/** This character denotes the end of file */ public static final int YYEOF = -1; /** initial size of the lookahead buffer */ --- private static final int ZZ_BUFFERSIZE = ...; /** lexical states */ --- lexical states, charmap /* error codes */ private static final int ZZ_UNKNOWN_ERROR = 0; private static final int ZZ_NO_MATCH = 1; private static final int ZZ_PUSHBACK_2BIG = 2; /* error messages for the codes above */ private static final String ZZ_ERROR_MSG[] = { "Unkown internal scanner error", "Error: could not match input", "Error: pushback value was too large" }; --- isFinal list /** the input device */ private java.io.Reader zzReader; /** the current state of the DFA */ private int zzState; /** the current lexical state */ private int zzLexicalState = YYINITIAL; /** this buffer contains the current text to be matched and is the source of the yytext() string */ private char zzBuffer[] = new char[ZZ_BUFFERSIZE]; /** the textposition at the last accepting state */ private int zzMarkedPos; /** the current text position in the buffer */ private int zzCurrentPos; /** startRead marks the beginning of the yytext() string in the buffer */ private int zzStartRead; /** endRead marks the last character in the buffer, that has been read from input */ private int zzEndRead; /** number of newlines encountered up to the start of the matched text */ private int yyline; /** the number of characters up to the start of the matched text */ private int yychar; /** * the number of characters from the last newline up to the start of the * matched text */ private int yycolumn; /** * zzAtBOL == true <=> the scanner is currently at the beginning of a line */ private boolean zzAtBOL = true; /** zzAtEOF == true <=> the scanner is at the EOF */ private boolean zzAtEOF; /** denotes if the user-EOF-code has already been executed */ private boolean zzEOFDone; /** the stack of open (nested) input streams to read from */ private java.util.Stack zzStreams = new java.util.Stack(); /** * inner class used to store info for nested * input streams */ private static final class ZzFlexStreamInfo { java.io.Reader zzReader; int zzEndRead; int zzStartRead; int zzCurrentPos; int zzMarkedPos; int yyline; int yycolumn; char [] zzBuffer; boolean zzAtEOF; boolean zzEOFDone; /** sets all values stored in this class */ ZzFlexStreamInfo(java.io.Reader zzReader, int zzEndRead, int zzStartRead, int zzCurrentPos, int zzMarkedPos, char [] zzBuffer, boolean zzAtEOF, int yyline, int yycolumn) { this.zzReader = zzReader; this.zzEndRead = zzEndRead; this.zzStartRead = zzStartRead; this.zzCurrentPos = zzCurrentPos; this.zzMarkedPos = zzMarkedPos; this.zzBuffer = zzBuffer; this.zzAtEOF = zzAtEOF; this.zzEOFDone = zzEOFDone; this.yyline = yyline; this.yycolumn = yycolumn; } } --- user class code /** * Creates a new scanner * There is also a java.io.InputStream version of this constructor. * * @param in the java.io.Reader to read input from. */ --- constructor declaration /** * Refills the input buffer. * * @return false, iff there was new input. * * @exception java.io.IOException if any I/O-Error occurs */ private boolean zzRefill() throws java.io.IOException { /* first: make room (if you can) */ if (zzStartRead > 0) { System.arraycopy(zzBuffer, zzStartRead, zzBuffer, 0, zzEndRead-zzStartRead); /* translate stored positions */ zzEndRead-= zzStartRead; zzCurrentPos-= zzStartRead; zzMarkedPos-= zzStartRead; zzStartRead = 0; } /* is the buffer big enough? */ if (zzCurrentPos >= zzBuffer.length) { /* if not: blow it up */ char newBuffer[] = new char[zzCurrentPos*2]; System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length); zzBuffer = newBuffer; } /* finally: fill the buffer with new input */ int numRead = zzReader.read(zzBuffer, zzEndRead, zzBuffer.length-zzEndRead); if (numRead > 0) { zzEndRead+= numRead; return false; } // unlikely but not impossible: read 0 characters, but not at end of stream if (numRead == 0) { int c = zzReader.read(); if (c == -1) { return true; } else { zzBuffer[zzEndRead++] = (char) c; return false; } } // numRead < 0) return true; } /** * Closes the input stream. */ public final void yyclose() throws java.io.IOException { zzAtEOF = true; /* indicate end of file */ zzEndRead = zzStartRead; /* invalidate buffer */ if (zzReader != null) zzReader.close(); } /** * Stores the current input stream on a stack, and * reads from a new stream. Lexical state, line, * char, and column counting remain untouched. * * The current input stream can be restored with * yypopstream (usually in an <> action). * * @param reader the new input stream to read from * * @see #yypopStream() */ public final void yypushStream(java.io.Reader reader) { zzStreams.push( new ZzFlexStreamInfo(zzReader, zzEndRead, zzStartRead, zzCurrentPos, zzMarkedPos, zzBuffer, zzAtEOF, yyline, yycolumn) ); zzAtEOF = false; zzBuffer = new char[ZZ_BUFFERSIZE]; zzReader = reader; zzEndRead = zzStartRead = 0; zzCurrentPos = zzMarkedPos = 0; yyline = yycolumn = 0; } /** * Closes the current input stream and continues to * read from the one on top of the stream stack. * * @throws java.util.EmptyStackException * if there is no further stream to read from. * * @throws java.io.IOException * if there was an error in closing the stream. * * @see #yypushStream(java.io.Reader) */ public final void yypopStream() throws java.io.IOException { zzReader.close(); ZzFlexStreamInfo s = (ZzFlexStreamInfo) zzStreams.pop(); zzBuffer = s.zzBuffer; zzReader = s.zzReader; zzEndRead = s.zzEndRead; zzStartRead = s.zzStartRead; zzCurrentPos = s.zzCurrentPos; zzMarkedPos = s.zzMarkedPos ; zzAtEOF = s.zzAtEOF; zzEOFDone = s.zzEOFDone; yyline = s.yyline; yycolumn = s.yycolumn; } /** * Returns true iff there are still streams left * to read from on the stream stack. */ public final boolean yymoreStreams() { return !zzStreams.isEmpty(); } /** * Resets the scanner to read from a new input stream. * Does not close the old reader. * * All internal variables are reset, the old input stream * cannot be reused (internal buffer is discarded and lost). * Lexical state is set to ZZ_INITIAL. * * @param reader the new input stream * * @see #yypushStream(java.io.Reader) * @see #yypopStream() */ public final void yyreset(java.io.Reader reader) { zzReader = reader; zzAtBOL = true; zzAtEOF = false; zzEOFDone = false; zzEndRead = zzStartRead = 0; zzCurrentPos = zzMarkedPos = 0; yyline = yychar = yycolumn = 0; zzLexicalState = YYINITIAL; } /** * Returns the current lexical state. */ public final int yystate() { return zzLexicalState; } /** * Enters a new lexical state * * @param newState the new lexical state */ public final void yybegin(int newState) { zzLexicalState = newState; } /** * Returns the text matched by the current regular expression. */ public final String yytext() { return new String( zzBuffer, zzStartRead, zzMarkedPos-zzStartRead ); } /** * Returns the character at position pos from the * matched text. * * It is equivalent to yytext().charAt(pos), but faster * * @param pos the position of the character to fetch. * A value from 0 to yylength()-1. * * @return the character at position pos */ public final char yycharat(int pos) { return zzBuffer[zzStartRead+pos]; } /** * Returns the length of the matched text region. */ public final int yylength() { return zzMarkedPos-zzStartRead; } /** * Reports an error that occured while scanning. * * In a wellformed scanner (no or only correct usage of * yypushback(int) and a match-all fallback rule) this method * will only be called with things that "Can't Possibly Happen". * If this method is called, something is seriously wrong * (e.g. a JFlex bug producing a faulty scanner etc.). * * Usual syntax/scanner level error handling should be done * in error fallback rules. * * @param errorCode the code of the errormessage to display */ --- zzScanError declaration String message; try { message = ZZ_ERROR_MSG[errorCode]; } catch (ArrayIndexOutOfBoundsException e) { message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR]; } --- throws clause } /** * Pushes the specified amount of characters back into the input stream. * * They will be read again by then next call of the scanning method * * @param number the number of characters to be read again. * This number must not be greater than yylength()! */ --- yypushback decl (contains zzScanError exception) if ( number > yylength() ) zzScanError(ZZ_PUSHBACK_2BIG); zzMarkedPos -= number; } --- zzDoEOF /** * Resumes scanning until the next regular expression is matched, * the end of input is encountered or an I/O-Error occurs. * * @return the next token * @exception java.io.IOException if any I/O-Error occurs */ --- yylex declaration int zzInput; int zzAction; --- local declarations while (true) { // cached fields: int zzCurrentPosL; int zzMarkedPosL = zzMarkedPos; int zzEndReadL = zzEndRead; char [] zzBufferL = zzBuffer; char [] zzCMapL = ZZ_CMAP; --- start admin (line, char, col count) zzAction = -1; zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL; --- start admin (lexstate etc) zzForAction: { while (true) { --- next input, line, col, char count, next transition, isFinal action zzAction = zzState; zzMarkedPosL = zzCurrentPosL; --- line count update } } } // store back cached position zzMarkedPos = zzMarkedPosL; --- char count update --- actions default: if (zzInput == YYEOF && zzStartRead == zzCurrentPos) { zzAtEOF = true; --- eofvalue } else { --- no match } } } } --- main }