1 | 'use strict';
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2 |
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3 | function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
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4 |
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5 | function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
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6 |
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7 | function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
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8 |
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9 | function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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10 |
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11 | function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
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12 |
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13 | function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
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14 |
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15 | var _require = require('buffer'),
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16 | Buffer = _require.Buffer;
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17 |
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18 | var _require2 = require('util'),
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19 | inspect = _require2.inspect;
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20 |
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21 | var custom = inspect && inspect.custom || 'inspect';
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22 |
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23 | function copyBuffer(src, target, offset) {
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24 | Buffer.prototype.copy.call(src, target, offset);
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25 | }
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26 |
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27 | module.exports =
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28 | /*#__PURE__*/
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29 | function () {
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30 | function BufferList() {
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31 | _classCallCheck(this, BufferList);
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32 |
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33 | this.head = null;
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34 | this.tail = null;
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35 | this.length = 0;
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36 | }
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37 |
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38 | _createClass(BufferList, [{
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39 | key: "push",
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40 | value: function push(v) {
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41 | var entry = {
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42 | data: v,
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43 | next: null
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44 | };
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45 | if (this.length > 0) this.tail.next = entry;else this.head = entry;
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46 | this.tail = entry;
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47 | ++this.length;
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48 | }
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49 | }, {
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50 | key: "unshift",
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51 | value: function unshift(v) {
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52 | var entry = {
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53 | data: v,
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54 | next: this.head
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55 | };
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56 | if (this.length === 0) this.tail = entry;
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57 | this.head = entry;
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58 | ++this.length;
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59 | }
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60 | }, {
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61 | key: "shift",
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62 | value: function shift() {
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63 | if (this.length === 0) return;
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64 | var ret = this.head.data;
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65 | if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
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66 | --this.length;
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67 | return ret;
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68 | }
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69 | }, {
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70 | key: "clear",
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71 | value: function clear() {
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72 | this.head = this.tail = null;
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73 | this.length = 0;
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74 | }
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75 | }, {
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76 | key: "join",
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77 | value: function join(s) {
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78 | if (this.length === 0) return '';
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79 | var p = this.head;
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80 | var ret = '' + p.data;
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81 |
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82 | while (p = p.next) {
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83 | ret += s + p.data;
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84 | }
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85 |
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86 | return ret;
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87 | }
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88 | }, {
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89 | key: "concat",
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90 | value: function concat(n) {
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91 | if (this.length === 0) return Buffer.alloc(0);
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92 | var ret = Buffer.allocUnsafe(n >>> 0);
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93 | var p = this.head;
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94 | var i = 0;
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95 |
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96 | while (p) {
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97 | copyBuffer(p.data, ret, i);
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98 | i += p.data.length;
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99 | p = p.next;
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100 | }
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101 |
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102 | return ret;
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103 | } // Consumes a specified amount of bytes or characters from the buffered data.
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104 |
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105 | }, {
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106 | key: "consume",
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107 | value: function consume(n, hasStrings) {
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108 | var ret;
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109 |
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110 | if (n < this.head.data.length) {
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111 | // `slice` is the same for buffers and strings.
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112 | ret = this.head.data.slice(0, n);
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113 | this.head.data = this.head.data.slice(n);
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114 | } else if (n === this.head.data.length) {
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115 | // First chunk is a perfect match.
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116 | ret = this.shift();
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117 | } else {
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118 | // Result spans more than one buffer.
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119 | ret = hasStrings ? this._getString(n) : this._getBuffer(n);
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120 | }
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121 |
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122 | return ret;
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123 | }
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124 | }, {
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125 | key: "first",
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126 | value: function first() {
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127 | return this.head.data;
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128 | } // Consumes a specified amount of characters from the buffered data.
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129 |
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130 | }, {
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131 | key: "_getString",
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132 | value: function _getString(n) {
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133 | var p = this.head;
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134 | var c = 1;
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135 | var ret = p.data;
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136 | n -= ret.length;
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137 |
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138 | while (p = p.next) {
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139 | var str = p.data;
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140 | var nb = n > str.length ? str.length : n;
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141 | if (nb === str.length) ret += str;else ret += str.slice(0, n);
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142 | n -= nb;
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143 |
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144 | if (n === 0) {
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145 | if (nb === str.length) {
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146 | ++c;
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147 | if (p.next) this.head = p.next;else this.head = this.tail = null;
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148 | } else {
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149 | this.head = p;
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150 | p.data = str.slice(nb);
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151 | }
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152 |
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153 | break;
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154 | }
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155 |
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156 | ++c;
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157 | }
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158 |
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159 | this.length -= c;
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160 | return ret;
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161 | } // Consumes a specified amount of bytes from the buffered data.
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162 |
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163 | }, {
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164 | key: "_getBuffer",
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165 | value: function _getBuffer(n) {
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166 | var ret = Buffer.allocUnsafe(n);
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167 | var p = this.head;
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168 | var c = 1;
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169 | p.data.copy(ret);
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170 | n -= p.data.length;
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171 |
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172 | while (p = p.next) {
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173 | var buf = p.data;
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174 | var nb = n > buf.length ? buf.length : n;
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175 | buf.copy(ret, ret.length - n, 0, nb);
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176 | n -= nb;
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177 |
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178 | if (n === 0) {
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179 | if (nb === buf.length) {
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180 | ++c;
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181 | if (p.next) this.head = p.next;else this.head = this.tail = null;
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182 | } else {
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183 | this.head = p;
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184 | p.data = buf.slice(nb);
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185 | }
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186 |
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187 | break;
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188 | }
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189 |
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190 | ++c;
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191 | }
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192 |
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193 | this.length -= c;
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194 | return ret;
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195 | } // Make sure the linked list only shows the minimal necessary information.
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196 |
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197 | }, {
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198 | key: custom,
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199 | value: function value(_, options) {
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200 | return inspect(this, _objectSpread({}, options, {
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201 | // Only inspect one level.
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202 | depth: 0,
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203 | // It should not recurse.
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204 | customInspect: false
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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 | return BufferList;
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210 | }(); |
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