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BLI_array: add BLI_array_trim utility to re-allocate the current size 

Use this in BKE_view_layer_array_* functions.
This commit is contained in:
Campbell Barton 2022-02-20 21:29:00 +11:00
parent 7b11c71729
commit 1884f6e729
2 changed files with 20 additions and 5 deletions
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14
source/blender/blenkernel/intern/layer_utils.c
View File

@ -67,9 +67,11 @@ Object **BKE_view_layer_array_selected_objects_params(
}
FOREACH_SELECTED_OBJECT_END;
object_array = MEM_reallocN(object_array, sizeof(*object_array) * BLI_array_len(object_array));
/* We always need a valid allocation (prevent crash on free). */
if (object_array == NULL) {
if (object_array != NULL) {
BLI_array_trim(object_array);
}
else {
/* We always need a valid allocation (prevent crash on free). */
object_array = MEM_mallocN(0, __func__);
}
*r_len = BLI_array_len(object_array);
@ -121,9 +123,11 @@ Base **BKE_view_layer_array_from_bases_in_mode_params(ViewLayer *view_layer,
}
FOREACH_BASE_IN_MODE_END;
base_array = MEM_reallocN(base_array, sizeof(*base_array) * BLI_array_len(base_array));
/* We always need a valid allocation (prevent crash on free). */
if (base_array == NULL) {
if (base_array != NULL) {
BLI_array_trim(base_array);
}
else {
base_array = MEM_mallocN(0, __func__);
}
*r_len = BLI_array_len(base_array);

11
source/blender/blenlib/BLI_array.h
View File

@ -146,6 +146,17 @@ void _bli_array_grow_func(void **arr_p,
*/
#define BLI_array_fake_user(arr) ((void)_##arr##_len, (void)_##arr##_static)
/**
* Trim excess items from the array (when they exist).
*/
#define BLI_array_trim(arr) \
{ \
if (_bli_array_totalsize_dynamic(arr) != _##arr##_len) { \
arr = MEM_reallocN(arr, sizeof(*arr) * _##arr##_len); \
} \
} \
((void)0)
/** \} */
/* -------------------------------------------------------------------- */