hxmaputils.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: hxmaputils.cpp,v 1.5.32.3 2004/07/09 01:45:59 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (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.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * 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 "hxmaputils.h"
- #include "hlxclib/ctype.h"
- #include "hlxclib/string.h"
- DECLARE_ITEMVEC_IMP(HlxMap,IntVec_t, int, 0, 0, 0);
- ULONG32 HlxMap::StrHashFunc (const char* key, bool bCaseSens)
- {
- // XXXSAB: Need something to reasonably distribute strings...anyone
- // have an idea?
- ULONG32 ret = 0;
- if (key)
- {
- // XOR together sizeof(ULONG32) chunks of the key string...
- static const int wordSize = sizeof(ULONG32);
- const char* keySrc = key;
- int byteLen = strlen(key);
- int wordLen = byteLen / wordSize;
-
- ULONG32 intWord;
- char* pCharWord = (char*)&intWord;
- for (int i = 0; i < wordLen; ++i)
- {
- strncpy (pCharWord, keySrc, wordSize); /* Flawfinder: ignore */
- keySrc += wordSize; byteLen -= wordSize;
- if (! bCaseSens)
- {
- // If case INsensitive, downshift on the way into the
- // hash algorithm.
- char* pCurChar = pCharWord;
- for (int charIdx = 0;
- charIdx < wordSize;
- ++charIdx, ++pCurChar)
- {
- if (isupper(*(pCurChar)))
- *pCurChar = tolower(*pCurChar);
- }
- }
- ret ^= intWord;
- }
- if (byteLen > 0)
- {
- HX_ASSERT (byteLen < wordSize);
- intWord = 0;
- strncpy (pCharWord, keySrc, byteLen); /* Flawfinder: ignore */
- if (! bCaseSens)
- {
- // If case INsensitive, downshift on the way into the
- // hash algorithm.
- char* pCurChar = pCharWord;
- for (int charIdx = 0;
- charIdx < byteLen;
- ++charIdx, ++pCurChar)
- {
- if (isupper(*(pCurChar)))
- *pCurChar = tolower(*pCurChar);
- }
- }
- ret ^= intWord;
- }
- }
- #ifdef XXXSAB
- printf ("StrHashFunc("%s", %s) -> %dn",
- key,
- bCaseSens ? "true" : "false",
- ret);
- #endif /* XXXSAB */
- return ret;
- }