/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.shell.bjorne;
class CharIterator {
private CharSequence str;
private int pos, start, limit;
public CharIterator(CharSequence str) {
this.str = str;
this.start = pos = 0;
this.limit = str.length();
}
public CharIterator(CharSequence str, int start, int limit) {
this.str = str;
this.start = pos = start;
this.limit = limit;
}
public int nextCh() {
return (pos >= limit) ? -1 : str.charAt(pos++);
}
public int peekCh() {
return (pos >= limit) ? -1 : str.charAt(pos);
}
public int lastCh() {
return (pos > start) ? str.charAt(pos - 1) : -1;
}
public int nosRemaining() {
return limit - pos;
}
}