1 | /* |
2 | +----------------------------------------------------------------------+ |
3 | | PHP Version 5 | |
4 | +----------------------------------------------------------------------+ |
5 | | Copyright (c) 1997-2015 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) + (long) ((double) ( (double) (__max) - (__min) + 1.0) * ((__n) / ((__tmax) + 1.0))) |
46 | |
47 | /* MT Rand */ |
48 | #define PHP_MT_RAND_MAX ((long) (0x7FFFFFFF)) /* (1<<31) - 1 */ |
49 | |
50 | #ifdef PHP_WIN32 |
51 | #define GENERATE_SEED() (((long) (time(0) * GetCurrentProcessId())) ^ ((long) (1000000.0 * php_combined_lcg(TSRMLS_C)))) |
52 | #else |
53 | #define GENERATE_SEED() (((long) (time(0) * getpid())) ^ ((long) (1000000.0 * php_combined_lcg(TSRMLS_C)))) |
54 | #endif |
55 | |
56 | PHPAPI void php_srand(long seed TSRMLS_DC); |
57 | PHPAPI long php_rand(TSRMLS_D); |
58 | PHPAPI void php_mt_srand(php_uint32 seed TSRMLS_DC); |
59 | PHPAPI php_uint32 php_mt_rand(TSRMLS_D); |
60 | |
61 | #endif /* PHP_RAND_H */ |
62 | |