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 1.5 2006/10/08 17:11:30 pavalos Exp $ */
   4 #include <sys/types.h>
   5 #include <sys/wait.h>
   6 #include <sys/ioctl.h>
   7 #include "header.h"
   8
   9 static char lastok=0;
  10 int yrepcount=0,dayplay=0;
  11 #ifndef FLUSHNO
  12 #define FLUSHNO 5
  13 #endif /* FLUSHNO */
  14 static int flushno=FLUSHNO;     /* input queue flushing threshold */
  15 #define MAXUM 52        /* maximum number of user re-named monsters */
  16 #define MAXMNAME 40     /* max length of a monster re-name */
  17 static char usermonster[MAXUM][MAXMNAME]; /* the user named monster name goes here */
  18 static char usermpoint=0;                       /* the user monster pointer */
  19
  20 /*
  21         lexical analyzer for larn
  22  */
  23 int
  24 yylex(void)
  25         {
  26         char cc;
  27         int ic;
  28         if (hit2flag) { hit2flag=0;  yrepcount=0;  return(' '); }
  29         if (yrepcount>0)        { --yrepcount;  return(lastok); } else yrepcount=0;
  30         if (yrepcount==0) { bottomdo(); showplayer(); } /*      show where the player is        */
  31         lflush();
  32         while (1)
  33                 {
  34                 c[BYTESIN]++;
  35                 if (ckpflag)
  36                   if ((c[BYTESIN] % 400) == 0)  /* check for periodic checkpointing */
  37                         {
  38 #ifndef DOCHECKPOINTS
  39                         savegame(ckpfile);
  40 #else
  41                         wait(0);        /* wait for other forks to finish */
  42                         if (fork() == 0) { savegame(ckpfile); exit(0); }
  43 #endif
  44
  45
  46 #ifdef TIMECHECK
  47                         if (dayplay==0)
  48                           if (playable())
  49                                 {
  50                                 cursor(1,19);
  51                                 lprcat("\nSorry, but it is now time for work.  Your game has been saved.\n"); beep();
  52                                 lflush();  savegame(savefilename);  wizard=nomove=1;  sleep(4);
  53                                 died(-257);
  54                                 }
  55 #endif /* TIMECHECK */
  56
  57                         }
  58
  59                 do              /* if keyboard input buffer is too big, flush some of it */
  60                         {
  61                         ioctl(0,FIONREAD,&ic);
  62                         if (ic>flushno)   read(0,&cc,1);
  63                         }
  64                 while (ic>flushno);
  65
  66                 if (read(0,&cc,1) != 1) return(lastok = -1);
  67
  68                 if (cc == 'Y'-64)       /* control Y -- shell escape */
  69                         {
  70                         resetscroll();  clear(); /* scrolling region, home, clear, no attributes */
  71                         if ((ic=fork())==0) /* child */
  72                                 {
  73                                 /* revoke */
  74                                 setgid(getgid());
  75                                 execl("/bin/csh", "csh", NULL);    exit(1);
  76                                 }
  77                         wait(0);
  78                         if (ic<0) /* error */
  79                                 {
  80                                 write(2,"Can't fork off a shell!\n",25); sleep(2);
  81                                 }
  82
  83                         setscroll();
  84                         return(lastok = 'L'-64);        /* redisplay screen */
  85                         }
  86
  87                 if ((cc <= '9') && (cc >= '0'))
  88                         { yrepcount = yrepcount*10 + cc - '0'; }
  89                 else    { if (yrepcount>0) --yrepcount;  return(lastok = cc); }
  90                 }
  91         }
  92
  93 /*
  94  *      flushall()              Function to flush all type-ahead in the input buffer
  95  */
  96 void
  97 flushall(void)
  98         {
  99         char cc;
 100         int ic;
 101         for (;;)                /* if keyboard input buffer is too big, flush some of it */
 102                 {
 103                 ioctl(0,FIONREAD,&ic);
 104                 if (ic<=0) return;
 105                 while (ic>0)   { read(0,&cc,1); --ic; } /* gobble up the byte */
 106                 }
 107         }
 108
 109 /*
 110         function to set the desired hardness
 111         enter with hard= -1 for default hardness, else any desired hardness
 112  */
 113 void
 114 sethard(int hard)
 115         {
 116         int j,k,i;
 117         j=c[HARDGAME]; hashewon();
 118         if (restorflag==0)      /* don't set c[HARDGAME] if restoring game */
 119                 {
 120                 if (hard >= 0) c[HARDGAME]= hard;
 121                 }
 122         else c[HARDGAME]=j; /* set c[HARDGAME] to proper value if restoring game */
 123
 124         if ((k=c[HARDGAME]))
 125           for (j=0; j<=MAXMONST+8; j++)
 126                 {
 127                 i = ((6+k)*monster[j].hitpoints+1)/6;
 128                 monster[j].hitpoints = (i<0) ? 32767 : i;
 129                 i = ((6+k)*monster[j].damage+1)/5;
 130                 monster[j].damage = (i>127) ? 127 : i;
 131                 i = (10*monster[j].gold)/(10+k);
 132                 monster[j].gold = (i>32767) ? 32767 : i;
 133                 i = monster[j].armorclass - k;
 134                 monster[j].armorclass = (i< -127) ? -127 : i;
 135                 i = (7*monster[j].experience)/(7+k) + 1;
 136                 monster[j].experience = (i<=0) ? 1 : i;
 137                 }
 138         }
 139
 140 /*
 141         function to read and process the larn options file
 142  */
 143 void
 144 readopts(void)
 145         {
 146         char *i;
 147         int j,k;
 148         int flag;
 149         flag=1; /* set to 0 if he specifies a name for his character */
 150         if (lopen(optsfile) < 0)
 151                 {
 152                 strcpy(logname,loginname); return; /* user name if no character name */
 153                 }
 154         do
 155           {
 156           if ((i=(char *)lgetw()) == 0) break; /* check for EOF */
 157           while ((*i==' ') || (*i=='\t')) i++; /* eat leading whitespace */
 158           switch(*i)
 159                 {
 160                 case 'b':       if (strcmp(i,"bold-objects") == 0)  boldon=1;
 161                                         break;
 162
 163                 case 'e':       if (strcmp(i,"enable-checkpointing") == 0) ckpflag=1;
 164                                         break;
 165
 166                 case 'i':       if (strcmp(i,"inverse-objects") == 0)  boldon=0;
 167                                         break;
 168
 169                 case 'f':       if (strcmp(i,"female")  == 0)   sex=0; /* male or female */
 170                                         break;
 171
 172                 case 'm':       if (strcmp(i,"monster:")== 0)   /* name favorite monster */
 173                                                 {
 174                                                 if ((i=lgetw())==0) break;
 175                                                 if (strlen(i)>=MAXMNAME) i[MAXMNAME-1]=0;
 176                                                 strcpy(usermonster[(int)usermpoint],i);
 177                                                 if (usermpoint >= MAXUM) break; /* defined all of em */
 178                                                 if (isalpha(j=usermonster[(int)usermpoint][0]))
 179                                                         {
 180                                                         for (k=1; k<MAXMONST+8; k++) /* find monster */
 181                                                           if (monstnamelist[k] == j)
 182                                                                 {
 183                                                                 monster[k].name = &usermonster[(int)usermpoint++][0];
 184                                                                 break;
 185                                                                 }
 186                                                         }
 187                                                 }
 188                                         else if (strcmp(i,"male") == 0) sex=1;
 189                                         break;
 190
 191                 case 'n':       if (strcmp(i,"name:") == 0) /* defining players name */
 192                                                 {
 193                                                 if ((i=lgetw())==0) break;
 194                                                 if (strlen(i)>=LOGNAMESIZE) i[LOGNAMESIZE-1]=0;
 195                                                 strcpy(logname,i); flag=0;
 196                                                 }
 197                                         else if (strcmp(i,"no-introduction") == 0) nowelcome=1;
 198                                         else if (strcmp(i,"no-beep") == 0) nobeep=1;
 199                                         break;
 200
 201                 case 'p':       if (strcmp(i,"process-name:")== 0)
 202                                                 {
 203                                                 if ((i=lgetw())==0) break;
 204                                                 if (strlen(i)>=PSNAMESIZE) i[PSNAMESIZE-1]=0;
 205                                                 strcpy(psname,i);
 206                                                 }
 207                                         else if (strcmp(i,"play-day-play") == 0)  dayplay=1;
 208                                         break;
 209
 210                 case 's':       if (strcmp(i,"savefile:") == 0) /* defining savefilename */
 211                                                 {
 212                                                 if ((i=lgetw())==0) break;
 213                                                 strcpy(savefilename,i); flag=0;
 214                                                 }
 215                                         break;
 216                 };
 217           } while(*i);
 218         if (flag)  strcpy(logname,loginname);
 219         }
 220