src/lib/common/nat.c

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/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
 *                           Ken Stevens, Steve McClure
 *
 *  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
 *
 *  ---
 *
 *  See files README, COPYING and CREDITS in the root of the source
 *  tree for related information and legal notices.  It is expected
 *  that future projects/authors will amend these files as needed.
 *
 *  ---
 *
 *  nat.c: Misc. accesses on the nation file
 * 
 *  Known contributors to this file:
 *     Dave Pare, 1989
 */

#include <config.h>

#include "file.h"
#include "misc.h"
#include "nat.h"
#include "sect.h"

char *relates[] = {
    /* must follow nation relation defines in nat.h */
    "At War", "Sitzkrieg", "Mobilizing", "Hostile", "Neutral", "Friendly",
    "Allied"
};

char *
cname(natid n)
{
    struct natstr *np;

    if ((np = getnatp(n)) == 0)
        return 0;
    return np->nat_cnam;
}

char *
relatename(struct natstr *np, natid other)
{
    return relates[getrel(np, other)];
}

char *
rejectname(struct natstr *np, natid other)
{
    static char *rejects[] = {
        /* must follow reject flags defined in nat.h */
        "  YES  YES  YES  YES",
        "  NO   YES  YES  YES",
        "  YES  NO   YES  YES",
        "  NO   NO   YES  YES",
        "  YES  YES  NO   YES",
        "  NO   YES  NO   YES",
        "  YES  NO   NO   YES",
        "  NO   NO   NO   YES",
        "  YES  YES  YES  NO ",
        "  NO   YES  YES  NO ",
        "  YES  NO   YES  NO ",
        "  NO   NO   YES  NO ",
        "  YES  YES  NO   NO ",
        "  NO   YES  NO   NO ",
        "  YES  NO   NO   NO ",
        "  NO   NO   NO   NO "
    };

    return rejects[getrejects(other, np)];
}

char *
natstate(struct natstr *np)
{
    static char *stnam[] = {
        /* must match nat_status */
        "FREE", "VISITOR", "VISITOR", "SANCTUARY", "ACTIVE", "DEITY"
    };
    return stnam[np->nat_stat];
}

/* This returns the relations that np has with them */
int
getrel(struct natstr *np, natid them)
{
    return np->nat_relate[them];
}

int
getrejects(natid them, struct natstr *np)
{
    return np->nat_rejects[them];
}

void
agecontact(struct natstr *np)
{
    int them;

    for (them = 1; them < MAXNOC; ++them) {
        if (them != np->nat_cnum && np->nat_contact[them]) {
            --np->nat_contact[them];
        }
    }
}

int
getcontact(struct natstr *np, natid them)
{
    return np->nat_contact[them];
}

void
putrel(struct natstr *np, natid them, int relate)
{
    np->nat_relate[them] = relate;
}

void
putreject(struct natstr *np, natid them, int how, int what)
{
    if (how)
        np->nat_rejects[them] |= what;
    else
        np->nat_rejects[them] &= what;
}

void
putcontact(struct natstr *np, natid them, int contact)
{
    if (CANT_HAPPEN(contact < 0))
        contact = 0;
    if (CANT_HAPPEN(contact > 255))
        contact = 255;

    if (np->nat_contact[them] < contact)
        np->nat_contact[them] = contact;
}

int
influx(struct natstr *np)
{
    struct sctstr sect;

    getsect(np->nat_xcap, np->nat_ycap, &sect);
    if (sect.sct_own != np->nat_cnum ||
        (sect.sct_type != SCT_CAPIT && sect.sct_type != SCT_MOUNT &&
         sect.sct_type != SCT_SANCT) ||
        (np->nat_flags & NF_SACKED))
        return 1;
    else
        return 0;
}

---