1/*
2** This file is in the public domain, so clarified as of
3** 2006-07-17 by Arthur David Olson.
4*/
5
6#ifndef lint
7#ifndef NOID
8static const char	elsieid[] = "@(#)scheck.c	8.19";
9#endif /* !defined lint */
10#endif /* !defined NOID */
11
12#ifndef lint
13static const char rcsid[] =
14  "$FreeBSD$";
15#endif /* not lint */
16
17/*LINTLIBRARY*/
18
19#include "private.h"
20
21const char *
22scheck(string, format)
23const char * const	string;
24const char * const	format;
25{
26	register char *		fbuf;
27	register const char *	fp;
28	register char *		tp;
29	register int		c;
30	register const char *	result;
31	char			dummy;
32
33	result = "";
34	if (string == NULL || format == NULL)
35		return result;
36	fbuf = imalloc((int) (2 * strlen(format) + 4));
37	if (fbuf == NULL)
38		return result;
39	fp = format;
40	tp = fbuf;
41	while ((*tp++ = c = *fp++) != '\0') {
42		if (c != '%')
43			continue;
44		if (*fp == '%') {
45			*tp++ = *fp++;
46			continue;
47		}
48		*tp++ = '*';
49		if (*fp == '*')
50			++fp;
51		while (is_digit(*fp))
52			*tp++ = *fp++;
53		if (*fp == 'l' || *fp == 'h')
54			*tp++ = *fp++;
55		else if (*fp == '[')
56			do *tp++ = *fp++;
57				while (*fp != '\0' && *fp != ']');
58		if ((*tp++ = *fp++) == '\0')
59			break;
60	}
61	*(tp - 1) = '%';
62	*tp++ = 'c';
63	*tp = '\0';
64	if (sscanf(string, fbuf, &dummy) != 1)
65		result = (char *) format;
66	ifree(fbuf);
67	return result;
68}
69