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#include <wchar.h>
#include <time.h>
#include <string.h>
#include <locale.h>
size_t __strftime_l(char *restrict, size_t, const char *restrict, const struct tm *restrict, locale_t);
size_t __wcsftime_l(wchar_t *restrict wcs, size_t n, const wchar_t *restrict f, const struct tm *restrict tm, locale_t loc)
{
size_t k, n0=n;
char out[100], in[4];
while (*f) {
if (!n) return 0;
if (*f != '%') {
*wcs++ = *f++;
n--;
continue;
}
in[2] = in[3] = 0;
in[0] = *f++;
if (strchr("EO", (in[1]=*f++)))
in[2] = *f++;
k = __strftime_l(out, sizeof out, in, tm, loc);
if (!k) return 0;
k = mbsrtowcs(wcs, (const char *[]){out}, n, 0);
if (k==(size_t)-1) return 0;
wcs += k;
n -= k;
}
if (!n) return 0;
*wcs++ = 0;
return n0-n;
}
size_t wcsftime(wchar_t *restrict wcs, size_t n, const wchar_t *restrict f, const struct tm *restrict tm)
{
return __wcsftime_l(wcs, n, f, tm, LC_GLOBAL_LOCALE);
}
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