src/lib/commands/powe.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.
 *
 *  ---
 *
 *  powe.c: Do a power report
 * 
 *  Known contributors to this file:
 *     Dave Pare
 *     Ken Stevens, 1995
 *     Steve McClure, 1998-2000
 *     Markus Armbruster, 2006
 */

#include <config.h>
#include <unistd.h>
#include <math.h>

#include "commands.h"
#include "item.h"
#include "land.h"
#include "optlist.h"
#include "plane.h"
#include "power.h"
#include "ship.h"

static void prpower(char *, struct powstr *, int);
static void out5(double, int, int);
static void gen_power(struct powstr *, int);
static int powcmp(const void *, const void *);
static void addtopow(short *, struct powstr *);

int
powe(void)
{
    struct natstr *natp;
    int i;
    time_t pow_time;
    struct nstr_item ni;
    int save = 1;
    int num = MAXNOC;
    int power_generated = 0;
    struct natstr nat;
    struct powstr powbuf[MAXNOC];
    int targets[MAXNOC];
    int use_targets = 0;
    int no_numbers = 0;

    memset(targets, 0, sizeof(targets));

    i = 1;
    if (player->argp[1]) {
        switch (player->argp[1][0]) {
        case 'u':
            if (player->god)
                save = 0;
            /* fall through */
        case 'n':
            i++;
            natp = getnatp(player->cnum);
            if (natp->nat_btu < 1)
                pr("\n  Insufficient BTUs, using the last report.\n\n");
            else if (opt_AUTO_POWER && save)
                pr("\n  power new is disabled, using the last report.\n\n");
            else {
                gen_power(powbuf, save);
                pow_time = time(NULL);
                power_generated = 1;
            }
        }
    }

    if (player->argp[i]) {
        if (player->argp[i][0] == 'c') {
            snxtitem(&ni, EF_NATION, player->argp[i + 1]);
            while (nxtitem(&ni, &nat)) {
                if (nat.nat_stat != STAT_ACTIVE)
                    continue;
                targets[nat.nat_cnum] = 1;
            }
            use_targets = 1;
        } else
            num = atoi(player->argp[i]);
    }

    if (num < 0) {
        if (!player->god)
            return RET_SYN;
        num = -num;
        no_numbers = 1;
    }

    if (!power_generated) {
        pow_time = ef_mtime(EF_POWER);
        snxtitem_all(&ni, EF_POWER);
        if (!nxtitem(&ni, &powbuf[0])) {
            pr("Power for this game has not been built yet.%s\n",
               opt_AUTO_POWER ? "" : "  Type 'power new' to build it.");
            return RET_FAIL;
        }
        for (i = 1; i < MAXNOC; i++) {
            if (!nxtitem(&ni, &powbuf[i])) {
                CANT_REACH();
                memset(&powbuf[i], 0, sizeof(powbuf[i]));
            }
        }
    }

    pr("     - = [   Empire Power Report   ] = -\n");
    pr("      as of %s\n         sects  eff civ", ctime(&pow_time));
    pr("  mil  shell gun pet  iron dust oil  pln ship unit money\n");
    for (i = 1; i < MAXNOC && num > 0; i++) {
        if (opt_HIDDEN) {
            if (!player->god && powbuf[i].p_nation != player->cnum)
                continue;
        }
        if (use_targets && !targets[powbuf[i].p_nation])
            continue;
        if (!use_targets && powbuf[i].p_power <= 0.0)
            continue;
        prpower(cname(powbuf[i].p_nation), &powbuf[i],
                powbuf[i].p_nation != player->cnum && !player->god);
        if (player->god && !no_numbers)
            pr("%9.2f\n", powbuf[i].p_power);
        num--;
    }
    if (!opt_HIDDEN || player->god) {
        pr("          ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----\n");
        prpower("worldwide", &powbuf[0], !player->god);
        pr("\n");
    }
    return RET_OK;
}

static void
prpower(char *name, struct powstr *pow, int round_flag)
{
    pr("%9.9s", name);
    out5(pow->p_sects, 5, round_flag);
    if (pow->p_sects)
        pr("%4.0f%%", pow->p_effic / pow->p_sects);
    else
        pr("   0%%");
    out5(pow->p_civil, 50, round_flag);
    out5(pow->p_milit, 50, round_flag);
    out5(pow->p_shell, 25, round_flag);
    out5(pow->p_guns, 5, round_flag);
    out5(pow->p_petrol, 50, round_flag);
    out5(pow->p_iron, 50, round_flag);
    out5(pow->p_dust, 50, round_flag);
    out5(pow->p_oil, 50, round_flag);
    out5(pow->p_planes, 10, round_flag);
    out5(pow->p_ships, 10, round_flag);
    out5(pow->p_units, 10, round_flag);
    out5(pow->p_money, 5000, round_flag);
    pr("\n");
}

static void
out5(double value, int round_val, int round_flag)
{
    double aval;

    if (value > round_val && round_flag)
        value = (int)(value / round_val + 0.5) * round_val;
    aval = fabs(value);
    if (aval < 1000.)
        pr("%4.0f ", value);
    else if (aval < 9.95e3)
        pr("%4.1fK", value / 1e3);
    else if (aval < 999.5e3)
        pr("%4.0fK", value / 1e3);
    else if (aval < 9.95e6)
        pr("%4.1fM", value / 1e6);
    else if (aval < 999.5e6)
        pr("%4.0fM", value / 1e6);
    else
        pr("%4.0fG", value / 1e9);
}

void
update_power(void)
{
    struct powstr powbuf[MAXNOC];

    gen_power(powbuf, 1);
}

static void
gen_power(struct powstr *powbuf, int save)
{
    float *f_ptr;
    float *f_pt2;
    struct powstr *pow;
    int i;
    struct sctstr sect;
    struct plnstr plane;
    struct shpstr ship;
    struct lndstr land;
    struct nstr_item ni;
    struct nstr_sect ns;
    struct natstr *natp;
    float f;

    player->btused += 10;
    memset(powbuf, 0, MAXNOC * sizeof(*powbuf));
    snxtsct_all(&ns);
    while (nxtsct(&ns, &sect)) {
        if (sect.sct_own == 0)
            continue;
        pow = &powbuf[sect.sct_own];
        pow->p_sects += 1.0;
        pow->p_effic += sect.sct_effic;
        addtopow(sect.sct_item, pow);
    }
    snxtitem_all(&ni, EF_LAND);
    while (nxtitem(&ni, &land)) {
        if (land.lnd_own == 0)
            continue;
        pow = &powbuf[land.lnd_own];
        addtopow(land.lnd_item, pow);
        f = (lchr[(int)land.lnd_type].l_lcm / 10.0) * (land.lnd_effic / 100.0);
        f += (lchr[(int)land.lnd_type].l_hcm / 10.0) * (land.lnd_effic / 100.0);
        pow->p_power += f * 2;
        if (!(lchr[(int)land.lnd_type].l_flags & L_SPY))
            pow->p_units += 1.0;
    }
    snxtitem_all(&ni, EF_SHIP);
    while (nxtitem(&ni, &ship)) {
        if (ship.shp_own == 0)
            continue;
        pow = &powbuf[ship.shp_own];
        addtopow(ship.shp_item, pow);
        f = (mchr[(int)ship.shp_type].m_lcm / 10.0) * (ship.shp_effic / 100.0);
        f += (mchr[(int)ship.shp_type].m_hcm / 10.0) * (ship.shp_effic / 100.0);
        pow->p_power += f * 2;
        pow->p_ships += 1.0;
    }
    snxtitem_all(&ni, EF_PLANE);
    while (nxtitem(&ni, &plane)) {
        if (plane.pln_own == 0)
            continue;
        pow = &powbuf[plane.pln_own];
        pow->p_planes += 1.0;
        natp = getnatp(plane.pln_own);
        pow->p_power += 20 * (plane.pln_effic / 100.0) *
            (natp->nat_level[NAT_TLEV] / 500.0);
    }
    for (i = 1; NULL != (natp = getnatp(i)); i++) {
        pow = &powbuf[i];
        pow->p_nation = i;
        if (natp->nat_stat != STAT_ACTIVE) {
            pow->p_power = 0.;
            continue;
        }
        pow->p_money = natp->nat_money;
        pow->p_power += pow->p_money / 100.;

        pow->p_power += pow->p_petrol / 500.0;

        pow->p_power += (pow->p_civil + pow->p_milit) / 10.0;
        pow->p_power += pow->p_shell / 12.5;
        pow->p_power += pow->p_iron / 100.0;
        pow->p_power += pow->p_dust / 5 + pow->p_oil / 10 + pow->p_bars;
        pow->p_power += pow->p_guns / 2.5;
        if (pow->p_sects > 0)
            pow->p_power += pow->p_sects
                * (pow->p_effic / pow->p_sects / 100.0)
                * 10.0;
        pow->p_power *= MAX(1.0, natp->nat_level[NAT_TLEV]) / 500.0;
        /* ack.  add this vec to the "world power" element */
        f_pt2 = &powbuf[0].p_sects;
        f_ptr = &pow->p_sects;
        while (f_ptr <= &pow->p_power) {
            *f_pt2 += *f_ptr;
            f_pt2++;
            f_ptr++;
        }
    }
    for (i = 1; i < MAXNOC; i++) {
        struct natstr *np;
        int maxpop;

        if (opt_RES_POP) {
            np = getnatp(i);
            maxpop = max_population(np->nat_level[NAT_RLEV], SCT_MINE, 0);
            powbuf[i].p_power *= 1.0 + maxpop / 10000.0;
        }
    }
    qsort(&powbuf[1], MAXNOC - 1, sizeof(*powbuf), powcmp);
    if (!save)
        return;
    for (i = 0; i < MAXNOC; i++)
        putpower(i, &powbuf[i]);
#ifdef _WIN32
    /*
     * At least some versions of Windows fail to update mtime on
     * write(), they delay it until the write actually hits the disk.
     * Bad, because `power' displays that time.  Force it.
     */
    fsync(empfile[EF_POWER].fd);
#endif
}

static int
powcmp(const void *a, const void *b)
{
    const struct powstr *p1 = a;
    const struct powstr *p2 = b;

    if (p1->p_power > p2->p_power)
        return -1;
    if (p1->p_power < p2->p_power)
        return 1;
    return 0;
}

static void
addtopow(short *vec, struct powstr *pow)
{
    pow->p_civil += vec[I_CIVIL];
    pow->p_milit += vec[I_MILIT];
    pow->p_shell += vec[I_SHELL];
    pow->p_guns += vec[I_GUN];
    pow->p_petrol += vec[I_PETROL];
    pow->p_iron += vec[I_IRON];
    pow->p_dust += vec[I_DUST];
    pow->p_food += vec[I_FOOD];
    pow->p_oil += vec[I_OIL];
    pow->p_bars += vec[I_BAR];
    pow->p_power += vec[I_LCM] / 10.0;
    pow->p_power += vec[I_HCM] / 5.0;
}

---