is given. */
        if ( bRelative ) {
                if ( !AC.CurrentStream ) goto FileNameUnavailable;
                if ( AC.CurrentStream->type != FILESTREAM && AC.CurrentStream->type != REVERSEFILESTREAM ) goto FileNameUnavailable;
                if ( !AC.CurrentStream->name ) goto FileNameUnavailable;
                s = current_dir = current_dir_end = AC.CurrentStream->name;
                while ( *s ) {
                        if ( SEPARATOR != '\\' && *s == '\\' && s[1] ) {  /* escape character, e.g., "\\\"" */
                                s += 2;
                                continue;
                        }
                        if ( *s == SEPARATOR ) {
                                current_dir_end = s;
                        }
                        s++;
                }
        }
        else {
                current_dir = current_dir_end = NULL;
        }

        /* Allocate a buffer for new AM.Path. */
        n = path_end - path;
        if ( AM.Path ) n += StrLen(AM.Path) + 1;
        if ( current_dir != current_dir_end ) n+= current_dir_end - current_dir + 1;
        s = NewPath = (UBYTE *)Malloc1(n + 1,"add path");

        /* Construct new FORM path. */
        if ( bPrepend ) {
                if ( current_dir != current_dir_end ) {
                        t = current_dir;
                        while ( t != current_dir_end ) *s++ = *t++;
                        *s++ = SEPARATOR;
                }
                t = path;
                while ( t != path_end ) *s++ = *t++;
                if ( AM.Path ) *s++ = PATHSEPARATOR;
        }
        if ( AM.Path ) {
                t = AM.Path;
                while ( *t ) *s++ = *t++;
        }
        if ( !bPrepend ) {
                if ( AM.Path ) *s++ = PATHSEPARATOR;
                if ( current_dir != current_dir_end ) {
                        t = current_dir;
                        while ( t != current_dir_end ) *s++ = *t++;
                        *s++ = SEPARATOR;
                }
                t = path;
                while ( t != path_end ) *s++ = *t++;
        }
        *s = '\0';

        /* Update AM.Path. */
        if ( AM.Path ) M_free(AM.Path,"add path");
        AM.Path = NewPath;

        return(0);

ImproperPath:
        MesPrint("@Improper syntax for %#%sPath", bPrepend ? "Prepend" : "Append");
        return(-1);

FileNameUnavailable:
        /* This may be improved in future. */
        MesPrint("@Sorry, %#%sPath can't resolve the current file name from here", bPrepend ? "Prepend" : "Append");
        return(-1);
}

/**
 * Appends the given path (absolute or relative to the current file directory)
 * to the FORM path.
 *
 * Syntax:
 *   #appendpath <path>
 */
int DoPreAppendPath(UBYTE *s)
{
        return DoAddPath(s, 0);
}

/*
                 #] DoPreAppendPath : 
                 #[ DoPrePrependPath :
*/

/**
 * Prepends the given path (absolute or relative to the current file directory)
 * to the FORM path.
 *
 * Syntax:
 *   #prependpath <path>
 */
int DoPrePrependPath(UBYTE *s)
{
        return DoAddPath(s, 1);
}

/*
                 #] DoPrePrependPath : 
                 #[ DoTimeOutAfter :

                Executes the #timeoutafter number
*/

int DoTimeOutAfter(UBYTE *s)
{
#ifdef WITH_ALARM
        ULONG x;
#else
        DUMMYUSE(s);
#endif
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
#ifdef WITH_ALARM
        while ( *s == ' ' || *s == '\t' ) s++;
        x = 0;
        while ( FG.cTable[*s] == 1 ) {
                x = 10*x + (*s++-'0');
        }
        while ( *s == ' ' || *s == '\t' ) s++;
        if ( *s  == 0 ) {
                alarm(x);
                return(0);
        }
        else {
                MesPrint("@proper syntax is #TimeoutAfter number");
                return(-1);
        }
#else
        Error0("#timeoutafter not implemented on this computer/system");
        return(-1);
#endif
}

/*
                 #] DoTimeOutAfter : 
                 #[ DoNamespace :

                Syntax:
                        #Namespace name
                                .....
                        #use variables
                                .....
                        #EndNamespace
                Effect:
                        All variables/expressions defined inside the range of the
                        namespace get name_ prepended.
                        This holds also for $-variables, names of procedures and 
                        names of files.
                Namespaces can be used in a nested way. cf this_is_deep_x
                A leading _ takes the role of what is super:: in some other languages.
                Remarks:
                        Names of preprocessor variables are excluded!
                        Names of built in objects are excluded! (like sum_, d_ etc.)
*/

int DoNamespace(UBYTE *s)
{
        UBYTE *s1, *s2, c;
        NAMESPACE *namespace;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == ',' || *s == '\t' ) s++;
        if ( FG.cTable[*s] != 0 ) {
                MesPrint("@Illegal name in #namespace instruction: %s",s);
                return(-1);
        }
        s1 = s;
        while ( FG.cTable[*s1] <= 1 ) s1++;
        s2 = s1;
        while ( *s2 == ' ' || *s2 == ',' || *s2 == '\t' ) s2++;
        if ( *s2 != 0 ) {
                MesPrint("@A #namespace instruction can only have one name with only alphanumeric characters.");
                return(-1);
        }
        c = *s1; *s1 = 0;
/*
        Now we have the name and the statement is legal.
        We can proceed creating the namespace and its use tree.
*/
        namespace = (NAMESPACE *)Malloc1(sizeof(NAMESPACE),"namespace");
        namespace->name = strDup1(s,"namespace_name");
        namespace->usenames = MakeNameTree();
        if ( AP.firstnamespace == 0 ) {
                namespace->previous = 0;
                namespace->next = 0;
                AP.firstnamespace = namespace;
                AP.lastnamespace = namespace;
        }
        else {
                AP.lastnamespace->next = namespace;
                namespace->next = 0;
                namespace->previous = AP.lastnamespace;
                AP.lastnamespace = namespace;
        }
        *s1 = c;
        return(0);
}

/*
                 #] DoNamespace : 
                 #[ DoEndNamespace :
*/

int DoEndNamespace(UBYTE *s)
{
        NAMESPACE *namespace;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ' ' || *s == ',' || *s == '\t' ) s++;
        if ( *s != 0 ) {
                MesPrint("@Illegal #endnamespace instruction");
                return(-1);
        }
        namespace = AP.lastnamespace;
        AP.lastnamespace = namespace->previous;
        M_free(namespace->name,"namespace_name");
        FreeNameTree(namespace->usenames);
        M_free(namespace,"namespace");
        return(0);
}

/*
                 #] DoEndNamespace : 
                 #[ SkipName :
*/

UBYTE *SkipName(UBYTE *s)
{
        UBYTE *t = s, *s1, c;
        int num = 0, block = 0;
        if ( *s == '[' ) {
straight:
                SKIPBRA1(s)
                if ( *s == 0 ) {
                        MesPrint("&Illegal name: '%s'",t);
                        return(0);
                }
                s++; s1 = s;
                while ( FG.cTable[*s] <= 1 || *s == '_' ) s++;
                if ( s1 != s ) goto witherror;
        }
        else if ( *s == '$' ) {
                s++;
                while ( *s == '_' ) { s++; num++; }
                block = 1;
                while ( FG.cTable[*s] <= 1 || *s == '_' ) {
                        if ( FG.cTable[*s] != 0 && block == 1 ) {
blocked:
                                MesPrint("&Illegally formed name: %s",t);
                                return(0);
                        }
                        if ( *s == '_' ) { num++; block = 1; }
                        else block = 0;
                        s++;
                }
                if ( s[-1] == '_' && num > 1 ) goto built;
        }
        else if ( FG.cTable[*s] == 0 ) {
regular:
                while ( FG.cTable[*s] <= 1 || *s == '_' ) {
                        if ( FG.cTable[*s] != 0 && block == 1 ) goto blocked;
                        if ( *s == '_' ) { block = 1; num++; }
                        else block = 0;
                        s++;
                }
                if ( *s == '[' ) goto straight;
                if ( s[-1] == '_' && num > 1 ) {
built:
                        c = *s; *s = 0;
                        MesPrint("&Built in objects cannot be part of namespaces: %s",t);
                        *s = c;
                        return(0);
                }
        }
        else if ( *s == '_' ) {
                while ( *s == '_' ) { s++; num++; }
                if ( FG.cTable[*s] == 0 ) { block = 0; goto regular; }
                goto witherror;
        }
        else if ( *s == '@' ) {
                s++; block = 1;
                if ( *s == '_' || FG.cTable[*s] == 1 ) {
                        MesPrint("@Illegally formed name: %s",s-1);
                }
                goto regular;
        }
        else if ( *s == '#' ) {        /* name of a procedure */
                s++;
                while ( *s == '_' ) { s++; num++; }
                block = 1;
                while ( FG.cTable[*s] <= 1 || *s == '_' ) {
                        if ( FG.cTable[*s] != 0 && block == 1 ) goto blocked;
                        if ( *s == '_' ) { num++; block = 1; }
                        else block = 0;
                        s++;
                }
                if ( s[-1] == '_' ) {
witherror:
                        c = *s; *s = 0;
                        MesPrint("&Illegally formed name: %s",t);
                        *s = c;
                        return(0);
                }
        }
        else if ( *s == '<' ) {        /* name of a file. Can be anything (more or less) */
                s++;
                while ( *s && *s != '>' ) s++;
                if ( *s != '>' ) goto witherror;
                s++;
        }
        return(s);
}

/*
                 #] SkipName : 
                 #[ ConstructName :

                Routine gets a 'raw' name and modifies it if the namespace
                settings ask for it. It puts the new name in a buffer that
                may be expanded if the names become rather long.
                Note that eventually that name needs to be copied, because
                we do not allocate new buffers for each name.

                type tells what kind of name we look for
*/

UBYTE *ConstructName(UBYTE *s,UBYTE type)
{
        int len;
        UBYTE *t, *u;
        WORD number;
        NAMESPACE *namespace;
        if ( AP.lastnamespace == 0 ) return(s);
        if ( *s == '@' ) return(s+1);
        if ( GetName(AP.lastnamespace->usenames,s,&number,NOAUTO) !=
                        NAMENOTFOUND ) return(s);
/*
        Now the real stuff
        First we have to compute the size of the new name.
*/
        len = StrLen(s) + 1;
        namespace = AP.firstnamespace;
        while ( namespace ) {
                len += StrLen(namespace->name)+1;
                namespace = namespace->previous;
        }
        if ( len > AP.fullnamesize ) {
                while ( len > AP.fullnamesize ) AP.fullnamesize *= 2;
                M_free(AP.fullname,"AP.fullname");
                AP.fullname = (UBYTE *)Malloc1(AP.fullnamesize*sizeof(UBYTE *),"AP.fullname");
        }
        namespace = AP.firstnamespace;
        t = AP.fullname;
        switch ( type ) {
                case ' ':
                case 0:
                        while ( namespace ) {
                                u = namespace->name;
                                while ( *u ) *t++ = *u++;
                                *t++ = '_';
                                namespace = namespace->previous;
                        }
                        while ( *s ) *t++ = *s++;
                        *t = 0;
                        break;
                case '$':
                case '#':
                        *t++ = type;
                        while ( namespace ) {
                                u = namespace->name;
                                while ( *u ) *t++ = *u++;
                                *t++ = '_';
                                namespace = namespace->previous;
                        }
                        if ( type == '$' ) s++;
                        while ( *s ) *t++ = *s++;
                        *t = 0;
                        break;
                case '<':
                        while ( namespace ) {
                                u = namespace->name;
                                while ( *u ) *t++ = *u++;
                                *t++ = '_';
                                namespace = namespace->previous;
                        }
                        s++;
                        while ( *s ) *t++ = *s++;
                        t--;  /* strip the '>' */
                        *t = 0;
                        break;
                default:
                        MesPrint("&Unrecognized datatype in ConstructName");
                        *t = 0;
                        break;
        }
        return(AP.fullname);
}

/*
                 #] ConstructName : 
                 #[ DoUse :

                Routine makes (inside the confines of the current namespace)
                a list of variables that are excluded from the namespace.
                Once the namespace is ended, the list is removed.
                The list can include names of variables, dollars and procedures.
                Preprocessor variables are excluded from the namespace. Their
                inclusion would be too complicated for the input streams.
                Note that the preprocessor variables that are arguments in a #do
                or in a procedure are on a stack and should not cause problems.
                Names of variables can be just that.
                Names of $-variables are also straightforward.
                Names of procedures should be preceeded by a # character.
                Names of files (like in #include) should be enclosed by <>.
                The names are stored in a balanced tree. Each namespace may have
                its own tree. The toplevel (no namespace) does not allow a #use.
*/

int DoUse(UBYTE *s)
{
        NAMESPACE *namespace;
        UBYTE *t, c;
        int number;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AP.lastnamespace == 0 ) {
                MesPrint("@It is not allowed to use #use outside the scope of a namespace.");
                return(-1);
        }
        namespace = AP.lastnamespace;
        while ( *s == ' ' || *s == ',' || *s == '\t' ) s++;
        while ( *s ) {
                t = s;
                if ( ( s = SkipName(t) ) == 0 ) return(-1);
                if ( s == t ) {
                        MesPrint("@Unrecognized object in #use instruction: %s",t);
                        return(-1);
                }
                c = *s; *s = 0;
/*
                In usenames we only need the names to know whether they are 'protected'.
                We need to keep the $, # and <> to avoid potential double names.
*/
                AddName(namespace->usenames,t,0,0,&number);
                *s = c;
                while ( *s == ' ' || *s == ',' || *s == '\t' ) s++;
        }
        return(0);
}

/*
                 #] DoUse : 
                 #[ UserFlags :
 
        Syntax:
                #ClearFlag number(s),expression(s)
                #ClearFlag number(s)
                #ClearFlag expression(s)
                #ClearFlag
                #SetFlag number(s),expression(s)
                #SetFlag number(s)
                #SetFlag expression(s)
                #SetFlag
                par == 0: Clear, par == 1: Set.
*/

int UserFlags(UBYTE *s,int par)
{
        int mask = 0, error = 0, i;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
        if ( *s == 0 ) {        /* Treat all flags in all active expressions */
allexpr:
                for ( i = 0; i < NumExpressions; i++ ) {
                        switch ( Expressions[i].status ) {
                                case UNHIDELEXPRESSION:
                                case UNHIDEGEXPRESSION:
                                case INTOHIDELEXPRESSION:
                                case INTOHIDEGEXPRESSION:
                                case LOCALEXPRESSION:
                                case GLOBALEXPRESSION:
                                case SKIPLEXPRESSION:
                                case SKIPGEXPRESSION:
                                case HIDELEXPRESSION:
                                case HIDEGEXPRESSION:
                                        if ( par == 1 ) Expressions[i].uflags |= ~mask;
                                        else            Expressions[i].uflags &= mask;
                                        break;
                                case DROPPEDEXPRESSION:
                                case DROPLEXPRESSION:
                                case DROPGEXPRESSION:
                                case DROPHLEXPRESSION:
                                case DROPHGEXPRESSION:
                                case STOREDEXPRESSION:
                                case HIDDENLEXPRESSION:
                                case HIDDENGEXPRESSION:
                                case SPECTATOREXPRESSION:
                                default:
                                        break;
                        }
                }
        }
        else if ( FG.cTable[*s] == 1 ) {
                mask = (int)WORDMASK;
                while ( FG.cTable[*s] == 1 ) {
                        int x = 0;
                        while ( FG.cTable[*s] == 1 ) { x = 10*x + (*s++-'0'); }
                        if ( x < 1 || x > BITSINWORD ) {
                                MesPrint("@Illegal number %d for flag in #...Flag instruction",x);
                                return(1);
                        }
                        mask ^= (1<<(x-1));
                        while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                }
                if ( *s == 0 ) goto allexpr;
        }
        else {        /* Clear all flags in all expressions that are specified */
                mask = (int)WORDMASK;
        }
        while ( *s ) { /* now read the expressions */
                UBYTE *s1, c;
                WORD num1;
                if ( FG.cTable[*s] != 0 && *s != '[' ) goto syntax;
                s1 = s; s = SkipAName(s);
                c = *s; *s = 0;
            if ( GetName(AC.exprnames,s1,&num1,NOAUTO) != CEXPRESSION ) {
                        MesPrint("@%s is not an active expression",s1);
                        error = 1;
                        return(error);
                }
                switch ( Expressions[num1].status ) {
                        case UNHIDELEXPRESSION:
                        case UNHIDEGEXPRESSION:
                        case INTOHIDELEXPRESSION:
                        case INTOHIDEGEXPRESSION:
                        case LOCALEXPRESSION:
                        case GLOBALEXPRESSION:
                        case SKIPLEXPRESSION:
                        case SKIPGEXPRESSION:
                        case HIDELEXPRESSION:
                        case HIDEGEXPRESSION:
                                if ( par == 1 ) Expressions[num1].uflags |= ~mask;
                                else            Expressions[num1].uflags &= mask;
                                break;
                        case DROPPEDEXPRESSION:
                        case DROPLEXPRESSION:
                        case DROPGEXPRESSION:
                        case DROPHLEXPRESSION:
                        case DROPHGEXPRESSION:
                        case STOREDEXPRESSION:
                        case HIDDENLEXPRESSION:
                        case HIDDENGEXPRESSION:
                        case SPECTATOREXPRESSION:
                        default:
                                MesPrint("@%s is not an active expression",s1);
                                error = 1;
                                break;
                }
                *s = c;
                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
        }
        return(error);
syntax:
        MesPrint("@Illegal name in #...Flag instruction.");
        return(1);
}

/*
                 #] UserFlags : 
                 #[ DoClearUserFlag :
*/

int DoClearUserFlag(UBYTE *s)
{
        return(UserFlags(s,0));
}

/*
                 #] DoClearUserFlag : 
                 #[ DoSetUserFlag :
*/

int DoSetUserFlag(UBYTE *s)
{
        return(UserFlags(s,1));
}

/*
                 #] DoSetUserFlag : 
                 #[ DoStartFloat :

                If there is a number follwing, it will be the new default precision.
                If float has been started before, the old one will be removed first.
                If there are two numbers, the second one is the maximum weight for
                MZV's.
*/
#ifdef WITHFLOAT

int DoStartFloat(UBYTE *s)
{
        GETIDENTITY
        int error = 0;
        LONG x;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        if ( AR.PolyFun != 0 ) {
                MesPrint("@Simultaneous use of Poly(Rat)Fun and float_ is not allowed.");
                error = 1;
        }
        if ( AC.ncmod != 0 ) {
                MesPrint("@Simultaneous use of floating point and modulus arithmetic makes no sense.");
                error = 1;
        }
        while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
        if ( *s >= '0' && *s <= '9' ) {
                x = 0;
                do {
                        x = 10*x + (*s++-'0');
                } while ( *s >= '0' && *s <= '9' );
                AC.tDefaultPrecision = x;
                while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                if ( *s >= '0' && *s <= '9' ) {
                        x = 0;
                        do {
                                x = 10*x + (*s++ - '0');
                        } while ( *s >= '0' && *s <= '9' );
                        AC.tMaxWeight = x;
                        while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
                }
                else {
                        AC.tMaxWeight = 0;
                }
                if ( *s ) goto IllPar;
        }
        else if ( *s != 0 ) {
IllPar:
                MesPrint("@Illegal parameter in %#StartFloat instruction: %s ",s);
                error = 1;
        }
        if ( error == 0 ) {
                if ( AC.tDefaultPrecision && ( AC.tDefaultPrecision != AC.DefaultPrecision
                || AT.aux_ == 0 ) ) {
                        AC.DefaultPrecision = AC.tDefaultPrecision;
                        AC.tDefaultPrecision = 0;
                }
                if ( AC.tMaxWeight && ( AC.tMaxWeight != AC.MaxWeight
                || AT.aux_ == 0 ) ) {
                        AC.MaxWeight = AC.tMaxWeight;
                        AC.tMaxWeight = 0;
                }
                SetupMPFTables();
                if ( AC.MaxWeight > 0 ) SetupMZVTables();
                SetfFloatPrecision(AC.DefaultPrecision);
        }
        else {
                AC.tDefaultPrecision = 0;
                AC.tMaxWeight = 0;
        }
        return(error);
}

#endif
/*
                 #] DoStartFloat : 
                 #[ DoEndFloat :
*/
#ifdef WITHFLOAT

int DoEndFloat(UBYTE *s)
{
        int error = 0;
        if ( AP.PreSwitchModes[AP.PreSwitchLevel] != EXECUTINGPRESWITCH ) return(0);
        if ( AP.PreIfStack[AP.PreIfLevel] != EXECUTINGIF ) return(0);
        while ( *s == ',' || *s == ' ' || *s == '\t' ) s++;
        if ( *s != 0 ) {
                MesPrint("@Illegal parameter in %#EndFloat instruction: %s ",s);
                error = 1;
        }
        if ( error == 0 ) {
                ClearfFloat();
                ClearMZVTables();
        }
        return(error);
}

#endif
/*
                 #] DoEndFloat : 
         # ] PreProcessor :
*/

tueda / form / 15241916852

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