зеркало из https://github.com/mozilla/gecko-dev.git
Bug 749535 - Part 1: Implement JS_UnwrapObjectAs*Array(). (r=bhackett)
This commit is contained in:
Eric Faust
Родитель
28008c2879
Коммит
c60ea1616e
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@ -1093,6 +1093,35 @@ JS_IsFloat32Array(JSObject *obj, JSContext *cx);
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extern JS_FRIEND_API(JSBool)
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JS_IsFloat64Array(JSObject *obj, JSContext *cx);
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/*
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* Unwrap Typed arrays all at once. Return NULL without throwing if the object
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* cannot be viewed as the correct typed array, or the typed array object on
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* success, filling both outparameters.
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*/
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsInt8Array(JSContext *cx, JSObject *obj, uint32_t *length, int8_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsUint8Array(JSContext *cx, JSObject *obj, uint32_t *length, uint8_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsUint8ClampedArray(JSContext *cx, JSObject *obj, uint32_t *length, uint8_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsInt16Array(JSContext *cx, JSObject *obj, uint32_t *length, int16_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsUint16Array(JSContext *cx, JSObject *obj, uint32_t *length, uint16_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsInt32Array(JSContext *cx, JSObject *obj, uint32_t *length, int32_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsUint32Array(JSContext *cx, JSObject *obj, uint32_t *length, uint32_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsFloat32Array(JSContext *cx, JSObject *obj, uint32_t *length, float **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsFloat64Array(JSContext *cx, JSObject *obj, uint32_t *length, double **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsArrayBufferView(JSContext *cx, JSObject *obj, uint32_t *length, uint8_t **data);
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extern JS_FRIEND_API(JSObject *)
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JS_GetObjectAsArrayBuffer(JSContext *cx, JSObject *obj, uint32_t *length, uint8_t **data);
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/*
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* Get the type of elements in a typed array.
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*
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@ -2939,6 +2939,40 @@ IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Uint32, uint32_t)
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IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Float32, float)
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IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Float64, double)
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#define IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Name, ExternalType, InternalType) \
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JS_FRIEND_API(JSObject *) JS_GetObjectAs ## Name ## Array(JSContext *cx, \
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JSObject *obj, \
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uint32_t *length, \
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ExternalType **data) \
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{ \
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if (obj->isWrapper()) { \
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MOZ_ASSERT(!cx->isExceptionPending()); \
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if (!(obj = UnwrapObjectChecked(cx, obj))) { \
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cx->clearPendingException(); \
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return NULL; \
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} \
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} \
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\
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Class *clasp = obj->getClass(); \
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if (clasp != &TypedArray::classes[TypedArrayTemplate<InternalType>::ArrayTypeID()]) \
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return NULL; \
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\
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*length = obj->getSlot(TypedArray::FIELD_LENGTH).toInt32(); \
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*data = static_cast<ExternalType *>(TypedArray::viewData(obj)); \
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\
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return obj; \
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}
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Int8, int8_t, int8_t)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint8, uint8_t, uint8_t)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint8Clamped, uint8_t, uint8_clamped)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Int16, int16_t, int16_t)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint16, uint16_t, uint16_t)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Int32, int32_t, int32_t)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint32, uint32_t, uint32_t)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Float32, float, float)
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IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Float64, double, double)
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#define IMPL_TYPED_ARRAY_PROTO_CLASS(_typedArray) \
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{ \
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#_typedArray "Prototype", \
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@ -3561,3 +3595,42 @@ JS_GetArrayBufferViewByteLength(JSObject *obj, JSContext *cx)
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? obj->asDataView().byteLength()
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: TypedArray::byteLengthValue(obj).toInt32();
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}
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JS_FRIEND_API(JSObject *)
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JS_GetObjectAsArrayBufferView(JSContext *cx, JSObject *obj,
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uint32_t *length, uint8_t **data)
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{
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if (obj->isWrapper()) {
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if (!(obj = UnwrapObjectChecked(cx, obj))) {
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cx->clearPendingException();
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return NULL;
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}
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}
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if (!(obj->isTypedArray() || obj->isDataView()))
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return NULL;
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*length = obj->isDataView() ? obj->asDataView().byteLength()
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: TypedArray::byteLengthValue(obj).toInt32();
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*data = static_cast<uint8_t *>(obj->isDataView() ? obj->asDataView().dataPointer()
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: TypedArray::viewData(obj));
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return obj;
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}
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JS_FRIEND_API(JSObject *)
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JS_GetObjectAsArrayBuffer(JSContext *cx, JSObject *obj, uint32_t *length, uint8_t **data)
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{
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if (obj->isWrapper()) {
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if (!(obj = UnwrapObjectChecked(cx, obj))) {
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cx->clearPendingException();
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return NULL;
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}
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}
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if (!obj->isArrayBuffer())
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return NULL;
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*length = obj->asArrayBuffer().byteLength();
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*data = obj->asArrayBuffer().dataPointer();
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return obj;
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}
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