Mercurial Hosting > luan
annotate src/org/eclipse/jetty/server/HttpWriter.java @ 941:c948f674a2d5
simplify Timeout
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 11 Oct 2016 00:34:19 -0600 |
parents | 3428c60d7cfc |
children | 23ec25435b8c |
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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.server; |
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20 |
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21 import java.io.IOException; |
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22 import java.io.OutputStreamWriter; |
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23 import java.io.Writer; |
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24 |
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25 import org.eclipse.jetty.http.AbstractGenerator; |
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26 import org.eclipse.jetty.util.ByteArrayOutputStream2; |
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27 import org.eclipse.jetty.util.StringUtil; |
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28 |
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29 /** OutputWriter. |
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30 * A writer that can wrap a {@link HttpOutput} stream and provide |
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31 * character encodings. |
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32 * |
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33 * The UTF-8 encoding is done by this class and no additional |
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34 * buffers or Writers are used. |
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35 * The UTF-8 code was inspired by http://javolution.org |
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36 */ |
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37 public class HttpWriter extends Writer |
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38 { |
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39 public static final int MAX_OUTPUT_CHARS = 512; |
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40 |
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41 private static final int WRITE_CONV = 0; |
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42 private static final int WRITE_ISO1 = 1; |
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43 private static final int WRITE_UTF8 = 2; |
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44 |
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45 final HttpOutput _out; |
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46 final AbstractGenerator _generator; |
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47 int _writeMode; |
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48 int _surrogate; |
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49 |
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50 /* ------------------------------------------------------------ */ |
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51 public HttpWriter(HttpOutput out) |
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52 { |
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53 _out=out; |
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54 _generator=_out._generator; |
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55 _surrogate=0; // AS lastUTF16CodePoint |
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56 } |
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57 |
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58 /* ------------------------------------------------------------ */ |
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59 public void setCharacterEncoding(String encoding) |
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60 { |
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61 if (encoding == null || StringUtil.__ISO_8859_1.equalsIgnoreCase(encoding)) |
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62 { |
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63 _writeMode = WRITE_ISO1; |
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64 } |
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65 else if (StringUtil.__UTF8.equalsIgnoreCase(encoding)) |
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66 { |
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67 _writeMode = WRITE_UTF8; |
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68 } |
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69 else |
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70 { |
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71 _writeMode = WRITE_CONV; |
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72 if (_out._characterEncoding == null || !_out._characterEncoding.equalsIgnoreCase(encoding)) |
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73 _out._converter = null; // Set lazily in getConverter() |
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74 } |
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75 |
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76 _out._characterEncoding = encoding; |
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77 if (_out._bytes==null) |
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78 _out._bytes = new ByteArrayOutputStream2(MAX_OUTPUT_CHARS); |
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79 } |
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80 |
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81 /* ------------------------------------------------------------ */ |
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82 @Override |
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83 public void close() throws IOException |
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84 { |
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85 _out.close(); |
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86 } |
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87 |
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88 /* ------------------------------------------------------------ */ |
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89 @Override |
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90 public void flush() throws IOException |
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91 { |
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92 _out.flush(); |
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93 } |
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94 |
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95 /* ------------------------------------------------------------ */ |
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96 @Override |
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97 public void write (String s,int offset, int length) throws IOException |
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98 { |
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99 while (length > MAX_OUTPUT_CHARS) |
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100 { |
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101 write(s, offset, MAX_OUTPUT_CHARS); |
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102 offset += MAX_OUTPUT_CHARS; |
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103 length -= MAX_OUTPUT_CHARS; |
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104 } |
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105 |
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106 if (_out._chars==null) |
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107 { |
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108 _out._chars = new char[MAX_OUTPUT_CHARS]; |
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109 } |
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110 char[] chars = _out._chars; |
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111 s.getChars(offset, offset + length, chars, 0); |
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112 write(chars, 0, length); |
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113 } |
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114 |
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115 /* ------------------------------------------------------------ */ |
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116 @Override |
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117 public void write (char[] s,int offset, int length) throws IOException |
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118 { |
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119 HttpOutput out = _out; |
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120 |
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121 while (length > 0) |
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122 { |
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123 out._bytes.reset(); |
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124 int chars = length>MAX_OUTPUT_CHARS?MAX_OUTPUT_CHARS:length; |
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125 |
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126 switch (_writeMode) |
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127 { |
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128 case WRITE_CONV: |
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129 { |
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130 Writer converter=getConverter(); |
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131 converter.write(s, offset, chars); |
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132 converter.flush(); |
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133 } |
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134 break; |
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135 |
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136 case WRITE_ISO1: |
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137 { |
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138 byte[] buffer=out._bytes.getBuf(); |
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139 int bytes=out._bytes.getCount(); |
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140 |
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141 if (chars>buffer.length-bytes) |
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142 chars=buffer.length-bytes; |
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143 |
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144 for (int i = 0; i < chars; i++) |
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145 { |
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146 int c = s[offset+i]; |
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147 buffer[bytes++]=(byte)(c<256?c:'?'); // ISO-1 and UTF-8 match for 0 - 255 |
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148 } |
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149 if (bytes>=0) |
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150 out._bytes.setCount(bytes); |
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151 |
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152 break; |
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153 } |
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154 |
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155 case WRITE_UTF8: |
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156 { |
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157 byte[] buffer=out._bytes.getBuf(); |
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158 int bytes=out._bytes.getCount(); |
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159 |
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160 if (bytes+chars>buffer.length) |
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161 chars=buffer.length-bytes; |
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162 |
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163 for (int i = 0; i < chars; i++) |
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164 { |
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165 int code = s[offset+i]; |
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166 |
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167 // Do we already have a surrogate? |
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168 if(_surrogate==0) |
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169 { |
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170 // No - is this char code a surrogate? |
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171 if(Character.isHighSurrogate((char)code)) |
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172 { |
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173 _surrogate=code; // UCS-? |
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174 continue; |
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175 } |
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176 } |
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177 // else handle a low surrogate |
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178 else if(Character.isLowSurrogate((char)code)) |
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179 { |
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180 code = Character.toCodePoint((char)_surrogate, (char)code); // UCS-4 |
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181 } |
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182 // else UCS-2 |
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183 else |
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184 { |
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185 code=_surrogate; // UCS-2 |
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186 _surrogate=0; // USED |
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187 i--; |
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188 } |
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189 |
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190 if ((code & 0xffffff80) == 0) |
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191 { |
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192 // 1b |
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193 if (bytes>=buffer.length) |
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194 { |
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195 chars=i; |
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196 break; |
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197 } |
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198 buffer[bytes++]=(byte)(code); |
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199 } |
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200 else |
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201 { |
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202 if((code&0xfffff800)==0) |
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203 { |
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204 // 2b |
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205 if (bytes+2>buffer.length) |
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206 { |
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207 chars=i; |
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208 break; |
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209 } |
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210 buffer[bytes++]=(byte)(0xc0|(code>>6)); |
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211 buffer[bytes++]=(byte)(0x80|(code&0x3f)); |
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212 } |
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213 else if((code&0xffff0000)==0) |
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214 { |
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215 // 3b |
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216 if (bytes+3>buffer.length) |
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217 { |
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218 chars=i; |
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219 break; |
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220 } |
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221 buffer[bytes++]=(byte)(0xe0|(code>>12)); |
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222 buffer[bytes++]=(byte)(0x80|((code>>6)&0x3f)); |
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223 buffer[bytes++]=(byte)(0x80|(code&0x3f)); |
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224 } |
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225 else if((code&0xff200000)==0) |
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226 { |
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227 // 4b |
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228 if (bytes+4>buffer.length) |
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229 { |
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230 chars=i; |
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231 break; |
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232 } |
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233 buffer[bytes++]=(byte)(0xf0|(code>>18)); |
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234 buffer[bytes++]=(byte)(0x80|((code>>12)&0x3f)); |
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235 buffer[bytes++]=(byte)(0x80|((code>>6)&0x3f)); |
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236 buffer[bytes++]=(byte)(0x80|(code&0x3f)); |
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237 } |
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238 else if((code&0xf4000000)==0) |
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239 { |
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240 // 5b |
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241 if (bytes+5>buffer.length) |
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242 { |
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243 chars=i; |
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244 break; |
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245 } |
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246 buffer[bytes++]=(byte)(0xf8|(code>>24)); |
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247 buffer[bytes++]=(byte)(0x80|((code>>18)&0x3f)); |
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248 buffer[bytes++]=(byte)(0x80|((code>>12)&0x3f)); |
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249 buffer[bytes++]=(byte)(0x80|((code>>6)&0x3f)); |
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250 buffer[bytes++]=(byte)(0x80|(code&0x3f)); |
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251 } |
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252 else if((code&0x80000000)==0) |
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253 { |
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254 // 6b |
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255 if (bytes+6>buffer.length) |
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256 { |
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257 chars=i; |
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258 break; |
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259 } |
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260 buffer[bytes++]=(byte)(0xfc|(code>>30)); |
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261 buffer[bytes++]=(byte)(0x80|((code>>24)&0x3f)); |
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262 buffer[bytes++]=(byte)(0x80|((code>>18)&0x3f)); |
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263 buffer[bytes++]=(byte)(0x80|((code>>12)&0x3f)); |
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264 buffer[bytes++]=(byte)(0x80|((code>>6)&0x3f)); |
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265 buffer[bytes++]=(byte)(0x80|(code&0x3f)); |
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266 } |
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267 else |
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268 { |
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269 buffer[bytes++]=(byte)('?'); |
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270 } |
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271 |
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272 _surrogate=0; // USED |
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273 |
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274 if (bytes==buffer.length) |
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275 { |
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276 chars=i+1; |
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277 break; |
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278 } |
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279 } |
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280 } |
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281 out._bytes.setCount(bytes); |
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282 break; |
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283 } |
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284 default: |
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285 throw new IllegalStateException(); |
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286 } |
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287 |
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288 out._bytes.writeTo(out); |
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289 length-=chars; |
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290 offset+=chars; |
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291 } |
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292 } |
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293 |
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294 |
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295 /* ------------------------------------------------------------ */ |
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296 private Writer getConverter() throws IOException |
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297 { |
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298 if (_out._converter == null) |
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299 _out._converter = new OutputStreamWriter(_out._bytes, _out._characterEncoding); |
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300 return _out._converter; |
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301 } |
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302 } |