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/* +----------------------------------------------------------------------+ | Zend OPcache JIT | +----------------------------------------------------------------------+ | Copyright (c) 1998-2014 The PHP Group | +----------------------------------------------------------------------+ | This source file is subject to version 3.01 of the PHP license, | | that is bundled with this package in the file LICENSE, and is | | available through the world-wide-web at the following url: | | http://www.php.net/license/3_01.txt | | If you did not receive a copy of the PHP license and are unable to | | obtain it through the world-wide-web, please send a note to | | license@php.net so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Authors: Dmitry Stogov <dmitry@zend.com> | +----------------------------------------------------------------------+ */ /* $Id:$ */ #ifndef _ZEND_BITSET_H_ #define _ZEND_BITSET_H_ typedef zend_ulong *zend_bitset; #define ZEND_BITSET_ELM_SIZE sizeof(zend_ulong) #if SIZEOF_ZEND_LONG == 4 # define ZEND_BITSET_ELM_NUM(n) ((n) >> 5) # define ZEND_BITSET_BIT_NUM(n) ((zend_ulong)(n) & Z_UL(0x1f)) #elif SIZEOF_ZEND_LONG == 8 # define ZEND_BITSET_ELM_NUM(n) ((n) >> 6) # define ZEND_BITSET_BIT_NUM(n) ((zend_ulong)(n) & Z_UL(0x3f)) #else # define ZEND_BITSET_ELM_NUM(n) ((n) / (sizeof(zend_long) * 8)) # define ZEND_BITSET_BIT_NUM(n) ((n) % (sizeof(zend_long) * 8)) #endif /* Returns the number of zend_ulong words needed to store a bitset that is N bits long. */ static inline uint32_t zend_bitset_len(uint32_t n) { return (n + ((sizeof(zend_long) * 8) - 1)) / (sizeof(zend_long) * 8); } #define ZEND_BITSET_ALLOCA(n, use_heap) \ (zend_bitset)do_alloca((n) * ZEND_BITSET_ELM_SIZE, use_heap) static inline zend_bool zend_bitset_in(zend_bitset set, uint32_t n) { return (set[ZEND_BITSET_ELM_NUM(n)] & (Z_UL(1) << ZEND_BITSET_BIT_NUM(n))) != Z_UL(0); } static inline void zend_bitset_incl(zend_bitset set, uint32_t n) { set[ZEND_BITSET_ELM_NUM(n)] |= Z_UL(1) << ZEND_BITSET_BIT_NUM(n); } static inline void zend_bitset_excl(zend_bitset set, uint32_t n) { set[ZEND_BITSET_ELM_NUM(n)] &= ~(Z_UL(1) << ZEND_BITSET_BIT_NUM(n)); } static inline void zend_bitset_clear(zend_bitset set, uint32_t len) { memset(set, 0, len * ZEND_BITSET_ELM_SIZE); } static inline int zend_bitset_empty(zend_bitset set, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { if (set[i]) { return 0; } } return 1; } static inline void zend_bitset_fill(zend_bitset set, uint32_t len) { memset(set, 0xff, len * ZEND_BITSET_ELM_SIZE); } static inline zend_bool zend_bitset_equal(zend_bitset set1, zend_bitset set2, uint32_t len) { return memcmp(set1, set2, len * ZEND_BITSET_ELM_SIZE) == 0; } static inline void zend_bitset_copy(zend_bitset set1, zend_bitset set2, uint32_t len) { memcpy(set1, set2, len * ZEND_BITSET_ELM_SIZE); } static inline void zend_bitset_intersection(zend_bitset set1, zend_bitset set2, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { set1[i] &= set2[i]; } } static inline void zend_bitset_union(zend_bitset set1, zend_bitset set2, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { set1[i] |= set2[i]; } } static inline void zend_bitset_difference(zend_bitset set1, zend_bitset set2, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { set1[i] = set1[i] & ~set2[i]; } } static inline void zend_bitset_union_with_intersection(zend_bitset set1, zend_bitset set2, zend_bitset set3, zend_bitset set4, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { set1[i] = set2[i] | (set3[i] & set4[i]); } } static inline void zend_bitset_union_with_difference(zend_bitset set1, zend_bitset set2, zend_bitset set3, zend_bitset set4, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { set1[i] = set2[i] | (set3[i] & ~set4[i]); } } static inline int zend_bitset_first(zend_bitset set, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { if (set[i]) { int j = ZEND_BITSET_ELM_SIZE * 8 * i; zend_ulong x = set[i]; while ((x & Z_UL(1)) == 0) { x = x >> Z_UL(1); j++; } return j; } } return -1; /* empty set */ } static inline int zend_bitset_last(zend_bitset set, uint32_t len) { uint32_t i = len; while (i > 0) { i--; if (set[i]) { int j = ZEND_BITSET_ELM_SIZE * 8 * i - 1; zend_ulong x = set[i]; while (x != Z_UL(0)) { x = x >> Z_UL(1); j++; } return j; } } return -1; /* empty set */ } #endif /* _ZEND_BITSET_H_ */ /* * Local variables: * tab-width: 4 * c-basic-offset: 4 * indent-tabs-mode: t * End: */
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