/*****************************************************/
/*          This java file is a part of the          */
/*                                                   */
/*           -  Plouf's Java IRC Client  -           */
/*                                                   */
/*   Copyright (C)  2002 - 2004 Philippe Detournay   */
/*                                                   */
/*         All contacts : theplouf@yahoo.com         */
/*                                                   */
/*  PJIRC 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; version 2 or later of  */
/*  the License.                                     */
/*                                                   */
/*  PJIRC 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 PJIRC; if      */
/*  not, write to the Free Software Foundation,      */
/*  Inc., 59 Temple Place, Suite 330, Boston,        */
/*  MA  02111-1307  USA                              */
/*                                                   */
/*****************************************************/

package irc;

import java.util.Vector;

/**
 * String parser.
 */
public class StringParser {
	/**
	 * Trim the given string, without removing non-printable characters.
	 * 
	 * @param t
	 *          string to trim.
	 * @return trimmed string.
	 */
	public static String trim(String t) {
		int a = 0;
		while ((a < t.length()) && (t.charAt(a) == ' '))
			a++;
		if (a == t.length())
			return "";
		int b = t.length() - 1;
		while ((b >= 0) && (t.charAt(b) == ' '))
			b--;
		if (b < 0)
			return "";
		return t.substring(a, b + 1);
	}

	private int indexOf(String s, char toFind) {
		int deep = 0;
		for (int i = 0; i < s.length(); i++) {
			char c = s.charAt(i);
			if ((deep == 0) && (c == toFind))
				return i;
			if (c == '"')
				deep = 1 - deep;
			if (c == '\'')
				deep = 1 - deep;
		}
		return -1;
	}

	/**
	 * Parse the string.
	 * 
	 * @param line
	 *          string to parse.
	 * @return arrays of strings.
	 */
	public String[] parseString(String line) {
		Vector res = new Vector();
		while (line.length() != 0) {
			int pos = indexOf(line, ' ');
			if (pos == -1) {
				res.insertElementAt(line, res.size());
				line = "";
			} else {
				String part = trim(line.substring(0, pos));
				line = trim(line.substring(pos));
				res.insertElementAt(part, res.size());
			}
		}

		String[] param = new String[res.size()];
		for (int i = 0; i < res.size(); i++)
			param[i] = (String) res.elementAt(i);
		return param;

	}

}