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annotate src/org/eclipse/jetty/io/BufferUtil.java @ 1052:4a2489f1d5fe
remove JBuffer.peek()
| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Tue, 08 Nov 2016 00:27:16 -0700 |
| parents | 2b769da7f67d |
| children | 87275900646e |
| 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 |
| 1046 | 21 import java.nio.ByteBuffer; |
| 22 import org.eclipse.jetty.util.StringUtil; | |
| 23 | |
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24 |
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25 /* ------------------------------------------------------------------------------- */ |
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26 /** Buffer utility methods. |
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27 * |
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28 * |
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29 */ |
| 1018 | 30 public final class BufferUtil |
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31 { |
| 1018 | 32 static final byte SPACE= 0x20; |
| 33 static final byte MINUS= '-'; | |
| 34 static final byte[] DIGIT= | |
| 35 {(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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36 |
| 1018 | 37 /** |
| 38 * Convert buffer to an integer. | |
| 39 * Parses up to the first non-numeric character. If no number is found an | |
| 40 * IllegalArgumentException is thrown | |
| 41 * @param buffer A buffer containing an integer. The position is not changed. | |
| 42 * @return an int | |
| 43 */ | |
| 1048 | 44 public static int toInt(JBuffer buffer) |
| 1018 | 45 { |
| 46 int val= 0; | |
| 47 boolean started= false; | |
| 48 boolean minus= false; | |
| 49 for (int i= buffer.getIndex(); i < buffer.putIndex(); i++) | |
| 50 { | |
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51 byte b = buffer.get(i); |
| 1018 | 52 if (b <= SPACE) |
| 53 { | |
| 54 if (started) | |
| 55 break; | |
| 56 } | |
| 57 else if (b >= '0' && b <= '9') | |
| 58 { | |
| 59 val= val * 10 + (b - '0'); | |
| 60 started= true; | |
| 61 } | |
| 62 else if (b == MINUS && !started) | |
| 63 { | |
| 64 minus= true; | |
| 65 } | |
| 66 else | |
| 67 break; | |
| 68 } | |
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69 |
| 1018 | 70 if (started) |
| 71 return minus ? (-val) : val; | |
| 72 throw new NumberFormatException(buffer.toString()); | |
| 73 } | |
| 74 | |
| 75 /** | |
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76 * Convert string to an long. |
| 1018 | 77 * Parses up to the first non-numeric character. If no number is found an |
| 78 * IllegalArgumentException is thrown | |
| 79 */ | |
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80 public static long toLong(String s) |
| 1018 | 81 { |
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82 long val = 0; |
| 1018 | 83 boolean started= false; |
| 84 boolean minus= false; | |
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85 for (int i = 0; i < s.length(); i++) |
| 1018 | 86 { |
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87 char c = s.charAt(i); |
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88 if (c <= ' ') |
| 1018 | 89 { |
| 90 if (started) | |
| 91 break; | |
| 92 } | |
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93 else if (c >= '0' && c <= '9') |
| 1018 | 94 { |
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95 val= val * 10L + (c - '0'); |
| 1018 | 96 started= true; |
| 97 } | |
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98 else if (c == '-' && !started) |
| 1018 | 99 { |
| 100 minus= true; | |
| 101 } | |
| 102 else | |
| 103 break; | |
| 104 } | |
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105 |
| 1018 | 106 if (started) |
| 107 return minus ? (-val) : val; | |
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108 throw new NumberFormatException(s); |
| 1018 | 109 } |
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110 |
| 1048 | 111 public static void putHexInt(JBuffer buffer, int n) |
| 1018 | 112 { |
| 113 | |
| 114 if (n < 0) | |
| 115 { | |
| 116 buffer.put((byte)'-'); | |
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117 |
| 1018 | 118 if (n == Integer.MIN_VALUE) |
| 119 { | |
| 120 buffer.put((byte)(0x7f&'8')); | |
| 121 buffer.put((byte)(0x7f&'0')); | |
| 122 buffer.put((byte)(0x7f&'0')); | |
| 123 buffer.put((byte)(0x7f&'0')); | |
| 124 buffer.put((byte)(0x7f&'0')); | |
| 125 buffer.put((byte)(0x7f&'0')); | |
| 126 buffer.put((byte)(0x7f&'0')); | |
| 127 buffer.put((byte)(0x7f&'0')); | |
| 128 | |
| 129 return; | |
| 130 } | |
| 131 n= -n; | |
| 132 } | |
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133 |
| 1018 | 134 if (n < 0x10) |
| 135 { | |
| 136 buffer.put(DIGIT[n]); | |
| 137 } | |
| 138 else | |
| 139 { | |
| 140 boolean started= false; | |
| 141 // This assumes constant time int arithmatic | |
| 142 for (int i= 0; i < hexDivisors.length; i++) | |
| 143 { | |
| 144 if (n < hexDivisors[i]) | |
| 145 { | |
| 146 if (started) | |
| 147 buffer.put((byte)'0'); | |
| 148 continue; | |
| 149 } | |
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150 |
| 1018 | 151 started= true; |
| 152 int d= n / hexDivisors[i]; | |
| 153 buffer.put(DIGIT[d]); | |
| 154 n= n - d * hexDivisors[i]; | |
| 155 } | |
| 156 } | |
| 157 } | |
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158 |
| 1018 | 159 /* ------------------------------------------------------------ */ |
| 160 /** | |
| 161 * Add hex integer BEFORE current getIndex. | |
| 162 * @param buffer | |
| 163 * @param n | |
| 164 */ | |
| 1048 | 165 public static void prependHexInt(JBuffer buffer, int n) |
| 1018 | 166 { |
| 167 if (n==0) | |
| 168 { | |
| 169 int gi=buffer.getIndex(); | |
| 170 buffer.poke(--gi,(byte)'0'); | |
| 171 buffer.setGetIndex(gi); | |
| 172 } | |
| 173 else | |
| 174 { | |
| 175 boolean minus=false; | |
| 176 if (n<0) | |
| 177 { | |
| 178 minus=true; | |
| 179 n=-n; | |
| 180 } | |
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181 |
| 1018 | 182 int gi=buffer.getIndex(); |
| 183 while(n>0) | |
| 184 { | |
| 185 int d = 0xf&n; | |
| 186 n=n>>4; | |
| 187 buffer.poke(--gi,DIGIT[d]); | |
| 188 } | |
| 189 | |
| 190 if (minus) | |
| 191 buffer.poke(--gi,(byte)'-'); | |
| 192 buffer.setGetIndex(gi); | |
| 193 } | |
| 194 } | |
| 195 | |
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196 |
| 1048 | 197 public static void putDecLong(JBuffer buffer, long n) |
| 1018 | 198 { |
| 199 if (n < 0) | |
| 200 { | |
| 201 buffer.put((byte)'-'); | |
| 202 | |
| 203 if (n == Long.MIN_VALUE) | |
| 204 { | |
| 205 buffer.put((byte)'9'); | |
| 206 n= 223372036854775808L; | |
| 207 } | |
| 208 else | |
| 209 n= -n; | |
| 210 } | |
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211 |
| 1018 | 212 if (n < 10) |
| 213 { | |
| 214 buffer.put(DIGIT[(int)n]); | |
| 215 } | |
| 216 else | |
| 217 { | |
| 218 boolean started= false; | |
| 219 // This assumes constant time int arithmatic | |
| 220 for (int i= 0; i < decDivisorsL.length; i++) | |
| 221 { | |
| 222 if (n < decDivisorsL[i]) | |
| 223 { | |
| 224 if (started) | |
| 225 buffer.put((byte)'0'); | |
| 226 continue; | |
| 227 } | |
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228 |
| 1018 | 229 started= true; |
| 230 long d= n / decDivisorsL[i]; | |
| 231 buffer.put(DIGIT[(int)d]); | |
| 232 n= n - d * decDivisorsL[i]; | |
| 233 } | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 private final static int[] hexDivisors= | |
| 238 { | |
| 239 0x10000000, | |
| 240 0x1000000, | |
| 241 0x100000, | |
| 242 0x10000, | |
| 243 0x1000, | |
| 244 0x100, | |
| 245 0x10, | |
| 246 0x1 | |
| 247 }; | |
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248 |
| 1018 | 249 private final static long[] decDivisorsL= |
| 250 { | |
| 251 1000000000000000000L, | |
| 252 100000000000000000L, | |
| 253 10000000000000000L, | |
| 254 1000000000000000L, | |
| 255 100000000000000L, | |
| 256 10000000000000L, | |
| 257 1000000000000L, | |
| 258 100000000000L, | |
| 259 10000000000L, | |
| 260 1000000000L, | |
| 261 100000000L, | |
| 262 10000000L, | |
| 263 1000000L, | |
| 264 100000L, | |
| 265 10000L, | |
| 266 1000L, | |
| 267 100L, | |
| 268 10L, | |
| 269 1L | |
| 270 }; | |
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271 |
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272 |
| 1048 | 273 public static void putCRLF(JBuffer buffer) |
| 1018 | 274 { |
| 275 buffer.put((byte)13); | |
| 276 buffer.put((byte)10); | |
| 277 } | |
| 1021 | 278 |
| 1046 | 279 |
| 1048 | 280 public static final JBuffer EMPTY_BUFFER = new JBuffer(ByteBuffer.allocate(0)); |
| 1046 | 281 |
| 1048 | 282 public static JBuffer wrap(byte[] array,int offset,int length) { |
| 1046 | 283 return new JBuffer(ByteBuffer.wrap(array,offset,length)); |
| 284 } | |
| 285 | |
| 1048 | 286 public static JBuffer wrap(byte[] array) { |
| 1046 | 287 return new JBuffer(ByteBuffer.wrap(array)); |
| 288 } | |
| 289 | |
| 1048 | 290 public static JBuffer wrap(String s) { |
| 1046 | 291 byte[] bytes = StringUtil.getBytes(s); |
| 292 ByteBuffer bb = ByteBuffer.wrap(bytes).asReadOnlyBuffer(); | |
| 293 return new JBuffer(bb); | |
| 294 } | |
| 295 | |
| 1048 | 296 public static JBuffer newBuffer(int size) { |
| 1046 | 297 ByteBuffer bb = ByteBuffer.allocate(size); |
| 298 bb.limit(0); | |
| 299 return new JBuffer(bb); | |
| 300 } | |
| 301 | |
| 1048 | 302 public static JBuffer newDirectBuffer(int size) { |
| 1046 | 303 ByteBuffer bb = ByteBuffer.allocateDirect(size); |
| 304 bb.limit(0); | |
| 305 return new JBuffer(bb); | |
| 306 } | |
| 307 | |
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308 } |