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Edit File : zend_bitset.h \| Size : 7.74 KB
/* +----------------------------------------------------------------------+ \| Zend OPcache JIT \| +----------------------------------------------------------------------+ \| Copyright (c) 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: \| \| https://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@php.net> \| +----------------------------------------------------------------------+ / #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 #define ZEND_BITSET_ALLOCA(n, use_heap) \ (zend_bitset)do_alloca((n) * ZEND_BITSET_ELM_SIZE, use_heap) /* Number of trailing zero bits (0x01 -> 0; 0x40 -> 6; 0x00 -> LEN) / static zend_always_inline int zend_ulong_ntz(zend_ulong num) { #if (defined(__GNUC__) \|\| __has_builtin(__builtin_ctzl)) \ && SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CTZL) return __builtin_ctzl(num); #elif (defined(__GNUC__) \|\| __has_builtin(__builtin_ctzll)) && defined(PHP_HAVE_BUILTIN_CTZLL) return __builtin_ctzll(num); #elif defined(_WIN32) unsigned long index; #if defined(_WIN64) if (!BitScanForward64(&index, num)) { #else if (!BitScanForward(&index, num)) { #endif / undefined behavior / return SIZEOF_ZEND_LONG 8; } return (int) index; #else int n; if (num == Z_UL(0)) return SIZEOF_ZEND_LONG * 8; n = 1; #if SIZEOF_ZEND_LONG == 8 if ((num & 0xffffffff) == 0) {n += 32; num = num >> Z_UL(32);} #endif if ((num & 0x0000ffff) == 0) {n += 16; num = num >> 16;} if ((num & 0x000000ff) == 0) {n += 8; num = num >> 8;} if ((num & 0x0000000f) == 0) {n += 4; num = num >> 4;} if ((num & 0x00000003) == 0) {n += 2; num = num >> 2;} return n - (num & 1); #endif } /* Number of leading zero bits (Undefined for zero) / static zend_always_inline int zend_ulong_nlz(zend_ulong num) { #if (defined(__GNUC__) \|\| __has_builtin(__builtin_clzl)) \ && SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CLZL) return __builtin_clzl(num); #elif (defined(__GNUC__) \|\| __has_builtin(__builtin_clzll)) && defined(PHP_HAVE_BUILTIN_CLZLL) return __builtin_clzll(num); #elif defined(_WIN32) unsigned long index; #if defined(_WIN64) if (!BitScanReverse64(&index, num)) { #else if (!BitScanReverse(&index, num)) { #endif / undefined behavior / return SIZEOF_ZEND_LONG 8; } return (int) (SIZEOF_ZEND_LONG * 8 - 1)- index; #else zend_ulong x; int n; #if SIZEOF_ZEND_LONG == 8 n = 64; x = num >> 32; if (x != 0) {n -= 32; num = x;} #else n = 32; #endif x = num >> 16; if (x != 0) {n -= 16; num = x;} x = num >> 8; if (x != 0) {n -= 8; num = x;} x = num >> 4; if (x != 0) {n -= 4; num = x;} x = num >> 2; if (x != 0) {n -= 2; num = x;} x = num >> 1; if (x != 0) return n - 2; return n - num; #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); } static inline bool zend_bitset_in(zend_bitset set, uint32_t n) { return ZEND_BIT_TEST(set, n); } 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 bool 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 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 bool zend_bitset_subset(zend_bitset set1, zend_bitset set2, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { if (set1[i] & ~set2[i]) { return 0; } } return 1; } static inline int zend_bitset_first(zend_bitset set, uint32_t len) { uint32_t i; for (i = 0; i < len; i++) { if (set[i]) { return ZEND_BITSET_ELM_SIZE * 8 * i + zend_ulong_ntz(set[i]); } } 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 / } #define ZEND_BITSET_FOREACH(set, len, bit) do { \ zend_bitset _set = (set); \ uint32_t _i, _len = (len); \ for (_i = 0; _i < _len; _i++) { \ zend_ulong _x = _set[_i]; \ if (_x) { \ (bit) = ZEND_BITSET_ELM_SIZE 8 * _i; \ for (; _x != 0; _x >>= Z_UL(1), (bit)++) { \ if (!(_x & Z_UL(1))) continue; #define ZEND_BITSET_REVERSE_FOREACH(set, len, bit) do { \ zend_bitset _set = (set); \ uint32_t _i = (len); \ zend_ulong _test = Z_UL(1) << (ZEND_BITSET_ELM_SIZE * 8 - 1); \ while (_i-- > 0) { \ zend_ulong _x = _set[_i]; \ if (_x) { \ (bit) = ZEND_BITSET_ELM_SIZE * 8 * (_i + 1) - 1; \ for (; _x != 0; _x <<= Z_UL(1), (bit)--) { \ if (!(_x & _test)) continue; \ #define ZEND_BITSET_FOREACH_END() \ } \ } \ } \ } while (0) static inline int zend_bitset_pop_first(zend_bitset set, uint32_t len) { int i = zend_bitset_first(set, len); if (i >= 0) { zend_bitset_excl(set, i); } return i; } #endif /* _ZEND_BITSET_H_ */ Back

Edit File : zend_bitset.h | Size : 7.74 KB

/*
   +----------------------------------------------------------------------+
   | Zend OPcache JIT                                                     |
   +----------------------------------------------------------------------+
   | Copyright (c) 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:           |
   | https://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@php.net>                              |
   +----------------------------------------------------------------------+
*/

#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

#define ZEND_BITSET_ALLOCA(n, use_heap) \
	(zend_bitset)do_alloca((n) * ZEND_BITSET_ELM_SIZE, use_heap)

/* Number of trailing zero bits (0x01 -> 0; 0x40 -> 6; 0x00 -> LEN) */
static zend_always_inline int zend_ulong_ntz(zend_ulong num)
{
#if (defined(__GNUC__) || __has_builtin(__builtin_ctzl)) \
	&& SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CTZL)
	return __builtin_ctzl(num);
#elif (defined(__GNUC__) || __has_builtin(__builtin_ctzll)) && defined(PHP_HAVE_BUILTIN_CTZLL)
	return __builtin_ctzll(num);
#elif defined(_WIN32)
	unsigned long index;

#if defined(_WIN64)
	if (!BitScanForward64(&index, num)) {
#else
	if (!BitScanForward(&index, num)) {
#endif
		/* undefined behavior */
		return SIZEOF_ZEND_LONG * 8;
	}

return (int) index;
#else
	int n;

if (num == Z_UL(0)) return SIZEOF_ZEND_LONG * 8;

n = 1;
#if SIZEOF_ZEND_LONG == 8
	if ((num & 0xffffffff) == 0) {n += 32; num = num >> Z_UL(32);}
#endif
	if ((num & 0x0000ffff) == 0) {n += 16; num = num >> 16;}
	if ((num & 0x000000ff) == 0) {n +=  8; num = num >>  8;}
	if ((num & 0x0000000f) == 0) {n +=  4; num = num >>  4;}
	if ((num & 0x00000003) == 0) {n +=  2; num = num >>  2;}
	return n - (num & 1);
#endif
}

/* Number of leading zero bits (Undefined for zero) */
static zend_always_inline int zend_ulong_nlz(zend_ulong num)
{
#if (defined(__GNUC__) || __has_builtin(__builtin_clzl)) \
	&& SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CLZL)
	return __builtin_clzl(num);
#elif (defined(__GNUC__) || __has_builtin(__builtin_clzll)) && defined(PHP_HAVE_BUILTIN_CLZLL)
	return __builtin_clzll(num);
#elif defined(_WIN32)
	unsigned long index;

#if defined(_WIN64)
	if (!BitScanReverse64(&index, num)) {
#else
	if (!BitScanReverse(&index, num)) {
#endif
		/* undefined behavior */
		return SIZEOF_ZEND_LONG * 8;
	}

return (int) (SIZEOF_ZEND_LONG * 8 - 1)- index;
#else
	zend_ulong x;
	int n;

#if SIZEOF_ZEND_LONG == 8
	n = 64;
	x = num >> 32; if (x != 0) {n -= 32; num = x;}
#else
	n = 32;
#endif
	x = num >> 16; if (x != 0) {n -= 16; num = x;}
	x = num >> 8;  if (x != 0) {n -=  8; num = x;}
	x = num >> 4;  if (x != 0) {n -=  4; num = x;}
	x = num >> 2;  if (x != 0) {n -=  2; num = x;}
	x = num >> 1;  if (x != 0) return n - 2;
	return n - num;
#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);
}

static inline bool zend_bitset_in(zend_bitset set, uint32_t n)
{
	return ZEND_BIT_TEST(set, n);
}

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 bool 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 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 bool zend_bitset_subset(zend_bitset set1, zend_bitset set2, uint32_t len)
{
	uint32_t i;

for (i = 0; i < len; i++) {
		if (set1[i] & ~set2[i]) {
			return 0;
		}
	}
	return 1;
}

static inline int zend_bitset_first(zend_bitset set, uint32_t len)
{
	uint32_t i;

for (i = 0; i < len; i++) {
		if (set[i]) {
			return ZEND_BITSET_ELM_SIZE * 8 * i + zend_ulong_ntz(set[i]);
		}
	}
	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 */
}

#define ZEND_BITSET_FOREACH(set, len, bit) do { \
	zend_bitset _set = (set); \
	uint32_t _i, _len = (len); \
	for (_i = 0; _i < _len; _i++) { \
		zend_ulong _x = _set[_i]; \
		if (_x) { \
			(bit) = ZEND_BITSET_ELM_SIZE * 8 * _i; \
			for (; _x != 0; _x >>= Z_UL(1), (bit)++) { \
				if (!(_x & Z_UL(1))) continue;

#define ZEND_BITSET_REVERSE_FOREACH(set, len, bit) do { \
	zend_bitset _set = (set); \
	uint32_t _i = (len); \
	zend_ulong _test = Z_UL(1) << (ZEND_BITSET_ELM_SIZE * 8 - 1); \
	while (_i-- > 0) { \
		zend_ulong _x = _set[_i]; \
		if (_x) { \
			(bit) = ZEND_BITSET_ELM_SIZE * 8 * (_i + 1) - 1; \
			for (; _x != 0; _x <<= Z_UL(1), (bit)--) { \
				if (!(_x & _test)) continue; \

#define ZEND_BITSET_FOREACH_END() \
			} \
		} \
	} \
} while (0)

static inline int zend_bitset_pop_first(zend_bitset set, uint32_t len) {
	int i = zend_bitset_first(set, len);
	if (i >= 0) {
		zend_bitset_excl(set, i);
	}
	return i;
}

#endif /* _ZEND_BITSET_H_ */

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