projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
date and time created 88/10/19 15:27:18 by bostic
[unix-history] / usr / src / games / adventure / io.c
#
/* Re-coding of advent in C: file i/o and user i/o */
static char sccsid[] = " io.c 4.2 88/09/22 ";
#include "hdr.h"
#include <stdio.h>
getin(wrd1,wrd2) /* get command from user */
char **wrd1,**wrd2; /* no prompt, usually */
{ register char *s;
static char wd1buf[MAXSTR],wd2buf[MAXSTR];
int first, numch;
*wrd1=wd1buf; /* return ptr to internal string*/
*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;
}
default:
if (++numch>=MAXSTR) /* string too long */
{ printf("Give me a break!!\n");
wd1buf[0]=wd2buf[0]=0;
FLUSHLINE;
return;
}
s++;
}
}
}
confirm(mesg) /* confirm irreversible action */
char *mesg;
{ register int result;
printf("%s",mesg); /* tell him what he did */
if (getchar()=='y') /* was his first letter a 'y'? */
result=1;
else result=0;
FLUSHLINE;
return(result);
}
yes(x,y,z) /* confirm with rspeak */
int x,y,z;
{ register int result;
register char ch;
for (;;)
{ rspeak(x); /* tell him what we want*/
if ((ch=getchar())=='y')
result=TRUE;
else if (ch=='n') result=FALSE;
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);
}
yesm(x,y,z) /* confirm with mspeak */
int x,y,z;
{ register int result;
register char ch;
for (;;)
{ mspeak(x); /* tell him what we want*/
if ((ch=getchar())=='y')
result=TRUE;
else if (ch=='n') result=FALSE;
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;
int adrptr; /* current seek adr ptr */
int outsw = 0; /* putting stuff to data file? */
char iotape[] = "Ax3F'tt$8hqer*hnGKrX:!l";
char *tape = iotape; /* pointer to encryption tape */
next() /* next char frm file, bump adr */
{ register char ch,t;
adrptr++; /* seek address in file */
ch=getc(inbuf);
if (outsw) /* putting data in tmp file */
{ if (*tape==0) tape=iotape; /* rewind encryption tape */
putc(ch ^ *tape++,outbuf); /* encrypt & output char */
}
return(ch);
}
char breakch; /* tell which char ended rnum */
rdata() /* read all data from orig file */
{ register int sect;
register char ch;
if ((inbuf=fopen(DATFILE,"r"))==NULL) /* all the data lives in here */
{ printf("Cannot open data file %s\n",DATFILE);
exit(0);
}
if ((outbuf=fopen(TMPFILE,"w"))==NULL) /* the text lines will go here */
{ printf("Cannot create output file %s\n",TMPFILE);
exit(0);
}
setup=clsses=1;
for (;;) /* read data sections */
{ sect=next()-'0'; /* 1st digit of section number */
printf("Section %c",sect+'0');
if ((ch=next())!=LF) /* is there a second digit? */
{ FLUSHLF;
putchar(ch);
sect=10*sect+ch-'0';
}
putchar('\n');
switch(sect)
{ case 0: /* finished reading database */
fclose(inbuf);
fclose(outbuf);
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];
rnum() /* read initial location num */
{ register 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 */
}
int seekhere = 1; /* initial seek for output file */
rdesc(sect) /* read description-format msgs */
int sect;
{ register char *s,*t;
register int locc;
int seekstart, maystart, adrstart;
char *entry;
outsw=1; /* these msgs go into tmp file */
if (sect==1) putc('X',outbuf); /* so seekadr > 0 */
adrptr=0;
for (oldloc= -1, seekstart=seekhere;;)
{ maystart=adrptr; /* 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)
{ printf("Too many random msgs\n");
exit(0);
}
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)
{ printf("Too many magic msgs\n");
exit(0);
}
mtext[oldloc].seekadr=seekhere;
mtext[oldloc].txtlen=maystart-seekstart;
break;
default:
printf("rdesc called with bad section\n");
exit(0);
}
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 */
}
}
rtrav() /* read travel table */
{ register int locc;
register struct travlist *t;
register char *s;
char buf[12];
int len,m,n,entries;
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));
/* 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));
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); */
}
}
}
twrite(loq) /* travel options from this loc */
int loq;
{ register 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);
}
}
rvoc()
{ register char *s; /* read the vocabulary */
register 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(); */
}
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;
}
}
rdflt() /* default verb messages */
{ for (;;)
{ if ((verb=rnum())<0) break;
actspk[verb]=rnum();
}
}
rliq() /* liquid assets &c: cond bits */
{ register 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;
}
}
}
rhints()
{ register 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;
}
}
rspeak(msg)
int msg;
{ if (msg!=0) speak(&rtext[msg]);
}
mspeak(msg)
int msg;
{ if (msg!=0) speak(&mtext[msg]);
}
doseek(offset) /* do 2 seeks to get to right place in the file */
unsigned offset;
{
extern unsigned filesize;
lseek(datfd,(long)offset+(long)filesize, 0);
#ifdef notdef
blockadr=chadr=0;
if (offset<0) /* right place is offset+filesize*/
{ blockadr += 64; /* take off 32768 bytes */
chadr += offset+32768; /* & make them into 64 blocks */
}
else chadr += offset;
if (filesize<0) /* data starts after file */
{ blockadr += 64; /* which may also be large */
chadr += filesize+32768;
}
else chadr += filesize;
if (chadr<0) /* and the leftovers may be lge */
{ blockadr += 64;
chadr += 32768;
}
seek(datfd,blockadr,3); /* get within 32767 */
seek(datfd,chadr,1); /* then the rest of the way */
#endif
}
speak(msg) /* read, decrypt, and print a message (not ptext) */
struct text *msg;/* msg is a pointer to seek address and length of mess */
{ register char *s,nonfirst;
register char *tbuf;
doseek(msg->seekadr);
if ((tbuf=(char *) malloc(msg->txtlen+1)) == 0) bug(109);
read(datfd,tbuf,msg->txtlen);
s=tbuf;
nonfirst=0;
while (s-tbuf<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 */
}
free(tbuf);
}
pspeak(msg,skip) /* read, decrypt an print a ptext message */
int msg; /* 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*/
{ register char *s,nonfirst;
register char *tbuf;
char *numst;
int lstr;
doseek(ptext[msg].seekadr);
if ((tbuf=(char *) malloc((lstr=ptext[msg].txtlen)+1)) == 0) bug(108);
read(datfd,tbuf,lstr);
s=tbuf;
nonfirst=0;
while (s-tbuf<lstr) /* read a line at a time */
{ tape=iotape; /* restart decryption tape */
for (numst=s; (*s^= *tape++)!=TAB; s++); /* get number */
*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);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.