89 lines
1.3 KiB
C
Executable File
89 lines
1.3 KiB
C
Executable File
/* Copyright (c) 1985 Ceriel J.H. Jacobs */
|
|
|
|
# ifndef lint
|
|
static char rcsid[] = "$Header$";
|
|
# endif
|
|
|
|
# define _OPTIONS_
|
|
|
|
# include "in_all.h"
|
|
# include "options.h"
|
|
# include "output.h"
|
|
# include "display.h"
|
|
# include <ctype.h>
|
|
|
|
STATIC int parsopt();
|
|
char *getenv();
|
|
|
|
/*
|
|
* Read the options. Return the argv pointer following them if there were
|
|
* no errors, otherwise return 0.
|
|
*/
|
|
|
|
char **
|
|
readoptions(argv) char ** argv; {
|
|
|
|
register char ** av = argv+1;
|
|
register char *p;
|
|
|
|
if (p = getenv("YAP")) {
|
|
(VOID) parsopt(p);
|
|
}
|
|
while (*av && **av == '-') {
|
|
if (parsopt(*av)) {
|
|
/*
|
|
* Error in option
|
|
*/
|
|
putline(*av);
|
|
putline(": illegal option\n");
|
|
return (char **) 0;
|
|
}
|
|
av++;
|
|
}
|
|
if (*av && **av == '+') {
|
|
/*
|
|
* Command in command line
|
|
*/
|
|
startcomm = *av + 1;
|
|
av++;
|
|
}
|
|
return av;
|
|
}
|
|
|
|
STATIC int
|
|
parsopt(s) register char *s; {
|
|
register i;
|
|
|
|
if (*s == '-') s++;
|
|
if (isdigit(*s)) {
|
|
/*
|
|
* pagesize option
|
|
*/
|
|
i = 0;
|
|
do {
|
|
i = i * 10 + *s++ - '0';
|
|
} while (isdigit(*s));
|
|
if (i < MINPAGESIZE) i = MINPAGESIZE;
|
|
pagesize = i;
|
|
}
|
|
while (*s) {
|
|
switch(*s++) {
|
|
case 'c' :
|
|
cflag++;
|
|
break;
|
|
case 'n' :
|
|
nflag++;
|
|
break;
|
|
case 'u' :
|
|
uflag++;
|
|
break;
|
|
case 'q' :
|
|
qflag++;
|
|
break;
|
|
default :
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|