develooper Front page | perl.perl5.changes | Postings from May 2021

[Perl/perl5] 19324c: perlapi: Rmv repeated word

From:
Karl Williamson via perl5-changes
Date:
May 3, 2021 01:00
Subject:
[Perl/perl5] 19324c: perlapi: Rmv repeated word
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/43216d-7c74bc@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: 19324cac2c402fcae28b624b235c9b58835efcbf
      https://github.com/Perl/perl5/commit/19324cac2c402fcae28b624b235c9b58835efcbf
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M sv.c

  Log Message:
  -----------
  perlapi: Rmv repeated word


  Commit: e4fa295f1e34b948cf90c4ac805175a43b28dc06
      https://github.com/Perl/perl5/commit/e4fa295f1e34b948cf90c4ac805175a43b28dc06
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M dosish.h
    M unixish.h

  Log Message:
  -----------
  XXX craig 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: f20579ca1fd3a6c000eb3c16bb83fb9c5eebdf12
      https://github.com/Perl/perl5/commit/f20579ca1fd3a6c000eb3c16bb83fb9c5eebdf12
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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 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 duplicate the logic 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: 63df50c4d585cd53a4864cb2d81fca33bc71da27
      https://github.com/Perl/perl5/commit/63df50c4d585cd53a4864cb2d81fca33bc71da27
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 7d310d7553d283f55003083b1703408cb1ea5d1d
      https://github.com/Perl/perl5/commit/7d310d7553d283f55003083b1703408cb1ea5d1d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: e6dc50182dacd5a6e4ceae359e655831fae235de
      https://github.com/Perl/perl5/commit/e6dc50182dacd5a6e4ceae359e655831fae235de
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Change handy.h 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: c76475fa250b85426d2c0e1ae1e08458b95e128f
      https://github.com/Perl/perl5/commit/c76475fa250b85426d2c0e1ae1e08458b95e128f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Remove only 2 calls to an internal macro

Replace isIDFIRST_LC and isWORD_CHAR_LC isIDFIRST_LC  with slightly
faster implementations.


  Commit: 696ce49fb803f7e264d117e91b6ee105d8367833
      https://github.com/Perl/perl5/commit/696ce49fb803f7e264d117e91b6ee105d8367833
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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 isIDFIRST_LC and isWORDCHAR_LC definitions for
non-Windows to match that platform superficially, though expanding to
what it previously did to.


  Commit: f95b8525b86d15c2a0483fde5fb719dd69dba52a
      https://github.com/Perl/perl5/commit/f95b8525b86d15c2a0483fde5fb719dd69dba52a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Add some branch predictions


  Commit: d590952de154e5822dcfbc8bfe5700e270816c8a
      https://github.com/Perl/perl5/commit/d590952de154e5822dcfbc8bfe5700e270816c8a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

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


  Commit: bd299725dd40de599ec779acd214f2192c12dbc9
      https://github.com/Perl/perl5/commit/bd299725dd40de599ec779acd214f2192c12dbc9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Don't use char class if no LC_CTYPE

It is possible to compile perl to not pay attention to LC_CTYPE.  This
was testing for no locales at all; whereas the stricter requirement
should be used.


  Commit: b45ef9caa667fc50a3d2e7fcb79e3d30da81b999
      https://github.com/Perl/perl5/commit/b45ef9caa667fc50a3d2e7fcb79e3d30da81b999
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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 handy.h 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: 25531a1261423ebea26600dde4f7662dc908debf
      https://github.com/Perl/perl5/commit/25531a1261423ebea26600dde4f7662dc908debf
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Rmv internal macro

LC_CAST_ was my attempt at generality, but I didn't realize that the
POSIX standard specifies the type that this was meant to generalize, so
there isn't any need for it.


  Commit: d4915037a143cb157d3df20e6fccf54f3dc60e78
      https://github.com/Perl/perl5/commit/d4915037a143cb157d3df20e6fccf54f3dc60e78
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: a265df8d696b6107f005681ecf11abdc72c54218
      https://github.com/Perl/perl5/commit/a265df8d696b6107f005681ecf11abdc72c54218
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Rmv unnecessary parameter to internal macros

The cast is required to be U8 by the POSIX standard.  There is no need
to have this added generality.


  Commit: 6f4fae1c512d551229da0215e61440dccdb9e0cb
      https://github.com/Perl/perl5/commit/6f4fae1c512d551229da0215e61440dccdb9e0cb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: #define one macro in terms of another

These two macros are equivalent as folding and lowercasing are the same
for this input domain.  Better to say so rather than to replicate the
definitions.


  Commit: 50217ef01d3372d9dc902203c933317d94d95e6d
      https://github.com/Perl/perl5/commit/50217ef01d3372d9dc902203c933317d94d95e6d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  No locales => don't use isspace(), toLower() etc.

This commit changes what happens on platforms without locale handling to
use our precomputed definitions of what the various character class
definitions and case changing operations are.  Previously, it just
called the libc locale-dependent functions and made sure the result was
ASCII.  I think this is a holdover from before we had the precomputed
definitions


  Commit: dd73c90b43a07d86b70f092bfe2ae5ca3d754a70
      https://github.com/Perl/perl5/commit/dd73c90b43a07d86b70f092bfe2ae5ca3d754a70
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Collapse two sets of macros

By redefining a wrapper macro used in one set based on compile-time
info; the other set can be defined in terms of it, and the separate
entries removed.


  Commit: a0ccb6869ca8f69263ed9a47935d6effbcdf1ddd
      https://github.com/Perl/perl5/commit/a0ccb6869ca8f69263ed9a47935d6effbcdf1ddd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Move some macro defns around

This is to make the difference listing in future commits smaller.

This change includes some comment changes, and some extra parens around
some subexpressions


  Commit: e7a17dc03deb51318f81a4dd3ea2a1be3d19c9d5
      https://github.com/Perl/perl5/commit/e7a17dc03deb51318f81a4dd3ea2a1be3d19c9d5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Collapse some macros

These 3 sets of macros can be collapsed trivially into 3 macros.


  Commit: 4c9fe4b4019a21056430d62dacdcd20b2e8b7ec8
      https://github.com/Perl/perl5/commit/4c9fe4b4019a21056430d62dacdcd20b2e8b7ec8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Add wrapper layer macros for isalnum() ...

This adds a new set of macros, forming a lower layer to what is currently
there to wrap the character classification libc functions, isdigit()
etc, and case changing ones, tolower(), toupper().

On most platforms these expand simply to the libc function call.  But on
windows, they expand to something more complex, to bring the Windows
calls into POSIX compliance.  Previously that was achieved at the higher
level, with the result that lower level calls were broken.  This
resulted in parts of the test suite being skipped on Windows.

The current level is rewritten to use the new lower layer, with the
result that it is simpler, as the complexity is now done further down.

I thought about calling these macros is_porcelain_isalnum or something
similar to emphaisze that they are close to the bare libc version, but
thought isU8_alnum() is shorter and conveys another truth, that being
the input is assumed to be a byte, without checking.


  Commit: c2efa00d15a591ceefee1bb314fd7aebe09a6aab
      https://github.com/Perl/perl5/commit/c2efa00d15a591ceefee1bb314fd7aebe09a6aab
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c
    M vms/vms.c

  Log Message:
  -----------
  locale.c: Use new macros from the prev commit

This should result in Windows boxes now passing the locale sanity
checks.  Previously that failure would cause the test suite tests to be
skipped, and warnings generated to Windows users that actually were
invalid, as the flaws were actually compensated for in other code.


  Commit: fe84d57603ed42a48511aac0e557042cc24e1916
      https://github.com/Perl/perl5/commit/fe84d57603ed42a48511aac0e557042cc24e1916
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  XXX SEE IF WORKS handy.h: Change Windows macros


  Commit: c906633a64285a9cd34a43e61b0c9239f8eac4af
      https://github.com/Perl/perl5/commit/c906633a64285a9cd34a43e61b0c9239f8eac4af
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Add isCASED_LC

As a convenience to other code.


  Commit: 8b1321d1dbac31926fce7cb4f55fb09665340d52
      https://github.com/Perl/perl5/commit/8b1321d1dbac31926fce7cb4f55fb09665340d52
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: Improve code

These case statements in a switch all had the same prelude for checking
if the locale is UTF-8 and handling that case separately.  A few commits
ago created macros closer to the base level.  This commit factors out
the common UTF-8 handling, and then puts the lower lever things in the
switch().  Perhaps the C optimizer will be smart enough to do this too,
but we might as well do it ourselves, now that it is convenient.


  Commit: 419a5b554cfc1bc07dc62d417afbf34001050859
      https://github.com/Perl/perl5/commit/419a5b554cfc1bc07dc62d417afbf34001050859
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: Refactor switch default()

It seems clearer to me to have the panic at the end of the routine
instead of as the default: of a switch().


  Commit: 1ea9dcba62be66200c2cf1a0ca2105b569670cba
      https://github.com/Perl/perl5/commit/1ea9dcba62be66200c2cf1a0ca2105b569670cba
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: d04705e3797149037692a621760a2726fd418726
      https://github.com/Perl/perl5/commit/d04705e3797149037692a621760a2726fd418726
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5ddc144b720c2947fcf87eb16f90c79bf4a1746a
      https://github.com/Perl/perl5/commit/5ddc144b720c2947fcf87eb16f90c79bf4a1746a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5fc4cc5615b2d11640673eaff7751976e2bf2269
      https://github.com/Perl/perl5/commit/5fc4cc5615b2d11640673eaff7751976e2bf2269
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 8e74a19ebf6f8a0a222f2e696e3f7437fb38bd5a
      https://github.com/Perl/perl5/commit/8e74a19ebf6f8a0a222f2e696e3f7437fb38bd5a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 2cd3da864a84bbf9e62ff16157bf2978bd122ece
      https://github.com/Perl/perl5/commit/2cd3da864a84bbf9e62ff16157bf2978bd122ece
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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() is the base
level.


  Commit: 0ac3cdf58eaad9fb4c9d7a8f03b0c5d22ca58968
      https://github.com/Perl/perl5/commit/0ac3cdf58eaad9fb4c9d7a8f03b0c5d22ca58968
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: a1f5d8d4f5d3042ded2bd32598607856cad8431f
      https://github.com/Perl/perl5/commit/a1f5d8d4f5d3042ded2bd32598607856cad8431f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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 edges of the locale-handling code; once found the index is used in
future bits of the current operation.


  Commit: 42a641cfcc475fcb1a82237ee8adebaf7bb2c203
      https://github.com/Perl/perl5/commit/42a641cfcc475fcb1a82237ee8adebaf7bb2c203
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 38d44227fd358690da49ca9dd102639a6e4628f5
      https://github.com/Perl/perl5/commit/38d44227fd358690da49ca9dd102639a6e4628f5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 36ce5f38e84065513993ed9873cfdb5e23f7c2ec
      https://github.com/Perl/perl5/commit/36ce5f38e84065513993ed9873cfdb5e23f7c2ec
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5270bdfbd5a46c7fdfc185805c828e488698ae86
      https://github.com/Perl/perl5/commit/5270bdfbd5a46c7fdfc185805c828e488698ae86
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 7c021046709b4ec16009b7189e579169b26e42e1
      https://github.com/Perl/perl5/commit/7c021046709b4ec16009b7189e579169b26e42e1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5ebc13ba594e65a38890016cedb3a296fc05dae1
      https://github.com/Perl/perl5/commit/5ebc13ba594e65a38890016cedb3a296fc05dae1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Move fcn within file

This is for later commits which will change it to rely on new defines
that won't occur until later in the file than its current position


  Commit: ce1cd6e4854d0425396e76aef198df54b519345f
      https://github.com/Perl/perl5/commit/ce1cd6e4854d0425396e76aef198df54b519345f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 4b32546cfdcd671bb77b59803335a37a06e80ee7
      https://github.com/Perl/perl5/commit/4b32546cfdcd671bb77b59803335a37a06e80ee7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Outdent previous commit

The previous commit kept the indentation level the same as it moved code
to a new function, even though an outer block was stripped off in the
process.  This was to minimize diff output.  This commit is white space
only.


  Commit: 5cd53f2e277654a6be73e5870b055bacc061c93d
      https://github.com/Perl/perl5/commit/5cd53f2e277654a6be73e5870b055bacc061c93d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: b3614636a3f659fb9ad1fe45ccf0660936b00ebc
      https://github.com/Perl/perl5/commit/b3614636a3f659fb9ad1fe45ccf0660936b00ebc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: f6fa53e4a82dd2fa4d7b5bee86932b73a896bc70
      https://github.com/Perl/perl5/commit/f6fa53e4a82dd2fa4d7b5bee86932b73a896bc70
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5d52d1ae1f27208ca4240662ab2bfe03a699a6c7
      https://github.com/Perl/perl5/commit/5d52d1ae1f27208ca4240662ab2bfe03a699a6c7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: d398a4333f8f7cc92dd368aaf3a1bea32f962150
      https://github.com/Perl/perl5/commit/d398a4333f8f7cc92dd368aaf3a1bea32f962150
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: f8bc1da407b680183c7c5aa4541a8fd40d34c082
      https://github.com/Perl/perl5/commit/f8bc1da407b680183c7c5aa4541a8fd40d34c082
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: f434d9ca2bc219e3d5d2618740117d65da5b10c8
      https://github.com/Perl/perl5/commit/f434d9ca2bc219e3d5d2618740117d65da5b10c8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 3ea7614056758d82bacf2b01d12a40692806ad41
      https://github.com/Perl/perl5/commit/3ea7614056758d82bacf2b01d12a40692806ad41
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 8eb68be8cb36ba4ddad3588b1ec4b7649d303cc1
      https://github.com/Perl/perl5/commit/8eb68be8cb36ba4ddad3588b1ec4b7649d303cc1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 6db47a65f2b046d8e98f4d677437cbba1ab09b94
      https://github.com/Perl/perl5/commit/6db47a65f2b046d8e98f4d677437cbba1ab09b94
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 87a232029039e9b7910ad3b787bf788bb18e4cee
      https://github.com/Perl/perl5/commit/87a232029039e9b7910ad3b787bf788bb18e4cee
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: f48292b8e17d699c0e3179c766fcbe5d7ceaeb10
      https://github.com/Perl/perl5/commit/f48292b8e17d699c0e3179c766fcbe5d7ceaeb10
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 750eaf0a5d083747635c1fb87f4475926e8ab111
      https://github.com/Perl/perl5/commit/750eaf0a5d083747635c1fb87f4475926e8ab111
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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
use 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: f73a04e8681f83dd2da6399a3e6a776e9ae008be
      https://github.com/Perl/perl5/commit/f73a04e8681f83dd2da6399a3e6a776e9ae008be
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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.  As part of this commit, constness is added to PL_curlocales[]

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: c369b952616e994655ce3c803cf5b3bf7e9d7053
      https://github.com/Perl/perl5/commit/c369b952616e994655ce3c803cf5b3bf7e9d7053
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 48fb0ca27be46b74474aaee5187f53f705468957
      https://github.com/Perl/perl5/commit/48fb0ca27be46b74474aaee5187f53f705468957
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c Make a char * variable const

A future commit will want this


  Commit: 9598a687850dae6e3cdd3a51085e2d479f2f9254
      https://github.com/Perl/perl5/commit/9598a687850dae6e3cdd3a51085e2d479f2f9254
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  locale.c: Generalize stdize_locale()

This function is rewritten to handle LC_ALL, and to make it easier to
add new checks.

There is also a change, which I think is an improvement, in that everything
starting with a \n is trimmed, instead of just a trailing \n being

A couple of calls to stdize_locale() are removed, as they are redundant,
because they are called only as a result of Perl_setlocale() being
called, and that ends up calling stdize_locale always, early on.

The call to savepv() is also moved in a couple cases to after the result
is known to not be NULL

I originally had such a new check in mind, but it turned out that doing
it here didn't solve the problem, so this commit has been amended
(before ever being pushed) to not include that.
chomped.


  Commit: 93833379fd8990eceac9032fb46974c38c2d926f
      https://github.com/Perl/perl5/commit/93833379fd8990eceac9032fb46974c38c2d926f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXX drop stdize_locale: #if 0, enabled even for emulate


  Commit: e044860e3fc03f0601e1653be27eb66f5a23e029
      https://github.com/Perl/perl5/commit/e044860e3fc03f0601e1653be27eb66f5a23e029
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Refactor some derived #defines

The _c suffix is supposed to mean the category is known at compile time.
In some configurations this does not matter, and so I had named things
carelessly, so this might be confusing.  This commit fixes that.


  Commit: f2cf564ff477487634ca18db15ea1070590d5192
      https://github.com/Perl/perl5/commit/f2cf564ff477487634ca18db15ea1070590d5192
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 092fb793d040650589cdfa4d0919f1cd1ea7161f
      https://github.com/Perl/perl5/commit/092fb793d040650589cdfa4d0919f1cd1ea7161f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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 is being 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: 80e5fd652e231221999c2a3122aeee938a630768
      https://github.com/Perl/perl5/commit/80e5fd652e231221999c2a3122aeee938a630768
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 42c0abd3f3442ad190b7e124907f7cfbb9469231
      https://github.com/Perl/perl5/commit/42c0abd3f3442ad190b7e124907f7cfbb9469231
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 712ac81f5853f381517fd47d7082a509a84f5051
      https://github.com/Perl/perl5/commit/712ac81f5853f381517fd47d7082a509a84f5051
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: f32374c8b0be055ab7a876b6ba41181961e2bd84
      https://github.com/Perl/perl5/commit/f32374c8b0be055ab7a876b6ba41181961e2bd84
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: df1aa8e59e71d3b8166d716f1d860b0e246625ee
      https://github.com/Perl/perl5/commit/df1aa8e59e71d3b8166d716f1d860b0e246625ee
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 0516603d0fd04fb74861c811df7871cbc34c0f7a
      https://github.com/Perl/perl5/commit/0516603d0fd04fb74861c811df7871cbc34c0f7a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 3f1eaf4f6ca468debb06ea82a00208ac1987cc00
      https://github.com/Perl/perl5/commit/3f1eaf4f6ca468debb06ea82a00208ac1987cc00
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: bc8d5378d3f79bf40f96ab71239fbc91605468b0
      https://github.com/Perl/perl5/commit/bc8d5378d3f79bf40f96ab71239fbc91605468b0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 6909d67f100e019f60ec9148e6ce1eb1df6f9273
      https://github.com/Perl/perl5/commit/6909d67f100e019f60ec9148e6ce1eb1df6f9273
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: dcc42b18385e9da0e1d5dc9e0a2c964c03faa39b
      https://github.com/Perl/perl5/commit/dcc42b18385e9da0e1d5dc9e0a2c964c03faa39b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  f XXX make fcns accessible to cygwin


  Commit: 18c8b45589238e7229e086a83230943f41e7cce7
      https://github.com/Perl/perl5/commit/18c8b45589238e7229e086a83230943f41e7cce7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 7169daf9bd61aa11320000a7a1ba408d7826ba4d
      https://github.com/Perl/perl5/commit/7169daf9bd61aa11320000a7a1ba408d7826ba4d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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

Properly indent some nested preprocessor directives


  Commit: c963b7038d2b6b4d881d573c1d2ffb3b3cf9e7a4
      https://github.com/Perl/perl5/commit/c963b7038d2b6b4d881d573c1d2ffb3b3cf9e7a4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: b9fe16ba347573ad2e6773b70ff669249f72a421
      https://github.com/Perl/perl5/commit/b9fe16ba347573ad2e6773b70ff669249f72a421
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: ad2da19aea36f69c2644401f5f9c2db0dc9d6c7c
      https://github.com/Perl/perl5/commit/ad2da19aea36f69c2644401f5f9c2db0dc9d6c7c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 62820c71c3cc058a31d0107be180f0508b93ac9f
      https://github.com/Perl/perl5/commit/62820c71c3cc058a31d0107be180f0508b93ac9f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: ddaa2c05b8a6770b86a385cd669dd38f0e31a1ee
      https://github.com/Perl/perl5/commit/ddaa2c05b8a6770b86a385cd669dd38f0e31a1ee
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: ef2374303ea1f5840499b01ff3ba13d217f22d5e
      https://github.com/Perl/perl5/commit/ef2374303ea1f5840499b01ff3ba13d217f22d5e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 555d8f3efc25319e41788b8391c2c40dc37cc917
      https://github.com/Perl/perl5/commit/555d8f3efc25319e41788b8391c2c40dc37cc917
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 3292fe921d1e6f3c771d0649942ec37e1ad436fd
      https://github.com/Perl/perl5/commit/3292fe921d1e6f3c771d0649942ec37e1ad436fd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: a98cc2ff79cf5808bd7db6f37d39d032612db780
      https://github.com/Perl/perl5/commit/a98cc2ff79cf5808bd7db6f37d39d032612db780
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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

This allows some preprocessor conditionals to be removed


  Commit: 927588f0d3b2421e4e26a8f793bde660d178a6cf
      https://github.com/Perl/perl5/commit/927588f0d3b2421e4e26a8f793bde660d178a6cf
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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

strEQ and && already return booleans


  Commit: 36403b84ba8d3a3ba128f4ab3463e4fde8554f38
      https://github.com/Perl/perl5/commit/36403b84ba8d3a3ba128f4ab3463e4fde8554f38
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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 found evidence this guess was wrong, so looked around,
and copied the way cygwin does it.

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


  Commit: dc0bc937263f2869a5360484c21ba4cdbfaba57c
      https://github.com/Perl/perl5/commit/dc0bc937263f2869a5360484c21ba4cdbfaba57c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 410ac05f7ecf44689c80b9d0f2d99a534bacc627
      https://github.com/Perl/perl5/commit/410ac05f7ecf44689c80b9d0f2d99a534bacc627
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: c4e7feb08562df8fd8a84d42d5d57c64f67ca6ca
      https://github.com/Perl/perl5/commit/c4e7feb08562df8fd8a84d42d5d57c64f67ca6ca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 3a0a23f124ddde14559da8e4cc8e15e0dde439a6
      https://github.com/Perl/perl5/commit/3a0a23f124ddde14559da8e4cc8e15e0dde439a6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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 that we aren't already in the desired locale before
changing locales. and does nothing if no change is needed.


  Commit: 902569ced3ee0f949c2fd61bbecf39069d129017
      https://github.com/Perl/perl5/commit/902569ced3ee0f949c2fd61bbecf39069d129017
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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

This is in preparation for the next commit


  Commit: 7f3eb9509a4664a332a3d5669e1a2923f0b0ccb2
      https://github.com/Perl/perl5/commit/7f3eb9509a4664a332a3d5669e1a2923f0b0ccb2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5022613a26eb27ac1ff0ce1ecd63b065b634c272
      https://github.com/Perl/perl5/commit/5022613a26eb27ac1ff0ce1ecd63b065b634c272
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 90b998f0b5a427af413783e2f7fdb09831dd623e
      https://github.com/Perl/perl5/commit/90b998f0b5a427af413783e2f7fdb09831dd623e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: faaf8fad19788e99b595701b860766d5239955c5
      https://github.com/Perl/perl5/commit/faaf8fad19788e99b595701b860766d5239955c5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: b7c8b93ac2377a3d5e83f7dbaa510acf4260c3c6
      https://github.com/Perl/perl5/commit/b7c8b93ac2377a3d5e83f7dbaa510acf4260c3c6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Add toggle_locale() fcns

These are designed to temporarily switch the locale for a cateogry
around some operation that needs it to be different than the current
one.  They will be used in the next commit.

These will eventually replace the more unwieldy
_is_cur_LC_category_utf8() function, which toggles as a side effect


  Commit: 7657537a3323db23ae0529a7bbc46872b1058154
      https://github.com/Perl/perl5/commit/7657537a3323db23ae0529a7bbc46872b1058154
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 25b9616d9c544b424888e0c7bc08815f4203d3b7
      https://github.com/Perl/perl5/commit/25b9616d9c544b424888e0c7bc08815f4203d3b7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: b6a5f7e9411c2812438e1349ca386a4e923db294
      https://github.com/Perl/perl5/commit/b6a5f7e9411c2812438e1349ca386a4e923db294
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 7d61ecf2670b1b91441269941adf8852cc2c9766
      https://github.com/Perl/perl5/commit/7d61ecf2670b1b91441269941adf8852cc2c9766
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 8a4d4d7a9139df5404f6201af5c0ece01d05b5fc
      https://github.com/Perl/perl5/commit/8a4d4d7a9139df5404f6201af5c0ece01d05b5fc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: localeconv() unconditional NUMERIC toggle

It is possible to lockout changing the LC_NUMERIC locale.  This is done
in some printf cases where a recursive call could get the radix
character wrong.  But localeconv(), which could be called during this
recursion on some platforms, toggles the locale briefly, without
affecting the surrounding calls; so it can do the toggle
unconditionally.

The previous commit merely moved the functionality of localeconv() from
POSIX.xs to locale.c.  This commit expands upon that.


  Commit: 2affe91362cb649546045402b1b21cdbdeb5ea45
      https://github.com/Perl/perl5/commit/2affe91362cb649546045402b1b21cdbdeb5ea45
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 7ce227ac96aa96c85885cf32b33e93ca577ffa29
      https://github.com/Perl/perl5/commit/7ce227ac96aa96c85885cf32b33e93ca577ffa29
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: ffd05466f5d92a7dc861c90d1266abc1f86a1307
      https://github.com/Perl/perl5/commit/ffd05466f5d92a7dc861c90d1266abc1f86a1307
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 6d1c35c668dacbac96bac9fecc991bda8b81645a
      https://github.com/Perl/perl5/commit/6d1c35c668dacbac96bac9fecc991bda8b81645a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: e641ba4130fff91f380332e65343921cdc5d9af4
      https://github.com/Perl/perl5/commit/e641ba4130fff91f380332e65343921cdc5d9af4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: e080580ec89f977513fc80f74881668338156382
      https://github.com/Perl/perl5/commit/e080580ec89f977513fc80f74881668338156382
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 6eb946e73f933f3d538f0812946c6590f3cdad2d
      https://github.com/Perl/perl5/commit/6eb946e73f933f3d538f0812946c6590f3cdad2d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: 1bf4601463157240e5dbe79e297e3cad72f8185f
      https://github.com/Perl/perl5/commit/1bf4601463157240e5dbe79e297e3cad72f8185f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 39c8b23232ef686508a531a9da1e8a7db3695895
      https://github.com/Perl/perl5/commit/39c8b23232ef686508a531a9da1e8a7db3695895
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: cd53e1a0ebc2de0ab7aebe65d77a0b128c608377
      https://github.com/Perl/perl5/commit/cd53e1a0ebc2de0ab7aebe65d77a0b128c608377
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 212865ec1ab7265fb80089ba0f8eca7abc213288
      https://github.com/Perl/perl5/commit/212865ec1ab7265fb80089ba0f8eca7abc213288
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M mg.c

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

Indent newly formed block from the previous commit.


  Commit: 884222afe43de0c5e1160428c38200786e0ed934
      https://github.com/Perl/perl5/commit/884222afe43de0c5e1160428c38200786e0ed934
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: a2f3c4e23a28dc16b6d54b06546601aee550ad0d
      https://github.com/Perl/perl5/commit/a2f3c4e23a28dc16b6d54b06546601aee550ad0d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 1244368278154a21b069cf47e8056b2e3f86ca73
      https://github.com/Perl/perl5/commit/1244368278154a21b069cf47e8056b2e3f86ca73
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: b197b5e0838e60287e2c040a264af661b64f1ea1
      https://github.com/Perl/perl5/commit/b197b5e0838e60287e2c040a264af661b64f1ea1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: b8e6b90815cd18e26ca1b79889742105efb726ed
      https://github.com/Perl/perl5/commit/b8e6b90815cd18e26ca1b79889742105efb726ed
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 439135f870295530a6e24f101a0e5482ba2aa640
      https://github.com/Perl/perl5/commit/439135f870295530a6e24f101a0e5482ba2aa640
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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

This commit also skips doing S_newctype() if the new boss is the same as
the old


  Commit: 96f15a3ca900195529f2ab90e025f7ad9a06e78e
      https://github.com/Perl/perl5/commit/96f15a3ca900195529f2ab90e025f7ad9a06e78e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 50ebb0fe01fc2e0fe7b79d94dc7ffd8a199e1d5a
      https://github.com/Perl/perl5/commit/50ebb0fe01fc2e0fe7b79d94dc7ffd8a199e1d5a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 0133363db8c41b2dd8328b6f04472405ed7f4420
      https://github.com/Perl/perl5/commit/0133363db8c41b2dd8328b6f04472405ed7f4420
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 0e40b1d4683ddcb5299cd68a521c288c33522aa0
      https://github.com/Perl/perl5/commit/0e40b1d4683ddcb5299cd68a521c288c33522aa0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 45fbc4d91f2954fbe6b284b377e0f7e9a3f112a9
      https://github.com/Perl/perl5/commit/45fbc4d91f2954fbe6b284b377e0f7e9a3f112a9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: 3e0718bc11fc1101f21566fea1ecc523ce751ba5
      https://github.com/Perl/perl5/commit/3e0718bc11fc1101f21566fea1ecc523ce751ba5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 1364643b85008117a0b78db0e787c7e1f5ea9eb5
      https://github.com/Perl/perl5/commit/1364643b85008117a0b78db0e787c7e1f5ea9eb5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 43f873ea7fec365c898a202cecd8aecf2195013d
      https://github.com/Perl/perl5/commit/43f873ea7fec365c898a202cecd8aecf2195013d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: aea7fdb4bf2ea81ed8dadc47a45c0e60a92810e4
      https://github.com/Perl/perl5/commit/aea7fdb4bf2ea81ed8dadc47a45c0e60a92810e4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  locale.c: Rmv unused code

The code to handle changing LC_NUMERIC and LC_COLLATION handled the
possibility of being passed a NULL locale name.  But we're not changing
things unless we have a new locale, and know its name, so a name is
always passed


  Commit: 4f01db2fac892bec63f301ab6cb29e752ee28e19
      https://github.com/Perl/perl5/commit/4f01db2fac892bec63f301ab6cb29e752ee28e19
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Rmv unnecessary savepv()

This moves the savepv() down in the function, after we know we need it.


  Commit: 3e41ad1e20edfa19998b1e3305bfd79f911e00e0
      https://github.com/Perl/perl5/commit/3e41ad1e20edfa19998b1e3305bfd79f911e00e0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Mv line of code later in fcn

This avoids setting this until needed.


  Commit: 68217df4d2536c1c7890db8fecc92aea2078b0f9
      https://github.com/Perl/perl5/commit/68217df4d2536c1c7890db8fecc92aea2078b0f9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Skip code if will be a no-op

The previous commits have fixed things up so that at this point in the
code nothing has changed, and if nothing will change, we can just return


  Commit: b79bf07a103fa69c7ae9decfc12c39021dcae2ff
      https://github.com/Perl/perl5/commit/b79bf07a103fa69c7ae9decfc12c39021dcae2ff
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Specially handle the trivial case

When setting the numeric radix character, and the locale is C or POSIX,
we know it's going to be a dot without having to look further.  All the
ancillary info is also known.  So save time and just set these all and
return.


  Commit: 18bf6cae68053917d77d0ec4db06427c36eb8231
      https://github.com/Perl/perl5/commit/18bf6cae68053917d77d0ec4db06427c36eb8231
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M intrpvar.h
    M numeric.c

  Log Message:
  -----------
  numeric.c, intrpvar.h: Rmv outdated condition, comment

It hasn't been true for some releases that the SV was removed when the
radix was a dot.  Instead the SV contains the correct decimal point
character at all times.


  Commit: f2262dba4c074695919fe6b78fca8eb124b0d84b
      https://github.com/Perl/perl5/commit/f2262dba4c074695919fe6b78fca8eb124b0d84b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Swap setting related variables

It is clearer to use the variable more directly related to what is being
set; then set the more distantly related onve, than vice versa


  Commit: 0ed0f1589eaa8ba933247ec65bf1f2926a8dbbbb
      https://github.com/Perl/perl5/commit/0ed0f1589eaa8ba933247ec65bf1f2926a8dbbbb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Rmv special case

At this point in the code, we know we are already switched into the
underlying numeric locale; there's no need to further check to see if
switching is necessary.


  Commit: 7644bcc9019638dd6c4663930ef747441844061e
      https://github.com/Perl/perl5/commit/7644bcc9019638dd6c4663930ef747441844061e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  locale.c: Save underlying radix character

When changing locales the new decimal point needs to be calculated.
This commit creates a new per-interpreter variable to save that
calculation, so it only has to be done when a new locale is set; prior
to this commit it was recalculated each time it was needed.

The calculation is still performed twice when the new locale is switched
into.  But the redundant calculation will be removed in a couple of
commits hence.


  Commit: bd0bdac9998ee58766a59124d160cb3b2e0d47c7
      https://github.com/Perl/perl5/commit/bd0bdac9998ee58766a59124d160cb3b2e0d47c7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Move debug stmt to earlier in fcn


  Commit: 132054934be90938d3c72ea212e1905a6ea9d62d
      https://github.com/Perl/perl5/commit/132054934be90938d3c72ea212e1905a6ea9d62d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  locale.c: Rmv S_set_numeric_radix()

Previous commits have made this function much smaller, and its branches
can be easily absorbed into the callers, with clearer code, and in fact
removal of a redundant calculation of the locale's radix character,
promised in a previous commit's message


  Commit: e44951687244d04db9370e7e40d4b3294cfc76a1
      https://github.com/Perl/perl5/commit/e44951687244d04db9370e7e40d4b3294cfc76a1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXXfinish commit msg locale.c: Rmv some special cases

The previous commits have allowed the removal of special casing of
making sure the


  Commit: 518a10b144da4d2de97248bd0494e5a435ffcb0c
      https://github.com/Perl/perl5/commit/518a10b144da4d2de97248bd0494e5a435ffcb0c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: 1c5d340db306bb13c3e39ec3983705479fe1ba61
      https://github.com/Perl/perl5/commit/1c5d340db306bb13c3e39ec3983705479fe1ba61
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: dec910bd7563c4f6a9c4bc71dd20fd077b5f25bd
      https://github.com/Perl/perl5/commit/dec910bd7563c4f6a9c4bc71dd20fd077b5f25bd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: a46784058c78152dda5debb581e85ba645e26cd0
      https://github.com/Perl/perl5/commit/a46784058c78152dda5debb581e85ba645e26cd0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 174cb212060e961f3275532dc826ef90c2cb9b25
      https://github.com/Perl/perl5/commit/174cb212060e961f3275532dc826ef90c2cb9b25
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 7b2ee6d0b53caa8b62c85910d338fa752fd0e533
      https://github.com/Perl/perl5/commit/7b2ee6d0b53caa8b62c85910d338fa752fd0e533
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 232ae96fc4570e919ae9712ef2eb20400930ea33
      https://github.com/Perl/perl5/commit/232ae96fc4570e919ae9712ef2eb20400930ea33
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M lib/locale.t

  Log Message:
  -----------
  XXX temp: lib/locale.t: debug


  Commit: 34df37faf29051f864407967ab43b11619c90299
      https://github.com/Perl/perl5/commit/34df37faf29051f864407967ab43b11619c90299
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 89de518d68dc9b7ccda15b01d13c1113877fab60
      https://github.com/Perl/perl5/commit/89de518d68dc9b7ccda15b01d13c1113877fab60
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 4782be1d4392faacc0642d22e14915b9d797dc02
      https://github.com/Perl/perl5/commit/4782be1d4392faacc0642d22e14915b9d797dc02
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: eb1f0414201cc51b7d87bdfb47ff3707df90ffb2
      https://github.com/Perl/perl5/commit/eb1f0414201cc51b7d87bdfb47ff3707df90ffb2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 1c10525b44be5e9756b9c0b32c8a0eb3eb065ff1
      https://github.com/Perl/perl5/commit/1c10525b44be5e9756b9c0b32c8a0eb3eb065ff1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 18049b3515195d15a35c134c9435f8789f4d51cb
      https://github.com/Perl/perl5/commit/18049b3515195d15a35c134c9435f8789f4d51cb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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

Hex is the more familiar form


  Commit: e2fcff75572709c9dc2170aeb853d487a1cd6634
      https://github.com/Perl/perl5/commit/e2fcff75572709c9dc2170aeb853d487a1cd6634
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: a3cb39adb0b0d87d26372cdfdad082bfba760559
      https://github.com/Perl/perl5/commit/a3cb39adb0b0d87d26372cdfdad082bfba760559
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 87e2999bfa029f3b385d24f2e243178b2ef983cc
      https://github.com/Perl/perl5/commit/87e2999bfa029f3b385d24f2e243178b2ef983cc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Reorder cpp branches

Disposing of the trivial case first makes things easier to read.


  Commit: 846c0d0115cf603c786510485c9c5d152545b6c0
      https://github.com/Perl/perl5/commit/846c0d0115cf603c786510485c9c5d152545b6c0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 0e97602660ef41725aca4de2abd3861fa446810a
      https://github.com/Perl/perl5/commit/0e97602660ef41725aca4de2abd3861fa446810a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: efe0a00461dbcf7d4766abc2d3d223feb40b05a1
      https://github.com/Perl/perl5/commit/efe0a00461dbcf7d4766abc2d3d223feb40b05a1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 05928a3b5a967d518dcdc07779567039dc52c12d
      https://github.com/Perl/perl5/commit/05928a3b5a967d518dcdc07779567039dc52c12d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: cc373467b4f43ceeed33b62dc0ea6f643a65e34f
      https://github.com/Perl/perl5/commit/cc373467b4f43ceeed33b62dc0ea6f643a65e34f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 3d6ef9542ca613db28c0873ef0b59ca4141238af
      https://github.com/Perl/perl5/commit/3d6ef9542ca613db28c0873ef0b59ca4141238af
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: cc42e8d6e724a37b5a14b2c860b124b614e57cf0
      https://github.com/Perl/perl5/commit/cc42e8d6e724a37b5a14b2c860b124b614e57cf0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  XXX perlembed 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 setlocales 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: 13fd37f0e3f2eebaf823569c62656d12698c8188
      https://github.com/Perl/perl5/commit/13fd37f0e3f2eebaf823569c62656d12698c8188
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

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

This simplifies slightly, and will allow further simplification


  Commit: 340430b527da657d17f9efa30d410a942ea1581d
      https://github.com/Perl/perl5/commit/340430b527da657d17f9efa30d410a942ea1581d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

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

To enable future simplifications


  Commit: 1ac0677c6da17d22f2134c3826deffa3f4bba9e8
      https://github.com/Perl/perl5/commit/1ac0677c6da17d22f2134c3826deffa3f4bba9e8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: c7cc1516135730ec268f8e6d7fd99f13ffaecfb1
      https://github.com/Perl/perl5/commit/c7cc1516135730ec268f8e6d7fd99f13ffaecfb1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 649a98eb5b1aa91880afcdd6625e9d775c480230
      https://github.com/Perl/perl5/commit/649a98eb5b1aa91880afcdd6625e9d775c480230
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 885b9dfb7cc2209081bd1eb5c0da83baeb97584a
      https://github.com/Perl/perl5/commit/885b9dfb7cc2209081bd1eb5c0da83baeb97584a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M pp.c

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


  Commit: 474aef853c5652648a45c20d5c26074c8882cc3c
      https://github.com/Perl/perl5/commit/474aef853c5652648a45c20d5c26074c8882cc3c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Make fc(), /i thread-safe on participating platforms

A long standing bug in Perl that has gone undetected is that the array
is global that is created when changing locales and tells fc() and qr//i
matching what the folds are in the new locale.

What this means is that any program only has one set of fold definitions
that apply to all threads within it, even if we claim that the locales
are thread-safe on the given platform.  One possibility for this going
undetected so long is that no one is using locales on multi-threaded
systems much.  Another possibility is that modern UTF-8 locales have the
same set of folds as any other one.

It is a simple matter to make the fold array per-thread instead of
per-process, and that solves the problem transparently to other code.

I discovered this stress-testing locale handling under threads.  That
test will be added in a future commit.


  Commit: f003f19262e8ed8c07ffdc99d6571243b6077e57
      https://github.com/Perl/perl5/commit/f003f19262e8ed8c07ffdc99d6571243b6077e57
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M inline.h
    M locale.c

  Log Message:
  -----------
  locale.c/inline.h: Add fold calc debug statements

Under verbose debugging, this shows non-standard folds


  Commit: 9c86b2249bfe6e3a3381ced4c78d74d661f9187b
      https://github.com/Perl/perl5/commit/9c86b2249bfe6e3a3381ced4c78d74d661f9187b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: 9eacdd5e159eb45ad74b55417e77ead65078f1a3
      https://github.com/Perl/perl5/commit/9eacdd5e159eb45ad74b55417e77ead65078f1a3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: 92faa17e00cb1921e25304bc1e27b2aff35ed7ec
      https://github.com/Perl/perl5/commit/92faa17e00cb1921e25304bc1e27b2aff35ed7ec
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 75bc980074eca32ac828ee28fb135e260df9efca
      https://github.com/Perl/perl5/commit/75bc980074eca32ac828ee28fb135e260df9efca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 3cad44f5ab07cc315ea5748f9123be5a7856d857
      https://github.com/Perl/perl5/commit/3cad44f5ab07cc315ea5748f9123be5a7856d857
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 75e8e2cf19e0159e2453da064cf8b78d4ec8ed49
      https://github.com/Perl/perl5/commit/75e8e2cf19e0159e2453da064cf8b78d4ec8ed49
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

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

So they are closer to related statements


  Commit: 9bc1d1bb041bc7186642a23ad1a1a18ae3a08345
      https://github.com/Perl/perl5/commit/9bc1d1bb041bc7186642a23ad1a1a18ae3a08345
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5c9876795bbbb7cf4f749df15447135cd0f75383
      https://github.com/Perl/perl5/commit/5c9876795bbbb7cf4f749df15447135cd0f75383
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 1c7c5f1edad07e3ec40e194f8937ba83bca3bb30
      https://github.com/Perl/perl5/commit/1c7c5f1edad07e3ec40e194f8937ba83bca3bb30
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M pp_sys.c

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


  Commit: f0eb4af62d4eba9f679c2ec2e1eaaea8c731ad7a
      https://github.com/Perl/perl5/commit/f0eb4af62d4eba9f679c2ec2e1eaaea8c731ad7a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M win32/win32.c

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

These could have races.


  Commit: ec08830c9eda2d9e58653bd57ce52106cca39907
      https://github.com/Perl/perl5/commit/ec08830c9eda2d9e58653bd57ce52106cca39907
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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


  Commit: 6ca7281ede2afcef4ccda52dd13b96bf97d74924
      https://github.com/Perl/perl5/commit/6ca7281ede2afcef4ccda52dd13b96bf97d74924
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M util.c

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

per the Posix standard


  Commit: 3d929fc2b56778bb9c0c4e1534fef446b2162a98
      https://github.com/Perl/perl5/commit/3d929fc2b56778bb9c0c4e1534fef446b2162a98
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M util.c

  Log Message:
  -----------
  util.c: Add locks around strftime() calls


  Commit: f69c9c13737458883f7e05c1338efe79cb53a92c
      https://github.com/Perl/perl5/commit/f69c9c13737458883f7e05c1338efe79cb53a92c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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: 5188ba6387fcb6dc784883e1e2757dd3c14d46ca
      https://github.com/Perl/perl5/commit/5188ba6387fcb6dc784883e1e2757dd3c14d46ca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

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

This add mutex locking around some unsafe thread operations to make this
module thread-safe.


  Commit: bd2810c7bd40786ffdcd073356cff33582094da7
      https://github.com/Perl/perl5/commit/bd2810c7bd40786ffdcd073356cff33582094da7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Time-Piece: Use foldEQ_locale() if available

This supported core function is thread-safe and knows about Perl
internals, so is preferable to the similar libc function, which is now
used only as a fallback.  This commit also bomb proofs the code by
adding an additional fallback, specified in C89, which isn't a great
substituted, but far better than nothing.


  Commit: 76371427a9ff226c579545b5c790c05a08f0a218
      https://github.com/Perl/perl5/commit/76371427a9ff226c579545b5c790c05a08f0a218
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Time-Piece: Use isSPACE, not isspace

The latter gives results that are dependent on the program's underlying
locale, and so may be inconsistent.

If locale dependence is actually desired, isSPACE_LC should be used, as
it knows about various things the module writer shouldn't have to
concern themselves with.  It is supported since 5.004


  Commit: cfcd8f9390283ea8eb351a21416c00ca19917f86
      https://github.com/Perl/perl5/commit/cfcd8f9390283ea8eb351a21416c00ca19917f86
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Time-Piece: Use isDIGIT, not isdigit

The latter gives results that are dependent on the program's underlying
locale, and so may be inconsistent.

If locale dependence is actually desired, isDIGIT_LC should be used, as
it knows about various things the module writer shouldn't have to
concern themselves with.  It is supported since 5.004


  Commit: 96ef39fde0eb248e0a503596777d39b915c88560
      https://github.com/Perl/perl5/commit/96ef39fde0eb248e0a503596777d39b915c88560
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Time-Piece: Use isUPPER, not isupper

The latter gives results that are dependent on the program's underlying
locale, and so may be inconsistent.

If locale dependence is actually desired, isUPPER_LC should be used, as
it knows about various things the module writer shouldn't have to
concern themselves with.  It is supported since 5.004


  Commit: 095abda6213dac0797084a31e862261e971d7f0c
      https://github.com/Perl/perl5/commit/095abda6213dac0797084a31e862261e971d7f0c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M pod/perlhacktips.pod

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


  Commit: 34b31e56e7301102093c04df99134ffb3e3f22c9
      https://github.com/Perl/perl5/commit/34b31e56e7301102093c04df99134ffb3e3f22c9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M dist/IO/IO.pm
    M dist/IO/IO.xs

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


  Commit: 2c52e0d309d1d5b317ae4c164c81990254189977
      https://github.com/Perl/perl5/commit/2c52e0d309d1d5b317ae4c164c81990254189977
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M hints/freebsd.sh

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


  Commit: 03f5253864e2a442d53a07fe01b0d577a069a554
      https://github.com/Perl/perl5/commit/03f5253864e2a442d53a07fe01b0d577a069a554
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M thread.h

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


  Commit: 25bc23b3b9b4f67b80ff046a06f5eba8216d1c00
      https://github.com/Perl/perl5/commit/25bc23b3b9b4f67b80ff046a06f5eba8216d1c00
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M thread.h

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


  Commit: c3214f1313ee7a14f5e4a4d6f77934ab4f8a42f4
      https://github.com/Perl/perl5/commit/c3214f1313ee7a14f5e4a4d6f77934ab4f8a42f4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

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


  Commit: 78b0a8546ff21938b14358916d82ae421ded7b45
      https://github.com/Perl/perl5/commit/78b0a8546ff21938b14358916d82ae421ded7b45
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  locks


  Commit: 2c52f5b74c67f84faf8e88d8933aadfd3f8007ce
      https://github.com/Perl/perl5/commit/2c52f5b74c67f84faf8e88d8933aadfd3f8007ce
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXX locale.c: Kludge because C obj getting destroyed


  Commit: 9936f597b7241983950652c539f61339b0d01b89
      https://github.com/Perl/perl5/commit/9936f597b7241983950652c539f61339b0d01b89
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M .github/workflows/testsuite.yml

  Log Message:
  -----------
  Make DEBUGGING the default on CI


  Commit: 62f98d0d7a9d3395add6b97f0fab271688115d20
      https://github.com/Perl/perl5/commit/62f98d0d7a9d3395add6b97f0fab271688115d20
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/run/locale.t

  Log Message:
  -----------
  t/run/locale.t: Move init stmt

This makes it easier to add a line to turn on debugging temporarily


  Commit: 243b86d9fdbc0ee6f87ccf69176085318b2d7433
      https://github.com/Perl/perl5/commit/243b86d9fdbc0ee6f87ccf69176085318b2d7433
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/run/locale.t

  Log Message:
  -----------
  XXX run/locale.t temp debug


  Commit: 456f755433cc06003ee7881bfe6444082de789f4
      https://github.com/Perl/perl5/commit/456f755433cc06003ee7881bfe6444082de789f4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/porting/customized.dat
    M vutil.c

  Log Message:
  -----------
  vutil.c: Clean up white space

Change tabs to blanks; Fix indentation; chomp trailing white space

Remove some blank lines that don't contribute to readability


  Commit: 28edf7e40e9a6498e01d830f3421b812d41b9ae7
      https://github.com/Perl/perl5/commit/28edf7e40e9a6498e01d830f3421b812d41b9ae7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/porting/customized.dat
    M vutil.c

  Log Message:
  -----------
  vutil.c: Simplify locale handling

I read the code over and realized that there was a much simpler way to
do things.


  Commit: 1d506450c705b8c27d61472541619bf66fb9acf4
      https://github.com/Perl/perl5/commit/1d506450c705b8c27d61472541619bf66fb9acf4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Change a branch into an assert

This code should no longer be necessary; but verify


  Commit: eb8ac7550ad8841930f61ec301df952f5e734831
      https://github.com/Perl/perl5/commit/eb8ac7550ad8841930f61ec301df952f5e734831
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  Add pTHX to locale_thread_init()


  Commit: f77cce97ce3db67facca7bb54a1fc8e3f25b7c3c
      https://github.com/Perl/perl5/commit/f77cce97ce3db67facca7bb54a1fc8e3f25b7c3c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  l


  Commit: de2d3877090ededf4b3a078bd87d1d4491944141
      https://github.com/Perl/perl5/commit/de2d3877090ededf4b3a078bd87d1d4491944141
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M locale.c
    M sv.c

  Log Message:
  -----------
  PLcurlocales


  Commit: 0f90842bc35362b139ca17d37dc1bc966b4174ae
      https://github.com/Perl/perl5/commit/0f90842bc35362b139ca17d37dc1bc966b4174ae
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M locale.c
    M sv.c

  Log Message:
  -----------
  Revert "PLcurlocales"

This reverts commit cd1fd76eac05b9ca866bb6f1dae6151767aa3d76.


  Commit: 96c5a135ed13ac16104c59404a01c4672da54d53
      https://github.com/Perl/perl5/commit/96c5a135ed13ac16104c59404a01c4672da54d53
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M lib/locale.t

  Log Message:
  -----------
  lib/locale.t FILE debug


  Commit: c363a0054669e002450926d416a0b4c80c28a4c9
      https://github.com/Perl/perl5/commit/c363a0054669e002450926d416a0b4c80c28a4c9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: windows DEBUG stmts


  Commit: c6bd84fe1969aed7ac0b0803d4689fa37cb0c577
      https://github.com/Perl/perl5/commit/c6bd84fe1969aed7ac0b0803d4689fa37cb0c577
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M embed.fnc
    M proto.h

  Log Message:
  -----------
  f save_to_buffer ignore return


  Commit: 6e5bf5e2614124a3c6c1143a403b43c0ce4f8eb9
      https://github.com/Perl/perl5/commit/6e5bf5e2614124a3c6c1143a403b43c0ce4f8eb9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Add layer for char classification/case change

This layer currently expands to just the layer below it, but that will
be changed in a future commit.


  Commit: 1995febe84c6dbb2084f40b043e3ffb118711d75
      https://github.com/Perl/perl5/commit/1995febe84c6dbb2084f40b043e3ffb118711d75
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

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


  Commit: 1e3e3128a52d632fa08f41f7911bb99eabf3ebad
      https://github.com/Perl/perl5/commit/1e3e3128a52d632fa08f41f7911bb99eabf3ebad
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  XXX Temp dont use querylocale()


  Commit: f648406a8e65e658e098d85eff3515a5d1394579
      https://github.com/Perl/perl5/commit/f648406a8e65e658e098d85eff3515a5d1394579
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  l


  Commit: 2cc9f2d1e0f3ebea917edb76be0829c1b0e42f17
      https://github.com/Perl/perl5/commit/2cc9f2d1e0f3ebea917edb76be0829c1b0e42f17
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M intrpvar.h

  Log Message:
  -----------
  intrpvar.h: Swap position of two defns; add comment


  Commit: 507b03e949950ee24bbd2832b7bbb338b81ab244
      https://github.com/Perl/perl5/commit/507b03e949950ee24bbd2832b7bbb338b81ab244
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M intrpvar.h
    M locale.c

  Log Message:
  -----------
  locale.c: Add 'Lazy' location changing

When comparing two strings for order under 'use locale', one can call
strcoll() which creates hidden modified versions of the strings based on
the locale's collation ordering, does the comparison, and then throws
away the modified versions.

Or one can call strxfrm() to create a non-hidden modified version of
each string, and then do a straight comparison.  The advantage here is
that you are in control of when to discard the modified version, and the
(expensive) transformation is done just once, no matter how many times a
comparison is done.

Perl assumes that a string will be compared multiple times, so the first
time it happens under 'use locale', strxfrm() is called, and the
modified string is attached via magic to the SV.  The modified string is
discarded if the string changes, or is recomputed if the locale has
changed since the computation was done.

The transformation generally occupies some multiple of size of the
original string.  Memory must be allocated to hold it.  For any given
locale, the amount is predictable for all strings, roughly via a linear
equation "mx+b", where x is the size of the original string.  By
computing 'm' and 'b' once, Perl can allocate enough memory to hold the
transformation, but not too much.  (m and b are adjusted up as necessary
as more strings get transformed.)  This minimizes mallocs.

But the calculation of m and b is somewhat expensive, and only necessary
if the program actually does a string compare under 'use locale'.

This commit defers the calculation until needed.  It does the bare
minimum of changes accomplish this.  The next commit will rearrange
things.


  Commit: 6e1b5cf66f830668a75cf003f2fb51cb8d7a4264
      https://github.com/Perl/perl5/commit/6e1b5cf66f830668a75cf003f2fb51cb8d7a4264
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Move code, white-space, comment only

This moves the function created in the previous commit to a more logical
place in the file; just before its only call.  It also removes nested
blocks that are no longer necessary.


  Commit: 6e425ca4871c212d3626443674ff7ea2ff6a601e
      https://github.com/Perl/perl5/commit/6e425ca4871c212d3626443674ff7ea2ff6a601e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c
    M util.c

  Log Message:
  -----------
  XXX Configure strftime() is C89

We can assume it exists


  Commit: cfcf7a008db30946f066b1091dbc843f6530c58c
      https://github.com/Perl/perl5/commit/cfcf7a008db30946f066b1091dbc843f6530c58c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h
    M sv.c

  Log Message:
  -----------
  perl.h: Change macro name to be C conformant

Leading underscores in names are undefined


  Commit: 41bc06fdf217083cb19dcf91f8a91b22efca8d5a
      https://github.com/Perl/perl5/commit/41bc06fdf217083cb19dcf91f8a91b22efca8d5a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M patchlevel.h

  Log Message:
  -----------
  patchlevel.h: White-space only: properly indent


  Commit: 33a50d74b555af052dd2132f98788ccd80d1a3b8
      https://github.com/Perl/perl5/commit/33a50d74b555af052dd2132f98788ccd80d1a3b8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M sv.c

  Log Message:
  -----------
  sv.c: Comments white-space only


  Commit: bb3d0041826b1507e37bdd53bf3cd145cf49aec7
      https://github.com/Perl/perl5/commit/bb3d0041826b1507e37bdd53bf3cd145cf49aec7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M makedef.pl

  Log Message:
  -----------
  makedef.pl: Rmv obsolete symbol

This routine is now a static function, so needn't be in makedef.pl


  Commit: 35f261fee232cda5a9d50ef5f5d9b01402bc9975
      https://github.com/Perl/perl5/commit/35f261fee232cda5a9d50ef5f5d9b01402bc9975
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  locale.c: Refactor internal debugging function

setlocale_debug_string() variants  now use Perl_form, a function I
didn't know existed when I originally wrote this code.


  Commit: 1fd8d1c6bd1eb02d0e789e22807a9fbde4c4d734
      https://github.com/Perl/perl5/commit/1fd8d1c6bd1eb02d0e789e22807a9fbde4c4d734
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  locale.c: Add a fcn to display LC_ALL

This is trivial on a platform that has LC_ALL, but requires extra work
on platforms that don't.


  Commit: 3edcfab25def5742df123d09ffebcce75274d6ec
      https://github.com/Perl/perl5/commit/3edcfab25def5742df123d09ffebcce75274d6ec
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add debugging check

If we run across the REPLACEMENT CHARACTER, its likely a mismatch
between LC_CTYPE and another category.  This panics on debugging builds.


  Commit: 23aa166d04780f40905dd405e001f35acbe3f50e
      https://github.com/Perl/perl5/commit/23aa166d04780f40905dd405e001f35acbe3f50e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Initialize variables to avoid runtime check

Initializing them means we no longer have to tess that they are non-NULL
each time they are accessed.


  Commit: ee64ac539fa222b3f7f1958242b48e224362902f
      https://github.com/Perl/perl5/commit/ee64ac539fa222b3f7f1958242b48e224362902f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Initialize PL_underlying_numeric_obj

This probably doesn't matter, but it's better form to initialize it to a
sane value.


  Commit: 4f63d571377bb563d83dc4c9d23519fee40e6b03
      https://github.com/Perl/perl5/commit/4f63d571377bb563d83dc4c9d23519fee40e6b03
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: Print better failing test numbers

This test module is 'required' from other perl test files.  If it
encounters an error, it doesn't know how to report it.  What it does is
call fail() if available, and a home-grown one otherwise.  Prior to this
commit the home-grown version just made all tests number 0.  This commit
changes that to make them sequentially numbered from a very high
starting one, so as not to interfere with the outer calls.


  Commit: 378aeac1c8937b3484873b363f5a954cdae302e1
      https://github.com/Perl/perl5/commit/378aeac1c8937b3484873b363f5a954cdae302e1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M cygwin/cygwin.c

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


  Commit: ec8ec19841c2457277d3a99108e7a5768506ecc1
      https://github.com/Perl/perl5/commit/ec8ec19841c2457277d3a99108e7a5768506ecc1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M patchlevel.h

  Log Message:
  -----------
  Kludge to get cygwin to compile


  Commit: d8efb85d524fb249d8345ae65cbd9807276fa797
      https://github.com/Perl/perl5/commit/d8efb85d524fb249d8345ae65cbd9807276fa797
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M cygwin/cygwin.c

  Log Message:
  -----------
  cygwin use fcns


  Commit: 062ca0f9165852784f6d87f2bb64042731a5fb53
      https://github.com/Perl/perl5/commit/062ca0f9165852784f6d87f2bb64042731a5fb53
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M cygwin/cygwin.c

  Log Message:
  -----------
  Revert "cygwin use fcns"

This reverts commit 24fbf2ccd8777c4af31eb9f8038d4cff7073b0c4.


  Commit: 9f7184e4f0bce96d2efaf8729e9aa4b1fd47c91a
      https://github.com/Perl/perl5/commit/9f7184e4f0bce96d2efaf8729e9aa4b1fd47c91a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: Refactor _trylocale()

This function is used to see if a locale actually works on the current
platform.  I was not fully aware of the glitches if a category is in one
locale, and LC_CTYPE is in another.  This makes sure they are both the
same; and this results in some simplification.


  Commit: cdc6d8cbe94ba884b8443d1252c6eb110d418c90
      https://github.com/Perl/perl5/commit/cdc6d8cbe94ba884b8443d1252c6eb110d418c90
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: Fail earlier

Move the code that returns failure into the loop, so won't keep
iterating if failure is going to happen anyway.


  Commit: df78d63b142c65a68b8f00bf5deabeb75fb5dc3d
      https://github.com/Perl/perl5/commit/df78d63b142c65a68b8f00bf5deabeb75fb5dc3d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: Add checks

This verifies that we can restore a locale that we were previously in,
and makes sure that we don't stay in a locale that doesn't work well.
Doing so has led to crashes.


  Commit: 419b996721ea7a550a2112723582aebbf88a6b6f
      https://github.com/Perl/perl5/commit/419b996721ea7a550a2112723582aebbf88a6b6f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: Don't allow commas in locale names

This was a problem in some buggy Windows versions.  This addition keeps
locales with this bug from being tested.


  Commit: 6eb24557dd00f95ef958bb4f64ef980ef7f0d966
      https://github.com/Perl/perl5/commit/6eb24557dd00f95ef958bb4f64ef980ef7f0d966
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: Check for unsupported locales

This commit causes us not to view unsupported locales as legitimate for
testing.  Core dumps occurred on some platforms without this.

It looks for a diagnostic that the next commit in this series will
generate.


  Commit: cf9f645e07702c9ff6390e82cbf98d59b711aa45
      https://github.com/Perl/perl5/commit/cf9f645e07702c9ff6390e82cbf98d59b711aa45
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

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

  Log Message:
  -----------
  XXXdelta Add locale unsupported test

Perl only suppots multi-byte locales that are UTF-8.  It turns out that
the others are worse than I thought, and if someone switches to one, the
program can crash.

This commit generates a default-on diagnostic when switching into such a
locale, and doesn't take the steps to add its data to the LC_CTYPE
database.

The check has been done in various releases for some time, but this
elevates its severity and tries to avoid actually using its data.

The previous commit caused the test suite to view such a locale as
unacceptable.


  Commit: adb3ccdbd2af64e960a93210bdff623b54afb1c7
      https://github.com/Perl/perl5/commit/adb3ccdbd2af64e960a93210bdff623b54afb1c7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: White-space only


  Commit: a619489cf248540037157712d48d1f9234a9dac7
      https://github.com/Perl/perl5/commit/a619489cf248540037157712d48d1f9234a9dac7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  XXX t/loc_tools.pl: Temp debug


  Commit: fccfc616d91f4f4127537f7f8ace12f505238d47
      https://github.com/Perl/perl5/commit/fccfc616d91f4f4127537f7f8ace12f505238d47
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  t/loc_tools.pl: Swap lines

It doesn't matter much, but some warnings might be output by doing the
'use locale' before turning off warnings.


  Commit: be4b65704ddd688beea66a3edc30ec28467a93a3
      https://github.com/Perl/perl5/commit/be4b65704ddd688beea66a3edc30ec28467a93a3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M lib/locale_threads.t

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


  Commit: 5d1e2ae040152b40be291e7fabcb70c892154276
      https://github.com/Perl/perl5/commit/5d1e2ae040152b40be291e7fabcb70c892154276
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M lib/locale_threads.t

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


  Commit: 4cb81140798e5d21aa43186c9ac0e58e47e5f010
      https://github.com/Perl/perl5/commit/4cb81140798e5d21aa43186c9ac0e58e47e5f010
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M intrpvar.h

  Log Message:
  -----------
  intrpvar.h: White space only


  Commit: 67c3bf004de4658a910b320b51563137262d22e0
      https://github.com/Perl/perl5/commit/67c3bf004de4658a910b320b51563137262d22e0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M intrpvar.h

  Log Message:
  -----------
  intrpvar.h: Move some defns into appropriate #ifdefs


  Commit: 63cdb6560f91b389130f6a20efb9aafb2aa0eeb3
      https://github.com/Perl/perl5/commit/63cdb6560f91b389130f6a20efb9aafb2aa0eeb3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 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:
  -----------
  XXX finish msg,thread_init Revamp sync_locale, switch_to_global_locale

f


  Commit: 3586ac3434fa9c342e02c27eccdb4cd8eb9b8357
      https://github.com/Perl/perl5/commit/3586ac3434fa9c342e02c27eccdb4cd8eb9b8357
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M sv.c

  Log Message:
  -----------
  sv.c: Rmv duplicate clones

These variables are already cloned when creating a thread


  Commit: 7bd92b5d1779811a4830c468f3f836fa37cec4a7
      https://github.com/Perl/perl5/commit/7bd92b5d1779811a4830c468f3f836fa37cec4a7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M sv.c

  Log Message:
  -----------
  sv.c: Rmv redundant clause

If threaded locales are being used, basic locales are too.  No need to
check both


  Commit: 7c397fe71a9bbb402f112fe773a384521d604fbc
      https://github.com/Perl/perl5/commit/7c397fe71a9bbb402f112fe773a384521d604fbc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h
    M lib/locale.t

  Log Message:
  -----------
  Fix isspace() handling on AIX

This box incorrectly thinks the NBSP is a graphic on many locales.
Overriding that makes these locales behave like proper POSIX ones.


  Commit: 4ab6cca12043040db60b8db04556c46f7a863ede
      https://github.com/Perl/perl5/commit/4ab6cca12043040db60b8db04556c46f7a863ede
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M sv.c

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

Replace leading tabs with spaces


  Commit: ed51e8db61764233c9d583e4ec96def6a2b02c57
      https://github.com/Perl/perl5/commit/ed51e8db61764233c9d583e4ec96def6a2b02c57
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M hints/cygwin.sh

  Log Message:
  -----------
  XXX check if really necessary after everything: Don't use POSIX 2008 locale

This has been found to be buggy leading to dying inside the newlocale()
in S_emulate_setlocale_i()


  Commit: b07ffd98456ffb5fe5f4f482c4b4c38de864c64f
      https://github.com/Perl/perl5/commit/b07ffd98456ffb5fe5f4f482c4b4c38de864c64f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M lib/locale.t

  Log Message:
  -----------
  lib/locale.t: Use I18N::Langinfo, not POSIX::localeconv()

Now that Langinfo is ported to every box, it requires less work than
localeconv(), and offers more choices.  This commit changes to use it,
and for more info when debugging, gets some additional info from it.


  Commit: 44fc495c42c561ff312fbe6da33e1ccca809681d
      https://github.com/Perl/perl5/commit/44fc495c42c561ff312fbe6da33e1ccca809681d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  XXX cygwin debugging small macro buf


  Commit: 1a12abf4855ced75afe8d39e2e46ecb68aa972ab
      https://github.com/Perl/perl5/commit/1a12abf4855ced75afe8d39e2e46ecb68aa972ab
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Avoid unnecessary calls to set_numeric_standard()

Prior to this commit, set_numeric_standard() was called unconditionally,
and it could decide if it should do anything or not.  But the variable
that indicates this is available to the caller, so by testing it, it can
avoid the call, which is most likely the case.


  Commit: 59776fed8035f8fb037c6f370ad60758ba3a08e7
      https://github.com/Perl/perl5/commit/59776fed8035f8fb037c6f370ad60758ba3a08e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  XXX perl.h: Debugging trace across all files


  Commit: e4c117188119ef668b94fecc8516f315c273b681
      https://github.com/Perl/perl5/commit/e4c117188119ef668b94fecc8516f315c273b681
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  XXX Use internal querylocale on Linux

XXX Need to bisect to see where this goes bad
XXX Is effectively a no-op due to other debugging code


  Commit: 6cd7cbdf80ab68fe4c2eeb84ab1f06d4e64c3a14
      https://github.com/Perl/perl5/commit/6cd7cbdf80ab68fe4c2eeb84ab1f06d4e64c3a14
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs
    M dist/ExtUtils-ParseXS/lib/perlxs.pod
    M handy.h
    M iperlsys.h
    M locale.c
    M perl.h
    M pod/perllocale.pod
    M regen/reentr.pl
    M regexec.c
    M util.c

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


  Commit: 7c74bc82f1c286d17e6a48ef2a9441a4da2078c5
      https://github.com/Perl/perl5/commit/7c74bc82f1c286d17e6a48ef2a9441a4da2078c5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M embedvar.h
    M ext/I18N-Langinfo/t/Langinfo.t
    M ext/POSIX/POSIX.xs
    M intrpvar.h
    M lib/locale.t
    M lib/locale_threads.t
    M locale.c
    M mg.c
    M perl.c
    M perl.h
    M proto.h
    M regexec.c
    M sv.c
    M t/loc_tools.pl
    M t/run/locale.t

  Log Message:
  -----------
  53


Compare: https://github.com/Perl/perl5/compare/43216d696fc0...7c74bc82f1c2



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