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      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 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 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 "JSByteArray.h"
     28 
     29 #include "JSGlobalObject.h"
     30 #include "PropertyNameArray.h"
     31 
     32 using namespace WTF;
     33 
     34 namespace JSC {
     35 
     36 const ClassInfo JSByteArray::s_defaultInfo = { "ByteArray", 0, 0, 0 };
     37 
     38 JSByteArray::JSByteArray(ExecState* exec, NonNullPassRefPtr<Structure> structure, ByteArray* storage, const JSC::ClassInfo* classInfo)
     39     : JSObject(structure)
     40     , m_storage(storage)
     41     , m_classInfo(classInfo)
     42 {
     43     putDirect(exec->globalData().propertyNames->length, jsNumber(exec, m_storage->length()), ReadOnly | DontDelete);
     44 }
     45 
     46 #if !ASSERT_DISABLED
     47 JSByteArray::~JSByteArray()
     48 {
     49     ASSERT(vptr() == JSGlobalData::jsByteArrayVPtr);
     50 }
     51 #endif
     52 
     53 
     54 PassRefPtr<Structure> JSByteArray::createStructure(JSValue prototype)
     55 {
     56     PassRefPtr<Structure> result = Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount);
     57     return result;
     58 }
     59 
     60 bool JSByteArray::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
     61 {
     62     bool ok;
     63     unsigned index = propertyName.toUInt32(&ok, false);
     64     if (ok && canAccessIndex(index)) {
     65         slot.setValue(getIndex(exec, index));
     66         return true;
     67     }
     68     return JSObject::getOwnPropertySlot(exec, propertyName, slot);
     69 }
     70 
     71 bool JSByteArray::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
     72 {
     73     bool ok;
     74     unsigned index = propertyName.toUInt32(&ok, false);
     75     if (ok && canAccessIndex(index)) {
     76         descriptor.setDescriptor(getIndex(exec, index), DontDelete);
     77         return true;
     78     }
     79     return JSObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
     80 }
     81 
     82 bool JSByteArray::getOwnPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
     83 {
     84     if (canAccessIndex(propertyName)) {
     85         slot.setValue(getIndex(exec, propertyName));
     86         return true;
     87     }
     88     return JSObject::getOwnPropertySlot(exec, Identifier::from(exec, propertyName), slot);
     89 }
     90 
     91 void JSByteArray::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
     92 {
     93     bool ok;
     94     unsigned index = propertyName.toUInt32(&ok, false);
     95     if (ok) {
     96         setIndex(exec, index, value);
     97         return;
     98     }
     99     JSObject::put(exec, propertyName, value, slot);
    100 }
    101 
    102 void JSByteArray::put(ExecState* exec, unsigned propertyName, JSValue value)
    103 {
    104     setIndex(exec, propertyName, value);
    105 }
    106 
    107 void JSByteArray::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
    108 {
    109     unsigned length = m_storage->length();
    110     for (unsigned i = 0; i < length; ++i)
    111         propertyNames.add(Identifier::from(exec, i));
    112     JSObject::getOwnPropertyNames(exec, propertyNames, mode);
    113 }
    114 
    115 }
    116 
    117