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