JSCTypedArrayStubs.h

   1 /*
   2  * Copyright (C) 2012 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 #ifndef JSCTypedArrayStubs_h
  27 #define JSCTypedArrayStubs_h
  28
  29 #include "JSObject.h"
  30 #include "ObjectPrototype.h"
  31 #include <wtf/Float32Array.h>
  32 #include <wtf/Float64Array.h>
  33 #include <wtf/Forward.h>
  34 #include <wtf/Int16Array.h>
  35 #include <wtf/Int32Array.h>
  36 #include <wtf/Int8Array.h>
  37 #include <wtf/Uint16Array.h>
  38 #include <wtf/Uint32Array.h>
  39 #include <wtf/Uint8Array.h>
  40 #include <wtf/Uint8ClampedArray.h>
  41
  42 namespace JSC {
  43
  44 #define TYPED_ARRAY(name, type) \
  45 class JS##name##Array : public JSNonFinalObject { \
  46 public: \
  47     typedef JSNonFinalObject Base; \
  48     static JS##name##Array* create(JSC::Structure* structure, JSGlobalObject* globalObject, PassRefPtr<name##Array> impl) \
  49     { \
  50         JS##name##Array* ptr = new (NotNull, JSC::allocateCell<JS##name##Array>(globalObject->globalData().heap)) JS##name##Array(structure, globalObject, impl); \
  51         ptr->finishCreation(globalObject->globalData()); \
  52         return ptr; \
  53     }\
  54 \
  55     static bool getOwnPropertySlot(JSC::JSCell*, JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertySlot&);\
  56     static bool getOwnPropertyDescriptor(JSC::JSObject*, JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertyDescriptor&);\
  57     static bool getOwnPropertySlotByIndex(JSC::JSCell*, JSC::ExecState*, unsigned propertyName, JSC::PropertySlot&);\
  58     static void put(JSC::JSCell*, JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSValue, JSC::PutPropertySlot&);\
  59     static void putByIndex(JSC::JSCell*, JSC::ExecState*, unsigned propertyName, JSC::JSValue, bool);\
  60     static const JSC::ClassInfo s_info;\
  61 \
  62     static JSC::Structure* createStructure(JSC::JSGlobalData& globalData, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)\
  63     {\
  64         return JSC::Structure::create(globalData, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), &s_info);\
  65     }\
  66 \
  67     static void getOwnPropertyNames(JSC::JSObject*, JSC::ExecState*, JSC::PropertyNameArray&, JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);\
  68     static JSC::JSValue getConstructor(JSC::ExecState*, JSC::JSGlobalObject*);\
  69 \
  70     static const JSC::TypedArrayType TypedArrayStorageType = JSC::TypedArray##name;\
  71     uint32_t m_storageLength;\
  72     type* m_storage;\
  73     RefPtr<name##Array> m_impl;\
  74 protected:\
  75     JS##name##Array(JSC::Structure*, JSGlobalObject*, PassRefPtr<name##Array>);\
  76     void finishCreation(JSC::JSGlobalData&);\
  77     static const unsigned StructureFlags = JSC::OverridesGetPropertyNames | JSC::OverridesGetOwnPropertySlot | Base::StructureFlags;\
  78     JSC::JSValue getByIndex(JSC::ExecState*, unsigned index);\
  79     void indexSetter(JSC::ExecState*, unsigned index, JSC::JSValue);\
  80 };\
  81 \
  82 const ClassInfo JS##name##Array::s_info = { #name "Array" , &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JS##name##Array) };\
  83 \
  84 JS##name##Array::JS##name##Array(Structure* structure, JSGlobalObject* globalObject, PassRefPtr<name##Array> impl)\
  85     : Base(globalObject->globalData(), structure)\
  86     , m_impl(impl)\
  87 {\
  88 }\
  89 \
  90 void JS##name##Array::finishCreation(JSGlobalData& globalData)\
  91 {\
  92     Base::finishCreation(globalData);\
  93     TypedArrayDescriptor descriptor(&JS##name##Array::s_info, OBJECT_OFFSETOF(JS##name##Array, m_storage), OBJECT_OFFSETOF(JS##name##Array, m_storageLength));\
  94     globalData.registerTypedArrayDescriptor(m_impl.get(), descriptor);\
  95     m_storage = m_impl->data();\
  96     m_storageLength = m_impl->length();\
  97     putDirect(globalData, globalData.propertyNames->length, jsNumber(m_storageLength), DontDelete | ReadOnly | DontEnum); \
  98     ASSERT(inherits(&s_info));\
  99 }\
 100 \
 101 bool JS##name##Array::getOwnPropertySlot(JSCell* cell, ExecState* exec, const Identifier& propertyName, PropertySlot& slot)\
 102 {\
 103     JS##name##Array* thisObject = jsCast<JS##name##Array*>(cell);\
 104     ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);\
 105     bool ok;\
 106     unsigned index = propertyName.toUInt32(ok);\
 107     if (ok && index < thisObject->m_storageLength) {\
 108         slot.setValue(thisObject->getByIndex(exec, index));\
 109         return true;\
 110     }\
 111     return Base::getOwnPropertySlot(cell, exec, propertyName, slot);\
 112 }\
 113 \
 114 bool JS##name##Array::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)\
 115 {\
 116     JS##name##Array* thisObject = jsCast<JS##name##Array*>(object);\
 117     ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);\
 118     bool ok;\
 119     unsigned index = propertyName.toUInt32(ok);\
 120     if (ok && index < thisObject->m_storageLength) {\
 121         descriptor.setDescriptor(thisObject->getByIndex(exec, index), DontDelete);\
 122         return true;\
 123     }\
 124     return Base::getOwnPropertyDescriptor(object, exec, propertyName, descriptor);\
 125 }\
 126 \
 127 bool JS##name##Array::getOwnPropertySlotByIndex(JSCell* cell, ExecState* exec, unsigned propertyName, PropertySlot& slot)\
 128 {\
 129     JS##name##Array* thisObject = jsCast<JS##name##Array*>(cell);\
 130     ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);\
 131     if (propertyName < thisObject->m_storageLength) {\
 132         slot.setValue(thisObject->getByIndex(exec, propertyName));\
 133         return true;\
 134     }\
 135     return thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, Identifier::from(exec, propertyName), slot);\
 136 }\
 137 \
 138 void JS##name##Array::put(JSCell* cell, ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)\
 139 {\
 140     JS##name##Array* thisObject = jsCast<JS##name##Array*>(cell);\
 141     ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);\
 142     bool ok;\
 143     unsigned index = propertyName.toUInt32(ok);\
 144     if (ok) {\
 145         thisObject->indexSetter(exec, index, value);\
 146         return;\
 147     }\
 148     Base::put(thisObject, exec, propertyName, value, slot);\
 149 }\
 150 \
 151 void JS##name##Array::indexSetter(JSC::ExecState* exec, unsigned index, JSC::JSValue value) \
 152 {\
 153     m_impl->set(index, value.toNumber(exec));\
 154 }\
 155 \
 156 void JS##name##Array::putByIndex(JSCell* cell, ExecState* exec, unsigned propertyName, JSValue value, bool)\
 157 {\
 158     JS##name##Array* thisObject = jsCast<JS##name##Array*>(cell);\
 159     ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);\
 160     thisObject->indexSetter(exec, propertyName, value);\
 161     return;\
 162 }\
 163 \
 164 void JS##name##Array::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)\
 165 {\
 166     JS##name##Array* thisObject = jsCast<JS##name##Array*>(object);\
 167     ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);\
 168     for (unsigned i = 0; i < thisObject->m_storageLength; ++i)\
 169         propertyNames.add(Identifier::from(exec, i));\
 170     Base::getOwnPropertyNames(thisObject, exec, propertyNames, mode);\
 171 }\
 172 \
 173 JSValue JS##name##Array::getByIndex(ExecState*, unsigned index)\
 174 {\
 175     ASSERT_GC_OBJECT_INHERITS(this, &s_info);\
 176     type result = m_impl->item(index);\
 177     if (isnan((double)result))\
 178         return jsNaN();\
 179     return JSValue(result);\
 180 }\
 181 static EncodedJSValue JSC_HOST_CALL constructJS##name##Array(ExecState* callFrame) { \
 182     if (callFrame->argumentCount() < 1) \
 183         return JSValue::encode(jsUndefined()); \
 184     int32_t length = callFrame->argument(0).toInt32(callFrame); \
 185     if (length < 0) \
 186         return JSValue::encode(jsUndefined()); \
 187     Structure* structure = JS##name##Array::createStructure(callFrame->globalData(), callFrame->lexicalGlobalObject(), callFrame->lexicalGlobalObject()->objectPrototype()); \
 188     return JSValue::encode(JS##name##Array::create(structure, callFrame->lexicalGlobalObject(), name##Array::create(length)));\
 189 }
 190
 191 TYPED_ARRAY(Uint8, uint8_t);
 192 TYPED_ARRAY(Uint8Clamped, uint8_t);
 193 TYPED_ARRAY(Uint16, uint16_t);
 194 TYPED_ARRAY(Uint32, uint32_t);
 195 TYPED_ARRAY(Int8, int8_t);
 196 TYPED_ARRAY(Int16, int16_t);
 197 TYPED_ARRAY(Int32, int32_t);
 198 TYPED_ARRAY(Float32, float);
 199 TYPED_ARRAY(Float64, double);
 200
 201 }
 202
 203 #endif