100 lines
1.8 KiB
C
Executable File
100 lines
1.8 KiB
C
Executable File
#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);
|
|
}
|