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/platform/external/webkit/WebCore/bridge/IdentifierRep.cpp

https://github.com/aharish/totoro-gb-opensource-update2
C++ | 111 lines | 64 code | 23 blank | 24 comment | 8 complexity | 97bda2743b60208d30011e74e5b25a6a MD5 | raw file
  1/*
  2 * Copyright (C) 2009 Apple Inc. All rights reserved.
  3 *
  4 * Redistribution and use in source and binary forms, with or without
  5 * modification, are permitted provided that the following conditions
  6 * are met:
  7 * 1. Redistributions of source code must retain the above copyright
  8 *    notice, this list of conditions and the following disclaimer.
  9 * 2. Redistributions in binary form must reproduce the above copyright
 10 *    notice, this list of conditions and the following disclaimer in the
 11 *    documentation and/or other materials provided with the distribution.
 12 *
 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 24 */
 25
 26#include "config.h"
 27#include "IdentifierRep.h"
 28
 29#include "PlatformString.h"
 30#include <runtime/UString.h>
 31#include <wtf/HashMap.h>
 32#include <wtf/StdLibExtras.h>
 33
 34using namespace JSC;
 35
 36namespace WebCore {
 37
 38typedef HashSet<IdentifierRep*> IdentifierSet;
 39
 40static IdentifierSet& identifierSet()
 41{
 42    DEFINE_STATIC_LOCAL(IdentifierSet, identifierSet, ());
 43    return identifierSet;
 44}
 45    
 46typedef HashMap<int, IdentifierRep*> IntIdentifierMap;
 47
 48static IntIdentifierMap& intIdentifierMap()
 49{
 50    DEFINE_STATIC_LOCAL(IntIdentifierMap, intIdentifierMap, ());
 51    return intIdentifierMap;
 52}
 53
 54IdentifierRep* IdentifierRep::get(int intID)
 55{
 56    if (intID == 0 || intID == -1) {
 57        static IdentifierRep* negativeOneAndZeroIdentifiers[2];
 58
 59        IdentifierRep* identifier = negativeOneAndZeroIdentifiers[intID + 1];
 60        if (!identifier) {
 61            identifier = new IdentifierRep(intID);
 62
 63            negativeOneAndZeroIdentifiers[intID + 1] = identifier;
 64        }
 65        
 66        return identifier;
 67    }
 68    
 69    pair<IntIdentifierMap::iterator, bool> result = intIdentifierMap().add(intID, 0); 
 70    if (result.second) {
 71        ASSERT(!result.first->second);
 72        result.first->second = new IdentifierRep(intID);
 73        
 74        identifierSet().add(result.first->second);
 75    }
 76    
 77    return result.first->second;
 78}
 79
 80typedef HashMap<RefPtr<JSC::UString::Rep>, IdentifierRep*> StringIdentifierMap;
 81
 82static StringIdentifierMap& stringIdentifierMap()
 83{
 84    DEFINE_STATIC_LOCAL(StringIdentifierMap, stringIdentifierMap, ());
 85    return stringIdentifierMap;
 86}
 87
 88IdentifierRep* IdentifierRep::get(const char* name)
 89{
 90    ASSERT(name);
 91    if (!name)
 92        return 0;
 93  
 94    UString string = String::fromUTF8WithLatin1Fallback(name, strlen(name));
 95    pair<StringIdentifierMap::iterator, bool> result = stringIdentifierMap().add(string.rep(), 0);
 96    if (result.second) {
 97        ASSERT(!result.first->second);
 98        result.first->second = new IdentifierRep(name);
 99        
100        identifierSet().add(result.first->second);
101    }
102    
103    return result.first->second;
104}
105
106bool IdentifierRep::isValid(IdentifierRep* identifier)
107{
108    return identifierSet().contains(identifier);
109}
110    
111} // namespace WebCore