Import of Empire 4.2.12
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src/lib/commands/mine.c
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175
src/lib/commands/mine.c
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/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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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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* ---
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*
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* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
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* related information and legal notices. It is expected that any future
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* projects/authors will amend these files as needed.
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*
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* ---
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*
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* mine.c: Lay mines from ships or units
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*
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* Known contributors to this file:
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*
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*/
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#include "misc.h"
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#include "player.h"
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#include "var.h"
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#include "ship.h"
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#include "land.h"
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#include "sect.h"
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#include "nat.h"
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#include "xy.h"
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#include "nsc.h"
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#include "file.h"
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#include "commands.h"
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/*
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* format: mine <SHIPS> <NUMBER MINES>
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*/
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int
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mine(void)
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{
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struct shpstr ship;
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struct sctstr sect;
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struct mchrstr *mp;
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struct nstr_item ni;
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int mines;
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int shells;
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int mines_avail;
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int mines_there;
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if (!snxtitem(&ni, EF_SHIP, player->argp[1]))
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return RET_SYN;
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mines = onearg(player->argp[2], "Drop how many mines from each ship? ");
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if (mines <= 0)
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return RET_SYN;
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while (nxtitem(&ni, (s_char *)&ship)) {
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if (!player->owner)
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continue;
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mp = &mchr[(int)ship.shp_type];
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if ((mp->m_flags & M_MINE) == 0)
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continue;
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if ((shells = getvar(V_SHELL, (s_char *)&ship, EF_SHIP)) == 0)
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continue;
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mines_avail = min(shells, mines);
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if (getsect(ship.shp_x, ship.shp_y, §) == 0 ||
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(sect.sct_type != SCT_WATER &&
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sect.sct_type != SCT_BSPAN)) {
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pr("You can't lay mines there!!\n");
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continue;
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}
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mines_there = getvar(V_MINE, (s_char *)§, EF_SECTOR);
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putvar(V_SHELL, shells - mines_avail, (s_char *)&ship, EF_SHIP);
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putvar(V_MINE, mines_avail + mines_there, (s_char *)§,
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EF_SECTOR);
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putsect(§);
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ship.shp_mission = 0;
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putship(ship.shp_uid, &ship);
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pr("Laying %d mines from %s\n", mines_avail, prship(&ship));
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if (mines_avail &&
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map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
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writemap(player->cnum);
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}
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return RET_OK;
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}
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/*
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* format: landmine <UNITS> <NUMBER MINES>
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*/
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int
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landmine(void)
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{
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struct lndstr land;
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struct sctstr sect;
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struct lchrstr *lp;
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struct nstr_item ni;
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int shells;
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int mines_there;
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int mines_wanted;
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int mines_laid;
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int total_mines_laid;
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s_char prompt[128];
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if (!snxtitem(&ni, EF_LAND, player->argp[1]))
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return RET_SYN;
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while (nxtitem(&ni, (s_char *)&land)) {
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if (!player->owner)
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continue;
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lp = &lchr[(int)land.lnd_type];
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if (!(lp->l_flags & L_ENGINEER))
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continue;
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if (land.lnd_mobil < 1) {
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pr("Unit %d is out of mobility\n", land.lnd_uid);
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continue;
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}
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resupply_commod(&land,I_SHELL);
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if (!(shells = getvar(V_SHELL, (s_char *)&land, EF_LAND)))
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continue;
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shells = min(shells, land.lnd_mobil);
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if (!getsect(land.lnd_x, land.lnd_y, §) ||
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sect.sct_type == SCT_WATER ||
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sect.sct_type == SCT_BSPAN) {
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pr("You can't lay mines there!!\n");
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continue;
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}
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mines_there = getvar(V_MINE, (s_char *)§, EF_SECTOR);
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if (sect.sct_own == sect.sct_oldown)
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pr("There are currently %d mines in %s\n",
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mines_there,xyas(sect.sct_x,sect.sct_y,player->cnum));
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sprintf(prompt, "Drop how many mines from %s? ",
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prland(&land));
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mines_wanted = onearg(player->argp[2], prompt);
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if (!check_land_ok(&land))
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continue;
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if (mines_wanted <= 0)
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continue;
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land.lnd_mission = 0;
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total_mines_laid = 0;
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while (shells > 0 && total_mines_laid < mines_wanted) {
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mines_laid = min(shells, mines_wanted - total_mines_laid);
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putvar(V_SHELL, shells - mines_laid, (s_char *)&land, EF_LAND);
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land.lnd_mobil -= mines_laid;
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putland(land.lnd_uid, &land);
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resupply_commod(&land, I_SHELL);
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putland(land.lnd_uid, &land);
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total_mines_laid += mines_laid;
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shells = getvar(V_SHELL, (s_char *)&land, EF_LAND);
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shells = min(shells, land.lnd_mobil);
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}
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getsect(sect.sct_x, sect.sct_y, §);
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putvar(V_MINE, total_mines_laid + mines_there, (s_char *)§,
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EF_SECTOR);
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putsect(§);
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if (shells)
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pr("%s laid a total of %d mines in %s\n",
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prland(&land), total_mines_laid,
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xyas(sect.sct_x,sect.sct_y,land.lnd_own));
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else
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pr("%s ran out of %s before it could finish the job\nOnly %d mines were laid in %s\n",
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prland(&land),
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land.lnd_mobil > 0 ? "supply" : "mobility",
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total_mines_laid,
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xyas(sect.sct_x,sect.sct_y,land.lnd_own));
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}
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return RET_OK;
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}
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