/**
Copyright (C) 2010 Tobias Domhan
This file is part of AndObjViewer.
AndObjViewer 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 3 of the License, or
(at your option) any later version.
AndObjViewer 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 AndObjViewer. If not, see .
*/
//package edu.dhbw.andobjviewer.parser;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
class Util {
private static final Pattern trimWhiteSpaces = Pattern.compile("[\\s]+");
private static final Pattern removeInlineComments = Pattern.compile("#");
private static final Pattern splitBySpace = Pattern.compile(" ");
/**
* Trims down obj files, so that they may be parsed faster later on.
* Remove uneccessary whitespaces, comments etc.
* @param in stream to be trimmed
* @param out the resulting trimmed stream
*/
public static void trim(BufferedReader in, BufferedWriter out) throws IOException {
String line;
out.write("#trimmed\n");
for (line = in.readLine();
line != null;
line = in.readLine()) {
line = getCanonicalLine(line);
if(line.length()>0) {
out.write(line.trim());
out.write('\n');
}
}
in.close();
out.close();
}
/**
* returns a canonical line of a obj or mtl file.
* e.g. it removes multiple whitespaces or comments from the given string.
* @param line
* @return
*/
public static final String getCanonicalLine(String line) {
line = trimWhiteSpaces.matcher(line).replaceAll(" ");
if(line.contains("#")) {
String[] parts = removeInlineComments.split(line);
if(parts.length > 0)
line = parts[0];//remove inline comments
}
return line;
}
}