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[Perl/perl5] dd0f56: Add ability to easily add info to DEBUG output

From:
Karl Williamson via perl5-changes
Date:
March 15, 2021 21:45
Subject:
[Perl/perl5] dd0f56: Add ability to easily add info to DEBUG output
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/72e5b7-ade769@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: dd0f56e1b1addaef54897e6133fa1fe1324fa7ec
      https://github.com/Perl/perl5/commit/dd0f56e1b1addaef54897e6133fa1fe1324fa7ec
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  Add ability to easily add info to DEBUG output

This commit adds two macros that a user can define and recompile Perl to
get every active DEBUG statement to do some thing beyond what it would
normally do.

This allows someone to recompile Perl when they need to delve deeper
into fixing a bug without otherwise increasing memory use or slowing
execution.


  Commit: 2875da81f6e58f51a75c7434499b70a848991822
      https://github.com/Perl/perl5/commit/2875da81f6e58f51a75c7434499b70a848991822
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M dosish.h
    M unixish.h

  Log Message:
  -----------
  Unixish.h, doshish.h: Reorder terminations; simplify

The IO and memory terminations need to be after other things.  Add a
comment so that future maintainers won't make the mistakes I did.

Also refactor to that amiga os doesn't have a separate list to get out
of sync

I suspect that the amiga termination should be moved to earlier in
the sequence, but absent any evidence; I'm leaving it unchanged.


  Commit: a16875aef5b0bd71d1a7a34bfdefe634388918eb
      https://github.com/Perl/perl5/commit/a16875aef5b0bd71d1a7a34bfdefe634388918eb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  loc_tools.pl: Fix valid_categories calculation

This function was returning the locale categories known to the platform;
it should exclude those that perl has been compiled to ignore.


  Commit: c161e7da25c298e552ccec27542140d59521df75
      https://github.com/Perl/perl5/commit/c161e7da25c298e552ccec27542140d59521df75
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M mg.c

  Log Message:
  -----------
  XXX better message: mg.c: Silence compiler warning


  Commit: 0445359ba7756f4d7b76c5a5b71d5c8ee0d0fc8d
      https://github.com/Perl/perl5/commit/0445359ba7756f4d7b76c5a5b71d5c8ee0d0fc8d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Win32: Don't check folds validity

This code will check, when warnings are on, that the libc functions
return valid values.  But we Windows platforms will always fail because
they have multiple divergences from the Posix standard.  The macros that
implement the case changing/folding in handy.h take extra steps to bring
Windows code more into alignment with Posix.  Those are too complicated
to easily reproduce here.  The result of these checks is looked at by
our test suite, which has long, without anyone noticing, skipped
portions on Windows, even though handy.h should correct for this.  So
simply, don't do the checking under Windows, and find out what handy.h
has failed to fully correct for.


  Commit: 67d23157a2311da828d3628d1b8b875ada0b6117
      https://github.com/Perl/perl5/commit/67d23157a2311da828d3628d1b8b875ada0b6117
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M lib/locale_threads.t

  Log Message:
  -----------
  XXX locale_threads


  Commit: e2d3bbf229f48bbe00bd0d6bd01bf4ee0d833242
      https://github.com/Perl/perl5/commit/e2d3bbf229f48bbe00bd0d6bd01bf4ee0d833242
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  DEBUG_L now also looks at environment variable

Because locale initialization happens before command line processing,
one can't pass a -DL argument to enable debugging of locale
initialization.  Instead, an environment variable is read then, and is
used to enable debugging or not.  In the past, code specifically had to
test for this being set.  This commit changes that so that debugging can
automatically be enabled without having to write special code.  Future
commits will strip out those special checks.


  Commit: 7f0d161469a0f5a05f0d910151b0887d21c34132
      https://github.com/Perl/perl5/commit/7f0d161469a0f5a05f0d910151b0887d21c34132
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Replace most #ifdef DEBUGGING lines

THe previous commit enhanced the DEBUG macros so that they contain the
logic that previously had to be done with conditional compilation
statements.  Removing them makes the code easier to read.


  Commit: 3dec827d052ca62f36dadf1bb58147efdc9bec89
      https://github.com/Perl/perl5/commit/3dec827d052ca62f36dadf1bb58147efdc9bec89
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h
    M numeric.c
    M regcomp.c
    M regexec.c
    M utfebcdic.h

  Log Message:
  -----------
  Change macro names to be C standard conformant

C reserves symbols beginning with underscores for its own use.  This
commit moves the underscore so it is trailing, which is legal.  The
symbols changed here are most of the ones in handy.h that have few uses
outside it.


  Commit: a52fe7e3ee174b30a36b1327758aebb9ab44952e
      https://github.com/Perl/perl5/commit/a52fe7e3ee174b30a36b1327758aebb9ab44952e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Refactor some #ifdef's for commonality

This changes these compilation conditionals so that things in common
between Windows and other platforms are only defined once.

It changes the isWORDCHAR_LC definition for non-Windows to match that
platform, adding an UNLIKELY().


  Commit: b7db62dcdd163e39c7d35da193c4990edb50427c
      https://github.com/Perl/perl5/commit/b7db62dcdd163e39c7d35da193c4990edb50427c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: White-space, comment only


  Commit: e74b7dc78cda5692808ad93a90de37e663a5cb37
      https://github.com/Perl/perl5/commit/e74b7dc78cda5692808ad93a90de37e663a5cb37
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Remove only call to an internal macro

Replace isIDFIRST_LC  with a slightly faster implementation, in line
with what isWORDCHAR already does


  Commit: 0bcdbbdd6a6426baecaeeac1a9bc0a0b455d9e21
      https://github.com/Perl/perl5/commit/0bcdbbdd6a6426baecaeeac1a9bc0a0b455d9e21
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M charclass_invlists.h
    M handy.h
    M l1_char_class_tab.h
    M lib/unicore/uni_keywords.pl
    M perl.c
    M perl.h
    M regcomp.c
    M regcomp.h
    M regen/mk_PL_charclass.pl
    M regexec.c
    M sv.c
    M uni_keywords.h
    M utfebcdic.h

  Log Message:
  -----------
  Change macro names to be C standard conformant

C reserves symbols beginning with underscores for its own use.  This
commit moves the underscore so it is trailing, which is legal.  The
symbols changed here are many of the ones in handy.h that have
significant uses outside it.


  Commit: bfc8f66c9f0faf8ff6a94a8dac3cb60fcdbe139b
      https://github.com/Perl/perl5/commit/bfc8f66c9f0faf8ff6a94a8dac3cb60fcdbe139b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Rmv unneeded generality

The possible first character of an ID is always an alpha in the range
0-255, so there is no harm changing from the former to the latter.  And
future changes would otherwise have needed an extra parameter in a bunch
of macros.


  Commit: 01f351d8a54c8c33f67039d42610d385de19a736
      https://github.com/Perl/perl5/commit/01f351d8a54c8c33f67039d42610d385de19a736
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Don't special case isASCII_LC

This was an attempt to save instructions, but future commits will need
the generality


  Commit: 70c5893823bfc93f3d7b5ddc60a304dad2bcc560
      https://github.com/Perl/perl5/commit/70c5893823bfc93f3d7b5ddc60a304dad2bcc560
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Refactor some internal macros

This changes the parameters etc, in preparation for further changes


  Commit: 636637c2b1931e034824d4e650b8da39488e00f2
      https://github.com/Perl/perl5/commit/636637c2b1931e034824d4e650b8da39488e00f2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M globvar.sym
    M handy.h
    M inline.h
    M perl.h
    M proto.h
    M regexec.c

  Log Message:
  -----------
  regexec.c: Use function call table to streamline code

This replaces a switch() statement with a function pointer table.  But
the main reason I'm doing this is for future functionality.


  Commit: 4e19f689966d013754ae0f60b203c59aff57384c
      https://github.com/Perl/perl5/commit/4e19f689966d013754ae0f60b203c59aff57384c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Declare three static arrays to be so.


  Commit: b25e4fab92921c19108972c0fbc8bc417f73bd4b
      https://github.com/Perl/perl5/commit/b25e4fab92921c19108972c0fbc8bc417f73bd4b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Move some locale.c #defines to perl.h

This is in preparation for them to be used in macros from outside
locale.c


  Commit: 778d3623916a7edcd5393e9aa34e5bf326cc18c3
      https://github.com/Perl/perl5/commit/778d3623916a7edcd5393e9aa34e5bf326cc18c3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Mark newly moved symbols as private

The previous commit made certain symbols that previously were local to
locale.c now available everywhere.  Add a trailing underscore to their
names to mark them as private.


  Commit: d6699a9f9b158f9129b4ad2eb4e1b56bfa2ab4bb
      https://github.com/Perl/perl5/commit/d6699a9f9b158f9129b4ad2eb4e1b56bfa2ab4bb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M makedef.pl
    M perl.h

  Log Message:
  -----------
  Add USE_LOCALE_THREADS #define

This is in preparation for supporting configurations where there threads
are available, but the locale handling code should ignore that fact.

This stems from the unusual locale handling of z/OS, where any attempt
is ignored to change locales after the first thread is created.


  Commit: 77bfa832d0a75de28b94ce4da4fa374c557104ab
      https://github.com/Perl/perl5/commit/77bfa832d0a75de28b94ce4da4fa374c557104ab
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs
    M ext/POSIX/lib/POSIX.pm
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M perl.h
    M sv.c

  Log Message:
  -----------
  Regularize HAS_POSIX_2008_LOCALE, USE_POSIX_2008_LOCALE

A platform shouldn't be required to use the Posix 2008 locale handling
functions if they are present.  Perhaps they are buggy.  So, a separate
define for using them was introduced, USE_POSIX_2008_LOCALE.  But until
this commit there were cases that were looking at the underlying
availability of the functions, not if the Configuration called for their
use.


  Commit: d9dbb65a78f9eb9431d9dfe6cc18440aa727e3fc
      https://github.com/Perl/perl5/commit/d9dbb65a78f9eb9431d9dfe6cc18440aa727e3fc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Change macro name

Adopt the git convention of 'porcelain' meaning without special
handling.  This makes it clear that porcelain_setlocale  macro is the
base level.


  Commit: f10918877d1992782fa9cb2ae4fcf8afcc8b9eec
      https://github.com/Perl/perl5/commit/f10918877d1992782fa9cb2ae4fcf8afcc8b9eec
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Cast return of setlocale() to const

If they had it to do over again, the libc makers would have made the
return of this function 'const char *'.  We can cast it that way
internally to catch erroneous uses at compile time.


  Commit: 52acc71622da316a88d573410896ef70dccae37c
      https://github.com/Perl/perl5/commit/52acc71622da316a88d573410896ef70dccae37c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Create S_get_category_index()

libc locale categories, like LC_NUMERIC, are opaque integers.  This
makes it inconvenient to have table-driven code.  Instead, we have
tables that are indexed by small positive integers, which are a
compile-time mapping from the libc values.

This commit creates a run-time function to also do that mapping.  It
will first be used in the next commit.

The function does a loop through the available categories, looking for a
match.  It could be replaced by some sort of quick hash lookup, but the
largest arrays in the field have a max of 12 elements, with almost all
searches finding their quarry in the first 6.  It doesn't seem
worthwhile to me to replace a linear search of 6 elements by something
more complicated.  The design intent is this search will be used only at
the edgest of the locale-handling code; once found the index is used in
future bits of the current operation.


  Commit: 33583abb1aceeea957e6c600dc5831ca33afbd8e
      https://github.com/Perl/perl5/commit/33583abb1aceeea957e6c600dc5831ca33afbd8e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Use get_category_index()

This creates the first uses of the function added in the previous commit.

It changes the name of a function that now takes an index to have the
suffix _i to indicate its calling parameter is a category index rather
than a category.  This will become a common paradigm in this file in
later commits.

Two macros are also created to call that function; they have suffixes _c
(to indicate the parameter is a category known at compile time, and _r
(to indicate it needs to be computed at runtime).  This is in keeping
with the already existing paradigm in this file.


  Commit: c0590c85fafb6b24ccfbc5d547bf0826c89582fb
      https://github.com/Perl/perl5/commit/c0590c85fafb6b24ccfbc5d547bf0826c89582fb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Change S_emulate_setlocale name and sig

It turns out this function is called only from places where we have the
category index already computed; so change the signature to use the
index and remove the re-calculation.

It renames it to emulate_setlocale_i() to indicate that the category
parameter is an index.

This also means, that it's very unlikely that it will be called with an
out-of-bounds value.  Remove the debugging statement for that case (but
retain the error return value).


  Commit: 07beb2d4016b66c7a0c2b5a10a33865341256977
      https://github.com/Perl/perl5/commit/07beb2d4016b66c7a0c2b5a10a33865341256977
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use nocontext; avoid rarely needed dTHX

This is a rare case; no point in doing a dTHX just for it.


  Commit: 8ebc42cd6b970f1d6511e2cc9dcd375907704f18
      https://github.com/Perl/perl5/commit/8ebc42cd6b970f1d6511e2cc9dcd375907704f18
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M pod/perldelta.pod
    M pod/perldiag.pod

  Log Message:
  -----------
  locale.c: Simplify S_category_name

We can use the new function S_get_category_index() to simplify this.
Also, when I wrote it I didn't know about Perl_form(), and had
reimplemented a portion of it here; which is yanked as well.


  Commit: 126190a933d668f502d1ba02e04bce624461248f
      https://github.com/Perl/perl5/commit/126190a933d668f502d1ba02e04bce624461248f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Move unreachable code

It turns out this code, setting errno, is unreachable.  Move it to the
place where it would do some good, removing an extraneous, unreachable
return;


  Commit: d9d70e64006ae625a66a16835811e9aee4c5d845
      https://github.com/Perl/perl5/commit/d9d70e64006ae625a66a16835811e9aee4c5d845
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Comment clarifications, white space

Some of these are to make future difference listings shorter

Some of the changes look like incorrect indentation here, but anticipate
future commits.


  Commit: 7f5d69b4ad162a1a80e9e8aad7d8f5949cc59b98
      https://github.com/Perl/perl5/commit/7f5d69b4ad162a1a80e9e8aad7d8f5949cc59b98
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Separate query part of emulate_setlocale()

This splits a large function so that it is easier to comprehend, and is
in preparation for them to be separately callable.


  Commit: 06b74d3c7acdf9a15e0611a7aa72e5587f9ee513
      https://github.com/Perl/perl5/commit/06b74d3c7acdf9a15e0611a7aa72e5587f9ee513
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Remove spaces around a '##' preprocessor directive

It turns out that at least my gcc preprocessor gets confused in some
contexts if spaces surround the ##.  CAT2() doesn't work for these.

It is working in this context, but future commits will introduce ones
where it won't, so this commit will help make things consistent within
this file

What seems to fail is #define f(x) (..., g(x ## y), ...) where 'x' is a
an already #defined symbol.  I want 'xy', but instead, for example if
'x' has been defined to be 1, I get '1y'


  Commit: 87036307e9db3bf3026d4b52032e31fcaa73a8a1
      https://github.com/Perl/perl5/commit/87036307e9db3bf3026d4b52032e31fcaa73a8a1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: #define some macros in terms of a base one

This is so changes to the lowest level automatically propagate to the
others


  Commit: faf36cfca5b4109322a67d3b1379742569975dcc
      https://github.com/Perl/perl5/commit/faf36cfca5b4109322a67d3b1379742569975dcc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Create new macros for just querying locale

There are two sets of names, which immediately indicate if the result
can be relied on to be thread level or must be assumed to be global to
the whole process.  At the moment they all expand to the same thing,
since on a threadless perl, it's a don't care; and on a threaded perl,
they are all already thread-level, in the Configurations we support.

Future commits will cause the macros to diverge, and comments will be
added then.

For POSIX 2008, this commit causes queries to go directly to the query
function, avoiding S_emulate_setlocale_i() completely.


  Commit: fa84c664d194750cbdaafc5b24601d03a4671212
      https://github.com/Perl/perl5/commit/fa84c664d194750cbdaafc5b24601d03a4671212
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Generalize certain Win32 calls

The old versions were windows-specific; the changes use a more generic
macro that currently expands to the same thing, but future commits will
change that.


  Commit: 0c4ddb141798528705367f5cd689142c13a8c1c5
      https://github.com/Perl/perl5/commit/0c4ddb141798528705367f5cd689142c13a8c1c5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add a convenience #define

This makes it clear if we are using an array that currently only happens
on non-querylocale systems, but that will change in future commits.


  Commit: 62286c4190deda85e88aa1ee984686e2988f975d
      https://github.com/Perl/perl5/commit/62286c4190deda85e88aa1ee984686e2988f975d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add setlocale() return context macros

Future commits will benefit from knowing if the return value of
setlocale is to be ignored, just checked for if it worked, or the full
value is needed and can be relied on (or not) to be per-thread.


  Commit: 4721f243e6454b401f2f08e562ce408cb6aa20be
      https://github.com/Perl/perl5/commit/4721f243e6454b401f2f08e562ce408cb6aa20be
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add panic check/message

This panic is done when a setlocale unexpectedly fails.


  Commit: 4d2e3b3b2374856a6a2bdc229bc94cfc242adbe0
      https://github.com/Perl/perl5/commit/4d2e3b3b2374856a6a2bdc229bc94cfc242adbe0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Use a function table to simplify code

Some locale categories require extra steps when they are changed.  This
moves that logic to a table, which gets rid of some code


  Commit: e370b57862d8d3d057fb6e1c59fa92f923101f62
      https://github.com/Perl/perl5/commit/e370b57862d8d3d057fb6e1c59fa92f923101f62
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Perl_setlocale(): Same code for all param2 == NULL

Calling Perl_setlocale() with a NULL 2nd parameter returns the current
locale, rather than changing it.  Previously LC_NUMERIC and LC_ALL were
treated specially; other categories were lumped in with the code that
changes the locale.

Changing some categories involves a non-trivial amount of work.  This
commit avoids that by moving all queries to the same 'if' branch.
LC_NUMERIC and LC_ALL still have to be treated specially, but now it's
all within the same outer 'if', and the unnecessarily executing code
for when the locale changes is avoided.


  Commit: 35cdc308c43f7a4c955b116a6f9bac097fbdd6c5
      https://github.com/Perl/perl5/commit/35cdc308c43f7a4c955b116a6f9bac097fbdd6c5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use low level macros at low level

Implementing Perl_setlocale, we can safely use the internal macros that
the public ones expand to call, without the overhead those public macros
impose (which they do to be more immune from improper calls from outside
code).


  Commit: 057c4bb994ee427881467c2a5922845574909eca
      https://github.com/Perl/perl5/commit/057c4bb994ee427881467c2a5922845574909eca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Remove exploratory code

This code was to find out, in debugging builds, if an undocumented glibc
feature worked.  There were no reports that it didn't, and so, after,
several releases, it has served its purpose.  A future commit will allow
enabling this feature as a Configuration option.


  Commit: c29e2890cd2ca3cb884728b4c91b841bb687cf74
      https://github.com/Perl/perl5/commit/c29e2890cd2ca3cb884728b4c91b841bb687cf74
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Expand scope of cpp conditional

This just doesn't bother with checking some locale-related stuff if not
paying attention to locales.


  Commit: b246091a6ba6878841ce179642483ac5fc7e9e21
      https://github.com/Perl/perl5/commit/b246091a6ba6878841ce179642483ac5fc7e9e21
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  locale.c: Create new convenience macro

glibc doesn't have the querylocale() function, available on some other
platforms, such as Darwin and *BSD.  However, it instead has the
equivalent functionality available through an undocumented feature.

This commit allows someone in the know to compile perl to use that
feature, and wraps its API with a macro so that the calling code doesn't
have to be aware of the different APIs of the two methods.

That macro's definition is now done in perl.h, as future commits will
used it in other files.

Since this is an undocumented feature, I am not currently documenting
this wrapper availability.  However, it has been used in the field
without complaint for a couple of releases, as follows:  A more
cumbersome substitute method continues to be used to get what it does.
But in the past both methods were tried and the program died if they
yielded different results.  Since no one has complained, I'm fairly
confident it works.  But sill I'm deferring its more general use.


  Commit: 5ed52420121e5cb0905207fc59f43dd8f59db618
      https://github.com/Perl/perl5/commit/5ed52420121e5cb0905207fc59f43dd8f59db618
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M intrpvar.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: querylocale() doesn't work on LC_ALL

I had misread the man pages.  This bug has been in the field for several
releases now, but most likely hasn't shown up because it's almost always
the case that the locale categories will be set to the same locale.  And
so most implementations of querylocale() would return the correct
result.

This commit works by splitting the calculation of the value of LC_ALL
from S_emulate_setlocale_i() into a separate function, and extending it
to work on querylocale() systems.  This has the added benefit of
removing tangential code from the main line, making
S_emulate_setlocale_i easier to read.

calculate_LC_ALL() is the new function, and is now called from two
places.

Part of this change is to keep our records of LC_ALL on non-querylocale
systems always up-to-date, which is better practice

And part of this change is temporary, marked as such, to be removed a
few commits later.


  Commit: 70d52f464331ced59c04e4989c78d5a495b5a6d0
      https://github.com/Perl/perl5/commit/70d52f464331ced59c04e4989c78d5a495b5a6d0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use setlocale() for init, not P2008

We have found bugs in the POSIX 2008 libc implementations on various
platforms.  This code, which does the initialization of locale handling
has always been very conservative, expecting possible failures due to
bugs in it our the libc implementations, and backing out if necessary to
a crippled, but workable state, if something goes wrong.

I think we should use the oldest, most stable locale implementation in
these circumstances


  Commit: 5110de22c836e8e70516a74b33d3703d5ec705d9
      https://github.com/Perl/perl5/commit/5110de22c836e8e70516a74b33d3703d5ec705d9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Split aggregate LC_ALL from emulate_setlocale

This splits into a separate function the code necessary in some
Configurations to calculate LC_ALL from a potentially disparate
aggregate of categories having different locales.

This done just for readability, as this extensive code in the middle of
something else distracts from the main point.

A goto is hence replaced by a recursive call.


  Commit: f3a73eae514e912eebe9b24d67826d63465865a0
      https://github.com/Perl/perl5/commit/f3a73eae514e912eebe9b24d67826d63465865a0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Change internal variable name

The new name better reflects its purpose, so is less confusing


  Commit: 19230bc07a0617afd19361333a10505163faae95
      https://github.com/Perl/perl5/commit/19230bc07a0617afd19361333a10505163faae95
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Clean up handling of a glibc bug

This commit moves all mention of this bug to just the code that requires
it, and inlines a macro, making it easier to comprehend


  Commit: c88cdc1a60a8e8768a3bafcff39e4bb8653fec84
      https://github.com/Perl/perl5/commit/c88cdc1a60a8e8768a3bafcff39e4bb8653fec84
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Split ancillary from S_emulate_setlocale

This takes the code to update LC_ALL, used only in some Configurations,
out of the main line, making the main line more readable.

It also allows the removal of temporary code added a few commits back


  Commit: 3880d5b2f1eefe9a814b7ec0ef535a18652892ca
      https://github.com/Perl/perl5/commit/3880d5b2f1eefe9a814b7ec0ef535a18652892ca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: locale "" can be disparate

Setting a locale "" means to get the value from environment variables.
These can set locale categories to different locales, and this needs to
be handled.  The logic before this commit only handled the disparate
case when the locale wasn't ""; but this was compensated for elsewhere.
A future commit will remove that compensation.


  Commit: 549a26ca5f7abbde5f74a388255d37977568c213
      https://github.com/Perl/perl5/commit/549a26ca5f7abbde5f74a388255d37977568c213
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  Split off setting locale to "" from S_emulate_setlocale

This is done for readability, to move the special casing of setting a
locale to the empty string (hence getting it from the environment) out
of the main line code.


  Commit: b9c94099dea44069a0c3c53188061d12b1965fd5
      https://github.com/Perl/perl5/commit/b9c94099dea44069a0c3c53188061d12b1965fd5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M sv.c

  Log Message:
  -----------
  sv.c: Duplicate more variables during cloning

These locale-related ones should be getting initialized in the new
thread, but be certain.


  Commit: 4f3069ec385d6ed1f9e54884b730be272d25a269
      https://github.com/Perl/perl5/commit/4f3069ec385d6ed1f9e54884b730be272d25a269
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M embedvar.h
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M proto.h
    M sv.c

  Log Message:
  -----------
  locale.c: Add fcn to hide edge case undefined behavior

The POSIX 2008 API has an edge case in that the result of most of the
functions when called with a global (as opposed to a per-thread) locale
is undefined.

The duplocale() function is the exception which will create a per-thread
locale containing the values copied from the global one.

This commit just calls duplocale, if needed, and the caller need not
concern itself with this possibility


  Commit: 5765a4510e2a6016e465fc5b70afbf8c319e4308
      https://github.com/Perl/perl5/commit/5765a4510e2a6016e465fc5b70afbf8c319e4308
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add DEBUGGING information

These functions are called as expansions of macros.  It may be useful to
know where in the file the macro occurred.


  Commit: 8e734563201d8a29677814ddab5652e5f5675d6f
      https://github.com/Perl/perl5/commit/8e734563201d8a29677814ddab5652e5f5675d6f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Separate out two Win fcns from a larger one

This makes the larger one easier to understand, and prepares for
possible independent calls to the two, which are potentially useful on
their own.


  Commit: f783b399b679c0e15ce914e3b83cfc5bd2a4eed0
      https://github.com/Perl/perl5/commit/f783b399b679c0e15ce914e3b83cfc5bd2a4eed0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

  Log Message:
  -----------
  POSIX.xs: Use macro to reduce complexity

This #defines a macro and uses it to populate a structure, so that
strings don't have to be typed twice.


  Commit: dc16dfd0444e0d614d2c19a44fda0646fe2f55af
      https://github.com/Perl/perl5/commit/dc16dfd0444e0d614d2c19a44fda0646fe2f55af
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

  Log Message:
  -----------
  POSIX.xs: White-space only

Properly indent some nested preprocessor directives


  Commit: fb76e603599edb29b612a125715b4d3f9dafe082
      https://github.com/Perl/perl5/commit/fb76e603599edb29b612a125715b4d3f9dafe082
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M ext/POSIX/POSIX.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  Move code from POSIX.xs to locale.c

This avoids duplicated logic.


  Commit: 7824b156922d57145e203d938d79080ca83699dc
      https://github.com/Perl/perl5/commit/7824b156922d57145e203d938d79080ca83699dc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Reorder cases in a switch

This moves handling the CODESET to the end, as future commits will make
its handling more complicated.  The cases are now ordered so the
simplest (based on the direction of future commits) are first


  Commit: 026730e221e78fc2a3d51745fc32971fad2267ad
      https://github.com/Perl/perl5/commit/026730e221e78fc2a3d51745fc32971fad2267ad
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Make statics of repeated string constants

These strings are (or soon will be) used in multiple places; so have
just one definition for them.


  Commit: 53a12c82ee95eb9e51b2e078b2b0b447c6a64e7a
      https://github.com/Perl/perl5/commit/53a12c82ee95eb9e51b2e078b2b0b447c6a64e7a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add two #defines

This makes sure that we handle having any variant of nl_langinfo() or
localeconv().


  Commit: a4fdf2811d8f57a2d18a5ea14fc26616b0527421
      https://github.com/Perl/perl5/commit/a4fdf2811d8f57a2d18a5ea14fc26616b0527421
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Return defaults for uncomputable langinfo items

Return the values from the C locale for nl_langinfo() items that aren't
computable on this platform.  If the platform has nl_langinfo(), then
all of them are computable, but if not, some can't be computed, and
others can be, but only if there are alternative methods available on
the platform.

As part of this commit, S_my_nl_langinfo() and S_save_to_buffer() are no
longer used when USE_LOCALE is not defined, so don't compile them.


  Commit: 11de5d2bdc40503cc9b75458d1f7cc16c074c5d8
      https://github.com/Perl/perl5/commit/11de5d2bdc40503cc9b75458d1f7cc16c074c5d8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Rmv reimplementation of my_strftime()

Prior to this commit, there was a near duplicate copy of the code from
util.c that implements my_strftime().  This was done because the util.c
version zaps the wday field, which made it incompatible.

But it dawned on me that if the arbitrary date we use to do our
calculations were such that it was for a year in which January 1 falls
on a Sunday, then the util.c version automatically works.


  Commit: 94966934f0da81c87376a0659e9a25786c99d747
      https://github.com/Perl/perl5/commit/94966934f0da81c87376a0659e9a25786c99d747
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Shorten static function name

The extra syllable(s) are unnecessary noise


  Commit: 53cdc9cd6600f3808f3fbf73bddca6eca6da4323
      https://github.com/Perl/perl5/commit/53cdc9cd6600f3808f3fbf73bddca6eca6da4323
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Extend a static function

This will allow it to be used in situations where the buffer it controls
is single use, and we don't need to keep track of the size for future
calls.


  Commit: 11e96d7647531863f541054cc3024817e85ea9ed
      https://github.com/Perl/perl5/commit/11e96d7647531863f541054cc3024817e85ea9ed
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use typedef to simplify

This allows some preprocessor conditionals to be removed


  Commit: 35a38e5bd8567d89f25f3f287e4f71836b5a395c
      https://github.com/Perl/perl5/commit/35a38e5bd8567d89f25f3f287e4f71836b5a395c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Rmv redundant cBOOL()

strEQ and && already return booleans


  Commit: 0997a42ffeea5b964d8d85f7cefb173ca90d1244
      https://github.com/Perl/perl5/commit/0997a42ffeea5b964d8d85f7cefb173ca90d1244
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Fix currency symbol derivation

On platforms without nl_langinfo(), we derive the currency symbol from
localeconv().  The symbol must be tweaked to conform to nl_langinfo()
standards.  Prior to this commit, it guessed at how to tweak a rare
circumstance.  I now have seen evidence this guess was wrong, so give up
on it.

This also no longer returns just an empty string in certain cases.
nl_langinfo() itself doesn't, so conform to that.


  Commit: bb5ffe698bd316c42e6613c88bd2ac8d5fde6ed3
      https://github.com/Perl/perl5/commit/bb5ffe698bd316c42e6613c88bd2ac8d5fde6ed3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Don't add CP to Windows code page names

The actual name appears to be just the number for purposes of
nl_langinfo()-ish things.


  Commit: 8b70b74c6268661e1b874b01d6cd9dba5b145f6c
      https://github.com/Perl/perl5/commit/8b70b74c6268661e1b874b01d6cd9dba5b145f6c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Don't ask a static fcn to be inlined

It's too complicated to really be inlined, and the compiler can figure
things out itself given it is a static function


  Commit: f2ef7bbd9547d01ae93e41697470b05bef20ea61
      https://github.com/Perl/perl5/commit/f2ef7bbd9547d01ae93e41697470b05bef20ea61
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Rmv no longer used param from static fnc

Previous commits have gotten rid of this parameter to S_save_to_buffer


  Commit: a1f10808322edb1daf3d219277b5082e8e81b625
      https://github.com/Perl/perl5/commit/a1f10808322edb1daf3d219277b5082e8e81b625
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Don't change locale if already there

Changing the locale is cheap for some categories, but expensive for
others.  Changing LC_COLLATE is most expensive, requiring recalculation
of the collation transformation mapping.

This commit checks before blindly changing locales that we aren't
already in the desired one, in which case this could be just as well a
no-op, and with this commit becomes one.


  Commit: dd00fcb584536d8494f4c355ab4048dc4292c010
      https://github.com/Perl/perl5/commit/dd00fcb584536d8494f4c355ab4048dc4292c010
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M intrpvar.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  Make three locale PL_ strings const char*

This adds some compile safety to these.


  Commit: 8e5ee4fd70420b65689b791dc147bf6f66c6c7fd
      https://github.com/Perl/perl5/commit/8e5ee4fd70420b65689b791dc147bf6f66c6c7fd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use a scratch buf; instead of resuing old

This is in preparation for the next commit


  Commit: ce5d6af96997f9cae2ba1ffaea80f66d0bd0196e
      https://github.com/Perl/perl5/commit/ce5d6af96997f9cae2ba1ffaea80f66d0bd0196e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Make static fcn reentrant

This makes my_langinfo() reentrant by adding parameters specifying where
to store the result.

This prepares for future commits, and fixes some minor bugs for XS
writers, in that the claim was that the buffer in calling
Perl_langinfo() was safe from getting zapped until the next call to it
in the same thread.  It turns out there were cases where, because of
internal calls, the buffer did get zapped.


  Commit: f19f8665a9023e25b6eb37a42a8d5db67a77b5cd
      https://github.com/Perl/perl5/commit/f19f8665a9023e25b6eb37a42a8d5db67a77b5cd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: langinfo: Use Windows fcn to find CODESET

There is a Windows function available for quite a long time that will
return the current code page.  Use this for the nl_langinfo() CODESET,
as that libc function isn't implemented on Windows.


  Commit: db30c796f283ffc27eeb8c79d1a01cbedb515a1f
      https://github.com/Perl/perl5/commit/db30c796f283ffc27eeb8c79d1a01cbedb515a1f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add static fcn to analyze locale codeset

It determines if the name indicates it is UTF-8 or not.  There are
several variant spellings in use, and this hides that from the the
callers.

It won't be actually used until the next commit


  Commit: 5f7cfadfb54e06522b43015ee93be7d098299bfa
      https://github.com/Perl/perl5/commit/5f7cfadfb54e06522b43015ee93be7d098299bfa
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M ext/I18N-Langinfo/Langinfo.pm
    M locale.c

  Log Message:
  -----------
  locale.c: Improve non-nl_langinfo() CODESET calc

Prior to this commit, on non-Windows platforms that don't have a
nl_langinfo() libc function, the code completely punted computation of
the CODESET item.  I have not been able to figure out how to do this,
even going to the locale definition files on disk (which may vary
anyway), but we can do a lot better than punting.

This commit adds three checks:

1) If the locale name is C or POSIX, we know the codeset

2) We can detect if a locale is UTF-8.  If it is, that is the codeset.
Many modern locales are of this ilk.

3) Failing that, some locales have the codeset appear in the name,
following a dot.

It isn't perfect, but it's a lot better than completely punting.


  Commit: 87dc45e2efd7c5e9ef639e5cfe89198821160657
      https://github.com/Perl/perl5/commit/87dc45e2efd7c5e9ef639e5cfe89198821160657
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  New signature for static fcn my_langinfo()

This commit changes the calling sequence for my_langinfo to add the
desired locale (or a sentinel to indicate to use the current locale),
and the locale category of the desired item.

This allows the function to be able to return the desired value for any
locale, avoiding some locale changes that would happen until this
commit, and hiding the need for locale changes from outside functions,
though a couple continue to do so to avoid potential multiple changes.


  Commit: 7dfc54fb013bb54273575ce8319d2e8876fade90
      https://github.com/Perl/perl5/commit/7dfc54fb013bb54273575ce8319d2e8876fade90
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add is_locale_utf8()

Previous commits have added the infrastructure to be able to determine
if a locale is UTF-8.  This will prove useful, and this commit adds
a function to encapsulate this information, and uses it in a couple of
places, with more to come in future commits.

This uses as a final fallback, mbtowc(), which some sources view was a
late adder to C89, and others as not really being available until C99.
Future commits will add heuristics when that function isn't available.


  Commit: 80cca693586522fb20960e0e26bc6cc0ce4156ea
      https://github.com/Perl/perl5/commit/80cca693586522fb20960e0e26bc6cc0ce4156ea
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add fcn for UTF8ness determination

get_locale_string_utf8ness_i() will determine if the string it is passed
in the locale it is passed is to be treated as UTF-8, or not.


  Commit: 5a062077a77127d62c015997ac5402288c9ccc2c
      https://github.com/Perl/perl5/commit/5a062077a77127d62c015997ac5402288c9ccc2c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M ext/POSIX/POSIX.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXX perldelta Move POSIX::localeconv() logic to locale.c

The code currently in POSIX.xs is moved to locale.c, and reworked some
to fit in that scheme, and the logic for the workaround for the Windows
broken localeconv() is made more robust.

This is in preparation for the next commit which will use this logic
instead of (imperfectly) duplicating it.

This also creates Perl_localeconv() for direct XS calls of this
functionality.


  Commit: ce019fb113afb798fab4c9d2c76eb0aa04f5bccd
      https://github.com/Perl/perl5/commit/ce019fb113afb798fab4c9d2c76eb0aa04f5bccd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Collapse duplicate logic into one instance

The previous commit move the logic for localeconv() into locale.c.  This
commit takes advantage of that to use it instead of repeating the logic.

On Windows, there is alternative way of finding the radix character for
systems that have a localeconv() that could cause a race.  Prior to this
commit, if that failed to find something that looked like the radix, it
returned a '?'.  Now it will drop down to using this new code, as the
likelihood of the race is small.

Notably, this commit removes the inconsistent duplicate logic that had
been used to deal with the Windows broken localeconv() bug.


  Commit: a60b28bccf8d3504e1c4cba35673677e5e1fab6f
      https://github.com/Perl/perl5/commit/a60b28bccf8d3504e1c4cba35673677e5e1fab6f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Fix windows bug with broken localeconv()

localeconv() was broken on Windows until VS 2015.  As a workaround, this
was using my_snprintf() to find what the decimal point character is,
trying to avoid our workaround for localeconv(), which has a (slight)
chance of a race condition.

The problem is that my_snprintf() might not end up calling snprintf at
all; I didn't trace all possibilities in Windows.  So it doesn't make
for a reliable sentinel.

This commit now specifically uses libc snprintf(), and if it fails, drops
down to try localeconv().


  Commit: 4a5b11c353134db4f7c359643b1cf4d2e77aa53d
      https://github.com/Perl/perl5/commit/4a5b11c353134db4f7c359643b1cf4d2e77aa53d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M ext/POSIX/POSIX.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXXdelta Add my_strftime8()

This is like plain my_strftime(), but additionally returns an indication
of the UTF-8ness of the returned string


  Commit: e8655943b952018b643869e8d2fa5363ba0d8e0a
      https://github.com/Perl/perl5/commit/e8655943b952018b643869e8d2fa5363ba0d8e0a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add utf8ness return param to static fcn

my_langinfo_i() now will additionally return the UTF-8ness of the
returned string.


  Commit: 82d7869bb2f8a2afa772e538ab7cf3148605d3f1
      https://github.com/Perl/perl5/commit/82d7869bb2f8a2afa772e538ab7cf3148605d3f1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M ext/I18N-Langinfo/Langinfo.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXXdelta Add Perl_langinfo8()

This is like Perl_langinfo() but additionally returns information about
the UTF-8ness of the returned string.


  Commit: 0b857ca4f44c79b7538beba07aad965ccd6f9c68
      https://github.com/Perl/perl5/commit/0b857ca4f44c79b7538beba07aad965ccd6f9c68
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add fallbacks if no mbtowc()

This add heuristics that work well for non-English locales to determine
if a locale is UTF-8 or not when mbtowc() isn't available.  It would be
a very rare compiler that didn't have that these days, but this covers
that case as best as I have been able to figure out.


  Commit: fea8be85a7d1ce66b290b073494982ee7eba93d1
      https://github.com/Perl/perl5/commit/fea8be85a7d1ce66b290b073494982ee7eba93d1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use Strerror(), not strerror()


  Commit: 033970c0bfbe6d93fab8ab0ab826aa86209e5600
      https://github.com/Perl/perl5/commit/033970c0bfbe6d93fab8ab0ab826aa86209e5600
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Refactor #ifdef's for clarity

The my_strerror() function has effectively 5 different implementations
depending on the capabilities of the platform.  Only a few lines are
common to all, the set-up and the return.  The #ifdefs obscure the
underlying logic.  So this commit separates them out into 5 different
functions, with the result that it's clear what is going on in each.


  Commit: b4c755e70f2e5c6f9161ddde1a0218cb819d21c2
      https://github.com/Perl/perl5/commit/b4c755e70f2e5c6f9161ddde1a0218cb819d21c2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Avoid mojibake in "$!"

In stress testing, I discovered that the LC_CTYPE and LC_MESSAGES
locales need to be the same locale, or strerror() can return
question marks or mojibake instead of the proper message.

This commit refactors the handling of stringifying "$!" to make the
locales of both categories the same during the stringification.

Actually, I suspect it isn't the locale, but the codeset of the locale
that needs to be the same.  I suspect that if the categories were both
in different UTF-8 locales, or both in single-byte locales, that things
would work fine.  But it's cheaper to find the locale rather than the
locale's codeset, so that is what is done.


  Commit: a5ce9fa2e1e0abd5cfc84a8d6da422b807130a09
      https://github.com/Perl/perl5/commit/a5ce9fa2e1e0abd5cfc84a8d6da422b807130a09
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M makedef.pl
    M mg.c
    M proto.h

  Log Message:
  -----------
  Move utf8ness calc for $! into locale.c from mg.c

locale.c has the infrastructure to handle this, so remove repeated
logic.

The removed code tried to discern better based on using script runs, but
this actually doesn't help, so is removed.


  Commit: f9a1073d5597114df45475f3dae3db6d46e26354
      https://github.com/Perl/perl5/commit/f9a1073d5597114df45475f3dae3db6d46e26354
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M mg.c

  Log Message:
  -----------
  mg.c: White-space only

Indent newly formed block from the previous commit.


  Commit: dc9566dd0dbbb7c9d3b96dee7a64380c9b027354
      https://github.com/Perl/perl5/commit/dc9566dd0dbbb7c9d3b96dee7a64380c9b027354
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M embedvar.h
    M intrpvar.h
    M locale.c
    M proto.h
    M sv.c

  Log Message:
  -----------
  locale.c: Rmv no longer used code; UTF8ness cache

What these functions do has been subsumed by code introduced in previous
commits, and in a more straight forward manner.

Also removed in this commit is the cache of the knowing what locales are
UTF-8 or not.  This data is now cheaper to calculate when needed, and
there is now a single entry cache, so I don't think the complexity
warrants keeping it.

It could be added back if necessary, split off from the remainder of
this commit.


  Commit: df94fc1477538d7bc6aaf2c735a12716ebacfb1a
      https://github.com/Perl/perl5/commit/df94fc1477538d7bc6aaf2c735a12716ebacfb1a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Don't discard locale info in starting P2008

The program is started in the global locale, and then is converted to
the POSIX 2008 per-thread locale API.  Prior to this commit the startup
locale was discarded.  It really should be the foundation for the 2008
locales.  I don't know of any current paths through the code that this
makes a difference for, but it is a potential hole that is easy to plug.


  Commit: c738ba0142b0e4338587dfbc4dbf804e2d3f2357
      https://github.com/Perl/perl5/commit/c738ba0142b0e4338587dfbc4dbf804e2d3f2357
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M perl.h
    M proto.h

  Log Message:
  -----------
  Add a common locale panic macro and functions

This will make sure that all the necessary clean up gets done.


  Commit: d6e4bddca847eadaa6525ca79aab9d1785bb955b
      https://github.com/Perl/perl5/commit/d6e4bddca847eadaa6525ca79aab9d1785bb955b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Revamp sync_locale()

This rarely used function was actually failing to do what it purported
in some Configurations.


  Commit: f0fa1f56e46dcb41fc945b1240a46a0066660e16
      https://github.com/Perl/perl5/commit/f0fa1f56e46dcb41fc945b1240a46a0066660e16
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Clean up thread_locale_init()

We can use internal functions to this file instead of the API ones here.
This commit also calls  sync_locale() to avoid repeated logic.


  Commit: 8d86e8dd5a08aa19a943c0f86ba2f27cb2204b77
      https://github.com/Perl/perl5/commit/8d86e8dd5a08aa19a943c0f86ba2f27cb2204b77
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Revamp switch_to_global_locale()

Prior to this commit, the global locale was not always getting populated
with the values from the thread being switched.


  Commit: c2d1317a7605ed982651ac208191b740c8861eb5
      https://github.com/Perl/perl5/commit/c2d1317a7605ed982651ac208191b740c8861eb5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Omit an extra copy

In this case in Perl_setlocale(), we can just return the plain result
from setlocale(), as, if something further needs to be done that would
destroy it, that is taken care of already at the time.

On per-thread locale platforms, the result already is in a per-category
buffer.


  Commit: 90d7cd5fc8743e84ec7a0dbe004833556fe0adda
      https://github.com/Perl/perl5/commit/90d7cd5fc8743e84ec7a0dbe004833556fe0adda
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M sv.c

  Log Message:
  -----------
  locale.c: Cache the current LC_CTYPE locale name

This is now used as a cache of length 1 to avoid having to lookup up the
UTF-8ness as often.

There was a complicated cache previously, but changes to the logic
caused that to be much less necessary, and it is no longer actually
used, and will be removed in a later commit.

But it's pretty easy to keep this single value around to cut further
down the new scheme's need to look it up


  Commit: fa22df2de94624a41aecedb820710eec41123efe
      https://github.com/Perl/perl5/commit/fa22df2de94624a41aecedb820710eec41123efe
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M intrpvar.h

  Log Message:
  -----------
  intrpvar.h: Initialize a variable

I don't believe there is a bug with this PL_numeric_name being
uninitialized, but this is an easy precaution.


  Commit: e1e8847feb631fe9cd823c18b16b68faadc57366
      https://github.com/Perl/perl5/commit/e1e8847feb631fe9cd823c18b16b68faadc57366
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Swap the ordering of two locale category indices

Perl internally uses a mapping of locale category values into a
consecutive sequence of indices starting at 0.  These are used as
indexes into arrays.  The reason is that the category numbers are
opaque, vary by platform, aren't necessarily sequential, and hence are
hard to make table driven code for.

This commit makes the LC_CTYPE index 0, and LC_NUMERIC equal to 1;
swapping them.  The reason is to cause LC_CTYPE to get done first in the
many loops through the categories.  The UTF8ness of categories is an
often needed value, and most of the time the categories will have the
same locale.  LC_CTYPE is needed to calculate the UTF8ness, and by doing
it first and caching the result, the other categories likely
automatically will use the same value, without having to recalculate.


  Commit: 5a4ad6f047687bd706fdac8c8c20894941e9b192
      https://github.com/Perl/perl5/commit/5a4ad6f047687bd706fdac8c8c20894941e9b192
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use new mechanism to save/restore errno

Instead of explicitly saving the errno around debugging statements, the
new more general mechanism is used.


  Commit: 283f625be94a24ec013ea6fcd8da0e61ec6c2511
      https://github.com/Perl/perl5/commit/283f625be94a24ec013ea6fcd8da0e61ec6c2511
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Move DEBUG location info

This commit takes advantage of the new mechanism to add common DEBUGGING
code to print the __FILE__ and __LINE__ of every debugging statement.
This allows those to be removed from each statement, and have them
implicitly added.

This make things consistent, and easier to read and add new statements.


  Commit: 823bbbee4313b57932cc292afca9c9f8fdd4da89
      https://github.com/Perl/perl5/commit/823bbbee4313b57932cc292afca9c9f8fdd4da89
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add some asserts


  Commit: e5d7c16db9bba8ddfca262e8b0a7baa609866bed
      https://github.com/Perl/perl5/commit/e5d7c16db9bba8ddfca262e8b0a7baa609866bed
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Reorder code, rmv unneeded conditional

Previous commits have made the conditional about being able to find the
radix character unnecessary.  The called function my_langinfo_c()
handles the case properly.

This commit also makes the trivial case first in a conditional, as that
is easier to comprehend.


  Commit: cdf9b0972c5f5c82528a9c5139679e2c037009e7
      https://github.com/Perl/perl5/commit/cdf9b0972c5f5c82528a9c5139679e2c037009e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Reorder 'if' branches

It's better for understandability to have positive tests than negative
ones


  Commit: 4e8a15027cd50abbd005a2155b4cb30d350a7763
      https://github.com/Perl/perl5/commit/4e8a15027cd50abbd005a2155b4cb30d350a7763
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Refactor a static function

S_new_numeric() is called after the LC_NUMERIC category is changed, to
update various ancillary information Perl keeps.

This reorders the function so that on POSIX 2008 platforms, the numeric
object is created earlier.  This allows for fewer operations on those
platforms, as we already have the correct value in place for querying
what the radix and thousands separator characters are.

Explanatory comments are also added.


  Commit: 86c49f9a88cd94bc87eb0f26f4a31ea182c1d851
      https://github.com/Perl/perl5/commit/86c49f9a88cd94bc87eb0f26f4a31ea182c1d851
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Change assert() into STATIC_ASSERT()


  Commit: 7d79abac55e73a5e625830133397eb8cc1ce69d0
      https://github.com/Perl/perl5/commit/7d79abac55e73a5e625830133397eb8cc1ce69d0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use standard fold table for C locale

Copy the standard compiled-in ASCII fold table when the locale is C or
POSIX, instead of looping through all 256 characters and computing them.
This saves some time as well as ensures that any platform bugs become
irrelevant.


  Commit: 011d00bff8568b3d1297fb9896b7c00108949689
      https://github.com/Perl/perl5/commit/011d00bff8568b3d1297fb9896b7c00108949689
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add check that strxfrm didn't fail

The code failed to take into account that strxfrm() can fail for reasons
besides buffer length.  It does not return errors, and the only way to
check is to set errno to 0 beforehand, and check that it is still 0
afterwards.


  Commit: ea7e5eb2535e120a06c2c57631c1710d0006d1a8
      https://github.com/Perl/perl5/commit/ea7e5eb2535e120a06c2c57631c1710d0006d1a8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Don't assume LC_CTYPE, LC_COLLATE are same

This code is using isCNTRL_LC which depends on LC_CTYPE to verify that
something in the LC_COLLATE locale is a control.  That only works
properly if the two locales are the same.  This commit adds code to
ensure they are.


  Commit: 317e81dfc6462dbaec318410180cb474eea66376
      https://github.com/Perl/perl5/commit/317e81dfc6462dbaec318410180cb474eea66376
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: strxfrm() requires LC_CTYPE eq LC_COLLATE

The libc functions strxfrm() on some platforms requires the LC_CTYPE
locale to be the same as the LC_COLLATE locale (or rather, probably that
they have the same code set, but checking for locale is cheaper).
Otherwise mojibake would result, or more likely the function will fail,
setting errno.

This commit brings the locales into alignment if necessary


  Commit: 9f9a65e838486206740ac03a9faf43493128decd
      https://github.com/Perl/perl5/commit/9f9a65e838486206740ac03a9faf43493128decd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M Configure
    M Cross/config.sh-arm-linux
    M Cross/config.sh-arm-linux-n770
    M NetWare/config.wc
    M Porting/config.sh
    M config_h.SH
    M configure.com
    M metaconfig.h
    M plan9/config_sh.sample
    M uconfig.h
    M uconfig.sh
    M uconfig64.sh
    M win32/config.gc
    M win32/config.vc

  Log Message:
  -----------
  Configure: strxfrm_l


  Commit: d9d865974b645c6902bcbd6b6108bc1aef815173
      https://github.com/Perl/perl5/commit/d9d865974b645c6902bcbd6b6108bc1aef815173
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M lib/locale.t

  Log Message:
  -----------
  XXX temp: Windows debug


  Commit: 307ee29f9cf2b4ae2fe3e30d636ac715210a9271
      https://github.com/Perl/perl5/commit/307ee29f9cf2b4ae2fe3e30d636ac715210a9271
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use strxfrm_l() if available

This more modern version of the function doesn't require us to change
locales.


  Commit: e7d6898431c29c95e0f88796e9e8f9152ac1a110
      https://github.com/Perl/perl5/commit/e7d6898431c29c95e0f88796e9e8f9152ac1a110
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M mathoms.c
    M proto.h
    M sv.c

  Log Message:
  -----------
  Change name of internal function

This is in preparation for working on it; the new name, mem_collxfrm_ is
in compliance with the C Standard; the old was not.


  Commit: c9e10c6ee8e68bd37c8d3ccf253dc0fc5ac366e6
      https://github.com/Perl/perl5/commit/c9e10c6ee8e68bd37c8d3ccf253dc0fc5ac366e6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M ext/POSIX/POSIX.xs
    M ext/POSIX/lib/POSIX.pod
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXXdelta Fix POSIX::strxfrm()

This function takes an SV containing a PV.  The encoding of that PV is
based on the locale of the LC_CTYPE locale.  It really doesn't make
sense to collate based off of the sequencing of a different locale, which
prior to this commit it would do if the LC_COLLATION locale were
different.


  Commit: b8d1aa250e5f108565110d6e1ace594a5b6d6cb0
      https://github.com/Perl/perl5/commit/b8d1aa250e5f108565110d6e1ace594a5b6d6cb0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Improve debugging for mem_collxfrm()

This prints out more information, better organized.

It also moves up the info from -DLv to plain -DL


  Commit: 4e69ae8b958e3738561c7b673b4b6763598bfc5e
      https://github.com/Perl/perl5/commit/4e69ae8b958e3738561c7b673b4b6763598bfc5e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add debug statement for collation failure

Perhaps this should be a warning to the user that we couldn't calculate
collation info for the locale, but at least there should be a way to
get that info from a DEBUG statement


  Commit: aa3a0726f0f8c066e1dce18c8966e9599d8f266c
      https://github.com/Perl/perl5/commit/aa3a0726f0f8c066e1dce18c8966e9599d8f266c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Print code point in hex, not decimal

Hex is the more familiar form


  Commit: 90f063eabd68657a8025f9a75c152d88f311b4e2
      https://github.com/Perl/perl5/commit/90f063eabd68657a8025f9a75c152d88f311b4e2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs
    M locale.c
    M perl.h

  Log Message:
  -----------
  Mark certain mutex lock macros as private

mbtowc() mblen(), and wctomb() should not be directly used by XS
writers; instead use the POSIX versions.  Don't encourage the direct use
by having public macros to aid in their use.


  Commit: 6fe1ee358566f39b8d8a1613b9de601efb77ad80
      https://github.com/Perl/perl5/commit/6fe1ee358566f39b8d8a1613b9de601efb77ad80
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move some code around

This is purely to make future commits have smaller real difference
listings, and involves a temporary (complemented) copy of a preprocessor
conditional.


  Commit: 3a4dae3ee7596070bafcbc42991d9c82ac90f8ce
      https://github.com/Perl/perl5/commit/3a4dae3ee7596070bafcbc42991d9c82ac90f8ce
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.h
    M sv.c

  Log Message:
  -----------
  Make the locale mutex a general semaphore

Future commits will use this new capability, and in Configurations where
no locale locking is currently necessary.


  Commit: c082e73b8b1180b4553010fd939b13e385f076d5
      https://github.com/Perl/perl5/commit/c082e73b8b1180b4553010fd939b13e385f076d5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M makedef.pl
    M perl.h
    M perlvars.h
    M sv.c

  Log Message:
  -----------
  Use general locale mutex for numeric operations

This commit removes the separate mutex for locking locale-related
numeric operations on threaded perls; instead using the general locale
one.  The previous commit made that a general semaphore, so now suitable
for use for this purpose as well.

This means that the locale can be locked for the duration of some
sprintf operations, longer than before this commit.  But on most modern
platforms, thread-safe locales cause this lock to expand just to a
no-op; so there is no effect on these.  And on the impacted platforms,
one is not supposed to be using locales and threads in combination, as
races can occur.  This lock is used on those perls to keep Perl's
manipulation of LC_NUMERIC thread-safe.  And for those there is also no
effect, as they already lock around those sprintf's.


  Commit: 0c129015d00ecca36218361a7491c385cbdd07c8
      https://github.com/Perl/perl5/commit/0c129015d00ecca36218361a7491c385cbdd07c8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  Add locale macro to wrap static space using fncs

Some functions return a result in a global-to-the-program buffer, or
they have an internal global buffer.  Other threads must be kept from
simultaneously using that function.  This macro is to be used for all
such ones dealing with locales.  Ideally, there would be a separate mutex
for each such buffer space.  But these functions also have to lock the
locale from changing during their execution, and there aren't that many
such functions, and they actually are rarely executed.  So a single lock
will do.

This will allow future commits to have more targeted locking for
functions that don't affect the global locale.


  Commit: 0ccac40570a68abf7c08e6592ef7bcfb9e322503
      https://github.com/Perl/perl5/commit/0ccac40570a68abf7c08e6592ef7bcfb9e322503
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  Redefine the POSIX.xs locale macros using prev commit

This commit uses the new macro introduced in the previous commit to
define the internal locale mutex macros in POSIX.xs


  Commit: 00f480b38e9983c87037dd51ef85ba125961649e
      https://github.com/Perl/perl5/commit/00f480b38e9983c87037dd51ef85ba125961649e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  perl.h: Remove NL_LANGINFO_LOCK

This is needed in precisely one place in the code, so move it to there.


  Commit: 7ade2bb6177e91cb2491da5168d72e53f1d95d08
      https://github.com/Perl/perl5/commit/7ade2bb6177e91cb2491da5168d72e53f1d95d08
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  perl.h: Remove LOCALECONV_LOCK

This is needed in just one function, in locale.c, so more it there.


  Commit: 62e2efb86bef70a92384f3bc7564d27dfca5184e
      https://github.com/Perl/perl5/commit/62e2efb86bef70a92384f3bc7564d27dfca5184e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Add PORCELAIN_SETLOCALE_LOCK/UNLOCK

This macro is used to surround raw setlocale() calls so that the return
value in a global static buffer can be saved without interference with
other threads.

There are a few very rarely occurring instances in locale.c that are
converted to use this.  These previously could have been races.

The raw setlocalwes in the initialization function are not guarded, as
these happen early in the Perl process initialization, before threading
is enabled.

This is buggy if there are multiple embedded perls.  It can't be helped.
perlembed is being updated to indicate this.


  Commit: d74aaf5880561740a612babde17025bcc6464c19
      https://github.com/Perl/perl5/commit/d74aaf5880561740a612babde17025bcc6464c19
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move #defining SETLOCALE_LOCK

This simplifies slightly, and will allow further simplification


  Commit: 2e1cde8297da97f0b51a1483286e1b2559147d2f
      https://github.com/Perl/perl5/commit/2e1cde8297da97f0b51a1483286e1b2559147d2f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move LOCALE_READ_LOCK #definition

To enable future simplifications


  Commit: b5ecb1c05036b0a2f5d3729c50ec87c0c081e2a6
      https://github.com/Perl/perl5/commit/b5ecb1c05036b0a2f5d3729c50ec87c0c081e2a6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M perl.h
    M sv.c

  Log Message:
  -----------
  locale.c: Move #define to perl.h; use it elsewhere

 Rather than recalculate this combined conditional, do it once in
 perl.h.


  Commit: 808cce36cfcd644e229aebb7fbb5cd6060cd32e2
      https://github.com/Perl/perl5/commit/808cce36cfcd644e229aebb7fbb5cd6060cd32e2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Mitigate unsafe threaded locales

This a new set of macros and functions to do locale changing and
querying for platforms where perl is compiled with threads, but the
platform doesn't have thread-safe locale handling.

All it does is:

1) The return of setlocale() is always safely saved in a per-thread
buffer, and
2) setlocale() is protected by a mutex from other threads which are
using perl's locale functions.

This isn't much, but it might be enough to get some programs to work on
such platforms which rarely change or query the locale.


  Commit: 29fa07418679653f6944db0a5547fc55b77f8171
      https://github.com/Perl/perl5/commit/29fa07418679653f6944db0a5547fc55b77f8171
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cygwin/cygwin.c

  Log Message:
  -----------
  cygwin


  Commit: 8819764541520e1690100fe7d04ef49a86127068
      https://github.com/Perl/perl5/commit/8819764541520e1690100fe7d04ef49a86127068
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  XXX make sure comments get moved appropriately perl.h: Remove now empty block

Previous commits have left this empty except for comments.


  Commit: 399c87930ea4ee18b51e3db8acabe39b38802283
      https://github.com/Perl/perl5/commit/399c87930ea4ee18b51e3db8acabe39b38802283
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M embedvar.h
    M ext/POSIX/POSIX.xs
    M handy.h
    M inline.h
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M perl.h
    M proto.h
    M sv.c
    M util.c

  Log Message:
  -----------
  Emul


  Commit: ae95b6201ca7cad8ba0183409f3e36a1335bce98
      https://github.com/Perl/perl5/commit/ae95b6201ca7cad8ba0183409f3e36a1335bce98
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M lib/locale_threads.t
    M t/loc_tools.pl

  Log Message:
  -----------
  loc tools after emulation


  Commit: ae7f8593cfc09cb26eefd589589a877fefe76409
      https://github.com/Perl/perl5/commit/ae7f8593cfc09cb26eefd589589a877fefe76409
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M pp.c

  Log Message:
  -----------
  XXX pp.c: do %g print under mutex,


  Commit: bcaaf9681f54bc95065375950d45aaab8a1b0dd7
      https://github.com/Perl/perl5/commit/bcaaf9681f54bc95065375950d45aaab8a1b0dd7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M ebcdic_tables.h
    M embedvar.h
    M globvar.sym
    M intrpvar.h
    M perl.h
    M regen/ebcdic.pl

  Log Message:
  -----------
  XXX finish fold_locale

tests, copy in thread create


  Commit: a48d09d988a38c4a69a476b43997e8aeb74851d2
      https://github.com/Perl/perl5/commit/a48d09d988a38c4a69a476b43997e8aeb74851d2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M inline.h
    M locale.c

  Log Message:
  -----------
  XXX temp debug? locale.c, inline.h:foldEQ_locale


  Commit: 5d166ef321a3412e42aa38dc8e743f240aad7e2f
      https://github.com/Perl/perl5/commit/5d166ef321a3412e42aa38dc8e743f240aad7e2f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c comments


  Commit: 94bfb92ab90813cd25a204a723a96867539f80be
      https://github.com/Perl/perl5/commit/94bfb92ab90813cd25a204a723a96867539f80be
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXX prob drop; done before anything so no races


  Commit: eb70275dd9f18d41c6644ff5b0614b20d57e1713
      https://github.com/Perl/perl5/commit/eb70275dd9f18d41c6644ff5b0614b20d57e1713
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Add #define for gwENVr_LOCALEr_UNLOCK

This is for functions that read the locale and environment and write to
some global space.


  Commit: 1298d017ef847bd8a8512d8654368d74a3c0cc4d
      https://github.com/Perl/perl5/commit/1298d017ef847bd8a8512d8654368d74a3c0cc4d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h
    M time64.c

  Log Message:
  -----------
  Remove ENV_LOCALE_LOCK/UNLOCK macros

These are subsumed by gwENVr_LOCALEr_LOCK created in the previous
commit.


  Commit: d170796224c0fb56fd1dc826f2af42a20b2134de
      https://github.com/Perl/perl5/commit/d170796224c0fb56fd1dc826f2af42a20b2134de
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h
    M time64.c
    M util.c

  Log Message:
  -----------
  Change ENV/LOCALE locking read macro names

The old name was confusing.


  Commit: ba64fec4b40078281140d6cb9b9b9c826a9f6c2e
      https://github.com/Perl/perl5/commit/ba64fec4b40078281140d6cb9b9b9c826a9f6c2e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move some statements

So they are closer to related statements


  Commit: bbbfa4b9d57761631c761d5448470f03626dc96d
      https://github.com/Perl/perl5/commit/bbbfa4b9d57761631c761d5448470f03626dc96d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h
    M util.c

  Log Message:
  -----------
  perl.h: Finish implementing combo ENV/LOCALE mutexes

There are cases where an executing function is vulnerable to either the
locale or environment being changed by another thread.  This commit
implements macros that use mutexes to protect these critical sections.
There are two cases that exist:  one where the functions only read; and
one where they can also need exclusive control so that a competing
thread can't overwrite the returned static buffer before it is safely
copied.

5.32 had a placeholder for these, but didn't actually implement it.
Instead it locked just the ENV portion.  On modern platforms with
thread-safe locales, the locale portion is a no-op anyway, so things
worked on them.

This new commit extends that safety to other platforms.  This has long
been a vulnerability in Perl.


  Commit: 05f60c7311a39adc5c0a2f1d5f4c3a7470c2b073
      https://github.com/Perl/perl5/commit/05f60c7311a39adc5c0a2f1d5f4c3a7470c2b073
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M time64.c

  Log Message:
  -----------
  time64.c: Remove no longer needed code

This code defined some macros; those are now defined by perl.h


  Commit: 3da6de62e812e6460dd3fcb02a952a871fbaf97a
      https://github.com/Perl/perl5/commit/3da6de62e812e6460dd3fcb02a952a871fbaf97a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M pp_sys.c

  Log Message:
  -----------
  XXX need to StructCopy pp_sys mutexes


  Commit: 13d40f3a9ec19a2eb3fcd32ccee77d2febefe888
      https://github.com/Perl/perl5/commit/13d40f3a9ec19a2eb3fcd32ccee77d2febefe888
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M win32/win32.c

  Log Message:
  -----------
  win32.c: Add mutexes around some calls

These could have races.


  Commit: 9e6c9d87386976845373e7004e98c401d91e9567
      https://github.com/Perl/perl5/commit/9e6c9d87386976845373e7004e98c401d91e9567
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M util.c

  Log Message:
  -----------
  util.c: mktime needs to run under a mutex

per the Posix standard


  Commit: 65d09a28020e4c696c2deedcd42f07f71474d7df
      https://github.com/Perl/perl5/commit/65d09a28020e4c696c2deedcd42f07f71474d7df
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M dist/ExtUtils-ParseXS/lib/perlxs.pod
    M t/porting/known_pod_issues.dat

  Log Message:
  -----------
  perlxs


  Commit: 3fc1946d54e0dcfb3f17f8cde658191b44dabe3d
      https://github.com/Perl/perl5/commit/3fc1946d54e0dcfb3f17f8cde658191b44dabe3d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

  Log Message:
  -----------
  POSIX.xs env locks, check file for more


  Commit: c328d57d6123aa147960a77944ee929978ca5bb8
      https://github.com/Perl/perl5/commit/c328d57d6123aa147960a77944ee929978ca5bb8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M os2/os2.c

  Log Message:
  -----------
  os2: Use many reader lock instead of exclusive

This is just reading the environment, not changing it, so a many readers
can be accessing it at the same time.


  Commit: 1959573b6cac7cc3d53d04bfe547d5cdfebeebff
      https://github.com/Perl/perl5/commit/1959573b6cac7cc3d53d04bfe547d5cdfebeebff
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.pm
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  XXX cpan PR Time-Piece


  Commit: 9e172d0e1263d532530f998054dd116a6debac28
      https://github.com/Perl/perl5/commit/9e172d0e1263d532530f998054dd116a6debac28
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  cpan/Time-Piece/Piece.xs: Use foldEQ_locale() if available

Using this is preferable to the glibc function due to it being tailored
for Perl, and is thread-safe in the latest versions.


  Commit: 22382bd916bee99dad299e13e1fc28b020418d5b
      https://github.com/Perl/perl5/commit/22382bd916bee99dad299e13e1fc28b020418d5b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  Time-Piece/Piece.xs: Use isDIGIT, not isdigit

isDIGIT is not locale-dependent, matching just [0-9].  There was a bug
using isdigit() in at least one place where it calculated the value of
the digit by subtracting the original of '0' from it.  This works only
if the digit is in [0-9], but there are locales where there is another
set of digits, and so would give a very wrong result.  That makes it
clear to me that only [0-9] were assumed by the original authors.


  Commit: 55e09c25cc337bb544b76873f1d2217dbe788ac8
      https://github.com/Perl/perl5/commit/55e09c25cc337bb544b76873f1d2217dbe788ac8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  XXX Time-Piece/Piece.xs: Use isSPACE not isspace

Same msg as prev commit


  Commit: 687fee82eaf1d1a4d7c16eb8dd5c605d522fafa4
      https://github.com/Perl/perl5/commit/687fee82eaf1d1a4d7c16eb8dd5c605d522fafa4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  XXX Time-Piece/Piece.xs: Use isUPPER not isupper

Same msg as prev commit


  Commit: 9664d58ab283045a7c39186ebf65938a10521ed4
      https://github.com/Perl/perl5/commit/9664d58ab283045a7c39186ebf65938a10521ed4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  Time-Piece/Piece.xs: Cleanup missing foldEQ fallback

This changes the code to use foldEQ() if available, and to define foldEQ
in terms of fallbacks if not.  The previous code did not provide a final
fallback.


  Commit: 65a044a3a7c335f6defee48a5851d149906048a3
      https://github.com/Perl/perl5/commit/65a044a3a7c335f6defee48a5851d149906048a3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  more timepiece


  Commit: ca64fdb61098b3dbadb5965087a59ac8a438df2e
      https://github.com/Perl/perl5/commit/ca64fdb61098b3dbadb5965087a59ac8a438df2e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M pod/perlhacktips.pod

  Log Message:
  -----------
  XXX incomplete perlhacktips:


  Commit: 1eae242aad382429b7e723b270a8ab6972938c1d
      https://github.com/Perl/perl5/commit/1eae242aad382429b7e723b270a8ab6972938c1d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M dist/IO/IO.xs

  Log Message:
  -----------
  XXX check if using ppport IO.xs: Remove fallback code furnished by ppport


  Commit: ee25e8ecca77ff0808aa644c6392c47a79028e5e
      https://github.com/Perl/perl5/commit/ee25e8ecca77ff0808aa644c6392c47a79028e5e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M hints/freebsd.sh

  Log Message:
  -----------
  XXX check with freebsd: hints/freebsd.sh


  Commit: bfa543ecff5afe52a483e8c18635ca9c42390dc5
      https://github.com/Perl/perl5/commit/bfa543ecff5afe52a483e8c18635ca9c42390dc5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M thread.h

  Log Message:
  -----------
  thread.ht: White-space, braces only


  Commit: f7304291cf15568a256714a99e276c31c4f36f08
      https://github.com/Perl/perl5/commit/f7304291cf15568a256714a99e276c31c4f36f08
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M thread.h

  Log Message:
  -----------
  XXX thread.h Save errno around lock/unlock


  Commit: 50a40a215b270062c0a61208336d7b5be3875c74
      https://github.com/Perl/perl5/commit/50a40a215b270062c0a61208336d7b5be3875c74
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  XXX perl.h: Debugging mutex lock'


  Commit: ade7693da904fb45f1515345b810348bb146ebd1
      https://github.com/Perl/perl5/commit/ade7693da904fb45f1515345b810348bb146ebd1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M handy.h
    M iperlsys.h
    M locale.c
    M perl.h
    M regen/reentr.pl
    M regexec.c
    M util.c

  Log Message:
  -----------
  Notes


Compare: https://github.com/Perl/perl5/compare/72e5b7dc8285...ade7693da904



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