| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * 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. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "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 THE COPYRIGHT |
| // OWNER 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. |
| |
| "use strict"; |
| |
| // This file relies on the fact that the following declaration has been made |
| // in runtime.js: |
| // var $Array = global.Array; |
| var $ArrayBuffer = global.ArrayBuffer; |
| |
| |
| // --------------- Typed Arrays --------------------- |
| macro TYPED_ARRAYS(FUNCTION) |
| // arrayIds below should be synchronized with Runtime_TypedArrayInitialize. |
| FUNCTION(1, Uint8Array, 1) |
| FUNCTION(2, Int8Array, 1) |
| FUNCTION(3, Uint16Array, 2) |
| FUNCTION(4, Int16Array, 2) |
| FUNCTION(5, Uint32Array, 4) |
| FUNCTION(6, Int32Array, 4) |
| FUNCTION(7, Float32Array, 4) |
| FUNCTION(8, Float64Array, 8) |
| FUNCTION(9, Uint8ClampedArray, 1) |
| endmacro |
| |
| macro TYPED_ARRAY_CONSTRUCTOR(ARRAY_ID, NAME, ELEMENT_SIZE) |
| function NAMEConstructByArrayBuffer(obj, buffer, byteOffset, length) { |
| var bufferByteLength = buffer.byteLength; |
| var offset; |
| if (IS_UNDEFINED(byteOffset)) { |
| offset = 0; |
| } else { |
| offset = ToPositiveInteger(byteOffset, "invalid_typed_array_length"); |
| |
| if (offset % ELEMENT_SIZE !== 0) { |
| throw MakeRangeError("invalid_typed_array_alignment", |
| "start offset", "NAME", ELEMENT_SIZE); |
| } |
| if (offset > bufferByteLength) { |
| throw MakeRangeError("invalid_typed_array_offset"); |
| } |
| } |
| |
| var newByteLength; |
| var newLength; |
| if (IS_UNDEFINED(length)) { |
| if (bufferByteLength % ELEMENT_SIZE !== 0) { |
| throw MakeRangeError("invalid_typed_array_alignment", |
| "byte length", "NAME", ELEMENT_SIZE); |
| } |
| newByteLength = bufferByteLength - offset; |
| newLength = newByteLength / ELEMENT_SIZE; |
| } else { |
| var newLength = ToPositiveInteger(length, "invalid_typed_array_length"); |
| newByteLength = newLength * ELEMENT_SIZE; |
| } |
| if ((offset + newByteLength > bufferByteLength) |
| || (newLength > %MaxSmi())) { |
| throw MakeRangeError("invalid_typed_array_length"); |
| } |
| %TypedArrayInitialize(obj, ARRAY_ID, buffer, offset, newByteLength); |
| } |
| |
| function NAMEConstructByLength(obj, length) { |
| var l = IS_UNDEFINED(length) ? |
| 0 : ToPositiveInteger(length, "invalid_typed_array_length"); |
| if (l > %MaxSmi()) { |
| throw MakeRangeError("invalid_typed_array_length"); |
| } |
| var byteLength = l * ELEMENT_SIZE; |
| var buffer = new $ArrayBuffer(byteLength); |
| %TypedArrayInitialize(obj, ARRAY_ID, buffer, 0, byteLength); |
| } |
| |
| function NAMEConstructByArrayLike(obj, arrayLike) { |
| var length = arrayLike.length; |
| var l = ToPositiveInteger(length, "invalid_typed_array_length"); |
| if (l > %MaxSmi()) { |
| throw MakeRangeError("invalid_typed_array_length"); |
| } |
| if(!%TypedArrayInitializeFromArrayLike(obj, ARRAY_ID, arrayLike, l)) { |
| for (var i = 0; i < l; i++) { |
| // It is crucial that we let any execptions from arrayLike[i] |
| // propagate outside the function. |
| obj[i] = arrayLike[i]; |
| } |
| } |
| } |
| |
| function NAMEConstructor(arg1, arg2, arg3) { |
| |
| if (%_IsConstructCall()) { |
| if (IS_ARRAYBUFFER(arg1)) { |
| NAMEConstructByArrayBuffer(this, arg1, arg2, arg3); |
| } else if (IS_NUMBER(arg1) || IS_STRING(arg1) || |
| IS_BOOLEAN(arg1) || IS_UNDEFINED(arg1)) { |
| NAMEConstructByLength(this, arg1); |
| } else { |
| NAMEConstructByArrayLike(this, arg1); |
| } |
| } else { |
| throw MakeTypeError("constructor_not_function", ["NAME"]) |
| } |
| } |
| endmacro |
| |
| TYPED_ARRAYS(TYPED_ARRAY_CONSTRUCTOR) |
| |
| function TypedArrayGetBuffer() { |
| return %TypedArrayGetBuffer(this); |
| } |
| |
| function TypedArrayGetByteLength() { |
| return %TypedArrayGetByteLength(this); |
| } |
| |
| function TypedArrayGetByteOffset() { |
| return %TypedArrayGetByteOffset(this); |
| } |
| |
| function TypedArrayGetLength() { |
| return %TypedArrayGetLength(this); |
| } |
| |
| function CreateSubArray(elementSize, constructor) { |
| return function(begin, end) { |
| var srcLength = %TypedArrayGetLength(this); |
| var beginInt = TO_INTEGER(begin); |
| if (beginInt < 0) { |
| beginInt = MathMax(0, srcLength + beginInt); |
| } else { |
| beginInt = MathMin(srcLength, beginInt); |
| } |
| |
| var endInt = IS_UNDEFINED(end) ? srcLength : TO_INTEGER(end); |
| if (endInt < 0) { |
| endInt = MathMax(0, srcLength + endInt); |
| } else { |
| endInt = MathMin(endInt, srcLength); |
| } |
| if (endInt < beginInt) { |
| endInt = beginInt; |
| } |
| var newLength = endInt - beginInt; |
| var beginByteOffset = |
| %TypedArrayGetByteOffset(this) + beginInt * elementSize; |
| return new constructor(%TypedArrayGetBuffer(this), |
| beginByteOffset, newLength); |
| } |
| } |
| |
| function TypedArraySetFromArrayLike(target, source, sourceLength, offset) { |
| if (offset > 0) { |
| for (var i = 0; i < sourceLength; i++) { |
| target[offset + i] = source[i]; |
| } |
| } |
| else { |
| for (var i = 0; i < sourceLength; i++) { |
| target[i] = source[i]; |
| } |
| } |
| } |
| |
| function TypedArraySetFromOverlappingTypedArray(target, source, offset) { |
| var sourceElementSize = source.BYTES_PER_ELEMENT; |
| var targetElementSize = target.BYTES_PER_ELEMENT; |
| var sourceLength = source.length; |
| |
| // Copy left part. |
| function CopyLeftPart() { |
| // First un-mutated byte after the next write |
| var targetPtr = target.byteOffset + (offset + 1) * targetElementSize; |
| // Next read at sourcePtr. We do not care for memory changing before |
| // sourcePtr - we have already copied it. |
| var sourcePtr = source.byteOffset; |
| for (var leftIndex = 0; |
| leftIndex < sourceLength && targetPtr <= sourcePtr; |
| leftIndex++) { |
| target[offset + leftIndex] = source[leftIndex]; |
| targetPtr += targetElementSize; |
| sourcePtr += sourceElementSize; |
| } |
| return leftIndex; |
| } |
| var leftIndex = CopyLeftPart(); |
| |
| // Copy rigth part; |
| function CopyRightPart() { |
| // First unmutated byte before the next write |
| var targetPtr = |
| target.byteOffset + (offset + sourceLength - 1) * targetElementSize; |
| // Next read before sourcePtr. We do not care for memory changing after |
| // sourcePtr - we have already copied it. |
| var sourcePtr = |
| source.byteOffset + sourceLength * sourceElementSize; |
| for(var rightIndex = sourceLength - 1; |
| rightIndex >= leftIndex && targetPtr >= sourcePtr; |
| rightIndex--) { |
| target[offset + rightIndex] = source[rightIndex]; |
| targetPtr -= targetElementSize; |
| sourcePtr -= sourceElementSize; |
| } |
| return rightIndex; |
| } |
| var rightIndex = CopyRightPart(); |
| |
| var temp = new $Array(rightIndex + 1 - leftIndex); |
| for (var i = leftIndex; i <= rightIndex; i++) { |
| temp[i - leftIndex] = source[i]; |
| } |
| for (i = leftIndex; i <= rightIndex; i++) { |
| target[offset + i] = temp[i - leftIndex]; |
| } |
| } |
| |
| function TypedArraySet(obj, offset) { |
| var intOffset = IS_UNDEFINED(offset) ? 0 : TO_INTEGER(offset); |
| if (intOffset < 0) { |
| throw MakeTypeError("typed_array_set_negative_offset"); |
| } |
| switch (%TypedArraySetFastCases(this, obj, intOffset)) { |
| // These numbers should be synchronized with runtime.cc. |
| case 0: // TYPED_ARRAY_SET_TYPED_ARRAY_SAME_TYPE |
| return; |
| case 1: // TYPED_ARRAY_SET_TYPED_ARRAY_OVERLAPPING |
| TypedArraySetFromOverlappingTypedArray(this, obj, intOffset); |
| return; |
| case 2: // TYPED_ARRAY_SET_TYPED_ARRAY_NONOVERLAPPING |
| TypedArraySetFromArrayLike(this, obj, obj.length, intOffset); |
| return; |
| case 3: // TYPED_ARRAY_SET_NON_TYPED_ARRAY |
| var l = obj.length; |
| if (IS_UNDEFINED(l)) { |
| if (IS_NUMBER(obj)) { |
| // For number as a first argument, throw TypeError |
| // instead of silently ignoring the call, so that |
| // the user knows (s)he did something wrong. |
| // (Consistent with Firefox and Blink/WebKit) |
| throw MakeTypeError("invalid_argument"); |
| } |
| return; |
| } |
| if (intOffset + l > this.length) { |
| throw MakeRangeError("typed_array_set_source_too_large"); |
| } |
| TypedArraySetFromArrayLike(this, obj, l, intOffset); |
| return; |
| } |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| function SetupTypedArray(constructor, fun, elementSize) { |
| %CheckIsBootstrapping(); |
| %SetCode(constructor, fun); |
| %FunctionSetPrototype(constructor, new $Object()); |
| |
| %SetProperty(constructor, "BYTES_PER_ELEMENT", elementSize, |
| READ_ONLY | DONT_ENUM | DONT_DELETE); |
| %SetProperty(constructor.prototype, |
| "constructor", constructor, DONT_ENUM); |
| %SetProperty(constructor.prototype, |
| "BYTES_PER_ELEMENT", elementSize, |
| READ_ONLY | DONT_ENUM | DONT_DELETE); |
| InstallGetter(constructor.prototype, "buffer", TypedArrayGetBuffer); |
| InstallGetter(constructor.prototype, "byteOffset", TypedArrayGetByteOffset); |
| InstallGetter(constructor.prototype, "byteLength", TypedArrayGetByteLength); |
| InstallGetter(constructor.prototype, "length", TypedArrayGetLength); |
| |
| InstallFunctions(constructor.prototype, DONT_ENUM, $Array( |
| "subarray", CreateSubArray(elementSize, constructor), |
| "set", TypedArraySet |
| )); |
| } |
| |
| macro SETUP_TYPED_ARRAY(ARRAY_ID, NAME, ELEMENT_SIZE) |
| SetupTypedArray (global.NAME, NAMEConstructor, ELEMENT_SIZE); |
| endmacro |
| |
| TYPED_ARRAYS(SETUP_TYPED_ARRAY) |
| |
| // --------------------------- DataView ----------------------------- |
| |
| var $DataView = global.DataView; |
| |
| function DataViewConstructor(buffer, byteOffset, byteLength) { // length = 3 |
| if (%_IsConstructCall()) { |
| if (!IS_ARRAYBUFFER(buffer)) { |
| throw MakeTypeError('data_view_not_array_buffer', []); |
| } |
| var bufferByteLength = buffer.byteLength; |
| var offset = IS_UNDEFINED(byteOffset) ? |
| 0 : ToPositiveInteger(byteOffset, 'invalid_data_view_offset'); |
| if (offset > bufferByteLength) { |
| throw MakeRangeError('invalid_data_view_offset'); |
| } |
| var length = IS_UNDEFINED(byteLength) ? |
| bufferByteLength - offset : TO_INTEGER(byteLength); |
| if (length < 0 || offset + length > bufferByteLength) { |
| throw new MakeRangeError('invalid_data_view_length'); |
| } |
| %DataViewInitialize(this, buffer, offset, length); |
| } else { |
| throw MakeTypeError('constructor_not_function', ["DataView"]); |
| } |
| } |
| |
| function DataViewGetBuffer() { |
| if (!IS_DATAVIEW(this)) { |
| throw MakeTypeError('incompatible_method_receiver', |
| ['DataView.buffer', this]); |
| } |
| return %DataViewGetBuffer(this); |
| } |
| |
| function DataViewGetByteOffset() { |
| if (!IS_DATAVIEW(this)) { |
| throw MakeTypeError('incompatible_method_receiver', |
| ['DataView.byteOffset', this]); |
| } |
| return %DataViewGetByteOffset(this); |
| } |
| |
| function DataViewGetByteLength() { |
| if (!IS_DATAVIEW(this)) { |
| throw MakeTypeError('incompatible_method_receiver', |
| ['DataView.byteLength', this]); |
| } |
| return %DataViewGetByteLength(this); |
| } |
| |
| macro DATA_VIEW_TYPES(FUNCTION) |
| FUNCTION(Int8) |
| FUNCTION(Uint8) |
| FUNCTION(Int16) |
| FUNCTION(Uint16) |
| FUNCTION(Int32) |
| FUNCTION(Uint32) |
| FUNCTION(Float32) |
| FUNCTION(Float64) |
| endmacro |
| |
| function ToPositiveDataViewOffset(offset) { |
| return ToPositiveInteger(offset, 'invalid_data_view_accessor_offset'); |
| } |
| |
| |
| macro DATA_VIEW_GETTER_SETTER(TYPENAME) |
| function DataViewGetTYPENAME(offset, little_endian) { |
| if (!IS_DATAVIEW(this)) { |
| throw MakeTypeError('incompatible_method_receiver', |
| ['DataView.getTYPENAME', this]); |
| } |
| if (%_ArgumentsLength() < 1) { |
| throw MakeTypeError('invalid_argument'); |
| } |
| return %DataViewGetTYPENAME(this, |
| ToPositiveDataViewOffset(offset), |
| !!little_endian); |
| } |
| |
| function DataViewSetTYPENAME(offset, value, little_endian) { |
| if (!IS_DATAVIEW(this)) { |
| throw MakeTypeError('incompatible_method_receiver', |
| ['DataView.setTYPENAME', this]); |
| } |
| if (%_ArgumentsLength() < 2) { |
| throw MakeTypeError('invalid_argument'); |
| } |
| %DataViewSetTYPENAME(this, |
| ToPositiveDataViewOffset(offset), |
| TO_NUMBER_INLINE(value), |
| !!little_endian); |
| } |
| endmacro |
| |
| DATA_VIEW_TYPES(DATA_VIEW_GETTER_SETTER) |
| |
| function SetupDataView() { |
| %CheckIsBootstrapping(); |
| |
| // Setup the DataView constructor. |
| %SetCode($DataView, DataViewConstructor); |
| %FunctionSetPrototype($DataView, new $Object); |
| |
| // Set up constructor property on the DataView prototype. |
| %SetProperty($DataView.prototype, "constructor", $DataView, DONT_ENUM); |
| |
| InstallGetter($DataView.prototype, "buffer", DataViewGetBuffer); |
| InstallGetter($DataView.prototype, "byteOffset", DataViewGetByteOffset); |
| InstallGetter($DataView.prototype, "byteLength", DataViewGetByteLength); |
| |
| InstallFunctions($DataView.prototype, DONT_ENUM, $Array( |
| "getInt8", DataViewGetInt8, |
| "setInt8", DataViewSetInt8, |
| |
| "getUint8", DataViewGetUint8, |
| "setUint8", DataViewSetUint8, |
| |
| "getInt16", DataViewGetInt16, |
| "setInt16", DataViewSetInt16, |
| |
| "getUint16", DataViewGetUint16, |
| "setUint16", DataViewSetUint16, |
| |
| "getInt32", DataViewGetInt32, |
| "setInt32", DataViewSetInt32, |
| |
| "getUint32", DataViewGetUint32, |
| "setUint32", DataViewSetUint32, |
| |
| "getFloat32", DataViewGetFloat32, |
| "setFloat32", DataViewSetFloat32, |
| |
| "getFloat64", DataViewGetFloat64, |
| "setFloat64", DataViewSetFloat64 |
| )); |
| } |
| |
| SetupDataView(); |