scyther/src/mgu.h
2018-12-24 14:53:20 +01:00

45 lines
1.5 KiB
C

/*
* Scyther : An automatic verifier for security protocols.
* Copyright (C) 2007-2013 Cas Cremers
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef MGU
#define MGU
#include "term.h"
#include "termlist.h"
//! A special constant do denote failure.
/**
* \c NULL already denotes equality, so an extra signal is needed to
* denote that a unification fails.
* \todo Find a portable solution for this \c MGUFAIL constant:
* maybe a pointer to some special constant.
*/
#define MGUFAIL (Termlist) -1
void termlistSubstReset (Termlist tl);
int checkRoletermMatch (const Term t1, const Term t2, const Termlist tl);
// The new iteration methods
int unify (Term t1, Term t2, Termlist tl, int (*callback) (), void *state);
int
subtermUnify (Term tbig, Term tsmall, Termlist tl, Termlist keylist,
int (*callback) (), void *state);
#endif