blob: a00c1a862babf2b0732909b77ce765cc31655888 [file] [log] [blame]
#include "stdio_impl.h"
#include "locale_impl.h"
#include <wchar.h>
#include <errno.h>
static wint_t __fgetwc_unlocked_internal(FILE *f)
{
mbstate_t st = { 0 };
wchar_t wc;
int c;
unsigned char b;
size_t l;
/* Convert character from buffer if possible */
if (f->rpos < f->rend) {
l = mbrtowc(&wc, (void *)f->rpos, f->rend - f->rpos, &st);
if (l+2 >= 2) {
f->rpos += l + !l; /* l==0 means 1 byte, null */
return wc;
}
if (l == -1) {
f->rpos++;
return WEOF;
}
f->rpos = f->rend;
} else l = -2;
/* Convert character byte-by-byte */
while (l == -2) {
b = c = getc_unlocked(f);
if (c < 0) {
if (!mbsinit(&st)) errno = EILSEQ;
return WEOF;
}
l = mbrtowc(&wc, (void *)&b, 1, &st);
if (l == -1) return WEOF;
}
return wc;
}
wint_t __fgetwc_unlocked(FILE *f)
{
locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
if (f->mode <= 0) fwide(f, 1);
*ploc = f->locale;
wchar_t wc = __fgetwc_unlocked_internal(f);
*ploc = loc;
return wc;
}
wint_t fgetwc(FILE *f)
{
wint_t c;
FLOCK(f);
c = __fgetwc_unlocked(f);
FUNLOCK(f);
return c;
}
weak_alias(__fgetwc_unlocked, fgetwc_unlocked);
weak_alias(__fgetwc_unlocked, getwc_unlocked);