1 /* 2 +----------------------------------------------------------------------+ 3 | PHP Version 5 | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1997-2013 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 31 /* System Rand functions */ 32 #ifndef RAND_MAX 33 #define RAND_MAX (1<<15) 34 #endif 35 36 /* In ZTS mode we rely on rand_r() so we must use RAND_MAX. */ 37 #if !defined(ZTS) && (defined(HAVE_LRAND48) || defined(HAVE_RANDOM)) 38 #define PHP_RAND_MAX 2147483647 39 #else 40 #define PHP_RAND_MAX RAND_MAX 41 #endif 42 43 #define RAND_RANGE(__n, __min, __max, __tmax) \ 44 (__n) = (__min) + (long) ((double) ( (double) (__max) - (__min) + 1.0) * ((__n) / ((__tmax) + 1.0))) 45 46 /* MT Rand */ 47 #define PHP_MT_RAND_MAX ((long) (0x7FFFFFFF)) /* (1<<31) - 1 */ 48 49 #ifdef PHP_WIN32 50 #define GENERATE_SEED() (((long) (time(0) * GetCurrentProcessId())) ^ ((long) (1000000.0 * php_combined_lcg(TSRMLS_C)))) 51 #else 52 #define GENERATE_SEED() (((long) (time(0) * getpid())) ^ ((long) (1000000.0 * php_combined_lcg(TSRMLS_C)))) 53 #endif 54 55 PHPAPI void php_srand(long seed TSRMLS_DC); 56 PHPAPI long php_rand(TSRMLS_D); 57 PHPAPI void php_mt_srand(php_uint32 seed TSRMLS_DC); 58 PHPAPI php_uint32 php_mt_rand(TSRMLS_D); 59 60 #endif /* PHP_RAND_H */ 61
