battlestar/fly.c

   1 /*      $NetBSD: fly.c,v 1.15 2012/10/13 19:58:53 dholland Exp $        */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)fly.c       8.2 (Berkeley) 4/28/95";
  36 #else
  37 __RCSID("$NetBSD: fly.c,v 1.15 2012/10/13 19:58:53 dholland Exp $");
  38 #endif
  39 #endif                          /* not lint */
  40
  41 #include "extern.h"
  42 #undef UP
  43 #include <curses.h>
  44 #include <assert.h>
  45
  46 #define MIDR  (LINES/2 - 1)
  47 #define MIDC  (COLS/2 - 1)
  48
  49 static int     row, column;
  50 static int     dr = 0, dc = 0;
  51 static char    destroyed;
  52 int     ourclock = 120;         /* time for all the flights in the game */
  53 static char    cross = 0;
  54 static sig_t   oldsig;
  55
  56 static void blast(void);
  57 static void endfly(void);
  58 static void moveenemy(int);
  59 static void notarget(void);
  60 static void screen(void);
  61 static void succumb(int);
  62 static void target(void);
  63
  64 static void
  65 succumb(int dummy __unused)
  66 {
  67         if (oldsig == SIG_DFL) {
  68                 endfly();
  69                 exit(1);
  70         }
  71         if (oldsig != SIG_IGN) {
  72                 endfly();
  73                 (*oldsig) (SIGINT);
  74         }
  75 }
  76
  77 int
  78 visual(void)
  79 {
  80         destroyed = 0;
  81         if (initscr() == NULL) {
  82                 puts("Whoops!  No more memory...");
  83                 return (0);
  84         }
  85         oldsig = signal(SIGINT, succumb);
  86         cbreak();
  87         noecho();
  88         screen();
  89         row = rnd(LINES - 3) + 1;
  90         column = rnd(COLS - 2) + 1;
  91         moveenemy(0);
  92         for (;;) {
  93                 switch (getchar()) {
  94
  95                 case 'h':
  96                 case 'r':
  97                         dc = -1;
  98                         fuel--;
  99                         break;
 100
 101                 case 'H':
 102                 case 'R':
 103                         dc = -5;
 104                         fuel -= 10;
 105                         break;
 106
 107                 case 'l':
 108                         dc = 1;
 109                         fuel--;
 110                         break;
 111
 112                 case 'L':
 113                         dc = 5;
 114                         fuel -= 10;
 115                         break;
 116
 117                 case 'j':
 118                 case 'u':
 119                         dr = 1;
 120                         fuel--;
 121                         break;
 122
 123                 case 'J':
 124                 case 'U':
 125                         dr = 5;
 126                         fuel -= 10;
 127                         break;
 128
 129                 case 'k':
 130                 case 'd':
 131                         dr = -1;
 132                         fuel--;
 133                         break;
 134
 135                 case 'K':
 136                 case 'D':
 137                         dr = -5;
 138                         fuel -= 10;
 139                         break;
 140
 141                 case '+':
 142                         if (cross) {
 143                                 cross = 0;
 144                                 notarget();
 145                         } else
 146                                 cross = 1;
 147                         break;
 148
 149                 case ' ':
 150                 case 'f':
 151                         if (torps) {
 152                                 torps -= 2;
 153                                 blast();
 154                                 if (row == MIDR && column < MIDC + 2 &&
 155                                     column > MIDC - 2) {
 156                                         destroyed = 1;
 157                                         alarm(0);
 158                                 }
 159                         } else
 160                                 mvaddstr(0, 0, "*** Out of torpedoes. ***");
 161                         break;
 162
 163                 case 'q':
 164                         endfly();
 165                         return (0);
 166
 167                 default:
 168                         mvaddstr(0, 26, "Commands = r,R,l,L,u,U,d,D,f,+,q");
 169                         continue;
 170
 171                 case EOF:
 172                         break;
 173                 }
 174                 if (destroyed) {
 175                         endfly();
 176                         return (1);
 177                 }
 178                 if (ourclock <= 0) {
 179                         endfly();
 180                         die();
 181                 }
 182         }
 183 }
 184
 185 static void
 186 screen(void)
 187 {
 188         int     r, c, n;
 189         int     i;
 190
 191         clear();
 192         i = rnd(100);
 193         for (n = 0; n < i; n++) {
 194                 r = rnd(LINES - 3) + 1;
 195                 c = rnd(COLS);
 196                 mvaddch(r, c, '.');
 197         }
 198         mvaddstr(LINES - 1 - 1, 21, "TORPEDOES           FUEL           TIME");
 199         refresh();
 200 }
 201
 202 static void
 203 target(void)
 204 {
 205         int     n;
 206
 207         move(MIDR, MIDC - 10);
 208         addstr("-------   +   -------");
 209         for (n = MIDR - 4; n < MIDR - 1; n++) {
 210                 mvaddch(n, MIDC, '|');
 211                 mvaddch(n + 6, MIDC, '|');
 212         }
 213 }
 214
 215 static void
 216 notarget(void)
 217 {
 218         int     n;
 219
 220         move(MIDR, MIDC - 10);
 221         addstr("                     ");
 222         for (n = MIDR - 4; n < MIDR - 1; n++) {
 223                 mvaddch(n, MIDC, ' ');
 224                 mvaddch(n + 6, MIDC, ' ');
 225         }
 226 }
 227
 228 static void
 229 blast(void)
 230 {
 231         int     n;
 232
 233         alarm(0);
 234         move(LINES - 1, 24);
 235         printw("%3d", torps);
 236         for (n = LINES - 1 - 2; n >= MIDR + 1; n--) {
 237                 mvaddch(n, MIDC + MIDR - n, '/');
 238                 mvaddch(n, MIDC - MIDR + n, '\\');
 239                 refresh();
 240         }
 241         mvaddch(MIDR, MIDC, '*');
 242         for (n = LINES - 1 - 2; n >= MIDR + 1; n--) {
 243                 mvaddch(n, MIDC + MIDR - n, ' ');
 244                 mvaddch(n, MIDC - MIDR + n, ' ');
 245                 refresh();
 246         }
 247         alarm(1);
 248 }
 249
 250 static void
 251 moveenemy(int dummy __unused)
 252 {
 253         double  d;
 254         int     oldr, oldc;
 255
 256         oldr = row;
 257         oldc = column;
 258         if (fuel > 0) {
 259                 if (row + dr <= LINES - 3 && row + dr > 0)
 260                         row += dr;
 261                 if (column + dc < COLS - 1 && column + dc > 0)
 262                         column += dc;
 263         } else
 264                 if (fuel < 0) {
 265                         fuel = 0;
 266                         mvaddstr(0, 60, "*** Out of fuel ***");
 267                 }
 268         d = (double) ((row - MIDR) * (row - MIDR) + (column - MIDC) *
 269             (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         ourclock--;
 275         mvaddstr(oldr, oldc - 1, "   ");
 276         if (cross)
 277                 target();
 278         mvaddstr(row, column - 1, "/-\\");
 279         move(LINES - 1, 24);
 280         printw("%3d", torps);
 281         move(LINES - 1, 42);
 282         printw("%3d", fuel);
 283         move(LINES - 1, 57);
 284         printw("%3d", ourclock);
 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 }