getcomment.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23/*	  All Rights Reserved  	*/
24
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27		/* SVr4.0 2.	*/
28#include "mail.h"
29/*
30 * Get comment field, if any, from line.
31 *	1 ==> found comment.
32 *	0 ==> no comment found.
33 *     -1 ==> no closing (terminating) paren found for comment.
34 */
35
36getcomment(s, q)
37register char	*s;
38register char	*q;	/* Copy comment, if found, to here */
39{
40	register char	*p, *sav_q;
41	register int	depth = 0;
42
43	if ((p = strchr(s, '(')) == (char *)NULL) {
44		/* no comment found */
45		return (0);
46	}
47	sav_q = q;
48	while (*p) {
49		*q++ = *p;
50		if (*p == ')') {
51			/* account for nested parens within comment */
52			depth--;
53			if (depth == 0) {
54				break;
55			}
56		} else if (*p == '(') {
57			depth++;
58		}
59		p++;
60	}
61	*q = '\0';
62	if (*p != ')') {
63		/* closing paren not found */
64		*sav_q = '\0';
65		return (-1);
66	}
67	/* found comment */
68	return (1);
69}
70