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- /* The following code was generated by JFlex 1.4.3 on 24.05.12 11:19 */
- /*
- Einfache Demonstration des Java-Lexers Flex.
- */
- import java.io.*;
- /**
- * This class is a scanner generated by
- * <a href="http://www.jflex.de/">JFlex</a> 1.4.3
- * on 24.05.12 11:19 from the specification file
- * <tt>/home/dex/DevWorkspace/java/jflex-1.4.3/jflex-1.4.3/bin/daten/summe.flex</tt>
- */
- class Summe {
- /** 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 = 16384;
- /** lexical states */
- public static final int YYINITIAL = 0;
- /**
- * ZZ_LEXSTATE[l] is the state in the DFA for the lexical state l
- * ZZ_LEXSTATE[l+1] is the state in the DFA for the lexical state l
- * at the beginning of a line
- * l is of the form l = 2*k, k a non negative integer
- */
- private static final int ZZ_LEXSTATE[] = {
- 0, 0
- };
- /**
- * Translates characters to character classes
- */
- private static final String ZZ_CMAP_PACKED =
- "\11\0\1\10\1\7\1\0\1\10\1\6\22\0\1\10\11\0\1\5"+
- "\1\1\1\0\1\1\1\3\1\4\12\2\uffc6\0";
- /**
- * Translates characters to character classes
- */
- private static final char [] ZZ_CMAP = zzUnpackCMap(ZZ_CMAP_PACKED);
- /**
- * Translates DFA states to action switch labels.
- */
- private static final int [] ZZ_ACTION = zzUnpackAction();
- private static final String ZZ_ACTION_PACKED_0 =
- "\1\0\2\1\1\2\1\1\2\3\2\0\1\2\1\0";
- private static int [] zzUnpackAction() {
- int [] result = new int[11];
- int offset = 0;
- offset = zzUnpackAction(ZZ_ACTION_PACKED_0, offset, result);
- return result;
- }
- private static int zzUnpackAction(String packed, int offset, int [] result) {
- int i = 0; /* index in packed string */
- int j = offset; /* index in unpacked array */
- int l = packed.length();
- while (i < l) {
- int count = packed.charAt(i++);
- int value = packed.charAt(i++);
- do result[j++] = value; while (--count > 0);
- }
- return j;
- }
- /**
- * Translates a state to a row index in the transition table
- */
- private static final int [] ZZ_ROWMAP = zzUnpackRowMap();
- private static final String ZZ_ROWMAP_PACKED_0 =
- "\0\0\0\11\0\22\0\33\0\44\0\55\0\11\0\66"+
- "\0\77\0\66\0\110";
- private static int [] zzUnpackRowMap() {
- int [] result = new int[11];
- int offset = 0;
- offset = zzUnpackRowMap(ZZ_ROWMAP_PACKED_0, offset, result);
- return result;
- }
- private static int zzUnpackRowMap(String packed, int offset, int [] result) {
- int i = 0; /* index in packed string */
- int j = offset; /* index in unpacked array */
- int l = packed.length();
- while (i < l) {
- int high = packed.charAt(i++) << 16;
- result[j++] = high | packed.charAt(i++);
- }
- return j;
- }
- /**
- * The transition table of the DFA
- */
- private static final int [] ZZ_TRANS = zzUnpackTrans();
- private static final String ZZ_TRANS_PACKED_0 =
- "\1\2\1\3\1\4\1\2\1\5\1\2\1\6\2\7"+
- "\13\0\1\4\10\0\1\4\1\10\12\0\1\11\12\0"+
- "\1\7\3\0\1\12\6\0\5\11\1\13\7\11\1\7"+
- "\1\13\3\11";
- private static int [] zzUnpackTrans() {
- int [] result = new int[81];
- int offset = 0;
- offset = zzUnpackTrans(ZZ_TRANS_PACKED_0, offset, result);
- return result;
- }
- private static int zzUnpackTrans(String packed, int offset, int [] result) {
- int i = 0; /* index in packed string */
- int j = offset; /* index in unpacked array */
- int l = packed.length();
- while (i < l) {
- int count = packed.charAt(i++);
- int value = packed.charAt(i++);
- value--;
- do result[j++] = value; while (--count > 0);
- }
- return j;
- }
- /* 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"
- };
- /**
- * ZZ_ATTRIBUTE[aState] contains the attributes of state <code>aState</code>
- */
- private static final int [] ZZ_ATTRIBUTE = zzUnpackAttribute();
- private static final String ZZ_ATTRIBUTE_PACKED_0 =
- "\1\0\1\11\4\1\1\11\2\0\1\1\1\0";
- private static int [] zzUnpackAttribute() {
- int [] result = new int[11];
- int offset = 0;
- offset = zzUnpackAttribute(ZZ_ATTRIBUTE_PACKED_0, offset, result);
- return result;
- }
- private static int zzUnpackAttribute(String packed, int offset, int [] result) {
- int i = 0; /* index in packed string */
- int j = offset; /* index in unpacked array */
- int l = packed.length();
- while (i < l) {
- int count = packed.charAt(i++);
- int value = packed.charAt(i++);
- do result[j++] = value; while (--count > 0);
- }
- return j;
- }
- /** 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;
- /* user code: */
- double s = 0;
- public static void main(String args[]) throws IOException {
- Summe scanner = new Summe(System.in);
- scanner.yylex();
- System.out.println("Summe = " + scanner.s);
- }
- /**
- * 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.
- */
- Summe(java.io.Reader in) {
- this.zzReader = in;
- }
- /**
- * Creates a new scanner.
- * There is also java.io.Reader version of this constructor.
- *
- * @param in the java.io.Inputstream to read input from.
- */
- Summe(java.io.InputStream in) {
- this(new java.io.InputStreamReader(in));
- }
- /**
- * Unpacks the compressed character translation table.
- *
- * @param packed the packed character translation table
- * @return the unpacked character translation table
- */
- private static char [] zzUnpackCMap(String packed) {
- char [] map = new char[0x10000];
- int i = 0; /* index in packed string */
- int j = 0; /* index in unpacked array */
- while (i < 34) {
- int count = packed.charAt(i++);
- char value = packed.charAt(i++);
- do map[j++] = value; while (--count > 0);
- }
- return map;
- }
- /**
- * Refills the input buffer.
- *
- * @return <code>false</code>, 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();
- }
- /**
- * 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
- * <b>cannot</b> be reused (internal buffer is discarded and lost).
- * Lexical state is set to <tt>ZZ_INITIAL</tt>.
- *
- * @param reader the new input stream
- */
- 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 <tt>pos</tt> 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
- */
- private void zzScanError(int errorCode) {
- String message;
- try {
- message = ZZ_ERROR_MSG[errorCode];
- }
- catch (ArrayIndexOutOfBoundsException e) {
- message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR];
- }
- throw new Error(message);
- }
- /**
- * 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()!
- */
- public void yypushback(int number) {
- if ( number > yylength() )
- zzScanError(ZZ_PUSHBACK_2BIG);
- zzMarkedPos -= number;
- }
- /**
- * 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
- */
- public Double yylex() throws java.io.IOException {
- int zzInput;
- int zzAction;
- // cached fields:
- int zzCurrentPosL;
- int zzMarkedPosL;
- int zzEndReadL = zzEndRead;
- char [] zzBufferL = zzBuffer;
- char [] zzCMapL = ZZ_CMAP;
- int [] zzTransL = ZZ_TRANS;
- int [] zzRowMapL = ZZ_ROWMAP;
- int [] zzAttrL = ZZ_ATTRIBUTE;
- while (true) {
- zzMarkedPosL = zzMarkedPos;
- zzAction = -1;
- zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL;
- zzState = ZZ_LEXSTATE[zzLexicalState];
- zzForAction: {
- while (true) {
- if (zzCurrentPosL < zzEndReadL)
- zzInput = zzBufferL[zzCurrentPosL++];
- else if (zzAtEOF) {
- zzInput = YYEOF;
- break zzForAction;
- }
- else {
- // store back cached positions
- zzCurrentPos = zzCurrentPosL;
- zzMarkedPos = zzMarkedPosL;
- boolean eof = zzRefill();
- // get translated positions and possibly new buffer
- zzCurrentPosL = zzCurrentPos;
- zzMarkedPosL = zzMarkedPos;
- zzBufferL = zzBuffer;
- zzEndReadL = zzEndRead;
- if (eof) {
- zzInput = YYEOF;
- break zzForAction;
- }
- else {
- zzInput = zzBufferL[zzCurrentPosL++];
- }
- }
- int zzNext = zzTransL[ zzRowMapL[zzState] + zzCMapL[zzInput] ];
- if (zzNext == -1) break zzForAction;
- zzState = zzNext;
- int zzAttributes = zzAttrL[zzState];
- if ( (zzAttributes & 1) == 1 ) {
- zzAction = zzState;
- zzMarkedPosL = zzCurrentPosL;
- if ( (zzAttributes & 8) == 8 ) break zzForAction;
- }
- }
- }
- // store back cached position
- zzMarkedPos = zzMarkedPosL;
- switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
- case 3:
- { /* Ignorieren */
- }
- case 4: break;
- case 2:
- { System.out.println("Zahl " + yytext());
- s = s + Double.parseDouble(yytext());
- }
- case 5: break;
- case 1:
- { throw new RuntimeException("Unerlaubtes Zeichen \"" + yytext() + "\".");
- }
- case 6: break;
- default:
- if (zzInput == YYEOF && zzStartRead == zzCurrentPos) {
- zzAtEOF = true;
- return null;
- }
- else {
- zzScanError(ZZ_NO_MATCH);
- }
- }
- }
- }
- }
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