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/* TABLIX, PGA general timetable solver */
/* Copyright (C) 2002 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: preferredtime.c,v 1.3 2006-08-29 14:32:24 avian Exp $ */
/** @module
*
* @author Tomaz Solc
* @author-email tomaz.solc@tablix.org
*
* @credits
* Ideas taken from a patch for Tablix 0.0.3 by
* Jaume Obrador <obrador@espaiweb.net>
*
* Ported to version 0.2.0 and extended by Nick Robinson <npr@bottlehall.co.uk>
*
* @brief Adds a weight whenever an event is not scheduled at the specified
* preferred day and/or time slot.
*
* @ingroup General
*/
/** @tuple-restriction preferred-period
*
* <restriction type="preferred-period">period</restriction>
*
* This restriction specifies the preferred period for an event.
*/
/** @tuple-restriction preferred-day
*
* <restriction type="preferred-day">day</restriction>
*
* This restriction specifies the preferred day for an event.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "module.h"
static int *pperiod;
static int *pday;
static int days;
static int periods;
int checkprev(int tupleid)
{
int tupleid1, tupleid2;
int n;
int same=0;
int samename;
if(tupleid<=0) return 0;
tupleid1=tupleid;
tupleid2=tupleid-1;
samename=!strcmp(dat_tuplemap[tupleid1].name,
dat_tuplemap[tupleid2].name);
if(samename) {
/* There is a tuple named exactly like this before this one */
/* Check if it uses the same constant resources */
same=1;
for(n=0;n<dat_typenum;n++) if(!dat_restype[n].var) {
if(dat_tuplemap[tupleid1].resid[n]!=dat_tuplemap[tupleid2].resid[n])
{
same=0;
break;
}
}
}
return same;
}
int getday(char *restriction, char *cont, tupleinfo *tuple)
{
int p,c;
c=sscanf(cont, "%d", &p);
if(c<1||p<0||p>=days) {
error(_("invalid preferred day"));
return(1);
}
pday[tuple->tupleid]=p;
return 0;
}
int getperiod(char *restriction, char *cont, tupleinfo *tuple)
{
int p,c;
c=sscanf(cont, "%d", &p);
if(c<1||p<0||p>=periods) {
error(_("invalid preferred period"));
return(1);
}
pperiod[tuple->tupleid]=p;
return 0;
}
int module_fitness(chromo **c, ext **e, slist **s)
{
int sum;
int tupleid, resid;
int period, day;
chromo *time;
time=c[0];
sum=0;
for(tupleid=0;tupleid<time->gennum;tupleid++)
{
resid=time->gen[tupleid];
day=resid/periods;
period=resid%periods;
if(pday[tupleid]>-1 && day!=pday[tupleid]) sum++;
if(pperiod[tupleid]>-1 && period!=pperiod[tupleid]) sum++;
}
return(sum);
}
int module_precalc(moduleoption *opt)
{
int c;
for(c=0;c<dat_tuplenum && pperiod[c]==-1 && pday[c]==-1;c++);
if(c==dat_tuplenum) {
error(_("module '%s' has been loaded, but not used"), "preferred.so");
return( 0 );
}
for(c=dat_tuplenum-1;c>0;c--) {
if(checkprev(c)) {
if(pperiod[c]!=-1 && pday[c]!=-1 ) {
info(_("restriction 'preferred-period' and 'preferred-day' only set on first instance of an event where 'repeats' > 1"));
while (c>0 && checkprev(c)) {
pperiod[c] = pday[c] = -1;
c--;
}
} else if(pday[c]!=-1) {
info(_("restriction 'preferred-day' only set on first instance of an event where 'repeats' > 1"));
while (c>0 && checkprev(c)) {
pperiod[c] = pday[c] = -1;
c--;
}
} else if(pperiod[c]!=-1) {
debug(_("using only restriction 'preferred-period' where 'repeats' > 1 will cause problems with 'consecutive' restrictions"));
}
}
}
return 0;
}
int module_init(moduleoption *opt)
{
int c;
resourcetype *time;
fitnessfunc *fitness;
pperiod=malloc(sizeof(*pperiod)*dat_tuplenum);
pday=malloc(sizeof(*pday)*dat_tuplenum);
if(pperiod==NULL||pday==NULL) {
error(_("Can't allocate memory"));
return -1;
}
time=restype_find("time");
if(time==NULL) return -1;
c=res_get_matrix(restype_find("time"), &days, &periods);
if(c) {
error(_("Resource type 'time' is not a matrix"));
return -1;
}
for(c=0;c<dat_tuplenum;c++) {
pperiod[c]=-1;
pday[c]=-1;
}
handler_tup_new("preferred-day", getday);
handler_tup_new("preferred-period", getperiod);
precalc_new( module_precalc );
fitness=fitness_new("preferred subject",
option_int(opt, "weight"),
option_int(opt, "mandatory"),
module_fitness);
if(fitness==NULL) return -1;
if(fitness_request_chromo(fitness, "time")) return -1;
return 0;
}
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