diff options
Diffstat (limited to 'libc-top-half/musl/src/stdio/fgetwc.c')
-rw-r--r-- | libc-top-half/musl/src/stdio/fgetwc.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/stdio/fgetwc.c b/libc-top-half/musl/src/stdio/fgetwc.c new file mode 100644 index 0000000..aa10b81 --- /dev/null +++ b/libc-top-half/musl/src/stdio/fgetwc.c @@ -0,0 +1,68 @@ +#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) { + f->flags |= F_ERR; + errno = EILSEQ; + } + return WEOF; + } + l = mbrtowc(&wc, (void *)&b, 1, &st); + if (l == -1) { + if (!first) { + f->flags |= F_ERR; + 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); |