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| | #include "stdio_impl.h"
#include <wchar.h>
#include <errno.h>
wint_t __fgetwc_unlocked(FILE *);
wchar_t *fgetws(wchar_t *restrict s, int n, FILE *restrict f)
{
wchar_t *p = s;
if (!n--) return s;
FLOCK(f);
wint_t c;
for (; n; n--) {
/* Setup a dummy errno so we can detect EILSEQ. This is
* the only way to catch encoding errors in the form of a
* partial character just before EOF. */
errno = EAGAIN;
c = __fgetwc_unlocked(f);
if (c == WEOF) break;
*p++ = c;
if (c == '\n') break;
}
*p = 0;
if (c == WEOF && (ferror(f) || errno==EILSEQ)) p = s;
FUNLOCK(f);
return (p == s) ? NULL : s;
}
weak_alias(fgetws, fgetws_unlocked);
|