1 /* 2 * Empire - A multi-player, client/server Internet based war game. 3 * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak, 4 * Ken Stevens, Steve McClure, Markus Armbruster 5 * 6 * Empire is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 * 19 * --- 20 * 21 * See files README, COPYING and CREDITS in the root of the source 22 * tree for related information and legal notices. It is expected 23 * that future projects/authors will amend these files as needed. 24 * 25 * --- 26 * 27 * ship.h: Definitions for things having to do with ships 28 * 29 * Known contributors to this file: 30 * Dave Pare 31 * Thomas Ruschak, 1992 32 * Ken Stevens, 1995 33 * Steve McClure, 1998 34 * Markus Armbruster, 2004-2020 35 */ 36 37 #ifndef SHIP_H 38 #define SHIP_H 39 40 #include "file.h" 41 #include "item.h" 42 #include "retreat.h" 43 #include "types.h" 44 45 #define SHIP_MINEFF 20 46 47 #define MAXSHPNAMLEN 24 48 49 struct shpstr { 50 /* initial part must match struct empobj */ 51 signed ef_type: 8; 52 unsigned shp_seqno: 12; 53 unsigned shp_generation: 12; 54 int shp_uid; /* unit it (ship #) */ 55 time_t shp_timestamp; /* Last time this ship was touched. */ 56 natid shp_own; /* owner's country num */ 57 coord shp_x; /* x location in abs coords */ 58 coord shp_y; /* y location in abs coords */ 59 signed char shp_type; /* index in mchr[] */ 60 signed char shp_effic; /* 0% to 100% */ 61 signed char shp_mobil; /* mobility units */ 62 unsigned char shp_off; /* repairs stopped? */ 63 short shp_tech; /* tech level ship was built at */ 64 char shp_fleet; /* group membership */ 65 coord shp_opx, shp_opy; /* Op sector coords */ 66 short shp_mission; /* mission code */ 67 short shp_radius; /* mission radius */ 68 /* end of part matching struct empobj */ 69 short shp_item[I_MAX+1]; /* amount of items on board */ 70 short shp_pstage; /* plague stage */ 71 short shp_ptime; /* how many ETUs remain in this stage */ 72 short shp_access; /* Last tick mob was updated (MOB_ACCESS) */ 73 char shp_name[MAXSHPNAMLEN]; /* name set with the "name" command */ 74 coord shp_orig_x; 75 coord shp_orig_y; /* Where we were built */ 76 natid shp_orig_own; /* Who built us */ 77 int shp_rflags; /* When do I retreat? */ 78 char shp_rpath[RET_LEN]; /* retreat path */ 79 }; 80 81 struct mchrstr { 82 short m_item[I_MAX+1]; /* load limit */ 83 int m_armor; /* how well armored it is */ 84 int m_speed; /* how fast it can go */ 85 int m_visib; /* how well it can be seen */ 86 int m_vrnge; /* how well it can see */ 87 int m_frnge; /* how far it can fire */ 88 int m_glim; /* how many guns it can fire */ 89 unsigned char m_nxlight; /* maximum number of xlight planes */ 90 unsigned char m_nchoppers; /* maximum number of choppers */ 91 char *m_name; /* full name of type of ship */ 92 short m_mat[I_MAX+1]; /* materials to build 100% */ 93 /* only I_LCM and I_HCM non-zero */ 94 int m_bwork; /* work to build 100% */ 95 int m_tech; /* tech required to build */ 96 int m_cost; /* how much it costs to build */ 97 int m_flags; /* what special things can this ship do */ 98 unsigned char m_nplanes; /* maximum number of planes this ship holds */ 99 unsigned char m_nland; /* maximum number of units this ship holds */ 100 signed char m_type; /* index in mchr[] */ 101 }; 102 103 #define M_FOOD bit(0) /* catch that fish! */ 104 #define M_TORP bit(1) /* fire torpedoes */ 105 #define M_DCH bit(2) /* drop depth charges on subs */ 106 #define M_FLY bit(3) /* launch and recover planes */ 107 #define M_MSL bit(4) /* launch missiles */ 108 #define M_OIL bit(5) /* drill for oil */ 109 #define M_SONAR bit(6) /* locate submarines */ 110 #define M_MINE bit(7) /* drop mines */ 111 #define M_SWEEP bit(8) /* clean up the mines */ 112 #define M_SUB bit(9) /* a submarine */ 113 /* unused bit(10) */ 114 #define M_LAND bit(11) /* allows full landing ability */ 115 #define M_SUBT bit(12) /* allows torping of other subs */ 116 #define M_TRADE bit(13) /* is a trade ship */ 117 #define M_SEMILAND bit(14) /* can land 1/4 */ 118 /* unused bit(15) */ 119 /* unused bit(16) */ 120 /* unused bit(17) */ 121 #define M_SUPPLY bit(18) /* Can supply units/sects/ships */ 122 #define M_CANAL bit(19) /* Can navigate a canal (BIG CITY) */ 123 #define M_ANTIMISSILE bit(20) /* Shoot down missile */ 124 125 #define getship(n, p) ef_read(EF_SHIP, (n), (p)) 126 #define putship(n, p) ef_write(EF_SHIP, (n), (p)) 127 #define getshipp(n) ((struct shpstr *)ef_ptr(EF_SHIP, (n))) 128 129 #define MCHR_SZ 128 130 extern struct mchrstr mchr[MCHR_SZ]; 131 132 enum { 133 SHP_AIROPS_EFF = 50, /* min. efficiency for air ops */ 134 SHP_TORP_SHELLS = 3 /* number of shells used by a torpedo */ 135 }; 136 137 /* Whether and why a ship is stuck in a sector */ 138 enum shp_stuck { 139 SHP_STUCK_NOT, /* not stuck */ 140 SHP_STUCK_CONSTRUCTION, /* sector not efficient enough */ 141 SHP_STUCK_CANAL, /* ship lacks M_CANAL */ 142 SHP_STUCK_IMPASSABLE /* sector type not navigable */ 143 }; 144 145 extern int m_armor(struct mchrstr *, int); 146 extern int m_speed(struct mchrstr *, int); 147 extern int m_visib(struct mchrstr *, int); 148 extern int m_frnge(struct mchrstr *, int); 149 extern int m_glim(struct mchrstr *, int); 150 extern int shp_armor(struct shpstr *); 151 extern int shp_speed(struct shpstr *); 152 extern int shp_visib(struct shpstr *); 153 extern int shp_frnge(struct shpstr *); 154 extern int shp_glim(struct shpstr *); 155 156 extern int shp_nplane(struct shpstr *, int *, int *, int *); 157 extern int shp_nland(struct shpstr *); 158 159 extern int shp_dchrg(struct shpstr *); 160 extern int shp_fire(struct shpstr *); 161 extern int shp_torp(struct shpstr *, int); 162 extern double shp_fire_range(struct shpstr *); 163 extern int shp_usable_guns(struct shpstr *); 164 extern double shp_torp_hitchance(struct shpstr *, int); 165 166 /* src/lib/subs/shpsub.c */ 167 extern int shp_may_nav(struct shpstr *, struct shpstr *, char *); 168 extern void shp_sel(struct nstr_item *, struct emp_qelem *); 169 extern struct ulist *shp_insque(struct shpstr *, struct emp_qelem *); 170 extern void shp_nav_stay_behind(struct emp_qelem *, natid); 171 extern void shp_nav_put(struct emp_qelem *, natid); 172 extern int shp_sweep(struct emp_qelem *, int, int, natid); 173 extern enum shp_stuck shp_check_nav(struct shpstr *, struct sctstr *); 174 extern int sect_has_dock(struct sctstr *); 175 extern int shp_hardtarget(struct shpstr *); 176 extern int shp_nav_dir(struct emp_qelem *, int, natid); 177 extern int shp_nav_gauntlet(struct emp_qelem *, int, natid); 178 extern int shp_missile_defense(coord, coord, natid, int); 179 extern void shp_missdef(struct shpstr *, natid); 180 extern double shp_mobcost(struct shpstr *); 181 extern void shp_set_tech(struct shpstr *, int); 182 183 #endif 184