2 * libdpkg - Debian packaging suite library routines
3 * myopt.c - my very own option parsing
5 * Copyright (C) 1994,1995 Ian Jackson <iwj10@cus.cam.ac.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 2,
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, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 void badusage(const char *fmt, ...) {
33 vfprintf(stderr,fmt,al);
40 void myopt(const char *const **argvp, const struct cmdinfo *cmdinfos) {
41 const struct cmdinfo *cip;
42 const char *p, *value;
46 while ((p= **argvp) && *p == '-') {
48 if (!strcmp(p,"--")) break;
52 cip->olong || cip->oshort;
54 if (!cip->olong) continue;
55 if (!strcmp(p,cip->olong)) break;
56 l= strlen(cip->olong);
57 if (!strncmp(p,cip->olong,l) &&
58 (p[l]== ((cip->takesvalue==2) ? '-' : '='))) { value=p+l+1; break; }
60 if (!cip->olong) badusage("unknown option --%s",p);
61 if (cip->takesvalue) {
64 if (!value) badusage("--%s option takes a value",cip->olong);
66 if (cip->call) cip->call(cip,value);
67 else *cip->sassignto= value;
69 if (value) badusage("--%s option does not take a value",cip->olong);
70 if (cip->call) cip->call(cip,0);
71 else *cip->iassignto= cip->arg;
75 for (cip= cmdinfos; (cip->olong || cip->oshort) && *p != cip->oshort; cip++);
76 if (!cip->oshort) badusage("unknown option -%c",*p);
78 if (cip->takesvalue) {
81 if (!value) badusage("-%c option takes a value",cip->oshort);
84 if (*value == '=') value++;
86 if (cip->call) cip->call(cip,value);
87 else *cip->sassignto= value;
89 if (*p == '=') badusage("-%c option does not take a value",cip->oshort);
90 if (cip->call) cip->call(cip,0);
91 else *cip->iassignto= cip->arg;