Mercurial Hosting > luan
annotate src/org/eclipse/jetty/io/BufferUtil.java @ 975:53b3f7d9714c
simplify BlockingChannelConnector
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 16 Oct 2016 01:10:02 -0600 |
parents | 3428c60d7cfc |
children | 4dc1e1a18661 |
rev | line source |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.io; |
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20 |
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21 import org.eclipse.jetty.io.BufferCache.CachedBuffer; |
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22 import org.eclipse.jetty.util.StringUtil; |
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23 |
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24 /* ------------------------------------------------------------------------------- */ |
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25 /** Buffer utility methods. |
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26 * |
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27 * |
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28 */ |
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29 public class BufferUtil |
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30 { |
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31 static final byte SPACE= 0x20; |
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32 static final byte MINUS= '-'; |
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33 static final byte[] DIGIT= |
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34 {(byte)'0',(byte)'1',(byte)'2',(byte)'3',(byte)'4',(byte)'5',(byte)'6',(byte)'7',(byte)'8',(byte)'9',(byte)'A',(byte)'B',(byte)'C',(byte)'D',(byte)'E',(byte)'F'}; |
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35 |
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36 /** |
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37 * Convert buffer to an integer. |
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38 * Parses up to the first non-numeric character. If no number is found an |
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39 * IllegalArgumentException is thrown |
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40 * @param buffer A buffer containing an integer. The position is not changed. |
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41 * @return an int |
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42 */ |
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43 public static int toInt(Buffer buffer) |
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44 { |
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45 int val= 0; |
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46 boolean started= false; |
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47 boolean minus= false; |
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48 for (int i= buffer.getIndex(); i < buffer.putIndex(); i++) |
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49 { |
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50 byte b= buffer.peek(i); |
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51 if (b <= SPACE) |
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52 { |
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53 if (started) |
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54 break; |
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55 } |
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56 else if (b >= '0' && b <= '9') |
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57 { |
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58 val= val * 10 + (b - '0'); |
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59 started= true; |
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60 } |
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61 else if (b == MINUS && !started) |
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62 { |
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63 minus= true; |
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64 } |
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65 else |
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66 break; |
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67 } |
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68 |
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69 if (started) |
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70 return minus ? (-val) : val; |
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71 throw new NumberFormatException(buffer.toString()); |
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72 } |
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73 |
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74 /** |
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75 * Convert buffer to an long. |
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76 * Parses up to the first non-numeric character. If no number is found an |
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77 * IllegalArgumentException is thrown |
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78 * @param buffer A buffer containing an integer. The position is not changed. |
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79 * @return an int |
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80 */ |
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81 public static long toLong(Buffer buffer) |
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82 { |
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83 long val= 0; |
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84 boolean started= false; |
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85 boolean minus= false; |
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86 for (int i= buffer.getIndex(); i < buffer.putIndex(); i++) |
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87 { |
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88 byte b= buffer.peek(i); |
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89 if (b <= SPACE) |
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90 { |
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91 if (started) |
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92 break; |
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93 } |
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94 else if (b >= '0' && b <= '9') |
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95 { |
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96 val= val * 10L + (b - '0'); |
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97 started= true; |
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98 } |
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99 else if (b == MINUS && !started) |
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100 { |
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101 minus= true; |
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102 } |
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103 else |
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104 break; |
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105 } |
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106 |
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107 if (started) |
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108 return minus ? (-val) : val; |
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109 throw new NumberFormatException(buffer.toString()); |
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110 } |
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111 |
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112 public static void putHexInt(Buffer buffer, int n) |
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113 { |
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114 |
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115 if (n < 0) |
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116 { |
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117 buffer.put((byte)'-'); |
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118 |
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119 if (n == Integer.MIN_VALUE) |
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120 { |
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121 buffer.put((byte)(0x7f&'8')); |
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122 buffer.put((byte)(0x7f&'0')); |
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123 buffer.put((byte)(0x7f&'0')); |
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124 buffer.put((byte)(0x7f&'0')); |
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125 buffer.put((byte)(0x7f&'0')); |
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126 buffer.put((byte)(0x7f&'0')); |
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127 buffer.put((byte)(0x7f&'0')); |
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128 buffer.put((byte)(0x7f&'0')); |
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129 |
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130 return; |
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131 } |
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132 n= -n; |
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133 } |
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134 |
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135 if (n < 0x10) |
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136 { |
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137 buffer.put(DIGIT[n]); |
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138 } |
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139 else |
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140 { |
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141 boolean started= false; |
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142 // This assumes constant time int arithmatic |
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143 for (int i= 0; i < hexDivisors.length; i++) |
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144 { |
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145 if (n < hexDivisors[i]) |
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146 { |
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147 if (started) |
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148 buffer.put((byte)'0'); |
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149 continue; |
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150 } |
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151 |
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152 started= true; |
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153 int d= n / hexDivisors[i]; |
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154 buffer.put(DIGIT[d]); |
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155 n= n - d * hexDivisors[i]; |
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156 } |
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157 } |
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158 } |
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159 |
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160 /* ------------------------------------------------------------ */ |
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161 /** |
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162 * Add hex integer BEFORE current getIndex. |
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163 * @param buffer |
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164 * @param n |
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165 */ |
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166 public static void prependHexInt(Buffer buffer, int n) |
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167 { |
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168 if (n==0) |
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169 { |
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170 int gi=buffer.getIndex(); |
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171 buffer.poke(--gi,(byte)'0'); |
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172 buffer.setGetIndex(gi); |
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173 } |
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174 else |
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175 { |
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176 boolean minus=false; |
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177 if (n<0) |
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178 { |
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179 minus=true; |
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180 n=-n; |
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181 } |
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182 |
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183 int gi=buffer.getIndex(); |
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184 while(n>0) |
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185 { |
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186 int d = 0xf&n; |
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187 n=n>>4; |
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188 buffer.poke(--gi,DIGIT[d]); |
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189 } |
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190 |
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191 if (minus) |
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192 buffer.poke(--gi,(byte)'-'); |
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193 buffer.setGetIndex(gi); |
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194 } |
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195 } |
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196 |
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197 |
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198 /* ------------------------------------------------------------ */ |
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199 public static void putDecInt(Buffer buffer, int n) |
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200 { |
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201 if (n < 0) |
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202 { |
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203 buffer.put((byte)'-'); |
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204 |
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205 if (n == Integer.MIN_VALUE) |
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206 { |
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207 buffer.put((byte)'2'); |
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208 n= 147483648; |
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209 } |
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210 else |
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211 n= -n; |
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212 } |
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213 |
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214 if (n < 10) |
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215 { |
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216 buffer.put(DIGIT[n]); |
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217 } |
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218 else |
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219 { |
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220 boolean started= false; |
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221 // This assumes constant time int arithmatic |
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222 for (int i= 0; i < decDivisors.length; i++) |
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223 { |
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224 if (n < decDivisors[i]) |
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225 { |
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226 if (started) |
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227 buffer.put((byte)'0'); |
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228 continue; |
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229 } |
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230 |
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231 started= true; |
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232 int d= n / decDivisors[i]; |
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233 buffer.put(DIGIT[d]); |
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234 n= n - d * decDivisors[i]; |
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235 } |
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236 } |
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237 } |
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238 |
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239 public static void putDecLong(Buffer buffer, long n) |
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240 { |
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241 if (n < 0) |
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242 { |
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243 buffer.put((byte)'-'); |
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244 |
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245 if (n == Long.MIN_VALUE) |
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246 { |
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247 buffer.put((byte)'9'); |
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248 n= 223372036854775808L; |
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249 } |
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250 else |
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251 n= -n; |
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252 } |
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253 |
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254 if (n < 10) |
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255 { |
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256 buffer.put(DIGIT[(int)n]); |
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257 } |
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258 else |
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259 { |
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260 boolean started= false; |
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261 // This assumes constant time int arithmatic |
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262 for (int i= 0; i < decDivisorsL.length; i++) |
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263 { |
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264 if (n < decDivisorsL[i]) |
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265 { |
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266 if (started) |
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267 buffer.put((byte)'0'); |
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268 continue; |
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269 } |
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270 |
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271 started= true; |
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272 long d= n / decDivisorsL[i]; |
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273 buffer.put(DIGIT[(int)d]); |
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274 n= n - d * decDivisorsL[i]; |
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275 } |
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276 } |
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277 } |
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278 |
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279 public static Buffer toBuffer(long value) |
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280 { |
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281 ByteArrayBuffer buf=new ByteArrayBuffer(32); |
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282 putDecLong(buf, value); |
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283 return buf; |
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284 } |
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285 |
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286 private final static int[] decDivisors= |
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287 { |
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288 1000000000, |
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289 100000000, |
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290 10000000, |
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291 1000000, |
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292 100000, |
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293 10000, |
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294 1000, |
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295 100, |
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296 10, |
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297 1 |
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298 }; |
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299 |
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300 private final static int[] hexDivisors= |
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301 { |
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302 0x10000000, |
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303 0x1000000, |
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304 0x100000, |
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305 0x10000, |
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306 0x1000, |
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307 0x100, |
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308 0x10, |
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309 0x1 |
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310 }; |
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311 |
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312 private final static long[] decDivisorsL= |
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313 { |
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314 1000000000000000000L, |
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315 100000000000000000L, |
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316 10000000000000000L, |
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317 1000000000000000L, |
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318 100000000000000L, |
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319 10000000000000L, |
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320 1000000000000L, |
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321 100000000000L, |
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322 10000000000L, |
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323 1000000000L, |
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324 100000000L, |
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325 10000000L, |
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326 1000000L, |
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327 100000L, |
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328 10000L, |
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329 1000L, |
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330 100L, |
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331 10L, |
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332 1L |
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333 }; |
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334 |
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335 |
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336 public static void putCRLF(Buffer buffer) |
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337 { |
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338 buffer.put((byte)13); |
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339 buffer.put((byte)10); |
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340 } |
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341 |
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342 public static boolean isPrefix(Buffer prefix,Buffer buffer) |
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343 { |
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344 if (prefix.length()>buffer.length()) |
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345 return false; |
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346 int bi=buffer.getIndex(); |
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347 for (int i=prefix.getIndex(); i<prefix.putIndex();i++) |
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348 if (prefix.peek(i)!=buffer.peek(bi++)) |
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349 return false; |
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350 return true; |
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351 } |
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352 |
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353 public static String to8859_1_String(Buffer buffer) |
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354 { |
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355 if (buffer instanceof CachedBuffer) |
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356 return buffer.toString(); |
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357 return buffer.toString(StringUtil.__ISO_8859_1_CHARSET); |
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358 } |
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359 } |