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/* TABLIX, PGA general timetable solver */
/* Copyright (C) 2002-2005 Tomaz Solc */
/* This program 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 2 of the License, or */
/* (at your option) any later version. */
/* 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 */
/* GNU General Public License for more details. */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* $Id: fixedtime.c,v 1.4 2006-05-15 19:56:58 avian Exp $ */
/** @module
*
* @author Nick Robinson
* @author-email npr@bottlehall.co.uk
*
* @credits Extended by Tomaz Solc
*
* @brief Specifies that a particular event must be scheduled at the specified
* day and/or period.
*
* There is no fitness function, so the "weight" and "mandatory" module
* options are ignored (restrictions set by this module are always mandatory).
*
* Consider the following example:
*
* <event name="A" repeats="1">
* <restriction type="fixed-day">3</restriction>
* </event>
* <event name="B" repeats="1">
* <restriction type="fixed-day">2</restriction>
* </event>
* <event name="C" repeats="1">
* <restriction type="fixed-day">4</restriction>
* <restriction type="fixed-period">5</restriction>
* </event>
*
* Event "A" can be scheduled on any period of the fourth day of the week.
* Event "B" can be scheduled on the third period of any day of the week.
* Event "C" can only be scheduled on the sixth period of the fifth day.
*
* @ingroup School scheduling
*/
/** @tuple-restriction fixed-period
*
* <restriction type="fixed-period">period</restriction>
*
* This tuple restriction specifies that the time slots at the specified period
* should be used to schedule the lesson. "period" must be an integer between
* 0 and number of periods minus 1.
*
* It only makes sense to use one such restriction per event.
*/
/** @tuple-restriction fixed-day
*
* <restriction type="fixed-day">day</restriction>
*
* This tuple restriction specifies that the time slots at the specified day
* should be used to schedule the lesson. "day" must be an integer between 0
* and number of days minus 1.
*
* It only makes sense to use one such restriction per event.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include "module.h"
static int days;
static int periods;
int fixed_day(char *restriction, char *cont, tupleinfo *tuple)
{
int i,d;
int time_resid=restype_find("time")->typeid;
int *list;
i=sscanf(cont, "%d", &d);
if(i!=1||d<0||d>=days) {
error(_("Invalid fixed day"));
return(-1);
}
list=malloc(sizeof(*list)*periods);
if(list==NULL) {
error(_("Can't allocate memory"));
return(-1);
}
for(i=0;i<periods;i++) {
list[i]=d*periods+i;
}
domain_and(tuple->dom[time_resid], list, periods);
free(list);
return 0;
}
int fixed_period(char *restriction, char *cont, tupleinfo *tuple)
{
int i,p;
int time_resid=restype_find("time")->typeid;
int *list;
i=sscanf(cont, "%d", &p);
if(i!=1||p<0||p>=periods) {
error(_("Invalid fixed period"));
return(-1);
}
list=malloc(sizeof(*list)*days);
if(list==NULL) {
error(_("Can't allocate memory"));
return(-1);
}
for(i=0;i<days;i++) {
list[i]=i*periods+p;
}
domain_and(tuple->dom[time_resid], list, days);
free(list);
return 0;
}
int module_init(moduleoption *opt)
{
if(restype_find("time")==NULL) return -1;
if(res_get_matrix(restype_find("time"), &days, &periods)) {
error(_("Resource type 'time' is not a matrix"));
return -1;
}
handler_tup_new("fixed-period", fixed_period);
handler_tup_new("fixed-day", fixed_day);
return( 0 );
}
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