/* tok.c Larn is copyrighted 1986 by Noah Morgan. */
/* $FreeBSD$ */
#include <sys/types.h>
#ifdef SYSV
#include <fcntl.h>
#include <termio.h>
#else SYSV
#include <sys/ioctl.h>
#endif SYSV
#include "header.h"
static char lastok=0;
int yrepcount=0,dayplay=0;
#ifndef FLUSHNO
#define FLUSHNO 5
#endif FLUSHNO
static int flushno=FLUSHNO; /* input queue flushing threshold */
#define MAXUM 52 /* maximum number of user re-named monsters */
#define MAXMNAME 40 /* max length of a monster re-name */
static char usermonster[MAXUM][MAXMNAME]; /* the user named monster name goes here */
static char usermpoint=0; /* the user monster pointer */
/*
lexical analyzer for larn
*/
yylex()
{
char cc;
int ic;
if (hit2flag) { hit2flag=0; yrepcount=0; return(' '); }
if (yrepcount>0) { --yrepcount; return(lastok); } else yrepcount=0;
if (yrepcount==0) { bottomdo(); showplayer(); } /* show where the player is */
lflush();
while (1)
{
c[BYTESIN]++;
if (ckpflag)
if ((c[BYTESIN] % 400) == 0) /* check for periodic checkpointing */
{
#ifndef DOCHECKPOINTS
savegame(ckpfile);
#else
wait(0); /* wait for other forks to finish */
if (fork() == 0) { savegame(ckpfile); exit(0); }
#endif
#ifdef TIMECHECK
if (dayplay==0)
if (playable())
{
cursor(1,19);
lprcat("\nSorry, but it is now time for work. Your game has been saved.\n"); beep();
lflush(); savegame(savefilename); wizard=nomove=1; sleep(4);
died(-257);
}
#endif TIMECHECK
}
do /* if keyboard input buffer is too big, flush some of it */
{
ioctl(0,FIONREAD,&ic);
if (ic>flushno) read(0,&cc,1);
}
while (ic>flushno);
if (read(0,&cc,1) != 1) return(lastok = -1);
if (cc == 'Y'-64) /* control Y -- shell escape */
{
resetscroll(); clear(); /* scrolling region, home, clear, no attributes */
if ((ic=fork())==0) /* child */
{
/* revoke */
setgid(getgid());
execl("/bin/csh",(char *)0); exit(1);
}
wait(0);
if (ic<0) /* error */
{
write(2,"Can't fork off a shell!\n",25); sleep(2);
}
setscroll();
return(lastok = 'L'-64); /* redisplay screen */
}
if ((cc <= '9') && (cc >= '0'))
{ yrepcount = yrepcount*10 + cc - '0'; }
else { if (yrepcount>0) --yrepcount; return(lastok = cc); }
}
}
/*
* flushall() Function to flush all type-ahead in the input buffer
*/
flushall()
{
char cc;
int ic;
for (;;) /* if keyboard input buffer is too big, flush some of it */
{
ioctl(0,FIONREAD,&ic);
if (ic<=0) return;
while (ic>0) { read(0,&cc,1); --ic; } /* gobble up the byte */
}
}
/*
function to set the desired hardness
enter with hard= -1 for default hardness, else any desired hardness
*/
sethard(hard)
int hard;
{
int j,k,i;
j=c[HARDGAME]; hashewon();
if (restorflag==0) /* don't set c[HARDGAME] if restoring game */
{
if (hard >= 0) c[HARDGAME]= hard;
}
else c[HARDGAME]=j; /* set c[HARDGAME] to proper value if restoring game */
if (k=c[HARDGAME])
for (j=0; j<=MAXMONST+8; j++)
{
i = ((6+k)*monster[j].hitpoints+1)/6;
monster[j].hitpoints = (i<0) ? 32767 : i;
i = ((6+k)*monster[j].damage+1)/5;
monster[j].damage = (i>127) ? 127 : i;
i = (10*monster[j].gold)/(10+k);
monster[j].gold = (i>32767) ? 32767 : i;
i = monster[j].armorclass - k;
monster[j].armorclass = (i< -127) ? -127 : i;
i = (7*monster[j].experience)/(7+k) + 1;
monster[j].experience = (i<=0) ? 1 : i;
}
}
/*
function to read and process the larn options file
*/
readopts()
{
char *i;
int j,k;
int flag;
flag=1; /* set to 0 if he specifies a name for his character */
if (lopen(optsfile) < 0)
{
strcpy(logname,loginname); return; /* user name if no character name */
}
i = " ";
while (*i)
{
if ((i=(char *)lgetw()) == 0) break; /* check for EOF */
while ((*i==' ') || (*i=='\t')) i++; /* eat leading whitespace */
switch(*i)
{
case 'b': if (strcmp(i,"bold-objects") == 0) boldon=1;
break;
case 'e': if (strcmp(i,"enable-checkpointing") == 0) ckpflag=1;
break;
case 'i': if (strcmp(i,"inverse-objects") == 0) boldon=0;
break;
case 'f': if (strcmp(i,"female") == 0) sex=0; /* male or female */
break;
case 'm': if (strcmp(i,"monster:")== 0) /* name favorite monster */
{
if ((i=lgetw())==0) break;
if (strlen(i)>=MAXMNAME) i[MAXMNAME-1]=0;
strcpy(usermonster[usermpoint],i);
if (usermpoint >= MAXUM) break; /* defined all of em */
if (isalpha(j=usermonster[usermpoint][0]))
{
for (k=1; k<MAXMONST+8; k++) /* find monster */
if (monstnamelist[k] == j)
{
monster[k].name = &usermonster[usermpoint++][0];
break;
}
}
}
else if (strcmp(i,"male") == 0) sex=1;
break;
case 'n': if (strcmp(i,"name:") == 0) /* defining players name */
{
if ((i=lgetw())==0) break;
if (strlen(i)>=LOGNAMESIZE) i[LOGNAMESIZE-1]=0;
strcpy(logname,i); flag=0;
}
else if (strcmp(i,"no-introduction") == 0) nowelcome=1;
else if (strcmp(i,"no-beep") == 0) nobeep=1;
break;
case 'p': if (strcmp(i,"process-name:")== 0)
{
if ((i=lgetw())==0) break;
if (strlen(i)>=PSNAMESIZE) i[PSNAMESIZE-1]=0;
strcpy(psname,i);
}
else if (strcmp(i,"play-day-play") == 0) dayplay=1;
break;
case 's': if (strcmp(i,"savefile:") == 0) /* defining savefilename */
{
if ((i=lgetw())==0) break;
strcpy(savefilename,i); flag=0;
}
break;
};
}
if (flag) strcpy(logname,loginname);
}
