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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2012 by Nicholas Bishop
* All rights reserved.
*/
#pragma once
/** \file
* \ingroup bli
*/
#include "BLI_utildefines.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef unsigned int BLI_bitmap;
/* warning: the bitmap does not keep track of its own size or check
* for out-of-bounds access */
/* internal use */
/* 2^5 = 32 (bits) */
#define _BITMAP_POWER 5
/* 0b11111 */
#define _BITMAP_MASK 31
/* number of blocks needed to hold '_tot' bits */
#define _BITMAP_NUM_BLOCKS(_tot) (((_tot) >> _BITMAP_POWER) + 1)
/* size (in bytes) used to hold '_tot' bits */
#define BLI_BITMAP_SIZE(_tot) ((size_t)(_BITMAP_NUM_BLOCKS(_tot)) * sizeof(BLI_bitmap))
/* allocate memory for a bitmap with '_tot' bits; free with MEM_freeN() */
#define BLI_BITMAP_NEW(_tot, _alloc_string) \
((BLI_bitmap *)MEM_callocN(BLI_BITMAP_SIZE(_tot), _alloc_string))
/* allocate a bitmap on the stack */
#define BLI_BITMAP_NEW_ALLOCA(_tot) \
((BLI_bitmap *)memset(alloca(BLI_BITMAP_SIZE(_tot)), 0, BLI_BITMAP_SIZE(_tot)))
/* Allocate using given MemArena */
#define BLI_BITMAP_NEW_MEMARENA(_mem, _tot) \
(CHECK_TYPE_INLINE(_mem, MemArena *), \
((BLI_bitmap *)BLI_memarena_calloc(_mem, BLI_BITMAP_SIZE(_tot))))
/* get the value of a single bit at '_index' */
#define BLI_BITMAP_TEST(_bitmap, _index) \
(CHECK_TYPE_ANY(_bitmap, BLI_bitmap *, const BLI_bitmap *), \
((_bitmap)[(_index) >> _BITMAP_POWER] & (1u << ((_index)&_BITMAP_MASK))))
#define BLI_BITMAP_TEST_AND_SET_ATOMIC(_bitmap, _index) \
(CHECK_TYPE_ANY(_bitmap, BLI_bitmap *, const BLI_bitmap *), \
(atomic_fetch_and_or_uint32((uint32_t *)&(_bitmap)[(_index) >> _BITMAP_POWER], \
(1u << ((_index)&_BITMAP_MASK))) & \
(1u << ((_index)&_BITMAP_MASK))))
#define BLI_BITMAP_TEST_BOOL(_bitmap, _index) \
(CHECK_TYPE_ANY(_bitmap, BLI_bitmap *, const BLI_bitmap *), \
(BLI_BITMAP_TEST(_bitmap, _index) != 0))
/* set the value of a single bit at '_index' */
#define BLI_BITMAP_ENABLE(_bitmap, _index) \
(CHECK_TYPE_ANY(_bitmap, BLI_bitmap *, const BLI_bitmap *), \
((_bitmap)[(_index) >> _BITMAP_POWER] |= (1u << ((_index)&_BITMAP_MASK))))
/* clear the value of a single bit at '_index' */
#define BLI_BITMAP_DISABLE(_bitmap, _index) \
(CHECK_TYPE_ANY(_bitmap, BLI_bitmap *, const BLI_bitmap *), \
((_bitmap)[(_index) >> _BITMAP_POWER] &= ~(1u << ((_index)&_BITMAP_MASK))))
/* flip the value of a single bit at '_index' */
#define BLI_BITMAP_FLIP(_bitmap, _index) \
(CHECK_TYPE_ANY(_bitmap, BLI_bitmap *, const BLI_bitmap *), \
((_bitmap)[(_index) >> _BITMAP_POWER] ^= (1u << ((_index)&_BITMAP_MASK))))
/* set or clear the value of a single bit at '_index' */
#define BLI_BITMAP_SET(_bitmap, _index, _set) \
{ \
CHECK_TYPE(_bitmap, BLI_bitmap *); \
if (_set) { \
BLI_BITMAP_ENABLE(_bitmap, _index); \
} \
else { \
BLI_BITMAP_DISABLE(_bitmap, _index); \
} \
} \
(void)0
/* resize bitmap to have space for '_tot' bits */
#define BLI_BITMAP_RESIZE(_bitmap, _tot) \
{ \
CHECK_TYPE(_bitmap, BLI_bitmap *); \
(_bitmap) = MEM_recallocN(_bitmap, BLI_BITMAP_SIZE(_tot)); \
} \
(void)0
void BLI_bitmap_set_all(BLI_bitmap *bitmap, bool set, size_t bits);
void BLI_bitmap_flip_all(BLI_bitmap *bitmap, size_t bits);
void BLI_bitmap_copy_all(BLI_bitmap *dst, const BLI_bitmap *src, size_t bits);
void BLI_bitmap_and_all(BLI_bitmap *dst, const BLI_bitmap *src, size_t bits);
void BLI_bitmap_or_all(BLI_bitmap *dst, const BLI_bitmap *src, size_t bits);
#ifdef __cplusplus
}
#endif
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