JavaScriptCore/kjs/lookup.cpp

/*
 *  Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include "config.h"
#include "lookup.h"

#include "PrototypeFunction.h"

namespace JSC {

void HashTable::createTable(JSGlobalData* globalData) const
{
    ASSERT(!table);
    HashEntry* entries = new HashEntry[hashSizeMask + 1];
    for (int i = 0; i <= hashSizeMask; ++i)
        entries[i].key = 0;
    for (int i = 0; values[i].key; ++i) {
        UString::Rep* identifier = Identifier::add(globalData, values[i].key).releaseRef();
        int hashIndex = identifier->computedHash() & hashSizeMask;
        ASSERT(!entries[hashIndex].key);
        entries[hashIndex].key = identifier;
        entries[hashIndex].integerValue = values[i].value;
        entries[hashIndex].attributes = values[i].attributes;
        entries[hashIndex].length = values[i].length;
    }
    table = entries;
}

void HashTable::deleteTable() const
{
    if (table) {
        for (int i = 0; i != hashSizeMask + 1; ++i) {
            if (UString::Rep* key = table[i].key)
                key->deref();
        }
        delete[] table;
        table = 0;
    }
}

JSValue* staticFunctionGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)
{
    // Look for cached value in dynamic map of properties (in JSObject)
    ASSERT(slot.slotBase()->isObject());
    JSObject* thisObj = static_cast<JSObject*>(slot.slotBase());
    JSValue* cachedVal = thisObj->getDirect(propertyName);
    if (cachedVal)
        return cachedVal;

    const HashEntry* entry = slot.staticEntry();
    JSValue* val = new (exec) PrototypeFunction(exec, entry->length, propertyName, entry->functionValue);
    thisObj->putDirect(propertyName, val, entry->attributes);
    return val;
}

void setUpStaticFunctionSlot(ExecState* exec, const HashEntry* entry, JSObject* thisObj, const Identifier& propertyName, PropertySlot& slot)
{
    ASSERT(entry->attributes & Function);
    JSValue** location = thisObj->getDirectLocation(propertyName);
 
    if (!location) {
        PrototypeFunction* function = new (exec) PrototypeFunction(exec, entry->length, propertyName, entry->functionValue);
        thisObj->putDirect(propertyName, function, entry->attributes);
        location = thisObj->getDirectLocation(propertyName);
    }
    
    slot.setValueSlot(thisObj, location, thisObj->offsetForLocation(location));
}

} // namespace JSC