45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
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* Scyther : An automatic verifier for security protocols.
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* Copyright (C) 2007-2020 Cas Cremers
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef MGU
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#define MGU
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#include "term.h"
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#include "termlist.h"
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//! A special constant do denote failure.
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/**
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* \c NULL already denotes equality, so an extra signal is needed to
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* denote that a unification fails.
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* \todo Find a portable solution for this \c MGUFAIL constant:
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* maybe a pointer to some special constant.
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*/
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#define MGUFAIL (Termlist) -1
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void termlistSubstReset (Termlist tl);
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int checkRoletermMatch (const Term t1, const Term t2, const Termlist tl);
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// The new iteration methods
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int unify (Term t1, Term t2, Termlist tl, int (*callback) (), void *state);
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int
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subtermUnify (Term tbig, Term tsmall, Termlist tl, Termlist keylist,
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int (*callback) (), void *state);
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#endif
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