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, 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