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- 'use strict';
- var global = require('./_global');
- var DESCRIPTORS = require('./_descriptors');
- var LIBRARY = require('./_library');
- var $typed = require('./_typed');
- var hide = require('./_hide');
- var redefineAll = require('./_redefine-all');
- var fails = require('./_fails');
- var anInstance = require('./_an-instance');
- var toInteger = require('./_to-integer');
- var toLength = require('./_to-length');
- var toIndex = require('./_to-index');
- var gOPN = require('./_object-gopn').f;
- var dP = require('./_object-dp').f;
- var arrayFill = require('./_array-fill');
- var setToStringTag = require('./_set-to-string-tag');
- var ARRAY_BUFFER = 'ArrayBuffer';
- var DATA_VIEW = 'DataView';
- var PROTOTYPE = 'prototype';
- var WRONG_LENGTH = 'Wrong length!';
- var WRONG_INDEX = 'Wrong index!';
- var $ArrayBuffer = global[ARRAY_BUFFER];
- var $DataView = global[DATA_VIEW];
- var Math = global.Math;
- var RangeError = global.RangeError;
- // eslint-disable-next-line no-shadow-restricted-names
- var Infinity = global.Infinity;
- var BaseBuffer = $ArrayBuffer;
- var abs = Math.abs;
- var pow = Math.pow;
- var floor = Math.floor;
- var log = Math.log;
- var LN2 = Math.LN2;
- var BUFFER = 'buffer';
- var BYTE_LENGTH = 'byteLength';
- var BYTE_OFFSET = 'byteOffset';
- var $BUFFER = DESCRIPTORS ? '_b' : BUFFER;
- var $LENGTH = DESCRIPTORS ? '_l' : BYTE_LENGTH;
- var $OFFSET = DESCRIPTORS ? '_o' : BYTE_OFFSET;
- // IEEE754 conversions based on https://github.com/feross/ieee754
- function packIEEE754(value, mLen, nBytes) {
- var buffer = new Array(nBytes);
- var eLen = nBytes * 8 - mLen - 1;
- var eMax = (1 << eLen) - 1;
- var eBias = eMax >> 1;
- var rt = mLen === 23 ? pow(2, -24) - pow(2, -77) : 0;
- var i = 0;
- var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
- var e, m, c;
- value = abs(value);
- // eslint-disable-next-line no-self-compare
- if (value != value || value === Infinity) {
- // eslint-disable-next-line no-self-compare
- m = value != value ? 1 : 0;
- e = eMax;
- } else {
- e = floor(log(value) / LN2);
- if (value * (c = pow(2, -e)) < 1) {
- e--;
- c *= 2;
- }
- if (e + eBias >= 1) {
- value += rt / c;
- } else {
- value += rt * pow(2, 1 - eBias);
- }
- if (value * c >= 2) {
- e++;
- c /= 2;
- }
- if (e + eBias >= eMax) {
- m = 0;
- e = eMax;
- } else if (e + eBias >= 1) {
- m = (value * c - 1) * pow(2, mLen);
- e = e + eBias;
- } else {
- m = value * pow(2, eBias - 1) * pow(2, mLen);
- e = 0;
- }
- }
- for (; mLen >= 8; buffer[i++] = m & 255, m /= 256, mLen -= 8);
- e = e << mLen | m;
- eLen += mLen;
- for (; eLen > 0; buffer[i++] = e & 255, e /= 256, eLen -= 8);
- buffer[--i] |= s * 128;
- return buffer;
- }
- function unpackIEEE754(buffer, mLen, nBytes) {
- var eLen = nBytes * 8 - mLen - 1;
- var eMax = (1 << eLen) - 1;
- var eBias = eMax >> 1;
- var nBits = eLen - 7;
- var i = nBytes - 1;
- var s = buffer[i--];
- var e = s & 127;
- var m;
- s >>= 7;
- for (; nBits > 0; e = e * 256 + buffer[i], i--, nBits -= 8);
- m = e & (1 << -nBits) - 1;
- e >>= -nBits;
- nBits += mLen;
- for (; nBits > 0; m = m * 256 + buffer[i], i--, nBits -= 8);
- if (e === 0) {
- e = 1 - eBias;
- } else if (e === eMax) {
- return m ? NaN : s ? -Infinity : Infinity;
- } else {
- m = m + pow(2, mLen);
- e = e - eBias;
- } return (s ? -1 : 1) * m * pow(2, e - mLen);
- }
- function unpackI32(bytes) {
- return bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
- }
- function packI8(it) {
- return [it & 0xff];
- }
- function packI16(it) {
- return [it & 0xff, it >> 8 & 0xff];
- }
- function packI32(it) {
- return [it & 0xff, it >> 8 & 0xff, it >> 16 & 0xff, it >> 24 & 0xff];
- }
- function packF64(it) {
- return packIEEE754(it, 52, 8);
- }
- function packF32(it) {
- return packIEEE754(it, 23, 4);
- }
- function addGetter(C, key, internal) {
- dP(C[PROTOTYPE], key, { get: function () { return this[internal]; } });
- }
- function get(view, bytes, index, isLittleEndian) {
- var numIndex = +index;
- var intIndex = toIndex(numIndex);
- if (intIndex + bytes > view[$LENGTH]) throw RangeError(WRONG_INDEX);
- var store = view[$BUFFER]._b;
- var start = intIndex + view[$OFFSET];
- var pack = store.slice(start, start + bytes);
- return isLittleEndian ? pack : pack.reverse();
- }
- function set(view, bytes, index, conversion, value, isLittleEndian) {
- var numIndex = +index;
- var intIndex = toIndex(numIndex);
- if (intIndex + bytes > view[$LENGTH]) throw RangeError(WRONG_INDEX);
- var store = view[$BUFFER]._b;
- var start = intIndex + view[$OFFSET];
- var pack = conversion(+value);
- for (var i = 0; i < bytes; i++) store[start + i] = pack[isLittleEndian ? i : bytes - i - 1];
- }
- if (!$typed.ABV) {
- $ArrayBuffer = function ArrayBuffer(length) {
- anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
- var byteLength = toIndex(length);
- this._b = arrayFill.call(new Array(byteLength), 0);
- this[$LENGTH] = byteLength;
- };
- $DataView = function DataView(buffer, byteOffset, byteLength) {
- anInstance(this, $DataView, DATA_VIEW);
- anInstance(buffer, $ArrayBuffer, DATA_VIEW);
- var bufferLength = buffer[$LENGTH];
- 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);
- this[$BUFFER] = buffer;
- this[$OFFSET] = offset;
- this[$LENGTH] = byteLength;
- };
- if (DESCRIPTORS) {
- addGetter($ArrayBuffer, BYTE_LENGTH, '_l');
- addGetter($DataView, BUFFER, '_b');
- addGetter($DataView, BYTE_LENGTH, '_l');
- addGetter($DataView, BYTE_OFFSET, '_o');
- }
- redefineAll($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[1]);
- return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
- },
- getUint16: function getUint16(byteOffset /* , littleEndian */) {
- var bytes = get(this, 2, byteOffset, arguments[1]);
- return bytes[1] << 8 | bytes[0];
- },
- getInt32: function getInt32(byteOffset /* , littleEndian */) {
- return unpackI32(get(this, 4, byteOffset, arguments[1]));
- },
- getUint32: function getUint32(byteOffset /* , littleEndian */) {
- return unpackI32(get(this, 4, byteOffset, arguments[1])) >>> 0;
- },
- getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
- return unpackIEEE754(get(this, 4, byteOffset, arguments[1]), 23, 4);
- },
- getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
- return unpackIEEE754(get(this, 8, byteOffset, arguments[1]), 52, 8);
- },
- setInt8: function setInt8(byteOffset, value) {
- set(this, 1, byteOffset, packI8, value);
- },
- setUint8: function setUint8(byteOffset, value) {
- set(this, 1, byteOffset, packI8, value);
- },
- setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
- set(this, 2, byteOffset, packI16, value, arguments[2]);
- },
- setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
- set(this, 2, byteOffset, packI16, value, arguments[2]);
- },
- setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
- set(this, 4, byteOffset, packI32, value, arguments[2]);
- },
- setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
- set(this, 4, byteOffset, packI32, value, arguments[2]);
- },
- setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
- set(this, 4, byteOffset, packF32, value, arguments[2]);
- },
- setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
- set(this, 8, byteOffset, packF64, value, arguments[2]);
- }
- });
- } else {
- if (!fails(function () {
- $ArrayBuffer(1);
- }) || !fails(function () {
- new $ArrayBuffer(-1); // eslint-disable-line no-new
- }) || fails(function () {
- new $ArrayBuffer(); // eslint-disable-line no-new
- new $ArrayBuffer(1.5); // eslint-disable-line no-new
- new $ArrayBuffer(NaN); // eslint-disable-line no-new
- return $ArrayBuffer.name != ARRAY_BUFFER;
- })) {
- $ArrayBuffer = function ArrayBuffer(length) {
- anInstance(this, $ArrayBuffer);
- return new BaseBuffer(toIndex(length));
- };
- var ArrayBufferProto = $ArrayBuffer[PROTOTYPE] = BaseBuffer[PROTOTYPE];
- for (var keys = gOPN(BaseBuffer), j = 0, key; keys.length > j;) {
- if (!((key = keys[j++]) in $ArrayBuffer)) hide($ArrayBuffer, key, BaseBuffer[key]);
- }
- if (!LIBRARY) ArrayBufferProto.constructor = $ArrayBuffer;
- }
- // iOS Safari 7.x bug
- var view = new $DataView(new $ArrayBuffer(2));
- var $setInt8 = $DataView[PROTOTYPE].setInt8;
- view.setInt8(0, 2147483648);
- view.setInt8(1, 2147483649);
- if (view.getInt8(0) || !view.getInt8(1)) redefineAll($DataView[PROTOTYPE], {
- setInt8: function setInt8(byteOffset, value) {
- $setInt8.call(this, byteOffset, value << 24 >> 24);
- },
- setUint8: function setUint8(byteOffset, value) {
- $setInt8.call(this, byteOffset, value << 24 >> 24);
- }
- }, true);
- }
- setToStringTag($ArrayBuffer, ARRAY_BUFFER);
- setToStringTag($DataView, DATA_VIEW);
- hide($DataView[PROTOTYPE], $typed.VIEW, true);
- exports[ARRAY_BUFFER] = $ArrayBuffer;
- exports[DATA_VIEW] = $DataView;
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