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/**************************************************************/
/* ********************************************************** */
/* * * */
/* * SIGNATURE TABLE * */
/* * * */
/* * $Module: TABLE * */
/* * * */
/* * Copyright (C) 1999, 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: 1.2 $ * */
/* $State: Exp $ * */
/* $Date: 2010-02-22 14:09:59 $ * */
/* $Author: weidenb $ * */
/* * * */
/* * Contact: * */
/* * Christoph Weidenbach * */
/* * MPI fuer Informatik * */
/* * Stuhlsatzenhausweg 85 * */
/* * 66123 Saarbruecken * */
/* * Email: spass@mpi-inf.mpg.de * */
/* * Germany * */
/* * * */
/* ********************************************************** */
/**************************************************************/
/* module manages signature tables i. e. tables of terms (including the empty */
/* term NULL) where the lookup key is the tuple of top symbol index and */
/* arguments' equivalence classes with respect to a partition p, the */
/* _p-signature_ (sigtab_Index(top symbol), [arg 1] , ..., [arg n] ) */
/* p p */
#ifndef _TABLE_
#define _TABLE_
/**************************************************************/
/* Includes */
/**************************************************************/
#include "term.h"
#include "partition.h"
/**************************************************************/
/* Basic types */
/**************************************************************/
typedef struct termarray {
TERM term;
int stamp;
struct termarray *child;
} *TERMARRAY;
typedef struct table {
TERMARRAY ta, *pos;
int *posstamp, stampcounter, opbound, varbound, termbound;
}
*TABLE;
/* a signature table is an "array of terms allocated by need" (i. e. a tree */
/* where the nodes of the same layer represent array entries with the same */
/* dimension), an array of positions in this "array", stamps for the */
/* positions, the stamp counter and bounds for the operator symbol, variable */
/* and term indices of the terms to be stored in the signature table (i. e. */
/* for every such term its top symbol index has to be in [1, opbound] and the */
/* term numbers of its arguments in [0, termbound] - or its variable index in */
/* [1, varbound] if it is a variable) */
/**************************************************************/
/* Prototypes */
/**************************************************************/
TABLE table_Null(void);
TABLE table_Create(int, int, int);
void table_Free(TABLE);
TABLE table_Init(TABLE, int, int, int);
TERM table_QueryAndEnter(TABLE, PARTITION, TERM);
TABLE table_Delete(TABLE, TERM);
#endif
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