random32.c
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:3k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hlxclib/stdlib.h"
- #include "hxtypes.h"
- #include "hxtick.h"
- #include "md5.h"
- #include "random32.h"
- static ULONG32 md_32(const unsigned char *string, int length)
- {
- md5_state_t context;
- union {
- char c[16]; /* Flawfinder: ignore */
- ULONG32 x[4];
- } digest;
- ULONG32 r;
- int i;
-
- md5_init (&context);
- md5_append (&context, string, length);
- md5_finish ((unsigned char *)&digest, &context);
- r = 0;
- for (i = 0; i < 3; i++) {
- r ^= digest.x[i];
- }
- return r;
- }
-
- /*
- * Return random unsigned 32-bit quantity. Use 'type' argument if you
- * need to generate several different values in close succession.
- * Functions used to create "s" is reduced, but that should be fine...
- */
- UINT32 random32(int type)
- {
- struct {
- int type;
- UINT32 tick;
- int rand;
- } s;
-
- s.type = type;
- s.tick = HX_GET_TICKCOUNT();
- s.rand = rand();
-
- return md_32((const unsigned char *)&s, sizeof(s));
- }
-