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/*
* $Id: $
* $Version: $
*
* Copyright (c) Tanel Tammet 2004,2005,2006,2007,2008,2009,2010
*
* Contact: tanel.tammet@gmail.com
*
* This file is part of WhiteDB
*
* WhiteDB 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 3 of the License, or
* (at your option) any later version.
*
* WhiteDB 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 WhiteDB. If not, see <http://www.gnu.org/licenses/>.
*
*/
/** @file clterm.c
* Procedures for building clauses/terms and fetching parts.
*
*/
/* ====== Includes =============== */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
#include "rincludes.h"
/* ====== Private headers and defs ======== */
/* ======= Private protos ================ */
/* ====== Functions ============== */
/* ---------------- wr functions --------------------- */
gptr wr_create_raw_record(glb* g, gint length, gint meta, gptr buffer) {
gptr rec;
if (buffer==NULL) {
rec=wg_create_raw_record(g->db,length);
if (rec==NULL) return NULL;
rec[RECORD_META_POS]=meta;
} else {
rec=wr_alloc_from_cvec(g,buffer,length+RECORD_HEADER_GINTS);
if (rec==NULL) return NULL;
rec[0]=(length+RECORD_HEADER_GINTS)*sizeof(gint);
rec[RECORD_BACKLINKS_POS]=0;
rec[RECORD_META_POS]=meta;
//printf("wr_create_raw_record created: \n");
//wg_print_record(g->db,rec);
}
return rec;
}
/* ---------------- wg functions --------------------- */
void* wr_create_rule_clause(glb* g, int litnr) {
void* res;
res=wg_create_raw_record(g->db,CLAUSE_EXTRAHEADERLEN+(LIT_WIDTH*litnr));
//printf("meta %d",*((gint*)res+RECORD_META_POS));
*((gint*)res+RECORD_META_POS)=(RECORD_META_NOTDATA | RECORD_META_RULE_CLAUSE);
return res;
}
void* wr_create_fact_clause(glb* g, int litnr) {
void* res;
res=wg_create_raw_record(g->db,(g->unify_firstuseterm)+litnr+(g->unify_footerlen));
*((gint*)res+RECORD_META_POS)=RECORD_META_FACT_CLAUSE;
return res;
}
void* wr_create_atom(glb* g, int termnr) {
void* res;
res=wg_create_raw_record(g->db,(g->unify_firstuseterm)+termnr+(g->unify_footerlen));
*((gint*)res+RECORD_META_POS)=(RECORD_META_NOTDATA | RECORD_META_ATOM);
return res;
}
void* wr_create_term(glb* g, int termnr) {
void* res;
res=wg_create_raw_record(g->db,(g->unify_firstuseterm)+termnr+(g->unify_footerlen));
*((gint*)res+RECORD_META_POS)=(RECORD_META_NOTDATA | RECORD_META_TERM);
return res;
}
void* wr_convert_atom_fact_clause(glb* g, void* atom, int isneg) {
void* res;
res=atom;
*((gint*)res+RECORD_META_POS)=(RECORD_META_ATOM | RECORD_META_FACT_CLAUSE);
return res;
}
int wr_set_rule_clause_atom(glb* g, void* clause, int litnr, gint atom) {
//wg_set_new_field(db,clause,CLAUSE_EXTRAHEADERLEN+(LIT_WIDTH*litnr)+1,atom);
*((gint*)clause+RECORD_HEADER_GINTS+CLAUSE_EXTRAHEADERLEN+(LIT_WIDTH*litnr)+1)=atom;
return 0;
}
int wr_set_rule_clause_atom_meta(glb* g, void* clause, int litnr, gint meta) {
//wg_set_new_field(db,clause,CLAUSE_EXTRAHEADERLEN+(LIT_WIDTH*litnr),meta);
*((gint*)clause+RECORD_HEADER_GINTS+CLAUSE_EXTRAHEADERLEN+(LIT_WIDTH*litnr))=meta;
return 0;
}
int wr_set_atom_subterm(glb* g, void* atom, int termnr, gint subterm) {
wg_set_new_field(g->db,atom,(g->unify_firstuseterm)+termnr,subterm);
return 0;
}
int wr_set_term_subterm(glb* g, void* term, int termnr, gint subterm) {
wg_set_new_field(g->db,term,(g->unify_firstuseterm)+termnr,subterm);
return 0;
}
#ifdef __cplusplus
}
#endif
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