--- /dev/null
+'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 {
+ /* eslint-disable no-new -- required for testing */
+ if (!fails(function () {
+ NativeArrayBuffer(1);
+ }) || !fails(function () {
+ new NativeArrayBuffer(-1);
+ }) || fails(function () {
+ new NativeArrayBuffer();
+ new NativeArrayBuffer(1.5);
+ new NativeArrayBuffer(NaN);
+ return NativeArrayBuffer.name != ARRAY_BUFFER;
+ })) {
+ /* eslint-enable no-new -- required for testing */
+ $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
+};
projects / dotfiles / .git / blobdiff