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annotate src/org/eclipse/jetty/io/AbstractBuffer.java @ 1023:27f3dc761452
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| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Tue, 01 Nov 2016 03:44:46 -0600 |
| parents | 6be43ef1eb96 |
| children | 6647dbc8be71 |
| 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.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.nio.charset.Charset; |
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25 |
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26 import org.eclipse.jetty.util.TypeUtil; |
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27 import org.slf4j.Logger; |
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28 import org.slf4j.LoggerFactory; |
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29 |
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30 /** |
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31 * |
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32 * |
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33 */ |
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34 public abstract class AbstractBuffer implements Buffer |
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35 { |
| 1005 | 36 private static final Logger LOG = LoggerFactory.getLogger(AbstractBuffer.class); |
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37 |
| 1005 | 38 private final static boolean __boundsChecking = Boolean.getBoolean("org.eclipse.jetty.io.AbstractBuffer.boundsChecking"); |
| 39 | |
| 40 protected final static String | |
| 41 __IMMUTABLE = "IMMUTABLE", | |
| 42 __READONLY = "READONLY", | |
| 43 __READWRITE = "READWRITE", | |
| 44 __VOLATILE = "VOLATILE"; | |
| 45 | |
| 46 protected int _access; | |
| 47 protected boolean _volatile; | |
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48 |
| 1005 | 49 protected int _get; |
| 50 protected int _put; | |
| 51 protected int _hash; | |
| 52 protected int _hashGet; | |
| 53 protected int _hashPut; | |
| 54 protected int _mark; | |
| 55 protected String _string; | |
| 56 protected View _view; | |
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57 |
| 1005 | 58 /** |
| 59 * Constructor for BufferView | |
| 60 * | |
| 61 * @param access 0==IMMUTABLE, 1==READONLY, 2==READWRITE | |
| 62 */ | |
| 63 public AbstractBuffer(int access, boolean isVolatile) | |
| 64 { | |
| 65 if (access == IMMUTABLE && isVolatile) | |
| 66 throw new IllegalArgumentException("IMMUTABLE && VOLATILE"); | |
| 67 setMarkIndex(-1); | |
| 68 _access = access; | |
| 69 _volatile = isVolatile; | |
| 70 } | |
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71 |
| 1005 | 72 /* |
| 73 * @see org.eclipse.io.Buffer#toArray() | |
| 74 */ | |
| 75 public byte[] asArray() | |
| 76 { | |
| 77 byte[] bytes = new byte[length()]; | |
| 78 byte[] array = array(); | |
| 79 if (array != null) | |
| 80 System.arraycopy(array, getIndex(), bytes, 0, bytes.length); | |
| 81 else | |
| 82 peek(getIndex(), bytes, 0, length()); | |
| 83 return bytes; | |
| 84 } | |
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85 |
| 1005 | 86 private ByteArrayBuffer duplicate(int access) |
| 87 { | |
| 88 Buffer b=this.buffer(); | |
| 89 if (this instanceof Buffer.CaseInsensitve || b instanceof Buffer.CaseInsensitve) | |
| 90 return new ByteArrayBuffer.CaseInsensitive(asArray(), 0, length(),access); | |
| 91 else | |
| 92 return new ByteArrayBuffer(asArray(), 0, length(), access); | |
| 93 } | |
| 94 | |
| 95 public Buffer asImmutableBuffer() | |
| 96 { | |
| 97 if (isImmutable()) return this; | |
| 98 return duplicate(IMMUTABLE); | |
| 99 } | |
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100 |
| 1005 | 101 /* |
| 102 * @see org.eclipse.util.Buffer#asReadOnlyBuffer() | |
| 103 */ | |
| 104 public Buffer asReadOnlyBuffer() | |
| 105 { | |
| 106 if (isReadOnly()) return this; | |
| 107 return new View(this, markIndex(), getIndex(), putIndex(), READONLY); | |
| 108 } | |
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109 |
| 1005 | 110 public Buffer buffer() |
| 111 { | |
| 112 return this; | |
| 113 } | |
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114 |
| 1005 | 115 public void clear() |
| 116 { | |
| 117 setMarkIndex(-1); | |
| 118 setGetIndex(0); | |
| 119 setPutIndex(0); | |
| 120 } | |
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121 |
| 1005 | 122 public void compact() |
| 123 { | |
| 124 if (isReadOnly()) throw new IllegalStateException(__READONLY); | |
| 125 int s = markIndex() >= 0 ? markIndex() : getIndex(); | |
| 126 if (s > 0) | |
| 127 { | |
| 128 byte array[] = array(); | |
| 129 int length = putIndex() - s; | |
| 130 if (length > 0) | |
| 131 { | |
| 132 if (array != null) | |
| 133 System.arraycopy(array(), s, array(), 0, length); | |
| 134 else | |
| 135 poke(0, peek(s, length)); | |
| 136 } | |
| 137 if (markIndex() > 0) setMarkIndex(markIndex() - s); | |
| 138 setGetIndex(getIndex() - s); | |
| 139 setPutIndex(putIndex() - s); | |
| 140 } | |
| 141 } | |
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142 |
| 1005 | 143 @Override |
| 144 public boolean equals(Object obj) | |
| 145 { | |
| 146 if (obj==this) | |
| 147 return true; | |
| 148 | |
| 149 // reject non buffers; | |
| 150 if (obj == null || !(obj instanceof Buffer)) return false; | |
| 151 Buffer b = (Buffer) obj; | |
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152 |
| 1005 | 153 if (this instanceof Buffer.CaseInsensitve || b instanceof Buffer.CaseInsensitve) |
| 154 return equalsIgnoreCase(b); | |
| 155 | |
| 156 // reject different lengths | |
| 157 if (b.length() != length()) return false; | |
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158 |
| 1005 | 159 // reject AbstractBuffer with different hash value |
| 160 if (_hash != 0 && obj instanceof AbstractBuffer) | |
| 161 { | |
| 162 AbstractBuffer ab = (AbstractBuffer) obj; | |
| 163 if (ab._hash != 0 && _hash != ab._hash) return false; | |
| 164 } | |
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165 |
| 1005 | 166 // Nothing for it but to do the hard grind. |
| 167 int get=getIndex(); | |
| 168 int bi=b.putIndex(); | |
| 169 for (int i = putIndex(); i-->get;) | |
| 170 { | |
| 171 byte b1 = peek(i); | |
| 172 byte b2 = b.peek(--bi); | |
| 173 if (b1 != b2) return false; | |
| 174 } | |
| 175 return true; | |
| 176 } | |
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177 |
| 1005 | 178 public boolean equalsIgnoreCase(Buffer b) |
| 179 { | |
| 180 if (b==this) | |
| 181 return true; | |
| 182 | |
| 183 // reject different lengths | |
| 184 if (b.length() != length()) return false; | |
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185 |
| 1005 | 186 // reject AbstractBuffer with different hash value |
| 187 if (_hash != 0 && b instanceof AbstractBuffer) | |
| 188 { | |
| 189 AbstractBuffer ab = (AbstractBuffer) b; | |
| 190 if (ab._hash != 0 && _hash != ab._hash) return false; | |
| 191 } | |
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192 |
| 1005 | 193 // Nothing for it but to do the hard grind. |
| 194 int get=getIndex(); | |
| 195 int bi=b.putIndex(); | |
| 196 | |
| 197 byte[] array = array(); | |
| 198 byte[] barray= b.array(); | |
| 199 if (array!=null && barray!=null) | |
| 200 { | |
| 201 for (int i = putIndex(); i-->get;) | |
| 202 { | |
| 203 byte b1 = array[i]; | |
| 204 byte b2 = barray[--bi]; | |
| 205 if (b1 != b2) | |
| 206 { | |
| 207 if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A'); | |
| 208 if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A'); | |
| 209 if (b1 != b2) return false; | |
| 210 } | |
| 211 } | |
| 212 } | |
| 213 else | |
| 214 { | |
| 215 for (int i = putIndex(); i-->get;) | |
| 216 { | |
| 217 byte b1 = peek(i); | |
| 218 byte b2 = b.peek(--bi); | |
| 219 if (b1 != b2) | |
| 220 { | |
| 221 if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A'); | |
| 222 if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A'); | |
| 223 if (b1 != b2) return false; | |
| 224 } | |
| 225 } | |
| 226 } | |
| 227 return true; | |
| 228 } | |
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229 |
| 1005 | 230 public byte get() |
| 231 { | |
| 232 return peek(_get++); | |
| 233 } | |
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234 |
| 1005 | 235 public int get(byte[] b, int offset, int length) |
| 236 { | |
| 237 int gi = getIndex(); | |
| 238 int l=length(); | |
| 239 if (l==0) | |
| 240 return -1; | |
| 241 | |
| 242 if (length>l) | |
| 243 length=l; | |
| 244 | |
| 245 length = peek(gi, b, offset, length); | |
| 246 if (length>0) | |
| 247 setGetIndex(gi + length); | |
| 248 return length; | |
| 249 } | |
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250 |
| 1005 | 251 public Buffer get(int length) |
| 252 { | |
| 253 int gi = getIndex(); | |
| 254 Buffer view = peek(gi, length); | |
| 255 setGetIndex(gi + length); | |
| 256 return view; | |
| 257 } | |
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258 |
| 1005 | 259 public final int getIndex() |
| 260 { | |
| 261 return _get; | |
| 262 } | |
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263 |
| 1005 | 264 public boolean hasContent() |
| 265 { | |
| 266 return _put > _get; | |
| 267 } | |
| 268 | |
| 269 @Override | |
| 270 public int hashCode() | |
| 271 { | |
| 272 if (_hash == 0 || _hashGet!=_get || _hashPut!=_put) | |
| 273 { | |
| 274 int get=getIndex(); | |
| 275 byte[] array = array(); | |
| 276 if (array==null) | |
| 277 { | |
| 278 for (int i = putIndex(); i-- >get;) | |
| 279 { | |
| 280 byte b = peek(i); | |
| 281 if ('a' <= b && b <= 'z') | |
| 282 b = (byte) (b - 'a' + 'A'); | |
| 283 _hash = 31 * _hash + b; | |
| 284 } | |
| 285 } | |
| 286 else | |
| 287 { | |
| 288 for (int i = putIndex(); i-- >get;) | |
| 289 { | |
| 290 byte b = array[i]; | |
| 291 if ('a' <= b && b <= 'z') | |
| 292 b = (byte) (b - 'a' + 'A'); | |
| 293 _hash = 31 * _hash + b; | |
| 294 } | |
| 295 } | |
| 296 if (_hash == 0) | |
| 297 _hash = -1; | |
| 298 _hashGet=_get; | |
| 299 _hashPut=_put; | |
| 300 | |
| 301 } | |
| 302 return _hash; | |
| 303 } | |
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304 |
| 1005 | 305 public boolean isImmutable() |
| 306 { | |
| 307 return _access <= IMMUTABLE; | |
| 308 } | |
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309 |
| 1005 | 310 public boolean isReadOnly() |
| 311 { | |
| 312 return _access <= READONLY; | |
| 313 } | |
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314 |
| 1005 | 315 public boolean isVolatile() |
| 316 { | |
| 317 return _volatile; | |
| 318 } | |
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319 |
| 1005 | 320 public int length() |
| 321 { | |
| 322 return _put - _get; | |
| 323 } | |
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324 |
| 1005 | 325 public void mark() |
| 326 { | |
| 327 setMarkIndex(_get - 1); | |
| 328 } | |
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329 |
| 1005 | 330 public void mark(int offset) |
| 331 { | |
| 332 setMarkIndex(_get + offset); | |
| 333 } | |
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334 |
| 1005 | 335 public int markIndex() |
| 336 { | |
| 337 return _mark; | |
| 338 } | |
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339 |
| 1005 | 340 public byte peek() |
| 341 { | |
| 342 return peek(_get); | |
| 343 } | |
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344 |
| 1005 | 345 public Buffer peek(int index, int length) |
| 346 { | |
| 347 if (_view == null) | |
| 348 { | |
| 349 _view = new View(this, -1, index, index + length, isReadOnly() ? READONLY : READWRITE); | |
| 350 } | |
| 351 else | |
| 352 { | |
| 353 _view.update(this.buffer()); | |
| 354 _view.setMarkIndex(-1); | |
| 355 _view.setGetIndex(0); | |
| 356 _view.setPutIndex(index + length); | |
| 357 _view.setGetIndex(index); | |
| 358 | |
| 359 } | |
| 360 return _view; | |
| 361 } | |
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362 |
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363 @Override |
| 1005 | 364 public int poke(int index, Buffer src) |
| 365 { | |
| 366 _hash=0; | |
| 367 /* | |
| 368 if (isReadOnly()) | |
| 369 throw new IllegalStateException(__READONLY); | |
| 370 if (index < 0) | |
| 371 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 372 */ | |
| 373 | |
| 374 int length=src.length(); | |
| 375 if (index + length > capacity()) | |
| 376 { | |
| 377 length=capacity()-index; | |
| 378 /* | |
| 379 if (length<0) | |
| 380 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 381 */ | |
| 382 } | |
| 383 | |
| 384 byte[] src_array = src.array(); | |
| 385 byte[] dst_array = array(); | |
| 386 if (src_array != null && dst_array != null) | |
| 387 System.arraycopy(src_array, src.getIndex(), dst_array, index, length); | |
| 388 else if (src_array != null) | |
| 389 { | |
| 390 int s=src.getIndex(); | |
| 391 for (int i=0;i<length;i++) | |
| 392 poke(index++,src_array[s++]); | |
| 393 } | |
| 394 else if (dst_array != null) | |
| 395 { | |
| 396 int s=src.getIndex(); | |
| 397 for (int i=0;i<length;i++) | |
| 398 dst_array[index++]=src.peek(s++); | |
| 399 } | |
| 400 else | |
| 401 { | |
| 402 int s=src.getIndex(); | |
| 403 for (int i=0;i<length;i++) | |
| 404 poke(index++,src.peek(s++)); | |
| 405 } | |
| 406 | |
| 407 return length; | |
| 408 } | |
| 409 | |
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410 |
| 1005 | 411 public int poke(int index, byte[] b, int offset, int length) |
| 412 { | |
| 413 _hash=0; | |
| 414 /* | |
| 415 if (isReadOnly()) | |
| 416 throw new IllegalStateException(__READONLY); | |
| 417 if (index < 0) | |
| 418 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 419 */ | |
| 420 if (index + length > capacity()) | |
| 421 { | |
| 422 length=capacity()-index; | |
| 423 /* if (length<0) | |
| 424 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 425 */ | |
| 426 } | |
| 427 | |
| 428 byte[] dst_array = array(); | |
| 429 if (dst_array != null) | |
| 430 System.arraycopy(b, offset, dst_array, index, length); | |
| 431 else | |
| 432 { | |
| 433 int s=offset; | |
| 434 for (int i=0;i<length;i++) | |
| 435 poke(index++,b[s++]); | |
| 436 } | |
| 437 return length; | |
| 438 } | |
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439 |
| 1005 | 440 public int put(Buffer src) |
| 441 { | |
| 442 int pi = putIndex(); | |
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443 int l = poke(pi, src); |
| 1005 | 444 setPutIndex(pi + l); |
| 445 return l; | |
| 446 } | |
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447 |
| 1005 | 448 public void put(byte b) |
| 449 { | |
| 450 int pi = putIndex(); | |
| 451 poke(pi, b); | |
| 452 setPutIndex(pi + 1); | |
| 453 } | |
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454 |
| 1005 | 455 public int put(byte[] b, int offset, int length) |
| 456 { | |
| 457 int pi = putIndex(); | |
| 458 int l = poke(pi, b, offset, length); | |
| 459 setPutIndex(pi + l); | |
| 460 return l; | |
| 461 } | |
| 462 | |
| 463 public int put(byte[] b) | |
| 464 { | |
| 465 int pi = putIndex(); | |
| 466 int l = poke(pi, b, 0, b.length); | |
| 467 setPutIndex(pi + l); | |
| 468 return l; | |
| 469 } | |
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470 |
| 1005 | 471 public final int putIndex() |
| 472 { | |
| 473 return _put; | |
| 474 } | |
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475 |
| 1005 | 476 public void reset() |
| 477 { | |
| 478 if (markIndex() >= 0) setGetIndex(markIndex()); | |
| 479 } | |
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480 |
| 1005 | 481 public void rewind() |
| 482 { | |
| 483 setGetIndex(0); | |
| 484 setMarkIndex(-1); | |
| 485 } | |
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486 |
| 1005 | 487 public void setGetIndex(int getIndex) |
| 488 { | |
| 489 /* bounds checking | |
| 490 if (isImmutable()) | |
| 491 throw new IllegalStateException(__IMMUTABLE); | |
| 492 if (getIndex < 0) | |
| 493 throw new IllegalArgumentException("getIndex<0: " + getIndex + "<0"); | |
| 494 if (getIndex > putIndex()) | |
| 495 throw new IllegalArgumentException("getIndex>putIndex: " + getIndex + ">" + putIndex()); | |
| 496 */ | |
| 497 _get = getIndex; | |
| 498 _hash=0; | |
| 499 } | |
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500 |
| 1005 | 501 public void setMarkIndex(int index) |
| 502 { | |
| 503 /* | |
| 504 if (index>=0 && isImmutable()) | |
| 505 throw new IllegalStateException(__IMMUTABLE); | |
| 506 */ | |
| 507 _mark = index; | |
| 508 } | |
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509 |
| 1005 | 510 public void setPutIndex(int putIndex) |
| 511 { | |
| 512 /* bounds checking | |
| 513 if (isImmutable()) | |
| 514 throw new IllegalStateException(__IMMUTABLE); | |
| 515 if (putIndex > capacity()) | |
| 516 throw new IllegalArgumentException("putIndex>capacity: " + putIndex + ">" + capacity()); | |
| 517 if (getIndex() > putIndex) | |
| 518 throw new IllegalArgumentException("getIndex>putIndex: " + getIndex() + ">" + putIndex); | |
| 519 */ | |
| 520 _put = putIndex; | |
| 521 _hash=0; | |
| 522 } | |
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523 |
| 1005 | 524 public int skip(int n) |
| 525 { | |
| 526 if (length() < n) n = length(); | |
| 527 setGetIndex(getIndex() + n); | |
| 528 return n; | |
| 529 } | |
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530 |
| 1005 | 531 public Buffer slice() |
| 532 { | |
| 533 return peek(getIndex(), length()); | |
| 534 } | |
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535 |
| 1005 | 536 public Buffer sliceFromMark() |
| 537 { | |
| 538 return sliceFromMark(getIndex() - markIndex() - 1); | |
| 539 } | |
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540 |
| 1005 | 541 public Buffer sliceFromMark(int length) |
| 542 { | |
| 543 if (markIndex() < 0) return null; | |
| 544 Buffer view = peek(markIndex(), length); | |
| 545 setMarkIndex(-1); | |
| 546 return view; | |
| 547 } | |
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548 |
| 1005 | 549 public int space() |
| 550 { | |
| 551 return capacity() - _put; | |
| 552 } | |
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553 |
| 1005 | 554 public String toDetailString() |
| 555 { | |
| 556 StringBuilder buf = new StringBuilder(); | |
| 557 buf.append("["); | |
| 558 buf.append(super.hashCode()); | |
| 559 buf.append(","); | |
| 560 buf.append(this.buffer().hashCode()); | |
| 561 buf.append(",m="); | |
| 562 buf.append(markIndex()); | |
| 563 buf.append(",g="); | |
| 564 buf.append(getIndex()); | |
| 565 buf.append(",p="); | |
| 566 buf.append(putIndex()); | |
| 567 buf.append(",c="); | |
| 568 buf.append(capacity()); | |
| 569 buf.append("]={"); | |
| 570 if (markIndex() >= 0) | |
| 571 { | |
| 572 for (int i = markIndex(); i < getIndex(); i++) | |
| 573 { | |
| 574 byte b = peek(i); | |
| 575 TypeUtil.toHex(b,buf); | |
| 576 } | |
| 577 buf.append("}{"); | |
| 578 } | |
| 579 int count = 0; | |
| 580 for (int i = getIndex(); i < putIndex(); i++) | |
| 581 { | |
| 582 byte b = peek(i); | |
| 583 TypeUtil.toHex(b,buf); | |
| 584 if (count++ == 50) | |
| 585 { | |
| 586 if (putIndex() - i > 20) | |
| 587 { | |
| 588 buf.append(" ... "); | |
| 589 i = putIndex() - 20; | |
| 590 } | |
| 591 } | |
| 592 } | |
| 593 buf.append('}'); | |
| 594 return buf.toString(); | |
| 595 } | |
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596 |
| 1005 | 597 @Override |
| 598 public String toString() | |
| 599 { | |
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600 /* |
| 1005 | 601 if (isImmutable()) |
| 602 { | |
| 603 if (_string == null) | |
| 604 _string = new String(asArray(), 0, length()); | |
| 605 return _string; | |
| 606 } | |
| 607 return new String(asArray(), 0, length()); | |
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608 */ |
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609 return toString("ISO-8859-1"); |
| 1005 | 610 } |
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611 |
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612 @Override |
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613 public final String toString(String charset) |
| 1005 | 614 { |
| 615 try | |
| 616 { | |
| 617 byte[] bytes=array(); | |
| 618 if (bytes!=null) | |
| 619 return new String(bytes,getIndex(),length(),charset); | |
| 620 return new String(asArray(), 0, length(),charset); | |
| 621 | |
| 622 } | |
| 623 catch(Exception e) | |
| 624 { | |
| 625 LOG.warn("",e); | |
| 626 return new String(asArray(), 0, length()); | |
| 627 } | |
| 628 } | |
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629 |
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630 @Override |
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631 public final String toString(Charset charset) |
| 1005 | 632 { |
| 633 try | |
| 634 { | |
| 635 byte[] bytes=array(); | |
| 636 if (bytes!=null) | |
| 637 return new String(bytes,getIndex(),length(),charset); | |
| 638 return new String(asArray(), 0, length(),charset); | |
| 639 } | |
| 640 catch(Exception e) | |
| 641 { | |
| 642 LOG.warn("",e); | |
| 643 return new String(asArray(), 0, length()); | |
| 644 } | |
| 645 } | |
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646 |
| 1005 | 647 /* ------------------------------------------------------------ */ |
| 648 public String toDebugString() | |
| 649 { | |
| 650 return getClass()+"@"+super.hashCode(); | |
| 651 } | |
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652 |
| 1005 | 653 /* ------------------------------------------------------------ */ |
| 654 public int readFrom(InputStream in,int max) throws IOException | |
| 655 { | |
| 656 byte[] array = array(); | |
| 657 int s=space(); | |
| 658 if (s>max) | |
| 659 s=max; | |
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660 |
| 1005 | 661 if (array!=null) |
| 662 { | |
| 663 int l=in.read(array,_put,s); | |
| 664 if (l>0) | |
| 665 _put+=l; | |
| 666 return l; | |
| 667 } | |
| 668 else | |
| 669 { | |
| 670 byte[] buf=new byte[s>1024?1024:s]; | |
| 671 int total=0; | |
| 672 while (s>0) | |
| 673 { | |
| 674 int l=in.read(buf,0,buf.length); | |
| 675 if (l<0) | |
| 676 return total>0?total:-1; | |
| 677 int p=put(buf,0,l); | |
| 678 assert l==p; | |
| 679 s-=l; | |
| 680 } | |
| 681 return total; | |
| 682 } | |
| 683 } | |
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684 } |