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[Perl/perl5] 8fbf6a: Add ability to easily add info to DEBUG output

From:
Karl Williamson via perl5-changes
Date:
March 16, 2021 02:11
Subject:
[Perl/perl5] 8fbf6a: Add ability to easily add info to DEBUG output
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/ade769-3a23ab@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: 8fbf6a4c02475d1908d59e6605af77f4f5b3b483
      https://github.com/Perl/perl5/commit/8fbf6a4c02475d1908d59e6605af77f4f5b3b483
  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: 08090a390919297d2987310091dc3143aeb2b24d
      https://github.com/Perl/perl5/commit/08090a390919297d2987310091dc3143aeb2b24d
  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: fe686ff330c87d49c10af55a59615161e7133190
      https://github.com/Perl/perl5/commit/fe686ff330c87d49c10af55a59615161e7133190
  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: ab433ccde96b856935533d0db67b0bdf969b667a
      https://github.com/Perl/perl5/commit/ab433ccde96b856935533d0db67b0bdf969b667a
  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: ad5cb4017c96ab958dd949fa575b8e60d95e72b9
      https://github.com/Perl/perl5/commit/ad5cb4017c96ab958dd949fa575b8e60d95e72b9
  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: a289a5fffeac1539e276b7209e5e3c480c96a878
      https://github.com/Perl/perl5/commit/a289a5fffeac1539e276b7209e5e3c480c96a878
  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: 36a2e8e1fb5770ca4094b06463f9fdb0410451ef
      https://github.com/Perl/perl5/commit/36a2e8e1fb5770ca4094b06463f9fdb0410451ef
  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: 8bf7821c8e8abd9f95c3dcb468dd9fc3883aba36
      https://github.com/Perl/perl5/commit/8bf7821c8e8abd9f95c3dcb468dd9fc3883aba36
  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: 645a9e7d98982f9c14e4c482a9fc8e7a13d85d90
      https://github.com/Perl/perl5/commit/645a9e7d98982f9c14e4c482a9fc8e7a13d85d90
  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: dbf2f08527601f0cc23739309f4b92ddf1ad96f4
      https://github.com/Perl/perl5/commit/dbf2f08527601f0cc23739309f4b92ddf1ad96f4
  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: 9fffdc9c06830dbbbb57db9f24df3330dce23615
      https://github.com/Perl/perl5/commit/9fffdc9c06830dbbbb57db9f24df3330dce23615
  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: 30584c2a30f8d6e25ca49fbde94159ef31f21948
      https://github.com/Perl/perl5/commit/30584c2a30f8d6e25ca49fbde94159ef31f21948
  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: 4f68737ee70aa04c22f43532b02ca1e7e1abc170
      https://github.com/Perl/perl5/commit/4f68737ee70aa04c22f43532b02ca1e7e1abc170
  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: 151f44e69e8b9a69c19f6d89dd3ad355678f5747
      https://github.com/Perl/perl5/commit/151f44e69e8b9a69c19f6d89dd3ad355678f5747
  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: 229e7ac43a9365c3e9f8f7cfa3943d4e473ec400
      https://github.com/Perl/perl5/commit/229e7ac43a9365c3e9f8f7cfa3943d4e473ec400
  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: ed9240419e29e1f510a9ae2a17deae60a16998e6
      https://github.com/Perl/perl5/commit/ed9240419e29e1f510a9ae2a17deae60a16998e6
  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: ec5ce16acb8a4e27c91bcd504ba301120db6f6da
      https://github.com/Perl/perl5/commit/ec5ce16acb8a4e27c91bcd504ba301120db6f6da
  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: 46c9bfa28e7d79b0cf2766ede108234ff7d1ef2b
      https://github.com/Perl/perl5/commit/46c9bfa28e7d79b0cf2766ede108234ff7d1ef2b
  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: 0437d1ee055d3a230c4971dc49b9e945654ca063
      https://github.com/Perl/perl5/commit/0437d1ee055d3a230c4971dc49b9e945654ca063
  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: 3a5a909efc38c68aa837d1b84d4cd316cf3d93c4
      https://github.com/Perl/perl5/commit/3a5a909efc38c68aa837d1b84d4cd316cf3d93c4
  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: 7c7696eacc7ecd51c32316d6f21ecbcd1a7d8593
      https://github.com/Perl/perl5/commit/7c7696eacc7ecd51c32316d6f21ecbcd1a7d8593
  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: 9255bf223264e518dbb0f4a2cdd77cb3c14a7351
      https://github.com/Perl/perl5/commit/9255bf223264e518dbb0f4a2cdd77cb3c14a7351
  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: 1d8d212aca5990e1e237ffd9f70e66c37bb3c81d
      https://github.com/Perl/perl5/commit/1d8d212aca5990e1e237ffd9f70e66c37bb3c81d
  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: 43213e4db0462aedd8045104a90133e1a209c096
      https://github.com/Perl/perl5/commit/43213e4db0462aedd8045104a90133e1a209c096
  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: 82b64b0f1940a169a271ab205a4c8377fc595a5e
      https://github.com/Perl/perl5/commit/82b64b0f1940a169a271ab205a4c8377fc595a5e
  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: 96442dfd6a4cd52bfabdf642c03738b1cbd8017e
      https://github.com/Perl/perl5/commit/96442dfd6a4cd52bfabdf642c03738b1cbd8017e
  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: 6c1ea4920b9f2b91f89a46e4a71bc75a46d56fb8
      https://github.com/Perl/perl5/commit/6c1ea4920b9f2b91f89a46e4a71bc75a46d56fb8
  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: 8680871ca437cadcf788f99b898426e3f36ad10b
      https://github.com/Perl/perl5/commit/8680871ca437cadcf788f99b898426e3f36ad10b
  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: c10010e33fb80cc7cd114fc3e028b1ff683f5689
      https://github.com/Perl/perl5/commit/c10010e33fb80cc7cd114fc3e028b1ff683f5689
  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: a14dba5621bee806c42b69ac778d852042bb6eeb
      https://github.com/Perl/perl5/commit/a14dba5621bee806c42b69ac778d852042bb6eeb
  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: 758d6f2fcdcbabae8e831e91bad24b309b508f5b
      https://github.com/Perl/perl5/commit/758d6f2fcdcbabae8e831e91bad24b309b508f5b
  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: cc06a8c2a99b6b7f59a9d8db3d07edf84b6c14f8
      https://github.com/Perl/perl5/commit/cc06a8c2a99b6b7f59a9d8db3d07edf84b6c14f8
  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: 507f821489a4b92aa1f2266c047c15c98ae34e5b
      https://github.com/Perl/perl5/commit/507f821489a4b92aa1f2266c047c15c98ae34e5b
  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: 26ebe979ad9183be3f0f2591cff077e291f03e04
      https://github.com/Perl/perl5/commit/26ebe979ad9183be3f0f2591cff077e291f03e04
  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: f6292341fb5eea9c3610be0bdb04403c2c044f1a
      https://github.com/Perl/perl5/commit/f6292341fb5eea9c3610be0bdb04403c2c044f1a
  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: 24a5c4280b9b07649443b3a57f6d8f0f546e7869
      https://github.com/Perl/perl5/commit/24a5c4280b9b07649443b3a57f6d8f0f546e7869
  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: 9155c0b6f8fc286680e7d27f2f18778512ae9787
      https://github.com/Perl/perl5/commit/9155c0b6f8fc286680e7d27f2f18778512ae9787
  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: 9f2ab3bb7c27b354e652ccb6f36ab33d564e4daa
      https://github.com/Perl/perl5/commit/9f2ab3bb7c27b354e652ccb6f36ab33d564e4daa
  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: 2d97f71ced558ee54322ceba9476bb80087bd18f
      https://github.com/Perl/perl5/commit/2d97f71ced558ee54322ceba9476bb80087bd18f
  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: 889f807ab316d0b386b6f621d5d707a68789bb96
      https://github.com/Perl/perl5/commit/889f807ab316d0b386b6f621d5d707a68789bb96
  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: c2433650ea3d58bcaecc3d78de1bdd7c3aab623e
      https://github.com/Perl/perl5/commit/c2433650ea3d58bcaecc3d78de1bdd7c3aab623e
  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: 9c9ac2d7accf4ad866cbfb23d9b092a3b079f194
      https://github.com/Perl/perl5/commit/9c9ac2d7accf4ad866cbfb23d9b092a3b079f194
  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: aebafdf30bb47959a6c9f23896185d7b8530ae46
      https://github.com/Perl/perl5/commit/aebafdf30bb47959a6c9f23896185d7b8530ae46
  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: 33513fad672c07ebd9de6d1ef8d4722589ef8ab5
      https://github.com/Perl/perl5/commit/33513fad672c07ebd9de6d1ef8d4722589ef8ab5
  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: 05f6d74f5f10bf005ce0199163484bc245922135
      https://github.com/Perl/perl5/commit/05f6d74f5f10bf005ce0199163484bc245922135
  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: 2fb904b74815c40419b100ea507e3ee3b272b093
      https://github.com/Perl/perl5/commit/2fb904b74815c40419b100ea507e3ee3b272b093
  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: bcb73f9605b8198908649540835b53d3d902e331
      https://github.com/Perl/perl5/commit/bcb73f9605b8198908649540835b53d3d902e331
  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: af6bb8d42ad56d5963311228ae3678121983200f
      https://github.com/Perl/perl5/commit/af6bb8d42ad56d5963311228ae3678121983200f
  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: 8ee72bf0e5f99b56c0f9fc4a4d121089df21a3c1
      https://github.com/Perl/perl5/commit/8ee72bf0e5f99b56c0f9fc4a4d121089df21a3c1
  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: b00dffabf075c243ff02fef99db38855bd5eebb6
      https://github.com/Perl/perl5/commit/b00dffabf075c243ff02fef99db38855bd5eebb6
  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: 6eec22f2f5db1704cf93e72c69b03c2d09ad9351
      https://github.com/Perl/perl5/commit/6eec22f2f5db1704cf93e72c69b03c2d09ad9351
  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: 7307619105f7986627ccc3b305d36c13ea5d4139
      https://github.com/Perl/perl5/commit/7307619105f7986627ccc3b305d36c13ea5d4139
  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: 724ffd19f616f267f5e515fe6c95504963270714
      https://github.com/Perl/perl5/commit/724ffd19f616f267f5e515fe6c95504963270714
  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: 99ee85f56ce2e2568243c1160f4a8a00ac5926bf
      https://github.com/Perl/perl5/commit/99ee85f56ce2e2568243c1160f4a8a00ac5926bf
  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: 031f2815f062351185a65f6feea85bd49ddb3f10
      https://github.com/Perl/perl5/commit/031f2815f062351185a65f6feea85bd49ddb3f10
  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: 9671abbf81fcbcb1e75427c16ab8ec96fa47b29c
      https://github.com/Perl/perl5/commit/9671abbf81fcbcb1e75427c16ab8ec96fa47b29c
  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: 4eb6b72178f83707cf581314a3babf2ad4cbd932
      https://github.com/Perl/perl5/commit/4eb6b72178f83707cf581314a3babf2ad4cbd932
  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: 2e3722e463ff55cb6d11d9b772a56f3f3f25ad8f
      https://github.com/Perl/perl5/commit/2e3722e463ff55cb6d11d9b772a56f3f3f25ad8f
  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: d069c25393e10ee960b6bdda384fb93597de3680
      https://github.com/Perl/perl5/commit/d069c25393e10ee960b6bdda384fb93597de3680
  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: d393e65553ef1d628a6e8804b1577293bf63aa7a
      https://github.com/Perl/perl5/commit/d393e65553ef1d628a6e8804b1577293bf63aa7a
  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: ce20afd947e9b5f201ab564f32217ecece0c6557
      https://github.com/Perl/perl5/commit/ce20afd947e9b5f201ab564f32217ecece0c6557
  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: fb0df81404bd76a4d3b0e2ea2b183ce45406c31e
      https://github.com/Perl/perl5/commit/fb0df81404bd76a4d3b0e2ea2b183ce45406c31e
  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: 3056db8359480d5d05d072cdc6ce2b0683e645cf
      https://github.com/Perl/perl5/commit/3056db8359480d5d05d072cdc6ce2b0683e645cf
  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: de881a12bdb4e6c83b2702cddd7c3790682496cb
      https://github.com/Perl/perl5/commit/de881a12bdb4e6c83b2702cddd7c3790682496cb
  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: 9753e053bebb150e27c9336d4c8e0547cb0cb309
      https://github.com/Perl/perl5/commit/9753e053bebb150e27c9336d4c8e0547cb0cb309
  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: 8f0e981501c9977903b60a76c2c0948c177862a3
      https://github.com/Perl/perl5/commit/8f0e981501c9977903b60a76c2c0948c177862a3
  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: 7fe7c37e79b58aac6627c42c9a4692b34850403d
      https://github.com/Perl/perl5/commit/7fe7c37e79b58aac6627c42c9a4692b34850403d
  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: 027b4afca79f276b9216b1216c35340a98486963
      https://github.com/Perl/perl5/commit/027b4afca79f276b9216b1216c35340a98486963
  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: 7342a64cc137b185ae08b9f1fa9037db50a7161b
      https://github.com/Perl/perl5/commit/7342a64cc137b185ae08b9f1fa9037db50a7161b
  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: fd89c0a38bcfb6c0748a8954d940718a8c386842
      https://github.com/Perl/perl5/commit/fd89c0a38bcfb6c0748a8954d940718a8c386842
  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: 89da41cb9b320ad51a6691289bc951becf0ebc85
      https://github.com/Perl/perl5/commit/89da41cb9b320ad51a6691289bc951becf0ebc85
  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: fc67fa5cdf82472065b405a9c987b3687ce4ff7d
      https://github.com/Perl/perl5/commit/fc67fa5cdf82472065b405a9c987b3687ce4ff7d
  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: a204bb31d806fb7fa1372fe7bd7a2a5963b766da
      https://github.com/Perl/perl5/commit/a204bb31d806fb7fa1372fe7bd7a2a5963b766da
  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: 51aee902458559bf4a38c8cf90a323f643231902
      https://github.com/Perl/perl5/commit/51aee902458559bf4a38c8cf90a323f643231902
  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: 5795db78643610a9c64e59c920848654ecf2171d
      https://github.com/Perl/perl5/commit/5795db78643610a9c64e59c920848654ecf2171d
  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: a90fed0f9465138427984503e7feefec617d573e
      https://github.com/Perl/perl5/commit/a90fed0f9465138427984503e7feefec617d573e
  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: ed3055825cb14348cad0e6a859a379ceaff1e85f
      https://github.com/Perl/perl5/commit/ed3055825cb14348cad0e6a859a379ceaff1e85f
  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: 931f14f3ea7292ca26c371b7bd9bbd1c8f4438d0
      https://github.com/Perl/perl5/commit/931f14f3ea7292ca26c371b7bd9bbd1c8f4438d0
  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: 61b5c6bfb6e80496bbcabcd95f91544b4179edf5
      https://github.com/Perl/perl5/commit/61b5c6bfb6e80496bbcabcd95f91544b4179edf5
  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: 2a399dfab6ad8da542a148f40ff79288e4e4e8a5
      https://github.com/Perl/perl5/commit/2a399dfab6ad8da542a148f40ff79288e4e4e8a5
  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: 301a3c3e1d3eff2763cadbde8482387830898941
      https://github.com/Perl/perl5/commit/301a3c3e1d3eff2763cadbde8482387830898941
  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: fd1dcec70427119cc7d6044c533863e8ba07a78e
      https://github.com/Perl/perl5/commit/fd1dcec70427119cc7d6044c533863e8ba07a78e
  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: cb194cd92baf3e5dc0ca1078a4f78f8370445e35
      https://github.com/Perl/perl5/commit/cb194cd92baf3e5dc0ca1078a4f78f8370445e35
  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: 96210960e8479d5355aebb3e3542414d63b0189c
      https://github.com/Perl/perl5/commit/96210960e8479d5355aebb3e3542414d63b0189c
  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: 28528416265ea2dc24e5e2ee8884d0535a550630
      https://github.com/Perl/perl5/commit/28528416265ea2dc24e5e2ee8884d0535a550630
  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: 0bfde300bd9e0f14af37a8b2a7fc7fa987a63fa2
      https://github.com/Perl/perl5/commit/0bfde300bd9e0f14af37a8b2a7fc7fa987a63fa2
  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: fd72b7f8946ea24e2dbc8f9ae6b472c1123e7464
      https://github.com/Perl/perl5/commit/fd72b7f8946ea24e2dbc8f9ae6b472c1123e7464
  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: 6e2cbd7b589ce668e44767c7d4bc52090d1ce19d
      https://github.com/Perl/perl5/commit/6e2cbd7b589ce668e44767c7d4bc52090d1ce19d
  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: bb092984270d879f0c039178a9ede14905caee71
      https://github.com/Perl/perl5/commit/bb092984270d879f0c039178a9ede14905caee71
  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: 630f3f758eaa114493d973919d5ac54388cd7bb6
      https://github.com/Perl/perl5/commit/630f3f758eaa114493d973919d5ac54388cd7bb6
  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: 1bc291dde49c9f59466c28637cdd71417b81c3a0
      https://github.com/Perl/perl5/commit/1bc291dde49c9f59466c28637cdd71417b81c3a0
  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: 52f03feafc1600fbc05efaa343052fc91d2d4e36
      https://github.com/Perl/perl5/commit/52f03feafc1600fbc05efaa343052fc91d2d4e36
  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: 3d43940e3dbb17d716af094210f2fa5954cd1401
      https://github.com/Perl/perl5/commit/3d43940e3dbb17d716af094210f2fa5954cd1401
  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: 70ca199cb173aa2d89921b3b88f2cb3a86acc04b
      https://github.com/Perl/perl5/commit/70ca199cb173aa2d89921b3b88f2cb3a86acc04b
  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: 4163d321faf41ba8e75d22713428e120131eb697
      https://github.com/Perl/perl5/commit/4163d321faf41ba8e75d22713428e120131eb697
  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: 676115650c592e53585f4904efc7edff6cf048f8
      https://github.com/Perl/perl5/commit/676115650c592e53585f4904efc7edff6cf048f8
  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: 61b6c495ffad24e53837cb1313ae42157c6c2968
      https://github.com/Perl/perl5/commit/61b6c495ffad24e53837cb1313ae42157c6c2968
  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: 8e73219cb8f6406303fd83e63f3472d8977e8cbc
      https://github.com/Perl/perl5/commit/8e73219cb8f6406303fd83e63f3472d8977e8cbc
  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: c46b420ea2c3bccd1410cc5c41277d307cb1e81e
      https://github.com/Perl/perl5/commit/c46b420ea2c3bccd1410cc5c41277d307cb1e81e
  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: 24c5e1b3f643f9a5d6dc87650ab18ad42dd0e885
      https://github.com/Perl/perl5/commit/24c5e1b3f643f9a5d6dc87650ab18ad42dd0e885
  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: 2cbc836f095577fcbbf94bda7da963c54dea3276
      https://github.com/Perl/perl5/commit/2cbc836f095577fcbbf94bda7da963c54dea3276
  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: d77ef8f70db22aea4c907383e55b733e786d7316
      https://github.com/Perl/perl5/commit/d77ef8f70db22aea4c907383e55b733e786d7316
  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: 1ae5b2a4b0001693b930989b4ff587b5283508e7
      https://github.com/Perl/perl5/commit/1ae5b2a4b0001693b930989b4ff587b5283508e7
  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: 10b94636a4050e5c21957c99225636c73f70b911
      https://github.com/Perl/perl5/commit/10b94636a4050e5c21957c99225636c73f70b911
  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: d618f1f211f998be0487a1d8a44817e9e3d004cf
      https://github.com/Perl/perl5/commit/d618f1f211f998be0487a1d8a44817e9e3d004cf
  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: 15f05f3f8b6f038d6fa3c48d7d19579c41b915a4
      https://github.com/Perl/perl5/commit/15f05f3f8b6f038d6fa3c48d7d19579c41b915a4
  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: 8ea318c3d4f93ab6d38152781ce343b854583253
      https://github.com/Perl/perl5/commit/8ea318c3d4f93ab6d38152781ce343b854583253
  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: 839d21d55395b84d5b90d15a0d34fcb7e3db8dda
      https://github.com/Perl/perl5/commit/839d21d55395b84d5b90d15a0d34fcb7e3db8dda
  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: 679c136338bdc6c7bbf710deb43479d1e00a46ca
      https://github.com/Perl/perl5/commit/679c136338bdc6c7bbf710deb43479d1e00a46ca
  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: 212a1ed75a3df5efa41893c50ebe13f347a48902
      https://github.com/Perl/perl5/commit/212a1ed75a3df5efa41893c50ebe13f347a48902
  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: 7cb08cafc0a7b566d12b3524bd2603af31a9e84b
      https://github.com/Perl/perl5/commit/7cb08cafc0a7b566d12b3524bd2603af31a9e84b
  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: 8ed749ac3c89701b89177ebb489671630c6e44eb
      https://github.com/Perl/perl5/commit/8ed749ac3c89701b89177ebb489671630c6e44eb
  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: 0a6a89fe3bed20607d83a6b716910e81d8c1749a
      https://github.com/Perl/perl5/commit/0a6a89fe3bed20607d83a6b716910e81d8c1749a
  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: b0c96f057ac504e68bebf0d856efdddc3d9e5622
      https://github.com/Perl/perl5/commit/b0c96f057ac504e68bebf0d856efdddc3d9e5622
  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: 5c862d04682102badef6f265faf852251dbda4e4
      https://github.com/Perl/perl5/commit/5c862d04682102badef6f265faf852251dbda4e4
  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: a154dbf63efb5aa121e9f1df6d03b2f23bb77f82
      https://github.com/Perl/perl5/commit/a154dbf63efb5aa121e9f1df6d03b2f23bb77f82
  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: 1d5bec12f8a73f19dbec741d82e66e20c1f1f68e
      https://github.com/Perl/perl5/commit/1d5bec12f8a73f19dbec741d82e66e20c1f1f68e
  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: 309c27dff6ba498e3a7429ed7e6cfff7f40dfea1
      https://github.com/Perl/perl5/commit/309c27dff6ba498e3a7429ed7e6cfff7f40dfea1
  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: ef60b97793d650b047bd91c61566ab87e8f0d4b2
      https://github.com/Perl/perl5/commit/ef60b97793d650b047bd91c61566ab87e8f0d4b2
  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: e337be3e9517d1f642b9e21a459aa8518a242ed9
      https://github.com/Perl/perl5/commit/e337be3e9517d1f642b9e21a459aa8518a242ed9
  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: e69ac45de6137184dc20e75c75b54b595ede0642
      https://github.com/Perl/perl5/commit/e69ac45de6137184dc20e75c75b54b595ede0642
  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: 6849db421bb636b986a57c1617c4b5f233ea5cb7
      https://github.com/Perl/perl5/commit/6849db421bb636b986a57c1617c4b5f233ea5cb7
  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: 73531d42fbf43cfe7c6b6fedd3fdb983a2c7794f
      https://github.com/Perl/perl5/commit/73531d42fbf43cfe7c6b6fedd3fdb983a2c7794f
  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: e8b6771c697df6033e7b5b4bbd0b0ac3375cfcfa
      https://github.com/Perl/perl5/commit/e8b6771c697df6033e7b5b4bbd0b0ac3375cfcfa
  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: ad68c216addcbbb5b9f9c1723467394e04f22d26
      https://github.com/Perl/perl5/commit/ad68c216addcbbb5b9f9c1723467394e04f22d26
  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: d2ba9f0d2a48f8ce03423dc67c9197aaa8c59e3b
      https://github.com/Perl/perl5/commit/d2ba9f0d2a48f8ce03423dc67c9197aaa8c59e3b
  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: 68a65fe6cbad533dc669d73024e609fff3dcb8fd
      https://github.com/Perl/perl5/commit/68a65fe6cbad533dc669d73024e609fff3dcb8fd
  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: b77788fc9e38dd44d5eb730ec611ddf4c38e746e
      https://github.com/Perl/perl5/commit/b77788fc9e38dd44d5eb730ec611ddf4c38e746e
  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: 7000cdb70d458fc0d51a4b3fbedc668a28a92f4b
      https://github.com/Perl/perl5/commit/7000cdb70d458fc0d51a4b3fbedc668a28a92f4b
  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: b1a9e52ac28b86faac19a275f9a21eab038a08ab
      https://github.com/Perl/perl5/commit/b1a9e52ac28b86faac19a275f9a21eab038a08ab
  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: 23d94d47822d83c96de9f26cf0c1bd3d70f5621d
      https://github.com/Perl/perl5/commit/23d94d47822d83c96de9f26cf0c1bd3d70f5621d
  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: 70189e78e7f58bd6434398495c94752ef8ec7b6b
      https://github.com/Perl/perl5/commit/70189e78e7f58bd6434398495c94752ef8ec7b6b
  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: 776f03ea83a45d37fbdb54f23c00cbda7db1e8ba
      https://github.com/Perl/perl5/commit/776f03ea83a45d37fbdb54f23c00cbda7db1e8ba
  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: fa3fb31b891bf1b96a27093d90b8f334845e8e13
      https://github.com/Perl/perl5/commit/fa3fb31b891bf1b96a27093d90b8f334845e8e13
  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: 285c26cdfba5261dfa8b2cfb4b002fd8bcda343b
      https://github.com/Perl/perl5/commit/285c26cdfba5261dfa8b2cfb4b002fd8bcda343b
  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: 552e3445ead5b15fd014214dd84677b5be9d1f72
      https://github.com/Perl/perl5/commit/552e3445ead5b15fd014214dd84677b5be9d1f72
  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: cc1ccd71cf4306b9f836eec1235eec460798c7a2
      https://github.com/Perl/perl5/commit/cc1ccd71cf4306b9f836eec1235eec460798c7a2
  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: 323516cd7d7a6241dbd7487279afdddd5896dc50
      https://github.com/Perl/perl5/commit/323516cd7d7a6241dbd7487279afdddd5896dc50
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M cygwin/cygwin.c

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


  Commit: cc3ded452f3ece827bc367d44ae3dbbb8d068ad1
      https://github.com/Perl/perl5/commit/cc3ded452f3ece827bc367d44ae3dbbb8d068ad1
  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: c1c532c34d4a6d8ff7b2e7ef2e06614d123ae174
      https://github.com/Perl/perl5/commit/c1c532c34d4a6d8ff7b2e7ef2e06614d123ae174
  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: 72bbd2a1a0d0b0547a0867024c330e380eeaf88a
      https://github.com/Perl/perl5/commit/72bbd2a1a0d0b0547a0867024c330e380eeaf88a
  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: 7c8954abbf22afaaaff1145da72d6e2e786f8a45
      https://github.com/Perl/perl5/commit/7c8954abbf22afaaaff1145da72d6e2e786f8a45
  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: dd84c78e401b4050599d760c970cfe34340e2d0e
      https://github.com/Perl/perl5/commit/dd84c78e401b4050599d760c970cfe34340e2d0e
  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: 24066cad86bf8392cd7f3dec277d75b6302d7fba
      https://github.com/Perl/perl5/commit/24066cad86bf8392cd7f3dec277d75b6302d7fba
  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: cd4743974be779794b0d93f3eac108963b94d47b
      https://github.com/Perl/perl5/commit/cd4743974be779794b0d93f3eac108963b94d47b
  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: 9f7d104df408ca2f19e1804520654fd314bc4a66
      https://github.com/Perl/perl5/commit/9f7d104df408ca2f19e1804520654fd314bc4a66
  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: bdbfb505cd588f5abee419d56fbca4a5c6a43f72
      https://github.com/Perl/perl5/commit/bdbfb505cd588f5abee419d56fbca4a5c6a43f72
  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: 2338f13ff149eb29be6fcd9debd933dc865c4bb0
      https://github.com/Perl/perl5/commit/2338f13ff149eb29be6fcd9debd933dc865c4bb0
  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: b43f85c6ccbfbd7be3404ab95d674ad0bb65013e
      https://github.com/Perl/perl5/commit/b43f85c6ccbfbd7be3404ab95d674ad0bb65013e
  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: 0e07a74eb6ac44fd33bfbf88f484a0641e9a4263
      https://github.com/Perl/perl5/commit/0e07a74eb6ac44fd33bfbf88f484a0641e9a4263
  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: 5ce7a10df57372fd7b77eb4c7abeb5a7fe7b4013
      https://github.com/Perl/perl5/commit/5ce7a10df57372fd7b77eb4c7abeb5a7fe7b4013
  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: ccf3c8e9b380b9ad7d7c0251f0ac515767f0ff8a
      https://github.com/Perl/perl5/commit/ccf3c8e9b380b9ad7d7c0251f0ac515767f0ff8a
  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: 51d936246bcaf48285cb6917810e477fa37c22b5
      https://github.com/Perl/perl5/commit/51d936246bcaf48285cb6917810e477fa37c22b5
  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: 6c45001b238cf21514cd2c8611ad5237b7094bdc
      https://github.com/Perl/perl5/commit/6c45001b238cf21514cd2c8611ad5237b7094bdc
  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: 80a21ef873877697a9bfbe0827a51ffaee419a99
      https://github.com/Perl/perl5/commit/80a21ef873877697a9bfbe0827a51ffaee419a99
  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: d0bafec662684f6e07dc06576c7823b914980b28
      https://github.com/Perl/perl5/commit/d0bafec662684f6e07dc06576c7823b914980b28
  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: fdec616ed30564bd5814a0fe26bc4c8422df8e19
      https://github.com/Perl/perl5/commit/fdec616ed30564bd5814a0fe26bc4c8422df8e19
  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: 33ce79a80e5c93586a03249b364dedea37f3bf7c
      https://github.com/Perl/perl5/commit/33ce79a80e5c93586a03249b364dedea37f3bf7c
  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: 5d0803586925b79460b0af2293cc6b67b4f3a7bb
      https://github.com/Perl/perl5/commit/5d0803586925b79460b0af2293cc6b67b4f3a7bb
  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: 4abbbf166ba0f6d2844e9c36d16287d7b849a8b8
      https://github.com/Perl/perl5/commit/4abbbf166ba0f6d2844e9c36d16287d7b849a8b8
  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: 8a74dc7f001978ae22bc835c94a7ceef7ac9381b
      https://github.com/Perl/perl5/commit/8a74dc7f001978ae22bc835c94a7ceef7ac9381b
  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: 6858f5f5f68c2e04191f2bcb11d31e0ba738b615
      https://github.com/Perl/perl5/commit/6858f5f5f68c2e04191f2bcb11d31e0ba738b615
  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: cf052e304762d9bf65d8a1a28352197a6ec71198
      https://github.com/Perl/perl5/commit/cf052e304762d9bf65d8a1a28352197a6ec71198
  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: ec048cd22e2c2e8a4d0124154e695d116f720990
      https://github.com/Perl/perl5/commit/ec048cd22e2c2e8a4d0124154e695d116f720990
  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: 2941df65073143c4d15a94ffbe44ab31eddc49ec
      https://github.com/Perl/perl5/commit/2941df65073143c4d15a94ffbe44ab31eddc49ec
  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: 7f25847d7d27194833a21ec62a3cf7fe825c8ec5
      https://github.com/Perl/perl5/commit/7f25847d7d27194833a21ec62a3cf7fe825c8ec5
  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: dff27867b9076882caa6c6c1541490c5994df5ea
      https://github.com/Perl/perl5/commit/dff27867b9076882caa6c6c1541490c5994df5ea
  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: 9c529214fb9f4ed2e5cf8adbb854509c2f9e49f4
      https://github.com/Perl/perl5/commit/9c529214fb9f4ed2e5cf8adbb854509c2f9e49f4
  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: 147dc6aca8d084612c91bc01d8c7be027190d358
      https://github.com/Perl/perl5/commit/147dc6aca8d084612c91bc01d8c7be027190d358
  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: 6016882b8535ebe785fd21819e87db828fdd04ab
      https://github.com/Perl/perl5/commit/6016882b8535ebe785fd21819e87db828fdd04ab
  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: 5f4caddf08834d303f4732e771b9f0e3d0a90421
      https://github.com/Perl/perl5/commit/5f4caddf08834d303f4732e771b9f0e3d0a90421
  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: 9a403deecb4133252a76a844e80027bcba31ea20
      https://github.com/Perl/perl5/commit/9a403deecb4133252a76a844e80027bcba31ea20
  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


  Commit: 3a23ab69b388d83db28ff12cea0223038d084ae6
      https://github.com/Perl/perl5/commit/3a23ab69b388d83db28ff12cea0223038d084ae6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use %z modifier instead of cast

It's better to use a %z modifier than to cast the operand.


Compare: https://github.com/Perl/perl5/compare/ade7693da904...3a23ab69b388



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