1 | 'use strict';
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2 | var global = require('../internals/global');
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3 | var uncurryThis = require('../internals/function-uncurry-this');
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4 | var DESCRIPTORS = require('../internals/descriptors');
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5 | var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-basic-detection');
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6 | var FunctionName = require('../internals/function-name');
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7 | var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
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8 | var defineBuiltInAccessor = require('../internals/define-built-in-accessor');
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9 | var defineBuiltIns = require('../internals/define-built-ins');
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10 | var fails = require('../internals/fails');
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11 | var anInstance = require('../internals/an-instance');
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12 | var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
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13 | var toLength = require('../internals/to-length');
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14 | var toIndex = require('../internals/to-index');
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15 | var fround = require('../internals/math-fround');
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16 | var IEEE754 = require('../internals/ieee754');
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17 | var getPrototypeOf = require('../internals/object-get-prototype-of');
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18 | var setPrototypeOf = require('../internals/object-set-prototype-of');
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19 | var arrayFill = require('../internals/array-fill');
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20 | var arraySlice = require('../internals/array-slice');
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21 | var inheritIfRequired = require('../internals/inherit-if-required');
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22 | var copyConstructorProperties = require('../internals/copy-constructor-properties');
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23 | var setToStringTag = require('../internals/set-to-string-tag');
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24 | var InternalStateModule = require('../internals/internal-state');
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25 |
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26 | var PROPER_FUNCTION_NAME = FunctionName.PROPER;
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27 | var CONFIGURABLE_FUNCTION_NAME = FunctionName.CONFIGURABLE;
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28 | var ARRAY_BUFFER = 'ArrayBuffer';
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29 | var DATA_VIEW = 'DataView';
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30 | var PROTOTYPE = 'prototype';
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31 | var WRONG_LENGTH = 'Wrong length';
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32 | var WRONG_INDEX = 'Wrong index';
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33 | var getInternalArrayBufferState = InternalStateModule.getterFor(ARRAY_BUFFER);
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34 | var getInternalDataViewState = InternalStateModule.getterFor(DATA_VIEW);
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35 | var setInternalState = InternalStateModule.set;
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36 | var NativeArrayBuffer = global[ARRAY_BUFFER];
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37 | var $ArrayBuffer = NativeArrayBuffer;
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38 | var ArrayBufferPrototype = $ArrayBuffer && $ArrayBuffer[PROTOTYPE];
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39 | var $DataView = global[DATA_VIEW];
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40 | var DataViewPrototype = $DataView && $DataView[PROTOTYPE];
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41 | var ObjectPrototype = Object.prototype;
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42 | var Array = global.Array;
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43 | var RangeError = global.RangeError;
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44 | var fill = uncurryThis(arrayFill);
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45 | var reverse = uncurryThis([].reverse);
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46 |
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47 | var packIEEE754 = IEEE754.pack;
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48 | var unpackIEEE754 = IEEE754.unpack;
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49 |
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50 | var packInt8 = function (number) {
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51 | return [number & 0xFF];
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52 | };
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53 |
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54 | var packInt16 = function (number) {
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55 | return [number & 0xFF, number >> 8 & 0xFF];
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56 | };
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57 |
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58 | var packInt32 = function (number) {
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59 | return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
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60 | };
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61 |
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62 | var unpackInt32 = function (buffer) {
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63 | return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
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64 | };
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65 |
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66 | var packFloat32 = function (number) {
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67 | return packIEEE754(fround(number), 23, 4);
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68 | };
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69 |
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70 | var packFloat64 = function (number) {
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71 | return packIEEE754(number, 52, 8);
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72 | };
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73 |
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74 | var addGetter = function (Constructor, key, getInternalState) {
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75 | defineBuiltInAccessor(Constructor[PROTOTYPE], key, {
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76 | configurable: true,
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77 | get: function () {
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78 | return getInternalState(this)[key];
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79 | }
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80 | });
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81 | };
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82 |
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83 | var get = function (view, count, index, isLittleEndian) {
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84 | var store = getInternalDataViewState(view);
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85 | var intIndex = toIndex(index);
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86 | var boolIsLittleEndian = !!isLittleEndian;
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87 | if (intIndex + count > store.byteLength) throw new RangeError(WRONG_INDEX);
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88 | var bytes = store.bytes;
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89 | var start = intIndex + store.byteOffset;
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90 | var pack = arraySlice(bytes, start, start + count);
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91 | return boolIsLittleEndian ? pack : reverse(pack);
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92 | };
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93 |
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94 | var set = function (view, count, index, conversion, value, isLittleEndian) {
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95 | var store = getInternalDataViewState(view);
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96 | var intIndex = toIndex(index);
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97 | var pack = conversion(+value);
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98 | var boolIsLittleEndian = !!isLittleEndian;
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99 | if (intIndex + count > store.byteLength) throw new RangeError(WRONG_INDEX);
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100 | var bytes = store.bytes;
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101 | var start = intIndex + store.byteOffset;
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102 | for (var i = 0; i < count; i++) bytes[start + i] = pack[boolIsLittleEndian ? i : count - i - 1];
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103 | };
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104 |
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105 | if (!NATIVE_ARRAY_BUFFER) {
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106 | $ArrayBuffer = function ArrayBuffer(length) {
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107 | anInstance(this, ArrayBufferPrototype);
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108 | var byteLength = toIndex(length);
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109 | setInternalState(this, {
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110 | type: ARRAY_BUFFER,
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111 | bytes: fill(Array(byteLength), 0),
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112 | byteLength: byteLength
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113 | });
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114 | if (!DESCRIPTORS) {
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115 | this.byteLength = byteLength;
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116 | this.detached = false;
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117 | }
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118 | };
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119 |
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120 | ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE];
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121 |
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122 | $DataView = function DataView(buffer, byteOffset, byteLength) {
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123 | anInstance(this, DataViewPrototype);
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124 | anInstance(buffer, ArrayBufferPrototype);
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125 | var bufferState = getInternalArrayBufferState(buffer);
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126 | var bufferLength = bufferState.byteLength;
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127 | var offset = toIntegerOrInfinity(byteOffset);
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128 | if (offset < 0 || offset > bufferLength) throw new RangeError('Wrong offset');
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129 | byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
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130 | if (offset + byteLength > bufferLength) throw new RangeError(WRONG_LENGTH);
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131 | setInternalState(this, {
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132 | type: DATA_VIEW,
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133 | buffer: buffer,
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134 | byteLength: byteLength,
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135 | byteOffset: offset,
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136 | bytes: bufferState.bytes
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137 | });
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138 | if (!DESCRIPTORS) {
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139 | this.buffer = buffer;
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140 | this.byteLength = byteLength;
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141 | this.byteOffset = offset;
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142 | }
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143 | };
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144 |
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145 | DataViewPrototype = $DataView[PROTOTYPE];
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146 |
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147 | if (DESCRIPTORS) {
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148 | addGetter($ArrayBuffer, 'byteLength', getInternalArrayBufferState);
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149 | addGetter($DataView, 'buffer', getInternalDataViewState);
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150 | addGetter($DataView, 'byteLength', getInternalDataViewState);
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151 | addGetter($DataView, 'byteOffset', getInternalDataViewState);
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152 | }
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153 |
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154 | defineBuiltIns(DataViewPrototype, {
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155 | getInt8: function getInt8(byteOffset) {
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156 | return get(this, 1, byteOffset)[0] << 24 >> 24;
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157 | },
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158 | getUint8: function getUint8(byteOffset) {
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159 | return get(this, 1, byteOffset)[0];
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160 | },
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161 | getInt16: function getInt16(byteOffset /* , littleEndian */) {
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162 | var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : false);
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163 | return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
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164 | },
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165 | getUint16: function getUint16(byteOffset /* , littleEndian */) {
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166 | var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : false);
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167 | return bytes[1] << 8 | bytes[0];
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168 | },
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169 | getInt32: function getInt32(byteOffset /* , littleEndian */) {
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170 | return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : false));
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171 | },
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172 | getUint32: function getUint32(byteOffset /* , littleEndian */) {
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173 | return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : false)) >>> 0;
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174 | },
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175 | getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
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176 | return unpackIEEE754(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : false), 23);
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177 | },
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178 | getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
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179 | return unpackIEEE754(get(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : false), 52);
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180 | },
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181 | setInt8: function setInt8(byteOffset, value) {
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182 | set(this, 1, byteOffset, packInt8, value);
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183 | },
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184 | setUint8: function setUint8(byteOffset, value) {
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185 | set(this, 1, byteOffset, packInt8, value);
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186 | },
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187 | setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
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188 | set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : false);
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189 | },
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190 | setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
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191 | set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : false);
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192 | },
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193 | setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
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194 | set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : false);
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195 | },
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196 | setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
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197 | set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : false);
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198 | },
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199 | setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
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200 | set(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : false);
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201 | },
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202 | setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
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203 | set(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : false);
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204 | }
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205 | });
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206 | } else {
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207 | var INCORRECT_ARRAY_BUFFER_NAME = PROPER_FUNCTION_NAME && NativeArrayBuffer.name !== ARRAY_BUFFER;
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208 |
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209 | if (!fails(function () {
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210 | NativeArrayBuffer(1);
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211 | }) || !fails(function () {
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212 | new NativeArrayBuffer(-1);
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213 | }) || fails(function () {
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214 | new NativeArrayBuffer();
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215 | new NativeArrayBuffer(1.5);
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216 | new NativeArrayBuffer(NaN);
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217 | return NativeArrayBuffer.length !== 1 || INCORRECT_ARRAY_BUFFER_NAME && !CONFIGURABLE_FUNCTION_NAME;
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218 | })) {
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219 |
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220 | $ArrayBuffer = function ArrayBuffer(length) {
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221 | anInstance(this, ArrayBufferPrototype);
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222 | return inheritIfRequired(new NativeArrayBuffer(toIndex(length)), this, $ArrayBuffer);
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223 | };
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224 |
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225 | $ArrayBuffer[PROTOTYPE] = ArrayBufferPrototype;
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226 |
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227 | ArrayBufferPrototype.constructor = $ArrayBuffer;
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228 |
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229 | copyConstructorProperties($ArrayBuffer, NativeArrayBuffer);
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230 | } else if (INCORRECT_ARRAY_BUFFER_NAME && CONFIGURABLE_FUNCTION_NAME) {
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231 | createNonEnumerableProperty(NativeArrayBuffer, 'name', ARRAY_BUFFER);
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232 | }
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233 |
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234 |
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235 | if (setPrototypeOf && getPrototypeOf(DataViewPrototype) !== ObjectPrototype) {
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236 | setPrototypeOf(DataViewPrototype, ObjectPrototype);
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237 | }
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238 |
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239 |
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240 | var testView = new $DataView(new $ArrayBuffer(2));
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241 | var $setInt8 = uncurryThis(DataViewPrototype.setInt8);
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242 | testView.setInt8(0, 2147483648);
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243 | testView.setInt8(1, 2147483649);
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244 | if (testView.getInt8(0) || !testView.getInt8(1)) defineBuiltIns(DataViewPrototype, {
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245 | setInt8: function setInt8(byteOffset, value) {
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246 | $setInt8(this, byteOffset, value << 24 >> 24);
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247 | },
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248 | setUint8: function setUint8(byteOffset, value) {
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249 | $setInt8(this, byteOffset, value << 24 >> 24);
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250 | }
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251 | }, { unsafe: true });
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252 | }
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253 |
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254 | setToStringTag($ArrayBuffer, ARRAY_BUFFER);
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255 | setToStringTag($DataView, DATA_VIEW);
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256 |
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257 | module.exports = {
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258 | ArrayBuffer: $ArrayBuffer,
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259 | DataView: $DataView
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260 | };
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