/src/libexif/libexif/exif-mem.c

Source
/* exif-mem.c
 *
 * Copyright (c) 2004 Lutz Mueller <lutz@users.sourceforge.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301  USA.
 *
 * SPDX-License-Identifier: LGPL-2.0-or-later
 */

#include <libexif/exif-mem.h>

#include <stdlib.h>

struct _ExifMem {
  unsigned int ref_count;
  ExifMemAllocFunc alloc_func;
  ExifMemReallocFunc realloc_func;
  ExifMemFreeFunc free_func;
};

/*! Default memory allocation function. */
static void *
exif_mem_alloc_func (ExifLong ds)
{
  return calloc ((size_t) ds, 1);
}

/*! Default memory reallocation function. */
static void *
exif_mem_realloc_func (void *d, ExifLong ds)
{
  return realloc (d, (size_t) ds);
}

/*! Default memory free function. */
static void
exif_mem_free_func (void *d)
{
  free (d);
}

ExifMem *
exif_mem_new (ExifMemAllocFunc alloc_func, ExifMemReallocFunc realloc_func,
        ExifMemFreeFunc free_func)
{
  ExifMem *mem;

  if (!alloc_func && !realloc_func) 
    return NULL;
  mem = alloc_func ? alloc_func (sizeof (ExifMem)) :
               realloc_func (NULL, sizeof (ExifMem));
  if (!mem) return NULL;
  mem->ref_count = 1;

  mem->alloc_func   = alloc_func;
  mem->realloc_func = realloc_func;
  mem->free_func    = free_func;

  return mem;
}

void
exif_mem_ref (ExifMem *mem)
{
  if (!mem) return;
  mem->ref_count++;
}

void
exif_mem_unref (ExifMem *mem)
{
  if (!mem) return;
  if (!--mem->ref_count)
    exif_mem_free (mem, mem);
}

void
exif_mem_free (ExifMem *mem, void *d)
{
  if (!mem) return;
  if (mem->free_func) {
    mem->free_func (d);
    return;
  }
}

void *
exif_mem_alloc (ExifMem *mem, ExifLong ds)
{
  if (!mem) return NULL;
  if (mem->alloc_func || mem->realloc_func)
    return mem->alloc_func ? mem->alloc_func (ds) :
           mem->realloc_func (NULL, ds);
  return NULL;
}

void *
exif_mem_realloc (ExifMem *mem, void *d, ExifLong ds)
{
  return (mem && mem->realloc_func) ? mem->realloc_func (d, ds) : NULL;
}

ExifMem *
exif_mem_new_default (void)
{
  return exif_mem_new (exif_mem_alloc_func, exif_mem_realloc_func,
           exif_mem_free_func);
}

Line	Count	Source
1		/* exif-mem.c
2		*
3		* Copyright (c) 2004 Lutz Mueller <lutz@users.sourceforge.net>
4		*
5		* This library is free software; you can redistribute it and/or
6		* modify it under the terms of the GNU Lesser General Public
7		* License as published by the Free Software Foundation; either
8		* version 2 of the License, or (at your option) any later version.
9		*
10		* This library is distributed in the hope that it will be useful,
11		* but WITHOUT ANY WARRANTY; without even the implied warranty of
12		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13		* Lesser General Public License for more details.
14		*
15		* You should have received a copy of the GNU Lesser General Public
16		* License along with this library; if not, write to the
17		* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18		* Boston, MA 02110-1301 USA.
19		*
20		* SPDX-License-Identifier: LGPL-2.0-or-later
21		*/
22
23		#include <libexif/exif-mem.h>
24
25		#include <stdlib.h>
26
27		struct _ExifMem {
28		unsigned int ref_count;
29		ExifMemAllocFunc alloc_func;
30		ExifMemReallocFunc realloc_func;
31		ExifMemFreeFunc free_func;
32		};
33
34		/! Default memory allocation function. /
35		static void *
36		exif_mem_alloc_func (ExifLong ds)
37	1.52M	{
38	1.52M	return calloc ((size_t) ds, 1);
39	1.52M	}
40
41		/! Default memory reallocation function. /
42		static void *
43		exif_mem_realloc_func (void *d, ExifLong ds)
44	189k	{
45	189k	return realloc (d, (size_t) ds);
46	189k	}
47
48		/! Default memory free function. /
49		static void
50		exif_mem_free_func (void *d)
51	1.57M	{
52	1.57M	free (d);
53	1.57M	}
54
55		ExifMem *
56		exif_mem_new (ExifMemAllocFunc alloc_func, ExifMemReallocFunc realloc_func,
57		ExifMemFreeFunc free_func)
58	80.2k	{
59	80.2k	ExifMem *mem;
60
61	80.2k	if (!alloc_func && !realloc_func)
62	0	return NULL;
63	80.2k	mem = alloc_func ? alloc_func (sizeof (ExifMem)) :
64	80.2k	realloc_func (NULL, sizeof (ExifMem));
65	80.2k	if (!mem) return NULL;
66	80.2k	mem->ref_count = 1;
67
68	80.2k	mem->alloc_func = alloc_func;
69	80.2k	mem->realloc_func = realloc_func;
70	80.2k	mem->free_func = free_func;
71
72	80.2k	return mem;
73	80.2k	}
74
75		void
76		exif_mem_ref (ExifMem *mem)
77	619k	{
78	619k	if (!mem) return;
79	619k	mem->ref_count++;
80	619k	}
81
82		void
83		exif_mem_unref (ExifMem *mem)
84	700k	{
85	700k	if (!mem) return;
86	700k	if (!--mem->ref_count)
87	80.2k	exif_mem_free (mem, mem);
88	700k	}
89
90		void
91		exif_mem_free (ExifMem mem, void d)
92	1.57M	{
93	1.57M	if (!mem) return;
94	1.57M	if (mem->free_func) {
95	1.57M	mem->free_func (d);
96	1.57M	return;
97	1.57M	}
98	1.57M	}
99
100		void *
101		exif_mem_alloc (ExifMem *mem, ExifLong ds)
102	1.44M	{
103	1.44M	if (!mem) return NULL;
104	1.44M	if (mem->alloc_func \|\| mem->realloc_func)
105	1.44M	return mem->alloc_func ? mem->alloc_func (ds) :
106	1.44M	mem->realloc_func (NULL, ds);
107	0	return NULL;
108	1.44M	}
109
110		void *
111		exif_mem_realloc (ExifMem mem, void d, ExifLong ds)
112	189k	{
113	189k	return (mem && mem->realloc_func) ? mem->realloc_func (d, ds) : NULL;
114	189k	}
115
116		ExifMem *
117		exif_mem_new_default (void)
118	80.2k	{
119	80.2k	return exif_mem_new (exif_mem_alloc_func, exif_mem_realloc_func,
120	80.2k	exif_mem_free_func);
121	80.2k	}

Coverage Report

Created: 2026-07-16 06:45