1 /* 2 +----------------------------------------------------------------------+ 3 | PHP Version 7 | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1997-2016 The PHP Group | 6 +----------------------------------------------------------------------+ 7 | This source file is subject to version 3.01 of the PHP license, | 8 | that is bundled with this package in the file LICENSE, and is | 9 | available through the world-wide-web at the following url: | 10 | http://www.php.net/license/3_01.txt | 11 | If you did not receive a copy of the PHP license and are unable to | 12 | obtain it through the world-wide-web, please send a note to | 13 | license@php.net so we can mail you a copy immediately. | 14 +----------------------------------------------------------------------+ 15 | Authors: Rasmus Lerdorf <rasmus@php.net> | 16 | Zeev Suraski <zeev@zend.com> | 17 | Pedro Melo <melo@ip.pt> | 18 | Sterling Hughes <sterling@php.net> | 19 | | 20 | Based on code from: Shawn Cokus <Cokus@math.washington.edu> | 21 +----------------------------------------------------------------------+ 22 */ 23 /* $Id$ */ 24 25 #ifndef PHP_RAND_H 26 #define PHP_RAND_H 27 28 #include <stdlib.h> 29 #include "basic_functions.h" 30 #include "php_lcg.h" 31 32 /* System Rand functions */ 33 #ifndef RAND_MAX 34 #define RAND_MAX (1<<15) 35 #endif 36 37 /* In ZTS mode we rely on rand_r() so we must use RAND_MAX. */ 38 #if !defined(ZTS) && (defined(HAVE_LRAND48) || defined(HAVE_RANDOM)) 39 #define PHP_RAND_MAX 2147483647 40 #else 41 #define PHP_RAND_MAX RAND_MAX 42 #endif 43 44 #define RAND_RANGE(__n, __min, __max, __tmax) \ 45 (__n) = (__min) + (zend_long) ((double) ( (double) (__max) - (__min) + 1.0) * ((__n) / ((__tmax) + 1.0))) 46 47 /* MT Rand */ 48 #define PHP_MT_RAND_MAX ((zend_long) (0x7FFFFFFF)) /* (1<<31) - 1 */ 49 50 #ifdef PHP_WIN32 51 #define GENERATE_SEED() (((zend_long) (time(0) * GetCurrentProcessId())) ^ ((zend_long) (1000000.0 * php_combined_lcg()))) 52 #else 53 #define GENERATE_SEED() (((zend_long) (time(0) * getpid())) ^ ((zend_long) (1000000.0 * php_combined_lcg()))) 54 #endif 55 56 PHPAPI void php_srand(zend_long seed); 57 PHPAPI zend_long php_rand(void); 58 PHPAPI void php_mt_srand(php_uint32 seed); 59 PHPAPI php_uint32 php_mt_rand(void); 60 61 #endif /* PHP_RAND_H */