annotate src/org/eclipse/jetty/io/ByteArrayBuffer.java @ 1038:b71ad168fe34

rename Buffer.length() to remaining()
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 03 Nov 2016 22:16:11 -0600
parents 80cad9086593
children a7319f14ba1e
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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.io.IOException;
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22 import java.io.InputStream;
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23 import java.io.OutputStream;
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24 import java.io.UnsupportedEncodingException;
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25
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26 import org.eclipse.jetty.util.StringUtil;
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27
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28
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29 public class ByteArrayBuffer extends AbstractBuffer
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30 {
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31 // Set a maximum size to a write for the writeTo method, to ensure that very large content is not
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32 // written as a single write (which may fall foul to write timeouts if consumed slowly).
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33 final static int MAX_WRITE=Integer.getInteger("org.eclipse.jetty.io.ByteArrayBuffer.MAX_WRITE",128*1024);
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34 final protected byte[] _bytes;
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35
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36 protected ByteArrayBuffer(int size, int access)
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37 {
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38 this(new byte[size],0,0,access);
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39 }
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40
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41 public ByteArrayBuffer(byte[] bytes)
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42 {
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43 this(bytes, 0, bytes.length, READWRITE);
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44 }
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45
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46 public ByteArrayBuffer(byte[] bytes, int index, int length)
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47 {
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48 this(bytes, index, length, READWRITE);
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49 }
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50
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51 public ByteArrayBuffer(byte[] bytes, int index, int length, int access)
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52 {
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53 super(READWRITE);
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54 _bytes = bytes;
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55 setPutIndex(index + length);
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56 setGetIndex(index);
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57 _access = access;
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58 }
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59
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60 public ByteArrayBuffer(int size)
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61 {
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62 this(new byte[size], 0, 0, READWRITE);
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63 setPutIndex(0);
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64 }
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65
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66 public ByteArrayBuffer(String value)
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67 {
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68 super(READWRITE);
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69 _bytes = StringUtil.getBytes(value);
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70 setGetIndex(0);
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71 setPutIndex(_bytes.length);
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72 _access=IMMUTABLE;
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73 _string = value;
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74 }
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75
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76 @Override
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77 public final byte[] array()
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78 {
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79 return _bytes;
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80 }
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81
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82 @Override
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83 public final int capacity()
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84 {
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85 return _bytes.length;
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86 }
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87
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88 @Override
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89 public final void compact()
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90 {
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91 if (isReadOnly())
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92 throw new IllegalStateException(__READONLY);
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93 int s = markIndex() >= 0 ? markIndex() : getIndex();
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94 if (s > 0)
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95 {
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96 int length = putIndex() - s;
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97 if (length > 0)
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98 {
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99 System.arraycopy(_bytes, s,_bytes, 0, length);
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100 }
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101 if (markIndex() > 0) setMarkIndex(markIndex() - s);
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102 setGetIndex(getIndex() - s);
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103 setPutIndex(putIndex() - s);
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104 }
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105 }
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106
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107
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108 @Override
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109 public final boolean equals(Object obj)
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110 {
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111 if (obj==this)
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112 return true;
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113
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114 if (obj == null || !(obj instanceof Buffer))
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115 return false;
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116
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117
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118 Buffer b = (Buffer) obj;
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119
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120 // reject different lengths
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121 if (b.remaining() != remaining())
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122 return false;
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123
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124 // reject AbstractBuffer with different hash value
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125 if (_hash != 0 && obj instanceof AbstractBuffer)
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126 {
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127 AbstractBuffer ab = (AbstractBuffer) obj;
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128 if (ab._hash != 0 && _hash != ab._hash)
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129 return false;
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130 }
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131
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132 // Nothing for it but to do the hard grind.
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133 int get=getIndex();
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134 int bi=b.putIndex();
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135 for (int i = putIndex(); i-->get;)
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136 {
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137 byte b1 = _bytes[i];
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138 byte b2 = b.peek(--bi);
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139 if (b1 != b2) return false;
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140 }
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141 return true;
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142 }
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143
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144 @Override
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145 public final byte get()
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146 {
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147 return _bytes[_get++];
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148 }
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149
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150 @Override
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151 public final int hashCode()
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152 {
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153 if (_hash == 0 || _hashGet!=_get || _hashPut!=_put)
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154 {
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155 int get=getIndex();
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156 for (int i = putIndex(); i-- >get;)
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157 {
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158 byte b = _bytes[i];
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159 if ('a' <= b && b <= 'z')
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160 b = (byte) (b - 'a' + 'A');
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161 _hash = 31 * _hash + b;
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162 }
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163 if (_hash == 0)
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164 _hash = -1;
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165 _hashGet=_get;
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166 _hashPut=_put;
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167 }
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168 return _hash;
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169 }
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170
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171
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172 @Override
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173 public final byte peek(int index)
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174 {
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175 return _bytes[index];
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176 }
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177
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178 @Override
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179 public final int peek(int index, byte[] b, int offset, int length)
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180 {
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181 int l = length;
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182 if (index + l > capacity())
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183 {
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184 l = capacity() - index;
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185 if (l==0)
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186 return -1;
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187 }
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188
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189 if (l < 0)
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190 return -1;
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191
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192 System.arraycopy(_bytes, index, b, offset, l);
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193 return l;
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194 }
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195
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196 @Override
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197 public final void poke(int index, byte b)
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198 {
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199 /*
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200 if (isReadOnly())
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201 throw new IllegalStateException(__READONLY);
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202
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203 if (index < 0)
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204 throw new IllegalArgumentException("index<0: " + index + "<0");
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205 if (index > capacity())
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206 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
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207 */
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208 _bytes[index] = b;
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209 }
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210
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211 @Override
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212 public final int poke(int index, Buffer src)
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213 {
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214 _hash=0;
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215
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216 /*
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217 if (isReadOnly())
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218 throw new IllegalStateException(__READONLY);
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219 if (index < 0)
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220 throw new IllegalArgumentException("index<0: " + index + "<0");
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221 */
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222
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223 int length=src.remaining();
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224 if (index + length > capacity())
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225 {
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226 length=capacity()-index;
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227 /*
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228 if (length<0)
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229 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
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230 */
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231 }
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232
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233 byte[] src_array = src.array();
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234 if (src_array != null)
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235 System.arraycopy(src_array, src.getIndex(), _bytes, index, length);
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236 else
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237 {
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238 int s=src.getIndex();
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239 for (int i=0;i<length;i++)
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240 _bytes[index++]=src.peek(s++);
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241 }
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242
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243 return length;
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244 }
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245
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246
1010
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247 @Override
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248 public final int poke(int index, byte[] b, int offset, int length)
1010
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249 {
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250 _hash=0;
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251 /*
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252 if (isReadOnly())
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253 throw new IllegalStateException(__READONLY);
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254 if (index < 0)
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255 throw new IllegalArgumentException("index<0: " + index + "<0");
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256 */
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257
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258 if (index + length > capacity())
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259 {
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260 length=capacity()-index;
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261 /* if (length<0)
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262 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
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263 */
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264 }
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265
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266 System.arraycopy(b, offset, _bytes, index, length);
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267
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268 return length;
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269 }
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270
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271 @Override
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272 public final int readFrom(InputStream in,int max) throws IOException
1010
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273 {
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274 if (max<0||max>space())
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275 max=space();
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276 int p = putIndex();
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277
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278 int len=0, total=0, available=max;
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279 while (total<max)
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280 {
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281 len=in.read(_bytes,p,available);
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282 if (len<0)
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283 break;
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284 else if (len>0)
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285 {
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286 p += len;
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287 total += len;
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288 available -= len;
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289 setPutIndex(p);
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290 }
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diff changeset
291 if (in.available()<=0)
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292 break;
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diff changeset
293 }
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294 if (len<0 && total==0)
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295 return -1;
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296 return total;
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diff changeset
297 }
802
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298
1010
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diff changeset
299 @Override
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diff changeset
300 public final int space()
1010
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diff changeset
301 {
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302 return _bytes.length - _put;
2712133d5bce simplify Buffer code
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diff changeset
303 }
802
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parents:
diff changeset
304
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
305 }