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/*
** This file is in the public domain, so clarified as of
** Feb 14, 2003 by Arthur David Olson (arthur_david_olson@nih.gov).
*/
#if defined(LIBC_SCCS) && !defined(lint) && !defined(NOID)
static char elsieid[] = "@(#)scheck.c 8.16";
static char rcsid[] = "$OpenBSD: scheck.c,v 1.7 2005/07/05 13:40:51 millert Exp $";
#endif /* LIBC_SCCS and not lint */
/*LINTLIBRARY*/
#include "private.h"
char *
scheck(string, format)
const char * const string;
char * const format;
{
register char * fbuf;
register const char * fp;
register char * tp;
register int c;
register char * result;
char dummy;
static char nada;
result = &nada;
if (string == NULL || format == NULL)
return result;
fbuf = imalloc((int) (2 * strlen(format) + 4));
if (fbuf == NULL)
return result;
fp = format;
tp = fbuf;
while ((*tp++ = c = *fp++) != '\0') {
if (c != '%')
continue;
if (*fp == '%') {
*tp++ = *fp++;
continue;
}
*tp++ = '*';
if (*fp == '*')
++fp;
while (is_digit(*fp))
*tp++ = *fp++;
if (*fp == 'l' || *fp == 'h')
*tp++ = *fp++;
else if (*fp == '[')
do *tp++ = *fp++;
while (*fp != '\0' && *fp != ']');
if ((*tp++ = *fp++) == '\0')
break;
}
*(tp - 1) = '%';
*tp++ = 'c';
*tp = '\0';
if (sscanf(string, fbuf, &dummy) != 1)
result = (char *) format;
ifree(fbuf);
return result;
}
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