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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: perday.c,v 1.4 2006-08-29 14:32:24 avian Exp $ */
/** @module
*
* @author Tomaz Solc
* @author-email tomaz.solc@tablix.org
*
* @brief This module calculates weekly dispersion of non-free time slots for
* different resources (usually classes and teachers). Number of added weights
* is equal to the sum of dispersions for all classes.
*
* This module tries to ensure that students have their work evenly
* distributed throughout the week. For example: This module would add zero
* weights if a class has 5 non-free periods on each day of the week. On the
* other hand, it would add 2 weights if this class has 6 non-free periods on
* monday, 4 on tuesday and 5 on wednesday, thursday and friday. This is done
* by calculating mathematical dispersion of non-free periods through the
* weekdays.
*
* @ingroup School scheduling
*/
/** @option resourcetype
*
* Use this option to specify one or more constant resource types. Specified
* resource types will have their timetables checked by this module.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include "module.h"
static int periods, days;
static int **perday;
static int calculate_perday(resourcetype *restype) {
int resid;
int tupleid;
int typeid;
int sum;
typeid=restype->typeid;
perday[typeid]=malloc(sizeof(*perday[typeid])*restype->resnum);
if(perday[typeid]==NULL) return -1;
for(resid=0;resid<restype->resnum;resid++) {
sum=0;
for(tupleid=0;tupleid<dat_tuplenum;tupleid++) {
if(dat_tuplemap[tupleid].resid[typeid]==resid) sum++;
}
perday[typeid][resid]=sum/days;
}
return 0;
}
int fitness(chromo **c, ext **e, slist **s)
{
int sum;
int subsum;
int tupleid;
int conid;
int nonfree;
ext *timext;
int connum, con_resid;
int day, period, var_resid;
int *perdays;
timext=e[0];
connum=timext->connum;
conid=timext->con_typeid;
perdays=perday[conid];
sum=0;
for(con_resid=0;con_resid<connum;con_resid++) {
var_resid=0;
for(day=0;day<days;day++) {
nonfree=0;
for(period=0;period<periods;period++) {
tupleid=timext->tupleid[var_resid][con_resid];
if(tupleid!=-1) nonfree++;
var_resid++;
}
subsum=nonfree-perdays[con_resid];
if(subsum!=0&&subsum!=1) sum=sum+subsum*subsum;
}
}
return(sum);
}
int module_init(moduleoption *opt)
{
fitnessfunc *f;
moduleoption *result;
char *type;
char fitnessname[256];
int n;
resourcetype *time;
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;
}
perday=malloc(sizeof(*perday)*dat_typenum);
if(perday==NULL) {
error(_("Can't allocate memory"));
return -1;
}
result=option_find(opt, "resourcetype");
if(result==NULL) {
error(_("module '%s' has been loaded, but not used"), "perday.so");
}
while(result!=NULL) {
type=result->content_s;
snprintf(fitnessname, 256, "perday-%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;
if(calculate_perday(restype_find(type))) {
error(_("Can't allocate memory"));
return -1;
}
result=option_find(result->next, "resourcetype");
}
return(0);
}
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