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annotate src/org/eclipse/jetty/io/BufferUtil.java @ 1068:9d357b9e4bcb

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fix BufferUtil.newBuffer()
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 10 Nov 2016 00:23:05 -0700
parents bbbda7c6e8ec
children 6b7ff30bb990
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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 java.nio.ByteBuffer;
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22 import java.nio.charset.Charset;
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23 import org.eclipse.jetty.util.StringUtil;
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24
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25
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26 /* ------------------------------------------------------------------------------- */
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27 /** Buffer utility methods.
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28 *
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29 *
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30 */
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31 public final class BufferUtil
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32 {
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33 private 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 /**
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38 * Convert string to an long.
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39 * Parses up to the first non-numeric character. If no number is found an
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40 * IllegalArgumentException is thrown
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41 */
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42 public static long toLong(String s)
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43 {
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44 long val = 0;
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45 boolean started= false;
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46 boolean minus= false;
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47 for (int i = 0; i < s.length(); i++)
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48 {
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49 char c = s.charAt(i);
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50 if (c <= ' ')
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51 {
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52 if (started)
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53 break;
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54 }
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55 else if (c >= '0' && c <= '9')
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56 {
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57 val= val * 10L + (c - '0');
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58 started= true;
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59 }
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60 else if (c == '-' && !started)
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61 {
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62 minus= true;
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63 }
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64 else
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65 break;
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66 }
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67
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68 if (started)
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69 return minus ? (-val) : val;
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70 throw new NumberFormatException(s);
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71 }
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72
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73 public static void putHexInt(JBuffer buffer, int n)
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74 {
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75
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76 if (n < 0)
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77 {
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78 buffer.putQ((byte)'-');
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79
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80 if (n == Integer.MIN_VALUE)
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81 {
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82 buffer.putQ((byte)(0x7f&'8'));
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83 buffer.putQ((byte)(0x7f&'0'));
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84 buffer.putQ((byte)(0x7f&'0'));
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85 buffer.putQ((byte)(0x7f&'0'));
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86 buffer.putQ((byte)(0x7f&'0'));
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87 buffer.putQ((byte)(0x7f&'0'));
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88 buffer.putQ((byte)(0x7f&'0'));
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89 buffer.putQ((byte)(0x7f&'0'));
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90
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91 return;
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92 }
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93 n= -n;
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94 }
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95
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96 if (n < 0x10)
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97 {
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98 buffer.putQ(DIGIT[n]);
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99 }
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100 else
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101 {
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102 boolean started= false;
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103 // This assumes constant time int arithmatic
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104 for (int i= 0; i < hexDivisors.length; i++)
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105 {
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106 if (n < hexDivisors[i])
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107 {
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108 if (started)
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109 buffer.putQ((byte)'0');
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110 continue;
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111 }
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112
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113 started= true;
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114 int d = n / hexDivisors[i];
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115 buffer.putQ(DIGIT[d]);
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116 n= n - d * hexDivisors[i];
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117 }
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118 }
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119 }
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120
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121 public static void putDecLong(JBuffer buffer, long n)
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122 {
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123 if (n < 0)
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124 {
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125 buffer.putQ((byte)'-');
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126
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127 if (n == Long.MIN_VALUE)
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128 {
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129 buffer.putQ((byte)'9');
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130 n = 223372036854775808L;
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131 }
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132 else
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133 n = -n;
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134 }
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135
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136 if (n < 10)
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137 {
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138 buffer.putQ(DIGIT[(int)n]);
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139 }
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140 else
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141 {
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142 boolean started= false;
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143 // This assumes constant time int arithmatic
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144 for (int i= 0; i < decDivisorsL.length; i++)
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145 {
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146 if (n < decDivisorsL[i])
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147 {
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148 if (started)
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149 buffer.putQ((byte)'0');
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150 continue;
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151 }
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152
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153 started= true;
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154 long d= n / decDivisorsL[i];
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155 buffer.putQ(DIGIT[(int)d]);
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156 n= n - d * decDivisorsL[i];
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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 private final static int[] hexDivisors=
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162 {
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163 0x10000000,
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parents: 802
diff changeset
164 0x1000000,
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diff changeset
165 0x100000,
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diff changeset
166 0x10000,
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diff changeset
167 0x1000,
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diff changeset
168 0x100,
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diff changeset
169 0x10,
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diff changeset
170 0x1
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171 };
802
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172
1018
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173 private final static long[] decDivisorsL=
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174 {
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175 1000000000000000000L,
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diff changeset
176 100000000000000000L,
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diff changeset
177 10000000000000000L,
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diff changeset
178 1000000000000000L,
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diff changeset
179 100000000000000L,
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diff changeset
180 10000000000000L,
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diff changeset
181 1000000000000L,
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diff changeset
182 100000000000L,
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diff changeset
183 10000000000L,
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184 1000000000L,
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185 100000000L,
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diff changeset
186 10000000L,
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187 1000000L,
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188 100000L,
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189 10000L,
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190 1000L,
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191 100L,
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192 10L,
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193 1L
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194 };
802
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195
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196
1046
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197
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198 public static final JBuffer EMPTY_BUFFER = new JBuffer(ByteBuffer.allocate(0));
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199
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200 public static JBuffer wrap(byte[] array,int offset,int length) {
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201 return new JBuffer(ByteBuffer.wrap(array,offset,length));
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202 }
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203
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204 public static JBuffer wrap(byte[] array) {
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205 return new JBuffer(ByteBuffer.wrap(array));
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206 }
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207
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208 public static JBuffer wrap(String s) {
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209 byte[] bytes = StringUtil.getBytes(s);
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210 ByteBuffer bb = ByteBuffer.wrap(bytes).asReadOnlyBuffer();
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211 return new JBuffer(bb);
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212 }
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213
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214 public static JBuffer newBuffer(int size) {
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215 ByteBuffer bb = ByteBuffer.allocate(size);
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216 return new JBuffer(bb);
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217 }
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218
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219 public static JBuffer newDirectBuffer(int size) {
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220 ByteBuffer bb = ByteBuffer.allocateDirect(size);
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221 return new JBuffer(bb);
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222 }
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223
1054
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224
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225
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226 private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
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227
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228 public static String getString(JBuffer buffer) {
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229 byte[] bytes = new byte[buffer.remaining()];
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230 buffer.get(bytes);
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231 return new String(bytes,ISO_8859_1);
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232 }
1065
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233
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234 public static void compact(JBuffer buffer) {
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235 buffer.compact();
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236 buffer.limit(buffer.position());
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237 buffer.position(0);
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238 }
802
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239 }