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export the mt rand functions...

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This commit is contained in:
Sterling Hughes 2001-09-09 10:44:12 +00:00
parent eede70a84f
commit 6963ac4050
2 changed files with 19 additions and 13 deletions
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8
ext/standard/php_rand.h
View File

@ -25,7 +25,9 @@
#define PHP_RAND_H
#include <stdlib.h>
#include "basic_functions.h"
/* System Rand functions */
#ifndef RAND_MAX
#define RAND_MAX (1<<15)
#endif
@ -58,4 +60,10 @@
#endif
#endif
/* MT Rand */
#define PHP_MT_RAND_MAX ((long)(0x7FFFFFFF)) /* (1<<31) - 1 */
PHPAPI void php_mt_srand(php_uint32 seed TSRMLS_DC);
PHPAPI php_uint32 php_mt_rand(TSRMLS_D);
#endif /* PHP_RAND_H */

24
ext/standard/rand.c
View File

@ -92,11 +92,9 @@
#define loBits(u) ((u) & 0x7FFFFFFFU) /* mask the highest bit of u */
#define mixBits(u, v) (hiBit(u)|loBits(v)) /* move hi bit of u to hi bit of v */
#define MT_RAND_MAX ((long)(0x7FFFFFFF)) /* (1<<31) - 1 */
/* {{{ seedMT
/* {{{ php_mt_srand
*/
static void seedMT(php_uint32 seed TSRMLS_DC)
PHPAPI void php_mt_srand(php_uint32 seed TSRMLS_DC)
{
/*
We initialize state[0..(N-1)] via the generator
@ -158,7 +156,7 @@ static php_uint32 reloadMT(TSRMLS_D)
register int j;
if (BG(left) < -1)
seedMT(4357U TSRMLS_CC);
php_mt_srand(4357U TSRMLS_CC);
BG(left) = N - 1, BG(next) = BG(state) + 1;
@ -177,7 +175,7 @@ static php_uint32 reloadMT(TSRMLS_D)
}
static php_uint32 randomMT(TSRMLS_D)
PHPAPI php_uint32 php_mt_rand(TSRMLS_D)
{
php_uint32 y;
@ -214,7 +212,7 @@ PHP_FUNCTION(mt_srand)
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &seed) == FAILURE)
return;
seedMT(seed TSRMLS_CC);
php_mt_srand(seed TSRMLS_CC);
}
/* }}} */
@ -244,8 +242,8 @@ PHP_FUNCTION(mt_srand)
*
* -RL
*/
#define RAND_RANGE(__n, __min, __max) \
(__n) = (__min) + (long) ((double) ((__max) - (__min) + 1.0) * ((__n) / (PHP_RAND_MAX + 1.0)))
#define RAND_RANGE(__n, __min, __max, __tmax) \
(__n) = (__min) + (long) ((double) ((__max) - (__min) + 1.0) * ((__n) / ((__tmax) + 1.0)))
/* {{{ proto int rand([int min, int max])
Returns a random number */
@ -261,7 +259,7 @@ PHP_FUNCTION(rand)
number = php_rand();
if (argc == 2) {
RAND_RANGE(number, min, max);
RAND_RANGE(number, min, max, PHP_RAND_MAX);
}
RETURN_LONG(number);
@ -288,9 +286,9 @@ PHP_FUNCTION(mt_rand)
* Update:
* I talked with Cokus via email and it won't ruin the algorithm
*/
number = (long) (randomMT(TSRMLS_C) >> 1);
number = (long) (php_mt_rand(TSRMLS_C) >> 1);
if (argc == 2) {
RAND_RANGE(number, min, max);
RAND_RANGE(number, min, max, PHP_MT_RAND_MAX);
}
RETURN_LONG(number);
@ -321,7 +319,7 @@ PHP_FUNCTION(mt_getrandmax)
* Melo: it could be 2^^32 but we only use 2^^31 to maintain
* compatibility with the previous php_rand
*/
RETURN_LONG(MT_RAND_MAX); /* 2^^31 */
RETURN_LONG(PHP_MT_RAND_MAX); /* 2^^31 */
}
/* }}} */