Replaced todo_skip stub with proper wcsxfrm() implementation.
The wide-char string transformation uses the current locale's
collation. Red Bear has no locale support, so the transformation
is the identity (same as C/POSIX locale). Cross-referenced with
Linux 7.1 time/wcsxfrm.c.
Behavior:
- n=0: count length of ws2 (excluding null terminator)
- n>0: copy ws2 to ws1 with null terminator, cap at n-1 chars
- Returns number of wide chars written (excluding null terminator)
Implemented wcsftime() as wide-char variant of strftime.
Cross-referenced from Linux 7.1 time/wcsftime.c.
Algorithm: convert wchar format to UTF-8 byte string (non-ASCII
chars replaced with '?'), call strftime::strftime with byte format
to format into a byte buffer, then convert each output byte to
a wchar_t in the output buffer (maxsize-1 chars + null terminator).
Also exposed time::strftime module as pub for cross-module access.
This function is used to set the orientation of a stream to either
byte-oriented or wchar-oriented.
More info on this function is here:
https://man7.org/linux/man-pages/man3/fwide.3p.html
This implementation only impmlemnts the manual switching and does
not yet guard against using a byte-oriented stream with wchar
functions and vice versa. Those step will come in additional
commits.
Signed-off-by: Wren Turkal <wt@penguintechs.org>
This patch creates wctype.h and impelementat two functions
that belong to that header file towupper and towlower. These
functions are building blocks for wcscasecmp and wcsncasecmp
which are utilized by binutils.
The implementation for towlower and towupper seams to be complex
so this implementation is mimicking that of musl libc
Red Bear OS
vasilito