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7 |
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8 |
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9 | 'use strict'
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10 |
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11 | const base64 = require('base64-js')
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12 | const ieee754 = require('ieee754')
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13 | const customInspectSymbol =
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14 | (typeof Symbol === 'function' && typeof Symbol['for'] === 'function')
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15 | ? Symbol['for']('nodejs.util.inspect.custom')
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16 | : null
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17 |
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18 | exports.Buffer = Buffer
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19 | exports.SlowBuffer = SlowBuffer
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20 | exports.INSPECT_MAX_BYTES = 50
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21 |
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22 | const K_MAX_LENGTH = 0x7fffffff
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23 | exports.kMaxLength = K_MAX_LENGTH
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24 |
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25 |
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26 |
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27 |
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28 |
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29 |
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30 |
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31 |
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32 |
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33 |
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34 |
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35 |
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36 |
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37 |
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38 |
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39 | Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
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40 |
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41 | if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
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42 | typeof console.error === 'function') {
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43 | console.error(
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44 | 'This browser lacks typed array (Uint8Array) support which is required by ' +
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45 | '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
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46 | )
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47 | }
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48 |
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49 | function typedArraySupport () {
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50 |
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51 | try {
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52 | const arr = new Uint8Array(1)
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53 | const proto = { foo: function () { return 42 } }
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54 | Object.setPrototypeOf(proto, Uint8Array.prototype)
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55 | Object.setPrototypeOf(arr, proto)
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56 | return arr.foo() === 42
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57 | } catch (e) {
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58 | return false
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59 | }
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60 | }
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61 |
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62 | Object.defineProperty(Buffer.prototype, 'parent', {
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63 | enumerable: true,
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64 | get: function () {
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65 | if (!Buffer.isBuffer(this)) return undefined
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66 | return this.buffer
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67 | }
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68 | })
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69 |
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70 | Object.defineProperty(Buffer.prototype, 'offset', {
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71 | enumerable: true,
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72 | get: function () {
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73 | if (!Buffer.isBuffer(this)) return undefined
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74 | return this.byteOffset
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75 | }
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76 | })
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77 |
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78 | function createBuffer (length) {
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79 | if (length > K_MAX_LENGTH) {
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80 | throw new RangeError('The value "' + length + '" is invalid for option "size"')
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81 | }
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82 |
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83 | const buf = new Uint8Array(length)
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84 | Object.setPrototypeOf(buf, Buffer.prototype)
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85 | return buf
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86 | }
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87 |
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88 |
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89 |
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90 |
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91 |
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92 |
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93 |
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94 |
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95 |
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96 |
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97 |
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98 | function Buffer (arg, encodingOrOffset, length) {
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99 |
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100 | if (typeof arg === 'number') {
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101 | if (typeof encodingOrOffset === 'string') {
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102 | throw new TypeError(
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103 | 'The "string" argument must be of type string. Received type number'
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104 | )
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105 | }
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106 | return allocUnsafe(arg)
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107 | }
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108 | return from(arg, encodingOrOffset, length)
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109 | }
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110 |
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111 | Buffer.poolSize = 8192
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112 |
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113 | function from (value, encodingOrOffset, length) {
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114 | if (typeof value === 'string') {
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115 | return fromString(value, encodingOrOffset)
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116 | }
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117 |
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118 | if (ArrayBuffer.isView(value)) {
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119 | return fromArrayView(value)
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120 | }
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121 |
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122 | if (value == null) {
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123 | throw new TypeError(
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124 | 'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
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125 | 'or Array-like Object. Received type ' + (typeof value)
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126 | )
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127 | }
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128 |
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129 | if (isInstance(value, ArrayBuffer) ||
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130 | (value && isInstance(value.buffer, ArrayBuffer))) {
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131 | return fromArrayBuffer(value, encodingOrOffset, length)
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132 | }
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133 |
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134 | if (typeof SharedArrayBuffer !== 'undefined' &&
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135 | (isInstance(value, SharedArrayBuffer) ||
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136 | (value && isInstance(value.buffer, SharedArrayBuffer)))) {
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137 | return fromArrayBuffer(value, encodingOrOffset, length)
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138 | }
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139 |
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140 | if (typeof value === 'number') {
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141 | throw new TypeError(
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142 | 'The "value" argument must not be of type number. Received type number'
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143 | )
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144 | }
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145 |
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146 | const valueOf = value.valueOf && value.valueOf()
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147 | if (valueOf != null && valueOf !== value) {
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148 | return Buffer.from(valueOf, encodingOrOffset, length)
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149 | }
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150 |
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151 | const b = fromObject(value)
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152 | if (b) return b
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153 |
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154 | if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
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155 | typeof value[Symbol.toPrimitive] === 'function') {
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156 | return Buffer.from(value[Symbol.toPrimitive]('string'), encodingOrOffset, length)
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157 | }
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158 |
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159 | throw new TypeError(
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160 | 'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
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161 | 'or Array-like Object. Received type ' + (typeof value)
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162 | )
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163 | }
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164 |
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165 |
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166 |
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167 |
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168 |
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169 |
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170 |
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171 |
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172 |
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173 | Buffer.from = function (value, encodingOrOffset, length) {
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174 | return from(value, encodingOrOffset, length)
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175 | }
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176 |
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177 |
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178 |
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179 | Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype)
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180 | Object.setPrototypeOf(Buffer, Uint8Array)
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181 |
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182 | function assertSize (size) {
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183 | if (typeof size !== 'number') {
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184 | throw new TypeError('"size" argument must be of type number')
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185 | } else if (size < 0) {
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186 | throw new RangeError('The value "' + size + '" is invalid for option "size"')
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187 | }
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188 | }
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189 |
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190 | function alloc (size, fill, encoding) {
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191 | assertSize(size)
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192 | if (size <= 0) {
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193 | return createBuffer(size)
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194 | }
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195 | if (fill !== undefined) {
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196 |
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197 |
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198 |
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199 | return typeof encoding === 'string'
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200 | ? createBuffer(size).fill(fill, encoding)
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201 | : createBuffer(size).fill(fill)
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202 | }
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203 | return createBuffer(size)
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204 | }
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205 |
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206 |
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207 |
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208 |
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209 |
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210 | Buffer.alloc = function (size, fill, encoding) {
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211 | return alloc(size, fill, encoding)
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212 | }
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213 |
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214 | function allocUnsafe (size) {
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215 | assertSize(size)
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216 | return createBuffer(size < 0 ? 0 : checked(size) | 0)
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217 | }
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218 |
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219 |
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220 |
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221 |
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222 | Buffer.allocUnsafe = function (size) {
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223 | return allocUnsafe(size)
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224 | }
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225 |
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226 |
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227 |
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228 | Buffer.allocUnsafeSlow = function (size) {
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229 | return allocUnsafe(size)
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230 | }
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231 |
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232 | function fromString (string, encoding) {
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233 | if (typeof encoding !== 'string' || encoding === '') {
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234 | encoding = 'utf8'
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235 | }
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236 |
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237 | if (!Buffer.isEncoding(encoding)) {
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238 | throw new TypeError('Unknown encoding: ' + encoding)
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239 | }
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240 |
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241 | const length = byteLength(string, encoding) | 0
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242 | let buf = createBuffer(length)
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243 |
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244 | const actual = buf.write(string, encoding)
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245 |
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246 | if (actual !== length) {
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247 |
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248 |
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249 |
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250 | buf = buf.slice(0, actual)
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251 | }
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252 |
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253 | return buf
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254 | }
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255 |
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256 | function fromArrayLike (array) {
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257 | const length = array.length < 0 ? 0 : checked(array.length) | 0
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258 | const buf = createBuffer(length)
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259 | for (let i = 0; i < length; i += 1) {
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260 | buf[i] = array[i] & 255
|
261 | }
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262 | return buf
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263 | }
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264 |
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265 | function fromArrayView (arrayView) {
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266 | if (isInstance(arrayView, Uint8Array)) {
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267 | const copy = new Uint8Array(arrayView)
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268 | return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength)
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269 | }
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270 | return fromArrayLike(arrayView)
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271 | }
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272 |
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273 | function fromArrayBuffer (array, byteOffset, length) {
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274 | if (byteOffset < 0 || array.byteLength < byteOffset) {
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275 | throw new RangeError('"offset" is outside of buffer bounds')
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276 | }
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277 |
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278 | if (array.byteLength < byteOffset + (length || 0)) {
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279 | throw new RangeError('"length" is outside of buffer bounds')
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280 | }
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281 |
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282 | let buf
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283 | if (byteOffset === undefined && length === undefined) {
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284 | buf = new Uint8Array(array)
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285 | } else if (length === undefined) {
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286 | buf = new Uint8Array(array, byteOffset)
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287 | } else {
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288 | buf = new Uint8Array(array, byteOffset, length)
|
289 | }
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290 |
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291 |
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292 | Object.setPrototypeOf(buf, Buffer.prototype)
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293 |
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294 | return buf
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295 | }
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296 |
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297 | function fromObject (obj) {
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298 | if (Buffer.isBuffer(obj)) {
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299 | const len = checked(obj.length) | 0
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300 | const buf = createBuffer(len)
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301 |
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302 | if (buf.length === 0) {
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303 | return buf
|
304 | }
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305 |
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306 | obj.copy(buf, 0, 0, len)
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307 | return buf
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308 | }
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309 |
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310 | if (obj.length !== undefined) {
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311 | if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
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312 | return createBuffer(0)
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313 | }
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314 | return fromArrayLike(obj)
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315 | }
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316 |
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317 | if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
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318 | return fromArrayLike(obj.data)
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319 | }
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320 | }
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321 |
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322 | function checked (length) {
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323 |
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324 |
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325 | if (length >= K_MAX_LENGTH) {
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326 | throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
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327 | 'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
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328 | }
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329 | return length | 0
|
330 | }
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331 |
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332 | function SlowBuffer (length) {
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333 | if (+length != length) {
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334 | length = 0
|
335 | }
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336 | return Buffer.alloc(+length)
|
337 | }
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338 |
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339 | Buffer.isBuffer = function isBuffer (b) {
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340 | return b != null && b._isBuffer === true &&
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341 | b !== Buffer.prototype
|
342 | }
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343 |
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344 | Buffer.compare = function compare (a, b) {
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345 | if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
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346 | if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
|
347 | if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
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348 | throw new TypeError(
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349 | 'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
|
350 | )
|
351 | }
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352 |
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353 | if (a === b) return 0
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354 |
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355 | let x = a.length
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356 | let y = b.length
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357 |
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358 | for (let i = 0, len = Math.min(x, y); i < len; ++i) {
|
359 | if (a[i] !== b[i]) {
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360 | x = a[i]
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361 | y = b[i]
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362 | break
|
363 | }
|
364 | }
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365 |
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366 | if (x < y) return -1
|
367 | if (y < x) return 1
|
368 | return 0
|
369 | }
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370 |
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371 | Buffer.isEncoding = function isEncoding (encoding) {
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372 | switch (String(encoding).toLowerCase()) {
|
373 | case 'hex':
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374 | case 'utf8':
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375 | case 'utf-8':
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376 | case 'ascii':
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377 | case 'latin1':
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378 | case 'binary':
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379 | case 'base64':
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380 | case 'ucs2':
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381 | case 'ucs-2':
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382 | case 'utf16le':
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383 | case 'utf-16le':
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384 | return true
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385 | default:
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386 | return false
|
387 | }
|
388 | }
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389 |
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390 | Buffer.concat = function concat (list, length) {
|
391 | if (!Array.isArray(list)) {
|
392 | throw new TypeError('"list" argument must be an Array of Buffers')
|
393 | }
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394 |
|
395 | if (list.length === 0) {
|
396 | return Buffer.alloc(0)
|
397 | }
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398 |
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399 | let i
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400 | if (length === undefined) {
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401 | length = 0
|
402 | for (i = 0; i < list.length; ++i) {
|
403 | length += list[i].length
|
404 | }
|
405 | }
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406 |
|
407 | const buffer = Buffer.allocUnsafe(length)
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408 | let pos = 0
|
409 | for (i = 0; i < list.length; ++i) {
|
410 | let buf = list[i]
|
411 | if (isInstance(buf, Uint8Array)) {
|
412 | if (pos + buf.length > buffer.length) {
|
413 | if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf)
|
414 | buf.copy(buffer, pos)
|
415 | } else {
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416 | Uint8Array.prototype.set.call(
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417 | buffer,
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418 | buf,
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419 | pos
|
420 | )
|
421 | }
|
422 | } else if (!Buffer.isBuffer(buf)) {
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423 | throw new TypeError('"list" argument must be an Array of Buffers')
|
424 | } else {
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425 | buf.copy(buffer, pos)
|
426 | }
|
427 | pos += buf.length
|
428 | }
|
429 | return buffer
|
430 | }
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431 |
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432 | function byteLength (string, encoding) {
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433 | if (Buffer.isBuffer(string)) {
|
434 | return string.length
|
435 | }
|
436 | if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
|
437 | return string.byteLength
|
438 | }
|
439 | if (typeof string !== 'string') {
|
440 | throw new TypeError(
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441 | 'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
|
442 | 'Received type ' + typeof string
|
443 | )
|
444 | }
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445 |
|
446 | const len = string.length
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447 | const mustMatch = (arguments.length > 2 && arguments[2] === true)
|
448 | if (!mustMatch && len === 0) return 0
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449 |
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450 |
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451 | let loweredCase = false
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452 | for (;;) {
|
453 | switch (encoding) {
|
454 | case 'ascii':
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455 | case 'latin1':
|
456 | case 'binary':
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457 | return len
|
458 | case 'utf8':
|
459 | case 'utf-8':
|
460 | return utf8ToBytes(string).length
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461 | case 'ucs2':
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462 | case 'ucs-2':
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463 | case 'utf16le':
|
464 | case 'utf-16le':
|
465 | return len * 2
|
466 | case 'hex':
|
467 | return len >>> 1
|
468 | case 'base64':
|
469 | return base64ToBytes(string).length
|
470 | default:
|
471 | if (loweredCase) {
|
472 | return mustMatch ? -1 : utf8ToBytes(string).length
|
473 | }
|
474 | encoding = ('' + encoding).toLowerCase()
|
475 | loweredCase = true
|
476 | }
|
477 | }
|
478 | }
|
479 | Buffer.byteLength = byteLength
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480 |
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481 | function slowToString (encoding, start, end) {
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482 | let loweredCase = false
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483 |
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484 |
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485 |
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486 |
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487 |
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488 |
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489 |
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490 |
|
491 | if (start === undefined || start < 0) {
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492 | start = 0
|
493 | }
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494 |
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495 |
|
496 | if (start > this.length) {
|
497 | return ''
|
498 | }
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499 |
|
500 | if (end === undefined || end > this.length) {
|
501 | end = this.length
|
502 | }
|
503 |
|
504 | if (end <= 0) {
|
505 | return ''
|
506 | }
|
507 |
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508 |
|
509 | end >>>= 0
|
510 | start >>>= 0
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511 |
|
512 | if (end <= start) {
|
513 | return ''
|
514 | }
|
515 |
|
516 | if (!encoding) encoding = 'utf8'
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517 |
|
518 | while (true) {
|
519 | switch (encoding) {
|
520 | case 'hex':
|
521 | return hexSlice(this, start, end)
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522 |
|
523 | case 'utf8':
|
524 | case 'utf-8':
|
525 | return utf8Slice(this, start, end)
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526 |
|
527 | case 'ascii':
|
528 | return asciiSlice(this, start, end)
|
529 |
|
530 | case 'latin1':
|
531 | case 'binary':
|
532 | return latin1Slice(this, start, end)
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533 |
|
534 | case 'base64':
|
535 | return base64Slice(this, start, end)
|
536 |
|
537 | case 'ucs2':
|
538 | case 'ucs-2':
|
539 | case 'utf16le':
|
540 | case 'utf-16le':
|
541 | return utf16leSlice(this, start, end)
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542 |
|
543 | default:
|
544 | if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
|
545 | encoding = (encoding + '').toLowerCase()
|
546 | loweredCase = true
|
547 | }
|
548 | }
|
549 | }
|
550 |
|
551 |
|
552 |
|
553 |
|
554 |
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555 |
|
556 |
|
557 | Buffer.prototype._isBuffer = true
|
558 |
|
559 | function swap (b, n, m) {
|
560 | const i = b[n]
|
561 | b[n] = b[m]
|
562 | b[m] = i
|
563 | }
|
564 |
|
565 | Buffer.prototype.swap16 = function swap16 () {
|
566 | const len = this.length
|
567 | if (len % 2 !== 0) {
|
568 | throw new RangeError('Buffer size must be a multiple of 16-bits')
|
569 | }
|
570 | for (let i = 0; i < len; i += 2) {
|
571 | swap(this, i, i + 1)
|
572 | }
|
573 | return this
|
574 | }
|
575 |
|
576 | Buffer.prototype.swap32 = function swap32 () {
|
577 | const len = this.length
|
578 | if (len % 4 !== 0) {
|
579 | throw new RangeError('Buffer size must be a multiple of 32-bits')
|
580 | }
|
581 | for (let i = 0; i < len; i += 4) {
|
582 | swap(this, i, i + 3)
|
583 | swap(this, i + 1, i + 2)
|
584 | }
|
585 | return this
|
586 | }
|
587 |
|
588 | Buffer.prototype.swap64 = function swap64 () {
|
589 | const len = this.length
|
590 | if (len % 8 !== 0) {
|
591 | throw new RangeError('Buffer size must be a multiple of 64-bits')
|
592 | }
|
593 | for (let i = 0; i < len; i += 8) {
|
594 | swap(this, i, i + 7)
|
595 | swap(this, i + 1, i + 6)
|
596 | swap(this, i + 2, i + 5)
|
597 | swap(this, i + 3, i + 4)
|
598 | }
|
599 | return this
|
600 | }
|
601 |
|
602 | Buffer.prototype.toString = function toString () {
|
603 | const length = this.length
|
604 | if (length === 0) return ''
|
605 | if (arguments.length === 0) return utf8Slice(this, 0, length)
|
606 | return slowToString.apply(this, arguments)
|
607 | }
|
608 |
|
609 | Buffer.prototype.toLocaleString = Buffer.prototype.toString
|
610 |
|
611 | Buffer.prototype.equals = function equals (b) {
|
612 | if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
|
613 | if (this === b) return true
|
614 | return Buffer.compare(this, b) === 0
|
615 | }
|
616 |
|
617 | Buffer.prototype.inspect = function inspect () {
|
618 | let str = ''
|
619 | const max = exports.INSPECT_MAX_BYTES
|
620 | str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
|
621 | if (this.length > max) str += ' ... '
|
622 | return '<Buffer ' + str + '>'
|
623 | }
|
624 | if (customInspectSymbol) {
|
625 | Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect
|
626 | }
|
627 |
|
628 | Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
|
629 | if (isInstance(target, Uint8Array)) {
|
630 | target = Buffer.from(target, target.offset, target.byteLength)
|
631 | }
|
632 | if (!Buffer.isBuffer(target)) {
|
633 | throw new TypeError(
|
634 | 'The "target" argument must be one of type Buffer or Uint8Array. ' +
|
635 | 'Received type ' + (typeof target)
|
636 | )
|
637 | }
|
638 |
|
639 | if (start === undefined) {
|
640 | start = 0
|
641 | }
|
642 | if (end === undefined) {
|
643 | end = target ? target.length : 0
|
644 | }
|
645 | if (thisStart === undefined) {
|
646 | thisStart = 0
|
647 | }
|
648 | if (thisEnd === undefined) {
|
649 | thisEnd = this.length
|
650 | }
|
651 |
|
652 | if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
|
653 | throw new RangeError('out of range index')
|
654 | }
|
655 |
|
656 | if (thisStart >= thisEnd && start >= end) {
|
657 | return 0
|
658 | }
|
659 | if (thisStart >= thisEnd) {
|
660 | return -1
|
661 | }
|
662 | if (start >= end) {
|
663 | return 1
|
664 | }
|
665 |
|
666 | start >>>= 0
|
667 | end >>>= 0
|
668 | thisStart >>>= 0
|
669 | thisEnd >>>= 0
|
670 |
|
671 | if (this === target) return 0
|
672 |
|
673 | let x = thisEnd - thisStart
|
674 | let y = end - start
|
675 | const len = Math.min(x, y)
|
676 |
|
677 | const thisCopy = this.slice(thisStart, thisEnd)
|
678 | const targetCopy = target.slice(start, end)
|
679 |
|
680 | for (let i = 0; i < len; ++i) {
|
681 | if (thisCopy[i] !== targetCopy[i]) {
|
682 | x = thisCopy[i]
|
683 | y = targetCopy[i]
|
684 | break
|
685 | }
|
686 | }
|
687 |
|
688 | if (x < y) return -1
|
689 | if (y < x) return 1
|
690 | return 0
|
691 | }
|
692 |
|
693 |
|
694 |
|
695 |
|
696 |
|
697 |
|
698 |
|
699 |
|
700 |
|
701 |
|
702 | function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
|
703 |
|
704 | if (buffer.length === 0) return -1
|
705 |
|
706 |
|
707 | if (typeof byteOffset === 'string') {
|
708 | encoding = byteOffset
|
709 | byteOffset = 0
|
710 | } else if (byteOffset > 0x7fffffff) {
|
711 | byteOffset = 0x7fffffff
|
712 | } else if (byteOffset < -0x80000000) {
|
713 | byteOffset = -0x80000000
|
714 | }
|
715 | byteOffset = +byteOffset
|
716 | if (numberIsNaN(byteOffset)) {
|
717 |
|
718 | byteOffset = dir ? 0 : (buffer.length - 1)
|
719 | }
|
720 |
|
721 |
|
722 | if (byteOffset < 0) byteOffset = buffer.length + byteOffset
|
723 | if (byteOffset >= buffer.length) {
|
724 | if (dir) return -1
|
725 | else byteOffset = buffer.length - 1
|
726 | } else if (byteOffset < 0) {
|
727 | if (dir) byteOffset = 0
|
728 | else return -1
|
729 | }
|
730 |
|
731 |
|
732 | if (typeof val === 'string') {
|
733 | val = Buffer.from(val, encoding)
|
734 | }
|
735 |
|
736 |
|
737 | if (Buffer.isBuffer(val)) {
|
738 |
|
739 | if (val.length === 0) {
|
740 | return -1
|
741 | }
|
742 | return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
|
743 | } else if (typeof val === 'number') {
|
744 | val = val & 0xFF
|
745 | if (typeof Uint8Array.prototype.indexOf === 'function') {
|
746 | if (dir) {
|
747 | return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
|
748 | } else {
|
749 | return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
|
750 | }
|
751 | }
|
752 | return arrayIndexOf(buffer, [val], byteOffset, encoding, dir)
|
753 | }
|
754 |
|
755 | throw new TypeError('val must be string, number or Buffer')
|
756 | }
|
757 |
|
758 | function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
|
759 | let indexSize = 1
|
760 | let arrLength = arr.length
|
761 | let valLength = val.length
|
762 |
|
763 | if (encoding !== undefined) {
|
764 | encoding = String(encoding).toLowerCase()
|
765 | if (encoding === 'ucs2' || encoding === 'ucs-2' ||
|
766 | encoding === 'utf16le' || encoding === 'utf-16le') {
|
767 | if (arr.length < 2 || val.length < 2) {
|
768 | return -1
|
769 | }
|
770 | indexSize = 2
|
771 | arrLength /= 2
|
772 | valLength /= 2
|
773 | byteOffset /= 2
|
774 | }
|
775 | }
|
776 |
|
777 | function read (buf, i) {
|
778 | if (indexSize === 1) {
|
779 | return buf[i]
|
780 | } else {
|
781 | return buf.readUInt16BE(i * indexSize)
|
782 | }
|
783 | }
|
784 |
|
785 | let i
|
786 | if (dir) {
|
787 | let foundIndex = -1
|
788 | for (i = byteOffset; i < arrLength; i++) {
|
789 | if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
|
790 | if (foundIndex === -1) foundIndex = i
|
791 | if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
|
792 | } else {
|
793 | if (foundIndex !== -1) i -= i - foundIndex
|
794 | foundIndex = -1
|
795 | }
|
796 | }
|
797 | } else {
|
798 | if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
|
799 | for (i = byteOffset; i >= 0; i--) {
|
800 | let found = true
|
801 | for (let j = 0; j < valLength; j++) {
|
802 | if (read(arr, i + j) !== read(val, j)) {
|
803 | found = false
|
804 | break
|
805 | }
|
806 | }
|
807 | if (found) return i
|
808 | }
|
809 | }
|
810 |
|
811 | return -1
|
812 | }
|
813 |
|
814 | Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
|
815 | return this.indexOf(val, byteOffset, encoding) !== -1
|
816 | }
|
817 |
|
818 | Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
|
819 | return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
|
820 | }
|
821 |
|
822 | Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
|
823 | return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
|
824 | }
|
825 |
|
826 | function hexWrite (buf, string, offset, length) {
|
827 | offset = Number(offset) || 0
|
828 | const remaining = buf.length - offset
|
829 | if (!length) {
|
830 | length = remaining
|
831 | } else {
|
832 | length = Number(length)
|
833 | if (length > remaining) {
|
834 | length = remaining
|
835 | }
|
836 | }
|
837 |
|
838 | const strLen = string.length
|
839 |
|
840 | if (length > strLen / 2) {
|
841 | length = strLen / 2
|
842 | }
|
843 | let i
|
844 | for (i = 0; i < length; ++i) {
|
845 | const parsed = parseInt(string.substr(i * 2, 2), 16)
|
846 | if (numberIsNaN(parsed)) return i
|
847 | buf[offset + i] = parsed
|
848 | }
|
849 | return i
|
850 | }
|
851 |
|
852 | function utf8Write (buf, string, offset, length) {
|
853 | return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
|
854 | }
|
855 |
|
856 | function asciiWrite (buf, string, offset, length) {
|
857 | return blitBuffer(asciiToBytes(string), buf, offset, length)
|
858 | }
|
859 |
|
860 | function base64Write (buf, string, offset, length) {
|
861 | return blitBuffer(base64ToBytes(string), buf, offset, length)
|
862 | }
|
863 |
|
864 | function ucs2Write (buf, string, offset, length) {
|
865 | return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
|
866 | }
|
867 |
|
868 | Buffer.prototype.write = function write (string, offset, length, encoding) {
|
869 |
|
870 | if (offset === undefined) {
|
871 | encoding = 'utf8'
|
872 | length = this.length
|
873 | offset = 0
|
874 |
|
875 | } else if (length === undefined && typeof offset === 'string') {
|
876 | encoding = offset
|
877 | length = this.length
|
878 | offset = 0
|
879 |
|
880 | } else if (isFinite(offset)) {
|
881 | offset = offset >>> 0
|
882 | if (isFinite(length)) {
|
883 | length = length >>> 0
|
884 | if (encoding === undefined) encoding = 'utf8'
|
885 | } else {
|
886 | encoding = length
|
887 | length = undefined
|
888 | }
|
889 | } else {
|
890 | throw new Error(
|
891 | 'Buffer.write(string, encoding, offset[, length]) is no longer supported'
|
892 | )
|
893 | }
|
894 |
|
895 | const remaining = this.length - offset
|
896 | if (length === undefined || length > remaining) length = remaining
|
897 |
|
898 | if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
|
899 | throw new RangeError('Attempt to write outside buffer bounds')
|
900 | }
|
901 |
|
902 | if (!encoding) encoding = 'utf8'
|
903 |
|
904 | let loweredCase = false
|
905 | for (;;) {
|
906 | switch (encoding) {
|
907 | case 'hex':
|
908 | return hexWrite(this, string, offset, length)
|
909 |
|
910 | case 'utf8':
|
911 | case 'utf-8':
|
912 | return utf8Write(this, string, offset, length)
|
913 |
|
914 | case 'ascii':
|
915 | case 'latin1':
|
916 | case 'binary':
|
917 | return asciiWrite(this, string, offset, length)
|
918 |
|
919 | case 'base64':
|
920 |
|
921 | return base64Write(this, string, offset, length)
|
922 |
|
923 | case 'ucs2':
|
924 | case 'ucs-2':
|
925 | case 'utf16le':
|
926 | case 'utf-16le':
|
927 | return ucs2Write(this, string, offset, length)
|
928 |
|
929 | default:
|
930 | if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
|
931 | encoding = ('' + encoding).toLowerCase()
|
932 | loweredCase = true
|
933 | }
|
934 | }
|
935 | }
|
936 |
|
937 | Buffer.prototype.toJSON = function toJSON () {
|
938 | return {
|
939 | type: 'Buffer',
|
940 | data: Array.prototype.slice.call(this._arr || this, 0)
|
941 | }
|
942 | }
|
943 |
|
944 | function base64Slice (buf, start, end) {
|
945 | if (start === 0 && end === buf.length) {
|
946 | return base64.fromByteArray(buf)
|
947 | } else {
|
948 | return base64.fromByteArray(buf.slice(start, end))
|
949 | }
|
950 | }
|
951 |
|
952 | function utf8Slice (buf, start, end) {
|
953 | end = Math.min(buf.length, end)
|
954 | const res = []
|
955 |
|
956 | let i = start
|
957 | while (i < end) {
|
958 | const firstByte = buf[i]
|
959 | let codePoint = null
|
960 | let bytesPerSequence = (firstByte > 0xEF)
|
961 | ? 4
|
962 | : (firstByte > 0xDF)
|
963 | ? 3
|
964 | : (firstByte > 0xBF)
|
965 | ? 2
|
966 | : 1
|
967 |
|
968 | if (i + bytesPerSequence <= end) {
|
969 | let secondByte, thirdByte, fourthByte, tempCodePoint
|
970 |
|
971 | switch (bytesPerSequence) {
|
972 | case 1:
|
973 | if (firstByte < 0x80) {
|
974 | codePoint = firstByte
|
975 | }
|
976 | break
|
977 | case 2:
|
978 | secondByte = buf[i + 1]
|
979 | if ((secondByte & 0xC0) === 0x80) {
|
980 | tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
|
981 | if (tempCodePoint > 0x7F) {
|
982 | codePoint = tempCodePoint
|
983 | }
|
984 | }
|
985 | break
|
986 | case 3:
|
987 | secondByte = buf[i + 1]
|
988 | thirdByte = buf[i + 2]
|
989 | if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
|
990 | tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
|
991 | if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
|
992 | codePoint = tempCodePoint
|
993 | }
|
994 | }
|
995 | break
|
996 | case 4:
|
997 | secondByte = buf[i + 1]
|
998 | thirdByte = buf[i + 2]
|
999 | fourthByte = buf[i + 3]
|
1000 | if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
|
1001 | tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
|
1002 | if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
|
1003 | codePoint = tempCodePoint
|
1004 | }
|
1005 | }
|
1006 | }
|
1007 | }
|
1008 |
|
1009 | if (codePoint === null) {
|
1010 |
|
1011 |
|
1012 | codePoint = 0xFFFD
|
1013 | bytesPerSequence = 1
|
1014 | } else if (codePoint > 0xFFFF) {
|
1015 |
|
1016 | codePoint -= 0x10000
|
1017 | res.push(codePoint >>> 10 & 0x3FF | 0xD800)
|
1018 | codePoint = 0xDC00 | codePoint & 0x3FF
|
1019 | }
|
1020 |
|
1021 | res.push(codePoint)
|
1022 | i += bytesPerSequence
|
1023 | }
|
1024 |
|
1025 | return decodeCodePointsArray(res)
|
1026 | }
|
1027 |
|
1028 |
|
1029 |
|
1030 |
|
1031 | const MAX_ARGUMENTS_LENGTH = 0x1000
|
1032 |
|
1033 | function decodeCodePointsArray (codePoints) {
|
1034 | const len = codePoints.length
|
1035 | if (len <= MAX_ARGUMENTS_LENGTH) {
|
1036 | return String.fromCharCode.apply(String, codePoints)
|
1037 | }
|
1038 |
|
1039 |
|
1040 | let res = ''
|
1041 | let i = 0
|
1042 | while (i < len) {
|
1043 | res += String.fromCharCode.apply(
|
1044 | String,
|
1045 | codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
|
1046 | )
|
1047 | }
|
1048 | return res
|
1049 | }
|
1050 |
|
1051 | function asciiSlice (buf, start, end) {
|
1052 | let ret = ''
|
1053 | end = Math.min(buf.length, end)
|
1054 |
|
1055 | for (let i = start; i < end; ++i) {
|
1056 | ret += String.fromCharCode(buf[i] & 0x7F)
|
1057 | }
|
1058 | return ret
|
1059 | }
|
1060 |
|
1061 | function latin1Slice (buf, start, end) {
|
1062 | let ret = ''
|
1063 | end = Math.min(buf.length, end)
|
1064 |
|
1065 | for (let i = start; i < end; ++i) {
|
1066 | ret += String.fromCharCode(buf[i])
|
1067 | }
|
1068 | return ret
|
1069 | }
|
1070 |
|
1071 | function hexSlice (buf, start, end) {
|
1072 | const len = buf.length
|
1073 |
|
1074 | if (!start || start < 0) start = 0
|
1075 | if (!end || end < 0 || end > len) end = len
|
1076 |
|
1077 | let out = ''
|
1078 | for (let i = start; i < end; ++i) {
|
1079 | out += hexSliceLookupTable[buf[i]]
|
1080 | }
|
1081 | return out
|
1082 | }
|
1083 |
|
1084 | function utf16leSlice (buf, start, end) {
|
1085 | const bytes = buf.slice(start, end)
|
1086 | let res = ''
|
1087 |
|
1088 | for (let i = 0; i < bytes.length - 1; i += 2) {
|
1089 | res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
|
1090 | }
|
1091 | return res
|
1092 | }
|
1093 |
|
1094 | Buffer.prototype.slice = function slice (start, end) {
|
1095 | const len = this.length
|
1096 | start = ~~start
|
1097 | end = end === undefined ? len : ~~end
|
1098 |
|
1099 | if (start < 0) {
|
1100 | start += len
|
1101 | if (start < 0) start = 0
|
1102 | } else if (start > len) {
|
1103 | start = len
|
1104 | }
|
1105 |
|
1106 | if (end < 0) {
|
1107 | end += len
|
1108 | if (end < 0) end = 0
|
1109 | } else if (end > len) {
|
1110 | end = len
|
1111 | }
|
1112 |
|
1113 | if (end < start) end = start
|
1114 |
|
1115 | const newBuf = this.subarray(start, end)
|
1116 |
|
1117 | Object.setPrototypeOf(newBuf, Buffer.prototype)
|
1118 |
|
1119 | return newBuf
|
1120 | }
|
1121 |
|
1122 |
|
1123 |
|
1124 |
|
1125 | function checkOffset (offset, ext, length) {
|
1126 | if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
|
1127 | if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
|
1128 | }
|
1129 |
|
1130 | Buffer.prototype.readUintLE =
|
1131 | Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
|
1132 | offset = offset >>> 0
|
1133 | byteLength = byteLength >>> 0
|
1134 | if (!noAssert) checkOffset(offset, byteLength, this.length)
|
1135 |
|
1136 | let val = this[offset]
|
1137 | let mul = 1
|
1138 | let i = 0
|
1139 | while (++i < byteLength && (mul *= 0x100)) {
|
1140 | val += this[offset + i] * mul
|
1141 | }
|
1142 |
|
1143 | return val
|
1144 | }
|
1145 |
|
1146 | Buffer.prototype.readUintBE =
|
1147 | Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
|
1148 | offset = offset >>> 0
|
1149 | byteLength = byteLength >>> 0
|
1150 | if (!noAssert) {
|
1151 | checkOffset(offset, byteLength, this.length)
|
1152 | }
|
1153 |
|
1154 | let val = this[offset + --byteLength]
|
1155 | let mul = 1
|
1156 | while (byteLength > 0 && (mul *= 0x100)) {
|
1157 | val += this[offset + --byteLength] * mul
|
1158 | }
|
1159 |
|
1160 | return val
|
1161 | }
|
1162 |
|
1163 | Buffer.prototype.readUint8 =
|
1164 | Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
|
1165 | offset = offset >>> 0
|
1166 | if (!noAssert) checkOffset(offset, 1, this.length)
|
1167 | return this[offset]
|
1168 | }
|
1169 |
|
1170 | Buffer.prototype.readUint16LE =
|
1171 | Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
|
1172 | offset = offset >>> 0
|
1173 | if (!noAssert) checkOffset(offset, 2, this.length)
|
1174 | return this[offset] | (this[offset + 1] << 8)
|
1175 | }
|
1176 |
|
1177 | Buffer.prototype.readUint16BE =
|
1178 | Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
|
1179 | offset = offset >>> 0
|
1180 | if (!noAssert) checkOffset(offset, 2, this.length)
|
1181 | return (this[offset] << 8) | this[offset + 1]
|
1182 | }
|
1183 |
|
1184 | Buffer.prototype.readUint32LE =
|
1185 | Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
|
1186 | offset = offset >>> 0
|
1187 | if (!noAssert) checkOffset(offset, 4, this.length)
|
1188 |
|
1189 | return ((this[offset]) |
|
1190 | (this[offset + 1] << 8) |
|
1191 | (this[offset + 2] << 16)) +
|
1192 | (this[offset + 3] * 0x1000000)
|
1193 | }
|
1194 |
|
1195 | Buffer.prototype.readUint32BE =
|
1196 | Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
|
1197 | offset = offset >>> 0
|
1198 | if (!noAssert) checkOffset(offset, 4, this.length)
|
1199 |
|
1200 | return (this[offset] * 0x1000000) +
|
1201 | ((this[offset + 1] << 16) |
|
1202 | (this[offset + 2] << 8) |
|
1203 | this[offset + 3])
|
1204 | }
|
1205 |
|
1206 | Buffer.prototype.readBigUInt64LE = defineBigIntMethod(function readBigUInt64LE (offset) {
|
1207 | offset = offset >>> 0
|
1208 | validateNumber(offset, 'offset')
|
1209 | const first = this[offset]
|
1210 | const last = this[offset + 7]
|
1211 | if (first === undefined || last === undefined) {
|
1212 | boundsError(offset, this.length - 8)
|
1213 | }
|
1214 |
|
1215 | const lo = first +
|
1216 | this[++offset] * 2 ** 8 +
|
1217 | this[++offset] * 2 ** 16 +
|
1218 | this[++offset] * 2 ** 24
|
1219 |
|
1220 | const hi = this[++offset] +
|
1221 | this[++offset] * 2 ** 8 +
|
1222 | this[++offset] * 2 ** 16 +
|
1223 | last * 2 ** 24
|
1224 |
|
1225 | return BigInt(lo) + (BigInt(hi) << BigInt(32))
|
1226 | })
|
1227 |
|
1228 | Buffer.prototype.readBigUInt64BE = defineBigIntMethod(function readBigUInt64BE (offset) {
|
1229 | offset = offset >>> 0
|
1230 | validateNumber(offset, 'offset')
|
1231 | const first = this[offset]
|
1232 | const last = this[offset + 7]
|
1233 | if (first === undefined || last === undefined) {
|
1234 | boundsError(offset, this.length - 8)
|
1235 | }
|
1236 |
|
1237 | const hi = first * 2 ** 24 +
|
1238 | this[++offset] * 2 ** 16 +
|
1239 | this[++offset] * 2 ** 8 +
|
1240 | this[++offset]
|
1241 |
|
1242 | const lo = this[++offset] * 2 ** 24 +
|
1243 | this[++offset] * 2 ** 16 +
|
1244 | this[++offset] * 2 ** 8 +
|
1245 | last
|
1246 |
|
1247 | return (BigInt(hi) << BigInt(32)) + BigInt(lo)
|
1248 | })
|
1249 |
|
1250 | Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
|
1251 | offset = offset >>> 0
|
1252 | byteLength = byteLength >>> 0
|
1253 | if (!noAssert) checkOffset(offset, byteLength, this.length)
|
1254 |
|
1255 | let val = this[offset]
|
1256 | let mul = 1
|
1257 | let i = 0
|
1258 | while (++i < byteLength && (mul *= 0x100)) {
|
1259 | val += this[offset + i] * mul
|
1260 | }
|
1261 | mul *= 0x80
|
1262 |
|
1263 | if (val >= mul) val -= Math.pow(2, 8 * byteLength)
|
1264 |
|
1265 | return val
|
1266 | }
|
1267 |
|
1268 | Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
|
1269 | offset = offset >>> 0
|
1270 | byteLength = byteLength >>> 0
|
1271 | if (!noAssert) checkOffset(offset, byteLength, this.length)
|
1272 |
|
1273 | let i = byteLength
|
1274 | let mul = 1
|
1275 | let val = this[offset + --i]
|
1276 | while (i > 0 && (mul *= 0x100)) {
|
1277 | val += this[offset + --i] * mul
|
1278 | }
|
1279 | mul *= 0x80
|
1280 |
|
1281 | if (val >= mul) val -= Math.pow(2, 8 * byteLength)
|
1282 |
|
1283 | return val
|
1284 | }
|
1285 |
|
1286 | Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
|
1287 | offset = offset >>> 0
|
1288 | if (!noAssert) checkOffset(offset, 1, this.length)
|
1289 | if (!(this[offset] & 0x80)) return (this[offset])
|
1290 | return ((0xff - this[offset] + 1) * -1)
|
1291 | }
|
1292 |
|
1293 | Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
|
1294 | offset = offset >>> 0
|
1295 | if (!noAssert) checkOffset(offset, 2, this.length)
|
1296 | const val = this[offset] | (this[offset + 1] << 8)
|
1297 | return (val & 0x8000) ? val | 0xFFFF0000 : val
|
1298 | }
|
1299 |
|
1300 | Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
|
1301 | offset = offset >>> 0
|
1302 | if (!noAssert) checkOffset(offset, 2, this.length)
|
1303 | const val = this[offset + 1] | (this[offset] << 8)
|
1304 | return (val & 0x8000) ? val | 0xFFFF0000 : val
|
1305 | }
|
1306 |
|
1307 | Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
|
1308 | offset = offset >>> 0
|
1309 | if (!noAssert) checkOffset(offset, 4, this.length)
|
1310 |
|
1311 | return (this[offset]) |
|
1312 | (this[offset + 1] << 8) |
|
1313 | (this[offset + 2] << 16) |
|
1314 | (this[offset + 3] << 24)
|
1315 | }
|
1316 |
|
1317 | Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
|
1318 | offset = offset >>> 0
|
1319 | if (!noAssert) checkOffset(offset, 4, this.length)
|
1320 |
|
1321 | return (this[offset] << 24) |
|
1322 | (this[offset + 1] << 16) |
|
1323 | (this[offset + 2] << 8) |
|
1324 | (this[offset + 3])
|
1325 | }
|
1326 |
|
1327 | Buffer.prototype.readBigInt64LE = defineBigIntMethod(function readBigInt64LE (offset) {
|
1328 | offset = offset >>> 0
|
1329 | validateNumber(offset, 'offset')
|
1330 | const first = this[offset]
|
1331 | const last = this[offset + 7]
|
1332 | if (first === undefined || last === undefined) {
|
1333 | boundsError(offset, this.length - 8)
|
1334 | }
|
1335 |
|
1336 | const val = this[offset + 4] +
|
1337 | this[offset + 5] * 2 ** 8 +
|
1338 | this[offset + 6] * 2 ** 16 +
|
1339 | (last << 24)
|
1340 |
|
1341 | return (BigInt(val) << BigInt(32)) +
|
1342 | BigInt(first +
|
1343 | this[++offset] * 2 ** 8 +
|
1344 | this[++offset] * 2 ** 16 +
|
1345 | this[++offset] * 2 ** 24)
|
1346 | })
|
1347 |
|
1348 | Buffer.prototype.readBigInt64BE = defineBigIntMethod(function readBigInt64BE (offset) {
|
1349 | offset = offset >>> 0
|
1350 | validateNumber(offset, 'offset')
|
1351 | const first = this[offset]
|
1352 | const last = this[offset + 7]
|
1353 | if (first === undefined || last === undefined) {
|
1354 | boundsError(offset, this.length - 8)
|
1355 | }
|
1356 |
|
1357 | const val = (first << 24) +
|
1358 | this[++offset] * 2 ** 16 +
|
1359 | this[++offset] * 2 ** 8 +
|
1360 | this[++offset]
|
1361 |
|
1362 | return (BigInt(val) << BigInt(32)) +
|
1363 | BigInt(this[++offset] * 2 ** 24 +
|
1364 | this[++offset] * 2 ** 16 +
|
1365 | this[++offset] * 2 ** 8 +
|
1366 | last)
|
1367 | })
|
1368 |
|
1369 | Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
|
1370 | offset = offset >>> 0
|
1371 | if (!noAssert) checkOffset(offset, 4, this.length)
|
1372 | return ieee754.read(this, offset, true, 23, 4)
|
1373 | }
|
1374 |
|
1375 | Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
|
1376 | offset = offset >>> 0
|
1377 | if (!noAssert) checkOffset(offset, 4, this.length)
|
1378 | return ieee754.read(this, offset, false, 23, 4)
|
1379 | }
|
1380 |
|
1381 | Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
|
1382 | offset = offset >>> 0
|
1383 | if (!noAssert) checkOffset(offset, 8, this.length)
|
1384 | return ieee754.read(this, offset, true, 52, 8)
|
1385 | }
|
1386 |
|
1387 | Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
|
1388 | offset = offset >>> 0
|
1389 | if (!noAssert) checkOffset(offset, 8, this.length)
|
1390 | return ieee754.read(this, offset, false, 52, 8)
|
1391 | }
|
1392 |
|
1393 | function checkInt (buf, value, offset, ext, max, min) {
|
1394 | if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
|
1395 | if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
|
1396 | if (offset + ext > buf.length) throw new RangeError('Index out of range')
|
1397 | }
|
1398 |
|
1399 | Buffer.prototype.writeUintLE =
|
1400 | Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
|
1401 | value = +value
|
1402 | offset = offset >>> 0
|
1403 | byteLength = byteLength >>> 0
|
1404 | if (!noAssert) {
|
1405 | const maxBytes = Math.pow(2, 8 * byteLength) - 1
|
1406 | checkInt(this, value, offset, byteLength, maxBytes, 0)
|
1407 | }
|
1408 |
|
1409 | let mul = 1
|
1410 | let i = 0
|
1411 | this[offset] = value & 0xFF
|
1412 | while (++i < byteLength && (mul *= 0x100)) {
|
1413 | this[offset + i] = (value / mul) & 0xFF
|
1414 | }
|
1415 |
|
1416 | return offset + byteLength
|
1417 | }
|
1418 |
|
1419 | Buffer.prototype.writeUintBE =
|
1420 | Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
|
1421 | value = +value
|
1422 | offset = offset >>> 0
|
1423 | byteLength = byteLength >>> 0
|
1424 | if (!noAssert) {
|
1425 | const maxBytes = Math.pow(2, 8 * byteLength) - 1
|
1426 | checkInt(this, value, offset, byteLength, maxBytes, 0)
|
1427 | }
|
1428 |
|
1429 | let i = byteLength - 1
|
1430 | let mul = 1
|
1431 | this[offset + i] = value & 0xFF
|
1432 | while (--i >= 0 && (mul *= 0x100)) {
|
1433 | this[offset + i] = (value / mul) & 0xFF
|
1434 | }
|
1435 |
|
1436 | return offset + byteLength
|
1437 | }
|
1438 |
|
1439 | Buffer.prototype.writeUint8 =
|
1440 | Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
|
1441 | value = +value
|
1442 | offset = offset >>> 0
|
1443 | if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
|
1444 | this[offset] = (value & 0xff)
|
1445 | return offset + 1
|
1446 | }
|
1447 |
|
1448 | Buffer.prototype.writeUint16LE =
|
1449 | Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
|
1450 | value = +value
|
1451 | offset = offset >>> 0
|
1452 | if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
|
1453 | this[offset] = (value & 0xff)
|
1454 | this[offset + 1] = (value >>> 8)
|
1455 | return offset + 2
|
1456 | }
|
1457 |
|
1458 | Buffer.prototype.writeUint16BE =
|
1459 | Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
|
1460 | value = +value
|
1461 | offset = offset >>> 0
|
1462 | if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
|
1463 | this[offset] = (value >>> 8)
|
1464 | this[offset + 1] = (value & 0xff)
|
1465 | return offset + 2
|
1466 | }
|
1467 |
|
1468 | Buffer.prototype.writeUint32LE =
|
1469 | Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
|
1470 | value = +value
|
1471 | offset = offset >>> 0
|
1472 | if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
|
1473 | this[offset + 3] = (value >>> 24)
|
1474 | this[offset + 2] = (value >>> 16)
|
1475 | this[offset + 1] = (value >>> 8)
|
1476 | this[offset] = (value & 0xff)
|
1477 | return offset + 4
|
1478 | }
|
1479 |
|
1480 | Buffer.prototype.writeUint32BE =
|
1481 | Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
|
1482 | value = +value
|
1483 | offset = offset >>> 0
|
1484 | if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
|
1485 | this[offset] = (value >>> 24)
|
1486 | this[offset + 1] = (value >>> 16)
|
1487 | this[offset + 2] = (value >>> 8)
|
1488 | this[offset + 3] = (value & 0xff)
|
1489 | return offset + 4
|
1490 | }
|
1491 |
|
1492 | function wrtBigUInt64LE (buf, value, offset, min, max) {
|
1493 | checkIntBI(value, min, max, buf, offset, 7)
|
1494 |
|
1495 | let lo = Number(value & BigInt(0xffffffff))
|
1496 | buf[offset++] = lo
|
1497 | lo = lo >> 8
|
1498 | buf[offset++] = lo
|
1499 | lo = lo >> 8
|
1500 | buf[offset++] = lo
|
1501 | lo = lo >> 8
|
1502 | buf[offset++] = lo
|
1503 | let hi = Number(value >> BigInt(32) & BigInt(0xffffffff))
|
1504 | buf[offset++] = hi
|
1505 | hi = hi >> 8
|
1506 | buf[offset++] = hi
|
1507 | hi = hi >> 8
|
1508 | buf[offset++] = hi
|
1509 | hi = hi >> 8
|
1510 | buf[offset++] = hi
|
1511 | return offset
|
1512 | }
|
1513 |
|
1514 | function wrtBigUInt64BE (buf, value, offset, min, max) {
|
1515 | checkIntBI(value, min, max, buf, offset, 7)
|
1516 |
|
1517 | let lo = Number(value & BigInt(0xffffffff))
|
1518 | buf[offset + 7] = lo
|
1519 | lo = lo >> 8
|
1520 | buf[offset + 6] = lo
|
1521 | lo = lo >> 8
|
1522 | buf[offset + 5] = lo
|
1523 | lo = lo >> 8
|
1524 | buf[offset + 4] = lo
|
1525 | let hi = Number(value >> BigInt(32) & BigInt(0xffffffff))
|
1526 | buf[offset + 3] = hi
|
1527 | hi = hi >> 8
|
1528 | buf[offset + 2] = hi
|
1529 | hi = hi >> 8
|
1530 | buf[offset + 1] = hi
|
1531 | hi = hi >> 8
|
1532 | buf[offset] = hi
|
1533 | return offset + 8
|
1534 | }
|
1535 |
|
1536 | Buffer.prototype.writeBigUInt64LE = defineBigIntMethod(function writeBigUInt64LE (value, offset = 0) {
|
1537 | return wrtBigUInt64LE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff'))
|
1538 | })
|
1539 |
|
1540 | Buffer.prototype.writeBigUInt64BE = defineBigIntMethod(function writeBigUInt64BE (value, offset = 0) {
|
1541 | return wrtBigUInt64BE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff'))
|
1542 | })
|
1543 |
|
1544 | Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
|
1545 | value = +value
|
1546 | offset = offset >>> 0
|
1547 | if (!noAssert) {
|
1548 | const limit = Math.pow(2, (8 * byteLength) - 1)
|
1549 |
|
1550 | checkInt(this, value, offset, byteLength, limit - 1, -limit)
|
1551 | }
|
1552 |
|
1553 | let i = 0
|
1554 | let mul = 1
|
1555 | let sub = 0
|
1556 | this[offset] = value & 0xFF
|
1557 | while (++i < byteLength && (mul *= 0x100)) {
|
1558 | if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
|
1559 | sub = 1
|
1560 | }
|
1561 | this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
|
1562 | }
|
1563 |
|
1564 | return offset + byteLength
|
1565 | }
|
1566 |
|
1567 | Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
|
1568 | value = +value
|
1569 | offset = offset >>> 0
|
1570 | if (!noAssert) {
|
1571 | const limit = Math.pow(2, (8 * byteLength) - 1)
|
1572 |
|
1573 | checkInt(this, value, offset, byteLength, limit - 1, -limit)
|
1574 | }
|
1575 |
|
1576 | let i = byteLength - 1
|
1577 | let mul = 1
|
1578 | let sub = 0
|
1579 | this[offset + i] = value & 0xFF
|
1580 | while (--i >= 0 && (mul *= 0x100)) {
|
1581 | if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
|
1582 | sub = 1
|
1583 | }
|
1584 | this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
|
1585 | }
|
1586 |
|
1587 | return offset + byteLength
|
1588 | }
|
1589 |
|
1590 | Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
|
1591 | value = +value
|
1592 | offset = offset >>> 0
|
1593 | if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
|
1594 | if (value < 0) value = 0xff + value + 1
|
1595 | this[offset] = (value & 0xff)
|
1596 | return offset + 1
|
1597 | }
|
1598 |
|
1599 | Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
|
1600 | value = +value
|
1601 | offset = offset >>> 0
|
1602 | if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
|
1603 | this[offset] = (value & 0xff)
|
1604 | this[offset + 1] = (value >>> 8)
|
1605 | return offset + 2
|
1606 | }
|
1607 |
|
1608 | Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
|
1609 | value = +value
|
1610 | offset = offset >>> 0
|
1611 | if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
|
1612 | this[offset] = (value >>> 8)
|
1613 | this[offset + 1] = (value & 0xff)
|
1614 | return offset + 2
|
1615 | }
|
1616 |
|
1617 | Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
|
1618 | value = +value
|
1619 | offset = offset >>> 0
|
1620 | if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
|
1621 | this[offset] = (value & 0xff)
|
1622 | this[offset + 1] = (value >>> 8)
|
1623 | this[offset + 2] = (value >>> 16)
|
1624 | this[offset + 3] = (value >>> 24)
|
1625 | return offset + 4
|
1626 | }
|
1627 |
|
1628 | Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
|
1629 | value = +value
|
1630 | offset = offset >>> 0
|
1631 | if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
|
1632 | if (value < 0) value = 0xffffffff + value + 1
|
1633 | this[offset] = (value >>> 24)
|
1634 | this[offset + 1] = (value >>> 16)
|
1635 | this[offset + 2] = (value >>> 8)
|
1636 | this[offset + 3] = (value & 0xff)
|
1637 | return offset + 4
|
1638 | }
|
1639 |
|
1640 | Buffer.prototype.writeBigInt64LE = defineBigIntMethod(function writeBigInt64LE (value, offset = 0) {
|
1641 | return wrtBigUInt64LE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff'))
|
1642 | })
|
1643 |
|
1644 | Buffer.prototype.writeBigInt64BE = defineBigIntMethod(function writeBigInt64BE (value, offset = 0) {
|
1645 | return wrtBigUInt64BE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff'))
|
1646 | })
|
1647 |
|
1648 | function checkIEEE754 (buf, value, offset, ext, max, min) {
|
1649 | if (offset + ext > buf.length) throw new RangeError('Index out of range')
|
1650 | if (offset < 0) throw new RangeError('Index out of range')
|
1651 | }
|
1652 |
|
1653 | function writeFloat (buf, value, offset, littleEndian, noAssert) {
|
1654 | value = +value
|
1655 | offset = offset >>> 0
|
1656 | if (!noAssert) {
|
1657 | checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
|
1658 | }
|
1659 | ieee754.write(buf, value, offset, littleEndian, 23, 4)
|
1660 | return offset + 4
|
1661 | }
|
1662 |
|
1663 | Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
|
1664 | return writeFloat(this, value, offset, true, noAssert)
|
1665 | }
|
1666 |
|
1667 | Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
|
1668 | return writeFloat(this, value, offset, false, noAssert)
|
1669 | }
|
1670 |
|
1671 | function writeDouble (buf, value, offset, littleEndian, noAssert) {
|
1672 | value = +value
|
1673 | offset = offset >>> 0
|
1674 | if (!noAssert) {
|
1675 | checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
|
1676 | }
|
1677 | ieee754.write(buf, value, offset, littleEndian, 52, 8)
|
1678 | return offset + 8
|
1679 | }
|
1680 |
|
1681 | Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
|
1682 | return writeDouble(this, value, offset, true, noAssert)
|
1683 | }
|
1684 |
|
1685 | Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
|
1686 | return writeDouble(this, value, offset, false, noAssert)
|
1687 | }
|
1688 |
|
1689 |
|
1690 | Buffer.prototype.copy = function copy (target, targetStart, start, end) {
|
1691 | if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
|
1692 | if (!start) start = 0
|
1693 | if (!end && end !== 0) end = this.length
|
1694 | if (targetStart >= target.length) targetStart = target.length
|
1695 | if (!targetStart) targetStart = 0
|
1696 | if (end > 0 && end < start) end = start
|
1697 |
|
1698 |
|
1699 | if (end === start) return 0
|
1700 | if (target.length === 0 || this.length === 0) return 0
|
1701 |
|
1702 |
|
1703 | if (targetStart < 0) {
|
1704 | throw new RangeError('targetStart out of bounds')
|
1705 | }
|
1706 | if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
|
1707 | if (end < 0) throw new RangeError('sourceEnd out of bounds')
|
1708 |
|
1709 |
|
1710 | if (end > this.length) end = this.length
|
1711 | if (target.length - targetStart < end - start) {
|
1712 | end = target.length - targetStart + start
|
1713 | }
|
1714 |
|
1715 | const len = end - start
|
1716 |
|
1717 | if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
|
1718 |
|
1719 | this.copyWithin(targetStart, start, end)
|
1720 | } else {
|
1721 | Uint8Array.prototype.set.call(
|
1722 | target,
|
1723 | this.subarray(start, end),
|
1724 | targetStart
|
1725 | )
|
1726 | }
|
1727 |
|
1728 | return len
|
1729 | }
|
1730 |
|
1731 |
|
1732 |
|
1733 |
|
1734 |
|
1735 | Buffer.prototype.fill = function fill (val, start, end, encoding) {
|
1736 |
|
1737 | if (typeof val === 'string') {
|
1738 | if (typeof start === 'string') {
|
1739 | encoding = start
|
1740 | start = 0
|
1741 | end = this.length
|
1742 | } else if (typeof end === 'string') {
|
1743 | encoding = end
|
1744 | end = this.length
|
1745 | }
|
1746 | if (encoding !== undefined && typeof encoding !== 'string') {
|
1747 | throw new TypeError('encoding must be a string')
|
1748 | }
|
1749 | if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
|
1750 | throw new TypeError('Unknown encoding: ' + encoding)
|
1751 | }
|
1752 | if (val.length === 1) {
|
1753 | const code = val.charCodeAt(0)
|
1754 | if ((encoding === 'utf8' && code < 128) ||
|
1755 | encoding === 'latin1') {
|
1756 |
|
1757 | val = code
|
1758 | }
|
1759 | }
|
1760 | } else if (typeof val === 'number') {
|
1761 | val = val & 255
|
1762 | } else if (typeof val === 'boolean') {
|
1763 | val = Number(val)
|
1764 | }
|
1765 |
|
1766 |
|
1767 | if (start < 0 || this.length < start || this.length < end) {
|
1768 | throw new RangeError('Out of range index')
|
1769 | }
|
1770 |
|
1771 | if (end <= start) {
|
1772 | return this
|
1773 | }
|
1774 |
|
1775 | start = start >>> 0
|
1776 | end = end === undefined ? this.length : end >>> 0
|
1777 |
|
1778 | if (!val) val = 0
|
1779 |
|
1780 | let i
|
1781 | if (typeof val === 'number') {
|
1782 | for (i = start; i < end; ++i) {
|
1783 | this[i] = val
|
1784 | }
|
1785 | } else {
|
1786 | const bytes = Buffer.isBuffer(val)
|
1787 | ? val
|
1788 | : Buffer.from(val, encoding)
|
1789 | const len = bytes.length
|
1790 | if (len === 0) {
|
1791 | throw new TypeError('The value "' + val +
|
1792 | '" is invalid for argument "value"')
|
1793 | }
|
1794 | for (i = 0; i < end - start; ++i) {
|
1795 | this[i + start] = bytes[i % len]
|
1796 | }
|
1797 | }
|
1798 |
|
1799 | return this
|
1800 | }
|
1801 |
|
1802 |
|
1803 |
|
1804 |
|
1805 |
|
1806 | const errors = {}
|
1807 | function E (sym, getMessage, Base) {
|
1808 | errors[sym] = class NodeError extends Base {
|
1809 | constructor () {
|
1810 | super()
|
1811 |
|
1812 | Object.defineProperty(this, 'message', {
|
1813 | value: getMessage.apply(this, arguments),
|
1814 | writable: true,
|
1815 | configurable: true
|
1816 | })
|
1817 |
|
1818 |
|
1819 | this.name = `${this.name} [${sym}]`
|
1820 |
|
1821 |
|
1822 | this.stack
|
1823 |
|
1824 | delete this.name
|
1825 | }
|
1826 |
|
1827 | get code () {
|
1828 | return sym
|
1829 | }
|
1830 |
|
1831 | set code (value) {
|
1832 | Object.defineProperty(this, 'code', {
|
1833 | configurable: true,
|
1834 | enumerable: true,
|
1835 | value,
|
1836 | writable: true
|
1837 | })
|
1838 | }
|
1839 |
|
1840 | toString () {
|
1841 | return `${this.name} [${sym}]: ${this.message}`
|
1842 | }
|
1843 | }
|
1844 | }
|
1845 |
|
1846 | E('ERR_BUFFER_OUT_OF_BOUNDS',
|
1847 | function (name) {
|
1848 | if (name) {
|
1849 | return `${name} is outside of buffer bounds`
|
1850 | }
|
1851 |
|
1852 | return 'Attempt to access memory outside buffer bounds'
|
1853 | }, RangeError)
|
1854 | E('ERR_INVALID_ARG_TYPE',
|
1855 | function (name, actual) {
|
1856 | return `The "${name}" argument must be of type number. Received type ${typeof actual}`
|
1857 | }, TypeError)
|
1858 | E('ERR_OUT_OF_RANGE',
|
1859 | function (str, range, input) {
|
1860 | let msg = `The value of "${str}" is out of range.`
|
1861 | let received = input
|
1862 | if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) {
|
1863 | received = addNumericalSeparator(String(input))
|
1864 | } else if (typeof input === 'bigint') {
|
1865 | received = String(input)
|
1866 | if (input > BigInt(2) ** BigInt(32) || input < -(BigInt(2) ** BigInt(32))) {
|
1867 | received = addNumericalSeparator(received)
|
1868 | }
|
1869 | received += 'n'
|
1870 | }
|
1871 | msg += ` It must be ${range}. Received ${received}`
|
1872 | return msg
|
1873 | }, RangeError)
|
1874 |
|
1875 | function addNumericalSeparator (val) {
|
1876 | let res = ''
|
1877 | let i = val.length
|
1878 | const start = val[0] === '-' ? 1 : 0
|
1879 | for (; i >= start + 4; i -= 3) {
|
1880 | res = `_${val.slice(i - 3, i)}${res}`
|
1881 | }
|
1882 | return `${val.slice(0, i)}${res}`
|
1883 | }
|
1884 |
|
1885 |
|
1886 |
|
1887 |
|
1888 | function checkBounds (buf, offset, byteLength) {
|
1889 | validateNumber(offset, 'offset')
|
1890 | if (buf[offset] === undefined || buf[offset + byteLength] === undefined) {
|
1891 | boundsError(offset, buf.length - (byteLength + 1))
|
1892 | }
|
1893 | }
|
1894 |
|
1895 | function checkIntBI (value, min, max, buf, offset, byteLength) {
|
1896 | if (value > max || value < min) {
|
1897 | const n = typeof min === 'bigint' ? 'n' : ''
|
1898 | let range
|
1899 | if (byteLength > 3) {
|
1900 | if (min === 0 || min === BigInt(0)) {
|
1901 | range = `>= 0${n} and < 2${n} ** ${(byteLength + 1) * 8}${n}`
|
1902 | } else {
|
1903 | range = `>= -(2${n} ** ${(byteLength + 1) * 8 - 1}${n}) and < 2 ** ` +
|
1904 | `${(byteLength + 1) * 8 - 1}${n}`
|
1905 | }
|
1906 | } else {
|
1907 | range = `>= ${min}${n} and <= ${max}${n}`
|
1908 | }
|
1909 | throw new errors.ERR_OUT_OF_RANGE('value', range, value)
|
1910 | }
|
1911 | checkBounds(buf, offset, byteLength)
|
1912 | }
|
1913 |
|
1914 | function validateNumber (value, name) {
|
1915 | if (typeof value !== 'number') {
|
1916 | throw new errors.ERR_INVALID_ARG_TYPE(name, 'number', value)
|
1917 | }
|
1918 | }
|
1919 |
|
1920 | function boundsError (value, length, type) {
|
1921 | if (Math.floor(value) !== value) {
|
1922 | validateNumber(value, type)
|
1923 | throw new errors.ERR_OUT_OF_RANGE(type || 'offset', 'an integer', value)
|
1924 | }
|
1925 |
|
1926 | if (length < 0) {
|
1927 | throw new errors.ERR_BUFFER_OUT_OF_BOUNDS()
|
1928 | }
|
1929 |
|
1930 | throw new errors.ERR_OUT_OF_RANGE(type || 'offset',
|
1931 | `>= ${type ? 1 : 0} and <= ${length}`,
|
1932 | value)
|
1933 | }
|
1934 |
|
1935 |
|
1936 |
|
1937 |
|
1938 | const INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
|
1939 |
|
1940 | function base64clean (str) {
|
1941 |
|
1942 | str = str.split('=')[0]
|
1943 |
|
1944 | str = str.trim().replace(INVALID_BASE64_RE, '')
|
1945 |
|
1946 | if (str.length < 2) return ''
|
1947 |
|
1948 | while (str.length % 4 !== 0) {
|
1949 | str = str + '='
|
1950 | }
|
1951 | return str
|
1952 | }
|
1953 |
|
1954 | function utf8ToBytes (string, units) {
|
1955 | units = units || Infinity
|
1956 | let codePoint
|
1957 | const length = string.length
|
1958 | let leadSurrogate = null
|
1959 | const bytes = []
|
1960 |
|
1961 | for (let i = 0; i < length; ++i) {
|
1962 | codePoint = string.charCodeAt(i)
|
1963 |
|
1964 |
|
1965 | if (codePoint > 0xD7FF && codePoint < 0xE000) {
|
1966 |
|
1967 | if (!leadSurrogate) {
|
1968 |
|
1969 | if (codePoint > 0xDBFF) {
|
1970 |
|
1971 | if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
1972 | continue
|
1973 | } else if (i + 1 === length) {
|
1974 |
|
1975 | if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
1976 | continue
|
1977 | }
|
1978 |
|
1979 |
|
1980 | leadSurrogate = codePoint
|
1981 |
|
1982 | continue
|
1983 | }
|
1984 |
|
1985 |
|
1986 | if (codePoint < 0xDC00) {
|
1987 | if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
1988 | leadSurrogate = codePoint
|
1989 | continue
|
1990 | }
|
1991 |
|
1992 |
|
1993 | codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
|
1994 | } else if (leadSurrogate) {
|
1995 |
|
1996 | if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
1997 | }
|
1998 |
|
1999 | leadSurrogate = null
|
2000 |
|
2001 |
|
2002 | if (codePoint < 0x80) {
|
2003 | if ((units -= 1) < 0) break
|
2004 | bytes.push(codePoint)
|
2005 | } else if (codePoint < 0x800) {
|
2006 | if ((units -= 2) < 0) break
|
2007 | bytes.push(
|
2008 | codePoint >> 0x6 | 0xC0,
|
2009 | codePoint & 0x3F | 0x80
|
2010 | )
|
2011 | } else if (codePoint < 0x10000) {
|
2012 | if ((units -= 3) < 0) break
|
2013 | bytes.push(
|
2014 | codePoint >> 0xC | 0xE0,
|
2015 | codePoint >> 0x6 & 0x3F | 0x80,
|
2016 | codePoint & 0x3F | 0x80
|
2017 | )
|
2018 | } else if (codePoint < 0x110000) {
|
2019 | if ((units -= 4) < 0) break
|
2020 | bytes.push(
|
2021 | codePoint >> 0x12 | 0xF0,
|
2022 | codePoint >> 0xC & 0x3F | 0x80,
|
2023 | codePoint >> 0x6 & 0x3F | 0x80,
|
2024 | codePoint & 0x3F | 0x80
|
2025 | )
|
2026 | } else {
|
2027 | throw new Error('Invalid code point')
|
2028 | }
|
2029 | }
|
2030 |
|
2031 | return bytes
|
2032 | }
|
2033 |
|
2034 | function asciiToBytes (str) {
|
2035 | const byteArray = []
|
2036 | for (let i = 0; i < str.length; ++i) {
|
2037 |
|
2038 | byteArray.push(str.charCodeAt(i) & 0xFF)
|
2039 | }
|
2040 | return byteArray
|
2041 | }
|
2042 |
|
2043 | function utf16leToBytes (str, units) {
|
2044 | let c, hi, lo
|
2045 | const byteArray = []
|
2046 | for (let i = 0; i < str.length; ++i) {
|
2047 | if ((units -= 2) < 0) break
|
2048 |
|
2049 | c = str.charCodeAt(i)
|
2050 | hi = c >> 8
|
2051 | lo = c % 256
|
2052 | byteArray.push(lo)
|
2053 | byteArray.push(hi)
|
2054 | }
|
2055 |
|
2056 | return byteArray
|
2057 | }
|
2058 |
|
2059 | function base64ToBytes (str) {
|
2060 | return base64.toByteArray(base64clean(str))
|
2061 | }
|
2062 |
|
2063 | function blitBuffer (src, dst, offset, length) {
|
2064 | let i
|
2065 | for (i = 0; i < length; ++i) {
|
2066 | if ((i + offset >= dst.length) || (i >= src.length)) break
|
2067 | dst[i + offset] = src[i]
|
2068 | }
|
2069 | return i
|
2070 | }
|
2071 |
|
2072 |
|
2073 |
|
2074 |
|
2075 | function isInstance (obj, type) {
|
2076 | return obj instanceof type ||
|
2077 | (obj != null && obj.constructor != null && obj.constructor.name != null &&
|
2078 | obj.constructor.name === type.name)
|
2079 | }
|
2080 | function numberIsNaN (obj) {
|
2081 |
|
2082 | return obj !== obj
|
2083 | }
|
2084 |
|
2085 |
|
2086 |
|
2087 | const hexSliceLookupTable = (function () {
|
2088 | const alphabet = '0123456789abcdef'
|
2089 | const table = new Array(256)
|
2090 | for (let i = 0; i < 16; ++i) {
|
2091 | const i16 = i * 16
|
2092 | for (let j = 0; j < 16; ++j) {
|
2093 | table[i16 + j] = alphabet[i] + alphabet[j]
|
2094 | }
|
2095 | }
|
2096 | return table
|
2097 | })()
|
2098 |
|
2099 |
|
2100 | function defineBigIntMethod (fn) {
|
2101 | return typeof BigInt === 'undefined' ? BufferBigIntNotDefined : fn
|
2102 | }
|
2103 |
|
2104 | function BufferBigIntNotDefined () {
|
2105 | throw new Error('BigInt not supported')
|
2106 | }
|