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avutil/mem: add av_memdup()

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-28 00:49:14 +02:00
parent 663794f63d
commit 89b5039ff2
2 changed files with 19 additions and 0 deletions
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11
libavutil/mem.c
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@ -229,6 +229,17 @@ char *av_strdup(const char *s)
return ptr;
}
void *av_memdup(const void *p, size_t size)
{
void *ptr = NULL;
if (p) {
ptr = av_malloc(size);
if (ptr)
memcpy(ptr, p, size);
}
return ptr;
}
void av_dynarray_add(void *tab_ptr, int *nb_ptr, void *elem)
{
/* see similar ffmpeg.c:grow_array() */

8
libavutil/mem.h
View File

@ -179,6 +179,14 @@ av_alloc_size(1, 2) static inline void *av_mallocz_array(size_t nmemb, size_t si
*/
char *av_strdup(const char *s) av_malloc_attrib;
/**
* Duplicate the buffer p.
* @param p buffer to be duplicated
* @return Pointer to a newly allocated buffer containing a
* copy of p or NULL if the buffer cannot be allocated.
*/
void *av_memdup(const void *p, size_t size);
/**
* Free a memory block which has been allocated with av_malloc(z)() or
* av_realloc() and set the pointer pointing to it to NULL.