diff options
Diffstat (limited to 'wctype/wctype.h')
| -rw-r--r-- | wctype/wctype.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/wctype/wctype.h b/wctype/wctype.h index 378095bcb4..2a4caddd90 100644 --- a/wctype/wctype.h +++ b/wctype/wctype.h @@ -238,6 +238,22 @@ extern wint_t towupper (wint_t __wc) __THROW; /* Map the wide character WC using the mapping described by DESC. */ extern wint_t __towctrans (wint_t __wc, wctrans_t __desc) __THROW; +#if __GNUC__ >= 2 && defined __OPTIMIZE__ +/* The tables are always organized in a way which allows direct access + for single byte characters. */ +extern const wint_t *__ctype32_tolower; +extern const wint_t *__ctype32_toupper; + +# define towlower(wc) \ + (__builtin_constant_p (wc) && (wc) >= L'\0' && (wc) <= L'\xff' \ + ? (wint_t) __ctype32_tolower[wc] : towlower (wc)) + +# define towupper(wc) \ + (__builtin_constant_p (wc) && (wc) >= L'\0' && (wc) <= L'\xff' \ + ? (wint_t) __ctype32_toupper[wc] : towupper (wc)) + +#endif /* gcc && optimizing */ + __END_DECLS #endif /* need iswxxx. */ |