diff options
Diffstat (limited to 'src/3rdparty/webkit/JavaScriptCore/runtime/JSByteArray.h')
-rw-r--r-- | src/3rdparty/webkit/JavaScriptCore/runtime/JSByteArray.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/JavaScriptCore/runtime/JSByteArray.h b/src/3rdparty/webkit/JavaScriptCore/runtime/JSByteArray.h new file mode 100644 index 0000000..895200b --- /dev/null +++ b/src/3rdparty/webkit/JavaScriptCore/runtime/JSByteArray.h @@ -0,0 +1,111 @@ +/* + * 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 "ByteArray.h" +#include "JSObject.h" + +namespace JSC { + + class JSByteArray : public JSObject { + friend class Interpreter; + public: + bool canAccessIndex(unsigned i) { return i < m_storage->length(); } + JSValuePtr getIndex(unsigned i) + { + ASSERT(canAccessIndex(i)); + return JSImmediate::from(m_storage->data()[i]); + } + + void setIndex(unsigned i, int value) + { + ASSERT(canAccessIndex(i)); + if (value & ~0xFF) { + if (value < 0) + value = 0; + else + value = 255; + } + m_storage->data()[i] = static_cast<unsigned char>(value); + } + + void setIndex(unsigned i, double value) + { + ASSERT(canAccessIndex(i)); + if (!(value > 0)) // Clamp NaN to 0 + value = 0; + else if (value > 255) + value = 255; + m_storage->data()[i] = static_cast<unsigned char>(value + 0.5); + } + + void setIndex(ExecState* exec, unsigned i, JSValuePtr value) + { + double byteValue = value->toNumber(exec); + if (exec->hadException()) + return; + if (canAccessIndex(i)) + setIndex(i, byteValue); + } + + JSByteArray(ExecState* exec, PassRefPtr<Structure>, ByteArray* storage, const JSC::ClassInfo* = &s_defaultInfo); + static PassRefPtr<Structure> createStructure(JSValuePtr prototype); + + virtual bool getOwnPropertySlot(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertySlot&); + virtual bool getOwnPropertySlot(JSC::ExecState*, unsigned propertyName, JSC::PropertySlot&); + virtual void put(JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSValuePtr, JSC::PutPropertySlot&); + virtual void put(JSC::ExecState*, unsigned propertyName, JSC::JSValuePtr); + + virtual void getPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&); + + virtual const ClassInfo* classInfo() const { return m_classInfo; } + static const ClassInfo s_defaultInfo; + + size_t length() const { return m_storage->length(); } + + ByteArray* storage() const { return m_storage.get(); } + + private: + enum VPtrStealingHackType { VPtrStealingHack }; + JSByteArray(VPtrStealingHackType) + : JSObject(createStructure(jsNull())) + , m_classInfo(0) + { + } + + RefPtr<ByteArray> m_storage; + const ClassInfo* m_classInfo; + }; + + JSByteArray* asByteArray(JSValuePtr value); + inline JSByteArray* asByteArray(JSValuePtr value) + { + return static_cast<JSByteArray*>(asCell(value)); + } +} + +#endif |