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/* TABLIX, PGA highschool timetable generator */
/* Copyright (C) 2002-2007 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: firstlastequal.c,v 1.1 2007-05-27 17:58:40 avian Exp $ */
/** @module
*
* @author Tomaz Solc
* @author-email tomaz.solc@tablix.org
*
* @brief This module counts the number of occupied first and last time slots in
* teacher's (or any other constant resource type) timetables. The number of
* weights added is equal to the difference between the number of occupied
* first time slots and the number of occupied last time slots.
*
* For example if a teacher has two events scheduled on the first time slot in
* a day then it must also have two events scheduled on the last time slot.
* (E.g. A teacher teaches first period for Monday and Tuesday, and the last
* period for Wednesday, Tuesday, Friday. So that he/she can go home earlier
* on Monday/Tuesday and come in later on Wednesday, Tuesday, Friday.)
*
* The following example will make this module check teacher's timetable:
*
* <module name="firstlastequal" weight="60" mandatory="yes">
* <option name="resourcetype">teacher</option>
* </module>
*
* @ingroup School scheduling
*/
/** @option resourcetype
*
* Use this option to specify a constant resource type for which this module
* will be in effect.
*
* You can use multiple resourcetype options for one module.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include "module.h"
/* Dimensions of the time matrix */
static int periods, days;
int fitness(chromo **c, ext **e, slist **s)
{
int sum;
ext *timext;
int connum, con_resid;
int day;
/* number of non-free first and last time slots in a week */
int first_num, last_num;
int first_resid, last_resid;
timext=e[0];
connum=timext->connum;
sum=0;
for(con_resid=0;con_resid<connum;con_resid++) {
first_num=0;
last_num=0;
for(day=0;day<days;day++) {
/* resid of the first time slot of the day */
first_resid=day*periods;
/* resid of the last time slot */
last_resid=day*periods+periods-1;
if(timext->tupleid[first_resid][con_resid]!=-1) {
first_num++;
}
if(timext->tupleid[last_resid][con_resid]!=-1) {
last_num++;
}
}
sum=sum+abs(first_num-last_num);
}
return(sum);
}
int module_init(moduleoption *opt)
{
fitnessfunc *f;
moduleoption *result;
char *type;
char fitnessname[256];
int n;
resourcetype *time;
/* Find dimensions of the time matrix */
time=restype_find("time");
if(time==NULL) {
error(_("Resource type '%s' not found"), "time");
return -1;
}
n=res_get_matrix(time, &days, &periods);
if(n) {
error(_("Resource type %s is not a matrix"), "time");
return -1;
}
/* Register fitness functions */
result=option_find(opt, "resourcetype");
if(result==NULL) {
error(_("module '%s' has been loaded, but not used"),
"firstlastequal.so");
}
while(result!=NULL) {
type=result->content_s;
snprintf(fitnessname, 256, "firstlastequal-%s", type);
f=fitness_new(fitnessname,
option_int(opt, "weight"),
option_int(opt, "mandatory"),
fitness);
if(f==NULL) return -1;
n=fitness_request_ext(f, type, "time");
if(n) return -1;
result=option_find(result->next, "resourcetype");
}
return(0);
}
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