001/* Generated By:JavaCC: Do not edit this line. SimpleCharStream.java Version 4.0 */ 002/** 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 */ 019 020package org.apache.hadoop.record.compiler.generated; 021 022import org.apache.hadoop.classification.InterfaceAudience; 023import org.apache.hadoop.classification.InterfaceStability; 024 025/** 026 * An implementation of interface CharStream, where the stream is assumed to 027 * contain only ASCII characters (without unicode processing). 028 * 029 * @deprecated Replaced by <a href="https://hadoop.apache.org/avro/">Avro</a>. 030 */ 031@Deprecated 032@InterfaceAudience.Public 033@InterfaceStability.Stable 034public class SimpleCharStream 035{ 036 public static final boolean staticFlag = false; 037 int bufsize; 038 int available; 039 int tokenBegin; 040 public int bufpos = -1; 041 protected int bufline[]; 042 protected int bufcolumn[]; 043 044 protected int column = 0; 045 protected int line = 1; 046 047 protected boolean prevCharIsCR = false; 048 protected boolean prevCharIsLF = false; 049 050 protected java.io.Reader inputStream; 051 052 protected char[] buffer; 053 protected int maxNextCharInd = 0; 054 protected int inBuf = 0; 055 protected int tabSize = 8; 056 057 protected void setTabSize(int i) { tabSize = i; } 058 protected int getTabSize(int i) { return tabSize; } 059 060 061 protected void ExpandBuff(boolean wrapAround) 062 { 063 char[] newbuffer = new char[bufsize + 2048]; 064 int newbufline[] = new int[bufsize + 2048]; 065 int newbufcolumn[] = new int[bufsize + 2048]; 066 067 try 068 { 069 if (wrapAround) 070 { 071 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); 072 System.arraycopy(buffer, 0, newbuffer, 073 bufsize - tokenBegin, bufpos); 074 buffer = newbuffer; 075 076 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); 077 System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos); 078 bufline = newbufline; 079 080 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); 081 System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos); 082 bufcolumn = newbufcolumn; 083 084 maxNextCharInd = (bufpos += (bufsize - tokenBegin)); 085 } 086 else 087 { 088 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); 089 buffer = newbuffer; 090 091 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); 092 bufline = newbufline; 093 094 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); 095 bufcolumn = newbufcolumn; 096 097 maxNextCharInd = (bufpos -= tokenBegin); 098 } 099 } 100 catch (Throwable t) 101 { 102 throw new Error(t.getMessage()); 103 } 104 105 106 bufsize += 2048; 107 available = bufsize; 108 tokenBegin = 0; 109 } 110 111 protected void FillBuff() throws java.io.IOException 112 { 113 if (maxNextCharInd == available) 114 { 115 if (available == bufsize) 116 { 117 if (tokenBegin > 2048) 118 { 119 bufpos = maxNextCharInd = 0; 120 available = tokenBegin; 121 } 122 else if (tokenBegin < 0) 123 bufpos = maxNextCharInd = 0; 124 else 125 ExpandBuff(false); 126 } 127 else if (available > tokenBegin) 128 available = bufsize; 129 else if ((tokenBegin - available) < 2048) 130 ExpandBuff(true); 131 else 132 available = tokenBegin; 133 } 134 135 int i; 136 try { 137 if ((i = inputStream.read(buffer, maxNextCharInd, 138 available - maxNextCharInd)) == -1) 139 { 140 inputStream.close(); 141 throw new java.io.IOException(); 142 } 143 else 144 maxNextCharInd += i; 145 return; 146 } 147 catch(java.io.IOException e) { 148 --bufpos; 149 backup(0); 150 if (tokenBegin == -1) 151 tokenBegin = bufpos; 152 throw e; 153 } 154 } 155 156 public char BeginToken() throws java.io.IOException 157 { 158 tokenBegin = -1; 159 char c = readChar(); 160 tokenBegin = bufpos; 161 162 return c; 163 } 164 165 protected void UpdateLineColumn(char c) 166 { 167 column++; 168 169 if (prevCharIsLF) 170 { 171 prevCharIsLF = false; 172 line += (column = 1); 173 } 174 else if (prevCharIsCR) 175 { 176 prevCharIsCR = false; 177 if (c == '\n') 178 { 179 prevCharIsLF = true; 180 } 181 else 182 line += (column = 1); 183 } 184 185 switch (c) 186 { 187 case '\r' : 188 prevCharIsCR = true; 189 break; 190 case '\n' : 191 prevCharIsLF = true; 192 break; 193 case '\t' : 194 column--; 195 column += (tabSize - (column % tabSize)); 196 break; 197 default : 198 break; 199 } 200 201 bufline[bufpos] = line; 202 bufcolumn[bufpos] = column; 203 } 204 205 public char readChar() throws java.io.IOException 206 { 207 if (inBuf > 0) 208 { 209 --inBuf; 210 211 if (++bufpos == bufsize) 212 bufpos = 0; 213 214 return buffer[bufpos]; 215 } 216 217 if (++bufpos >= maxNextCharInd) 218 FillBuff(); 219 220 char c = buffer[bufpos]; 221 222 UpdateLineColumn(c); 223 return (c); 224 } 225 226 public int getEndColumn() { 227 return bufcolumn[bufpos]; 228 } 229 230 public int getEndLine() { 231 return bufline[bufpos]; 232 } 233 234 public int getBeginColumn() { 235 return bufcolumn[tokenBegin]; 236 } 237 238 public int getBeginLine() { 239 return bufline[tokenBegin]; 240 } 241 242 public void backup(int amount) { 243 244 inBuf += amount; 245 if ((bufpos -= amount) < 0) 246 bufpos += bufsize; 247 } 248 249 public SimpleCharStream(java.io.Reader dstream, int startline, 250 int startcolumn, int buffersize) 251 { 252 inputStream = dstream; 253 line = startline; 254 column = startcolumn - 1; 255 256 available = bufsize = buffersize; 257 buffer = new char[buffersize]; 258 bufline = new int[buffersize]; 259 bufcolumn = new int[buffersize]; 260 } 261 262 public SimpleCharStream(java.io.Reader dstream, int startline, 263 int startcolumn) 264 { 265 this(dstream, startline, startcolumn, 4096); 266 } 267 268 public SimpleCharStream(java.io.Reader dstream) 269 { 270 this(dstream, 1, 1, 4096); 271 } 272 public void ReInit(java.io.Reader dstream, int startline, 273 int startcolumn, int buffersize) 274 { 275 inputStream = dstream; 276 line = startline; 277 column = startcolumn - 1; 278 279 if (buffer == null || buffersize != buffer.length) 280 { 281 available = bufsize = buffersize; 282 buffer = new char[buffersize]; 283 bufline = new int[buffersize]; 284 bufcolumn = new int[buffersize]; 285 } 286 prevCharIsLF = prevCharIsCR = false; 287 tokenBegin = inBuf = maxNextCharInd = 0; 288 bufpos = -1; 289 } 290 291 public void ReInit(java.io.Reader dstream, int startline, 292 int startcolumn) 293 { 294 ReInit(dstream, startline, startcolumn, 4096); 295 } 296 297 public void ReInit(java.io.Reader dstream) 298 { 299 ReInit(dstream, 1, 1, 4096); 300 } 301 public SimpleCharStream(java.io.InputStream dstream, String encoding, int startline, 302 int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException 303 { 304 this(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize); 305 } 306 307 public SimpleCharStream(java.io.InputStream dstream, int startline, 308 int startcolumn, int buffersize) 309 { 310 this(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize); 311 } 312 313 public SimpleCharStream(java.io.InputStream dstream, String encoding, int startline, 314 int startcolumn) throws java.io.UnsupportedEncodingException 315 { 316 this(dstream, encoding, startline, startcolumn, 4096); 317 } 318 319 public SimpleCharStream(java.io.InputStream dstream, int startline, 320 int startcolumn) 321 { 322 this(dstream, startline, startcolumn, 4096); 323 } 324 325 public SimpleCharStream(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException 326 { 327 this(dstream, encoding, 1, 1, 4096); 328 } 329 330 public SimpleCharStream(java.io.InputStream dstream) 331 { 332 this(dstream, 1, 1, 4096); 333 } 334 335 public void ReInit(java.io.InputStream dstream, String encoding, int startline, 336 int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException 337 { 338 ReInit(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize); 339 } 340 341 public void ReInit(java.io.InputStream dstream, int startline, 342 int startcolumn, int buffersize) 343 { 344 ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize); 345 } 346 347 public void ReInit(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException 348 { 349 ReInit(dstream, encoding, 1, 1, 4096); 350 } 351 352 public void ReInit(java.io.InputStream dstream) 353 { 354 ReInit(dstream, 1, 1, 4096); 355 } 356 public void ReInit(java.io.InputStream dstream, String encoding, int startline, 357 int startcolumn) throws java.io.UnsupportedEncodingException 358 { 359 ReInit(dstream, encoding, startline, startcolumn, 4096); 360 } 361 public void ReInit(java.io.InputStream dstream, int startline, 362 int startcolumn) 363 { 364 ReInit(dstream, startline, startcolumn, 4096); 365 } 366 public String GetImage() 367 { 368 if (bufpos >= tokenBegin) 369 return new String(buffer, tokenBegin, bufpos - tokenBegin + 1); 370 else 371 return new String(buffer, tokenBegin, bufsize - tokenBegin) + 372 new String(buffer, 0, bufpos + 1); 373 } 374 375 public char[] GetSuffix(int len) 376 { 377 char[] ret = new char[len]; 378 379 if ((bufpos + 1) >= len) 380 System.arraycopy(buffer, bufpos - len + 1, ret, 0, len); 381 else 382 { 383 System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0, 384 len - bufpos - 1); 385 System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1); 386 } 387 388 return ret; 389 } 390 391 public void Done() 392 { 393 buffer = null; 394 bufline = null; 395 bufcolumn = null; 396 } 397 398 /** 399 * Method to adjust line and column numbers for the start of a token. 400 */ 401 public void adjustBeginLineColumn(int newLine, int newCol) 402 { 403 int start = tokenBegin; 404 int len; 405 406 if (bufpos >= tokenBegin) 407 { 408 len = bufpos - tokenBegin + inBuf + 1; 409 } 410 else 411 { 412 len = bufsize - tokenBegin + bufpos + 1 + inBuf; 413 } 414 415 int i = 0, j = 0, k = 0; 416 int nextColDiff = 0, columnDiff = 0; 417 418 while (i < len && 419 bufline[j = start % bufsize] == bufline[k = ++start % bufsize]) 420 { 421 bufline[j] = newLine; 422 nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j]; 423 bufcolumn[j] = newCol + columnDiff; 424 columnDiff = nextColDiff; 425 i++; 426 } 427 428 if (i < len) 429 { 430 bufline[j] = newLine++; 431 bufcolumn[j] = newCol + columnDiff; 432 433 while (i++ < len) 434 { 435 if (bufline[j = start % bufsize] != bufline[++start % bufsize]) 436 bufline[j] = newLine++; 437 else 438 bufline[j] = newLine; 439 } 440 } 441 442 line = bufline[j]; 443 column = bufcolumn[j]; 444 } 445 446}