20114228509

Committed 10 Dec 2025 09:44PM UTC coverage: 51.593% (+6.9%) from 44.65%

Build # 20114228509

Build Type

push

github

Committed by

saitoha

Commit Message

tests: temporarily skip oversized python error scenario

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11613 of 40017 branches covered (29.02%)

19771 of 38321 relevant lines covered (51.59%)

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Source File
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86.92

/src/loader-builtin.c

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2021-2025 libsixel developers. See `AUTHORS`.
 * Copyright (c) 2014-2019 Hayaki Saito
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Builtin loader covering SIXEL, PNM, GIF, and stb_image fallbacks.  This
 * module keeps the heavyweight stb_image implementation isolated from the
 * registry so other backends avoid pulling in its macros and includes.
 */

#include "config.h"

/* STDC_HEADERS */
#include <stdio.h>
#include <stdlib.h>

#if HAVE_STRING_H
# include <string.h>
#endif
#if HAVE_CTYPE_H
# include <ctype.h>
#endif
#if HAVE_LIMITS_H
# include <limits.h>
#endif

#include <sixel.h>

#include "allocator.h"
#include "chunk.h"
#include "frame.h"
#include "fromgif.h"
#include "frompnm.h"
#include "pixelformat.h"
#include "loader-builtin.h"
#include "loader-common.h"
#include "loader.h"

static sixel_allocator_t *stbi_allocator;

void *
stbi_malloc(size_t n)
{
    return sixel_allocator_malloc(stbi_allocator, n);
}

void *
stbi_realloc(void *p, size_t n)
{
    return sixel_allocator_realloc(stbi_allocator, p, n);
}

void
stbi_free(void *p)
{
    sixel_allocator_free(stbi_allocator, p);
}

#define STBI_MALLOC stbi_malloc
#define STBI_REALLOC stbi_realloc
#define STBI_FREE stbi_free

#define STBI_NO_STDIO 1
#define STB_IMAGE_IMPLEMENTATION 1
#define STBI_FAILURE_USERMSG 1
#if defined(_WIN32)
# define STBI_NO_THREAD_LOCALS 1  /* no tls */
#endif
#define STBI_NO_GIF
#define STBI_NO_PNM

#if HAVE_DIAGNOSTIC_SIGN_CONVERSION
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wsign-conversion"
#endif
#if HAVE_DIAGNOSTIC_STRICT_OVERFLOW
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wstrict-overflow"
#endif
#if HAVE_DIAGNOSTIC_SWITCH_DEFAULT
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wswitch-default"
#endif
#if HAVE_DIAGNOSTIC_SHADOW
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wshadow"
#endif
#if HAVE_DIAGNOSTIC_DOUBLE_PROMOTION
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wdouble-promotion"
#endif
#if HAVE_DIAGNOSTIC_UNUSED_FUNCTION
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wunused-function"
#endif
#if HAVE_DIAGNOSTIC_UNUSED_BUT_SET_VARIABLE
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wunused-but-set-variable"
#endif
#include "stb_image.h"
#if HAVE_DIAGNOSTIC_UNUSED_BUT_SET_VARIABLE
# pragma GCC diagnostic pop
#endif
#if HAVE_DIAGNOSTIC_UNUSED_FUNCTION
# pragma GCC diagnostic pop
#endif
#if HAVE_DIAGNOSTIC_DOUBLE_PROMOTION
# pragma GCC diagnostic pop
#endif
#if HAVE_DIAGNOSTIC_SHADOW
# pragma GCC diagnostic pop
#endif
#if HAVE_DIAGNOSTIC_SWITCH_DEFAULT
# pragma GCC diagnostic pop
#endif
#if HAVE_DIAGNOSTIC_STRICT_OVERFLOW
# pragma GCC diagnostic pop
#endif
#if HAVE_DIAGNOSTIC_SIGN_CONVERSION
# pragma GCC diagnostic pop
#endif

static SIXELSTATUS
load_sixel(unsigned char        /* out */ **result,
           unsigned char        /* in */  *buffer,
           int                  /* in */  size,
           int                  /* out */ *psx,
           int                  /* out */ *psy,
           unsigned char        /* out */ **ppalette,
           int                  /* out */ *pncolors,
           int                  /* in */  reqcolors,
           int                  /* out */ *ppixelformat,
           sixel_allocator_t    /* in */  *allocator)
{
    SIXELSTATUS status;
    unsigned char *decoded_pixels;
    unsigned char *decoded_palette;
    size_t image_bytes;

    if (result == NULL || pncolors == NULL || ppixelformat == NULL ||
            allocator == NULL) {
        return SIXEL_BAD_ARGUMENT;
    }

    status = SIXEL_FALSE;
    decoded_pixels = NULL;
    decoded_palette = NULL;
    image_bytes = 0;

    status = sixel_decode_raw(buffer,
                              size,
                              &decoded_pixels,
                              psx,
                              psy,
                              &decoded_palette,
                              pncolors,
                              allocator);
    if (loader_trace_is_enabled()) {
        loader_trace_message("load_sixel: sixel_decode_raw -> %d",
                             (int)status);
    }
    if (SIXEL_FAILED(status)) {
        goto end;
    }

    image_bytes = (size_t)(*psx) * (size_t)(*psy);

    if (ppalette == NULL ||
            (reqcolors > 0 && *pncolors > reqcolors)) {
        size_t rgb_bytes;
        size_t index;

        if (decoded_palette == NULL) {
            status = SIXEL_BAD_INPUT;
            goto end;
        }
        rgb_bytes = image_bytes * 3u;
        *result = sixel_allocator_malloc(allocator, rgb_bytes);
        if (*result == NULL) {
            sixel_helper_set_additional_message(
                "load_sixel: sixel_allocator_malloc() failed.");
            status = SIXEL_BAD_ALLOCATION;
            goto end;
        }
        for (index = 0; index < image_bytes; ++index) {
            size_t palette_index;
            size_t pixel_offset;

            palette_index = decoded_pixels[index] * 3u;
            pixel_offset = index * 3u;
            (*result)[pixel_offset + 0] = decoded_palette[palette_index + 0];
            (*result)[pixel_offset + 1] = decoded_palette[palette_index + 1];
            (*result)[pixel_offset + 2] = decoded_palette[palette_index + 2];
        }
        *ppixelformat = SIXEL_PIXELFORMAT_RGB888;
    } else {
        *result = decoded_pixels;
        decoded_pixels = NULL;
        *ppalette = decoded_palette;
        decoded_palette = NULL;
        *ppixelformat = SIXEL_PIXELFORMAT_PAL8;
    }
    status = SIXEL_OK;

end:
    if (decoded_pixels != NULL) {
        sixel_allocator_free(allocator, decoded_pixels);
        decoded_pixels = NULL;
    }
    if (decoded_palette != NULL) {
        sixel_allocator_free(allocator, decoded_palette);
        decoded_palette = NULL;
    }

    return status;
}

static int
chunk_is_sixel(sixel_chunk_t const *chunk)
{
    unsigned char *p;
    unsigned char *end;

    p = chunk->buffer;
    end = p + chunk->size;

    if (chunk->size < 3) {
        return 0;
    }

    p++;
    if (p >= end) {
        return 0;
    }
    if (*(p - 1) == 0x90 || (*(p - 1) == 0x1b && *p == 0x50)) {
        while (p++ < end) {
            if (*p == 0x71) {
                return 1;
            } else if (*p == 0x18 || *p == 0x1a) {
                return 0;
            } else if (*p < 0x20) {
                continue;
            } else if (*p < 0x30) {
                return 0;
            } else if (*p < 0x40) {
                continue;
            }
        }
    }
    return 0;
}

static int
chunk_is_pnm(sixel_chunk_t const *chunk)
{
    if (chunk->size < 2) {
        return 0;
    }
    if (chunk->buffer[0] == 'P' &&
        chunk->buffer[1] >= '1' &&
        chunk->buffer[1] <= '6') {
        return 1;
    }
    return 0;
}

typedef union _fn_pointer {
    sixel_load_image_function fn;
    void *                    p;
} fn_pointer;

SIXELSTATUS
load_with_builtin(
    sixel_chunk_t const *pchunk,
    int fstatic,
    int fuse_palette,
    int reqcolors,
    unsigned char *bgcolor,
    int loop_control,
    sixel_load_image_function fn_load,
    void *context)
{
    SIXELSTATUS status;
    unsigned char *pixels;
    int depth;
    sixel_frame_t *frame;
    fn_pointer fnp;
    stbi__context stb_context;
    char message[80];
    int nwrite;

    status = SIXEL_BAD_INPUT;
    pixels = NULL;
    depth = 0;
    frame = NULL;
    fnp.fn = NULL;
    stb_context = (stbi__context){ 0 };
    nwrite = 0;

    if (pchunk == NULL) {
        status = SIXEL_BAD_ARGUMENT;
        goto end;
    }

    if (chunk_is_sixel(pchunk)) {
        status = sixel_frame_new(&frame, pchunk->allocator);
        if (SIXEL_FAILED(status)) {
            goto end;
        }
        if (pchunk->size > INT_MAX) {
            status = SIXEL_BAD_INTEGER_OVERFLOW;
            goto end;
        }
        status = load_sixel(&pixels,
                            pchunk->buffer,
                            (int)pchunk->size,
                            &frame->width,
                            &frame->height,
                            fuse_palette ? &frame->palette: NULL,
                            &frame->ncolors,
                            reqcolors,
                            &frame->pixelformat,
                            pchunk->allocator);
        if (SIXEL_FAILED(status)) {
            goto end;
        }
        sixel_frame_set_pixels(frame, pixels);
    } else if (chunk_is_pnm(pchunk)) {
        status = sixel_frame_new(&frame, pchunk->allocator);
        if (SIXEL_FAILED(status)) {
            goto end;
        }
        if (pchunk->size > INT_MAX) {
            status = SIXEL_BAD_INTEGER_OVERFLOW;
            goto end;
        }
        status = load_pnm(pchunk->buffer,
                          (int)pchunk->size,
                          frame->allocator,
                          &pixels,
                          &frame->width,
                          &frame->height,
                          fuse_palette ? &frame->palette: NULL,
                          &frame->ncolors,
                          &frame->pixelformat);
        if (SIXEL_FAILED(status)) {
            goto end;
        }
        sixel_frame_set_pixels(frame, pixels);
    } else if (chunk_is_gif(pchunk)) {
        fnp.fn = fn_load;
        if (pchunk->size > INT_MAX) {
            status = SIXEL_BAD_INTEGER_OVERFLOW;
            goto end;
        }
        status = load_gif(pchunk->buffer,
                          (int)pchunk->size,
                          bgcolor,
                          reqcolors,
                          fuse_palette,
                          fstatic,
                          loop_control,
                          fnp.p,
                          context,
                          pchunk->allocator);
        if (SIXEL_FAILED(status)) {
            goto end;
        }
        goto end;
    } else {
        status = sixel_frame_new(&frame, pchunk->allocator);
        if (SIXEL_FAILED(status)) {
            goto end;
        }
        if (pchunk->size > INT_MAX) {
            status = SIXEL_BAD_INTEGER_OVERFLOW;
            goto end;
        }
        stbi_allocator = pchunk->allocator;
        stbi__start_mem(&stb_context,
                        pchunk->buffer,
                        (int)pchunk->size);
        pixels = stbi__load_and_postprocess_8bit(&stb_context,
                                                 &frame->width,
                                                 &frame->height,
                                                 &depth,
                                                 3);
        if (pixels == NULL) {
            sixel_helper_set_additional_message(stbi_failure_reason());
            status = SIXEL_STBI_ERROR;
            goto end;
        }
        sixel_frame_set_pixels(frame, pixels);
        frame->loop_count = 1;
        switch (depth) {
        case 1:
        case 3:
        case 4:
            frame->pixelformat = SIXEL_PIXELFORMAT_RGB888;
            break;
        default:
            nwrite = snprintf(message,
                              sizeof(message),
                              "load_with_builtin() failed.\n"
                              "reason: unknown pixel-format.(depth: %d)\n",
                              depth);
            if (nwrite > 0) {
                sixel_helper_set_additional_message(message);
            }
            status = SIXEL_STBI_ERROR;
            goto end;
        }
    }

    status = sixel_frame_strip_alpha(frame, bgcolor);
    if (SIXEL_FAILED(status)) {
        goto end;
    }

    status = fn_load(frame, context);
    if (SIXEL_FAILED(status)) {
        goto end;
    }

    status = SIXEL_OK;

end:
    sixel_frame_unref(frame);

    return status;
}

/* emacs Local Variables:      */
/* emacs mode: c               */
/* emacs tab-width: 4          */
/* emacs indent-tabs-mode: nil */
/* emacs c-basic-offset: 4     */
/* emacs End:                  */
/* vim: set expandtab ts=4 sts=4 sw=4 : */
/* EOF */

1	/*
2	* SPDX-License-Identifier: MIT
3	*
4	* Copyright (c) 2021-2025 libsixel developers. See `AUTHORS`.
5	* Copyright (c) 2014-2019 Hayaki Saito
6	*
7	* Permission is hereby granted, free of charge, to any person obtaining a copy
8	* of this software and associated documentation files (the "Software"), to
9	* deal in the Software without restriction, including without limitation the
10	* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
11	* sell copies of the Software, and to permit persons to whom the Software is
12	* furnished to do so, subject to the following conditions:
13	*
14	* The above copyright notice and this permission notice shall be included in
15	* all copies or substantial portions of the Software.
16	*
17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22	* FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23	* DEALINGS IN THE SOFTWARE.
24	*
25	* Builtin loader covering SIXEL, PNM, GIF, and stb_image fallbacks. This
26	* module keeps the heavyweight stb_image implementation isolated from the
27	* registry so other backends avoid pulling in its macros and includes.
28	*/
29
30	#include "config.h"
31
32	/* STDC_HEADERS */
33	#include <stdio.h>
34	#include <stdlib.h>
35
36	#if HAVE_STRING_H
37	# include <string.h>
38	#endif
39	#if HAVE_CTYPE_H
40	# include <ctype.h>
41	#endif
42	#if HAVE_LIMITS_H
43	# include <limits.h>
44	#endif
45
46	#include <sixel.h>
47
48	#include "allocator.h"
49	#include "chunk.h"
50	#include "frame.h"
51	#include "fromgif.h"
52	#include "frompnm.h"
53	#include "pixelformat.h"
54	#include "loader-builtin.h"
55	#include "loader-common.h"
56	#include "loader.h"
57
58	static sixel_allocator_t *stbi_allocator;
59
60	void *
61	stbi_malloc(size_t n)	1,714✔
62	{
63	return sixel_allocator_malloc(stbi_allocator, n);	1,714✔
64	}
65
66	void *
67	stbi_realloc(void *p, size_t n)	612✔
68	{
69	return sixel_allocator_realloc(stbi_allocator, p, n);	612✔
70	}
71
72	void
73	stbi_free(void *p)	2,433✔
74	{
75	sixel_allocator_free(stbi_allocator, p);	2,277✔
76	}	1,725✔
77
78	#define STBI_MALLOC stbi_malloc
79	#define STBI_REALLOC stbi_realloc
80	#define STBI_FREE stbi_free
81
82	#define STBI_NO_STDIO 1
83	#define STB_IMAGE_IMPLEMENTATION 1
84	#define STBI_FAILURE_USERMSG 1
85	#if defined(_WIN32)
86	# define STBI_NO_THREAD_LOCALS 1 /* no tls */
87	#endif
88	#define STBI_NO_GIF
89	#define STBI_NO_PNM
90
91	#if HAVE_DIAGNOSTIC_SIGN_CONVERSION
92	# pragma GCC diagnostic push
93	# pragma GCC diagnostic ignored "-Wsign-conversion"
94	#endif
95	#if HAVE_DIAGNOSTIC_STRICT_OVERFLOW
96	# pragma GCC diagnostic push
97	# pragma GCC diagnostic ignored "-Wstrict-overflow"
98	#endif
99	#if HAVE_DIAGNOSTIC_SWITCH_DEFAULT
100	# pragma GCC diagnostic push
101	# pragma GCC diagnostic ignored "-Wswitch-default"
102	#endif
103	#if HAVE_DIAGNOSTIC_SHADOW
104	# pragma GCC diagnostic push
105	# pragma GCC diagnostic ignored "-Wshadow"
106	#endif
107	#if HAVE_DIAGNOSTIC_DOUBLE_PROMOTION
108	# pragma GCC diagnostic push
109	# pragma GCC diagnostic ignored "-Wdouble-promotion"
110	#endif
111	#if HAVE_DIAGNOSTIC_UNUSED_FUNCTION
112	# pragma GCC diagnostic push
113	# pragma GCC diagnostic ignored "-Wunused-function"
114	#endif
115	#if HAVE_DIAGNOSTIC_UNUSED_BUT_SET_VARIABLE
116	# pragma GCC diagnostic push
117	# pragma GCC diagnostic ignored "-Wunused-but-set-variable"
118	#endif
119	#include "stb_image.h"
120	#if HAVE_DIAGNOSTIC_UNUSED_BUT_SET_VARIABLE
121	# pragma GCC diagnostic pop
122	#endif
123	#if HAVE_DIAGNOSTIC_UNUSED_FUNCTION
124	# pragma GCC diagnostic pop
125	#endif
126	#if HAVE_DIAGNOSTIC_DOUBLE_PROMOTION
127	# pragma GCC diagnostic pop
128	#endif
129	#if HAVE_DIAGNOSTIC_SHADOW
130	# pragma GCC diagnostic pop
131	#endif
132	#if HAVE_DIAGNOSTIC_SWITCH_DEFAULT
133	# pragma GCC diagnostic pop
134	#endif
135	#if HAVE_DIAGNOSTIC_STRICT_OVERFLOW
136	# pragma GCC diagnostic pop
137	#endif
138	#if HAVE_DIAGNOSTIC_SIGN_CONVERSION
139	# pragma GCC diagnostic pop
140	#endif
141
142	static SIXELSTATUS
143	load_sixel(unsigned char /* out / *result,	209✔
144	unsigned char /* in / buffer,
145	int /* in */ size,
146	int /* out / psx,
147	int /* out / psy,
148	unsigned char /* out / *ppalette,
149	int /* out / pncolors,
150	int /* in */ reqcolors,
151	int /* out / ppixelformat,
152	sixel_allocator_t /* in / allocator)
153	{
154	SIXELSTATUS status;	209✔
155	unsigned char *decoded_pixels;	209✔
156	unsigned char *decoded_palette;	209✔
157	size_t image_bytes;	209✔
158
159	if (result == NULL \|\| pncolors == NULL \|\| ppixelformat == NULL \|\|	209!
160	allocator == NULL) {	209!
161	return SIXEL_BAD_ARGUMENT;
162	}
163
164	status = SIXEL_FALSE;	209✔
165	decoded_pixels = NULL;	209✔
166	decoded_palette = NULL;	209✔
167	image_bytes = 0;	209✔
168
169	status = sixel_decode_raw(buffer,	262✔
170	size,	53✔
171	&decoded_pixels,
172	psx,	53✔
173	psy,	53✔
174	&decoded_palette,
175	pncolors,	53✔
176	allocator);	53✔
177	if (loader_trace_is_enabled()) {	209✔
178	loader_trace_message("load_sixel: sixel_decode_raw -> %d",	4✔
179	(int)status);	1✔
180	}	1✔
181	if (SIXEL_FAILED(status)) {	209!
182	goto end;	×
183	}
184
185	image_bytes = (size_t)(psx) (size_t)(*psy);	209✔
186
187	if (ppalette == NULL \|\|	250!
188	(reqcolors > 0 && *pncolors > reqcolors)) {	161!
189	size_t rgb_bytes;	48✔
190	size_t index;	48✔
191
192	if (decoded_palette == NULL) {	48!
193	status = SIXEL_BAD_INPUT;	×
194	goto end;	×
195	}
196	rgb_bytes = image_bytes * 3u;	48✔
197	*result = sixel_allocator_malloc(allocator, rgb_bytes);	48✔
198	if (*result == NULL) {	48!
199	sixel_helper_set_additional_message(	×
200	"load_sixel: sixel_allocator_malloc() failed.");
201	status = SIXEL_BAD_ALLOCATION;	×
202	goto end;	×
203	}
204	for (index = 0; index < image_bytes; ++index) {	7,560,768✔
205	size_t palette_index;	7,560,720✔
206	size_t pixel_offset;	7,560,720✔
207
208	palette_index = decoded_pixels[index] * 3u;	7,560,720✔
209	pixel_offset = index * 3u;	7,560,720✔
210	(*result)[pixel_offset + 0] = decoded_palette[palette_index + 0];	7,560,720✔
211	(*result)[pixel_offset + 1] = decoded_palette[palette_index + 1];	7,560,720✔
212	(*result)[pixel_offset + 2] = decoded_palette[palette_index + 2];	7,560,720✔
213	}	1,890,180✔
214	*ppixelformat = SIXEL_PIXELFORMAT_RGB888;	48✔
215	} else {	12!
216	*result = decoded_pixels;	161✔
217	decoded_pixels = NULL;	161✔
218	*ppalette = decoded_palette;	161✔
219	decoded_palette = NULL;	161✔
220	*ppixelformat = SIXEL_PIXELFORMAT_PAL8;	161✔
221	}
222	status = SIXEL_OK;	53✔
223
224	end:	156✔
225	if (decoded_pixels != NULL) {	209✔
226	sixel_allocator_free(allocator, decoded_pixels);	48✔
227	decoded_pixels = NULL;	48✔
228	}	12✔
229	if (decoded_palette != NULL) {	209✔
230	sixel_allocator_free(allocator, decoded_palette);	48✔
231	decoded_palette = NULL;	48✔
232	}	12✔
233
234	return status;	53✔
235	}	53✔
236
237	static int
238	chunk_is_sixel(sixel_chunk_t const *chunk)	684✔
239	{
240	unsigned char *p;	684✔
241	unsigned char *end;	684✔
242
243	p = chunk->buffer;	684✔
244	end = p + chunk->size;	684✔
245
246	if (chunk->size < 3) {	684!
247	return 0;
248	}
249
250	p++;	681✔
251	if (p >= end) {	681!
252	return 0;
253	}
254	if ((p - 1) == 0x90 \|\| ((p - 1) == 0x1b && *p == 0x50)) {	681!
255	while (p++ < end) {	761!
256	if (*p == 0x71) {	761✔
257	return 1;	53✔
258	} else if (p == 0x18 \|\| p == 0x1a) {	552!
259	return 0;
260	} else if (*p < 0x20) {	552✔
261	continue;	8✔
262	} else if (*p < 0x30) {	544!
263	return 0;
264	} else if (*p < 0x40) {	136✔
265	continue;	135✔
266	}
267	}
268	}
269	return 0;	31✔
270	}	84✔
271
272	static int
273	chunk_is_pnm(sixel_chunk_t const *chunk)	475✔
274	{
275	if (chunk->size < 2) {	475!
276	return 0;
277	}
278	if (chunk->buffer[0] == 'P' &&	483✔
279	chunk->buffer[1] >= '1' &&	45!
280	chunk->buffer[1] <= '6') {	11✔
281	return 1;	40✔
282	}
283	return 0;	21✔
284	}	31✔
285
286	typedef union _fn_pointer {
287	sixel_load_image_function fn;
288	void * p;
289	} fn_pointer;
290
291	SIXELSTATUS
292	load_with_builtin(	684✔
293	sixel_chunk_t const *pchunk,
294	int fstatic,
295	int fuse_palette,
296	int reqcolors,
297	unsigned char *bgcolor,
298	int loop_control,
299	sixel_load_image_function fn_load,
300	void *context)
301	{
302	SIXELSTATUS status;	684✔
303	unsigned char *pixels;	684✔
304	int depth;	684✔
305	sixel_frame_t *frame;	684✔
306	fn_pointer fnp;	684✔
307	stbi__context stb_context;	684✔
308	char message[80];	684✔
309	int nwrite;	684✔
310
311	status = SIXEL_BAD_INPUT;	684✔
312	pixels = NULL;	684✔
313	depth = 0;	684✔
314	frame = NULL;	684✔
315	fnp.fn = NULL;	684✔
316	stb_context = (stbi__context){ 0 };	684✔
317	nwrite = 0;	684✔
318
319	if (pchunk == NULL) {	684!
320	status = SIXEL_BAD_ARGUMENT;	×
321	goto end;	×
322	}
323
324	if (chunk_is_sixel(pchunk)) {	684✔
325	status = sixel_frame_new(&frame, pchunk->allocator);	209✔
326	if (SIXEL_FAILED(status)) {	209!
327	goto end;	×
328	}
329	if (pchunk->size > INT_MAX) {	209!
330	status = SIXEL_BAD_INTEGER_OVERFLOW;	×
331	goto end;	×
332	}
333	status = load_sixel(&pixels,	173✔
334	pchunk->buffer,	209✔
335	(int)pchunk->size,	53✔
336	&frame->width,	53✔
337	&frame->height,	53✔
338	fuse_palette ? &frame->palette: NULL,	53✔
339	&frame->ncolors,	53✔
340	reqcolors,	53✔
341	&frame->pixelformat,	209✔
342	pchunk->allocator);	209✔
343	if (SIXEL_FAILED(status)) {	209!
344	goto end;	×
345	}
346	sixel_frame_set_pixels(frame, pixels);	209✔
347	} else if (chunk_is_pnm(pchunk)) {	528✔
348	status = sixel_frame_new(&frame, pchunk->allocator);	40✔
349	if (SIXEL_FAILED(status)) {	40!
350	goto end;	×
351	}
352	if (pchunk->size > INT_MAX) {	40!
353	status = SIXEL_BAD_INTEGER_OVERFLOW;	×
354	goto end;	×
355	}
356	status = load_pnm(pchunk->buffer,	50✔
357	(int)pchunk->size,	10✔
358	frame->allocator,	10✔
359	&pixels,
360	&frame->width,	10✔
361	&frame->height,	10✔
362	fuse_palette ? &frame->palette: NULL,	10!
363	&frame->ncolors,	10✔
364	&frame->pixelformat);	40!
365	if (SIXEL_FAILED(status)) {	40!
366	goto end;	×
367	}
368	sixel_frame_set_pixels(frame, pixels);	40✔
369	} else if (chunk_is_gif(pchunk)) {	445✔
370	fnp.fn = fn_load;	32✔
371	if (pchunk->size > INT_MAX) {	32!
372	status = SIXEL_BAD_INTEGER_OVERFLOW;	×
373	goto end;	×
374	}
375	status = load_gif(pchunk->buffer,	64✔
376	(int)pchunk->size,	8✔
377	bgcolor,	8✔
378	reqcolors,	8✔
379	fuse_palette,	8✔
380	fstatic,	8✔
381	loop_control,	8✔
382	fnp.p,	8✔
383	context,	8✔
384	pchunk->allocator);	32✔
385	if (SIXEL_FAILED(status)) {	32✔
386	goto end;	2✔
387	}
388	goto end;	30✔
389	} else {
390	status = sixel_frame_new(&frame, pchunk->allocator);	403✔
391	if (SIXEL_FAILED(status)) {	403!
392	goto end;	×
393	}
394	if (pchunk->size > INT_MAX) {	403!
395	status = SIXEL_BAD_INTEGER_OVERFLOW;	×
396	goto end;	×
397	}
398	stbi_allocator = pchunk->allocator;	403✔
399	stbi__start_mem(&stb_context,	403✔
400	pchunk->buffer,	403✔
401	(int)pchunk->size);	13✔
402	pixels = stbi__load_and_postprocess_8bit(&stb_context,	793✔
403	&frame->width,	13✔
404	&frame->height,	403✔
405	&depth,
406	3);
407	if (pixels == NULL) {	403✔
408	sixel_helper_set_additional_message(stbi_failure_reason());	22✔
409	status = SIXEL_STBI_ERROR;	22✔
410	goto end;	22✔
411	}
412	sixel_frame_set_pixels(frame, pixels);	381✔
413	frame->loop_count = 1;	381✔
414	switch (depth) {	381!
415	case 1:	373✔
416	case 3:
417	case 4:
418	frame->pixelformat = SIXEL_PIXELFORMAT_RGB888;	381✔
419	break;	381✔
420	default:
421	nwrite = snprintf(message,	×
422	sizeof(message),
423	"load_with_builtin() failed.\n"
424	"reason: unknown pixel-format.(depth: %d)\n",
425	depth);
426	if (nwrite > 0) {	×
427	sixel_helper_set_additional_message(message);	×
428	}
429	status = SIXEL_STBI_ERROR;	×
430	goto end;	×
431	}
432	}
433
434	status = sixel_frame_strip_alpha(frame, bgcolor);	630✔
435	if (SIXEL_FAILED(status)) {	630!
436	goto end;	×
437	}
438
439	status = fn_load(frame, context);	630✔
440	if (SIXEL_FAILED(status)) {	630!
441	goto end;	×
442	}
443
444	status = SIXEL_OK;	71✔
445
446	end:	600✔
447	sixel_frame_unref(frame);	684✔
448
449	return status;	768✔
450	}	84✔
451
452	/* emacs Local Variables: */
453	/* emacs mode: c */
454	/* emacs tab-width: 4 */
455	/* emacs indent-tabs-mode: nil */
456	/* emacs c-basic-offset: 4 */
457	/* emacs End: */
458	/* vim: set expandtab ts=4 sts=4 sw=4 : */
459	/* EOF */

saitoha / libsixel / 20114228509

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