2 * libdpkg - Debian packaging suite library routines
3 * myopt.c - my very own option parsing
5 * Copyright (C) 1994,1995 Ian Jackson <ian@davenant.greenend.org.uk>
7 * This is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 3,
10 * or (at your option) any later version.
12 * This is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public
18 * License along with this file; if not, consult the Free Software
19 * Foundation's website at www.fsf.org, or the GNU Project website at
30 void badusage(const char *fmt, ...) {
34 vfprintf(stderr,fmt,al);
41 void myopt(const char *const **argvp, const struct cmdinfo *cmdinfos) {
42 const struct cmdinfo *cip;
43 const char *p, *value;
47 while ((p= **argvp) && *p == '-') {
49 if (!strcmp(p,"--")) break;
53 cip->olong || cip->oshort;
55 if (!cip->olong) continue;
56 if (!strcmp(p,cip->olong)) break;
57 l= strlen(cip->olong);
58 if (!strncmp(p,cip->olong,l) &&
59 (p[l]== ((cip->takesvalue==2) ? '-' : '='))) { value=p+l+1; break; }
61 if (!cip->olong) badusage("unknown option --%s",p);
62 if (cip->takesvalue) {
65 if (!value) badusage("--%s option takes a value",cip->olong);
67 if (cip->call) cip->call(cip,value);
68 else *cip->sassignto= value;
70 if (value) badusage("--%s option does not take a value",cip->olong);
71 if (cip->call) cip->call(cip,0);
72 else *cip->iassignto= cip->arg;
76 for (cip= cmdinfos; (cip->olong || cip->oshort) && *p != cip->oshort; cip++);
77 if (!cip->oshort) badusage("unknown option -%c",*p);
79 if (cip->takesvalue) {
82 if (!value) badusage("-%c option takes a value",cip->oshort);
85 if (*value == '=') value++;
87 if (cip->call) cip->call(cip,value);
88 else *cip->sassignto= value;
90 if (*p == '=') badusage("-%c option does not take a value",cip->oshort);
91 if (cip->call) cip->call(cip,0);
92 else *cip->iassignto= cip->arg;