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#include "stdio_impl.h" #include <wchar.h> #include <errno.h> wint_t __fgetwc_unlocked(FILE *f) { mbstate_t st = { 0 }; wchar_t wc; int c; unsigned char b; size_t l; f->mode |= f->mode+1; /* 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; } } 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(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); |