games/battlestar/fly.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)fly.c    8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/battlestar/fly.c,v 1.6.2.1 2001/03/05 11:45:36 kris Exp $
  35  * $DragonFly: src/games/battlestar/fly.c,v 1.4 2006/08/08 18:47:20 pavalos Exp $
  36  */
  37
  38 #include "externs.h"
  39 #undef UP
  40 #include <curses.h>
  41
  42 #define abs(a)  ((a) < 0 ? -(a) : (a))
  43 #define MIDR  (LINES/2 - 1)
  44 #define MIDC  (COLS/2 - 1)
  45
  46 int row, column;
  47 int dr = 0, dc = 0;
  48 char destroyed;
  49 int gclock = 120;               /* gtime for all the flights in the game */
  50 char cross = 0;
  51 sig_t oldsig;
  52
  53 static void     blast (void);
  54 static void     endfly (void);
  55 static void     moveenemy (int);
  56 static void     notarget (void);
  57 static void     succumb (int);
  58 static void     screen (void);
  59 static void     target (void);
  60
  61 static void
  62 succumb(int sig)
  63 {
  64         sig = 0;
  65         if (oldsig == SIG_DFL) {
  66                 endfly();
  67                 exit(1);
  68         }
  69         if (oldsig != SIG_IGN) {
  70                 endfly();
  71                 (*oldsig)(SIGINT);
  72         }
  73 }
  74
  75 int
  76 visual(void)
  77 {
  78         destroyed = 0;
  79         if(initscr() == NULL){
  80                 puts("Whoops!  No more memory...");
  81                 return(0);
  82         }
  83         oldsig = signal(SIGINT, succumb);
  84         crmode();
  85         noecho();
  86         screen();
  87         row = rnd(LINES-3) + 1;
  88         column = rnd(COLS-2) + 1;
  89         moveenemy(0);
  90         for (;;) {
  91                 switch(getchar()){
  92
  93                         case 'h':
  94                         case 'r':
  95                                 dc = -1;
  96                                 fuel--;
  97                                 break;
  98
  99                         case 'H':
 100                         case 'R':
 101                                 dc = -5;
 102                                 fuel -= 10;
 103                                 break;
 104
 105                         case 'l':
 106                                 dc = 1;
 107                                 fuel--;
 108                                 break;
 109
 110                         case 'L':
 111                                 dc = 5;
 112                                 fuel -= 10;
 113                                 break;
 114
 115                         case 'j':
 116                         case 'u':
 117                                 dr = 1;
 118                                 fuel--;
 119                                 break;
 120
 121                         case 'J':
 122                         case 'U':
 123                                 dr = 5;
 124                                 fuel -= 10;
 125                                 break;
 126
 127                         case 'k':
 128                         case 'd':
 129                                 dr = -1;
 130                                 fuel--;
 131                                 break;
 132
 133                         case 'K':
 134                         case 'D':
 135                                 dr = -5;
 136                                 fuel -= 10;
 137                                 break;
 138
 139                         case '+':
 140                                 if (cross){
 141                                         cross = 0;
 142                                         notarget();
 143                                 }
 144                                 else
 145                                         cross = 1;
 146                                 break;
 147
 148                         case ' ':
 149                         case 'f':
 150                                 if (torps){
 151                                         torps -= 2;
 152                                         blast();
 153                                         if (row == MIDR && column - MIDC < 2 && MIDC - column < 2){
 154                                                 destroyed = 1;
 155                                                 alarm(0);
 156                                         }
 157                                 }
 158                                 else
 159                                         mvaddstr(0,0,"*** Out of torpedoes. ***");
 160                                 break;
 161
 162                         case 'q':
 163                                 endfly();
 164                                 return(0);
 165
 166                         default:
 167                                 mvaddstr(0,26,"Commands = r,R,l,L,u,U,d,D,f,+,q");
 168                                 continue;
 169
 170                         case EOF:
 171                                 break;
 172                 }
 173                 if (destroyed){
 174                         endfly();
 175                         return(1);
 176                 }
 177                 if (gclock <= 0){
 178                         endfly();
 179                         die(0);
 180                 }
 181         }
 182         /* NOTREACHED */
 183         return(1);
 184 }
 185
 186 static void
 187 screen(void)
 188 {
 189         int r,c,n;
 190         int i;
 191
 192         clear();
 193         i = rnd(100);
 194         for (n=0; n < i; n++){
 195                 r = rnd(LINES-3) + 1;
 196                 c = rnd(COLS);
 197                 mvaddch(r, c, '.');
 198         }
 199         mvaddstr(LINES-1-1,21,"TORPEDOES           FUEL           TIME");
 200         refresh();
 201 }
 202
 203 static void
 204 target(void)
 205 {
 206         int n;
 207
 208         move(MIDR,MIDC-10);
 209         addstr("-------   +   -------");
 210         for (n = MIDR-4; n < MIDR-1; n++){
 211                 mvaddch(n,MIDC,'|');
 212                 mvaddch(n+6,MIDC,'|');
 213         }
 214 }
 215
 216 static void
 217 notarget(void)
 218 {
 219         int n;
 220
 221         move(MIDR,MIDC-10);
 222         addstr("                     ");
 223         for (n = MIDR-4; n < MIDR-1; n++){
 224                 mvaddch(n,MIDC,' ');
 225                 mvaddch(n+6,MIDC,' ');
 226         }
 227 }
 228
 229 static void
 230 blast(void)
 231 {
 232         int n;
 233
 234         alarm(0);
 235         move(LINES-1, 24);
 236         printw((char *)(uintptr_t)(const void *)"%3d", torps);
 237         for(n = LINES-1-2; n >= MIDR + 1; n--){
 238                 mvaddch(n, MIDC+MIDR-n, '/');
 239                 mvaddch(n, MIDC-MIDR+n, '\\');
 240                 refresh();
 241         }
 242         mvaddch(MIDR,MIDC,'*');
 243         for(n = LINES-1-2; n >= MIDR + 1; n--){
 244                 mvaddch(n, MIDC+MIDR-n, ' ');
 245                 mvaddch(n, MIDC-MIDR+n, ' ');
 246                 refresh();
 247         }
 248         alarm(1);
 249 }
 250
 251 static void
 252 moveenemy(int sig)
 253 {
 254         double d;
 255         int oldr, oldc;
 256
 257         sig = 0;
 258         oldr = row;
 259         oldc = column;
 260         if (fuel > 0){
 261                 if (row + dr <= LINES-3 && row + dr > 0)
 262                         row += dr;
 263                 if (column + dc < COLS-1 && column + dc > 0)
 264                         column += dc;
 265         } else if (fuel < 0){
 266                 fuel = 0;
 267                 mvaddstr(0,60,"*** Out of fuel ***");
 268         }
 269         d = (double) ((row - MIDR)*(row - MIDR) + (column - MIDC)*(column - MIDC));
 270         if (d < 16){
 271                 row += (rnd(9) - 4) % (4 - abs(row - MIDR));
 272                 column += (rnd(9) - 4) % (4 - abs(column - MIDC));
 273         }
 274         gclock--;
 275         mvaddstr(oldr, oldc - 1, "   ");
 276         if (cross)
 277                 target();
 278         mvaddstr(row, column - 1, "/-\\");
 279         move(LINES-1, 24);
 280         printw((char *)(uintptr_t)(const void *)"%3d", torps);
 281         move(LINES-1, 42);
 282         printw((char *)(uintptr_t)(const void *)"%3d", fuel);
 283         move(LINES-1, 57);
 284         printw((char *)(uintptr_t)(const void *)"%3d", gclock);
 285         refresh();
 286         signal(SIGALRM, moveenemy);
 287         alarm(1);
 288 }
 289
 290 static void
 291 endfly(void)
 292 {
 293         alarm(0);
 294         signal(SIGALRM, SIG_DFL);
 295         mvcur(0,COLS-1,LINES-1,0);
 296         endwin();
 297         signal(SIGTSTP, SIG_DFL);
 298         signal(SIGINT, oldsig);
 299 }