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 char	elsieid[] = "@(#)scheck.c	8.19";
9#endif /* !defined lint */
10#endif /* !defined NOID */
11
12/*LINTLIBRARY*/
13
14#include "private.h"
15
16const char *
17scheck(string, format)
18const char * const	string;
19const char * const	format;
20{
21	register char *		fbuf;
22	register const char *	fp;
23	register char *		tp;
24	register int		c;
25	register const char *	result;
26	char			dummy;
27
28	result = "";
29	if (string == NULL || format == NULL)
30		return result;
31	fbuf = imalloc((int) (2 * strlen(format) + 4));
32	if (fbuf == NULL)
33		return result;
34	fp = format;
35	tp = fbuf;
36	while ((*tp++ = c = *fp++) != '\0') {
37		if (c != '%')
38			continue;
39		if (*fp == '%') {
40			*tp++ = *fp++;
41			continue;
42		}
43		*tp++ = '*';
44		if (*fp == '*')
45			++fp;
46		while (is_digit(*fp))
47			*tp++ = *fp++;
48		if (*fp == 'l' || *fp == 'h')
49			*tp++ = *fp++;
50		else if (*fp == '[')
51			do *tp++ = *fp++;
52				while (*fp != '\0' && *fp != ']');
53		if ((*tp++ = *fp++) == '\0')
54			break;
55	}
56	*(tp - 1) = '%';
57	*tp++ = 'c';
58	*tp = '\0';
59	if (sscanf(string, fbuf, &dummy) != 1)
60		result = (char *) format;
61	ifree(fbuf);
62	return result;
63}
64