libc/locale: Nix needless size_t casts.

No functional change intended. No binary change to aarch64 libc.

Prompted by code inspection around PR lib/58319.

Remove most LC_CTYPE specific parts of locale.cache.

Provide explicit LC_C_LOCALE accessor and drop the various NULL checks.
Provide LC_GLOBAL_LOCALE in a way that works with all locale functions.
Merge constant data used by the initial global locale a

Provide explicit LC_C_LOCALE accessor and drop the various NULL checks.
Provide LC_GLOBAL_LOCALE in a way that works with all locale functions.
Merge constant data used by the initial global locale and the C locale.
Drop function call layer for _current_locale() and directly return the
locale reference, not a pointer to it. Use protected access for global
variables, so that libc references can avoid the GOT overhead.

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Add isalpha_l and friends.

Extend ctype classification table to 16bit. Based on patch by
Takehiko Nozaki, with changes to compile fail when using the old names
and to exploit __BUILD_LEGACY

Prefix ctype bitmask macros with _CTYPE

more split ctype.h -> sys/ctype_inline.h, sys/ctype_bits.h

make _locale_impl_t.cache as pointer to maintain easily binary compatibility in future.
no ABI change was made.

merge christos-time_t

Fixes PR lib/39662, shortcomings in LC_{MONETARY,NUMERIC,TIME,MESSAGES} db format.
ok'ed by core and releng.
(thanks for agc@, snj@ and i'm sorry for long time patience).

[libc]
- localeio.[ch] and

Fixes PR lib/39662, shortcomings in LC_{MONETARY,NUMERIC,TIME,MESSAGES} db format.
ok'ed by core and releng.
(thanks for agc@, snj@ and i'm sorry for long time patience).

[libc]
- localeio.[ch] and lc*.[ch] in src/lib/libc/locale was replaced by
new locale-db implementation using citrus_db backend,
see src/lib/libc/citrus/citrus_lc_*.[ch].
- add citrus_bcs_strtou?l.c. don't use strtou?l locale implementation
internally, because they're locale-aware function.
- add some stubs for multi-locale issue, see {current,global}_locale.c.
- remove some obsolete file, setrunelocale.c, ___runetype_mb.c.
- remove __savectype() from ctypeio.[ch].

[tools]
- mklocale(1): add new option ``-t'' that generates new style
LC_{MONETARY,NUMERIC,TIME,MESSAGES} locale-db format.
- chrtbl(1): added ctypeio.[ch] for __savectype().

[locale-db]
- added en_US.US-ASCII locale.
- removed some shareable locale definition file:
en_US.US-ASCII -> en_US.ISO8859-1, en_US.UTF-8
zh_CN.eucCN -> zh_CN.GB18030
and more...see src/share/locale/*/Makefile.
- remove obsoleted locale sr_YU, added new locale sr_ME, sr_RS.
- change locale name ja_JP.ISO2022-JP* -> ja_JP.ISO-2022-JP*
for X11's locale.alias file alignments.
- fix regression test, wrong wcs?width(3), NAN/INF usage.

i tested release-build following arch:
i386, amd64, hpc{mips,arm,sh}, sparc64, vax.

citrus_lc_*.[ch] also can read old-plain-text style locale-db.
so that backward compatibility is keeped, but lc*.[ch] can't read
new citrus_db'ed locale-db and localeio.c never check sanity,
so forward compatibility is broken ;-<

old mklocale(1) doesn't know -t option, so you have to rebuild toolchain.

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Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Move the function implementations of (the non-ANSI) isascii() and toascii()
into separate modules to avoid namespace clashes.

Fix RCSID's

merge with Lite, keeping local changes. Fix up Id format, etc.

copyright foo

First pass at getting a clean compile with "gcc -Wall", mostly explictly
declaring function return values, etc.

Due to an 8-bit attribute table and 9 bits of attributes, I've had to
remove the _B attribute from the "horizontal tab" position, and change
the isblank function to explicitly test against space and

Due to an 8-bit attribute table and 9 bits of attributes, I've had to
remove the _B attribute from the "horizontal tab" position, and change
the isblank function to explicitly test against space and tab.

When I finish merging the 4.4 runes code, this table will have to grow
to 16 bit entries, as several more attributes have been introduced.
I'm making this change so existing libraries will continue working
for the next (little) while.

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Implement C version of isblank.

Separate the toupper() and tolower() functions so the tables *really* don't get
included unless you need them.

Declare rcsid strings so they are stored in text segment.

use "_to*_tab_" rather than "_to*_table_" -- table is defined as the former

Use C locale specific traslation tables for toupper and tolower.
Direct access to the tables is to be replaced by a pointer to tables for the
current locale.

Provide function versions of isascii() and toascii().

Remove patchkit lossage, and RCS frob, and make tolower() and toupper() a
little faster.

after 0.2.2 "stable" patches applied