runtime/JSByteArray.cpp

   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