implement wcsftime function

This commit is contained in:
Rich Felker 2012-02-28 15:59:01 -05:00
parent b1a8e0d454
commit 95b930ad26
1 changed files with 32 additions and 0 deletions

32
src/time/wcsftime.c Normal file
View File

@ -0,0 +1,32 @@
#include <wchar.h>
#include <time.h>
#include <string.h>
size_t wcsftime(wchar_t *wcs, size_t n, const wchar_t *f, const struct tm *tm)
{
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(out, sizeof out, in, tm);
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;
}