hxmaputils.cpp
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上传日期:2007-06-06
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- /* ***** 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 "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;
- }