/*
Protocol Definition Language
Copyright (C) 2003-2006 Marcus Andersson
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package net.sf.nmedit.jpdl;
public class ConstantMatcher extends Matcher
{
public ConstantMatcher(int value, int size,
Condition condition, boolean optional)
{
super(condition, optional);
this.value = value;
this.size = size;
}
public boolean match(Protocol protocol, BitStream data,
Packet result, int reserved)
{
trace(protocol);
return data.isAvailable(size + reserved) && data.getInt(size) == value;
}
public boolean apply(Protocol protocol, Packet packet,
IntStream data, BitStream result)
{
trace(protocol);
result.append(value, size);
return true;
}
public int minimumSize()
{
if (isOptional()) {
return 0;
}
else {
return size;
}
}
private int value;
private int size;
public String getSource()
{
return (isOptional() ? "?":"") + value+":"+size;
}
}