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", 0, 0, 0 };
  37
  38 JSByteArray::JSByteArray(ExecState* exec, PassRefPtr<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 PassRefPtr<Structure> JSByteArray::createStructure(JSValuePtr prototype)
  47 {
  48     PassRefPtr<Structure> result = Structure::create(prototype, TypeInfo(ObjectType));
  49     return result;
  50 }
  51
  52 bool JSByteArray::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
  53 {
  54     bool ok;
  55     unsigned index = propertyName.toUInt32(&ok, false);
  56     if (ok && canAccessIndex(index)) {
  57         slot.setValue(getIndex(exec, index));
  58         return true;
  59     }
  60     return JSObject::getOwnPropertySlot(exec, propertyName, slot);
  61 }
  62
  63 bool JSByteArray::getOwnPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
  64 {
  65     if (canAccessIndex(propertyName)) {
  66         slot.setValue(getIndex(exec, propertyName));
  67         return true;
  68     }
  69     return JSObject::getOwnPropertySlot(exec, Identifier::from(exec, propertyName), slot);
  70 }
  71
  72 void JSByteArray::put(ExecState* exec, const Identifier& propertyName, JSValuePtr value, PutPropertySlot& slot)
  73 {
  74     bool ok;
  75     unsigned index = propertyName.toUInt32(&ok, false);
  76     if (ok) {
  77         setIndex(exec, index, value);
  78         return;
  79     }
  80     JSObject::put(exec, propertyName, value, slot);
  81 }
  82
  83 void JSByteArray::put(ExecState* exec, unsigned propertyName, JSValuePtr value)
  84 {
  85     setIndex(exec, propertyName, value);
  86 }
  87
  88 void JSByteArray::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
  89 {
  90     unsigned length = m_storage->length();
  91     for (unsigned i = 0; i < length; ++i)
  92         propertyNames.add(Identifier::from(exec, i));
  93     JSObject::getPropertyNames(exec, propertyNames);
  94 }
  95
  96 }
  97