27405271896

Committed 12 Jun 2026 08:49AM UTC coverage: 87.793% (-0.3%) from 88.114%

Build # 27405271896

Build Type

Pull #252

github

Committed by

web-flow

Commit Message

Merge 9be23187a into 0a94b5ba4

Pull Request Pull Request #252: Allow schema changes in diffs

Coverage Stats

1096 of 1222 new or added lines in 13 files covered. (89.69%)

13 existing lines in 3 files now uncovered.

4272 of 4866 relevant lines covered (87.79%)

615.33 hits per line

Source File
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94.44

/geodiff/src/changesetwriter.cpp

/*
 GEODIFF - MIT License
 Copyright (C) 2020 Martin Dobias
*/

#include "changesetwriter.h"

#include "changeset.h"
#include "geodiffutils.hpp"
#include "changesetputvarint.h"
#include "portableendian.h"

#include <assert.h>
#include <memory.h>

#include <sstream>
#include <variant>

void ChangesetWriter::open( const std::string &filename )
{
#ifdef WIN32
  mFile.open( stringToWString( filename ), std::ios::out | std::ios::binary );
#else
  mFile.open( filename, std::ios::out | std::ios::binary );
#endif
  if ( !mFile.is_open() )
    throw GeoDiffException( "Unable to open changeset file for writing: " + filename );
}

void ChangesetWriter::beginTable( const ChangesetTable &table )
{
  mCurrentTable = table;

  writeByte( ( int ) ChangesetEntryType::OpTableRecord );
  writeVarint( ( int ) table.columnCount() );
  for ( size_t i = 0; i < table.columnCount(); ++i )
    writeByte( table.primaryKeys[i] );
  writeNullTerminatedString( table.name );
}

void ChangesetWriter::writeEntry( const ChangesetEntry &entry )
{
  if ( const ChangesetDataEntry *dataEntry = std::get_if<ChangesetDataEntry>( &entry ) )
    writeDataEntry( *dataEntry );
  else if ( const ChangesetCreateTableEntry *ctEntry = std::get_if<ChangesetCreateTableEntry>( &entry ) )
    writeCreateTableEntry( *ctEntry );
  else if ( const ChangesetDropTableEntry *dtEntry = std::get_if<ChangesetDropTableEntry>( &entry ) )
    writeDropTableEntry( *dtEntry );
  else if ( const ChangesetAddColumnEntry *acEntry = std::get_if<ChangesetAddColumnEntry>( &entry ) )
    writeAddColumnEntry( *acEntry );
  else if ( const ChangesetDropColumnEntry *dcEntry = std::get_if<ChangesetDropColumnEntry>( &entry ) )
    writeDropColumnEntry( *dcEntry );
  else
    throw GeoDiffException( "Tried to write unhandled changeset entry type! " +
                            std::to_string( entry.index() ) );
}

void ChangesetWriter::writeByte( char c )
{
  mFile.write( &c, 1 );
}

void ChangesetWriter::writeVarint( int n )
{
  unsigned char output[9];  // 1-9 bytes
  int numBytes = putVarint32( output, n );
  mFile.write( reinterpret_cast<char *>( output ), numBytes );
}

void ChangesetWriter::writeNullTerminatedString( const std::string &str )
{
  mFile.write( str.c_str(), str.size() + 1 );
}

void ChangesetWriter::writeRowValues( const std::vector<Value> &values )
{
  if ( values.size() != mCurrentTable.columnCount() )
    throw GeoDiffException( "wrong number of rows in the entry" );

  for ( size_t i = 0; i < mCurrentTable.columnCount(); ++i )
  {
    Value::Type type = values[i].type();
    writeByte( ( char ) type );
    if ( type == Value::TypeInt ) // 0x01
    {
      // 64-bit int (big endian)
      uint64_t x;
      int64_t v = values[i].getInt();
      memcpy( &x, &v, 8 );
      x = htobe64( x ); // convert host to big endian
      mFile.write( reinterpret_cast<char *>( &x ), 8 );
    }
    else if ( type == Value::TypeDouble ) // 0x02
    {
      // 64-bit double (big endian)
      int64_t x;
      double v = values[i].getDouble();
      memcpy( &x, &v, 8 );
      x = htobe64( x ); // convert host to big endian
      mFile.write( reinterpret_cast<char *>( &x ), 8 );
    }
    else if ( type == Value::TypeText || type == Value::TypeBlob ) // 0x03 or 0x04
    {
      const std::string &str = values[i].getString();
      writeVarint( static_cast<int>( str.size() ) );
      mFile.write( str.c_str(), str.size() );
    }
    else if ( type == Value::TypeNull ) // 0x05
    {
      // nothing extra to write
    }
    else if ( type == Value::TypeUndefined )  // undefined value  (different from NULL)
    {
      // nothing extra to write
    }
    else
    {
      throw GeoDiffException( "unexpected entry type" );
    }
  }
}

void ChangesetWriter::writeColumnInfo( const TableColumnInfo &column )
{
  writeNullTerminatedString( column.name );
  writeByte( static_cast<char>( column.type.baseType ) );
  writeByte( ( column.isPrimaryKey << 0 )
             | ( column.isNotNull << 1 )
             | ( column.isAutoIncrement << 2 )
             | ( column.isGeometry << 3 )
             | ( column.geomHasZ << 4 )
             | ( column.geomHasM << 5 ) );
  writeNullTerminatedString( column.geomType );
  writeVarint( column.geomSrsId );
}


void ChangesetWriter::writeDataEntry( const ChangesetDataEntry &entry )
{
  if ( entry.op != ChangesetDataEntry::OpInsert && entry.op != ChangesetDataEntry::OpUpdate && entry.op != ChangesetDataEntry::OpDelete )
    throw GeoDiffException( "wrong op for changeset entry" );
  writeByte( ( char ) entry.op );
  writeByte( 0 );  // "indirect" always false

  if ( entry.op != ( int ) ChangesetEntryType::OpInsert )
    writeRowValues( entry.oldValues );
  if ( entry.op != ( int ) ChangesetEntryType::OpDelete )
    writeRowValues( entry.newValues );
}

void ChangesetWriter::writeCreateTableEntry( const ChangesetCreateTableEntry &entry )
{
  writeByte( static_cast<char>( ChangesetEntryType::OpCreateTable ) );
  writeNullTerminatedString( entry.tableName );
  writeVarint( static_cast<int>( entry.columns.size() ) );
  for ( const TableColumnInfo &column : entry.columns )
  {
    writeColumnInfo( column );
  }
}

void ChangesetWriter::writeDropTableEntry( const ChangesetDropTableEntry &entry )
{
  writeByte( static_cast<char>( ChangesetEntryType::OpDropTable ) );
  writeNullTerminatedString( entry.tableName );
  writeVarint( static_cast<int>( entry.columns.size() ) );
  for ( const TableColumnInfo &column : entry.columns )
  {
    writeColumnInfo( column );
  }
}

void ChangesetWriter::writeAddColumnEntry( const ChangesetAddColumnEntry &entry )
{
  writeByte( static_cast<char>( ChangesetEntryType::OpAddColumn ) );
  writeNullTerminatedString( entry.tableName );
  writeColumnInfo( entry.column );
}

void ChangesetWriter::writeDropColumnEntry( const ChangesetDropColumnEntry &entry )
{
  writeByte( static_cast<char>( ChangesetEntryType::OpDropColumn ) );
  writeNullTerminatedString( entry.tableName );
  writeColumnInfo( entry.column );
}

1	/*
2	GEODIFF - MIT License
3	Copyright (C) 2020 Martin Dobias
4	*/
5
6	#include "changesetwriter.h"
7
8	#include "changeset.h"
9	#include "geodiffutils.hpp"
10	#include "changesetputvarint.h"
11	#include "portableendian.h"
12
13	#include <assert.h>
14	#include <memory.h>
15
16	#include <sstream>
17	#include <variant>
18
19	void ChangesetWriter::open( const std::string &filename )	542✔
20	{
21	#ifdef WIN32
22	mFile.open( stringToWString( filename ), std::ios::out \| std::ios::binary );
23	#else
24	mFile.open( filename, std::ios::out \| std::ios::binary );	542✔
25	#endif
26	if ( !mFile.is_open() )	542✔
27	throw GeoDiffException( "Unable to open changeset file for writing: " + filename );	×
28	}	542✔
29
30	void ChangesetWriter::beginTable( const ChangesetTable &table )	523✔
31	{
32	mCurrentTable = table;	523✔
33
34	writeByte( ( int ) ChangesetEntryType::OpTableRecord );	523✔
35	writeVarint( ( int ) table.columnCount() );	523✔
36	for ( size_t i = 0; i < table.columnCount(); ++i )	2,371✔
37	writeByte( table.primaryKeys[i] );	1,848✔
38	writeNullTerminatedString( table.name );	523✔
39	}	523✔
40
41	void ChangesetWriter::writeEntry( const ChangesetEntry &entry )	987✔
42	{
43	if ( const ChangesetDataEntry *dataEntry = std::get_if<ChangesetDataEntry>( &entry ) )	987✔
44	writeDataEntry( *dataEntry );	956✔
45	else if ( const ChangesetCreateTableEntry *ctEntry = std::get_if<ChangesetCreateTableEntry>( &entry ) )	31✔
46	writeCreateTableEntry( *ctEntry );	8✔
47	else if ( const ChangesetDropTableEntry *dtEntry = std::get_if<ChangesetDropTableEntry>( &entry ) )	23✔
48	writeDropTableEntry( *dtEntry );	6✔
49	else if ( const ChangesetAddColumnEntry *acEntry = std::get_if<ChangesetAddColumnEntry>( &entry ) )	17✔
50	writeAddColumnEntry( *acEntry );	9✔
51	else if ( const ChangesetDropColumnEntry *dcEntry = std::get_if<ChangesetDropColumnEntry>( &entry ) )	8✔
52	writeDropColumnEntry( *dcEntry );	8✔
53	else
NEW 54	throw GeoDiffException( "Tried to write unhandled changeset entry type! " +	×
NEW 55	std::to_string( entry.index() ) );	×
56	}	987✔
57
58	void ChangesetWriter::writeByte( char c )	8,648✔
59	{
60	mFile.write( &c, 1 );	8,648✔
61	}	8,648✔
62
63	void ChangesetWriter::writeVarint( int n )	2,117✔
64	{
65	unsigned char output[9]; // 1-9 bytes
66	int numBytes = putVarint32( output, n );	2,117✔
67	mFile.write( reinterpret_cast<char *>( output ), numBytes );	2,117✔
68	}	2,117✔
69
70	void ChangesetWriter::writeNullTerminatedString( const std::string &str )	672✔
71	{
72	mFile.write( str.c_str(), str.size() + 1 );	672✔
73	}	672✔
74
75	void ChangesetWriter::writeRowValues( const std::vector<Value> &values )	1,185✔
76	{
77	if ( values.size() != mCurrentTable.columnCount() )	1,185✔
78	throw GeoDiffException( "wrong number of rows in the entry" );	×
79
80	for ( size_t i = 0; i < mCurrentTable.columnCount(); ++i )	5,401✔
81	{
82	Value::Type type = values[i].type();	4,216✔
83	writeByte( ( char ) type );	4,216✔
84	if ( type == Value::TypeInt ) // 0x01	4,216✔
85	{
86	// 64-bit int (big endian)
87	uint64_t x;
88	int64_t v = values[i].getInt();	1,560✔
89	memcpy( &x, &v, 8 );	1,560✔
90	x = htobe64( x ); // convert host to big endian	1,560✔
91	mFile.write( reinterpret_cast<char *>( &x ), 8 );	1,560✔
92	}
93	else if ( type == Value::TypeDouble ) // 0x02	2,656✔
94	{
95	// 64-bit double (big endian)
96	int64_t x;
97	double v = values[i].getDouble();	35✔
98	memcpy( &x, &v, 8 );	35✔
99	x = htobe64( x ); // convert host to big endian	35✔
100	mFile.write( reinterpret_cast<char *>( &x ), 8 );	35✔
101	}
102	else if ( type == Value::TypeText \|\| type == Value::TypeBlob ) // 0x03 or 0x04	2,621✔
103	{
104	const std::string &str = values[i].getString();	1,521✔
105	writeVarint( static_cast<int>( str.size() ) );	1,521✔
106	mFile.write( str.c_str(), str.size() );	1,521✔
107	}	1,521✔
108	else if ( type == Value::TypeNull ) // 0x05	1,100✔
109	{
110	// nothing extra to write
111	}
112	else if ( type == Value::TypeUndefined ) // undefined value (different from NULL)	833✔
113	{
114	// nothing extra to write
115	}
116	else
117	{
118	throw GeoDiffException( "unexpected entry type" );	×
119	}
120	}
121	}	1,185✔
122
123	void ChangesetWriter::writeColumnInfo( const TableColumnInfo &column )	59✔
124	{
125	writeNullTerminatedString( column.name );	59✔
126	writeByte( static_cast<char>( column.type.baseType ) );	59✔
127	writeByte( ( column.isPrimaryKey << 0 )	59✔
128	\| ( column.isNotNull << 1 )	59✔
129	\| ( column.isAutoIncrement << 2 )	59✔
130	\| ( column.isGeometry << 3 )	59✔
131	\| ( column.geomHasZ << 4 )	59✔
132	\| ( column.geomHasM << 5 ) );	59✔
133	writeNullTerminatedString( column.geomType );	59✔
134	writeVarint( column.geomSrsId );	59✔
135	}	59✔
136
137
138	void ChangesetWriter::writeDataEntry( const ChangesetDataEntry &entry )	956✔
139	{
140	if ( entry.op != ChangesetDataEntry::OpInsert && entry.op != ChangesetDataEntry::OpUpdate && entry.op != ChangesetDataEntry::OpDelete )	956✔
NEW 141	throw GeoDiffException( "wrong op for changeset entry" );	×
142	writeByte( ( char ) entry.op );	956✔
143	writeByte( 0 ); // "indirect" always false	956✔
144
145	if ( entry.op != ( int ) ChangesetEntryType::OpInsert )	956✔
146	writeRowValues( entry.oldValues );	401✔
147	if ( entry.op != ( int ) ChangesetEntryType::OpDelete )	956✔
148	writeRowValues( entry.newValues );	784✔
149	}	956✔
150
151	void ChangesetWriter::writeCreateTableEntry( const ChangesetCreateTableEntry &entry )	8✔
152	{
153	writeByte( static_cast<char>( ChangesetEntryType::OpCreateTable ) );	8✔
154	writeNullTerminatedString( entry.tableName );	8✔
155	writeVarint( static_cast<int>( entry.columns.size() ) );	8✔
156	for ( const TableColumnInfo &column : entry.columns )	32✔
157	{
158	writeColumnInfo( column );	24✔
159	}
160	}	8✔
161
162	void ChangesetWriter::writeDropTableEntry( const ChangesetDropTableEntry &entry )	6✔
163	{
164	writeByte( static_cast<char>( ChangesetEntryType::OpDropTable ) );	6✔
165	writeNullTerminatedString( entry.tableName );	6✔
166	writeVarint( static_cast<int>( entry.columns.size() ) );	6✔
167	for ( const TableColumnInfo &column : entry.columns )	24✔
168	{
169	writeColumnInfo( column );	18✔
170	}
171	}	6✔
172
173	void ChangesetWriter::writeAddColumnEntry( const ChangesetAddColumnEntry &entry )	9✔
174	{
175	writeByte( static_cast<char>( ChangesetEntryType::OpAddColumn ) );	9✔
176	writeNullTerminatedString( entry.tableName );	9✔
177	writeColumnInfo( entry.column );	9✔
178	}	9✔
179
180	void ChangesetWriter::writeDropColumnEntry( const ChangesetDropColumnEntry &entry )	8✔
181	{
182	writeByte( static_cast<char>( ChangesetEntryType::OpDropColumn ) );	8✔
183	writeNullTerminatedString( entry.tableName );	8✔
184	writeColumnInfo( entry.column );	8✔
185	}	8✔

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