58 lines
2 KiB
C
58 lines
2 KiB
C
/*
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* A* Search - A search library used in Empire to determine paths between
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* objects.
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* Copyright (C) 1990-1998 Phil Lapsley
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "as.h"
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/*
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* Return an as_data structure with the necessary fields filled in
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* and space malloced. Return NULL if malloc fails.
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*/
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struct as_data *
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as_init(int maxneighbors,
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int hashsize,
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int (*hashfunc) (struct as_coord),
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int (*neighborfunc) (struct as_coord, struct as_coord *, s_char *),
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double (*lbcostfunc) (struct as_coord, struct as_coord, s_char *),
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double (*realcostfunc) (struct as_coord, struct as_coord,
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s_char *),
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double (*seccostfunc) (struct as_coord, struct as_coord, s_char *),
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s_char *userdata)
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{
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struct as_data *adp;
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AS_NEW(adp, struct as_data, NULL);
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AS_NEW_ARRAY(adp->neighbor_coords, struct as_coord,
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maxneighbors, NULL);
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AS_NEW_ARRAY(adp->neighbor_nodes, struct as_node *,
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maxneighbors + 1, NULL);
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AS_NEW_ARRAY(adp->hashtab, struct as_hash *, hashsize, NULL);
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adp->maxneighbors = maxneighbors;
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adp->hashsize = hashsize;
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adp->hash = hashfunc;
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adp->neighbor = neighborfunc;
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adp->lbcost = lbcostfunc;
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adp->realcost = realcostfunc;
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adp->seccost = seccostfunc;
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adp->userdata = userdata;
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return adp;
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}
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