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