mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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/* vim: set ts=2 sw=2 et tw=79: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_TypedArray_h
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#define mozilla_dom_TypedArray_h
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#include "jsfriendapi.h"
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namespace mozilla {
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namespace dom {
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/*
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* Various typed array classes for argument conversion. We have a base class
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* that has a way of initializing a TypedArray from an existing typed array, and
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* a subclass of the base class that supports creation of a relevant typed array
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* or array buffer object.
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*/
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template<typename T, typename U,
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U* GetData(JSObject*, JSContext*),
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uint32_t GetLength(JSObject*, JSContext*)>
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struct TypedArray_base {
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TypedArray_base(JSContext* cx, JSObject* obj) :
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mData(static_cast<T*>(GetData(obj, cx))),
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mLength(GetLength(obj, cx)),
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mObj(obj)
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{}
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T* const mData;
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const uint32_t mLength;
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JSObject* const mObj;
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};
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template<typename T, typename U,
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U* GetData(JSObject*, JSContext*),
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uint32_t GetLength(JSObject*, JSContext*),
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JSObject* CreateNew(JSContext*, uint32_t)>
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struct TypedArray : public TypedArray_base<T,U,GetData,GetLength> {
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TypedArray(JSContext* cx, JSObject* obj) :
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TypedArray_base<T,U,GetData,GetLength>(cx, obj)
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{}
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static inline JSObject*
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Create(JSContext* cx, nsWrapperCache* creator, uint32_t length,
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T* data = NULL) {
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JSObject* creatorWrapper;
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JSAutoEnterCompartment ac;
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if (creator && (creatorWrapper = creator->GetWrapperPreserveColor())) {
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if (!ac.enter(cx, creatorWrapper)) {
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return NULL;
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}
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}
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JSObject* obj = CreateNew(cx, length);
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if (!obj) {
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return NULL;
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}
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if (data) {
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T* buf = static_cast<T*>(GetData(obj, cx));
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memcpy(buf, data, length*sizeof(T));
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}
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return obj;
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}
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};
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typedef TypedArray<int8_t, int8_t, JS_GetInt8ArrayData, JS_GetTypedArrayLength,
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JS_NewInt8Array>
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Int8Array;
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typedef TypedArray<uint8_t, uint8_t, JS_GetUint8ArrayData,
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JS_GetTypedArrayLength, JS_NewUint8Array>
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Uint8Array;
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typedef TypedArray<uint8_t, uint8_t, JS_GetUint8ClampedArrayData,
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JS_GetTypedArrayLength, JS_NewUint8ClampedArray>
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Uint8ClampedArray;
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typedef TypedArray<int16_t, int16_t, JS_GetInt16ArrayData,
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JS_GetTypedArrayLength, JS_NewInt16Array>
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Int16Array;
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typedef TypedArray<uint16_t, uint16_t, JS_GetUint16ArrayData,
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JS_GetTypedArrayLength, JS_NewUint16Array>
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Uint16Array;
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typedef TypedArray<int32_t, int32_t, JS_GetInt32ArrayData,
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JS_GetTypedArrayLength, JS_NewInt32Array>
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Int32Array;
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typedef TypedArray<uint32_t, uint32_t, JS_GetUint32ArrayData,
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JS_GetTypedArrayLength, JS_NewUint32Array>
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Uint32Array;
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typedef TypedArray<float, float, JS_GetFloat32ArrayData, JS_GetTypedArrayLength,
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JS_NewFloat32Array>
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Float32Array;
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typedef TypedArray<double, double, JS_GetFloat64ArrayData,
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JS_GetTypedArrayLength, JS_NewFloat64Array>
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Float64Array;
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typedef TypedArray_base<uint8_t, void, JS_GetArrayBufferViewData,
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JS_GetArrayBufferViewByteLength>
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ArrayBufferView;
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typedef TypedArray<uint8_t, uint8_t, JS_GetArrayBufferData,
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JS_GetArrayBufferByteLength, JS_NewArrayBuffer>
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ArrayBuffer;
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_TypedArray_h */
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