From: Stanislav Malyshev <stas@php.net>
Date: Fri, 7 Mar 2008 03:36:58 +0000 (+0000)
Subject: improve seed calculation
X-Git-Tag: BEFORE_NEW_PARAMETER_PARSE~688
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=507a7840ed988ca2c7b05c39d2fa7f292a099dbe;p=php

improve seed calculation
# better solution would be to port mt's multi-value seed procedure
---

diff --git a/ext/standard/php_rand.h b/ext/standard/php_rand.h
index 50fddcdf26..804a14b2aa 100644
--- a/ext/standard/php_rand.h
+++ b/ext/standard/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);