larn/tok.c

   1 #ifndef lint
   2 static char rcsid[] = "$NetBSD: tok.c,v 1.4 1995/04/24 12:24:14 cgd Exp $";
   3 #endif /* not lint */
   4
   5 /* tok.c                Larn is copyrighted 1986 by Noah Morgan. */
   6 #include <sys/types.h>
   7 #ifdef SYSV
   8 #include <fcntl.h>
   9 #include <termio.h>
  10 #else SYSV
  11 #include <sys/ioctl.h>
  12 #endif SYSV
  13 #include "header.h"
  14 #include <string.h>
  15
  16 static char lastok=0;
  17 int yrepcount=0,dayplay=0;
  18 #ifndef FLUSHNO
  19 #define FLUSHNO 5
  20 #endif FLUSHNO
  21 static int flushno=FLUSHNO;     /* input queue flushing threshold */
  22 #define MAXUM 52        /* maximum number of user re-named monsters */
  23 #define MAXMNAME 40     /* max length of a monster re-name */
  24 static char usermonster[MAXUM][MAXMNAME]; /* the user named monster name goes here */
  25 static char usermpoint=0;                       /* the user monster pointer */
  26
  27 /*
  28         lexical analyzer for larn
  29  */
  30 yylex()
  31         {
  32         char cc;
  33         int ic;
  34         if (hit2flag) { hit2flag=0;  yrepcount=0;  return(' '); }
  35         if (yrepcount>0)        { --yrepcount;  return(lastok); } else yrepcount=0;
  36         if (yrepcount==0) { bottomdo(); showplayer(); } /*      show where the player is        */
  37         lflush();
  38         while (1)
  39                 {
  40                 c[BYTESIN]++;
  41                 if (ckpflag)
  42                   if ((c[BYTESIN] % 400) == 0)  /* check for periodic checkpointing */
  43                         {
  44 #ifndef DOCHECKPOINTS
  45                         savegame(ckpfile);
  46 #else
  47                         wait(0);        /* wait for other forks to finish */
  48                         if (fork() == 0) { savegame(ckpfile); exit(); }
  49 #endif
  50
  51
  52 #ifdef TIMECHECK
  53                         if (dayplay==0)
  54                           if (playable())
  55                                 {
  56                                 cursor(1,19);
  57                                 lprcat("\nSorry, but it is now time for work.  Your game has been saved.\n"); beep();
  58                                 lflush();  savegame(savefilename);  wizard=nomove=1;  sleep(4);
  59                                 died(-257);
  60                                 }
  61 #endif TIMECHECK
  62
  63                         }
  64
  65                 do              /* if keyboard input buffer is too big, flush some of it */
  66                         {
  67                         ioctl(0,FIONREAD,&ic);
  68                         if (ic>flushno)   read(0,&cc,1);
  69                         }
  70                 while (ic>flushno);
  71
  72                 if (read(0,&cc,1) != 1) return(lastok = -1);
  73
  74                 if (cc == 'Y'-64)       /* control Y -- shell escape */
  75                         {
  76                         resetscroll();  clear(); /* scrolling region, home, clear, no attributes */
  77                         if ((ic=fork())==0) /* child */
  78                                 {
  79                                 execl("/bin/csh",0);    exit();
  80                                 }
  81                         wait(0);
  82                         if (ic<0) /* error */
  83                                 {
  84                                 write(2,"Can't fork off a shell!\n",25); sleep(2);
  85                                 }
  86
  87                         setscroll();
  88                         return(lastok = 'L'-64);        /* redisplay screen */
  89                         }
  90
  91                 if ((cc <= '9') && (cc >= '0'))
  92                         { yrepcount = yrepcount*10 + cc - '0'; }
  93                 else    { if (yrepcount>0) --yrepcount;  return(lastok = cc); }
  94                 }
  95         }
  96
  97 /*
  98  *      flushall()              Function to flush all type-ahead in the input buffer
  99  */
 100 flushall()
 101         {
 102         char cc;
 103         int ic;
 104         for (;;)                /* if keyboard input buffer is too big, flush some of it */
 105                 {
 106                 ioctl(0,FIONREAD,&ic);
 107                 if (ic<=0) return;
 108                 while (ic>0)   { read(0,&cc,1); --ic; } /* gobble up the byte */
 109                 }
 110         }
 111
 112 /*
 113         function to set the desired hardness
 114         enter with hard= -1 for default hardness, else any desired hardness
 115  */
 116 sethard(hard)
 117         int hard;
 118         {
 119         register int j,k,i;
 120         j=c[HARDGAME]; hashewon();
 121         if (restorflag==0)      /* don't set c[HARDGAME] if restoring game */
 122                 {
 123                 if (hard >= 0) c[HARDGAME]= hard;
 124                 }
 125         else c[HARDGAME]=j; /* set c[HARDGAME] to proper value if restoring game */
 126
 127         if (k=c[HARDGAME])
 128           for (j=0; j<=MAXMONST+8; j++)
 129                 {
 130                 i = ((6+k)*monster[j].hitpoints+1)/6;
 131                 monster[j].hitpoints = (i<0) ? 32767 : i;
 132                 i = ((6+k)*monster[j].damage+1)/5;
 133                 monster[j].damage = (i>127) ? 127 : i;
 134                 i = (10*monster[j].gold)/(10+k);
 135                 monster[j].gold = (i>32767) ? 32767 : i;
 136                 i = monster[j].armorclass - k;
 137                 monster[j].armorclass = (i< -127) ? -127 : i;
 138                 i = (7*monster[j].experience)/(7+k) + 1;
 139                 monster[j].experience = (i<=0) ? 1 : i;
 140                 }
 141         }
 142
 143 /*
 144         function to read and process the larn options file
 145  */
 146 readopts()
 147         {
 148         register char *i;
 149         register int j,k;
 150         int flag;
 151         flag=1; /* set to 0 if he specifies a name for his character */
 152         if (lopen(optsfile) < 0)
 153                 {
 154                 strcpy(logname,loginname); return; /* user name if no character name */
 155                 }
 156         i = " ";
 157         while (*i)
 158           {
 159           if ((i=(char *)lgetw()) == 0) break; /* check for EOF */
 160           while ((*i==' ') || (*i=='\t')) i++; /* eat leading whitespace */
 161           switch(*i)
 162                 {
 163                 case 'b':       if (strcmp(i,"bold-objects") == 0)  boldon=1;
 164                                         break;
 165
 166                 case 'e':       if (strcmp(i,"enable-checkpointing") == 0) ckpflag=1;
 167                                         break;
 168
 169                 case 'i':       if (strcmp(i,"inverse-objects") == 0)  boldon=0;
 170                                         break;
 171
 172                 case 'f':       if (strcmp(i,"female")  == 0)   sex=0; /* male or female */
 173                                         break;
 174
 175                 case 'm':       if (strcmp(i,"monster:")== 0)   /* name favorite monster */
 176                                                 {
 177                                                 if ((i=lgetw())==0) break;
 178                                                 if (strlen(i)>=MAXMNAME) i[MAXMNAME-1]=0;
 179                                                 strcpy(usermonster[usermpoint],i);
 180                                                 if (usermpoint >= MAXUM) break; /* defined all of em */
 181                                                 if (isalpha(j=usermonster[usermpoint][0]))
 182                                                         {
 183                                                         for (k=1; k<MAXMONST+8; k++) /* find monster */
 184                                                           if (monstnamelist[k] == j)
 185                                                                 {
 186                                                                 monster[k].name = &usermonster[usermpoint++][0];
 187                                                                 break;
 188                                                                 }
 189                                                         }
 190                                                 }
 191                                         else if (strcmp(i,"male") == 0) sex=1;
 192                                         break;
 193
 194                 case 'n':       if (strcmp(i,"name:") == 0) /* defining players name */
 195                                                 {
 196                                                 if ((i=lgetw())==0) break;
 197                                                 if (strlen(i)>=LOGNAMESIZE) i[LOGNAMESIZE-1]=0;
 198                                                 strcpy(logname,i); flag=0;
 199                                                 }
 200                                         else if (strcmp(i,"no-introduction") == 0) nowelcome=1;
 201                                         else if (strcmp(i,"no-beep") == 0) nobeep=1;
 202                                         break;
 203
 204                 case 'p':       if (strcmp(i,"process-name:")== 0)
 205                                                 {
 206                                                 if ((i=lgetw())==0) break;
 207                                                 if (strlen(i)>=PSNAMESIZE) i[PSNAMESIZE-1]=0;
 208                                                 strcpy(psname,i);
 209                                                 }
 210                                         else if (strcmp(i,"play-day-play") == 0)  dayplay=1;
 211                                         break;
 212
 213                 case 's':       if (strcmp(i,"savefile:") == 0) /* defining savefilename */
 214                                                 {
 215                                                 if ((i=lgetw())==0) break;
 216                                                 strcpy(savefilename,i); flag=0;
 217                                                 }
 218                                         break;
 219                 };
 220           }
 221         if (flag)  strcpy(logname,loginname);
 222         }
 223