diff options
Diffstat (limited to 'node_modules/core-js/internals/array-buffer.js')
| -rw-r--r-- | node_modules/core-js/internals/array-buffer.js | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/node_modules/core-js/internals/array-buffer.js b/node_modules/core-js/internals/array-buffer.js new file mode 100644 index 0000000..d8eb5d5 --- /dev/null +++ b/node_modules/core-js/internals/array-buffer.js @@ -0,0 +1,226 @@ +'use strict'; +var global = require('../internals/global'); +var DESCRIPTORS = require('../internals/descriptors'); +var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native'); +var createNonEnumerableProperty = require('../internals/create-non-enumerable-property'); +var redefineAll = require('../internals/redefine-all'); +var fails = require('../internals/fails'); +var anInstance = require('../internals/an-instance'); +var toInteger = require('../internals/to-integer'); +var toLength = require('../internals/to-length'); +var toIndex = require('../internals/to-index'); +var IEEE754 = require('../internals/ieee754'); +var getPrototypeOf = require('../internals/object-get-prototype-of'); +var setPrototypeOf = require('../internals/object-set-prototype-of'); +var getOwnPropertyNames = require('../internals/object-get-own-property-names').f; +var defineProperty = require('../internals/object-define-property').f; +var arrayFill = require('../internals/array-fill'); +var setToStringTag = require('../internals/set-to-string-tag'); +var InternalStateModule = require('../internals/internal-state'); + +var getInternalState = InternalStateModule.get; +var setInternalState = InternalStateModule.set; +var ARRAY_BUFFER = 'ArrayBuffer'; +var DATA_VIEW = 'DataView'; +var PROTOTYPE = 'prototype'; +var WRONG_LENGTH = 'Wrong length'; +var WRONG_INDEX = 'Wrong index'; +var NativeArrayBuffer = global[ARRAY_BUFFER]; +var $ArrayBuffer = NativeArrayBuffer; +var $DataView = global[DATA_VIEW]; +var $DataViewPrototype = $DataView && $DataView[PROTOTYPE]; +var ObjectPrototype = Object.prototype; +var RangeError = global.RangeError; + +var packIEEE754 = IEEE754.pack; +var unpackIEEE754 = IEEE754.unpack; + +var packInt8 = function (number) { + return [number & 0xFF]; +}; + +var packInt16 = function (number) { + return [number & 0xFF, number >> 8 & 0xFF]; +}; + +var packInt32 = function (number) { + return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF]; +}; + +var unpackInt32 = function (buffer) { + return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0]; +}; + +var packFloat32 = function (number) { + return packIEEE754(number, 23, 4); +}; + +var packFloat64 = function (number) { + return packIEEE754(number, 52, 8); +}; + +var addGetter = function (Constructor, key) { + defineProperty(Constructor[PROTOTYPE], key, { get: function () { return getInternalState(this)[key]; } }); +}; + +var get = function (view, count, index, isLittleEndian) { + var intIndex = toIndex(index); + var store = getInternalState(view); + if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX); + var bytes = getInternalState(store.buffer).bytes; + var start = intIndex + store.byteOffset; + var pack = bytes.slice(start, start + count); + return isLittleEndian ? pack : pack.reverse(); +}; + +var set = function (view, count, index, conversion, value, isLittleEndian) { + var intIndex = toIndex(index); + var store = getInternalState(view); + if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX); + var bytes = getInternalState(store.buffer).bytes; + var start = intIndex + store.byteOffset; + var pack = conversion(+value); + for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1]; +}; + +if (!NATIVE_ARRAY_BUFFER) { + $ArrayBuffer = function ArrayBuffer(length) { + anInstance(this, $ArrayBuffer, ARRAY_BUFFER); + var byteLength = toIndex(length); + setInternalState(this, { + bytes: arrayFill.call(new Array(byteLength), 0), + byteLength: byteLength + }); + if (!DESCRIPTORS) this.byteLength = byteLength; + }; + + $DataView = function DataView(buffer, byteOffset, byteLength) { + anInstance(this, $DataView, DATA_VIEW); + anInstance(buffer, $ArrayBuffer, DATA_VIEW); + var bufferLength = getInternalState(buffer).byteLength; + var offset = toInteger(byteOffset); + if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset'); + byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength); + if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH); + setInternalState(this, { + buffer: buffer, + byteLength: byteLength, + byteOffset: offset + }); + if (!DESCRIPTORS) { + this.buffer = buffer; + this.byteLength = byteLength; + this.byteOffset = offset; + } + }; + + if (DESCRIPTORS) { + addGetter($ArrayBuffer, 'byteLength'); + addGetter($DataView, 'buffer'); + addGetter($DataView, 'byteLength'); + addGetter($DataView, 'byteOffset'); + } + + redefineAll($DataView[PROTOTYPE], { + getInt8: function getInt8(byteOffset) { + return get(this, 1, byteOffset)[0] << 24 >> 24; + }, + getUint8: function getUint8(byteOffset) { + return get(this, 1, byteOffset)[0]; + }, + getInt16: function getInt16(byteOffset /* , littleEndian */) { + var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined); + return (bytes[1] << 8 | bytes[0]) << 16 >> 16; + }, + getUint16: function getUint16(byteOffset /* , littleEndian */) { + var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined); + return bytes[1] << 8 | bytes[0]; + }, + getInt32: function getInt32(byteOffset /* , littleEndian */) { + return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)); + }, + getUint32: function getUint32(byteOffset /* , littleEndian */) { + return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0; + }, + getFloat32: function getFloat32(byteOffset /* , littleEndian */) { + return unpackIEEE754(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23); + }, + getFloat64: function getFloat64(byteOffset /* , littleEndian */) { + return unpackIEEE754(get(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52); + }, + setInt8: function setInt8(byteOffset, value) { + set(this, 1, byteOffset, packInt8, value); + }, + setUint8: function setUint8(byteOffset, value) { + set(this, 1, byteOffset, packInt8, value); + }, + setInt16: function setInt16(byteOffset, value /* , littleEndian */) { + set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined); + }, + setUint16: function setUint16(byteOffset, value /* , littleEndian */) { + set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined); + }, + setInt32: function setInt32(byteOffset, value /* , littleEndian */) { + set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined); + }, + setUint32: function setUint32(byteOffset, value /* , littleEndian */) { + set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined); + }, + setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) { + set(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined); + }, + setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) { + set(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined); + } + }); +} else { + if (!fails(function () { + NativeArrayBuffer(1); + }) || !fails(function () { + new NativeArrayBuffer(-1); // eslint-disable-line no-new + }) || fails(function () { + new NativeArrayBuffer(); // eslint-disable-line no-new + new NativeArrayBuffer(1.5); // eslint-disable-line no-new + new NativeArrayBuffer(NaN); // eslint-disable-line no-new + return NativeArrayBuffer.name != ARRAY_BUFFER; + })) { + $ArrayBuffer = function ArrayBuffer(length) { + anInstance(this, $ArrayBuffer); + return new NativeArrayBuffer(toIndex(length)); + }; + var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer[PROTOTYPE]; + for (var keys = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys.length > j;) { + if (!((key = keys[j++]) in $ArrayBuffer)) { + createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]); + } + } + ArrayBufferPrototype.constructor = $ArrayBuffer; + } + + // WebKit bug - the same parent prototype for typed arrays and data view + if (setPrototypeOf && getPrototypeOf($DataViewPrototype) !== ObjectPrototype) { + setPrototypeOf($DataViewPrototype, ObjectPrototype); + } + + // iOS Safari 7.x bug + var testView = new $DataView(new $ArrayBuffer(2)); + var nativeSetInt8 = $DataViewPrototype.setInt8; + testView.setInt8(0, 2147483648); + testView.setInt8(1, 2147483649); + if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, { + setInt8: function setInt8(byteOffset, value) { + nativeSetInt8.call(this, byteOffset, value << 24 >> 24); + }, + setUint8: function setUint8(byteOffset, value) { + nativeSetInt8.call(this, byteOffset, value << 24 >> 24); + } + }, { unsafe: true }); +} + +setToStringTag($ArrayBuffer, ARRAY_BUFFER); +setToStringTag($DataView, DATA_VIEW); + +module.exports = { + ArrayBuffer: $ArrayBuffer, + DataView: $DataView +}; |