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/* $NetBSD: tok.c,v 1.11 2012/06/19 05:30:44 dholland Exp $ */
/* tok.c Larn is copyrighted 1986 by Noah Morgan. */
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: tok.c,v 1.11 2012/06/19 05:30:44 dholland Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <string.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <ctype.h>
#include "header.h"
#include "extern.h"
/* Keystrokes (roughly) between checkpoints */
#define CHECKPOINT_INTERVAL 400
static char lastok = 0;
int yrepcount = 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 u_char usermpoint = 0; /* the user monster pointer */
/*
lexical analyzer for larn
*/
int
yylex(void)
{
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]++;
/* check for periodic checkpointing */
if (ckpflag)
if ((c[BYTESIN] % CHECKPOINT_INTERVAL) == 0) {
#ifndef DOCHECKPOINTS
savegame(ckpfile);
#else
wait(0); /* wait for other forks to
* finish */
if (fork() == 0) {
savegame(ckpfile);
exit();
}
#endif
}
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 */
execl("/bin/csh", "/bin/csh", NULL);
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
*/
void
flushall(void)
{
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
*/
void
sethard(int hard)
{
int j, k, i;
struct monst *mp;
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]) != 0)
for (j = 0; j <= MAXMONST + 8; j++) {
mp = &monster[j];
i = ((6 + k) * mp->hitpoints + 1) / 6;
mp->hitpoints = (i < 0) ? 32767 : i;
i = ((6 + k) * mp->damage + 1) / 5;
mp->damage = (i > 127) ? 127 : i;
i = (10 * mp->gold) / (10 + k);
mp->gold = (i > 32767) ? 32767 : i;
i = mp->armorclass - k;
mp->armorclass = (i < -127) ? -127 : i;
i = (7 * mp->experience) / (7 + k) + 1;
mp->experience = (i <= 0) ? 1 : i;
}
}
/*
function to read and process the larn options file
*/
void
readopts(void)
{
const char *i;
int j, k;
int flag;
flag = 1; /* set to 0 if a name is specified */
if (lopen(optsfile) < 0) {
strcpy(logname, loginname);
return; /* user name if no character name */
}
i = " ";
while (*i) {
if ((i = lgetw()) == NULL)
break; /* check for EOF */
while ((*i == ' ') || (*i == '\t'))
i++; /* eat leading whitespace */
if (strcmp(i, "bold-objects") == 0)
boldon = 1;
else if (strcmp(i, "enable-checkpointing") == 0)
ckpflag = 1;
else if (strcmp(i, "inverse-objects") == 0)
boldon = 0;
else if (strcmp(i, "female") == 0)
sex = 0; /* male or female */
else if (strcmp(i, "monster:") == 0) { /* name favorite monster */
if ((i = lgetw()) == 0)
break;
strlcpy(usermonster[usermpoint], i, MAXMNAME);
if (usermpoint >= MAXUM)
continue; /* 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;
else if (strcmp(i, "name:") == 0) { /* defining players name */
if ((i = lgetw()) == 0)
break;
strlcpy(logname, i, LOGNAMESIZE);
flag = 0;
} else if (strcmp(i, "no-introduction") == 0)
nowelcome = 1;
else if (strcmp(i, "no-beep") == 0)
nobeep = 1;
else if (strcmp(i, "process-name:") == 0) {
if ((i = lgetw()) == 0)
break;
strlcpy(psname, i, PSNAMESIZE);
} else if (strcmp(i, "play-day-play") == 0) {
/* bypass time restrictions: ignored */
} else if (strcmp(i, "savefile:") == 0) { /* defining savefilename */
if ((i = lgetw()) == 0)
break;
strcpy(savefilename, i);
flag = 0;
}
}
if (flag)
strcpy(logname, loginname);
}
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