larn/tok.c

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