Mercurial Hosting > luan
annotate src/org/eclipse/jetty/io/BufferUtil.java @ 1061:c880589715c7
remove JBuffer.setGetIndex()
| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Tue, 08 Nov 2016 05:54:53 -0700 |
| parents | 013939bfc9e8 |
| children | 158d1e6ac17f |
| 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; |
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22 import java.nio.charset.Charset; |
| 1046 | 23 import org.eclipse.jetty.util.StringUtil; |
| 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 */ |
| 1018 | 31 public final class BufferUtil |
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32 { |
| 1056 | 33 private static final byte[] DIGIT= |
| 1018 | 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 |
| 1018 | 36 |
| 37 /** | |
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38 * Convert string to an long. |
| 1018 | 39 * Parses up to the first non-numeric character. If no number is found an |
| 40 * IllegalArgumentException is thrown | |
| 41 */ | |
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42 public static long toLong(String s) |
| 1018 | 43 { |
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44 long val = 0; |
| 1018 | 45 boolean started= false; |
| 46 boolean minus= false; | |
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47 for (int i = 0; i < s.length(); i++) |
| 1018 | 48 { |
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49 char c = s.charAt(i); |
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50 if (c <= ' ') |
| 1018 | 51 { |
| 52 if (started) | |
| 53 break; | |
| 54 } | |
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55 else if (c >= '0' && c <= '9') |
| 1018 | 56 { |
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57 val= val * 10L + (c - '0'); |
| 1018 | 58 started= true; |
| 59 } | |
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60 else if (c == '-' && !started) |
| 1018 | 61 { |
| 62 minus= true; | |
| 63 } | |
| 64 else | |
| 65 break; | |
| 66 } | |
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67 |
| 1018 | 68 if (started) |
| 69 return minus ? (-val) : val; | |
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70 throw new NumberFormatException(s); |
| 1018 | 71 } |
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72 |
| 1048 | 73 public static void putHexInt(JBuffer buffer, int n) |
| 1018 | 74 { |
| 75 | |
| 76 if (n < 0) | |
| 77 { | |
| 78 buffer.put((byte)'-'); | |
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79 |
| 1018 | 80 if (n == Integer.MIN_VALUE) |
| 81 { | |
| 82 buffer.put((byte)(0x7f&'8')); | |
| 83 buffer.put((byte)(0x7f&'0')); | |
| 84 buffer.put((byte)(0x7f&'0')); | |
| 85 buffer.put((byte)(0x7f&'0')); | |
| 86 buffer.put((byte)(0x7f&'0')); | |
| 87 buffer.put((byte)(0x7f&'0')); | |
| 88 buffer.put((byte)(0x7f&'0')); | |
| 89 buffer.put((byte)(0x7f&'0')); | |
| 90 | |
| 91 return; | |
| 92 } | |
| 93 n= -n; | |
| 94 } | |
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95 |
| 1018 | 96 if (n < 0x10) |
| 97 { | |
| 98 buffer.put(DIGIT[n]); | |
| 99 } | |
| 100 else | |
| 101 { | |
| 102 boolean started= false; | |
| 103 // This assumes constant time int arithmatic | |
| 104 for (int i= 0; i < hexDivisors.length; i++) | |
| 105 { | |
| 106 if (n < hexDivisors[i]) | |
| 107 { | |
| 108 if (started) | |
| 109 buffer.put((byte)'0'); | |
| 110 continue; | |
| 111 } | |
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112 |
| 1018 | 113 started= true; |
| 1056 | 114 int d = n / hexDivisors[i]; |
| 1018 | 115 buffer.put(DIGIT[d]); |
| 116 n= n - d * hexDivisors[i]; | |
| 117 } | |
| 118 } | |
| 119 } | |
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120 |
| 1048 | 121 public static void putDecLong(JBuffer buffer, long n) |
| 1018 | 122 { |
| 123 if (n < 0) | |
| 124 { | |
| 125 buffer.put((byte)'-'); | |
| 126 | |
| 127 if (n == Long.MIN_VALUE) | |
| 128 { | |
| 129 buffer.put((byte)'9'); | |
| 1056 | 130 n = 223372036854775808L; |
| 1018 | 131 } |
| 132 else | |
| 1056 | 133 n = -n; |
| 1018 | 134 } |
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135 |
| 1018 | 136 if (n < 10) |
| 137 { | |
| 138 buffer.put(DIGIT[(int)n]); | |
| 139 } | |
| 140 else | |
| 141 { | |
| 142 boolean started= false; | |
| 143 // This assumes constant time int arithmatic | |
| 144 for (int i= 0; i < decDivisorsL.length; i++) | |
| 145 { | |
| 146 if (n < decDivisorsL[i]) | |
| 147 { | |
| 148 if (started) | |
| 149 buffer.put((byte)'0'); | |
| 150 continue; | |
| 151 } | |
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152 |
| 1018 | 153 started= true; |
| 154 long d= n / decDivisorsL[i]; | |
| 155 buffer.put(DIGIT[(int)d]); | |
| 156 n= n - d * decDivisorsL[i]; | |
| 157 } | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 private final static int[] hexDivisors= | |
| 162 { | |
| 163 0x10000000, | |
| 164 0x1000000, | |
| 165 0x100000, | |
| 166 0x10000, | |
| 167 0x1000, | |
| 168 0x100, | |
| 169 0x10, | |
| 170 0x1 | |
| 171 }; | |
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172 |
| 1018 | 173 private final static long[] decDivisorsL= |
| 174 { | |
| 175 1000000000000000000L, | |
| 176 100000000000000000L, | |
| 177 10000000000000000L, | |
| 178 1000000000000000L, | |
| 179 100000000000000L, | |
| 180 10000000000000L, | |
| 181 1000000000000L, | |
| 182 100000000000L, | |
| 183 10000000000L, | |
| 184 1000000000L, | |
| 185 100000000L, | |
| 186 10000000L, | |
| 187 1000000L, | |
| 188 100000L, | |
| 189 10000L, | |
| 190 1000L, | |
| 191 100L, | |
| 192 10L, | |
| 193 1L | |
| 194 }; | |
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195 |
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196 |
| 1048 | 197 public static void putCRLF(JBuffer buffer) |
| 1018 | 198 { |
| 199 buffer.put((byte)13); | |
| 200 buffer.put((byte)10); | |
| 201 } | |
| 1021 | 202 |
| 1046 | 203 |
| 1048 | 204 public static final JBuffer EMPTY_BUFFER = new JBuffer(ByteBuffer.allocate(0)); |
| 1046 | 205 |
| 1048 | 206 public static JBuffer wrap(byte[] array,int offset,int length) { |
| 1046 | 207 return new JBuffer(ByteBuffer.wrap(array,offset,length)); |
| 208 } | |
| 209 | |
| 1048 | 210 public static JBuffer wrap(byte[] array) { |
| 1046 | 211 return new JBuffer(ByteBuffer.wrap(array)); |
| 212 } | |
| 213 | |
| 1048 | 214 public static JBuffer wrap(String s) { |
| 1046 | 215 byte[] bytes = StringUtil.getBytes(s); |
| 216 ByteBuffer bb = ByteBuffer.wrap(bytes).asReadOnlyBuffer(); | |
| 217 return new JBuffer(bb); | |
| 218 } | |
| 219 | |
| 1048 | 220 public static JBuffer newBuffer(int size) { |
| 1046 | 221 ByteBuffer bb = ByteBuffer.allocate(size); |
| 222 bb.limit(0); | |
| 223 return new JBuffer(bb); | |
| 224 } | |
| 225 | |
| 1048 | 226 public static JBuffer newDirectBuffer(int size) { |
| 1046 | 227 ByteBuffer bb = ByteBuffer.allocateDirect(size); |
| 228 bb.limit(0); | |
| 229 return new JBuffer(bb); | |
| 230 } | |
| 231 | |
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232 |
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233 |
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234 private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1"); |
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235 |
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236 public static String getString(JBuffer buffer) { |
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237 byte[] bytes = new byte[buffer.remaining()]; |
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238 buffer.get(bytes); |
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239 return new String(bytes,ISO_8859_1); |
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240 } |
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241 } |