Add uchar.h accordingly.
For the c32 functions, use the internal functions wirtomb and mbrtowi
as base, and convert wirtomb and mbrtowi to inline functions calling
the c32 functions.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Deviation from standard: If the input is broken, the output will be
broken. I. e., we just copy the current byte over into the wint_t
destination and try to pick up on the next byte. This is in line
with the way fnmatch works.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
g_Ctoc, converting the UTF-32 filenames to multibyte, still
used UTF-16 to multibyte conversion. Introduce a wirtomb
helper and fix that.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
wcintowcs: convert UTF-16 to UTF-32 string
wcilen: return number of characters in a UTF-32 string
wcincmp: compare two fixed-size UTF-32 strings
Used in followup patches introducing collating symbols
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Given how UTF-16 isn't capable to hold all Unicode chars in a single
wchar_t, we need a function returning a wint_t value representing
a UTF-32 value for comparison functions. Fortunately the important
wide character functions like towupper/towlower, isw<class>, iswctype,
etc, already take wint_t values and newlib handles them as UTF-32.
If only we had switched wchar_t to 32 bit way back when... sigh.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Corinna Vinschen