1/*
2   +----------------------------------------------------------------------+
3   | PHP Version 5                                                        |
4   +----------------------------------------------------------------------+
5   | Copyright (c) 1997-2014 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
55PHPAPI void php_srand(long seed TSRMLS_DC);
56PHPAPI long php_rand(TSRMLS_D);
57PHPAPI void php_mt_srand(php_uint32 seed TSRMLS_DC);
58PHPAPI php_uint32 php_mt_rand(TSRMLS_D);
59
60#endif  /* PHP_RAND_H */
61