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 /* $DragonFly: src/games/larn/tok.c,v 1.2 2003/06/17 04:25:24 dillon Exp $ */
   4 #include <sys/types.h>
   5 #ifdef SYSV
   6 #include <fcntl.h>
   7 #include <termio.h>
   8 #else SYSV
   9 #include <sys/ioctl.h>
  10 #endif SYSV
  11 #include "header.h"
  12
  13 static char lastok=0;
  14 int yrepcount=0,dayplay=0;
  15 #ifndef FLUSHNO
  16 #define FLUSHNO 5
  17 #endif FLUSHNO
  18 static int flushno=FLUSHNO;     /* input queue flushing threshold */
  19 #define MAXUM 52        /* maximum number of user re-named monsters */
  20 #define MAXMNAME 40     /* max length of a monster re-name */
  21 static char usermonster[MAXUM][MAXMNAME]; /* the user named monster name goes here */
  22 static char usermpoint=0;                       /* the user monster pointer */
  23
  24 /*
  25         lexical analyzer for larn
  26  */
  27 yylex()
  28         {
  29         char cc;
  30         int ic;
  31         if (hit2flag) { hit2flag=0;  yrepcount=0;  return(' '); }
  32         if (yrepcount>0)        { --yrepcount;  return(lastok); } else yrepcount=0;
  33         if (yrepcount==0) { bottomdo(); showplayer(); } /*      show where the player is        */
  34         lflush();
  35         while (1)
  36                 {
  37                 c[BYTESIN]++;
  38                 if (ckpflag)
  39                   if ((c[BYTESIN] % 400) == 0)  /* check for periodic checkpointing */
  40                         {
  41 #ifndef DOCHECKPOINTS
  42                         savegame(ckpfile);
  43 #else
  44                         wait(0);        /* wait for other forks to finish */
  45                         if (fork() == 0) { savegame(ckpfile); exit(0); }
  46 #endif
  47
  48
  49 #ifdef TIMECHECK
  50                         if (dayplay==0)
  51                           if (playable())
  52                                 {
  53                                 cursor(1,19);
  54                                 lprcat("\nSorry, but it is now time for work.  Your game has been saved.\n"); beep();
  55                                 lflush();  savegame(savefilename);  wizard=nomove=1;  sleep(4);
  56                                 died(-257);
  57                                 }
  58 #endif TIMECHECK
  59
  60                         }
  61
  62                 do              /* if keyboard input buffer is too big, flush some of it */
  63                         {
  64                         ioctl(0,FIONREAD,&ic);
  65                         if (ic>flushno)   read(0,&cc,1);
  66                         }
  67                 while (ic>flushno);
  68
  69                 if (read(0,&cc,1) != 1) return(lastok = -1);
  70
  71                 if (cc == 'Y'-64)       /* control Y -- shell escape */
  72                         {
  73                         resetscroll();  clear(); /* scrolling region, home, clear, no attributes */
  74                         if ((ic=fork())==0) /* child */
  75                                 {
  76                                 /* revoke */
  77                                 setgid(getgid());
  78                                 execl("/bin/csh",0);    exit(1);
  79                                 }
  80                         wait(0);
  81                         if (ic<0) /* error */
  82                                 {
  83                                 write(2,"Can't fork off a shell!\n",25); sleep(2);
  84                                 }
  85
  86                         setscroll();
  87                         return(lastok = 'L'-64);        /* redisplay screen */
  88                         }
  89
  90                 if ((cc <= '9') && (cc >= '0'))
  91                         { yrepcount = yrepcount*10 + cc - '0'; }
  92                 else    { if (yrepcount>0) --yrepcount;  return(lastok = cc); }
  93                 }
  94         }
  95
  96 /*
  97  *      flushall()              Function to flush all type-ahead in the input buffer
  98  */
  99 flushall()
 100         {
 101         char cc;
 102         int ic;
 103         for (;;)                /* if keyboard input buffer is too big, flush some of it */
 104                 {
 105                 ioctl(0,FIONREAD,&ic);
 106                 if (ic<=0) return;
 107                 while (ic>0)   { read(0,&cc,1); --ic; } /* gobble up the byte */
 108                 }
 109         }
 110
 111 /*
 112         function to set the desired hardness
 113         enter with hard= -1 for default hardness, else any desired hardness
 114  */
 115 sethard(hard)
 116         int hard;
 117         {
 118         int j,k,i;
 119         j=c[HARDGAME]; hashewon();
 120         if (restorflag==0)      /* don't set c[HARDGAME] if restoring game */
 121                 {
 122                 if (hard >= 0) c[HARDGAME]= hard;
 123                 }
 124         else c[HARDGAME]=j; /* set c[HARDGAME] to proper value if restoring game */
 125
 126         if (k=c[HARDGAME])
 127           for (j=0; j<=MAXMONST+8; j++)
 128                 {
 129                 i = ((6+k)*monster[j].hitpoints+1)/6;
 130                 monster[j].hitpoints = (i<0) ? 32767 : i;
 131                 i = ((6+k)*monster[j].damage+1)/5;
 132                 monster[j].damage = (i>127) ? 127 : i;
 133                 i = (10*monster[j].gold)/(10+k);
 134                 monster[j].gold = (i>32767) ? 32767 : i;
 135                 i = monster[j].armorclass - k;
 136                 monster[j].armorclass = (i< -127) ? -127 : i;
 137                 i = (7*monster[j].experience)/(7+k) + 1;
 138                 monster[j].experience = (i<=0) ? 1 : i;
 139                 }
 140         }
 141
 142 /*
 143         function to read and process the larn options file
 144  */
 145 readopts()
 146         {
 147         char *i;
 148         int j,k;
 149         int flag;
 150         flag=1; /* set to 0 if he specifies a name for his character */
 151         if (lopen(optsfile) < 0)
 152                 {
 153                 strcpy(logname,loginname); return; /* user name if no character name */
 154                 }
 155         i = " ";
 156         while (*i)
 157           {
 158           if ((i=(char *)lgetw()) == 0) break; /* check for EOF */
 159           while ((*i==' ') || (*i=='\t')) i++; /* eat leading whitespace */
 160           switch(*i)
 161                 {
 162                 case 'b':       if (strcmp(i,"bold-objects") == 0)  boldon=1;
 163                                         break;
 164
 165                 case 'e':       if (strcmp(i,"enable-checkpointing") == 0) ckpflag=1;
 166                                         break;
 167
 168                 case 'i':       if (strcmp(i,"inverse-objects") == 0)  boldon=0;
 169                                         break;
 170
 171                 case 'f':       if (strcmp(i,"female")  == 0)   sex=0; /* male or female */
 172                                         break;
 173
 174                 case 'm':       if (strcmp(i,"monster:")== 0)   /* name favorite monster */
 175                                                 {
 176                                                 if ((i=lgetw())==0) break;
 177                                                 if (strlen(i)>=MAXMNAME) i[MAXMNAME-1]=0;
 178                                                 strcpy(usermonster[usermpoint],i);
 179                                                 if (usermpoint >= MAXUM) break; /* defined all of em */
 180                                                 if (isalpha(j=usermonster[usermpoint][0]))
 181                                                         {
 182                                                         for (k=1; k<MAXMONST+8; k++) /* find monster */
 183                                                           if (monstnamelist[k] == j)
 184                                                                 {
 185                                                                 monster[k].name = &usermonster[usermpoint++][0];
 186                                                                 break;
 187                                                                 }
 188                                                         }
 189                                                 }
 190                                         else if (strcmp(i,"male") == 0) sex=1;
 191                                         break;
 192
 193                 case 'n':       if (strcmp(i,"name:") == 0) /* defining players name */
 194                                                 {
 195                                                 if ((i=lgetw())==0) break;
 196                                                 if (strlen(i)>=LOGNAMESIZE) i[LOGNAMESIZE-1]=0;
 197                                                 strcpy(logname,i); flag=0;
 198                                                 }
 199                                         else if (strcmp(i,"no-introduction") == 0) nowelcome=1;
 200                                         else if (strcmp(i,"no-beep") == 0) nobeep=1;
 201                                         break;
 202
 203                 case 'p':       if (strcmp(i,"process-name:")== 0)
 204                                                 {
 205                                                 if ((i=lgetw())==0) break;
 206                                                 if (strlen(i)>=PSNAMESIZE) i[PSNAMESIZE-1]=0;
 207                                                 strcpy(psname,i);
 208                                                 }
 209                                         else if (strcmp(i,"play-day-play") == 0)  dayplay=1;
 210                                         break;
 211
 212                 case 's':       if (strcmp(i,"savefile:") == 0) /* defining savefilename */
 213                                                 {
 214                                                 if ((i=lgetw())==0) break;
 215                                                 strcpy(savefilename,i); flag=0;
 216                                                 }
 217                                         break;
 218                 };
 219           }
 220         if (flag)  strcpy(logname,loginname);
 221         }
 222