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author | Steve Block <steveblock@google.com> | 2011-05-13 06:44:40 -0700 |
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committer | Android (Google) Code Review <android-gerrit@google.com> | 2011-05-13 06:44:40 -0700 |
commit | 08014c20784f3db5df3a89b73cce46037b77eb59 (patch) | |
tree | 47749210d31e19e6e2f64036fa8fae2ad693476f /Source/JavaScriptCore/runtime/JSByteArray.h | |
parent | 860220379e56aeb66424861ad602b07ee22b4055 (diff) | |
parent | 4c3661f7918f8b3f139f824efb7855bedccb4c94 (diff) | |
download | external_webkit-08014c20784f3db5df3a89b73cce46037b77eb59.zip external_webkit-08014c20784f3db5df3a89b73cce46037b77eb59.tar.gz external_webkit-08014c20784f3db5df3a89b73cce46037b77eb59.tar.bz2 |
Merge changes Ide388898,Ic49f367c,I1158a808,Iacb6ca5d,I2100dd3a,I5c1abe54,Ib0ef9902,I31dbc523,I570314b3
* changes:
Merge WebKit at r75315: Update WebKit version
Merge WebKit at r75315: Add FrameLoaderClient PageCache stubs
Merge WebKit at r75315: Stub out AXObjectCache::remove()
Merge WebKit at r75315: Fix ImageBuffer
Merge WebKit at r75315: Fix PluginData::initPlugins()
Merge WebKit at r75315: Fix conflicts
Merge WebKit at r75315: Fix Makefiles
Merge WebKit at r75315: Move Android-specific WebCore files to Source
Merge WebKit at r75315: Initial merge by git.
Diffstat (limited to 'Source/JavaScriptCore/runtime/JSByteArray.h')
-rw-r--r-- | Source/JavaScriptCore/runtime/JSByteArray.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/runtime/JSByteArray.h b/Source/JavaScriptCore/runtime/JSByteArray.h new file mode 100644 index 0000000..44bae2d --- /dev/null +++ b/Source/JavaScriptCore/runtime/JSByteArray.h @@ -0,0 +1,116 @@ +/* + * Copyright (C) 2009 Apple Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef JSByteArray_h +#define JSByteArray_h + +#include "JSObject.h" + +#include <wtf/ByteArray.h> + +namespace JSC { + + class JSByteArray : public JSObject { + friend class JSGlobalData; + public: + bool canAccessIndex(unsigned i) { return i < m_storage->length(); } + JSValue getIndex(ExecState*, unsigned i) + { + ASSERT(canAccessIndex(i)); + return jsNumber(m_storage->data()[i]); + } + + void setIndex(unsigned i, int value) + { + ASSERT(canAccessIndex(i)); + m_storage->data()[i] = static_cast<unsigned char>(value); + } + + void setIndex(unsigned i, double value) + { + ASSERT(canAccessIndex(i)); + // The largest integer value that a double can represent without loss of precision + // is 2^53. long long is the smallest integral type that gives correct results + // when casting numbers larger than 2^31 from a value of type double. + m_storage->data()[i] = static_cast<unsigned char>(static_cast<long long>(value)); + } + + void setIndex(ExecState* exec, unsigned i, JSValue value) + { + double byteValue = value.toNumber(exec); + if (exec->hadException()) + return; + if (canAccessIndex(i)) + setIndex(i, byteValue); + } + + JSByteArray(ExecState* exec, NonNullPassRefPtr<Structure>, WTF::ByteArray* storage, const JSC::ClassInfo* = &s_defaultInfo); + static PassRefPtr<Structure> createStructure(JSValue prototype); + + virtual bool getOwnPropertySlot(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertySlot&); + virtual bool getOwnPropertySlot(JSC::ExecState*, unsigned propertyName, JSC::PropertySlot&); + virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); + virtual void put(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSValue, JSC::PutPropertySlot&); + virtual void put(JSC::ExecState*, unsigned propertyName, JSC::JSValue); + + virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties); + + virtual const ClassInfo* classInfo() const { return m_classInfo; } + static const ClassInfo s_defaultInfo; + + size_t length() const { return m_storage->length(); } + + WTF::ByteArray* storage() const { return m_storage.get(); } + +#if !ASSERT_DISABLED + virtual ~JSByteArray(); +#endif + + protected: + static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesGetPropertyNames | JSObject::StructureFlags; + + private: + enum VPtrStealingHackType { VPtrStealingHack }; + JSByteArray(VPtrStealingHackType) + : JSObject(createStructure(jsNull())) + , m_classInfo(0) + { + } + + RefPtr<WTF::ByteArray> m_storage; + const ClassInfo* m_classInfo; + }; + + JSByteArray* asByteArray(JSValue value); + inline JSByteArray* asByteArray(JSValue value) + { + return static_cast<JSByteArray*>(value.asCell()); + } + + inline bool isJSByteArray(JSGlobalData* globalData, JSValue v) { return v.isCell() && v.asCell()->vptr() == globalData->jsByteArrayVPtr; } + +} // namespace JSC + +#endif // JSByteArray_h |