libc: Expose some newly-standard C functions in POSIX.1-2024 mode

new gdb needs wmempcpy, give it to it.

Fix visibility of various C99 features, esp. for C++11.

Limit wcslcat, wcslcpy visibility to _NETBSD_SOURCE
wcswidth, wcwidth to POSIX.1-2001 or _NETBSD_SOURCE

Updated patch from kretschm in PR standards/39422

Import wcsnlen(3) to libc

The wcsnlen(3) function conforms to POSIX.1-2008 and is an addition to the
ISO C standard.

size_t wcsnlen(const wchar_t *s, size_t maxlen);

The wcsnlen(3) function comput

Import wcsnlen(3) to libc

The wcsnlen(3) function conforms to POSIX.1-2008 and is an addition to the
ISO C standard.

size_t wcsnlen(const wchar_t *s, size_t maxlen);

The wcsnlen(3) function computes the number of wide-characters in a wide-
-string to which s points, not including NULL terminating wide-character
code and checking no more than maxlen wide-characters. This function never
examines wide-characters beyond a wide-string of maxlen size.


This function is a safer version of wcslen(3):

size_t wcslen(const wchar_t *s);


Update STANDARDS section of wmemchr(3) describing wide-character functions.

show more ...

add open_{,w}memstream

Expose properly vfwscanf and friends for POSIX_SOURCE >= 200112L

Add nl_langinfo_l, catopen_l and wcsftime_l.

Add mbsnrtowcs and wcsnrtombs. Approved by core.

More __BEGIN_DECLS / __END_DECLS wrappers.

Add scanf_l and wscanf_l families.

Add explicit locale versions for the printf family. Replace asprintf,
snprintf and sprintf with simple wrappers around the corresponding
va_list functions to reduce code duplication.

Add wcscoll_l, wcsxfrm_l, wcsncasecmp_l, wcscasecmp_l, btowc_l,
mbrlen_l, mbsinit_l, mbsrtowcs_l, wcrtomb_l, wcsrtombs_l and wctob_l.

Add wcstof_l, wcstod_l and wcstold_l.

Add support for wcstoimax_l and friends.

Also add prototypes for wcwidth_l and wcswidth_l.

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce a

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

show more ...

1. {wctype,wctrans,mbstate}_t: switch MD to MI like other
libc implementation (such as *BSD and glibc2).

2. don't typedef void * wc{type,trans}_t, suggested by soda@-san.
it may pass through c

1. {wctype,wctrans,mbstate}_t: switch MD to MI like other
libc implementation (such as *BSD and glibc2).

2. don't typedef void * wc{type,trans}_t, suggested by soda@-san.
it may pass through compiler type check, it's harmful.
so i introduce dummy struct __tag_wc{type,trans}_t(iconv_t already does).

no ABI change was made.

show more ...

Don't define wchar_t for c++; it is native in the language. From Alexander
Nasonov

Remove clause 3 and 4 from TNF licenses

PR/34238: Aleksey Cheusov: add wcsdup, wcscasecmp and wcsncasecmp functions

add c99 wcstof(3) and wcstold(3).
requested by skrll AT netbsd DOT org, thanks.

bump libc minor 138 -> 139.

add t_putws

Wide stdio functions.

PR/29826: J. T. Conklin: Add wcsftime(3) (from FreeBSD)