diff options
Diffstat (limited to 'ext/standard/lcg.c')
| -rw-r--r-- | ext/standard/lcg.c | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/ext/standard/lcg.c b/ext/standard/lcg.c deleted file mode 100644 index 4e0d1b4ccc..0000000000 --- a/ext/standard/lcg.c +++ /dev/null @@ -1,102 +0,0 @@ -/* - +----------------------------------------------------------------------+ - | PHP version 4.0 | - +----------------------------------------------------------------------+ - | Copyright (c) 1997, 1998, 1999 The PHP Group | - +----------------------------------------------------------------------+ - | This source file is subject to version 2.0 of the PHP license, | - | that is bundled with this package in the file LICENSE, and is | - | available at through the world-wide-web at | - | http://www.php.net/license/2_0.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: Sascha Schumann <ss@2ns.de> | - +----------------------------------------------------------------------+ - */ - -#include "php.h" -#include "php_lcg.h" - -#if HAVE_UNISTD_H -#include <unistd.h> -#endif - -#ifdef ZTS -int lcg_globals_id; -#else -static php_lcg_globals lcg_globals; -#endif - -#if WIN32||WINNT -#include <process.h> -#endif - -/* - * combinedLCG() returns a pseudo random number in the range of (0,1). - * The function combines two CGs with periods of - * 2^31 - 85 and 2^31 - 249. The period of this function - * is equal to the product of both primes. - */ - -#define MODMULT(a,b,c,m,s) q = s/a;s=b*(s-a*q)-c*q;if(s<0)s+=m - -double php_combined_lcg(void) -{ - long q; - long z; - LCGLS_FETCH(); - - MODMULT(53668,40014,12211,2147483563L, LCG(s1)); - MODMULT(52774,40692,3791, 2147483399L, LCG(s2)); - - z = LCG(s1) - LCG(s2); - if(z < 1) { - z += 2147483562; - } - - return z * 4.656613e-10; -} - -static void lcg_init_globals(LCGLS_D) -{ - LCG(s1) = 1; -#ifdef ZTS - LCG(s2) = (long) tsrm_thread_id(); -#else - LCG(s2) = (long) getpid(); -#endif -} - -static int php_minit_lcg(INIT_FUNC_ARGS) -{ -#ifdef ZTS - lcg_globals_id = ts_allocate_id(sizeof(php_lcg_globals), (ts_allocate_ctor) lcg_init_globals, NULL); -#else - lcg_init_globals(); -#endif - return SUCCESS; -} - -/* {{{ proto double lcg_value() - returns a value from the combined linear congruential generator */ -PHP_FUNCTION(lcg_value) -{ - RETURN_DOUBLE(php_combined_lcg()); -} -/* }}} */ - -static function_entry lcg_functions[] = { - PHP_FE(lcg_value, NULL) - {0} -}; - -zend_module_entry lcg_module_entry = { - "LCG", - lcg_functions, - php_minit_lcg, NULL, - NULL, NULL, - NULL, - STANDARD_MODULE_PROPERTIES -}; |