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/*-----------------------------------------------------------------------
File : ccl_rewrite.h
Author: Stephan Schulz
Contents
Functions for rewriting terms and clauses with clause sets.
Copyright 1998-2011 by the author.
This code is released under the GNU General Public Licence and
the GNU Lesser General Public License.
See the file COPYING in the main E directory for details..
Run "eprover -h" for contact information.
Changes
<1> Tue May 26 19:47:52 MET DST 1998
New
-----------------------------------------------------------------------*/
#ifndef CCL_REWRITE
#define CCL_REWRITE
#include <cte_replace.h>
#include <ccl_pdtrees.h>
#include <ccl_clausefunc.h>
#include <ccl_subterm_index.h>
/*---------------------------------------------------------------------*/
/* Data type declarations */
/*---------------------------------------------------------------------*/
/* Collect all necessary information for rewriting into one structure */
typedef struct rw_desc_cell
{
OCB_p ocb;
TB_p bank;
ClauseSet_p *demods;
SysDate demod_date;
RewriteLevel level;
bool prefer_general;
bool sos_rewritten; /* Return value! */
}RWDescCell, *RWDesc_p;
/*---------------------------------------------------------------------*/
/* Exported Functions and Variables */
/*---------------------------------------------------------------------*/
#define RWDescCellAlloc() (RWDescCell*)SizeMalloc(sizeof(RWDescCell))
#define RWDescCellFree(junk) SizeFree(junk, sizeof(RWDescCell))
extern long RewriteAttempts;
extern long RewriteSuccesses;
extern long RewriteUnboundVarFails;
extern long BWRWMatchAttempts;
extern long BWRWMatchSuccesses;
Term_p TermComputeLINormalform(OCB_p ocb, TB_p bank, Term_p term,
ClauseSet_p *demodulators,
RewriteLevel level,
bool prefer_general,
bool restricted_rw);
bool ClauseComputeLINormalform(OCB_p ocb, TB_p bank, Clause_p
clause, ClauseSet_p *demodulators,
RewriteLevel level, bool
prefer_general);
long ClauseSetComputeLINormalform(OCB_p ocb, TB_p bank, ClauseSet_p
set, ClauseSet_p *demodulators,
RewriteLevel level, bool
prefer_general);
bool FindRewritableClauses(OCB_p ocb, ClauseSet_p set,
PStack_p results, Clause_p
new_demod, SysDate nf_date);
long FindRewritableClausesIndexed(OCB_p ocb, SubtermIndex_p index,
PStack_p stack, Clause_p new_demod,
SysDate nf_date);
#endif
/*---------------------------------------------------------------------*/
/* End of File */
/*---------------------------------------------------------------------*/
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