/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at http://curl.haxx.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * * $Id: curl_rand.c,v 1.1 2009-09-17 14:23:27 yangtse Exp $ ***************************************************************************/ #include "setup.h" #include <curl/curl.h> #include "curl_rand.h" #define _MPRINTF_REPLACE /* use our functions only */ #include <curl/mprintf.h> #include "curl_memory.h" /* The last #include file should be: */ #include "memdebug.h" /* Private pseudo-random number seed. Unsigned integer >= 32bit. Threads mutual exclusion is not implemented to acess it since we do not require high quality random numbers (only used in form boudary generation). */ static unsigned int randseed; /* Pseudo-random number support. */ unsigned int Curl_rand(void) { unsigned int r; /* Return an unsigned 32-bit pseudo-random number. */ r = randseed = randseed * 1103515245 + 12345; return (r << 16) | ((r >> 16) & 0xFFFF); } void Curl_srand(void) { /* Randomize pseudo-random number sequence. */ randseed = (unsigned int) time(NULL); Curl_rand(); Curl_rand(); Curl_rand(); }