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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*
*/
package com.sun.j3d.loaders.objectfile;
import java.io.IOException;
import java.io.Reader;
import java.io.StreamTokenizer;
import com.sun.j3d.loaders.ParsingErrorException;
class ObjectFileParser extends StreamTokenizer {
private static final char BACKSLASH = '\\';
/**
* setup
*
* Sets up StreamTokenizer for reading ViewPoint .obj file format.
*/
void setup() {
resetSyntax();
eolIsSignificant(true);
lowerCaseMode(true);
// All printable ascii characters
wordChars('!', '~');
// Comment from ! to end of line
commentChar('!');
whitespaceChars(' ', ' ');
whitespaceChars('\n', '\n');
whitespaceChars('\r', '\r');
whitespaceChars('\t', '\t');
// These characters returned as tokens
ordinaryChar('#');
ordinaryChar('/');
ordinaryChar(BACKSLASH);
} // End of setup
/**
* getToken
*
* Gets the next token from the stream. Puts one of the four
* constants (TT_WORD, TT_NUMBER, TT_EOL, or TT_EOF) or the token value
* for single character tokens into ttype. Handles backslash
* continuation of lines.
*/
void getToken() throws ParsingErrorException {
int t;
boolean done = false;
try {
do {
t = nextToken();
if (t == BACKSLASH) {
t = nextToken();
if (ttype != TT_EOL) done = true;
} else done = true;
} while (!done);
}
catch (IOException e) {
throw new ParsingErrorException(
"IO error on line " + lineno() + ": " + e.getMessage());
}
} // End of getToken
void printToken() {
switch (ttype) {
case TT_EOL:
System.out.println("Token EOL");
break;
case TT_EOF:
System.out.println("Token EOF");
break;
case TT_WORD:
System.out.println("Token TT_WORD: " + sval);
break;
case '/':
System.out.println("Token /");
break;
case BACKSLASH:
System.out.println("Token " + BACKSLASH);
break;
case '#':
System.out.println("Token #");
break;
}
} // end of printToken
/**
* skipToNextLine
*
* Skips all tokens on the rest of this line. Doesn't do anything if
* We're already at the end of a line
*/
void skipToNextLine() throws ParsingErrorException {
while (ttype != TT_EOL && ttype != -1 /* issue 587*/) {
getToken();
}
} // end of skipToNextLine
/**
* getNumber
*
* Gets a number from the stream. Note that we don't recognize
* numbers in the tokenizer automatically because numbers might be in
* scientific notation, which isn't processed correctly by
* StreamTokenizer. The number is returned in nval.
*/
void getNumber() throws ParsingErrorException {
int t;
try {
getToken();
if (ttype != TT_WORD)
throw new ParsingErrorException("Expected number on line " + lineno());
nval = (Double.valueOf(sval)).doubleValue();
}
catch (NumberFormatException e) {
throw new ParsingErrorException(e.getMessage());
}
} // end of getNumber
// ObjectFileParser constructor
ObjectFileParser(Reader r) {
super(r);
setup();
} // end of ObjectFileParser
} // End of file ObjectFileParser.java