| 1 | /* |
| 2 | Copyright (C) 2002-2005 MySQL AB |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of version 2 of the GNU General Public License as |
| 6 | published by the Free Software Foundation. |
| 7 | |
| 8 | There are special exceptions to the terms and conditions of the GPL |
| 9 | as it is applied to this software. View the full text of the |
| 10 | exception in file EXCEPTIONS-CONNECTOR-J in the directory of this |
| 11 | software distribution. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | |
| 22 | |
| 23 | |
| 24 | */ |
| 25 | package com.mysql.jdbc; |
| 26 | |
| 27 | import java.io.UnsupportedEncodingException; |
| 28 | |
| 29 | import java.nio.ByteBuffer; |
| 30 | |
| 31 | import java.sql.SQLException; |
| 32 | |
| 33 | /** |
| 34 | * Buffer contains code to read and write packets from/to the MySQL server. |
| 35 | * |
| 36 | * @version $Id: Buffer.java 5417 2006-06-20 21:33:56 +0000 (Tue, 20 Jun 2006) mmatthews $ |
| 37 | * @author Mark Matthews |
| 38 | */ |
| 39 | class Buffer { |
| 40 | static final int MAX_BYTES_TO_DUMP = 512; |
| 41 | |
| 42 | static final int NO_LENGTH_LIMIT = -1; |
| 43 | |
| 44 | static final long NULL_LENGTH = -1; |
| 45 | |
| 46 | private int bufLength = 0; |
| 47 | |
| 48 | private byte[] byteBuffer; |
| 49 | |
| 50 | private int position = 0; |
| 51 | |
| 52 | protected boolean wasMultiPacket = false; |
| 53 | |
| 54 | Buffer(byte[] buf) { |
| 55 | this.byteBuffer = buf; |
| 56 | setBufLength(buf.length); |
| 57 | } |
| 58 | |
| 59 | Buffer(int size) { |
| 60 | this.byteBuffer = new byte[size]; |
| 61 | setBufLength(this.byteBuffer.length); |
| 62 | this.position = MysqlIO.HEADER_LENGTH; |
| 63 | } |
| 64 | |
| 65 | final void clear() { |
| 66 | this.position = MysqlIO.HEADER_LENGTH; |
| 67 | } |
| 68 | |
| 69 | final void dump() { |
| 70 | dump(getBufLength()); |
| 71 | } |
| 72 | |
| 73 | final String dump(int numBytes) { |
| 74 | return StringUtils.dumpAsHex(getBytes(0, |
| 75 | numBytes > getBufLength() ? getBufLength() : numBytes), |
| 76 | numBytes > getBufLength() ? getBufLength() : numBytes); |
| 77 | } |
| 78 | |
| 79 | final String dumpClampedBytes(int numBytes) { |
| 80 | int numBytesToDump = numBytes < MAX_BYTES_TO_DUMP ? numBytes |
| 81 | : MAX_BYTES_TO_DUMP; |
| 82 | |
| 83 | String dumped = StringUtils.dumpAsHex(getBytes(0, |
| 84 | numBytesToDump > getBufLength() ? getBufLength() |
| 85 | : numBytesToDump), |
| 86 | numBytesToDump > getBufLength() ? getBufLength() |
| 87 | : numBytesToDump); |
| 88 | |
| 89 | if (numBytesToDump < numBytes) { |
| 90 | return dumped + " ....(packet exceeds max. dump length)"; |
| 91 | } |
| 92 | |
| 93 | return dumped; |
| 94 | } |
| 95 | |
| 96 | final void dumpHeader() { |
| 97 | for (int i = 0; i < MysqlIO.HEADER_LENGTH; i++) { |
| 98 | String hexVal = Integer.toHexString(readByte(i) & 0xff); |
| 99 | |
| 100 | if (hexVal.length() == 1) { |
| 101 | hexVal = "0" + hexVal; //$NON-NLS-1$ |
| 102 | } |
| 103 | |
| 104 | System.out.print(hexVal + " "); //$NON-NLS-1$ |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | final void dumpNBytes(int start, int nBytes) { |
| 109 | StringBuffer asciiBuf = new StringBuffer(); |
| 110 | |
| 111 | for (int i = start; (i < (start + nBytes)) && (i < getBufLength()); i++) { |
| 112 | String hexVal = Integer.toHexString(readByte(i) & 0xff); |
| 113 | |
| 114 | if (hexVal.length() == 1) { |
| 115 | hexVal = "0" + hexVal; //$NON-NLS-1$ |
| 116 | } |
| 117 | |
| 118 | System.out.print(hexVal + " "); //$NON-NLS-1$ |
| 119 | |
| 120 | if ((readByte(i) > 32) && (readByte(i) < 127)) { |
| 121 | asciiBuf.append((char) readByte(i)); |
| 122 | } else { |
| 123 | asciiBuf.append("."); //$NON-NLS-1$ |
| 124 | } |
| 125 | |
| 126 | asciiBuf.append(" "); //$NON-NLS-1$ |
| 127 | } |
| 128 | |
| 129 | System.out.println(" " + asciiBuf.toString()); //$NON-NLS-1$ |
| 130 | } |
| 131 | |
| 132 | final void ensureCapacity(int additionalData) throws SQLException { |
| 133 | if ((this.position + additionalData) > getBufLength()) { |
| 134 | if ((this.position + additionalData) < this.byteBuffer.length) { |
| 135 | // byteBuffer.length is != getBufLength() all of the time |
| 136 | // due to re-using of packets (we don't shrink them) |
| 137 | // |
| 138 | // If we can, don't re-alloc, just set buffer length |
| 139 | // to size of current buffer |
| 140 | setBufLength(this.byteBuffer.length); |
| 141 | } else { |
| 142 | // |
| 143 | // Otherwise, re-size, and pad so we can avoid |
| 144 | // allocing again in the near future |
| 145 | // |
| 146 | int newLength = (int) (this.byteBuffer.length * 1.25); |
| 147 | |
| 148 | if (newLength < (this.byteBuffer.length + additionalData)) { |
| 149 | newLength = this.byteBuffer.length |
| 150 | + (int) (additionalData * 1.25); |
| 151 | } |
| 152 | |
| 153 | if (newLength < this.byteBuffer.length) { |
| 154 | newLength = this.byteBuffer.length + additionalData; |
| 155 | } |
| 156 | |
| 157 | byte[] newBytes = new byte[newLength]; |
| 158 | |
| 159 | System.arraycopy(this.byteBuffer, 0, newBytes, 0, |
| 160 | this.byteBuffer.length); |
| 161 | this.byteBuffer = newBytes; |
| 162 | setBufLength(this.byteBuffer.length); |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Skip over a length-encoded string |
| 169 | * |
| 170 | * @return The position past the end of the string |
| 171 | */ |
| 172 | public int fastSkipLenString() { |
| 173 | long len = this.readFieldLength(); |
| 174 | |
| 175 | this.position += len; |
| 176 | |
| 177 | return (int) len; // this is safe, as this is only |
| 178 | } |
| 179 | |
| 180 | protected final byte[] getBufferSource() { |
| 181 | return this.byteBuffer; |
| 182 | } |
| 183 | |
| 184 | int getBufLength() { |
| 185 | return this.bufLength; |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * Returns the array of bytes this Buffer is using to read from. |
| 190 | * |
| 191 | * @return byte array being read from |
| 192 | */ |
| 193 | public byte[] getByteBuffer() { |
| 194 | return this.byteBuffer; |
| 195 | } |
| 196 | |
| 197 | final byte[] getBytes(int len) { |
| 198 | byte[] b = new byte[len]; |
| 199 | System.arraycopy(this.byteBuffer, this.position, b, 0, len); |
| 200 | this.position += len; // update cursor |
| 201 | |
| 202 | return b; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * (non-Javadoc) |
| 207 | * |
| 208 | * @see com.mysql.jdbc.Buffer#getBytes(int, int) |
| 209 | */ |
| 210 | byte[] getBytes(int offset, int len) { |
| 211 | byte[] dest = new byte[len]; |
| 212 | System.arraycopy(this.byteBuffer, offset, dest, 0, len); |
| 213 | |
| 214 | return dest; |
| 215 | } |
| 216 | |
| 217 | int getCapacity() { |
| 218 | return this.byteBuffer.length; |
| 219 | } |
| 220 | |
| 221 | public ByteBuffer getNioBuffer() { |
| 222 | throw new IllegalArgumentException(Messages |
| 223 | .getString("ByteArrayBuffer.0")); //$NON-NLS-1$ |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * Returns the current position to write to/ read from |
| 228 | * |
| 229 | * @return the current position to write to/ read from |
| 230 | */ |
| 231 | public int getPosition() { |
| 232 | return this.position; |
| 233 | } |
| 234 | |
| 235 | // 2000-06-05 Changed |
| 236 | final boolean isLastDataPacket() { |
| 237 | return ((getBufLength() < 9) && ((this.byteBuffer[0] & 0xff) == 254)); |
| 238 | } |
| 239 | |
| 240 | final long newReadLength() { |
| 241 | int sw = this.byteBuffer[this.position++] & 0xff; |
| 242 | |
| 243 | switch (sw) { |
| 244 | case 251: |
| 245 | return 0; |
| 246 | |
| 247 | case 252: |
| 248 | return readInt(); |
| 249 | |
| 250 | case 253: |
| 251 | return readLongInt(); |
| 252 | |
| 253 | case 254: // changed for 64 bit lengths |
| 254 | return readLongLong(); |
| 255 | |
| 256 | default: |
| 257 | return sw; |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | final byte readByte() { |
| 262 | return this.byteBuffer[this.position++]; |
| 263 | } |
| 264 | |
| 265 | final byte readByte(int readAt) { |
| 266 | return this.byteBuffer[readAt]; |
| 267 | } |
| 268 | |
| 269 | final long readFieldLength() { |
| 270 | int sw = this.byteBuffer[this.position++] & 0xff; |
| 271 | |
| 272 | switch (sw) { |
| 273 | case 251: |
| 274 | return NULL_LENGTH; |
| 275 | |
| 276 | case 252: |
| 277 | return readInt(); |
| 278 | |
| 279 | case 253: |
| 280 | return readLongInt(); |
| 281 | |
| 282 | case 254: |
| 283 | return readLongLong(); |
| 284 | |
| 285 | default: |
| 286 | return sw; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | // 2000-06-05 Changed |
| 291 | final int readInt() { |
| 292 | byte[] b = this.byteBuffer; // a little bit optimization |
| 293 | |
| 294 | return (b[this.position++] & 0xff) | ((b[this.position++] & 0xff) << 8); |
| 295 | } |
| 296 | |
| 297 | final int readIntAsLong() { |
| 298 | byte[] b = this.byteBuffer; |
| 299 | |
| 300 | return (b[this.position++] & 0xff) | ((b[this.position++] & 0xff) << 8) |
| 301 | | ((b[this.position++] & 0xff) << 16) |
| 302 | | ((b[this.position++] & 0xff) << 24); |
| 303 | } |
| 304 | |
| 305 | final byte[] readLenByteArray(int offset) { |
| 306 | long len = this.readFieldLength(); |
| 307 | |
| 308 | if (len == NULL_LENGTH) { |
| 309 | return null; |
| 310 | } |
| 311 | |
| 312 | if (len == 0) { |
| 313 | return Constants.EMPTY_BYTE_ARRAY; |
| 314 | } |
| 315 | |
| 316 | this.position += offset; |
| 317 | |
| 318 | return getBytes((int) len); |
| 319 | } |
| 320 | |
| 321 | final long readLength() { |
| 322 | int sw = this.byteBuffer[this.position++] & 0xff; |
| 323 | |
| 324 | switch (sw) { |
| 325 | case 251: |
| 326 | return 0; |
| 327 | |
| 328 | case 252: |
| 329 | return readInt(); |
| 330 | |
| 331 | case 253: |
| 332 | return readLongInt(); |
| 333 | |
| 334 | case 254: |
| 335 | return readLong(); |
| 336 | |
| 337 | default: |
| 338 | return sw; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | // 2000-06-05 Fixed |
| 343 | final long readLong() { |
| 344 | byte[] b = this.byteBuffer; |
| 345 | |
| 346 | return ((long) b[this.position++] & 0xff) |
| 347 | | (((long) b[this.position++] & 0xff) << 8) |
| 348 | | ((long) (b[this.position++] & 0xff) << 16) |
| 349 | | ((long) (b[this.position++] & 0xff) << 24); |
| 350 | } |
| 351 | |
| 352 | // 2000-06-05 Changed |
| 353 | final int readLongInt() { |
| 354 | byte[] b = this.byteBuffer; |
| 355 | |
| 356 | return (b[this.position++] & 0xff) | ((b[this.position++] & 0xff) << 8) |
| 357 | | ((b[this.position++] & 0xff) << 16); |
| 358 | } |
| 359 | |
| 360 | // 2000-06-05 Fixed |
| 361 | final long readLongLong() { |
| 362 | byte[] b = this.byteBuffer; |
| 363 | |
| 364 | return (b[this.position++] & 0xff) |
| 365 | | ((long) (b[this.position++] & 0xff) << 8) |
| 366 | | ((long) (b[this.position++] & 0xff) << 16) |
| 367 | | ((long) (b[this.position++] & 0xff) << 24) |
| 368 | | ((long) (b[this.position++] & 0xff) << 32) |
| 369 | | ((long) (b[this.position++] & 0xff) << 40) |
| 370 | | ((long) (b[this.position++] & 0xff) << 48) |
| 371 | | ((long) (b[this.position++] & 0xff) << 56); |
| 372 | } |
| 373 | |
| 374 | final int readnBytes() { |
| 375 | int sw = this.byteBuffer[this.position++] & 0xff; |
| 376 | |
| 377 | switch (sw) { |
| 378 | case 1: |
| 379 | return this.byteBuffer[this.position++] & 0xff; |
| 380 | |
| 381 | case 2: |
| 382 | return this.readInt(); |
| 383 | |
| 384 | case 3: |
| 385 | return this.readLongInt(); |
| 386 | |
| 387 | case 4: |
| 388 | return (int) this.readLong(); |
| 389 | |
| 390 | default: |
| 391 | return 255; |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | // |
| 396 | // Read a null-terminated string |
| 397 | // |
| 398 | // To avoid alloc'ing a new byte array, we |
| 399 | // do this by hand, rather than calling getNullTerminatedBytes() |
| 400 | // |
| 401 | final String readString() { |
| 402 | int i = this.position; |
| 403 | int len = 0; |
| 404 | int maxLen = getBufLength(); |
| 405 | |
| 406 | while ((i < maxLen) && (this.byteBuffer[i] != 0)) { |
| 407 | len++; |
| 408 | i++; |
| 409 | } |
| 410 | |
| 411 | String s = new String(this.byteBuffer, this.position, len); |
| 412 | this.position += (len + 1); // update cursor |
| 413 | |
| 414 | return s; |
| 415 | } |
| 416 | |
| 417 | final String readString(String encoding) throws SQLException { |
| 418 | int i = this.position; |
| 419 | int len = 0; |
| 420 | int maxLen = getBufLength(); |
| 421 | |
| 422 | while ((i < maxLen) && (this.byteBuffer[i] != 0)) { |
| 423 | len++; |
| 424 | i++; |
| 425 | } |
| 426 | |
| 427 | try { |
| 428 | return new String(this.byteBuffer, this.position, len, encoding); |
| 429 | } catch (UnsupportedEncodingException uEE) { |
| 430 | throw SQLError.createSQLException(Messages.getString("ByteArrayBuffer.1") //$NON-NLS-1$ |
| 431 | + encoding + "'", SQLError.SQL_STATE_ILLEGAL_ARGUMENT); //$NON-NLS-1$ |
| 432 | } finally { |
| 433 | this.position += (len + 1); // update cursor |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | void setBufLength(int bufLengthToSet) { |
| 438 | this.bufLength = bufLengthToSet; |
| 439 | } |
| 440 | |
| 441 | /** |
| 442 | * Sets the array of bytes to use as a buffer to read from. |
| 443 | * |
| 444 | * @param byteBuffer |
| 445 | * the array of bytes to use as a buffer |
| 446 | */ |
| 447 | public void setByteBuffer(byte[] byteBufferToSet) { |
| 448 | this.byteBuffer = byteBufferToSet; |
| 449 | } |
| 450 | |
| 451 | /** |
| 452 | * Set the current position to write to/ read from |
| 453 | * |
| 454 | * @param position |
| 455 | * the position (0-based index) |
| 456 | */ |
| 457 | public void setPosition(int positionToSet) { |
| 458 | this.position = positionToSet; |
| 459 | } |
| 460 | |
| 461 | /** |
| 462 | * Sets whether this packet was part of a multipacket |
| 463 | * |
| 464 | * @param flag |
| 465 | * was this packet part of a multipacket? |
| 466 | */ |
| 467 | public void setWasMultiPacket(boolean flag) { |
| 468 | this.wasMultiPacket = flag; |
| 469 | } |
| 470 | |
| 471 | public String toString() { |
| 472 | return dumpClampedBytes(getPosition()); |
| 473 | } |
| 474 | |
| 475 | public String toSuperString() { |
| 476 | return super.toString(); |
| 477 | } |
| 478 | |
| 479 | /** |
| 480 | * Was this packet part of a multipacket? |
| 481 | * |
| 482 | * @return was this packet part of a multipacket? |
| 483 | */ |
| 484 | public boolean wasMultiPacket() { |
| 485 | return this.wasMultiPacket; |
| 486 | } |
| 487 | |
| 488 | final void writeByte(byte b) throws SQLException { |
| 489 | ensureCapacity(1); |
| 490 | |
| 491 | this.byteBuffer[this.position++] = b; |
| 492 | } |
| 493 | |
| 494 | // Write a byte array |
| 495 | final void writeBytesNoNull(byte[] bytes) throws SQLException { |
| 496 | int len = bytes.length; |
| 497 | ensureCapacity(len); |
| 498 | System.arraycopy(bytes, 0, this.byteBuffer, this.position, len); |
| 499 | this.position += len; |
| 500 | } |
| 501 | |
| 502 | // Write a byte array with the given offset and length |
| 503 | final void writeBytesNoNull(byte[] bytes, int offset, int length) |
| 504 | throws SQLException { |
| 505 | ensureCapacity(length); |
| 506 | System.arraycopy(bytes, offset, this.byteBuffer, this.position, length); |
| 507 | this.position += length; |
| 508 | } |
| 509 | |
| 510 | final void writeDouble(double d) throws SQLException { |
| 511 | long l = Double.doubleToLongBits(d); |
| 512 | writeLongLong(l); |
| 513 | } |
| 514 | |
| 515 | final void writeFieldLength(long length) throws SQLException { |
| 516 | if (length < 251) { |
| 517 | writeByte((byte) length); |
| 518 | } else if (length < 65536L) { |
| 519 | ensureCapacity(3); |
| 520 | writeByte((byte) 252); |
| 521 | writeInt((int) length); |
| 522 | } else if (length < 16777216L) { |
| 523 | ensureCapacity(4); |
| 524 | writeByte((byte) 253); |
| 525 | writeLongInt((int) length); |
| 526 | } else { |
| 527 | ensureCapacity(9); |
| 528 | writeByte((byte) 254); |
| 529 | writeLongLong(length); |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | final void writeFloat(float f) throws SQLException { |
| 534 | ensureCapacity(4); |
| 535 | |
| 536 | int i = Float.floatToIntBits(f); |
| 537 | byte[] b = this.byteBuffer; |
| 538 | b[this.position++] = (byte) (i & 0xff); |
| 539 | b[this.position++] = (byte) (i >>> 8); |
| 540 | b[this.position++] = (byte) (i >>> 16); |
| 541 | b[this.position++] = (byte) (i >>> 24); |
| 542 | } |
| 543 | |
| 544 | // 2000-06-05 Changed |
| 545 | final void writeInt(int i) throws SQLException { |
| 546 | ensureCapacity(2); |
| 547 | |
| 548 | byte[] b = this.byteBuffer; |
| 549 | b[this.position++] = (byte) (i & 0xff); |
| 550 | b[this.position++] = (byte) (i >>> 8); |
| 551 | } |
| 552 | |
| 553 | // Write a String using the specified character |
| 554 | // encoding |
| 555 | final void writeLenBytes(byte[] b) throws SQLException { |
| 556 | int len = b.length; |
| 557 | ensureCapacity(len + 9); |
| 558 | writeFieldLength(len); |
| 559 | System.arraycopy(b, 0, this.byteBuffer, this.position, len); |
| 560 | this.position += len; |
| 561 | } |
| 562 | |
| 563 | // Write a String using the specified character |
| 564 | // encoding |
| 565 | final void writeLenString(String s, String encoding, String serverEncoding, |
| 566 | SingleByteCharsetConverter converter, boolean parserKnowsUnicode, |
| 567 | Connection conn) |
| 568 | throws UnsupportedEncodingException, SQLException { |
| 569 | byte[] b = null; |
| 570 | |
| 571 | if (converter != null) { |
| 572 | b = converter.toBytes(s); |
| 573 | } else { |
| 574 | b = StringUtils.getBytes(s, encoding, serverEncoding, |
| 575 | parserKnowsUnicode, conn); |
| 576 | } |
| 577 | |
| 578 | int len = b.length; |
| 579 | ensureCapacity(len + 9); |
| 580 | writeFieldLength(len); |
| 581 | System.arraycopy(b, 0, this.byteBuffer, this.position, len); |
| 582 | this.position += len; |
| 583 | } |
| 584 | |
| 585 | // 2000-06-05 Changed |
| 586 | final void writeLong(long i) throws SQLException { |
| 587 | ensureCapacity(4); |
| 588 | |
| 589 | byte[] b = this.byteBuffer; |
| 590 | b[this.position++] = (byte) (i & 0xff); |
| 591 | b[this.position++] = (byte) (i >>> 8); |
| 592 | b[this.position++] = (byte) (i >>> 16); |
| 593 | b[this.position++] = (byte) (i >>> 24); |
| 594 | } |
| 595 | |
| 596 | // 2000-06-05 Changed |
| 597 | final void writeLongInt(int i) throws SQLException { |
| 598 | ensureCapacity(3); |
| 599 | byte[] b = this.byteBuffer; |
| 600 | b[this.position++] = (byte) (i & 0xff); |
| 601 | b[this.position++] = (byte) (i >>> 8); |
| 602 | b[this.position++] = (byte) (i >>> 16); |
| 603 | } |
| 604 | |
| 605 | final void writeLongLong(long i) throws SQLException { |
| 606 | ensureCapacity(8); |
| 607 | byte[] b = this.byteBuffer; |
| 608 | b[this.position++] = (byte) (i & 0xff); |
| 609 | b[this.position++] = (byte) (i >>> 8); |
| 610 | b[this.position++] = (byte) (i >>> 16); |
| 611 | b[this.position++] = (byte) (i >>> 24); |
| 612 | b[this.position++] = (byte) (i >>> 32); |
| 613 | b[this.position++] = (byte) (i >>> 40); |
| 614 | b[this.position++] = (byte) (i >>> 48); |
| 615 | b[this.position++] = (byte) (i >>> 56); |
| 616 | } |
| 617 | |
| 618 | // Write null-terminated string |
| 619 | final void writeString(String s) throws SQLException { |
| 620 | ensureCapacity((s.length() * 2) + 1); |
| 621 | writeStringNoNull(s); |
| 622 | this.byteBuffer[this.position++] = 0; |
| 623 | } |
| 624 | |
| 625 | // Write null-terminated string in the given encoding |
| 626 | final void writeString(String s, String encoding, Connection conn) throws SQLException { |
| 627 | ensureCapacity((s.length() * 2) + 1); |
| 628 | try { |
| 629 | writeStringNoNull(s, encoding, encoding, false, conn); |
| 630 | } catch (UnsupportedEncodingException ue) { |
| 631 | throw new SQLException(ue.toString(), SQLError.SQL_STATE_GENERAL_ERROR); |
| 632 | } |
| 633 | |
| 634 | this.byteBuffer[this.position++] = 0; |
| 635 | } |
| 636 | |
| 637 | // Write string, with no termination |
| 638 | final void writeStringNoNull(String s) throws SQLException { |
| 639 | int len = s.length(); |
| 640 | ensureCapacity(len * 2); |
| 641 | System.arraycopy(s.getBytes(), 0, this.byteBuffer, this.position, len); |
| 642 | this.position += len; |
| 643 | |
| 644 | // for (int i = 0; i < len; i++) |
| 645 | // { |
| 646 | // this.byteBuffer[this.position++] = (byte)s.charAt(i); |
| 647 | // } |
| 648 | } |
| 649 | |
| 650 | // Write a String using the specified character |
| 651 | // encoding |
| 652 | final void writeStringNoNull(String s, String encoding, |
| 653 | String serverEncoding, boolean parserKnowsUnicode, Connection conn) |
| 654 | throws UnsupportedEncodingException, SQLException { |
| 655 | byte[] b = StringUtils.getBytes(s, encoding, serverEncoding, |
| 656 | parserKnowsUnicode, conn); |
| 657 | |
| 658 | int len = b.length; |
| 659 | ensureCapacity(len); |
| 660 | System.arraycopy(b, 0, this.byteBuffer, this.position, len); |
| 661 | this.position += len; |
| 662 | } |
| 663 | } |