3 * $Id: traceopt.c,v 1.3 2004/04/08 01:36:13 mdw Exp $
5 * Parsing tracing options
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the mLib utilities library.
14 * mLib is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * mLib is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with mLib; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Header files ------------------------------------------------------*/
39 /*----- Main code ---------------------------------------------------------*/
41 /* --- @traceopt@ --- *
43 * Arguments: @const trace_opt *t@ = pointer to trace options table
44 * @const char *p@ = option string supplied by user
45 * @unsigned f@ = initial tracing flags
46 * @unsigned bad@ = forbidden tracing flags
48 * Returns: Trace flags as set by user.
50 * Use: Parses an option string from the user and sets the
51 * appropriate trace flags. If the argument is null or a single
52 * `?' character, a help message is displayed.
55 unsigned traceopt(const trace_opt *t, const char *p,
56 unsigned f, unsigned bad)
60 /* --- Dump out help text --- */
62 if (!p || !strcmp(p, "?")) {
64 puts("Trace options:");
65 for (tt = t; tt->ch; tt++) {
66 if (!(tt->f & ~bad) || !tt->help)
68 printf(" `%c': %s\n", tt->ch, tt->help);
73 /* --- Parse the string properly --- */
86 for (tt = t; tt->ch; tt++) {
97 moan("unknown trace option `%c'", *p);
107 /*----- That's all, folks -------------------------------------------------*/