https://github.com/mozilla/gecko-dev
Tip revision: 1804875c7d34bd21a90f4ed548493559cb624ce3 authored by ffxbld on 26 September 2012, 03:06:39 UTC
Added FENNEC_16_0b5_RELEASE FENNEC_16_0b5_BUILD1 tag(s) for changeset 369866350edb. DONTBUILD CLOSED TREE a=release
Added FENNEC_16_0b5_RELEASE FENNEC_16_0b5_BUILD1 tag(s) for changeset 369866350edb. DONTBUILD CLOSED TREE a=release
Tip revision: 1804875
jstypedarrayinlines.h
/* -*- Mode: c++; c-basic-offset: 4; tab-width: 40; indent-tabs-mode: nil -*- */
/* vim: set ts=40 sw=4 et tw=99: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef jstypedarrayinlines_h
#define jstypedarrayinlines_h
#include "jsapi.h"
#include "jsobj.h"
#include "jstypedarray.h"
#include "jsobjinlines.h"
inline uint32_t
js::ArrayBufferObject::byteLength() const
{
JS_ASSERT(isArrayBuffer());
return getElementsHeader()->length;
}
inline uint8_t *
js::ArrayBufferObject::dataPointer() const
{
return (uint8_t *) elements;
}
inline js::ArrayBufferObject &
JSObject::asArrayBuffer()
{
JS_ASSERT(isArrayBuffer());
return *static_cast<js::ArrayBufferObject *>(this);
}
inline js::DataViewObject &
JSObject::asDataView()
{
JS_ASSERT(isDataView());
return *static_cast<js::DataViewObject *>(this);
}
namespace js {
inline bool
ArrayBufferObject::hasData() const
{
return getClass() == &ArrayBufferClass;
}
static inline int32_t
ClampIntForUint8Array(int32_t x)
{
if (x < 0)
return 0;
if (x > 255)
return 255;
return x;
}
inline Value
TypedArray::lengthValue(JSObject *obj) {
JS_ASSERT(obj->isTypedArray());
return obj->getFixedSlot(FIELD_LENGTH);
}
inline uint32_t
TypedArray::length(JSObject *obj) {
return lengthValue(obj).toInt32();
}
inline Value
TypedArray::byteOffsetValue(JSObject *obj) {
JS_ASSERT(obj->isTypedArray());
return obj->getFixedSlot(FIELD_BYTEOFFSET);
}
inline uint32_t
TypedArray::byteOffset(JSObject *obj) {
return byteOffsetValue(obj).toInt32();
}
inline Value
TypedArray::byteLengthValue(JSObject *obj) {
JS_ASSERT(obj->isTypedArray());
return obj->getFixedSlot(FIELD_BYTELENGTH);
}
inline uint32_t
TypedArray::byteLength(JSObject *obj) {
return byteLengthValue(obj).toInt32();
}
inline uint32_t
TypedArray::type(JSObject *obj) {
JS_ASSERT(obj->isTypedArray());
return obj->getFixedSlot(FIELD_TYPE).toInt32();
}
inline Value
TypedArray::bufferValue(JSObject *obj) {
JS_ASSERT(obj->isTypedArray());
return obj->getFixedSlot(FIELD_BUFFER);
}
inline ArrayBufferObject *
TypedArray::buffer(JSObject *obj) {
return &bufferValue(obj).toObject().asArrayBuffer();
}
inline void *
TypedArray::viewData(JSObject *obj) {
JS_ASSERT(obj->isTypedArray());
return (void *)obj->getPrivate(NUM_FIXED_SLOTS);
}
inline uint32_t
TypedArray::slotWidth(int atype) {
switch (atype) {
case js::TypedArray::TYPE_INT8:
case js::TypedArray::TYPE_UINT8:
case js::TypedArray::TYPE_UINT8_CLAMPED:
return 1;
case js::TypedArray::TYPE_INT16:
case js::TypedArray::TYPE_UINT16:
return 2;
case js::TypedArray::TYPE_INT32:
case js::TypedArray::TYPE_UINT32:
case js::TypedArray::TYPE_FLOAT32:
return 4;
case js::TypedArray::TYPE_FLOAT64:
return 8;
default:
JS_NOT_REACHED("invalid typed array type");
return 0;
}
}
inline int
TypedArray::slotWidth(JSObject *obj) {
return slotWidth(type(obj));
}
inline DataViewObject *
DataViewObject::create(JSContext *cx, uint32_t byteOffset, uint32_t byteLength,
Handle<ArrayBufferObject*> arrayBuffer, JSObject *proto)
{
JS_ASSERT(byteOffset <= INT32_MAX);
JS_ASSERT(byteLength <= INT32_MAX);
RootedObject obj(cx, NewBuiltinClassInstance(cx, &DataViewClass));
if (!obj)
return NULL;
if (proto) {
types::TypeObject *type = proto->getNewType(cx);
if (!type)
return NULL;
obj->setType(type);
} else if (cx->typeInferenceEnabled()) {
if (byteLength >= TypedArray::SINGLETON_TYPE_BYTE_LENGTH) {
if (!obj->setSingletonType(cx))
return NULL;
} else {
jsbytecode *pc;
RootedScript script(cx, cx->stack.currentScript(&pc));
if (script) {
if (!types::SetInitializerObjectType(cx, script, pc, obj))
return NULL;
}
}
}
JS_ASSERT(arrayBuffer->isArrayBuffer());
DataViewObject &dvobj = obj->asDataView();
dvobj.setFixedSlot(BYTEOFFSET_SLOT, Int32Value(byteOffset));
dvobj.setFixedSlot(BYTELENGTH_SLOT, Int32Value(byteLength));
dvobj.setFixedSlot(BUFFER_SLOT, ObjectValue(*arrayBuffer));
dvobj.setPrivate(arrayBuffer->dataPointer() + byteOffset);
JS_ASSERT(byteOffset + byteLength <= arrayBuffer->byteLength());
JS_ASSERT(dvobj.numFixedSlots() == RESERVED_SLOTS);
return &dvobj;
}
inline uint32_t
DataViewObject::byteLength()
{
JS_ASSERT(isDataView());
int32_t length = getReservedSlot(BYTELENGTH_SLOT).toInt32();
JS_ASSERT(length >= 0);
return static_cast<uint32_t>(length);
}
inline uint32_t
DataViewObject::byteOffset()
{
JS_ASSERT(isDataView());
int32_t offset = getReservedSlot(BYTEOFFSET_SLOT).toInt32();
JS_ASSERT(offset >= 0);
return static_cast<uint32_t>(offset);
}
inline void *
DataViewObject::dataPointer()
{
JS_ASSERT(isDataView());
return getPrivate();
}
inline JSObject &
DataViewObject::arrayBuffer()
{
JS_ASSERT(isDataView());
return getReservedSlot(BUFFER_SLOT).toObject();
}
inline bool
DataViewObject::hasBuffer() const
{
JS_ASSERT(isDataView());
return getReservedSlot(BUFFER_SLOT).isObject();
}
inline Value
DataViewObject::bufferValue(DataViewObject &view)
{
return view.hasBuffer() ? ObjectValue(view.arrayBuffer()) : UndefinedValue();
}
inline Value
DataViewObject::byteOffsetValue(DataViewObject &view)
{
return Int32Value(view.byteOffset());
}
inline Value
DataViewObject::byteLengthValue(DataViewObject &view)
{
return Int32Value(view.byteLength());
}
} /* namespace js */
#endif /* jstypedarrayinlines_h */