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#include "stdio_impl.h"
#include "locale_impl.h"
#include <wchar.h>
#include <errno.h>
static wint_t __fgetwc_unlocked_internal(FILE *f)
{
wchar_t wc;
int c;
size_t l;
/* Convert character from buffer if possible */
if (f->rpos != f->rend) {
l = mbtowc(&wc, (void *)f->rpos, f->rend - f->rpos);
if (l+1 >= 1) {
f->rpos += l + !l; /* l==0 means 1 byte, null */
return wc;
}
}
/* Convert character byte-by-byte */
mbstate_t st = { 0 };
unsigned char b;
int first = 1;
do {
b = c = getc_unlocked(f);
if (c < 0) {
if (!first) errno = EILSEQ;
return WEOF;
}
l = mbrtowc(&wc, (void *)&b, 1, &st);
if (l == -1) {
if (!first) ungetc(b, f);
return WEOF;
}
first = 0;
} while (l == -2);
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);
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