diff options
Diffstat (limited to 'lib/c32to-impl.h')
| -rw-r--r-- | lib/c32to-impl.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/lib/c32to-impl.h b/lib/c32to-impl.h index e94fa7dc..2299ab75 100644 --- a/lib/c32to-impl.h +++ b/lib/c32to-impl.h @@ -53,7 +53,7 @@ FUNC (wint_t wc) else return wc; -#elif HAVE_WORKING_MBRTOC32 /* glibc, Android */ +#elif HAVE_WORKING_MBRTOC32 && HAVE_WORKING_C32RTOMB /* glibc, Android */ /* mbrtoc32() is essentially defined by the system libc. */ # if _GL_WCHAR_T_IS_UCS4 @@ -73,11 +73,22 @@ FUNC (wint_t wc) /* The wchar_t encoding is UTF-16. The char32_t encoding is UCS-4. */ +# if defined _WIN32 && !defined __CYGWIN__ + /* On native Windows, in the UTF-8 locale, towlower and towupper are + lacking (at least) the mappings for ISO-8859-1 characters, such as + 0x00C9 <-> 0x00E9. Since it is expensive to test whether the locale + encoding is UTF-8, ignore the system's WCHAR_FUNC altogether. */ + if (wc != WEOF) + return UCS_FUNC (wc); + else + return wc; +# else if (wc == WEOF || wc == (wchar_t) wc) /* wc is in the range for the tow* functions. */ return WCHAR_FUNC (wc); else return UCS_FUNC (wc); +# endif #else /* macOS, FreeBSD, NetBSD, OpenBSD, HP-UX, Solaris, Minix, Android */ /* char32_t and wchar_t are equivalent. */ |