зеркало из https://github.com/mozilla/gecko-dev.git
136 строки
3.5 KiB
C++
136 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is C++ hashtable templates.
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*
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* The Initial Developer of the Original Code is
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* Benjamin Smedberg.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsTHashtable.h"
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#include "nsHashKeys.h"
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#include "prbit.h"
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PRUint32
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HashString( const nsAString& aStr )
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{
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PRUint32 code = 0;
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#ifdef MOZILLA_INTERNAL_API
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nsAString::const_iterator begin, end;
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aStr.BeginReading(begin);
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aStr.EndReading(end);
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#else
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const PRUnichar *begin, *end;
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PRUint32 len = NS_StringGetData(aStr, &begin);
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end = begin + len;
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#endif
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while (begin != end) {
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code = PR_ROTATE_LEFT32(code, 4) ^ PRUint32(*begin);
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++begin;
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}
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return code;
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}
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PRUint32
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HashString( const nsACString& aStr )
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{
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PRUint32 code = 0;
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#ifdef MOZILLA_INTERNAL_API
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nsACString::const_iterator begin, end;
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aStr.BeginReading(begin);
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aStr.EndReading(end);
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#else
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const char *begin, *end;
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PRUint32 len = NS_CStringGetData(aStr, &begin);
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end = begin + len;
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#endif
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while (begin != end) {
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code = PR_ROTATE_LEFT32(code, 4) ^ PRUint32(*begin);
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++begin;
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}
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return code;
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}
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PRUint32
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HashString(const char *str)
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{
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PRUint32 code = 0;
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while (*str) {
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code = PR_ROTATE_LEFT32(code, 4) ^ PRUint32(*str);
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++str;
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}
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return code;
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}
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PRUint32
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HashString(const PRUnichar *str)
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{
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PRUint32 code = 0;
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while (*str) {
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code = PR_ROTATE_LEFT32(code, 4) ^ PRUint32(*str);
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++str;
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}
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return code;
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}
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PLDHashOperator
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PL_DHashStubEnumRemove(PLDHashTable *table,
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PLDHashEntryHdr *entry,
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PRUint32 ordinal,
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void *userarg)
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{
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return PL_DHASH_REMOVE;
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}
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PRUint32 nsIDHashKey::HashKey(const nsID* id)
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{
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PRUint32 h = id->m0;
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PRUint32 i;
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h = PR_ROTATE_LEFT32(h, 4) ^ id->m1;
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h = PR_ROTATE_LEFT32(h, 4) ^ id->m2;
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for (i = 0; i < 8; i++)
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h = PR_ROTATE_LEFT32(h, 4) ^ id->m3[i];
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return h;
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}
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