/*
* Open Source Physics software is free software as described near the bottom of this code file.
*
* For additional information and documentation on Open Source Physics please see:
* <http://www.opensourcephysics.org/>
*/
/* The following code was generated by JFlex 1.4.1 on 8/03/06 20:58 */
/* BrowserCommandLexer.java is a generated file. You probably want to
* edit BrowserCommandLexer to make changes. Use JFlex to generate it.
* JFlex may be obtained from
* <a href="http://www.jflex.de">the JFlex website</a>.
* Jflex 1.4 or later is required.
* Run:<br>
* jflex BrowserCommandLexer<br>
* You will then have a file called BrowserCommandLexer.java
*/
/*
* Tokenize a command line into application and arguments.
* Copyright (C) 2001-2004 Stephen Ostermiller
* http://ostermiller.org/contact.pl?regarding=Java+Utilities
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* See COPYING.TXT for details.
*/
package org.opensourcephysics.desktop.ostermiller;
import java.io.IOException;
/**
* Tokenize a command line into application and arguments.
*
* @author Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities
* @since ostermillerutils 1.00.00
*/
class BrowserCommandLexer {
/** This character denotes the end of file */
private static final int YYEOF = -1;
/** initial size of the lookahead buffer */
private static final int ZZ_BUFFERSIZE = 16384;
/** lexical states */
private static final int YYINITIAL = 0;
/**
/**
* Translates characters to character classes
*/
private static final String ZZ_CMAP_PACKED = "\11\0\2\2\1\0\2\2\22\0\1\2\1\0\1\3\36\0\1\0\32\0\1\1\uffa3\0"; //$NON-NLS-1$
/**
* 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 = "\2\1\2\2\1\1\3\0\1\3\1\1\1\3\1\0\2\3"; //$NON-NLS-1$
private static int[] zzUnpackAction() {
int[] result = new int[14];
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\4\0\10\0\14\0\20\0\10\0\24\0\30"+ //$NON-NLS-1$
"\0\4\0\34\0\20\0\40\0\14\0\30"; //$NON-NLS-1$
private static int[] zzUnpackRowMap() {
int[] result = new int[14];
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\5\1\2\1\6\1\0\5\2"+ //$NON-NLS-1$
"\4\0\1\5\1\7\1\10\1\11\1\5\1\12\1\5"+ //$NON-NLS-1$
"\1\13\1\10\1\14\1\10\1\15\1\5\1\7\1\10"+ //$NON-NLS-1$
"\1\13\1\10\1\14\1\10\1\16"; //$NON-NLS-1$
private static int[] zzUnpackTrans() {
int[] result = new int[36];
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;
/* error messages for the codes above */
private static final String ZZ_ERROR_MSG[] = {
"Unkown internal scanner error", //$NON-NLS-1$
"Error: could not match input", //$NON-NLS-1$
"Error: pushback value was too large" //$NON-NLS-1$
};
/**
* 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 = "\3\1\1\11\1\1\3\0\3\1\1\0\1\11\1\1"; //$NON-NLS-1$
private static int[] zzUnpackAttribute() {
int[] result = new int[14];
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 textposition at the last state to be included in yytext */
//private int zzPushbackPos;
/** 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;
/** zzAtEOF == true <=> the scanner is at the EOF */
private boolean zzAtEOF;
/**
* Return the next token from the browser command.
*
* @return the next token
* @throws IOException if an error occurs while reading the command.
*/
public String getNextToken() throws IOException {
return getToken();
}
private static String unescape(String s) {
StringBuffer sb = new StringBuffer(s.length());
for(int i = 0; i<s.length(); i++) {
if((s.charAt(i)=='\\')&&(i<s.length())) {
i++;
}
sb.append(s.charAt(i));
}
return sb.toString();
}
/**
* 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.
*/
BrowserCommandLexer(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.
*/
BrowserCommandLexer(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<26) {
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;
//zzPushbackPos -= 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) {
return true;
}
zzEndRead += numRead;
return false;
}
/**
* Returns the text matched by the current regular expression.
*/
private final String yytext() {
return new String(zzBuffer, zzStartRead, 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);
}
/**
* 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
*/
private String getToken() 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 = 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;
}
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 : {
return unescape(yytext().substring(1, yytext().length()-1));
}
case 4 :
break;
case 2 : {}
case 5 :
break;
case 1 : {
return unescape(yytext());
}
case 6 :
break;
default :
if((zzInput==YYEOF)&&(zzStartRead==zzCurrentPos)) {
zzAtEOF = true;
return null;
}
zzScanError(ZZ_NO_MATCH);
}
}
}
}
/*
* Open Source Physics software is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public License (GPL) as
* published by the Free Software Foundation; either version 2 of the License,
* or(at your option) any later version.
* Code that uses any portion of the code in the org.opensourcephysics package
* or any subpackage (subdirectory) of this package must must also be be released
* under the GNU GPL license.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
* or view the license online at http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2007 The Open Source Physics project
* http://www.opensourcephysics.org
*/