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LinkList stack macros to swap and pop into a separate stack.

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This commit is contained in:
Campbell Barton 2014-04-13 20:12:07 +10:00
parent 2025e4cbb9
commit ad9af56a6e
1 changed files with 19 additions and 4 deletions
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23
source/blender/blenlib/BLI_linklist_stack.h
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@ -136,17 +136,25 @@
} (void)0
/* internal use, no null check */
#define _BLI_SMALLSTACK_DEL_EX(var_src, var_dst) \
(void)((_##var_src##_temp = _##var_src##_stack->next), \
(_##var_src##_stack->next = _##var_dst##_free), \
(_##var_dst##_free = _##var_src##_stack), \
(_##var_src##_stack = _##var_src##_temp)) \
#define _BLI_SMALLSTACK_DEL(var) \
(void)((_##var##_temp = _##var##_stack->next), \
(_##var##_stack->next = _##var##_free), \
(_##var##_free = _##var##_stack), \
(_##var##_stack = _##var##_temp)) \
_BLI_SMALLSTACK_DEL_EX(var, var) \
/* check for typeof() */
#define BLI_SMALLSTACK_POP(var) \
(_BLI_SMALLSTACK_CAST(var) ((_##var##_stack) ? \
(_BLI_SMALLSTACK_DEL(var), (_##var##_free->link)) : NULL))
/* support to put the free-node into another stack */
#define BLI_SMALLSTACK_POP_EX(var_src, var_dst) \
(_BLI_SMALLSTACK_CAST(var_src) ((_##var_src##_stack) ? \
(_BLI_SMALLSTACK_DEL_EX(var_src, var_dst), (_##var_dst##_free->link)) : NULL))
/* loop over stack members last-added-first */
#define BLI_SMALLSTACK_ITER_BEGIN(var, item) \
{ \
@ -158,6 +166,13 @@
} \
} (void)0
#define BLI_SMALLSTACK_SWAP(var_a, var_b) \
{ \
CHECK_TYPE_PAIR(_##var_a##_type, _##var_b##_type); \
SWAP(LinkNode *, _##var_a##_stack, _##var_b##_stack); \
SWAP(LinkNode *, _##var_a##_free, _##var_b##_free); \
} (void)0
#define BLI_SMALLSTACK_FREE(var) { \
(void)&(_##var##_type); \
} (void)0