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lavu/mem: add av_dynarray_add_nofree function

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av_dynarray_add_nofree function have similar functionality
as existing av_dynarray_add, but it doesn't deallocate memory
on fails.

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
This commit is contained in:
Lukasz Marek 2014-02-25 01:06:06 +01:00
parent 27256e69ab
commit cd50a44beb
4 changed files with 34 additions and 3 deletions
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3
doc/APIchanges
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@ -15,6 +15,9 @@ libavutil: 2012-10-22
API changes, most recent first:
2014-03-xx - xxxxxxx - lavu 52.70.100 - mem.h
Add av_dynarray_add_nofree() function.
2014-02-xx - xxxxxxx - lavu 53.08.0 - frame.h
Add av_frame_remove_side_data() for removing a single side data
instance from a frame.

13
libavutil/mem.c
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@ -278,6 +278,19 @@ void *av_memdup(const void *p, size_t size)
return ptr;
}
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
{
void **tab = *(void ***)tab_ptr;
AV_DYNARRAY_ADD(INT_MAX, sizeof(*tab), tab, *nb_ptr, {
tab[*nb_ptr] = elem;
*(void ***)tab_ptr = tab;
}, {
return AVERROR(ENOMEM);
});
return 0;
}
void av_dynarray_add(void *tab_ptr, int *nb_ptr, void *elem)
{
void **tab = *(void ***)tab_ptr;

19
libavutil/mem.h
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@ -276,10 +276,25 @@ void av_freep(void *ptr);
* @param tab_ptr pointer to the array to grow
* @param nb_ptr pointer to the number of elements in the array
* @param elem element to add
* @see av_dynarray2_add()
* @see av_dynarray_add_nofree(), av_dynarray2_add()
*/
void av_dynarray_add(void *tab_ptr, int *nb_ptr, void *elem);
/**
* Add an element to a dynamic array.
*
* Function has the same functionality as av_dynarray_add(),
* but it doesn't free memory on fails. It returns error code
* instead and leave current buffer untouched.
*
* @param tab_ptr pointer to the array to grow
* @param nb_ptr pointer to the number of elements in the array
* @param elem element to add
* @return >=0 on success, negative otherwise.
* @see av_dynarray_add(), av_dynarray2_add()
*/
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem);
/**
* Add an element of size elem_size to a dynamic array.
*
@ -299,7 +314,7 @@ void av_dynarray_add(void *tab_ptr, int *nb_ptr, void *elem);
* the new added element is not filled.
* @return pointer to the data of the element to copy in the new allocated space.
* If NULL, the new allocated space is left uninitialized."
* @see av_dynarray_add()
* @see av_dynarray_add(), av_dynarray_add_nofree()
*/
void *av_dynarray2_add(void **tab_ptr, int *nb_ptr, size_t elem_size,
const uint8_t *elem_data);

2
libavutil/version.h
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@ -56,7 +56,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 52
#define LIBAVUTIL_VERSION_MINOR 69
#define LIBAVUTIL_VERSION_MINOR 70
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \