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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}