1 |
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2 |
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3 | var token = exports.token = new Array(256);
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4 |
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5 | var BufferLite = require("./buffer-lite");
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6 | var uint8 = require("./write-uint8").uint8;
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7 |
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8 | var NO_ASSERT = true;
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9 | var IS_BUFFER_SHIM = ("TYPED_ARRAY_SUPPORT" in Buffer);
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10 | var NO_TYPED_ARRAY = IS_BUFFER_SHIM && !Buffer.TYPED_ARRAY_SUPPORT;
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11 |
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12 | init();
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13 |
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14 | function init() {
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15 |
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16 |
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17 |
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18 |
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19 |
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20 | for (var i = 0x00; i <= 0xFF; i++) {
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21 | token[i] = uint8[i];
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22 | }
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23 |
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24 | if (NO_TYPED_ARRAY) {
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25 | init_compatible();
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26 | } else {
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27 | init_optimized();
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28 | }
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29 | }
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30 |
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31 | function init_optimized() {
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32 |
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33 |
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34 |
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35 | token[0xc4] = write1(0xc4);
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36 | token[0xc5] = write2(0xc5);
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37 | token[0xc6] = write4(0xc6);
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38 |
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39 |
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40 |
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41 |
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42 | token[0xc7] = write1(0xc7);
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43 | token[0xc8] = write2(0xc8);
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44 | token[0xc9] = write4(0xc9);
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45 |
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46 |
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47 |
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48 | token[0xca] = writeN(0xca, 4, Buffer.prototype.writeFloatBE);
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49 | token[0xcb] = writeN(0xcb, 8, Buffer.prototype.writeDoubleBE);
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50 |
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51 |
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52 |
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53 |
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54 |
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55 | token[0xcc] = write1(0xcc);
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56 | token[0xcd] = write2(0xcd);
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57 | token[0xce] = write4(0xce);
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58 | token[0xcf] = writeN(0xcf, 8, BufferLite.writeUint64BE);
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59 |
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60 |
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61 |
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62 |
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63 |
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64 | token[0xd0] = write1(0xd0);
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65 | token[0xd1] = write2(0xd1);
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66 | token[0xd2] = write4(0xd2);
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67 | token[0xd3] = writeN(0xd3, 8, BufferLite.writeUint64BE);
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68 |
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69 |
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70 |
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71 |
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72 | token[0xd9] = write1(0xd9);
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73 | token[0xda] = write2(0xda);
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74 | token[0xdb] = write4(0xdb);
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75 |
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76 |
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77 |
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78 | token[0xdc] = write2(0xdc);
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79 | token[0xdd] = write4(0xdd);
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80 |
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81 |
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82 |
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83 | token[0xde] = write2(0xde);
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84 | token[0xdf] = write4(0xdf);
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85 | }
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86 |
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87 | function init_compatible() {
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88 |
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89 |
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90 |
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91 | token[0xc4] = writeN(0xc4, 1, Buffer.prototype.writeUInt8);
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92 | token[0xc5] = writeN(0xc5, 2, Buffer.prototype.writeUInt16BE);
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93 | token[0xc6] = writeN(0xc6, 4, Buffer.prototype.writeUInt32BE);
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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 | token[0xc7] = writeN(0xc7, 1, Buffer.prototype.writeUInt8);
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99 | token[0xc8] = writeN(0xc8, 2, Buffer.prototype.writeUInt16BE);
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100 | token[0xc9] = writeN(0xc9, 4, Buffer.prototype.writeUInt32BE);
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101 |
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102 |
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103 |
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104 | token[0xca] = writeN(0xca, 4, Buffer.prototype.writeFloatBE);
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105 | token[0xcb] = writeN(0xcb, 8, Buffer.prototype.writeDoubleBE);
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106 |
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107 |
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108 |
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109 |
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110 |
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111 | token[0xcc] = writeN(0xcc, 1, Buffer.prototype.writeUInt8);
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112 | token[0xcd] = writeN(0xcd, 2, Buffer.prototype.writeUInt16BE);
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113 | token[0xce] = writeN(0xce, 4, Buffer.prototype.writeUInt32BE);
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114 | token[0xcf] = writeN(0xcf, 8, BufferLite.writeUint64BE);
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115 |
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116 |
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117 |
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118 |
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119 |
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120 | token[0xd0] = writeN(0xd0, 1, Buffer.prototype.writeInt8);
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121 | token[0xd1] = writeN(0xd1, 2, Buffer.prototype.writeInt16BE);
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122 | token[0xd2] = writeN(0xd2, 4, Buffer.prototype.writeInt32BE);
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123 | token[0xd3] = writeN(0xd3, 8, BufferLite.writeUint64BE);
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124 |
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125 |
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126 |
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127 |
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128 | token[0xd9] = writeN(0xd9, 1, Buffer.prototype.writeUInt8);
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129 | token[0xda] = writeN(0xda, 2, Buffer.prototype.writeUInt16BE);
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130 | token[0xdb] = writeN(0xdb, 4, Buffer.prototype.writeUInt32BE);
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131 |
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132 |
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133 |
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134 | token[0xdc] = writeN(0xdc, 2, Buffer.prototype.writeUInt16BE);
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135 | token[0xdd] = writeN(0xdd, 4, Buffer.prototype.writeUInt32BE);
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136 |
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137 |
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138 |
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139 | token[0xde] = writeN(0xde, 2, Buffer.prototype.writeUInt16BE);
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140 | token[0xdf] = writeN(0xdf, 4, Buffer.prototype.writeUInt32BE);
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141 | }
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142 |
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143 | function write1(type) {
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144 | return function(encoder, value) {
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145 | encoder.reserve(2);
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146 | var buffer = encoder.buffer;
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147 | var offset = encoder.offset;
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148 | buffer[offset++] = type;
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149 | buffer[offset++] = value;
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150 | encoder.offset = offset;
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151 | };
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152 | }
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153 |
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154 | function write2(type) {
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155 | return function(encoder, value) {
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156 | encoder.reserve(3);
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157 | var buffer = encoder.buffer;
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158 | var offset = encoder.offset;
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159 | buffer[offset++] = type;
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160 | buffer[offset++] = value >>> 8;
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161 | buffer[offset++] = value;
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162 | encoder.offset = offset;
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163 | };
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164 | }
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165 |
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166 | function write4(type) {
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167 | return function(encoder, value) {
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168 | encoder.reserve(5);
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169 | var buffer = encoder.buffer;
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170 | var offset = encoder.offset;
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171 | buffer[offset++] = type;
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172 | buffer[offset++] = value >>> 24;
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173 | buffer[offset++] = value >>> 16;
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174 | buffer[offset++] = value >>> 8;
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175 | buffer[offset++] = value;
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176 | encoder.offset = offset;
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177 | };
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178 | }
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179 |
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180 | function writeN(type, len, method) {
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181 | return function(encoder, value) {
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182 | encoder.reserve(len + 1);
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183 | encoder.buffer[encoder.offset++] = type;
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184 | method.call(encoder.buffer, value, encoder.offset, NO_ASSERT);
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185 | encoder.offset += len;
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186 | };
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187 | }
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