stas Fri Mar 7 03:34:47 2008 UTC
Modified files: (Branch: PHP_5_2)
/php-src/ext/standard php_rand.h
Log:
improve seed calculation
# better solution would be to port mt's multi-value seed procedure
http://cvs.php.net/viewvc.cgi/php-src/ext/standard/php_rand.h?r1=1.28.2.1.2.2&r2=1.28.2.1.2.3&diff_format=u
Index: php-src/ext/standard/php_rand.h
diff -u php-src/ext/standard/php_rand.h:1.28.2.1.2.2
php-src/ext/standard/php_rand.h:1.28.2.1.2.3
--- php-src/ext/standard/php_rand.h:1.28.2.1.2.2 Mon Dec 31 07:20:13 2007
+++ php-src/ext/standard/php_rand.h Fri Mar 7 03:34:47 2008
@@ -20,7 +20,7 @@
| Based on code from: Shawn Cokus <[EMAIL PROTECTED]> |
+----------------------------------------------------------------------+
*/
-/* $Id: php_rand.h,v 1.28.2.1.2.2 2007/12/31 07:20:13 sebastian Exp $ */
+/* $Id: php_rand.h,v 1.28.2.1.2.3 2008/03/07 03:34:47 stas Exp $ */
#ifndef PHP_RAND_H
#define PHP_RAND_H
@@ -47,9 +47,9 @@
#define PHP_MT_RAND_MAX ((long) (0x7FFFFFFF)) /* (1<<31) - 1 */
#ifdef PHP_WIN32
-#define GENERATE_SEED() ((long) (time(0) * GetCurrentProcessId() * 1000000 *
php_combined_lcg(TSRMLS_C)))
+#define GENERATE_SEED() (((long) (time(0) * GetCurrentProcessId())) ^ ((long)
(1000000.0 * php_combined_lcg(TSRMLS_C))))
#else
-#define GENERATE_SEED() ((long) (time(0) * getpid() * 1000000 *
php_combined_lcg(TSRMLS_C)))
+#define GENERATE_SEED() (((long) (time(0) * getpid())) ^ ((long) (1000000.0 *
php_combined_lcg(TSRMLS_C)))))
#endif
PHPAPI void php_srand(long seed TSRMLS_DC);
--
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