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[Perl/perl5] 74d946: perlapi: Rmv repeated word

From:
Karl Williamson via perl5-changes
Date:
May 3, 2021 03:57
Subject:
[Perl/perl5] 74d946: perlapi: Rmv repeated word
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/7c74bc-292f90@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: 74d94633b9113e64e5da5f3452a580122f045bcb
      https://github.com/Perl/perl5/commit/74d94633b9113e64e5da5f3452a580122f045bcb
  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: bd125091377978ec7f9f39b34ca113fe4b7d4803
      https://github.com/Perl/perl5/commit/bd125091377978ec7f9f39b34ca113fe4b7d4803
  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: 64c6c1d02db104fd2d571e5aece0592a50c16134
      https://github.com/Perl/perl5/commit/64c6c1d02db104fd2d571e5aece0592a50c16134
  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: e61a650a3be05169ea9d97c73dadaf5f01cbfc53
      https://github.com/Perl/perl5/commit/e61a650a3be05169ea9d97c73dadaf5f01cbfc53
  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: 7b9daa01caa44be0d468ede0b7c6b66e55804e43
      https://github.com/Perl/perl5/commit/7b9daa01caa44be0d468ede0b7c6b66e55804e43
  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: 9ebb18be5cce8c30e2aeae99530b2834d209a6cf
      https://github.com/Perl/perl5/commit/9ebb18be5cce8c30e2aeae99530b2834d209a6cf
  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: 5be462216ce132669a63f8dcb3ca9f487fe97d17
      https://github.com/Perl/perl5/commit/5be462216ce132669a63f8dcb3ca9f487fe97d17
  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: 6afdddf9e6678c49b871ffb258194477b1781a25
      https://github.com/Perl/perl5/commit/6afdddf9e6678c49b871ffb258194477b1781a25
  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: 0f323fb6c46b82401ad3638383f1ea9a0b29bc14
      https://github.com/Perl/perl5/commit/0f323fb6c46b82401ad3638383f1ea9a0b29bc14
  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: 70e7ae69d21549f038ce4cf0a30f886388f181f6
      https://github.com/Perl/perl5/commit/70e7ae69d21549f038ce4cf0a30f886388f181f6
  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: f36c3d2e0bb733254ec28934d3fbe593a998f9ae
      https://github.com/Perl/perl5/commit/f36c3d2e0bb733254ec28934d3fbe593a998f9ae
  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: 5ee6e5223912b70f06d53f2b3e0c20fc8d771175
      https://github.com/Perl/perl5/commit/5ee6e5223912b70f06d53f2b3e0c20fc8d771175
  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: da2fcceb86703e4a042cfc71f24c05f15e61c5ee
      https://github.com/Perl/perl5/commit/da2fcceb86703e4a042cfc71f24c05f15e61c5ee
  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: fbf9cb246bce627e0f27a6b49cb8b578909b2b78
      https://github.com/Perl/perl5/commit/fbf9cb246bce627e0f27a6b49cb8b578909b2b78
  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: 05846d7d3ed8f82dcae2745e07873312fc67b2f8
      https://github.com/Perl/perl5/commit/05846d7d3ed8f82dcae2745e07873312fc67b2f8
  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: e8193d2df297e68c2912e5f09712ffe040400640
      https://github.com/Perl/perl5/commit/e8193d2df297e68c2912e5f09712ffe040400640
  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: e9156fe38232da084b951274e263b4dceff01698
      https://github.com/Perl/perl5/commit/e9156fe38232da084b951274e263b4dceff01698
  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: 62e90e421fcef6114473ed0538cd950481ef77db
      https://github.com/Perl/perl5/commit/62e90e421fcef6114473ed0538cd950481ef77db
  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: 5d82f7c134767f7966b4e7360920ebced51d7a30
      https://github.com/Perl/perl5/commit/5d82f7c134767f7966b4e7360920ebced51d7a30
  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: bd3c203ad76df60634b4f9f606078ddbb038f2e9
      https://github.com/Perl/perl5/commit/bd3c203ad76df60634b4f9f606078ddbb038f2e9
  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: 85bba6b4b8e87a1623431b7fa2a5d123b2f7f7d0
      https://github.com/Perl/perl5/commit/85bba6b4b8e87a1623431b7fa2a5d123b2f7f7d0
  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: 56a9f05bf9a753023176cd8b285a6b97cf349895
      https://github.com/Perl/perl5/commit/56a9f05bf9a753023176cd8b285a6b97cf349895
  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: 2d3d571c634b34eb4481276adee56bd1d56d4221
      https://github.com/Perl/perl5/commit/2d3d571c634b34eb4481276adee56bd1d56d4221
  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: fbf0527ec718094fe39caf1ba94cc09c81bbed73
      https://github.com/Perl/perl5/commit/fbf0527ec718094fe39caf1ba94cc09c81bbed73
  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: 776c86d2684cbd36ca24ac5467a5ec74d1b16acc
      https://github.com/Perl/perl5/commit/776c86d2684cbd36ca24ac5467a5ec74d1b16acc
  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: bf809be61d0ba334b8ca95999b2b1608ad750f97
      https://github.com/Perl/perl5/commit/bf809be61d0ba334b8ca95999b2b1608ad750f97
  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: a37a79f7821716ab1155f0c070941b18773f6671
      https://github.com/Perl/perl5/commit/a37a79f7821716ab1155f0c070941b18773f6671
  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: 2f0ec9c642d6f432e3720e207f8e15159c1205c2
      https://github.com/Perl/perl5/commit/2f0ec9c642d6f432e3720e207f8e15159c1205c2
  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: b56cec9a0581681c7fc0cb7558dc1eadc33da7df
      https://github.com/Perl/perl5/commit/b56cec9a0581681c7fc0cb7558dc1eadc33da7df
  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: 069e1690870950dff40fda4aa166c29a428d2742
      https://github.com/Perl/perl5/commit/069e1690870950dff40fda4aa166c29a428d2742
  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: eaad902494c3a88d862a337314c98bd2e6c68683
      https://github.com/Perl/perl5/commit/eaad902494c3a88d862a337314c98bd2e6c68683
  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: 8b2da83dd48a708955236a7495de44bdbdbcfbf6
      https://github.com/Perl/perl5/commit/8b2da83dd48a708955236a7495de44bdbdbcfbf6
  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: 6cfb7f248741719dd7cf6cbe2697c7a54ed5e7fb
      https://github.com/Perl/perl5/commit/6cfb7f248741719dd7cf6cbe2697c7a54ed5e7fb
  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: 435b881e8f86e4443698e53e729f43298b5e3a78
      https://github.com/Perl/perl5/commit/435b881e8f86e4443698e53e729f43298b5e3a78
  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: d88ad0e1ce489d41a143eb74ec043203ca8da69e
      https://github.com/Perl/perl5/commit/d88ad0e1ce489d41a143eb74ec043203ca8da69e
  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: d8394ae8d5b42c0d519438e99011595288e491ab
      https://github.com/Perl/perl5/commit/d8394ae8d5b42c0d519438e99011595288e491ab
  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: 44919b6748e10b58ef518aa0653dd7b59cfee229
      https://github.com/Perl/perl5/commit/44919b6748e10b58ef518aa0653dd7b59cfee229
  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: ed958ca2dafb2d69e839f2728c3de016c82a9927
      https://github.com/Perl/perl5/commit/ed958ca2dafb2d69e839f2728c3de016c82a9927
  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: 81922746d01ad92ed69ee02891d4a774008c7293
      https://github.com/Perl/perl5/commit/81922746d01ad92ed69ee02891d4a774008c7293
  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: b92b10450abf66f1897718c0d1b73298da694cd5
      https://github.com/Perl/perl5/commit/b92b10450abf66f1897718c0d1b73298da694cd5
  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: 38dc3fc6d0fc7789f08178e2e40cf6d98ecb3869
      https://github.com/Perl/perl5/commit/38dc3fc6d0fc7789f08178e2e40cf6d98ecb3869
  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: 920fb032fc82aa71b64211db621b715b1aa04064
      https://github.com/Perl/perl5/commit/920fb032fc82aa71b64211db621b715b1aa04064
  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: 392c211a6efb0bef8269d2b498247853eeaaa5c4
      https://github.com/Perl/perl5/commit/392c211a6efb0bef8269d2b498247853eeaaa5c4
  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: 90321244127855a2e370041c3bb1e6277c278f9b
      https://github.com/Perl/perl5/commit/90321244127855a2e370041c3bb1e6277c278f9b
  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: f5cc27bf397db25a0b49ac72a6d081f0bb489c59
      https://github.com/Perl/perl5/commit/f5cc27bf397db25a0b49ac72a6d081f0bb489c59
  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: 9750a3f8b42d05a8039b14164275e06806a54c4f
      https://github.com/Perl/perl5/commit/9750a3f8b42d05a8039b14164275e06806a54c4f
  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: 98325c61163d4e58c759f001d2d64c8744de9abc
      https://github.com/Perl/perl5/commit/98325c61163d4e58c759f001d2d64c8744de9abc
  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: 34bc03cd37c637f340a9448ed5004c37a84014f5
      https://github.com/Perl/perl5/commit/34bc03cd37c637f340a9448ed5004c37a84014f5
  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: 7a958234ffaaab6862b8305129daeb43acfe72c3
      https://github.com/Perl/perl5/commit/7a958234ffaaab6862b8305129daeb43acfe72c3
  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: 24e517f3e7b76ecfb083ca7fc2a1c204a3fad9d3
      https://github.com/Perl/perl5/commit/24e517f3e7b76ecfb083ca7fc2a1c204a3fad9d3
  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: bc33ead20b0c84a5a5b0c3a4f79388f004371216
      https://github.com/Perl/perl5/commit/bc33ead20b0c84a5a5b0c3a4f79388f004371216
  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: a26a1af354182750c9510d9edfd286ef3956b534
      https://github.com/Perl/perl5/commit/a26a1af354182750c9510d9edfd286ef3956b534
  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: b8e60d74487d706475b567be6a5e0fae8a4238e8
      https://github.com/Perl/perl5/commit/b8e60d74487d706475b567be6a5e0fae8a4238e8
  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: 266b63ae0deaa0d55bd8c1f9ebbc4d36f825bcd9
      https://github.com/Perl/perl5/commit/266b63ae0deaa0d55bd8c1f9ebbc4d36f825bcd9
  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: 2b6248633eb6ca485522016d26016c3d30d37d28
      https://github.com/Perl/perl5/commit/2b6248633eb6ca485522016d26016c3d30d37d28
  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: 0bef9fc551021df3273b4073c0eb85409d567c81
      https://github.com/Perl/perl5/commit/0bef9fc551021df3273b4073c0eb85409d567c81
  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: c7bcad64c6f633ca063bcbbb21928d0ab79c553f
      https://github.com/Perl/perl5/commit/c7bcad64c6f633ca063bcbbb21928d0ab79c553f
  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: ab7bc9a189f0cd4ad7aab01ede637d3bc54edafa
      https://github.com/Perl/perl5/commit/ab7bc9a189f0cd4ad7aab01ede637d3bc54edafa
  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: cd1be453551e466463ea56df379d6d76c8497ee7
      https://github.com/Perl/perl5/commit/cd1be453551e466463ea56df379d6d76c8497ee7
  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: 92e49964b5fe497daf4b6e8ba071c7e572ecda95
      https://github.com/Perl/perl5/commit/92e49964b5fe497daf4b6e8ba071c7e572ecda95
  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: d809f9cbd5588a22d316b6045ec478cdaf27b616
      https://github.com/Perl/perl5/commit/d809f9cbd5588a22d316b6045ec478cdaf27b616
  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: e9b22d5b81b70ad4a7a774cc22d79f2dac6db21b
      https://github.com/Perl/perl5/commit/e9b22d5b81b70ad4a7a774cc22d79f2dac6db21b
  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: 7e6dd5109bd706fd133982cf3cfacf712ccbb4a8
      https://github.com/Perl/perl5/commit/7e6dd5109bd706fd133982cf3cfacf712ccbb4a8
  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: 05882e95351bc72ca0b7ddfe4725e36566297bf7
      https://github.com/Perl/perl5/commit/05882e95351bc72ca0b7ddfe4725e36566297bf7
  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: 97452b91e49f51276969fa6cf2711c0a0d3f84b8
      https://github.com/Perl/perl5/commit/97452b91e49f51276969fa6cf2711c0a0d3f84b8
  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: 962a129a84fdd56f132c9a4e7020f02ec7c32c0c
      https://github.com/Perl/perl5/commit/962a129a84fdd56f132c9a4e7020f02ec7c32c0c
  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: 265373d9ccd7bb9401f28a46cc0ba5e0ac589711
      https://github.com/Perl/perl5/commit/265373d9ccd7bb9401f28a46cc0ba5e0ac589711
  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: cf449b91587c368921f7fe645fe165807aa13e8b
      https://github.com/Perl/perl5/commit/cf449b91587c368921f7fe645fe165807aa13e8b
  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: 3c11efc539e2edbf2262a7270d59d62ef4367e5a
      https://github.com/Perl/perl5/commit/3c11efc539e2edbf2262a7270d59d62ef4367e5a
  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: c84ec794b2ae130ec1e2e38e09ad232395b28d7b
      https://github.com/Perl/perl5/commit/c84ec794b2ae130ec1e2e38e09ad232395b28d7b
  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: df4d4cc3e783c46b4d4ccdc1ed0f6afc27675d3f
      https://github.com/Perl/perl5/commit/df4d4cc3e783c46b4d4ccdc1ed0f6afc27675d3f
  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: 4c6d1555a1cca352eb8333cb0b50d697550c27dc
      https://github.com/Perl/perl5/commit/4c6d1555a1cca352eb8333cb0b50d697550c27dc
  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: 468542e552c5b0523abe6b6f336f46c0339bea92
      https://github.com/Perl/perl5/commit/468542e552c5b0523abe6b6f336f46c0339bea92
  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: 178d5c616f32ea36a627fa990606388a4c29d1b6
      https://github.com/Perl/perl5/commit/178d5c616f32ea36a627fa990606388a4c29d1b6
  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: 2a29de05944aa0a8cf60befca28742343cd360f6
      https://github.com/Perl/perl5/commit/2a29de05944aa0a8cf60befca28742343cd360f6
  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: ed1dbf93d186c1551967bcdeb8ce679a1c2ee5b3
      https://github.com/Perl/perl5/commit/ed1dbf93d186c1551967bcdeb8ce679a1c2ee5b3
  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: 24d77c8b13c040d93f1b057ef9ef6a642f96690f
      https://github.com/Perl/perl5/commit/24d77c8b13c040d93f1b057ef9ef6a642f96690f
  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: d22fddf75c8aa6ba1b54a8659cc08d93def09a16
      https://github.com/Perl/perl5/commit/d22fddf75c8aa6ba1b54a8659cc08d93def09a16
  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: b60810cff1bc4698d0b6d93b05711aaeef655a19
      https://github.com/Perl/perl5/commit/b60810cff1bc4698d0b6d93b05711aaeef655a19
  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: 555bd3719fd87ecc2460e468c4ae9de9113d7661
      https://github.com/Perl/perl5/commit/555bd3719fd87ecc2460e468c4ae9de9113d7661
  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: c8d63741e95e9406c239d43366e1cd0b3c2f061e
      https://github.com/Perl/perl5/commit/c8d63741e95e9406c239d43366e1cd0b3c2f061e
  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: 41a4d3a8121b048f5a8e20f629925991b917db65
      https://github.com/Perl/perl5/commit/41a4d3a8121b048f5a8e20f629925991b917db65
  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: c76f24d7dd6b928845e9411b440e5bfc6a129679
      https://github.com/Perl/perl5/commit/c76f24d7dd6b928845e9411b440e5bfc6a129679
  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: 6a25e67940668d9288b918c6b706d1602cb8de20
      https://github.com/Perl/perl5/commit/6a25e67940668d9288b918c6b706d1602cb8de20
  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: e4337b30f15bc97993c05a170f5f3540c8be111f
      https://github.com/Perl/perl5/commit/e4337b30f15bc97993c05a170f5f3540c8be111f
  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: 1900445bd5def65bec195b2eb1f612ceefaf13df
      https://github.com/Perl/perl5/commit/1900445bd5def65bec195b2eb1f612ceefaf13df
  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: 282e66c687813a5ecfa2d513cf847b8879c55e6e
      https://github.com/Perl/perl5/commit/282e66c687813a5ecfa2d513cf847b8879c55e6e
  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: 8c57e5134967c85415ca7aa3b50047125ed9442d
      https://github.com/Perl/perl5/commit/8c57e5134967c85415ca7aa3b50047125ed9442d
  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: 6f6a393b0a23d34fbe7b4fb9af54c03b151233cc
      https://github.com/Perl/perl5/commit/6f6a393b0a23d34fbe7b4fb9af54c03b151233cc
  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: afadd2c75105c2cb0b050fd6670f6cb24e0900e4
      https://github.com/Perl/perl5/commit/afadd2c75105c2cb0b050fd6670f6cb24e0900e4
  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: 354266ac49ff1802f3d17ee85d283c338900b3f5
      https://github.com/Perl/perl5/commit/354266ac49ff1802f3d17ee85d283c338900b3f5
  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: fea2ef54eaa7a602b1a193187fee6fa1cd4747a0
      https://github.com/Perl/perl5/commit/fea2ef54eaa7a602b1a193187fee6fa1cd4747a0
  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: 57ca470b0806a63a6c20908bd6c54bbb46960fc5
      https://github.com/Perl/perl5/commit/57ca470b0806a63a6c20908bd6c54bbb46960fc5
  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: 5204d764914e04ea9dc5f3d5bd5a62dacc7e1edd
      https://github.com/Perl/perl5/commit/5204d764914e04ea9dc5f3d5bd5a62dacc7e1edd
  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: a5f393db689cab50f8e311addc5a4f1885d46b4c
      https://github.com/Perl/perl5/commit/a5f393db689cab50f8e311addc5a4f1885d46b4c
  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: a1b85eb3de362124029207044ff3a7bb43d868fe
      https://github.com/Perl/perl5/commit/a1b85eb3de362124029207044ff3a7bb43d868fe
  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: edadc4b9508a97ace26dcd1546bdc6be2d80e753
      https://github.com/Perl/perl5/commit/edadc4b9508a97ace26dcd1546bdc6be2d80e753
  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: bc0ed86c0d7041edd6e6c6d2ec8cc5e3eb400255
      https://github.com/Perl/perl5/commit/bc0ed86c0d7041edd6e6c6d2ec8cc5e3eb400255
  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: 290e4a5e7127c06dae4b128ae56f53ba8a53017b
      https://github.com/Perl/perl5/commit/290e4a5e7127c06dae4b128ae56f53ba8a53017b
  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: 91036c4bc809ca203647becead5eac7cf2fabd37
      https://github.com/Perl/perl5/commit/91036c4bc809ca203647becead5eac7cf2fabd37
  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: 67c91ccd62926be2fcccf883b168f91e677a5f6d
      https://github.com/Perl/perl5/commit/67c91ccd62926be2fcccf883b168f91e677a5f6d
  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: 95127ac9e4709e9ea72daeda94a95cf6f60b24f0
      https://github.com/Perl/perl5/commit/95127ac9e4709e9ea72daeda94a95cf6f60b24f0
  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: c6aa613bd77c248617cd1691b0593d8c6d39276b
      https://github.com/Perl/perl5/commit/c6aa613bd77c248617cd1691b0593d8c6d39276b
  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: a3109ae1c20ff30235253c1286ef685034d560d3
      https://github.com/Perl/perl5/commit/a3109ae1c20ff30235253c1286ef685034d560d3
  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: d69522437bec2d78db643a3953735b42cf8b3ce7
      https://github.com/Perl/perl5/commit/d69522437bec2d78db643a3953735b42cf8b3ce7
  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: e1294ff69a5da9d1649e11ea3afdbdfedcd24cdc
      https://github.com/Perl/perl5/commit/e1294ff69a5da9d1649e11ea3afdbdfedcd24cdc
  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: eb97f5280ca3c4f759549c499586801440e7282f
      https://github.com/Perl/perl5/commit/eb97f5280ca3c4f759549c499586801440e7282f
  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: 5e6e55a97480130a7376af9460644b64f4920483
      https://github.com/Perl/perl5/commit/5e6e55a97480130a7376af9460644b64f4920483
  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: de87fcf94f834c58ba5a4434d979083e8c76c2f4
      https://github.com/Perl/perl5/commit/de87fcf94f834c58ba5a4434d979083e8c76c2f4
  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: ca30109eeaf1fa711e65b2c46a4cb0da68cd2e7d
      https://github.com/Perl/perl5/commit/ca30109eeaf1fa711e65b2c46a4cb0da68cd2e7d
  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: ec53d0f844954ecd171cd30a52fb58bf2d320c94
      https://github.com/Perl/perl5/commit/ec53d0f844954ecd171cd30a52fb58bf2d320c94
  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: 39b4fd5f30b3270e50e99a551103fd7398fc54d0
      https://github.com/Perl/perl5/commit/39b4fd5f30b3270e50e99a551103fd7398fc54d0
  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: cd288622039288070769ac2552b5cd8ef06b25a7
      https://github.com/Perl/perl5/commit/cd288622039288070769ac2552b5cd8ef06b25a7
  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: 13bd3c685761ad131601d886f59afb45c81f129c
      https://github.com/Perl/perl5/commit/13bd3c685761ad131601d886f59afb45c81f129c
  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: 103846ef268b1bbc3624bf72fc2a825c77f49676
      https://github.com/Perl/perl5/commit/103846ef268b1bbc3624bf72fc2a825c77f49676
  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: ffbc9e3c98dd177895b4117d808bb3de716c9802
      https://github.com/Perl/perl5/commit/ffbc9e3c98dd177895b4117d808bb3de716c9802
  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: b7f844bbab92b8fe17ada51b147a5a73edfa33d3
      https://github.com/Perl/perl5/commit/b7f844bbab92b8fe17ada51b147a5a73edfa33d3
  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: 2895791aeb000da2a31d034dc6db8713243a5e25
      https://github.com/Perl/perl5/commit/2895791aeb000da2a31d034dc6db8713243a5e25
  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: 630a787597cae808e7aa1b87a077f6990c3de257
      https://github.com/Perl/perl5/commit/630a787597cae808e7aa1b87a077f6990c3de257
  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: 431527838a2d0b4475d8794ab584d3addd3c86cd
      https://github.com/Perl/perl5/commit/431527838a2d0b4475d8794ab584d3addd3c86cd
  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: 30f83f83a460a2f1258dff3dc124c339438686ec
      https://github.com/Perl/perl5/commit/30f83f83a460a2f1258dff3dc124c339438686ec
  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: 346697862399ed7e022395132510cffeffbf6296
      https://github.com/Perl/perl5/commit/346697862399ed7e022395132510cffeffbf6296
  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: 9061c332440b507349a282df5b61f4a76cb6f47b
      https://github.com/Perl/perl5/commit/9061c332440b507349a282df5b61f4a76cb6f47b
  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: d5c33c9c98127ade85242aaa5bce298a71714fb1
      https://github.com/Perl/perl5/commit/d5c33c9c98127ade85242aaa5bce298a71714fb1
  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: f9f02e5bc8bf1064e9504695eb23a6e1a84f30df
      https://github.com/Perl/perl5/commit/f9f02e5bc8bf1064e9504695eb23a6e1a84f30df
  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: fb1a5b177a1a3abe1f1066b146bc72d160194b31
      https://github.com/Perl/perl5/commit/fb1a5b177a1a3abe1f1066b146bc72d160194b31
  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: 009ce466ed9c2d00cc5623333a05fedf6fe1dea4
      https://github.com/Perl/perl5/commit/009ce466ed9c2d00cc5623333a05fedf6fe1dea4
  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: aafe110884022e554e33dc989c8e66f36069da64
      https://github.com/Perl/perl5/commit/aafe110884022e554e33dc989c8e66f36069da64
  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: 1632ec913c28d06a00745f735e71d60a6127cc03
      https://github.com/Perl/perl5/commit/1632ec913c28d06a00745f735e71d60a6127cc03
  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: f95901c32730ed0114362d223575dfd9eb813768
      https://github.com/Perl/perl5/commit/f95901c32730ed0114362d223575dfd9eb813768
  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: dc97fd8bebcefd43acb560c8ddf45520aca4bbb3
      https://github.com/Perl/perl5/commit/dc97fd8bebcefd43acb560c8ddf45520aca4bbb3
  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: e7e7bbcc81fe82b100b5c1bf4c51117bae0073b3
      https://github.com/Perl/perl5/commit/e7e7bbcc81fe82b100b5c1bf4c51117bae0073b3
  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: 7505f94635ac09e8af880d40131a9c933b0cb4a8
      https://github.com/Perl/perl5/commit/7505f94635ac09e8af880d40131a9c933b0cb4a8
  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: 27a925dbe5ab4f9787dc9f3f0fd8573e09e74e47
      https://github.com/Perl/perl5/commit/27a925dbe5ab4f9787dc9f3f0fd8573e09e74e47
  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: 78fa918c497830f7d21f434eb33c054f91cab30d
      https://github.com/Perl/perl5/commit/78fa918c497830f7d21f434eb33c054f91cab30d
  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: 4c88ecfe7a4be1f72769df3fe52ca04ed5eb32ac
      https://github.com/Perl/perl5/commit/4c88ecfe7a4be1f72769df3fe52ca04ed5eb32ac
  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: 7080a145ff59bf7bd45fcaccf8a4f94f5c6ecee5
      https://github.com/Perl/perl5/commit/7080a145ff59bf7bd45fcaccf8a4f94f5c6ecee5
  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: 3c3a15f693ece0d597fb86132db8bfba1e1526c4
      https://github.com/Perl/perl5/commit/3c3a15f693ece0d597fb86132db8bfba1e1526c4
  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: 0b44ef8770c2fc2633dbddc2703800c9ba5e22dc
      https://github.com/Perl/perl5/commit/0b44ef8770c2fc2633dbddc2703800c9ba5e22dc
  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: 6cb408d6f9fb08f6c562851f658afe4903709489
      https://github.com/Perl/perl5/commit/6cb408d6f9fb08f6c562851f658afe4903709489
  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: e5b5a5234fdb75455745cb9e8f5a59689e826f6d
      https://github.com/Perl/perl5/commit/e5b5a5234fdb75455745cb9e8f5a59689e826f6d
  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: b604392bbbcfdaf591bc9f102ed6d173c14e49a6
      https://github.com/Perl/perl5/commit/b604392bbbcfdaf591bc9f102ed6d173c14e49a6
  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: 306b158234d489ce0f2bb01e55fb11a1913e8c45
      https://github.com/Perl/perl5/commit/306b158234d489ce0f2bb01e55fb11a1913e8c45
  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: bb4c08257a352da0013ee6533b413e6aaf209c3d
      https://github.com/Perl/perl5/commit/bb4c08257a352da0013ee6533b413e6aaf209c3d
  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: f8f2d94f6b02d13db04cd74a18519cb05d7ee649
      https://github.com/Perl/perl5/commit/f8f2d94f6b02d13db04cd74a18519cb05d7ee649
  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: 6c16fba81c724a5a9dcb4bf637e9860b0614d73b
      https://github.com/Perl/perl5/commit/6c16fba81c724a5a9dcb4bf637e9860b0614d73b
  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: 4a8975714dda619e3625faad7d75a0563302df75
      https://github.com/Perl/perl5/commit/4a8975714dda619e3625faad7d75a0563302df75
  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: 875dcdfeb16d759502873dd8a2a6877653c52b5d
      https://github.com/Perl/perl5/commit/875dcdfeb16d759502873dd8a2a6877653c52b5d
  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: 110014440f29afe23f7504465ba5673e3fbdc139
      https://github.com/Perl/perl5/commit/110014440f29afe23f7504465ba5673e3fbdc139
  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: c9a4c4dcf1925b14257c5e2e0f53d3bb19cec353
      https://github.com/Perl/perl5/commit/c9a4c4dcf1925b14257c5e2e0f53d3bb19cec353
  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: aa878ac3a93e4074bc9cf9787fb102f4bec5fd72
      https://github.com/Perl/perl5/commit/aa878ac3a93e4074bc9cf9787fb102f4bec5fd72
  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: fe0744d5a7832ff8fdc7ea7f893aad814f428fa3
      https://github.com/Perl/perl5/commit/fe0744d5a7832ff8fdc7ea7f893aad814f428fa3
  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: ccd3f7b74691ede1a1e492aaeceff0010f58fc06
      https://github.com/Perl/perl5/commit/ccd3f7b74691ede1a1e492aaeceff0010f58fc06
  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: 67331f4074a462feeda198b2510e7acff6c4829b
      https://github.com/Perl/perl5/commit/67331f4074a462feeda198b2510e7acff6c4829b
  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: ddf59f204003478f1312b2247d3cb432a8b0dc66
      https://github.com/Perl/perl5/commit/ddf59f204003478f1312b2247d3cb432a8b0dc66
  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: 82057bb5e8c05c4605bf079f2b01c9e41cf29cb9
      https://github.com/Perl/perl5/commit/82057bb5e8c05c4605bf079f2b01c9e41cf29cb9
  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: 4cc66b471b48fa154e7b5d97f8400844bbfcf230
      https://github.com/Perl/perl5/commit/4cc66b471b48fa154e7b5d97f8400844bbfcf230
  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: 54cdae58b3c99e43cdf2589702664bada79f3bb0
      https://github.com/Perl/perl5/commit/54cdae58b3c99e43cdf2589702664bada79f3bb0
  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: 75848b0f44cad365218059653a973bc78f18e5a3
      https://github.com/Perl/perl5/commit/75848b0f44cad365218059653a973bc78f18e5a3
  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: 839c8baecd9abf4f3d83b5533f9e1cfc7e80f9a7
      https://github.com/Perl/perl5/commit/839c8baecd9abf4f3d83b5533f9e1cfc7e80f9a7
  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: 4ae24121e644a35c4088b7fc51e35959d814eded
      https://github.com/Perl/perl5/commit/4ae24121e644a35c4088b7fc51e35959d814eded
  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: 8ee2844bffe1804f8b11288b15e40cc24624f40f
      https://github.com/Perl/perl5/commit/8ee2844bffe1804f8b11288b15e40cc24624f40f
  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: 6719fef0edf8d7f69409c633e1b7af613503faa3
      https://github.com/Perl/perl5/commit/6719fef0edf8d7f69409c633e1b7af613503faa3
  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: a6c574f9db7888d272cbcfb09066a3ebfd0bbb80
      https://github.com/Perl/perl5/commit/a6c574f9db7888d272cbcfb09066a3ebfd0bbb80
  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: 06d1088f76ac2aa403935e2c443546c365f9d59f
      https://github.com/Perl/perl5/commit/06d1088f76ac2aa403935e2c443546c365f9d59f
  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: 16d3446033c91860ea2049b27e46f88fde0b38ac
      https://github.com/Perl/perl5/commit/16d3446033c91860ea2049b27e46f88fde0b38ac
  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: 46c04585432bf28c8fb3e03a78cb8424e4e08ace
      https://github.com/Perl/perl5/commit/46c04585432bf28c8fb3e03a78cb8424e4e08ace
  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: 3e988e2746f9f1b948c9266b5f814c2cb00d2c54
      https://github.com/Perl/perl5/commit/3e988e2746f9f1b948c9266b5f814c2cb00d2c54
  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: 18734c7bf2a9d8fcede6dad45111fa5a86359f95
      https://github.com/Perl/perl5/commit/18734c7bf2a9d8fcede6dad45111fa5a86359f95
  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: 002474f6e4e922c11ba804a8e21c8ddfda9b1ee0
      https://github.com/Perl/perl5/commit/002474f6e4e922c11ba804a8e21c8ddfda9b1ee0
  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: dafef9c2e61f9f57f98e5e11305fbc179537493a
      https://github.com/Perl/perl5/commit/dafef9c2e61f9f57f98e5e11305fbc179537493a
  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: cc1cef7a4b97beb9872fced1654e640a37705d08
      https://github.com/Perl/perl5/commit/cc1cef7a4b97beb9872fced1654e640a37705d08
  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: f5418423357ae71ddba55afdc7b6b47a6f0defae
      https://github.com/Perl/perl5/commit/f5418423357ae71ddba55afdc7b6b47a6f0defae
  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: f74264671a7e9ce5e6872d42cbf51845bd96cf0f
      https://github.com/Perl/perl5/commit/f74264671a7e9ce5e6872d42cbf51845bd96cf0f
  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: deabb607ea8faf1eb2bae5a607cf9fa8441dd7ef
      https://github.com/Perl/perl5/commit/deabb607ea8faf1eb2bae5a607cf9fa8441dd7ef
  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: fc5d4f2a3329ce7f69afe329d63fca1295a419ec
      https://github.com/Perl/perl5/commit/fc5d4f2a3329ce7f69afe329d63fca1295a419ec
  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: af5a21a3237a5b2d8ba9fb33b9d08b3b3d2b1943
      https://github.com/Perl/perl5/commit/af5a21a3237a5b2d8ba9fb33b9d08b3b3d2b1943
  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: 396a6a80162eb7fad297313ad24b5a4a5a6cff54
      https://github.com/Perl/perl5/commit/396a6a80162eb7fad297313ad24b5a4a5a6cff54
  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: d1e0a60907bb5aaa556fc5a34d11fccf3724d388
      https://github.com/Perl/perl5/commit/d1e0a60907bb5aaa556fc5a34d11fccf3724d388
  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: 7d7fa494e41f0917a8c97bd8fda7ce77e8af435b
      https://github.com/Perl/perl5/commit/7d7fa494e41f0917a8c97bd8fda7ce77e8af435b
  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: 6502bb06ef3681df85cbdb760d59835eefd6cf65
      https://github.com/Perl/perl5/commit/6502bb06ef3681df85cbdb760d59835eefd6cf65
  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: 9bc247c2b98f63217523c11fb569179e86bd559b
      https://github.com/Perl/perl5/commit/9bc247c2b98f63217523c11fb569179e86bd559b
  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: ab60683f87982095a01ff6de2ac44796dbd116e0
      https://github.com/Perl/perl5/commit/ab60683f87982095a01ff6de2ac44796dbd116e0
  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: 9c1dbe36a5682f2950d72cba8b449ce75f2a3789
      https://github.com/Perl/perl5/commit/9c1dbe36a5682f2950d72cba8b449ce75f2a3789
  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: 97ab28e132e32f4058b581da2808157683667789
      https://github.com/Perl/perl5/commit/97ab28e132e32f4058b581da2808157683667789
  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: 914514d34252dca609715bb185930cf9d23d3123
      https://github.com/Perl/perl5/commit/914514d34252dca609715bb185930cf9d23d3123
  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: 620c185c148e7f7e0cd8f72023b86110b48a3d6c
      https://github.com/Perl/perl5/commit/620c185c148e7f7e0cd8f72023b86110b48a3d6c
  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: 5c9851eee8e5e540165c77fcfb644c9a9df14162
      https://github.com/Perl/perl5/commit/5c9851eee8e5e540165c77fcfb644c9a9df14162
  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: 9fab9982e6a7672ebeb48df87af5c61a81460046
      https://github.com/Perl/perl5/commit/9fab9982e6a7672ebeb48df87af5c61a81460046
  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: 4d6a233db2eebe19f5c8ea8288a336c835706152
      https://github.com/Perl/perl5/commit/4d6a233db2eebe19f5c8ea8288a336c835706152
  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: fb4aea782649905077de5787340a0e7d0e212ae1
      https://github.com/Perl/perl5/commit/fb4aea782649905077de5787340a0e7d0e212ae1
  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: b5cc6163c4f2115d8155f25491a10b966c2dae00
      https://github.com/Perl/perl5/commit/b5cc6163c4f2115d8155f25491a10b966c2dae00
  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: dfe457584638faf8f356d7c01a3b1fc4478c324c
      https://github.com/Perl/perl5/commit/dfe457584638faf8f356d7c01a3b1fc4478c324c
  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: a6587a98dc3ccc2106eeafb348127427007a7028
      https://github.com/Perl/perl5/commit/a6587a98dc3ccc2106eeafb348127427007a7028
  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: ccb434ac94f8c0308c02ee15600056ec5a26194b
      https://github.com/Perl/perl5/commit/ccb434ac94f8c0308c02ee15600056ec5a26194b
  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: 1da6b45c31149977481b2523bad38056dd9ac27e
      https://github.com/Perl/perl5/commit/1da6b45c31149977481b2523bad38056dd9ac27e
  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: 9df3cfb72602e3adce0c2229ac1a94c87490b433
      https://github.com/Perl/perl5/commit/9df3cfb72602e3adce0c2229ac1a94c87490b433
  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: bd90bd525d40e596b139a69f47b9792dc0808d5f
      https://github.com/Perl/perl5/commit/bd90bd525d40e596b139a69f47b9792dc0808d5f
  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: 858de929cd976f2b94005ffdf777c0bb9bfc8845
      https://github.com/Perl/perl5/commit/858de929cd976f2b94005ffdf777c0bb9bfc8845
  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: fea3feab9c82bd6a680d7cf06d31ea862cc7431c
      https://github.com/Perl/perl5/commit/fea3feab9c82bd6a680d7cf06d31ea862cc7431c
  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: 972dd5d443c239ffd58d40430bedf7644c42c3e5
      https://github.com/Perl/perl5/commit/972dd5d443c239ffd58d40430bedf7644c42c3e5
  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: 31eeda1dcba3635912e465f581db6cd25fad616e
      https://github.com/Perl/perl5/commit/31eeda1dcba3635912e465f581db6cd25fad616e
  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: 2dc64b434ba30fd0f093e24bca1ea418c961adf6
      https://github.com/Perl/perl5/commit/2dc64b434ba30fd0f093e24bca1ea418c961adf6
  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: 0b07e3c9072a7ea07c0395a52128720aa8bad1db
      https://github.com/Perl/perl5/commit/0b07e3c9072a7ea07c0395a52128720aa8bad1db
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: 54ef36c3a8b665e2a052e80056fd30558c4f3f01
      https://github.com/Perl/perl5/commit/54ef36c3a8b665e2a052e80056fd30558c4f3f01
  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: 26f06ff672e864a66730899dc5fbe33f1f0c4411
      https://github.com/Perl/perl5/commit/26f06ff672e864a66730899dc5fbe33f1f0c4411
  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: 2b7c9ae7c916d3944dd5f5017c648e2b142e1115
      https://github.com/Perl/perl5/commit/2b7c9ae7c916d3944dd5f5017c648e2b142e1115
  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: 5a1d4b344b2ff06b8bcdd852af1f374fd8a7ab42
      https://github.com/Perl/perl5/commit/5a1d4b344b2ff06b8bcdd852af1f374fd8a7ab42
  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: b0c6620fa55efd25598f8b5b9941ec6e434470e5
      https://github.com/Perl/perl5/commit/b0c6620fa55efd25598f8b5b9941ec6e434470e5
  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: aa1146afbd42ae4a8174c66a955da1eb655c1a27
      https://github.com/Perl/perl5/commit/aa1146afbd42ae4a8174c66a955da1eb655c1a27
  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: 3ebfe18097ecca55c4c510ae24c8418aafb3e474
      https://github.com/Perl/perl5/commit/3ebfe18097ecca55c4c510ae24c8418aafb3e474
  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: 447d2c7bf5ef55646dc6e20479f8e6414edeb29e
      https://github.com/Perl/perl5/commit/447d2c7bf5ef55646dc6e20479f8e6414edeb29e
  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: b439b9e4dbaa0c43a0b47c003584c1250cee0507
      https://github.com/Perl/perl5/commit/b439b9e4dbaa0c43a0b47c003584c1250cee0507
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M locale.c

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


  Commit: fbe477cb13fa9ca71a37520d70890d48bd83f7cc
      https://github.com/Perl/perl5/commit/fbe477cb13fa9ca71a37520d70890d48bd83f7cc
  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: cc28beb520b06bc4ce49a41df907b786c56f24e7
      https://github.com/Perl/perl5/commit/cc28beb520b06bc4ce49a41df907b786c56f24e7
  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: 4d5a4a1684953cc10155b0cca3c0776dfaa582cb
      https://github.com/Perl/perl5/commit/4d5a4a1684953cc10155b0cca3c0776dfaa582cb
  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: ccdd86a771903ce296b6595bdca8f92290e0a32b
      https://github.com/Perl/perl5/commit/ccdd86a771903ce296b6595bdca8f92290e0a32b
  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: 837eaeb737861ef6fe1422c28d114608e9240ac3
      https://github.com/Perl/perl5/commit/837eaeb737861ef6fe1422c28d114608e9240ac3
  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: 9332757178c106aa9600897639b39755042c7e71
      https://github.com/Perl/perl5/commit/9332757178c106aa9600897639b39755042c7e71
  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: a36897275b2094647008ee853741a814b057b102
      https://github.com/Perl/perl5/commit/a36897275b2094647008ee853741a814b057b102
  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: bffbc9700b7346bb3cbe2026c7ddfa50ff24ae16
      https://github.com/Perl/perl5/commit/bffbc9700b7346bb3cbe2026c7ddfa50ff24ae16
  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: 16b841b484116abbb031096e86464c04dd61908e
      https://github.com/Perl/perl5/commit/16b841b484116abbb031096e86464c04dd61908e
  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: 9afd620837821a7c55f17e8108ed8860d2909962
      https://github.com/Perl/perl5/commit/9afd620837821a7c55f17e8108ed8860d2909962
  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: e8d61e82164dfb21b34557d1bf42bdd033a9f259
      https://github.com/Perl/perl5/commit/e8d61e82164dfb21b34557d1bf42bdd033a9f259
  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: a13cf7719714cc8f3bfb519123891d9d7a382331
      https://github.com/Perl/perl5/commit/a13cf7719714cc8f3bfb519123891d9d7a382331
  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: cef628acaf5faeb9b724d9260f085dc164e3e93c
      https://github.com/Perl/perl5/commit/cef628acaf5faeb9b724d9260f085dc164e3e93c
  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: 10e700cf4dadf87046b97b6df12a15de9171d0f0
      https://github.com/Perl/perl5/commit/10e700cf4dadf87046b97b6df12a15de9171d0f0
  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: 9603c0435f9d26a1e244c5fa169b6a73a7cdae15
      https://github.com/Perl/perl5/commit/9603c0435f9d26a1e244c5fa169b6a73a7cdae15
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-05-02 (Sun, 02 May 2021)

  Changed paths:
    M cygwin/cygwin.c

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


  Commit: e762368d1dc3efe9ac8fc172c39316be5bc739dd
      https://github.com/Perl/perl5/commit/e762368d1dc3efe9ac8fc172c39316be5bc739dd
  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: f32dff7c61355bff2c7e94fa83bc34f6dcf0060e
      https://github.com/Perl/perl5/commit/f32dff7c61355bff2c7e94fa83bc34f6dcf0060e
  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: 98185fa7a68856519e058f2943c8b4b2ffe52598
      https://github.com/Perl/perl5/commit/98185fa7a68856519e058f2943c8b4b2ffe52598
  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: b379d99e7d0e09b52013f6e783ffaa1c4467eb1d
      https://github.com/Perl/perl5/commit/b379d99e7d0e09b52013f6e783ffaa1c4467eb1d
  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: e7c95f9816308ad25e80835fcf9411307fdd94a3
      https://github.com/Perl/perl5/commit/e7c95f9816308ad25e80835fcf9411307fdd94a3
  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: 49757089d330f23dab469d8e971ffda178a6ee55
      https://github.com/Perl/perl5/commit/49757089d330f23dab469d8e971ffda178a6ee55
  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: 80e671b37a274f05900af222faf1e9c6d4ddab69
      https://github.com/Perl/perl5/commit/80e671b37a274f05900af222faf1e9c6d4ddab69
  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: c982924d012526387c770b66c65b14c27a530c2b
      https://github.com/Perl/perl5/commit/c982924d012526387c770b66c65b14c27a530c2b
  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: d41558fd2e54b9267e5f20b1a3331970ab4b4e19
      https://github.com/Perl/perl5/commit/d41558fd2e54b9267e5f20b1a3331970ab4b4e19
  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: a76f546e401bbe9c4f32109bf7dafe7dc2f5232c
      https://github.com/Perl/perl5/commit/a76f546e401bbe9c4f32109bf7dafe7dc2f5232c
  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: 9535caab4a97033ee983a3fcb31623c94ecf0f53
      https://github.com/Perl/perl5/commit/9535caab4a97033ee983a3fcb31623c94ecf0f53
  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: d7d8cfd2a1b1e2d1e99aedb22271bb1aed059a1c
      https://github.com/Perl/perl5/commit/d7d8cfd2a1b1e2d1e99aedb22271bb1aed059a1c
  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: 5adf0ce6e76d02c2dcbafb56abc335900594a6c5
      https://github.com/Perl/perl5/commit/5adf0ce6e76d02c2dcbafb56abc335900594a6c5
  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: 3df548bd523e136a8a8956f97aad135291b11554
      https://github.com/Perl/perl5/commit/3df548bd523e136a8a8956f97aad135291b11554
  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: 9bc27eafd4080c3ba64aea10d5f64f3a0267b9be
      https://github.com/Perl/perl5/commit/9bc27eafd4080c3ba64aea10d5f64f3a0267b9be
  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: 7920449293a9c9050c8b146c5428399f79064acc
      https://github.com/Perl/perl5/commit/7920449293a9c9050c8b146c5428399f79064acc
  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: 9e68430e2b04d041deb41d42cf49a76b461ec1f6
      https://github.com/Perl/perl5/commit/9e68430e2b04d041deb41d42cf49a76b461ec1f6
  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: f8ad64d28108b5bc2c98ed8bce37f412fe2b3433
      https://github.com/Perl/perl5/commit/f8ad64d28108b5bc2c98ed8bce37f412fe2b3433
  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: e761ddf140a1efc3f4c2d0c854fe54d956ed9c59
      https://github.com/Perl/perl5/commit/e761ddf140a1efc3f4c2d0c854fe54d956ed9c59
  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: d4da33d3a04a6def9a9b788ba7adb5a379b965d0
      https://github.com/Perl/perl5/commit/d4da33d3a04a6def9a9b788ba7adb5a379b965d0
  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: 3150339332fd601baa213cc5d54436e122f0398f
      https://github.com/Perl/perl5/commit/3150339332fd601baa213cc5d54436e122f0398f
  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: 0f419bac77dbdbdfd6f1e5b2721d6c386bb66003
      https://github.com/Perl/perl5/commit/0f419bac77dbdbdfd6f1e5b2721d6c386bb66003
  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: 9420868dfaa33391f020bea04b230a571143feb8
      https://github.com/Perl/perl5/commit/9420868dfaa33391f020bea04b230a571143feb8
  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: 37b9b8aded40fb836e7bfe93ed8f9d0b94f972be
      https://github.com/Perl/perl5/commit/37b9b8aded40fb836e7bfe93ed8f9d0b94f972be
  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: 2537c8fb22051da438459e7abbfd744bea7a06d9
      https://github.com/Perl/perl5/commit/2537c8fb22051da438459e7abbfd744bea7a06d9
  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: e030be76d5c8969888e741c79e19af4511de3245
      https://github.com/Perl/perl5/commit/e030be76d5c8969888e741c79e19af4511de3245
  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: 697550d09c14ffd284dbe20d1af2cd99e7581c37
      https://github.com/Perl/perl5/commit/697550d09c14ffd284dbe20d1af2cd99e7581c37
  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: be63ab2fc8008304406a9ba7355c81fbf646a1fb
      https://github.com/Perl/perl5/commit/be63ab2fc8008304406a9ba7355c81fbf646a1fb
  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: 292f9010500f47e44d447a874e1231aa8badfe6c
      https://github.com/Perl/perl5/commit/292f9010500f47e44d447a874e1231aa8badfe6c
  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 makedef.pl
    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:
  -----------
  54


Compare: https://github.com/Perl/perl5/compare/7c74bc82f1c2...292f9010500f



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