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