src/lib/update/revolt.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.
 *
 *  ---
 *
 *  revolt.c: Have disloyal populace revolt!
 * 
 *  Known contributors to this file:
 *     Dave Pare, 1986
 *     Steve McClure, 1997-2000
 */

#include <config.h>

#include "land.h"
#include "lost.h"
#include "news.h"
#include "nsc.h"
#include "path.h"
#include "plane.h"
#include "update.h"

static void take_casualties(struct sctstr *, int);

void
revolt(struct sctstr *sp)
{
    int che_civ;
    int che_uw;
    int civ;
    int uw;
    int che;
    int n;

    che = sp->sct_che;
    if (che != 0 && (sp->sct_che_target != sp->sct_own || che >= CHE_MAX))
        return;
    civ = sp->sct_item[I_CIVIL];
    uw = sp->sct_item[I_UW];
    if (che > (civ + uw) * 3)
        return;
    che_uw = 0;
    che_civ = 0;
    /* che due to civilian unrest */
    n = 10 - (random() % 20);
    che_civ = 3 + (civ * n / 500);
    if (che_civ < 0)
        che_civ = 0;
    else if (che_civ * 3 > civ)
        che_civ = civ / 3;
    if (che + che_civ > CHE_MAX)
        che_civ = CHE_MAX - che;
    che += che_civ;
    if (che < CHE_MAX) {
        /* che due to uw unrest */
        n = 10 + (random() % 30);
        che_uw = 5 + (uw * n / 500);
        if (che_uw > uw)
            che_uw = uw;
        if (che + che_uw > CHE_MAX)
            che_uw = CHE_MAX - che_uw;
        che += che_uw;
    }
    if (che_civ + che_uw > 0) {
        civ -= che_civ;
        uw -= che_uw;
        sp->sct_che_target = sp->sct_own;
        sp->sct_che = che;
        if (che_civ > 0)
            sp->sct_item[I_CIVIL] = civ;
        if (che_uw > 0)
            sp->sct_item[I_UW] = uw;
#ifdef DEBUG
        logerror("(#%d) %d che fired up in %s",
                 sp->sct_own, che, ownxy(sp));
#endif
    }
}

/*
 * summary of effects.
 * if there are no military in the sector, che recruit from
 *   populace if pop loyalty is > 10.  They spread subversion otherwise,
 *   trying to lower pop loyalty.
 * if che outnumber military, they stay and shoot it out, kill the
 *   military.
 * if che are outnumbered by less than 5 to 1, they blow up stuff,
 *   killing innocent civilians (never uw's) and damaging commodities.
 * if che are outnumbered by more than 5 to 1, they try to leave the
 *   sector for a nearby sector with fewer military.
 *
 * if the military lose any attacks, the pop loyalty in the sector
 *   gets worse, representing military defeat.
 * military can "catch" che's after bombing attacks, or after they move.
 *   If military catch them, then they get to shoot it out with a portion
 *   of the che's depending on the # of mil in the sector.  Chance to contact
 *   is around 10% per every equal number of mil:che ratio in the sector.
 *   "contact" is by 20% of the military in the sector, and odds are equal.
 *
 * Without a doubt this routine should be broken up, if only for readabilty.
 */
void
guerrilla(struct sctstr *sp)
{
    struct sctstr *nsp;
    int recruit;
    int move;
    int ratio;
    int che;
    int mil;
    int cc, mc;
    double odds;
    int civ;
    int n;
    int uw;
    natid target;
    struct natstr *tnat;
    int convert;
    natid actor;
    natid victim;
    int tmp;
    int min_mil;
    int val;
    int oldmob;
    struct lndstr *lp;
    struct nstr_item ni;

    mc = cc = 0;
    recruit = 0;
    convert = 0;
    move = 0;
    if (!sp->sct_che)
        return;
    civ = sp->sct_item[I_CIVIL];
    uw = sp->sct_item[I_UW];
    victim = sp->sct_own;
    actor = sp->sct_oldown;
    che = sp->sct_che;
    mil = sp->sct_item[I_MILIT];

    snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);

    while (NULL != (lp = nxtitemp(&ni))) {
        if (lp->lnd_own != sp->sct_own)
            continue;

        mil += lp->lnd_item[I_MILIT];

        if (sp->sct_che_target != sp->sct_own)
            continue;

        /* Security troops can now kill up to 1/5 their complement each
           update, before doing anything else. */
        if (lchr[(int)lp->lnd_type].l_flags & L_SECURITY) {
            int che_kill, r;

            mil += lp->lnd_item[I_MILIT];
            r = (lp->lnd_item[I_MILIT] * lp->lnd_effic) / 500;
            che_kill = r < 1 ? 0 : roll(r);
            if (che_kill > che)
                che_kill = che;
            if (che_kill) {
                wu(0, sp->sct_own,
                   "%s kills %d guerrilla%s in raid at %s!\n",
                   prland(lp), che_kill, splur(che_kill), ownxy(sp));
                che -= che_kill;
            }
        }
    }

    /* Security forces killed all the che */
    if (che <= 0) {
        sp->sct_che = 0;
        sp->sct_che_target = 0;
        return;
    }

    target = sp->sct_che_target;
    if (CANT_HAPPEN(target == 0))
        return;
    tnat = getnatp(target);
    if (tnat->nat_stat == STAT_UNUSED) {
        /* target nation has dissolved: che's retire.  */
        logerror("%d Che targeted at country %d retiring", che, target);
        sp->sct_che = 0;
        sp->sct_che_target = 0;
        sp->sct_item[I_CIVIL] = MIN(civ + che, ITEM_MAX);
        return;
    }

    if (sp->sct_own != target) {
        /*logerror("own %d != target %d", sp->sct_own, target); */
        move++;
        goto domove;
    }

    ratio = mil / che;
    odds = (double)che / (mil + che);
    odds /= hap_fact(tnat, getnatp(sp->sct_oldown));
    if (mil == 0) {
        wu(0, sp->sct_own, "Revolutionary subversion reported in %s!\n",
           ownxy(sp));
        recruit++;
        convert++;
    } else if (che > mil && mil > 0) {
        /*logerror("guerrilla shootout with military"); */
        /*
         * shoot it out with the military, and kill them off.
         * If loyalty bad enough, then take the sector over,
         * and enlist 5% of civ as military force.
         */
        while (che > 0 && mil > 0) {
            if (chance(odds)) {
                mc++;
                mil--;
            } else {
                cc++;
                che--;
            }
        }
        if (mil > 0) {
            /* military won.  */
            n = sp->sct_loyal - (random() % 15);
            if (n < 0)
                n = 0;
            sp->sct_loyal = n;
            /*logerror("(#%d) mil beat che in %s", sp->sct_own, */
            /*ownxy(sp)); */
        } else {
            convert++;
            recruit++;
            /*logerror("(#%d) che beat mil in %s", sp->sct_own, */
            /*ownxy(sp)); */
        }
        take_casualties(sp, mc);
    } else if (ratio < 5) {
        /*
         * guerrillas have to resort to blowing things up.
         * Note this disrupts work in the sector.
         */
        n = 0;
        n = (random() % 10) + (random() % che);
        if (n > 100)
            n = 100;
        tmp = sp->sct_work - n;
        if (tmp < 0)
            tmp = 0;
        sp->sct_work = tmp;
        wu(0, sp->sct_own,
           "Production %s disrupted by terrorists in %s\n",
           effadv(n), ownxy(sp));
        sect_damage(sp, n / 10, 0);
        /*logerror("(#%d) che blew up %s for %d", sp->sct_own, */
        /*ownxy(sp), n); */
        recruit++;
    } else {
        /* ratio >= 5 */
        /*logerror("(#%d) %d che fleeing %d mil in %s", sp->sct_own, */
        /*che, mil, ownxy(sp)); */
        move++;
    }
    if (mil > 0 && che > 0) {
        /*
         * we only get here if we haven't had combat previously.
         * Chance to catch them.
         * 20% of mil involved in attacking the che's.
         */
        if (chance(ratio * 0.10)) {
            n = (mil / 5) + 1;
            odds = (double)che / (n + che);
            odds /= hap_fact(tnat, getnatp(sp->sct_oldown));
            while (che > 0 && n > 0) {
                if (chance(odds)) {
                    mc++;
                    n--;
                } else {
                    cc++;
                    che--;
                }
            }
            take_casualties(sp, mc);
            recruit = 0;
            /*logerror("Caught che; mc: %d, cc: %d", cc, mc); */
        }
    }
    if (convert && sp->sct_loyal >= 50) {
        int n;
        /* new owner gets to keep the mobility there */
        oldmob = sp->sct_mobil;
        /* che won, and sector converts. */
        if (sp->sct_own == sp->sct_oldown)
            sp->sct_oldown = 0;
        else
            takeover(sp, sp->sct_oldown);
        sp->sct_mobil = oldmob;
        civ += uw;
        uw = 0;
        n = civ / 20;
        civ -= n;
        if (civ > ITEM_MAX) {
            uw = civ - ITEM_MAX;
            civ = ITEM_MAX;
        }
        sp->sct_item[I_CIVIL] = civ;
        sp->sct_item[I_UW] = uw;
        sp->sct_item[I_MILIT] = n;
        move++;
        recruit = 0;
        if (sp->sct_own)
            wu(0, sp->sct_own, "Sector %s has been retaken!\n",
               xyas(sp->sct_x, sp->sct_y, sp->sct_own));
    }
    if (recruit && che > 0) {
        /* loyalty drops during recruitment efforts */
        n = sp->sct_loyal;
        if (n < 30)
            n += (random() % 5) + 1;
        else if (n < 70)
            n += (random() % 10) + 4;
        if (n > 127)
            n = 127;
        sp->sct_loyal = n;
        if (sp->sct_oldown != sp->sct_own || n > 100) {
            n = civ * (random() % 3) / 200;
            n /= hap_fact(tnat, getnatp(sp->sct_oldown));
            if (n + che > CHE_MAX)
                n = CHE_MAX - che;
            che += n;
            civ -= n;
            sp->sct_item[I_CIVIL] = civ;
        }
        n = uw * (random() % 3) / 200;
        if (n + che > CHE_MAX)
            n = CHE_MAX - che;
        che += n;
        uw -= n;
        sp->sct_item[I_UW] = uw;
    }
  domove:
    if (move && che > 0) {
        struct sctstr *nicest_sp = 0;
        if (convert)
            min_mil = 999;
        else
            min_mil = mil;
        /* search adjacent sectors for a nice one */
        for (n = 1; n <= 6; n++) {
            nsp = getsectp(sp->sct_x + diroff[n][0],
                           sp->sct_y + diroff[n][1]);
            if (dchr[nsp->sct_type].d_mob0 < 0)
                continue;
            if (nsp->sct_own != target)
                continue;
            if (nsp->sct_che > 0) {
                if (nsp->sct_che_target != target)
                    continue;
                if (nsp->sct_che + che > CHE_MAX)
                    continue;
            }
            val = nsp->sct_item[I_MILIT];
            /* don't give che more precise info than spy */
            val = roundintby(val, 10);
            /* inject a modicum of indeterminism; also
             * avoids che preferring certain directions */
            val += random() % 10 - 5;
            if (val >= min_mil)
                continue;
            nicest_sp = nsp;
            min_mil = val;
        }
        /* if we found a nice sector, go there */
        if (nicest_sp != 0) {
            nicest_sp->sct_che += che;
            nicest_sp->sct_che_target = target;
            che = 0;
        }
    }
    if (che > 0) {
        sp->sct_che = che;
        sp->sct_che_target = target;
    } else {
        sp->sct_che = 0;
        sp->sct_che_target = 0;
    }
    if (mc > 0 || cc > 0) {
        wu(0, target,
           "Guerrilla warfare in %s\n",
           xyas(sp->sct_x, sp->sct_y, target));
        if (sp->sct_own == target)
            wu(0, target, "  body count: troops: %d, rebels: %d\n", mc, cc);
        else
            wu(0, target,
               "  rebels murder %d military\n", mc);
        nreport(actor, N_FREEDOM_FIGHT, victim, 1);
    }
    if (sp->sct_own != victim)
        wu(0, victim, "Partisans take over %s!\n",
           xyas(sp->sct_x, sp->sct_y, victim));
}

static void
take_casualties(struct sctstr *sp, int mc)
{
    int orig_mil;
    int cantake;
    int nunits = 0, each, deq;
    struct lndstr *lp;
    struct nstr_item ni;

    /* casualties come out of mil first */
    orig_mil = sp->sct_item[I_MILIT];

    if (mc <= orig_mil) {
        sp->sct_item[I_MILIT] = orig_mil - mc;
        return;
    }
    sp->sct_item[I_MILIT] = 0;

    /* remaining casualites */
    mc -= orig_mil;

    /*
     * Need to take total_casualties and divide
     * them amongst the land units in the sector
     * Do security troops first, then others.
     * Try not to kill any unit.
     */
    snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
    while (NULL != (lp = nxtitemp(&ni))) {
        nunits++;
        if (lchr[(int)lp->lnd_type].l_flags & L_SECURITY)
            nunits++;
    }

    if (nunits == 0)
        return;

    each = (mc / nunits) + 2;

    /* kill some security troops */
    snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
    while (NULL != (lp = nxtitemp(&ni))) {
        if (!(lchr[(int)lp->lnd_type].l_flags & L_SECURITY))
            continue;

        cantake = ((lp->lnd_effic - 40) / 100.0) * lp->lnd_item[I_MILIT];

        if (cantake >= each) {
            deq = ((double)each / lp->lnd_item[I_MILIT]) * 100.0;
            mc -= 2 * each;
        } else if (cantake > 0) {
            deq = ((double)cantake / lp->lnd_item[I_MILIT]) * 100.0;
            mc -= 2 * cantake;
        } else
            deq = 0;

        lp->lnd_effic -= deq;
        lp->lnd_mobil -= deq / 2;
        deq = lchr[(int)lp->lnd_type].l_mil * (deq / 100.0);
        lnd_submil(lp, deq);
        if (mc <= 0)
            return;
    }

    /* kill some normal troops */
    snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
    while (NULL != (lp = nxtitemp(&ni))) {
        if (lchr[(int)lp->lnd_type].l_flags & L_SECURITY)
            continue;

        cantake = ((lp->lnd_effic - 40) / 100.0) * lp->lnd_item[I_MILIT];

        if (cantake >= each) {
            deq = ((double)each / lp->lnd_item[I_MILIT]) * 100.0;
            mc -= each;
        } else if (cantake > 0) {
            deq = ((double)cantake / lp->lnd_item[I_MILIT]) * 100.0;
            mc -= cantake;
        } else
            deq = 0;

        lp->lnd_effic -= deq;
        lp->lnd_mobil -= deq / 2;
        deq = lchr[(int)lp->lnd_type].l_mil * (deq / 100.0);
        lnd_submil(lp, deq);
        if (mc <= 0)
            return;
    }

    /* Hmm.. still some left.. kill off units now */
    /* kill some normal troops */
    snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
    while (NULL != (lp = nxtitemp(&ni))) {
        if (lchr[(int)lp->lnd_type].l_flags & L_SECURITY)
            continue;

        mc -= (lp->lnd_effic / 100.0) * lp->lnd_item[I_MILIT];
        lp->lnd_effic = 0;
        lnd_submil(lp, 1000);   /* Remove 'em all */
        wu(0, lp->lnd_own, "%s dies fighting guerrillas in %s\n",
           prland(lp), xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
        makelost(EF_LAND, lp->lnd_own, lp->lnd_uid, lp->lnd_x, lp->lnd_y);
        lp->lnd_own = 0;
        if (mc <= 0)
            return;
    }

    /* Hmm.. still some left.. kill off units now */
    /* kill some security troops */
    snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
    while (NULL != (lp = nxtitemp(&ni))) {
        if (!(lchr[(int)lp->lnd_type].l_flags & L_SECURITY))
            continue;

        mc -= (lp->lnd_effic / 100.0) * lp->lnd_item[I_MILIT] * 2.0;
        lp->lnd_effic = 0;
        lnd_submil(lp, 1000);   /* Kill 'em all */
        wu(0, lp->lnd_own, "%s dies fighting guerrillas in %s\n",
           prland(lp), xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
        makelost(EF_LAND, lp->lnd_own, lp->lnd_uid, lp->lnd_x, lp->lnd_y);
        lp->lnd_own = 0;
        if (mc <= 0)
            return;
    }

    /* Hmm.. everyone dead.. too bad */
}

---