Source Code Cross Referenced for SimpleCharStream.java in  » Aspect-oriented » aspectwerkz-2.0 » org » codehaus » aspectwerkz » annotation » expression » ast » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Aspect oriented » aspectwerkz 2.0 » org.codehaus.aspectwerkz.annotation.expression.ast 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* Generated By:JavaCC: Do not edit this line. SimpleCharStream.java Version 3.0 */
002:
003:        /**************************************************************************************
004:         * Copyright (c) Jonas BonŽr, Alexandre Vasseur. All rights reserved.                 *
005:         * http://aspectwerkz.codehaus.org                                                    *
006:         * ---------------------------------------------------------------------------------- *
007:         * The software in this package is published under the terms of the LGPL license      *
008:         * a copy of which has been included with this distribution in the license.txt file.  *
009:         **************************************************************************************/package org.codehaus.aspectwerkz.annotation.expression.ast;
010:
011:        /**
012:         * An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (without
013:         * unicode processing).
014:         */
015:        public class SimpleCharStream {
016:            public static final boolean staticFlag = true;
017:
018:            static int bufsize;
019:
020:            static int available;
021:
022:            static int tokenBegin;
023:
024:            static public int bufpos = -1;
025:
026:            static protected int[] bufline;
027:
028:            static protected int[] bufcolumn;
029:
030:            static protected int column = 0;
031:
032:            static protected int line = 1;
033:
034:            static protected boolean prevCharIsCR = false;
035:
036:            static protected boolean prevCharIsLF = false;
037:
038:            static protected java.io.Reader inputStream;
039:
040:            static protected char[] buffer;
041:
042:            static protected int maxNextCharInd = 0;
043:
044:            static protected int inBuf = 0;
045:
046:            public SimpleCharStream(java.io.Reader dstream, int startline,
047:                    int startcolumn, int buffersize) {
048:                if (inputStream != null) {
049:                    throw new Error(
050:                            "\n   ERROR: Second call to the constructor of a static SimpleCharStream.  You must\n"
051:                                    + "       either use ReInit() or set the JavaCC option STATIC to false\n"
052:                                    + "       during the generation of this class.");
053:                }
054:                inputStream = dstream;
055:                line = startline;
056:                column = startcolumn - 1;
057:                available = bufsize = buffersize;
058:                buffer = new char[buffersize];
059:                bufline = new int[buffersize];
060:                bufcolumn = new int[buffersize];
061:            }
062:
063:            public SimpleCharStream(java.io.Reader dstream, int startline,
064:                    int startcolumn) {
065:                this (dstream, startline, startcolumn, 4096);
066:            }
067:
068:            public SimpleCharStream(java.io.Reader dstream) {
069:                this (dstream, 1, 1, 4096);
070:            }
071:
072:            public SimpleCharStream(java.io.InputStream dstream, int startline,
073:                    int startcolumn, int buffersize) {
074:                this (new java.io.InputStreamReader(dstream), startline,
075:                        startcolumn, 4096);
076:            }
077:
078:            public SimpleCharStream(java.io.InputStream dstream, int startline,
079:                    int startcolumn) {
080:                this (dstream, startline, startcolumn, 4096);
081:            }
082:
083:            public SimpleCharStream(java.io.InputStream dstream) {
084:                this (dstream, 1, 1, 4096);
085:            }
086:
087:            static protected void ExpandBuff(boolean wrapAround) {
088:                char[] newbuffer = new char[bufsize + 2048];
089:                int[] newbufline = new int[bufsize + 2048];
090:                int[] newbufcolumn = new int[bufsize + 2048];
091:                try {
092:                    if (wrapAround) {
093:                        System.arraycopy(buffer, tokenBegin, newbuffer, 0,
094:                                bufsize - tokenBegin);
095:                        System.arraycopy(buffer, 0, newbuffer, bufsize
096:                                - tokenBegin, bufpos);
097:                        buffer = newbuffer;
098:                        System.arraycopy(bufline, tokenBegin, newbufline, 0,
099:                                bufsize - tokenBegin);
100:                        System.arraycopy(bufline, 0, newbufline, bufsize
101:                                - tokenBegin, bufpos);
102:                        bufline = newbufline;
103:                        System.arraycopy(bufcolumn, tokenBegin, newbufcolumn,
104:                                0, bufsize - tokenBegin);
105:                        System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize
106:                                - tokenBegin, bufpos);
107:                        bufcolumn = newbufcolumn;
108:                        maxNextCharInd = (bufpos += (bufsize - tokenBegin));
109:                    } else {
110:                        System.arraycopy(buffer, tokenBegin, newbuffer, 0,
111:                                bufsize - tokenBegin);
112:                        buffer = newbuffer;
113:                        System.arraycopy(bufline, tokenBegin, newbufline, 0,
114:                                bufsize - tokenBegin);
115:                        bufline = newbufline;
116:                        System.arraycopy(bufcolumn, tokenBegin, newbufcolumn,
117:                                0, bufsize - tokenBegin);
118:                        bufcolumn = newbufcolumn;
119:                        maxNextCharInd = (bufpos -= tokenBegin);
120:                    }
121:                } catch (Throwable t) {
122:                    throw new Error(t.getMessage());
123:                }
124:                bufsize += 2048;
125:                available = bufsize;
126:                tokenBegin = 0;
127:            }
128:
129:            static protected void FillBuff() throws java.io.IOException {
130:                if (maxNextCharInd == available) {
131:                    if (available == bufsize) {
132:                        if (tokenBegin > 2048) {
133:                            bufpos = maxNextCharInd = 0;
134:                            available = tokenBegin;
135:                        } else if (tokenBegin < 0) {
136:                            bufpos = maxNextCharInd = 0;
137:                        } else {
138:                            ExpandBuff(false);
139:                        }
140:                    } else if (available > tokenBegin) {
141:                        available = bufsize;
142:                    } else if ((tokenBegin - available) < 2048) {
143:                        ExpandBuff(true);
144:                    } else {
145:                        available = tokenBegin;
146:                    }
147:                }
148:                int i;
149:                try {
150:                    if ((i = inputStream.read(buffer, maxNextCharInd, available
151:                            - maxNextCharInd)) == -1) {
152:                        inputStream.close();
153:                        throw new java.io.IOException();
154:                    } else {
155:                        maxNextCharInd += i;
156:                    }
157:                    return;
158:                } catch (java.io.IOException e) {
159:                    --bufpos;
160:                    backup(0);
161:                    if (tokenBegin == -1) {
162:                        tokenBegin = bufpos;
163:                    }
164:                    throw e;
165:                }
166:            }
167:
168:            static public char BeginToken() throws java.io.IOException {
169:                tokenBegin = -1;
170:                char c = readChar();
171:                tokenBegin = bufpos;
172:                return c;
173:            }
174:
175:            static protected void UpdateLineColumn(char c) {
176:                column++;
177:                if (prevCharIsLF) {
178:                    prevCharIsLF = false;
179:                    line += (column = 1);
180:                } else if (prevCharIsCR) {
181:                    prevCharIsCR = false;
182:                    if (c == '\n') {
183:                        prevCharIsLF = true;
184:                    } else {
185:                        line += (column = 1);
186:                    }
187:                }
188:                switch (c) {
189:                case '\r':
190:                    prevCharIsCR = true;
191:                    break;
192:                case '\n':
193:                    prevCharIsLF = true;
194:                    break;
195:                case '\t':
196:                    column--;
197:                    column += (8 - (column & 07));
198:                    break;
199:                default:
200:                    break;
201:                }
202:                bufline[bufpos] = line;
203:                bufcolumn[bufpos] = column;
204:            }
205:
206:            static public char readChar() throws java.io.IOException {
207:                if (inBuf > 0) {
208:                    --inBuf;
209:                    if (++bufpos == bufsize) {
210:                        bufpos = 0;
211:                    }
212:                    return buffer[bufpos];
213:                }
214:                if (++bufpos >= maxNextCharInd) {
215:                    FillBuff();
216:                }
217:                char c = buffer[bufpos];
218:                UpdateLineColumn(c);
219:                return (c);
220:            }
221:
222:            /**
223:             * @see #getEndColumn
224:             * @deprecated
225:             */
226:            static public int getColumn() {
227:                return bufcolumn[bufpos];
228:            }
229:
230:            /**
231:             * @see #getEndLine
232:             * @deprecated
233:             */
234:            static public int getLine() {
235:                return bufline[bufpos];
236:            }
237:
238:            static public int getEndColumn() {
239:                return bufcolumn[bufpos];
240:            }
241:
242:            static public int getEndLine() {
243:                return bufline[bufpos];
244:            }
245:
246:            static public int getBeginColumn() {
247:                return bufcolumn[tokenBegin];
248:            }
249:
250:            static public int getBeginLine() {
251:                return bufline[tokenBegin];
252:            }
253:
254:            static public void backup(int amount) {
255:                inBuf += amount;
256:                if ((bufpos -= amount) < 0) {
257:                    bufpos += bufsize;
258:                }
259:            }
260:
261:            public void ReInit(java.io.Reader dstream, int startline,
262:                    int startcolumn, int buffersize) {
263:                inputStream = dstream;
264:                line = startline;
265:                column = startcolumn - 1;
266:                if ((buffer == null) || (buffersize != buffer.length)) {
267:                    available = bufsize = buffersize;
268:                    buffer = new char[buffersize];
269:                    bufline = new int[buffersize];
270:                    bufcolumn = new int[buffersize];
271:                }
272:                prevCharIsLF = prevCharIsCR = false;
273:                tokenBegin = inBuf = maxNextCharInd = 0;
274:                bufpos = -1;
275:            }
276:
277:            public void ReInit(java.io.Reader dstream, int startline,
278:                    int startcolumn) {
279:                ReInit(dstream, startline, startcolumn, 4096);
280:            }
281:
282:            public void ReInit(java.io.Reader dstream) {
283:                ReInit(dstream, 1, 1, 4096);
284:            }
285:
286:            public void ReInit(java.io.InputStream dstream, int startline,
287:                    int startcolumn, int buffersize) {
288:                ReInit(new java.io.InputStreamReader(dstream), startline,
289:                        startcolumn, 4096);
290:            }
291:
292:            public void ReInit(java.io.InputStream dstream) {
293:                ReInit(dstream, 1, 1, 4096);
294:            }
295:
296:            public void ReInit(java.io.InputStream dstream, int startline,
297:                    int startcolumn) {
298:                ReInit(dstream, startline, startcolumn, 4096);
299:            }
300:
301:            static public String GetImage() {
302:                if (bufpos >= tokenBegin) {
303:                    return new String(buffer, tokenBegin, bufpos - tokenBegin
304:                            + 1);
305:                } else {
306:                    return new String(buffer, tokenBegin, bufsize - tokenBegin)
307:                            + new String(buffer, 0, bufpos + 1);
308:                }
309:            }
310:
311:            static public char[] GetSuffix(int len) {
312:                char[] ret = new char[len];
313:                if ((bufpos + 1) >= len) {
314:                    System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
315:                } else {
316:                    System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret,
317:                            0, len - bufpos - 1);
318:                    System.arraycopy(buffer, 0, ret, len - bufpos - 1,
319:                            bufpos + 1);
320:                }
321:                return ret;
322:            }
323:
324:            static public void Done() {
325:                buffer = null;
326:                bufline = null;
327:                bufcolumn = null;
328:            }
329:
330:            /**
331:             * Method to adjust line and column numbers for the start of a token.
332:             */
333:            static public void adjustBeginLineColumn(int newLine, int newCol) {
334:                int start = tokenBegin;
335:                int len;
336:                if (bufpos >= tokenBegin) {
337:                    len = bufpos - tokenBegin + inBuf + 1;
338:                } else {
339:                    len = bufsize - tokenBegin + bufpos + 1 + inBuf;
340:                }
341:                int i = 0;
342:                int j = 0;
343:                int k = 0;
344:                int nextColDiff = 0;
345:                int columnDiff = 0;
346:                while ((i < len)
347:                        && (bufline[j = start % bufsize] == bufline[k = ++start
348:                                % bufsize])) {
349:                    bufline[j] = newLine;
350:                    nextColDiff = (columnDiff + bufcolumn[k]) - bufcolumn[j];
351:                    bufcolumn[j] = newCol + columnDiff;
352:                    columnDiff = nextColDiff;
353:                    i++;
354:                }
355:                if (i < len) {
356:                    bufline[j] = newLine++;
357:                    bufcolumn[j] = newCol + columnDiff;
358:                    while (i++ < len) {
359:                        if (bufline[j = start % bufsize] != bufline[++start
360:                                % bufsize]) {
361:                            bufline[j] = newLine++;
362:                        } else {
363:                            bufline[j] = newLine;
364:                        }
365:                    }
366:                }
367:                line = bufline[j];
368:                column = bufcolumn[j];
369:            }
370:        }
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