glibc/timezone/scheck.c
Joseph Myers 85bff96ad6 Update timezone code from tzcode 2013i.
Now we have Paul's support for version-3 tz files checked in, this
patch updates all the code we take (unmodified) from tzcode to version
2013i (which includes the support for generating version-3 tz files
where necessary).

Tested x86_64.

	* timezone/checktab.awk: Update from tzcode 2013i.
	* timezone/private.h: Likewise.
	* timezone/scheck.c: Likewise.
	* timezone/tzfile.h: Likewise.
	* timezone/tzselect.ksh: Likewise.
	* timezone/zdump.c: Likewise.
	* timezone/zic.c: Likewise.
2013-12-20 13:10:07 +00:00

65 lines
1.2 KiB
C

/*
** This file is in the public domain, so clarified as of
** 2006-07-17 by Arthur David Olson.
*/
/*LINTLIBRARY*/
#include "private.h"
const char *
scheck(const char *const string, const char *const format)
{
register char * fbuf;
register const char * fp;
register char * tp;
register int c;
register const char * result;
char dummy;
result = "";
if (string == NULL || format == NULL)
return result;
fbuf = malloc(2 * strlen(format) + 4);
if (fbuf == NULL)
return result;
fp = format;
tp = fbuf;
/*
** Copy directives, suppressing each conversion that is not
** already suppressed. Scansets containing '%' are not
** supported; e.g., the conversion specification "%[%]" is not
** supported. Also, multibyte characters containing a
** non-leading '%' byte are not supported.
*/
while ((*tp++ = c = *fp++) != '\0') {
if (c != '%')
continue;
if (is_digit(*fp)) {
char const *f = fp;
char *t = tp;
do {
*t++ = c = *f++;
} while (is_digit(c));
if (c == '$') {
fp = f;
tp = t;
}
}
*tp++ = '*';
if (*fp == '*')
++fp;
if ((*tp++ = *fp++) == '\0')
break;
}
*(tp - 1) = '%';
*tp++ = 'c';
*tp = '\0';
if (sscanf(string, fbuf, &dummy) != 1)
result = format;
free(fbuf);
return result;
}