runtime/Lookup.cpp

   1 /*
   2  *  Copyright (C) 2008 Apple Inc. All rights reserved.
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Lesser General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Lesser General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Lesser General Public
  15  *  License along with this library; if not, write to the Free Software
  16  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  */
  19
  20 #include "config.h"
  21 #include "Lookup.h"
  22
  23 #include "JSFunction.h"
  24 #include "PrototypeFunction.h"
  25
  26 namespace JSC {
  27
  28 void HashTable::createTable(JSGlobalData* globalData) const
  29 {
  30     ASSERT(!table);
  31     int linkIndex = compactHashSizeMask + 1;
  32     HashEntry* entries = new HashEntry[compactSize];
  33     for (int i = 0; i < compactSize; ++i)
  34         entries[i].setKey(0);
  35     for (int i = 0; values[i].key; ++i) {
  36         UString::Rep* identifier = Identifier::add(globalData, values[i].key).releaseRef();
  37         int hashIndex = identifier->existingHash() & compactHashSizeMask;
  38         HashEntry* entry = &entries[hashIndex];
  39
  40         if (entry->key()) {
  41             while (entry->next()) {
  42                 entry = entry->next();
  43             }
  44             ASSERT(linkIndex < compactSize);
  45             entry->setNext(&entries[linkIndex++]);
  46             entry = entry->next();
  47         }
  48
  49         entry->initialize(identifier, values[i].attributes, values[i].value1, values[i].value2
  50 #if ENABLE(JIT)
  51                           , values[i].generator
  52 #endif
  53                           );
  54     }
  55     table = entries;
  56 }
  57
  58 void HashTable::deleteTable() const
  59 {
  60     if (table) {
  61         int max = compactSize;
  62         for (int i = 0; i != max; ++i) {
  63             if (UString::Rep* key = table[i].key())
  64                 key->deref();
  65         }
  66         delete [] table;
  67         table = 0;
  68     }
  69 }
  70
  71 void setUpStaticFunctionSlot(ExecState* exec, const HashEntry* entry, JSObject* thisObj, const Identifier& propertyName, PropertySlot& slot)
  72 {
  73     ASSERT(entry->attributes() & Function);
  74     JSValue* location = thisObj->getDirectLocation(propertyName);
  75
  76     if (!location) {
  77         InternalFunction* function;
  78 #if ENABLE(JIT) && ENABLE(JIT_OPTIMIZE_NATIVE_CALL)
  79         if (entry->generator())
  80             function = new (exec) NativeFunctionWrapper(exec, exec->lexicalGlobalObject()->prototypeFunctionStructure(), entry->functionLength(), propertyName, exec->globalData().getThunk(entry->generator()), entry->function());
  81         else
  82 #endif
  83             function = new (exec) NativeFunctionWrapper(exec, exec->lexicalGlobalObject()->prototypeFunctionStructure(), entry->functionLength(), propertyName, entry->function());
  84
  85         thisObj->putDirectFunction(propertyName, function, entry->attributes());
  86         location = thisObj->getDirectLocation(propertyName);
  87     }
  88
  89     slot.setValueSlot(thisObj, location, thisObj->offsetForLocation(location));
  90 }
  91
  92 } // namespace JSC