56 lines
2.1 KiB
C++
56 lines
2.1 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BLI_STACKDEFINES_H__
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#define __BLI_STACKDEFINES_H__
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/** \file BLI_stackdefines.h
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* \ingroup bli
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*/
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/* simple stack */
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#define STACK_DECLARE(stack) unsigned int _##stack##_index
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#define STACK_INIT(stack) ((void)stack, (void)((_##stack##_index) = 0))
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#define STACK_SIZE(stack) ((void)stack, (_##stack##_index))
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#define STACK_PUSH(stack, val) (void)((stack)[(_##stack##_index)++] = val)
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#define STACK_PUSH_RET(stack) ((void)stack, ((stack)[(_##stack##_index)++]))
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#define STACK_PUSH_RET_PTR(stack) ((void)stack, &((stack)[(_##stack##_index)++]))
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#define STACK_POP(stack) ((_##stack##_index) ? ((stack)[--(_##stack##_index)]) : NULL)
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#define STACK_POP_PTR(stack) ((_##stack##_index) ? &((stack)[--(_##stack##_index)]) : NULL)
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#define STACK_POP_DEFAULT(stack, r) ((_##stack##_index) ? ((stack)[--(_##stack##_index)]) : r)
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/* take care, re-orders */
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#define STACK_REMOVE(stack, i) \
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if (--_##stack##_index != i) { \
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stack[i] = stack[_##stack##_index]; \
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} (void)0
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#ifdef __GNUC__
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#define STACK_SWAP(stack_a, stack_b) { \
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SWAP(typeof(stack_a), stack_a, stack_b); \
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SWAP(unsigned int, _##stack_a##_index, _##stack_b##_index); \
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} (void)0
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#else
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#define STACK_SWAP(stack_a, stack_b) { \
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SWAP(void *, stack_a, stack_b); \
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SWAP(unsigned int, _##stack_a##_index, _##stack_b##_index); \
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} (void)0
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#endif
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#endif /* __BLI_STACKDEFINES_H__ */
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