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bsdgames/adventure/io.c

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/* $NetBSD: io.c,v 1.15 2003/09/19 10:01:53 itojun Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* The game adventure was originally written in Fortran by Will Crowther
* and Don Woods. It was later translated to C and enhanced by Jim
* Gillogly. This code is derived from software contributed to Berkeley
* by Jim Gillogly at The Rand Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)io.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: io.c,v 1.15 2003/09/19 10:01:53 itojun Exp $");
#endif
#endif /* not lint */
/* Re-coding of advent in C: file i/o and user i/o */
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "hdr.h"
#include "extern.h"
void
getin(wrd1, wrd2) /* get command from user */
char **wrd1, **wrd2; /* no prompt, usually */
{
char *s;
static char wd1buf[MAXSTR], wd2buf[MAXSTR];
int first, numch;
*wrd1 = wd1buf; /* return ptr to internal str */
*wrd2 = wd2buf;
wd2buf[0] = 0; /* in case it isn't set here */
for (s = wd1buf, first = 1, numch = 0;;) {
if ((*s = getchar()) >= 'A' && *s <= 'Z')
*s = *s - ('A' - 'a');
/* convert to upper case */
switch (*s) { /* start reading from user */
case '\n':
*s = 0;
return;
case ' ':
if (s == wd1buf || s == wd2buf) /* initial blank */
continue;
*s = 0;
if (first) { /* finished 1st wd; start 2nd */
first = numch = 0;
s = wd2buf;
break;
} else { /* finished 2nd word */
FLUSHLINE;
*s = 0;
return;
}
case EOF:
printf("user closed input stream, quitting...\n");
exit(0);
default:
if (++numch >= MAXSTR) { /* string too long */
printf("Give me a break!!\n");
wd1buf[0] = wd2buf[0] = 0;
FLUSHLINE;
return;
}
s++;
}
}
}
int
yes(x, y, z) /* confirm with rspeak */
int x, y, z;
{
int result = TRUE; /* pacify gcc */
int ch;
for (;;) {
rspeak(x); /* tell him what we want */
if ((ch = getchar()) == 'y')
result = TRUE;
else if (ch == 'n')
result = FALSE;
else if (ch == EOF) {
printf("user closed input stream, quitting...\n");
exit(0);
}
FLUSHLINE;
if (ch == 'y' || ch == 'n')
break;
printf("Please answer the question.\n");
}
if (result == TRUE)
rspeak(y);
if (result == FALSE)
rspeak(z);
return (result);
}
int
yesm(x, y, z) /* confirm with mspeak */
int x, y, z;
{
int result = TRUE; /* pacify gcc */
int ch;
for (;;) {
mspeak(x); /* tell him what we want */
if ((ch = getchar()) == 'y')
result = TRUE;
else if (ch == 'n')
result = FALSE;
else if (ch == EOF) {
printf("user closed input stream, quitting...\n");
exit(0);
}
FLUSHLINE;
if (ch == 'y' || ch == 'n')
break;
printf("Please answer the question.\n");
}
if (result == TRUE)
mspeak(y);
if (result == FALSE)
mspeak(z);
return (result);
}
/* FILE *inbuf,*outbuf; */
char *inptr; /* Pointer into virtual disk */
int outsw = 0; /* putting stuff to data file? */
const char iotape[] = "Ax3F'\003tt$8h\315qer*h\017nGKrX\207:!l";
const char *tape = iotape; /* pointer to encryption tape */
int
next()
{ /* next virtual char, bump adr */
int ch;
ch = (*inptr ^ random()) & 0xFF; /* Decrypt input data */
if (outsw) { /* putting data in tmp file */
if (*tape == 0)
tape = iotape; /* rewind encryption tape */
*inptr = ch ^ *tape++; /* re-encrypt and replace value */
}
inptr++;
return (ch);
}
char breakch; /* tell which char ended rnum */
void
rdata()
{ /* "read" data from virtual file */
int sect;
char ch;
inptr = data_file; /* Pointer to virtual data file */
srandom(SEED); /* which is lightly encrypted. */
clsses = 1;
for (;;) { /* read data sections */
sect = next() - '0'; /* 1st digit of section number */
#ifdef VERBOSE
printf("Section %c", sect + '0');
#endif
if ((ch = next()) != LF) { /* is there a second digit? */
FLUSHLF;
#ifdef VERBOSE
putchar(ch);
#endif
sect = 10 * sect + ch - '0';
}
#ifdef VERBOSE
putchar('\n');
#endif
switch (sect) {
case 0: /* finished reading database */
return;
case 1: /* long form descriptions */
rdesc(1);
break;
case 2: /* short form descriptions */
rdesc(2);
break;
case 3: /* travel table */
rtrav();
break;
case 4: /* vocabulary */
rvoc();
break;
case 5: /* object descriptions */
rdesc(5);
break;
case 6: /* arbitrary messages */
rdesc(6);
break;
case 7: /* object locations */
rlocs();
break;
case 8: /* action defaults */
rdflt();
break;
case 9: /* liquid assets */
rliq();
break;
case 10: /* class messages */
rdesc(10);
break;
case 11: /* hints */
rhints();
break;
case 12: /* magic messages */
rdesc(12);
break;
default:
printf("Invalid data section number: %d\n", sect);
for (;;)
putchar(next());
}
if (breakch != LF) /* routines return after "-1" */
FLUSHLF;
}
}
char nbf[12];
int
rnum()
{ /* read initial location num */
char *s;
tape = iotape; /* restart encryption tape */
for (s = nbf, *s = 0;; s++)
if ((*s = next()) == TAB || *s == '\n' || *s == LF)
break;
breakch = *s; /* save char for rtrav() */
*s = 0; /* got the number as ascii */
if (nbf[0] == '-')
return (-1); /* end of data */
return (atoi(nbf)); /* convert it to integer */
}
char *seekhere;
void
rdesc(sect) /* read description-format msgs */
int sect;
{
int locc;
char *seekstart, *maystart;
seekhere = inptr; /* Where are we in virtual file? */
outsw = 1; /* these msgs go into tmp file */
for (oldloc = -1, seekstart = seekhere;;) {
maystart = inptr; /* maybe starting new entry */
if ((locc = rnum()) != oldloc && oldloc >= 0 /* finished msg */
&& !(sect == 5 && (locc == 0 || locc >= 100))) { /* unless sect 5 */
switch (sect) { /* now put it into right table */
case 1:/* long descriptions */
ltext[oldloc].seekadr = seekhere;
ltext[oldloc].txtlen = maystart - seekstart;
break;
case 2:/* short descriptions */
stext[oldloc].seekadr = seekhere;
stext[oldloc].txtlen = maystart - seekstart;
break;
case 5:/* object descriptions */
ptext[oldloc].seekadr = seekhere;
ptext[oldloc].txtlen = maystart - seekstart;
break;
case 6:/* random messages */
if (oldloc >= RTXSIZ)
errx(1,"Too many random msgs");
rtext[oldloc].seekadr = seekhere;
rtext[oldloc].txtlen = maystart - seekstart;
break;
case 10: /* class messages */
ctext[clsses].seekadr = seekhere;
ctext[clsses].txtlen = maystart - seekstart;
cval[clsses++] = oldloc;
break;
case 12: /* magic messages */
if (oldloc >= MAGSIZ)
errx(1,"Too many magic msgs");
mtext[oldloc].seekadr = seekhere;
mtext[oldloc].txtlen = maystart - seekstart;
break;
default:
errx(1,"rdesc called with bad section");
}
seekhere += maystart - seekstart;
}
if (locc < 0) {
outsw = 0; /* turn off output */
seekhere += 3; /* -1<delimiter> */
return;
}
if (sect != 5 || (locc > 0 && locc < 100)) {
if (oldloc != locc) /* starting a new message */
seekstart = maystart;
oldloc = locc;
}
FLUSHLF; /* scan the line */
}
}
void
rtrav()
{ /* read travel table */
int locc;
struct travlist *t = NULL;
char *s;
char buf[12];
int len, m, n, entries = 0;
for (oldloc = -1;;) { /* get another line */
if ((locc = rnum()) != oldloc && oldloc >= 0) { /* end of entry */
t->next = 0; /* terminate the old entry */
/* printf("%d:%d entries\n",oldloc,entries); */
/* twrite(oldloc); */
}
if (locc == -1)
return;
if (locc != oldloc) { /* getting a new entry */
t = travel[locc] = (struct travlist *) malloc(sizeof(struct travlist));
if ( t == NULL)
err(1, NULL);
/* printf("New travel list for %d\n",locc); */
entries = 0;
oldloc = locc;
}
for (s = buf;; s++) /* get the newloc number /ASCII */
if ((*s = next()) == TAB || *s == LF)
break;
*s = 0;
len = length(buf) - 1; /* quad long number handling */
/* printf("Newloc: %s (%d chars)\n",buf,len); */
if (len < 4) { /* no "m" conditions */
m = 0;
n = atoi(buf); /* newloc mod 1000 = newloc */
} else { /* a long integer */
n = atoi(buf + len - 3);
buf[len - 3] = 0; /* terminate newloc/1000 */
m = atoi(buf);
}
while (breakch != LF) { /* only do one line at a time */
if (entries++) {
t = t->next = (struct travlist *) malloc(sizeof(struct travlist));
if (t == NULL)
err(1, NULL);
}
t->tverb = rnum(); /* get verb from the file */
t->tloc = n; /* table entry mod 1000 */
t->conditions = m; /* table entry / 1000 */
/* printf("entry %d for %d\n",entries,locc); */
}
}
}
#ifdef DEBUG
void
twrite(loq) /* travel options from this loc */
int loq;
{
struct travlist *t;
printf("If");
speak(&ltext[loq]);
printf("then\n");
for (t = travel[loq]; t != 0; t = t->next) {
printf("verb %d takes you to ", t->tverb);
if (t->tloc <= 300)
speak(&ltext[t->tloc]);
else
if (t->tloc <= 500)
printf("special code %d\n", t->tloc - 300);
else
rspeak(t->tloc - 500);
printf("under conditions %d\n", t->conditions);
}
}
#endif /* DEBUG */
void
rvoc()
{
char *s; /* read the vocabulary */
int index;
char buf[6];
for (;;) {
index = rnum();
if (index < 0)
break;
for (s = buf, *s = 0;; s++) /* get the word */
if ((*s = next()) == TAB || *s == '\n' || *s == LF
|| *s == ' ')
break;
/* terminate word with newline, LF, tab, blank */
if (*s != '\n' && *s != LF)
FLUSHLF;/* can be comments */
*s = 0;
/* printf("\"%s\"=%d\n",buf,index); */
vocab(buf, -2, index);
}
/* prht(); */
}
void
rlocs()
{ /* initial object locations */
for (;;) {
if ((obj = rnum()) < 0)
break;
plac[obj] = rnum(); /* initial loc for this obj */
if (breakch == TAB) /* there's another entry */
fixd[obj] = rnum();
else
fixd[obj] = 0;
}
}
void
rdflt()
{ /* default verb messages */
for (;;) {
if ((verb = rnum()) < 0)
break;
actspk[verb] = rnum();
}
}
void
rliq()
{ /* liquid assets &c: cond bits */
int bitnum;
for (;;) { /* read new bit list */
if ((bitnum = rnum()) < 0)
break;
for (;;) { /* read locs for bits */
cond[rnum()] |= setbit[bitnum];
if (breakch == LF)
break;
}
}
}
void
rhints()
{
int hintnum, i;
hntmax = 0;
for (;;) {
if ((hintnum = rnum()) < 0)
break;
for (i = 1; i < 5; i++)
hints[hintnum][i] = rnum();
if (hintnum > hntmax)
hntmax = hintnum;
}
}
void
rspeak(msg)
int msg;
{
if (msg != 0)
speak(&rtext[msg]);
}
void
mspeak(msg)
int msg;
{
if (msg != 0)
speak(&mtext[msg]);
}
void
speak(msg) /* read, decrypt, and print a message (not
* ptext) */
const struct text *msg; /* msg is a pointer to seek address and length
* of mess */
{
char *s, nonfirst;
s = msg->seekadr;
nonfirst = 0;
while (s - msg->seekadr < msg->txtlen) { /* read a line at a time */
tape = iotape; /* restart decryption tape */
while ((*s++ ^ *tape++) != TAB); /* read past loc num */
/* assume tape is longer than location number */
/* plus the lookahead put together */
if ((*s ^ *tape) == '>' &&
(*(s + 1) ^ *(tape + 1)) == '$' &&
(*(s + 2) ^ *(tape + 2)) == '<')
break;
if (blklin && !nonfirst++)
putchar('\n');
do {
if (*tape == 0)
tape = iotape; /* rewind decryp tape */
putchar(*s ^ *tape);
} while ((*s++ ^ *tape++) != LF); /* better end with LF */
}
}
void
pspeak(m, skip) /* read, decrypt an print a ptext message */
int m; /* msg is the number of all the p msgs for
* this place */
int skip; /* assumes object 1 doesn't have prop 1, obj 2
* no prop 2 &c */
{
char *s, nonfirst;
char *numst, save;
struct text *msg;
char *tbuf;
msg = &ptext[m];
if ((tbuf = (char *) malloc(msg->txtlen + 1)) == NULL)
err(1, NULL);
memcpy(tbuf, msg->seekadr, msg->txtlen + 1); /* Room to null */
s = tbuf;
nonfirst = 0;
while (s - tbuf < msg->txtlen) { /* read line at a time */
tape = iotape; /* restart decryption tape */
for (numst = s; (*s ^= *tape++) != TAB; s++); /* get number */
save = *s; /* Temporarily trash the string (cringe) */
*s++ = 0; /* decrypting number within the string */
if (atoi(numst) != 100 * skip && skip >= 0) {
while ((*s++ ^ *tape++) != LF) /* flush the line */
if (*tape == 0)
tape = iotape;
continue;
}
if ((*s ^ *tape) == '>' && (*(s + 1) ^ *(tape + 1)) == '$' &&
(*(s + 2) ^ *(tape + 2)) == '<')
break;
if (blklin && !nonfirst++)
putchar('\n');
do {
if (*tape == 0)
tape = iotape;
putchar(*s ^ *tape);
} while ((*s++ ^ *tape++) != LF); /* better end with LF */
if (skip < 0)
break;
}
free(tbuf);
}
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