20466639304

Committed 23 Dec 2025 04:53PM UTC coverage: 51.46% (-6.3%) from 57.773%

Build # 20466639304

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Committed by

saitoha

Commit Message

build: fix windows find path in images meson build

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50.39

/src/allocator.c

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2021-2025 libsixel developers. See `AUTHORS`.
 * Copyright (c) 2014-2018 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.
 */

#include "config.h"

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

#if HAVE_ASSERT_H
# include <assert.h>
#endif  /* HAVE_ASSERT_H */
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif  /* HAVE_SYS_TYPES_H */
#if HAVE_ERRNO_H
# include <errno.h>
#endif  /* HAVE_ERRNO_H */
#if HAVE_MEMORY_H
# include <memory.h>
#endif  /* HAVE_MEMORY_H */

#include "allocator.h"
#include "malloc_stub.h"
#include "sixel_atomic.h"

/* create allocator object */
SIXELSTATUS
sixel_allocator_new(
    sixel_allocator_t   /* out */ **ppallocator,  /* allocator object to be created */
    sixel_malloc_t      /* in */  fn_malloc,      /* custom malloc() function */
    sixel_calloc_t      /* in */  fn_calloc,      /* custom calloc() function */
    sixel_realloc_t     /* in */  fn_realloc,     /* custom realloc() function */
    sixel_free_t        /* in */  fn_free)        /* custom free() function */
{
    SIXELSTATUS status = SIXEL_FALSE;

    if (ppallocator == NULL) {
        sixel_helper_set_additional_message(
            "sixel_allocator_new: given argument ppallocator is null.");
        status = SIXEL_BAD_ARGUMENT;
        goto end;
    }

    if (fn_malloc == NULL) {
        fn_malloc = malloc;
    }

    if (fn_calloc == NULL) {
        fn_calloc = calloc;
    }

    if (fn_realloc == NULL) {
        fn_realloc = realloc;
    }

    if (fn_free == NULL) {
        fn_free = free;
    }

    *ppallocator = fn_malloc(sizeof(sixel_allocator_t));
    if (*ppallocator == NULL) {
        sixel_helper_set_additional_message(
            "sixel_allocator_new: fn_malloc() failed.");
        status = SIXEL_BAD_ALLOCATION;
        goto end;
    }

    (*ppallocator)->ref         = 1;
    (*ppallocator)->fn_malloc   = fn_malloc;
    (*ppallocator)->fn_calloc   = fn_calloc;
    (*ppallocator)->fn_realloc  = fn_realloc;
    (*ppallocator)->fn_free     = fn_free;

    status = SIXEL_OK;

end:
    return status;
}


/* destruct allocator object */
static void
sixel_allocator_destroy(
    sixel_allocator_t /* in */ *allocator)  /* allocator object to
                                               be destroyed */
{
    /* precondition */
    assert(allocator);
    assert(allocator->fn_free);

    allocator->fn_free(allocator);
}


/* increase reference count of allocator object (thread-safe) */
SIXELAPI void
sixel_allocator_ref(
    sixel_allocator_t /* in */ *allocator)  /* allocator object to be
                                               increment reference counter */
{
    unsigned int previous;

    /* precondition */
    assert(allocator);

    /*
     * Increment the reference counter atomically so concurrent users can
     * retain the allocator without racing against a release in another
     * thread.
     */
    previous = sixel_atomic_fetch_add_u32(&allocator->ref, 1U);
    (void)previous;
}


/* decrease reference count of output context object (thread-safe) */
SIXELAPI void
sixel_allocator_unref(
    sixel_allocator_t /* in */ *allocator)  /* allocator object to be unreference */
{
    unsigned int previous;

    if (allocator) {
        /*
         * Acquire the previous value atomically. The old count informs us
         * whether this thread dropped the last reference, which drives the
         * destruction path below.
         */
        previous = sixel_atomic_fetch_sub_u32(&allocator->ref, 1U);
        assert(previous > 0U);
        if (previous == 1U) {
            sixel_allocator_destroy(allocator);
        }
    }
}


/* call custom malloc() */
SIXELAPI void *
sixel_allocator_malloc(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    size_t              /* in */ n)           /* allocation size */
{
    /* precondition */
    assert(allocator);
    assert(allocator->fn_malloc);

    if (n == 0) {
        sixel_helper_set_additional_message(
            "sixel_allocator_malloc: called with n == 0");
        return NULL;
    }

    if (n > SIXEL_ALLOCATE_BYTES_MAX) {
        return NULL;
    }

    return allocator->fn_malloc(n);
}


/* call custom calloc() */
SIXELAPI void *
sixel_allocator_calloc(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    size_t              /* in */ nelm,        /* number of elements */
    size_t              /* in */ elsize)      /* size of element */
{
    size_t n;

    /* precondition */
    assert(allocator);
    assert(allocator->fn_calloc);

    n = nelm * elsize;

    if (n == 0) {
        sixel_helper_set_additional_message(
            "sixel_allocator_malloc: called with n == 0");
        return NULL;
    }

    if (n > SIXEL_ALLOCATE_BYTES_MAX) {
        return NULL;
    }

    return allocator->fn_calloc(nelm, elsize);
}


/* call custom realloc() */
SIXELAPI void *
sixel_allocator_realloc(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    void                /* in */ *p,          /* existing buffer to be re-allocated */
    size_t              /* in */ n)           /* re-allocation size */
{
    /* precondition */
    assert(allocator);
    assert(allocator->fn_realloc);

    if (n == 0) {
        sixel_helper_set_additional_message(
            "sixel_allocator_malloc: called with n == 0");
        return NULL;
    }

    if (n > SIXEL_ALLOCATE_BYTES_MAX) {
        return NULL;
    }

    return allocator->fn_realloc(p, n);
}


/* call custom free() */
SIXELAPI void
sixel_allocator_free(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    void                /* in */ *p)          /* existing buffer to be freed */
{
    /* precondition */
    assert(allocator);

    allocator->fn_free(p);
}


#if HAVE_TESTS
volatile int sixel_debug_malloc_counter;

void *
sixel_bad_malloc(size_t size)
{
    return sixel_debug_malloc_counter-- == 0 ? NULL: malloc(size);
}


void *
sixel_bad_calloc(size_t count, size_t size)
{
    (void) count;
    (void) size;

    return NULL;
}


void *
sixel_bad_realloc(void *ptr, size_t size)
{
    (void) ptr;
    (void) size;

    return NULL;
}
#endif  /* HAVE_TESTS */

#if 0
int
rpl_posix_memalign(void **memptr, size_t alignment, size_t size)
{
#if HAVE_POSIX_MEMALIGN
    return posix_memalign(memptr, alignment, size);
#elif HAVE_ALIGNED_ALLOC
    *memptr = aligned_alloc(alignment, size);
    return *memptr ? 0: ENOMEM;
#elif HAVE_MEMALIGN
    *memptr = memalign(alignment, size);
    return *memptr ? 0: ENOMEM;
#elif HAVE__ALIGNED_MALLOC
    return _aligned_malloc(size, alignment);
#else
# error
#endif /* _MSC_VER */
}
#endif


/*
 * Confirm that allocator construction validates callback arguments and
 * reports missing functions as bad arguments.
 */
#if HAVE_TESTS
static int
allocator_test_rejects_null_callbacks(void)
{
    int nret = EXIT_FAILURE;
    SIXELSTATUS status;
    sixel_allocator_t *allocator = NULL;

    status = sixel_allocator_new(NULL, malloc, calloc, realloc, free);
    if (status != SIXEL_BAD_ARGUMENT) {
        goto error;
    }

    status = sixel_allocator_new(&allocator, NULL, calloc, realloc, free);
    if (SIXEL_FAILED(status)) {
        goto error;
    }

    status = sixel_allocator_new(&allocator, malloc, NULL, realloc, free);
    if (SIXEL_FAILED(status)) {
        goto error;
    }

    status = sixel_allocator_new(&allocator, malloc, calloc, NULL, free);
    if (SIXEL_FAILED(status)) {
        goto error;
    }

    status = sixel_allocator_new(&allocator, malloc, calloc, realloc, NULL);
    if (SIXEL_FAILED(status)) {
        goto error;
    }

    nret = EXIT_SUCCESS;

error:
    return nret;
}


/*
 * Ensure debug allocation counters surface allocation failures from custom
 * callbacks.
 */
static int
allocator_test_reports_debug_allocation(void)
{
    int nret = EXIT_FAILURE;
    SIXELSTATUS status;
    sixel_allocator_t *allocator = NULL;

    sixel_debug_malloc_counter = 1;

    status = sixel_allocator_new(
        &allocator,
        sixel_bad_malloc,
        calloc,
        realloc,
        free);
    if (status == SIXEL_BAD_ALLOCATION) {
        goto error;
    }

    nret = EXIT_SUCCESS;

error:
    return nret;
}


SIXELAPI int
sixel_allocator_tests_main(void)
{
    int nret = EXIT_FAILURE;
    size_t i;
    typedef int (* testcase)(void);

    static testcase const testcases[] = {
        allocator_test_rejects_null_callbacks,
        allocator_test_reports_debug_allocation
    };

    for (i = 0; i < sizeof(testcases) / sizeof(testcase); ++i) {
        nret = testcases[i]();
        if (nret != EXIT_SUCCESS) {
            goto error;
        }
    }

    nret = EXIT_SUCCESS;

error:
    return nret;
}
#endif  /* HAVE_TESTS */

/* 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) 2014-2018 Hayaki Saito
6	*
7	* Permission is hereby granted, free of charge, to any person obtaining a copy of
8	* this software and associated documentation files (the "Software"), to deal in
9	* the Software without restriction, including without limitation the rights to
10	* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11	* the Software, and to permit persons to whom the Software is furnished to do so,
12	* subject to the following conditions:
13	*
14	* The above copyright notice and this permission notice shall be included in all
15	* 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, FITNESS
19	* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20	* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21	* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23	*/
24
25	#include "config.h"
26
27	/* STDC_HEADERS */
28	#include <stdlib.h>
29
30	#if HAVE_ASSERT_H
31	# include <assert.h>
32	#endif /* HAVE_ASSERT_H */
33	#if HAVE_SYS_TYPES_H
34	# include <sys/types.h>
35	#endif /* HAVE_SYS_TYPES_H */
36	#if HAVE_ERRNO_H
37	# include <errno.h>
38	#endif /* HAVE_ERRNO_H */
39	#if HAVE_MEMORY_H
40	# include <memory.h>
41	#endif /* HAVE_MEMORY_H */
42
43	#include "allocator.h"
44	#include "malloc_stub.h"
45	#include "sixel_atomic.h"
46
47	/* create allocator object */
48	SIXELSTATUS
49	sixel_allocator_new(	1,109✔
50	sixel_allocator_t /* out / ppallocator, / allocator object to be created */
51	sixel_malloc_t /* in / fn_malloc, / custom malloc() function */
52	sixel_calloc_t /* in / fn_calloc, / custom calloc() function */
53	sixel_realloc_t /* in / fn_realloc, / custom realloc() function */
54	sixel_free_t /* in / fn_free) / custom free() function */
55	{
56	SIXELSTATUS status = SIXEL_FALSE;	1,109✔
57
58	if (ppallocator == NULL) {	1,109!
59	sixel_helper_set_additional_message(	×
60	"sixel_allocator_new: given argument ppallocator is null.");
61	status = SIXEL_BAD_ARGUMENT;	×
62	goto end;	×
63	}
64
65	if (fn_malloc == NULL) {	1,109✔
66	fn_malloc = malloc;	940✔
67	}
68
69	if (fn_calloc == NULL) {	1,109✔
70	fn_calloc = calloc;	940✔
71	}
72
73	if (fn_realloc == NULL) {	1,109✔
74	fn_realloc = realloc;	940✔
75	}
76
77	if (fn_free == NULL) {	1,109✔
78	fn_free = free;	940✔
79	}
80
81	*ppallocator = fn_malloc(sizeof(sixel_allocator_t));	1,109✔
82	if (*ppallocator == NULL) {	1,109!
83	sixel_helper_set_additional_message(	×
84	"sixel_allocator_new: fn_malloc() failed.");
85	status = SIXEL_BAD_ALLOCATION;	×
86	goto end;	×
87	}
88
89	(*ppallocator)->ref = 1;	1,109✔
90	(*ppallocator)->fn_malloc = fn_malloc;	1,109✔
91	(*ppallocator)->fn_calloc = fn_calloc;	1,109✔
92	(*ppallocator)->fn_realloc = fn_realloc;	1,109✔
93	(*ppallocator)->fn_free = fn_free;	1,109✔
94
95	status = SIXEL_OK;	1,109✔
96
97	end:	1,109✔
98	return status;	1,109✔
99	}
100
101
102	/* destruct allocator object */
103	static void
104	sixel_allocator_destroy(	480✔
105	sixel_allocator_t /* in / allocator) /* allocator object to
106	be destroyed */
107	{
108	/* precondition */
109	assert(allocator);	480!
110	assert(allocator->fn_free);	480!
111
112	allocator->fn_free(allocator);	480✔
113	}	480✔
114
115
116	/* increase reference count of allocator object (thread-safe) */
117	SIXELAPI void
118	sixel_allocator_ref(	6,547✔
119	sixel_allocator_t /* in / allocator) /* allocator object to be
120	increment reference counter */
121	{
122	unsigned int previous;	6,547✔
123
124	/* precondition */
125	assert(allocator);	6,547!
126
127	/*
128	* Increment the reference counter atomically so concurrent users can
129	* retain the allocator without racing against a release in another
130	* thread.
131	*/
132	previous = sixel_atomic_fetch_add_u32(&allocator->ref, 1U);	6,547✔
133	(void)previous;	6,547✔
134	}	6,547✔
135
136
137	/* decrease reference count of output context object (thread-safe) */
138	SIXELAPI void
139	sixel_allocator_unref(	7,023✔
140	sixel_allocator_t /* in / allocator) /* allocator object to be unreference */
141	{
142	unsigned int previous;	7,023✔
143
144	if (allocator) {	7,023!
145	/*
146	* Acquire the previous value atomically. The old count informs us
147	* whether this thread dropped the last reference, which drives the
148	* destruction path below.
149	*/
150	previous = sixel_atomic_fetch_sub_u32(&allocator->ref, 1U);	7,023!
151	assert(previous > 0U);	7,023!
152	if (previous == 1U) {	7,023✔
153	sixel_allocator_destroy(allocator);	480✔
154	}
155	}
156	}	7,023✔
157
158
159	/* call custom malloc() */
160	SIXELAPI void *
161	sixel_allocator_malloc(	2,568,553✔
162	sixel_allocator_t /* in / allocator, /* allocator object */
163	size_t /* in / n) / allocation size */
164	{
165	/* precondition */
166	assert(allocator);	2,568,553!
167	assert(allocator->fn_malloc);	2,568,553!
168
169	if (n == 0) {	2,568,553!
170	sixel_helper_set_additional_message(	×
171	"sixel_allocator_malloc: called with n == 0");
172	return NULL;	×
173	}
174
175	if (n > SIXEL_ALLOCATE_BYTES_MAX) {	2,568,553!
176	return NULL;
177	}
178
179	return allocator->fn_malloc(n);	2,568,553✔
180	}
181
182
183	/* call custom calloc() */
184	SIXELAPI void *
185	sixel_allocator_calloc(	2,888✔
186	sixel_allocator_t /* in / allocator, /* allocator object */
187	size_t /* in / nelm, / number of elements */
188	size_t /* in / elsize) / size of element */
189	{
190	size_t n;	2,888✔
191
192	/* precondition */
193	assert(allocator);	2,888!
194	assert(allocator->fn_calloc);	2,888!
195
196	n = nelm * elsize;	2,888✔
197
198	if (n == 0) {	2,888!
199	sixel_helper_set_additional_message(	×
200	"sixel_allocator_malloc: called with n == 0");
201	return NULL;	×
202	}
203
204	if (n > SIXEL_ALLOCATE_BYTES_MAX) {	2,888!
205	return NULL;
206	}
207
208	return allocator->fn_calloc(nelm, elsize);	2,888✔
209	}
210
211
212	/* call custom realloc() */
213	SIXELAPI void *
214	sixel_allocator_realloc(	2,074✔
215	sixel_allocator_t /* in / allocator, /* allocator object */
216	void /* in / p, /* existing buffer to be re-allocated */
217	size_t /* in / n) / re-allocation size */
218	{
219	/* precondition */
220	assert(allocator);	2,074!
221	assert(allocator->fn_realloc);	2,074!
222
223	if (n == 0) {	2,074!
224	sixel_helper_set_additional_message(	×
225	"sixel_allocator_malloc: called with n == 0");
226	return NULL;	×
227	}
228
229	if (n > SIXEL_ALLOCATE_BYTES_MAX) {	2,074!
230	return NULL;
231	}
232
233	return allocator->fn_realloc(p, n);	2,074✔
234	}
235
236
237	/* call custom free() */
238	SIXELAPI void
239	sixel_allocator_free(	2,579,044✔
240	sixel_allocator_t /* in / allocator, /* allocator object */
241	void /* in / p) /* existing buffer to be freed */
242	{
243	/* precondition */
244	assert(allocator);	2,579,044!
245
246	allocator->fn_free(p);	2,579,044✔
247	}	2,579,044✔
248
249
250	#if HAVE_TESTS
251	volatile int sixel_debug_malloc_counter;
252
253	void *
254	sixel_bad_malloc(size_t size)	×
255	{
256	return sixel_debug_malloc_counter-- == 0 ? NULL: malloc(size);	×
257	}
258
259
260	void *
261	sixel_bad_calloc(size_t count, size_t size)	×
262	{
263	(void) count;	×
264	(void) size;	×
265
266	return NULL;	×
267	}
268
269
270	void *
271	sixel_bad_realloc(void *ptr, size_t size)	×
272	{
273	(void) ptr;	×
274	(void) size;	×
275
276	return NULL;	×
277	}
278	#endif /* HAVE_TESTS */
279
280	#if 0
281	int
282	rpl_posix_memalign(void **memptr, size_t alignment, size_t size)
283	{
284	#if HAVE_POSIX_MEMALIGN
285	return posix_memalign(memptr, alignment, size);
286	#elif HAVE_ALIGNED_ALLOC
287	*memptr = aligned_alloc(alignment, size);
288	return *memptr ? 0: ENOMEM;
289	#elif HAVE_MEMALIGN
290	*memptr = memalign(alignment, size);
291	return *memptr ? 0: ENOMEM;
292	#elif HAVE__ALIGNED_MALLOC
293	return _aligned_malloc(size, alignment);
294	#else
295	# error
296	#endif /* _MSC_VER */
297	}
298	#endif
299
300
301	/*
302	* Confirm that allocator construction validates callback arguments and
303	* reports missing functions as bad arguments.
304	*/
305	#if HAVE_TESTS
306	static int
307	allocator_test_rejects_null_callbacks(void)	×
308	{
309	int nret = EXIT_FAILURE;	×
310	SIXELSTATUS status;	×
311	sixel_allocator_t *allocator = NULL;	×
312
313	status = sixel_allocator_new(NULL, malloc, calloc, realloc, free);	×
314	if (status != SIXEL_BAD_ARGUMENT) {	×
315	goto error;
316	}
317
318	status = sixel_allocator_new(&allocator, NULL, calloc, realloc, free);	×
319	if (SIXEL_FAILED(status)) {	×
320	goto error;	×
321	}
322
323	status = sixel_allocator_new(&allocator, malloc, NULL, realloc, free);	×
324	if (SIXEL_FAILED(status)) {	×
325	goto error;	×
326	}
327
328	status = sixel_allocator_new(&allocator, malloc, calloc, NULL, free);	×
329	if (SIXEL_FAILED(status)) {	×
330	goto error;	×
331	}
332
333	status = sixel_allocator_new(&allocator, malloc, calloc, realloc, NULL);	×
334	if (SIXEL_FAILED(status)) {	×
335	goto error;	×
336	}
337
338	nret = EXIT_SUCCESS;
339
340	error:	×
341	return nret;	×
342	}
343
344
345	/*
346	* Ensure debug allocation counters surface allocation failures from custom
347	* callbacks.
348	*/
349	static int
350	allocator_test_reports_debug_allocation(void)	×
351	{
352	int nret = EXIT_FAILURE;	×
353	SIXELSTATUS status;	×
354	sixel_allocator_t *allocator = NULL;	×
355
356	sixel_debug_malloc_counter = 1;	×
357
358	status = sixel_allocator_new(	×
359	&allocator,
360	sixel_bad_malloc,
361	calloc,
362	realloc,
363	free);
364	if (status == SIXEL_BAD_ALLOCATION) {	×
365	goto error;	×
366	}
367
368	nret = EXIT_SUCCESS;
369
370	error:	×
371	return nret;	×
372	}
373
374
375	SIXELAPI int
376	sixel_allocator_tests_main(void)	×
377	{
378	int nret = EXIT_FAILURE;	×
379	size_t i;	×
380	typedef int (* testcase)(void);	×
381
382	static testcase const testcases[] = {	×
383	allocator_test_rejects_null_callbacks,
384	allocator_test_reports_debug_allocation
385	};
386
387	for (i = 0; i < sizeof(testcases) / sizeof(testcase); ++i) {	×
388	nret = testcases[i]();	×
389	if (nret != EXIT_SUCCESS) {	×
390	goto error;	×
391	}
392	}
393
394	nret = EXIT_SUCCESS;
395
396	error:	×
397	return nret;	×
398	}
399	#endif /* HAVE_TESTS */
400
401	/* emacs Local Variables: */
402	/* emacs mode: c */
403	/* emacs tab-width: 4 */
404	/* emacs indent-tabs-mode: nil */
405	/* emacs c-basic-offset: 4 */
406	/* emacs End: */
407	/* vim: set expandtab ts=4 sts=4 sw=4 : */
408	/* EOF */

saitoha / libsixel / 20466639304

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