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/**************************************************************/
/* ********************************************************** */
/* * * */
/* * INTERFACE FOR ALL ORDERING IMPLEMENTATIONS * */
/* * * */
/* * $Module: ORDER * */
/* * * */
/* * Copyright (C) 1997, 2000, 2001 MPI fuer Informatik * */
/* * * */
/* * This program is free software; you can redistribute * */
/* * it and/or modify it under the terms of the FreeBSD * */
/* * Licence. * */
/* * * */
/* * 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 LICENCE file * */
/* * for more details. * */
/* * * */
/* * * */
/* $Revision: 1.6 $ * */
/* $State: Exp $ * */
/* $Date: 2011-11-27 12:42:39 $ * */
/* $Author: weidenb $ * */
/* * * */
/* * Contact: * */
/* * Christoph Weidenbach * */
/* * MPI fuer Informatik * */
/* * Stuhlsatzenhausweg 85 * */
/* * 66123 Saarbruecken * */
/* * Email: spass@mpi-inf.mpg.de * */
/* * Germany * */
/* * * */
/* ********************************************************** */
/**************************************************************/
/* $RCSfile: order.h,v $ */
#ifndef _ORDER_
#define _ORDER_
/**************************************************************/
/* Includes */
/**************************************************************/
#include "term.h"
#include "context.h"
#include "flags.h"
#include "symbol.h"
/**************************************************************/
/* TYPES and GLOBAL VARIABLES */
/**************************************************************/
typedef enum { ord_UNCOMPARABLE,
ord_SMALLER_THAN,
ord_EQUAL,
ord_GREATER_THAN } ord_RESULT;
/* This array is used to count variable occurrences in two terms. */
/* It may be used by any available ordering. */
extern NAT ord_VARCOUNT[symbol__MAXSTANDARDVAR][2];
/* A precedence is needed in almost every ordering function. */
/* For performance reasons it is stored in a global variable, */
/* instead of passing it to all those functions, which are */
/* often recursive. Nevertheless this variable must not be */
/* set externally! */
extern PRECEDENCE ord_PRECEDENCE;
/**************************************************************/
/* INLINE FUNCTIONS */
/**************************************************************/
ord_RESULT ord_Uncomparable(void);
ord_RESULT ord_Equal(void);
ord_RESULT ord_GreaterThan(void);
ord_RESULT ord_SmallerThan(void);
BOOL ord_IsGreaterThan(ord_RESULT Res);
BOOL ord_IsNotGreaterThan(ord_RESULT Res);
BOOL ord_IsNotGreaterThanOrEqual(ord_RESULT Res);
BOOL ord_IsSmallerThan(ord_RESULT Res);
BOOL ord_IsNotSmallerThan(ord_RESULT Res);
BOOL ord_IsNotSmallerThanOrEqual(ord_RESULT Res);
BOOL ord_IsEqual(ord_RESULT Res);
BOOL ord_IsUncomparable(ord_RESULT Res);
/**************************************************************/
/* FUNCTIONS */
/**************************************************************/
ord_RESULT ord_Not(ord_RESULT);
ord_RESULT ord_CompareAux(TERM, TERM, FLAGSTORE, PRECEDENCE, BOOL);
ord_RESULT ord_Compare(TERM, TERM, FLAGSTORE, PRECEDENCE);
ord_RESULT ord_CompareSkolem(TERM, TERM, FLAGSTORE, PRECEDENCE);
ord_RESULT ord_ContCompare(VARCONT, TERM, VARCONT, TERM, FLAGSTORE, PRECEDENCE);
BOOL ord_CompareEqual(TERM, TERM, FLAGSTORE);
BOOL ord_ContGreater(VARCONT, TERM, VARCONT, TERM, FLAGSTORE, PRECEDENCE);
ord_RESULT ord_LiteralCompare(TERM,ord_RESULT,TERM,ord_RESULT,BOOL, FLAGSTORE, PRECEDENCE);
void ord_Print(ord_RESULT);
ord_RESULT ord_LiteralCompareAux(TERM, ord_RESULT, TERM, ord_RESULT, BOOL, BOOL, FLAGSTORE, PRECEDENCE);
void ord_CompareCountVars(TERM, int);
BOOL ord_CompareVarsSubset(TERM, TERM);
BOOL ord_ContGreaterSkolemSubst(VARCONT, TERM, VARCONT, TERM, FLAGSTORE, PRECEDENCE);
#endif
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