games/larn/tok.c

   1 /* tok.c                Larn is copyrighted 1986 by Noah Morgan. */
   2 /* $FreeBSD: src/games/larn/tok.c,v 1.5 1999/11/16 02:57:25 billf Exp $ */
   3 #include <sys/types.h>
   4 #include <sys/ioctl.h>
   5 #include <sys/wait.h>
   6 #include "header.h"
   7
   8 /* Keystrokes (roughly) between checkpoints */
   9 #define CHECKPOINT_INTERVAL     400
  10
  11 static char lastok = 0;
  12 int yrepcount = 0, dayplay = 0;
  13 #ifndef FLUSHNO
  14 #define FLUSHNO 5
  15 #endif /* FLUSHNO */
  16 static int flushno = FLUSHNO;   /* input queue flushing threshold */
  17 #define MAXUM 52                /* maximum number of user re-named monsters */
  18 #define MAXMNAME 40             /* max length of a monster re-name */
  19 static char usermonster[MAXUM][MAXMNAME];       /* the user named monster name goes here */
  20 static char usermpoint = 0;     /* the user monster pointer */
  21
  22 /*
  23         lexical analyzer for larn
  24  */
  25 int
  26 yylex(void)
  27 {
  28         char cc;
  29         int ic;
  30         if (hit2flag) {
  31                 hit2flag = 0;
  32                 yrepcount = 0;
  33                 return (' ');
  34         }
  35         if (yrepcount > 0) {
  36                 --yrepcount;
  37                 return (lastok);
  38         } else
  39                 yrepcount = 0;
  40         if (yrepcount == 0) {
  41                 bottomdo();
  42                 showplayer();
  43         }                       /* show where the player is */
  44         lflush();
  45         while (1) {
  46                 c[BYTESIN]++;
  47                 /* check for periodic checkpointing */
  48                 if (ckpflag)
  49                         if ((c[BYTESIN] % CHECKPOINT_INTERVAL) == 0) {
  50 #ifndef DOCHECKPOINTS
  51                                 savegame(ckpfile);
  52 #else
  53                                 wait(0);        /* wait for other forks to finish */
  54                                 if (fork() == 0) {
  55                                         savegame(ckpfile);
  56                                         exit(0);
  57                                 }
  58 #endif
  59 #ifdef TIMECHECK
  60                                 if (dayplay == 0)
  61                                         if (playable()) {
  62                                                 cursor(1, 19);
  63                                                 lprcat("\nSorry, but it is now time for work.  Your game has been saved.\n");
  64                                                 beep();
  65                                                 lflush();
  66                                                 savegame(savefilename);
  67                                                 wizard = nomove = 1;
  68                                                 sleep(4);
  69                                                 died(-257);
  70                                         }
  71 #endif /* TIMECHECK */
  72                         }
  73
  74                 do {            /* if keyboard input buffer is too big, flush some of it */
  75                         ioctl(0, FIONREAD, &ic);
  76                         if (ic > flushno)
  77                                 read(0, &cc, 1);
  78                 } while (ic > flushno);
  79
  80                 if (read(0, &cc, 1) != 1)
  81                         return (lastok = -1);
  82
  83                 if (cc == 'Y' - 64) {   /* control Y -- shell escape */
  84                         resetscroll();
  85                         clear();        /* scrolling region, home, clear, no attributes */
  86                         if ((ic = fork()) == 0) {       /* child */
  87                                 /* revoke */
  88                                 setgid(getgid());
  89                                 execl("/bin/csh", "csh", NULL);
  90                                 exit(1);
  91                         }
  92                         wait(0);
  93                         if (ic < 0) {   /* error */
  94                                 write(2, "Can't fork off a shell!\n", 25);
  95                                 sleep(2);
  96                         }
  97
  98                         setscroll();
  99                         return (lastok = 'L' - 64);     /* redisplay screen */
 100                 }
 101
 102                 if ((cc <= '9') && (cc >= '0')) {
 103                         yrepcount = yrepcount * 10 + cc - '0';
 104                 } else {
 105                         if (yrepcount > 0)
 106                                 --yrepcount;
 107                         return (lastok = cc);
 108                 }
 109         }
 110 }
 111
 112 /*
 113  *      flushall()              Function to flush all type-ahead in the input buffer
 114  */
 115 void
 116 flushall(void)
 117 {
 118         char cc;
 119         int ic;
 120         for (;;) {              /* if keyboard input buffer is too big, flush some of it */
 121                 ioctl(0, FIONREAD, &ic);
 122                 if (ic <= 0)
 123                         return;
 124                 while (ic > 0) {
 125                         read(0, &cc, 1);
 126                         --ic;
 127                 }               /* gobble up the byte */
 128         }
 129 }
 130
 131 /*
 132         function to set the desired hardness
 133         enter with hard= -1 for default hardness, else any desired hardness
 134  */
 135 void
 136 sethard(int hard)
 137 {
 138         int j, k, i;
 139         j = c[HARDGAME];
 140         hashewon();
 141         if (restorflag == 0) {  /* don't set c[HARDGAME] if restoring game */
 142                 if (hard >= 0)
 143                         c[HARDGAME] = hard;
 144         } else
 145                 c[HARDGAME] = j;        /* set c[HARDGAME] to proper value if restoring game */
 146
 147         if ((k = c[HARDGAME]) != 0)
 148                 for (j = 0; j <= MAXMONST + 8; j++) {
 149                         i = ((6 + k) * monster[j].hitpoints + 1) / 6;
 150                         monster[j].hitpoints = (i < 0) ? 32767 : i;
 151                         i = ((6 + k) * monster[j].damage + 1) / 5;
 152                         monster[j].damage = (i > 127) ? 127 : i;
 153                         i = (10 * monster[j].gold) / (10 + k);
 154                         monster[j].gold = (i > 32767) ? 32767 : i;
 155                         i = monster[j].armorclass - k;
 156                         monster[j].armorclass = (i < -127) ? -127 : i;
 157                         i = (7 * monster[j].experience) / (7 + k) + 1;
 158                         monster[j].experience = (i <= 0) ? 1 : i;
 159                 }
 160 }
 161
 162 /*
 163         function to read and process the larn options file
 164  */
 165 void
 166 readopts(void)
 167 {
 168         char *i;
 169         int j, k;
 170         int flag;
 171
 172         flag = 1;               /* set to 0 if a name is specified */
 173         if (lopen(optsfile) < 0) {
 174                 strcpy(logname, loginname);
 175                 return;                            /* user name if no character name */
 176         }
 177         do {
 178                 if ((i = (char *)lgetw()) == NULL)
 179                         break;  /* check for EOF */
 180                 while ((*i == ' ') || (*i == '\t'))
 181                         i++;    /* eat leading whitespace */
 182                 switch (*i) {
 183                 case 'b':
 184                         if (strcmp(i, "bold-objects") == 0)
 185                                 boldon = 1;
 186                         break;
 187
 188                 case 'e':
 189                         if (strcmp(i, "enable-checkpointing") == 0)
 190                                 ckpflag = 1;
 191                         break;
 192
 193                 case 'i':
 194                         if (strcmp(i, "inverse-objects") == 0)
 195                                 boldon = 0;
 196                         break;
 197
 198                 case 'f':
 199                         if (strcmp(i, "female") == 0)
 200                                 sex = 0;        /* male or female */
 201                         break;
 202
 203                 case 'm':
 204                         if (strcmp(i, "monster:") == 0) {       /* name favorite monster */
 205                                 if ((i = lgetw()) == NULL)
 206                                         break;
 207                                 if (strlen(i) >= MAXMNAME)
 208                                         i[MAXMNAME - 1] = 0;
 209                                 strcpy(usermonster[(int)usermpoint], i);
 210                                 if (usermpoint >= MAXUM)
 211                                         break;          /* defined all of em */
 212                                 if (isalpha(j = usermonster[(int)usermpoint][0])) {
 213                                         for (k = 1; k < MAXMONST + 8; k++)      /* find monster */
 214                                                 if (monstnamelist[k] == j) {
 215                                                         monster[k].name = &usermonster[(int)usermpoint++][0];
 216                                                         break;
 217                                                 }
 218                                 }
 219                         } else if (strcmp(i, "male") == 0)
 220                                 sex = 1;
 221                         break;
 222
 223                 case 'n':
 224                         if (strcmp(i, "name:") == 0) {  /* defining players name */
 225                                 if ((i = lgetw()) == NULL)
 226                                         break;
 227                                 if (strlen(i) >= LOGNAMESIZE) i[LOGNAMESIZE - 1] = 0;
 228                                 strcpy(logname, i);
 229                                 flag = 0;
 230                         } else if (strcmp(i, "no-introduction") == 0)
 231                                 nowelcome = 1;
 232                         else if (strcmp(i, "no-beep") == 0)
 233                                 nobeep = 1;
 234                         break;
 235
 236                 case 'p':
 237                         if (strcmp(i, "process-name:") == 0) {
 238                                 if ((i = lgetw()) == NULL)
 239                                         break;
 240                                 if (strlen(i) >= PSNAMESIZE)
 241                                         i[PSNAMESIZE - 1] = 0;
 242                                 strcpy(psname, i);
 243                         } else if (strcmp(i, "play-day-play") == 0)
 244                                 dayplay = 1;
 245                         break;
 246
 247                 case 's':
 248                         if (strcmp(i, "savefile:") == 0) {      /* defining savefilename */
 249                                 if ((i = lgetw()) == NULL)
 250                                         break;
 251                                 strcpy(savefilename, i);
 252                                 flag = 0;
 253                         }
 254                         break;
 255                 }
 256         } while (*i);
 257         if (flag)
 258                 strcpy(logname, loginname);
 259 }