111 lines
9.1 KiB
JavaScript
111 lines
9.1 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }(); /**
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* Copyright (c) 2017-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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exports.default = function (realm) {
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// ECMA262 24.2.2.1
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var func = new _index2.NativeFunctionValue(realm, "DataView", "DataView", 3, function (context, _ref, argCount, NewTarget) {
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var _ref2 = _slicedToArray(_ref, 3),
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buffer = _ref2[0],
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byteOffset = _ref2[1],
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byteLength = _ref2[2];
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// 1. If NewTarget is undefined, throw a TypeError exception.
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if (!NewTarget) {
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throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
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}
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buffer = buffer.throwIfNotConcrete();
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// 2. If Type(buffer) is not Object, throw a TypeError exception.
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if (!(buffer instanceof _index2.ObjectValue)) {
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throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
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}
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// 3. If buffer does not have an [[ArrayBufferData]] internal slot, throw a TypeError exception.
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if (!("$ArrayBufferData" in buffer)) {
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throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
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}
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// 4. Let offset be ? ToIndex(byteOffset).
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var offset = _singletons.To.ToIndexPartial(realm, byteOffset);
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// 5. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.
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if ((0, _index.IsDetachedBuffer)(realm, buffer)) {
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throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
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}
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// 6. Let bufferByteLength be the value of buffer's [[ArrayBufferByteLength]] internal slot.
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var bufferByteLength = buffer.$ArrayBufferByteLength;
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(0, _invariant2.default)(typeof bufferByteLength === "number");
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// 7. If offset > bufferByteLength, throw a RangeError exception.
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if (offset > bufferByteLength) {
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throw realm.createErrorThrowCompletion(realm.intrinsics.RangeError);
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}
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// 8. If byteLength is undefined, then
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var viewByteLength = void 0;
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if (!byteLength || byteLength instanceof _index2.UndefinedValue) {
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// a. Let viewByteLength be bufferByteLength - offset.
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viewByteLength = bufferByteLength - offset;
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} else {
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// 9. Else,
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// a. Let viewByteLength be ? ToIndex(byteLength).
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viewByteLength = _singletons.To.ToIndexPartial(realm, byteLength);
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// b. If offset+viewByteLength > bufferByteLength, throw a RangeError exception.
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if (offset + viewByteLength > bufferByteLength) {
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throw realm.createErrorThrowCompletion(realm.intrinsics.RangeError);
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}
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}
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// 10. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%DataViewPrototype%", « [[DataView]], [[ViewedArrayBuffer]], [[ByteLength]], [[ByteOffset]] »).
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var O = _singletons.Create.OrdinaryCreateFromConstructor(realm, NewTarget, "DataViewPrototype", {
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$DataView: undefined,
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$ViewedArrayBuffer: undefined,
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$ByteLength: undefined,
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$ByteOffset: undefined
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});
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// 11. Set O's [[DataView]] internal slot to true.
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O.$DataView = true;
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// 12. Set O's [[ViewedArrayBuffer]] internal slot to buffer.
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O.$ViewedArrayBuffer = buffer;
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// 13. Set O's [[ByteLength]] internal slot to viewByteLength.
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O.$ByteLength = viewByteLength;
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// 14. Set O's [[ByteOffset]] internal slot to offset.
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O.$ByteOffset = offset;
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// 15. Return O.
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return O;
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});
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return func;
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};
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var _index = require("../../methods/index.js");
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var _index2 = require("../../values/index.js");
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var _singletons = require("../../singletons.js");
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var _invariant = require("../../invariant.js");
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var _invariant2 = _interopRequireDefault(_invariant);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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//# sourceMappingURL=DataView.js.map
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