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[Perl/perl5] 62a122: Add ability to easily add info to DEBUG output

From:
Karl Williamson via perl5-changes
Date:
March 10, 2021 20:35
Subject:
[Perl/perl5] 62a122: Add ability to easily add info to DEBUG output
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/119b7b-92dde7@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: 62a1221312fa33b5abfe6261496a923e65743183
      https://github.com/Perl/perl5/commit/62a1221312fa33b5abfe6261496a923e65743183
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

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

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

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


  Commit: e0e7e4e02a9ff98c7bd8ac551d0240d3f855155c
      https://github.com/Perl/perl5/commit/e0e7e4e02a9ff98c7bd8ac551d0240d3f855155c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M intrpvar.h

  Log Message:
  -----------
  intrpvar.h: Add clarifying comment


  Commit: c7719554ae8b075c6d1dda3e00553ecad421ec4d
      https://github.com/Perl/perl5/commit/c7719554ae8b075c6d1dda3e00553ecad421ec4d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M dosish.h
    M unixish.h

  Log Message:
  -----------
  Unixish.sh, doshish.sh: 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: 5ca30ce27dec46d6fbb9c51822efe2fd58795102
      https://github.com/Perl/perl5/commit/5ca30ce27dec46d6fbb9c51822efe2fd58795102
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Clarify debugging msg for locales

I wrote this years ago, and now have discovered it was written
assuming the consumer is more familiar with the underlying code than
warranted.


  Commit: 6416b08abb59f92a095c9ee57dd6bad16949dd6e
      https://github.com/Perl/perl5/commit/6416b08abb59f92a095c9ee57dd6bad16949dd6e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M mg.c

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


  Commit: 3f44912eaf219c7c0ea6a559ca02424ae42e30df
      https://github.com/Perl/perl5/commit/3f44912eaf219c7c0ea6a559ca02424ae42e30df
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M cygwin/cygwin.c

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


  Commit: ab74ef7bf4de06e1a56a5027589d4468723deb8e
      https://github.com/Perl/perl5/commit/ab74ef7bf4de06e1a56a5027589d4468723deb8e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M lib/locale_threads.t

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


  Commit: 10eafda50f386f4802422c258e7bb631f7e7aa79
      https://github.com/Perl/perl5/commit/10eafda50f386f4802422c258e7bb631f7e7aa79
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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


  Commit: aa2a09606ca1ec2af76a3e5909ac54421319914f
      https://github.com/Perl/perl5/commit/aa2a09606ca1ec2af76a3e5909ac54421319914f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 55ca43ac065571303d32beb4d73f77b67a89757d
      https://github.com/Perl/perl5/commit/55ca43ac065571303d32beb4d73f77b67a89757d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 4d7fcf4d2ff2088201cc5862fa6380c646af35d4
      https://github.com/Perl/perl5/commit/4d7fcf4d2ff2088201cc5862fa6380c646af35d4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M handy.h

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

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

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


  Commit: ff175ea7c5631d5caf7ee9f83749b6af484c27c8
      https://github.com/Perl/perl5/commit/ff175ea7c5631d5caf7ee9f83749b6af484c27c8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M handy.h

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


  Commit: cbb5c13ac0a41d00d7fc5d6e7eaaa573d4aa8bb4
      https://github.com/Perl/perl5/commit/cbb5c13ac0a41d00d7fc5d6e7eaaa573d4aa8bb4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 5abd3d7130c386b9319f2acee240c970182166e7
      https://github.com/Perl/perl5/commit/5abd3d7130c386b9319f2acee240c970182166e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 92d8c9ed20622c0662586cf066c720ae3e7e159a
      https://github.com/Perl/perl5/commit/92d8c9ed20622c0662586cf066c720ae3e7e159a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 4ef5cb9e246a926bace6e9111df47033b2444469
      https://github.com/Perl/perl5/commit/4ef5cb9e246a926bace6e9111df47033b2444469
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 074cc1bff12701c1deacef318d0520652698b0c9
      https://github.com/Perl/perl5/commit/074cc1bff12701c1deacef318d0520652698b0c9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M handy.h

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

This changes the parameters etc, in preparation for further changes


  Commit: 83a2bd2eb77d6ece440aafc46b2be6f23fad2efb
      https://github.com/Perl/perl5/commit/83a2bd2eb77d6ece440aafc46b2be6f23fad2efb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 3d66ab7e95969d4bda447688a6f889e5bff5b7fb
      https://github.com/Perl/perl5/commit/3d66ab7e95969d4bda447688a6f889e5bff5b7fb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 4703bd57d82c6d19c5d600734f7d211752fd04bc
      https://github.com/Perl/perl5/commit/4703bd57d82c6d19c5d600734f7d211752fd04bc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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


  Commit: 951ad8515e14616f0c52338419cf57bdd9efa275
      https://github.com/Perl/perl5/commit/951ad8515e14616f0c52338419cf57bdd9efa275
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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


  Commit: 26a4508db24102ca01f9e3eee28695fae888bf9d
      https://github.com/Perl/perl5/commit/26a4508db24102ca01f9e3eee28695fae888bf9d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: 030692f698fd8192607eeb2cc9c2a146ce5f872c
      https://github.com/Perl/perl5/commit/030692f698fd8192607eeb2cc9c2a146ce5f872c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: bdacd12fecc1922ba74028d1e9a27b4e16a8e629
      https://github.com/Perl/perl5/commit/bdacd12fecc1922ba74028d1e9a27b4e16a8e629
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 0544d4d1fa03930a557b4d7c02511c9b6875169b
      https://github.com/Perl/perl5/commit/0544d4d1fa03930a557b4d7c02511c9b6875169b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 866eec7088920ef79515e71e42c02e35fd2d64af
      https://github.com/Perl/perl5/commit/866eec7088920ef79515e71e42c02e35fd2d64af
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: dd5b5f4d1aad882a0129ea9e70eee6c4b9603f4c
      https://github.com/Perl/perl5/commit/dd5b5f4d1aad882a0129ea9e70eee6c4b9603f4c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: 8c1c273d413c9191b37d9698b46d42a9061b99e0
      https://github.com/Perl/perl5/commit/8c1c273d413c9191b37d9698b46d42a9061b99e0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: 52281a69096f9c75d9176632e833cc2de530159e
      https://github.com/Perl/perl5/commit/52281a69096f9c75d9176632e833cc2de530159e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 015abb88e8eb05a3e8541812d5b26d7e3ae8db84
      https://github.com/Perl/perl5/commit/015abb88e8eb05a3e8541812d5b26d7e3ae8db84
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 18206e669bc5af8b03914cfcf3502390987e8765
      https://github.com/Perl/perl5/commit/18206e669bc5af8b03914cfcf3502390987e8765
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: bedc388a7fad7b5fdaba5a9cf7de520542700507
      https://github.com/Perl/perl5/commit/bedc388a7fad7b5fdaba5a9cf7de520542700507
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

Some of these are to make future difference listings shorter

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


  Commit: d33b1713b28429d36d9dcd9e3fff67bb5c3bb75c
      https://github.com/Perl/perl5/commit/d33b1713b28429d36d9dcd9e3fff67bb5c3bb75c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: fdb59f169ae01ca9da70612f292f11f91a66c0dd
      https://github.com/Perl/perl5/commit/fdb59f169ae01ca9da70612f292f11f91a66c0dd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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

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


  Commit: 85310a155bb0c5be431d26261ed99a42dd6f48a8
      https://github.com/Perl/perl5/commit/85310a155bb0c5be431d26261ed99a42dd6f48a8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 62de579b52f42eae172bd7dfc6ff038e4849ba9d
      https://github.com/Perl/perl5/commit/62de579b52f42eae172bd7dfc6ff038e4849ba9d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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

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


  Commit: b2f6f0fb1e62f8e80bd1df9f0a1b02796167e567
      https://github.com/Perl/perl5/commit/b2f6f0fb1e62f8e80bd1df9f0a1b02796167e567
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: ce7bb8ec6cfb19a494a2511aca707ce7231a7ccb
      https://github.com/Perl/perl5/commit/ce7bb8ec6cfb19a494a2511aca707ce7231a7ccb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: d1ccdcb92bc0d2a8a43c8bb18e90db84f6a6bcce
      https://github.com/Perl/perl5/commit/d1ccdcb92bc0d2a8a43c8bb18e90db84f6a6bcce
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 2d352b7c5d67faa7701bdd2b1ba9ab06e0060261
      https://github.com/Perl/perl5/commit/2d352b7c5d67faa7701bdd2b1ba9ab06e0060261
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

This panic is done when a setlocale unexpectedly fails.


  Commit: 2dc8429b91f33f1cf160e8f39269b09f0ac5b03f
      https://github.com/Perl/perl5/commit/2dc8429b91f33f1cf160e8f39269b09f0ac5b03f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 5c586dd5a885652cac7d9cf597088ac4d50ae60e
      https://github.com/Perl/perl5/commit/5c586dd5a885652cac7d9cf597088ac4d50ae60e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: 3cf0adc3387fc34d7ea5127c6239f81bedda7507
      https://github.com/Perl/perl5/commit/3cf0adc3387fc34d7ea5127c6239f81bedda7507
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 2cd3044338a33d3a27d2a0599948f5e7d1413046
      https://github.com/Perl/perl5/commit/2cd3044338a33d3a27d2a0599948f5e7d1413046
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 289443bb42e5fcc2dd14cff5c6007f3f01127903
      https://github.com/Perl/perl5/commit/289443bb42e5fcc2dd14cff5c6007f3f01127903
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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

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

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


  Commit: 657d0c1db8ceb91f344ff130d8ed3bec764b3511
      https://github.com/Perl/perl5/commit/657d0c1db8ceb91f344ff130d8ed3bec764b3511
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: 1ae71db73fa3f6e9526d1866e6171702a1de3553
      https://github.com/Perl/perl5/commit/1ae71db73fa3f6e9526d1866e6171702a1de3553
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Allow use of glibc undocumented locale fcn

glibc does not furnish querylocale() that Darwin and *BSD systems do.
But glibc does provide a long-standing, undocumented querylocale
equivalent.

Perl provides a workaround for systems without querylocale(), but this
commit causes -Accflags=-DUSE_NL_LOCALE_NAME when passed to Configure to
use the undocumented function instead of the workaround.  For now, I am
not otherwise documenting this ability, since the underlying function
isn't documented.


  Commit: e1afcc7fbfe80a2533a715598b014795dd5c0d46
      https://github.com/Perl/perl5/commit/e1afcc7fbfe80a2533a715598b014795dd5c0d46
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

A goto is hence replaced by a recursive call.


  Commit: e3ec829e2fb605aa51a282af86a59302554e9635
      https://github.com/Perl/perl5/commit/e3ec829e2fb605aa51a282af86a59302554e9635
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 07ee8eede9e3bf2628b02fce8482165a33e7ff28
      https://github.com/Perl/perl5/commit/07ee8eede9e3bf2628b02fce8482165a33e7ff28
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: a828c233673dbad61960694559a49c0442c95009
      https://github.com/Perl/perl5/commit/a828c233673dbad61960694559a49c0442c95009
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: e5446deb181643ec633c84a2af52de7ba1e4d63c
      https://github.com/Perl/perl5/commit/e5446deb181643ec633c84a2af52de7ba1e4d63c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 58531ef2b4b84ede45f990dcacc0887fb2d191d6
      https://github.com/Perl/perl5/commit/58531ef2b4b84ede45f990dcacc0887fb2d191d6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: ab370ea60e6837409e90b5ad97b9a2a39a1e0ad3
      https://github.com/Perl/perl5/commit/ab370ea60e6837409e90b5ad97b9a2a39a1e0ad3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M sv.c

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

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


  Commit: ed0453e1f9df4aa51a36118fa30a655f18d9831c
      https://github.com/Perl/perl5/commit/ed0453e1f9df4aa51a36118fa30a655f18d9831c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: b6360bbadbeb6a2185376ceeaf7f4bf0c560bf68
      https://github.com/Perl/perl5/commit/b6360bbadbeb6a2185376ceeaf7f4bf0c560bf68
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: d7748a8a78509ed0f20da1a30da01528a26e29da
      https://github.com/Perl/perl5/commit/d7748a8a78509ed0f20da1a30da01528a26e29da
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: c644bbd052d00328ea73326ddc9ad680772a62d1
      https://github.com/Perl/perl5/commit/c644bbd052d00328ea73326ddc9ad680772a62d1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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

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


  Commit: 586eb089e0e12060b923883b3d8108270a15e85e
      https://github.com/Perl/perl5/commit/586eb089e0e12060b923883b3d8108270a15e85e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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

Properly indent some nested preprocessor directives


  Commit: 246e2a8539c1cf80ba6f21b1413e9867cfd040c2
      https://github.com/Perl/perl5/commit/246e2a8539c1cf80ba6f21b1413e9867cfd040c2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

This avoids duplicated logic.


  Commit: a6ea06010217ba719d39742d18bfdbab4d7c3f9b
      https://github.com/Perl/perl5/commit/a6ea06010217ba719d39742d18bfdbab4d7c3f9b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 331ff203d326a4af2c7d1b80b188ea01c3dffe08
      https://github.com/Perl/perl5/commit/331ff203d326a4af2c7d1b80b188ea01c3dffe08
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: ac914837debe3c679d20aeee96b0e371b0d9237b
      https://github.com/Perl/perl5/commit/ac914837debe3c679d20aeee96b0e371b0d9237b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: f923bfc379aa5d44ab8100af7faab361a93548d6
      https://github.com/Perl/perl5/commit/f923bfc379aa5d44ab8100af7faab361a93548d6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: df2ef674d56257af2251e6ca79087529bd27ae82
      https://github.com/Perl/perl5/commit/df2ef674d56257af2251e6ca79087529bd27ae82
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: f4a062c5740f94361705b59dd2c155298f8c327c
      https://github.com/Perl/perl5/commit/f4a062c5740f94361705b59dd2c155298f8c327c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

The extra syllable(s) are unnecessary noise


  Commit: 4462049d0d28627412e073964a36989addb572ee
      https://github.com/Perl/perl5/commit/4462049d0d28627412e073964a36989addb572ee
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 3e6dd1d9beeb1cff777eba66c2de56476b4a2ca0
      https://github.com/Perl/perl5/commit/3e6dd1d9beeb1cff777eba66c2de56476b4a2ca0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

This allows some preprocessor conditionals to be removed


  Commit: 0218d07d8c56e3e31fd79d5537d4e606b094a8a9
      https://github.com/Perl/perl5/commit/0218d07d8c56e3e31fd79d5537d4e606b094a8a9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

strEQ and && already return booleans


  Commit: 44f655af59efeda23036dac9f014a09dff2fc596
      https://github.com/Perl/perl5/commit/44f655af59efeda23036dac9f014a09dff2fc596
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: d2f40f0ded8fc74b9b44676340a794689e6c865f
      https://github.com/Perl/perl5/commit/d2f40f0ded8fc74b9b44676340a794689e6c865f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 1d8853cd73c2a1a7bbe9e0f708f6887ad168e98b
      https://github.com/Perl/perl5/commit/1d8853cd73c2a1a7bbe9e0f708f6887ad168e98b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 7f16ca8444c8bc1972ace20979a4fe02bd10e946
      https://github.com/Perl/perl5/commit/7f16ca8444c8bc1972ace20979a4fe02bd10e946
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

Previous commits have gotten rid of this parameter to S_save_to_buffer


  Commit: 76a526e641c91003f17b535d5eb9f2886f225400
      https://github.com/Perl/perl5/commit/76a526e641c91003f17b535d5eb9f2886f225400
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: 0faeb8faf5c677e80545cf42d157dbd8668d1b5b
      https://github.com/Perl/perl5/commit/0faeb8faf5c677e80545cf42d157dbd8668d1b5b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

This adds some compile safety to these.


  Commit: e45471c933322757c5ce615b80c7beae7f28fde5
      https://github.com/Perl/perl5/commit/e45471c933322757c5ce615b80c7beae7f28fde5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

This is in preparation for the next commit


  Commit: de2c8e69e32770cbf37d671b244294580190b8d2
      https://github.com/Perl/perl5/commit/de2c8e69e32770cbf37d671b244294580190b8d2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: c1fa3697eefd5f683617a9e1e9def2f242a206a5
      https://github.com/Perl/perl5/commit/c1fa3697eefd5f683617a9e1e9def2f242a206a5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 2cf8da936fa0caeb714629ef95fc2b3b3548b6da
      https://github.com/Perl/perl5/commit/2cf8da936fa0caeb714629ef95fc2b3b3548b6da
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

It won't be actually used until the next commit


  Commit: 9cc1d5db7717713f4599a22bb8c6aa11cc1cc4f3
      https://github.com/Perl/perl5/commit/9cc1d5db7717713f4599a22bb8c6aa11cc1cc4f3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

This commit adds three checks:

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

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

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

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


  Commit: cf1a00618c8c15724ef8d468a078ea32f2896269
      https://github.com/Perl/perl5/commit/cf1a00618c8c15724ef8d468a078ea32f2896269
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: 38217086d815117f2fd8e6babc8aebd58355c665
      https://github.com/Perl/perl5/commit/38217086d815117f2fd8e6babc8aebd58355c665
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: 90a18719b3d2da1c9b8528e14c409c10d6fe87ce
      https://github.com/Perl/perl5/commit/90a18719b3d2da1c9b8528e14c409c10d6fe87ce
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 2d8612b3e013c52e6344680803017d950cbefb34
      https://github.com/Perl/perl5/commit/2d8612b3e013c52e6344680803017d950cbefb34
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: 4f8dcf1e800e7c6e537504f85d26a9e820862ed8
      https://github.com/Perl/perl5/commit/4f8dcf1e800e7c6e537504f85d26a9e820862ed8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: 914e3f25306d0123edf7bc3be1767aa15909ccb8
      https://github.com/Perl/perl5/commit/914e3f25306d0123edf7bc3be1767aa15909ccb8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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

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


  Commit: a83857a057541877f6909e7d37066fd2f3ca0c9f
      https://github.com/Perl/perl5/commit/a83857a057541877f6909e7d37066fd2f3ca0c9f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 52b3d85500c4144938b1ca7776d17444538d3738
      https://github.com/Perl/perl5/commit/52b3d85500c4144938b1ca7776d17444538d3738
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 1c75e29fbd5c87bd0116eaa3a2698294956294ee
      https://github.com/Perl/perl5/commit/1c75e29fbd5c87bd0116eaa3a2698294956294ee
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 19180c9043c1d44426c23ee848ccd4eef99636b9
      https://github.com/Perl/perl5/commit/19180c9043c1d44426c23ee848ccd4eef99636b9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: b33f67d75ffce230d7dae94055cd234ef8455f0c
      https://github.com/Perl/perl5/commit/b33f67d75ffce230d7dae94055cd234ef8455f0c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 81399c2e915ce28488eace81aa69dc7bc14fbfb6
      https://github.com/Perl/perl5/commit/81399c2e915ce28488eace81aa69dc7bc14fbfb6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 31d1742b37c6eed0a64b7fe7c0d28a983e9f4817
      https://github.com/Perl/perl5/commit/31d1742b37c6eed0a64b7fe7c0d28a983e9f4817
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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

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


  Commit: 772c14f2b0e8fbec1228d35cae3b83e501a64a32
      https://github.com/Perl/perl5/commit/772c14f2b0e8fbec1228d35cae3b83e501a64a32
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: 6e4a4778a0c8b02659fa86567514ff73f56a4a8e
      https://github.com/Perl/perl5/commit/6e4a4778a0c8b02659fa86567514ff73f56a4a8e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M mg.c

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

Indent newly formed block from the previous commit.


  Commit: 303151bf434e5518c588f57ceff69f099429a0b1
      https://github.com/Perl/perl5/commit/303151bf434e5518c588f57ceff69f099429a0b1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: feca5097f74a76eec362815f0d329987e9f665d7
      https://github.com/Perl/perl5/commit/feca5097f74a76eec362815f0d329987e9f665d7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 2389802fb9fa721c5361328c6f85680605b86b3c
      https://github.com/Perl/perl5/commit/2389802fb9fa721c5361328c6f85680605b86b3c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: c3f99d6c6f305e5b10fb6467a552e8573a2198c0
      https://github.com/Perl/perl5/commit/c3f99d6c6f305e5b10fb6467a552e8573a2198c0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 3082803f8f29335ca3a30b008736f10184bb9ce4
      https://github.com/Perl/perl5/commit/3082803f8f29335ca3a30b008736f10184bb9ce4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 70c436bf0d09bb1d23b8ceed8fd28c47687a897c
      https://github.com/Perl/perl5/commit/70c436bf0d09bb1d23b8ceed8fd28c47687a897c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 97ada9e11ebd7ce350d59407f7ec80c6ac1945f5
      https://github.com/Perl/perl5/commit/97ada9e11ebd7ce350d59407f7ec80c6ac1945f5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: 285166b721c48f42869153d173c2b39265cfddd3
      https://github.com/Perl/perl5/commit/285166b721c48f42869153d173c2b39265cfddd3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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

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


  Commit: 2a3e34fa7bd8ff47a6c4ad9522b611540b25ae6d
      https://github.com/Perl/perl5/commit/2a3e34fa7bd8ff47a6c4ad9522b611540b25ae6d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M intrpvar.h

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

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


  Commit: 7de289eb4e99d1cfe97025bdadd6bd4e6b9fdc06
      https://github.com/Perl/perl5/commit/7de289eb4e99d1cfe97025bdadd6bd4e6b9fdc06
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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

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


  Commit: f0199c23bf77f9c522ec0fe64e6883ab0fff1d19
      https://github.com/Perl/perl5/commit/f0199c23bf77f9c522ec0fe64e6883ab0fff1d19
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 592f69f48295c01a8d2872e37920f76a0f34e4ab
      https://github.com/Perl/perl5/commit/592f69f48295c01a8d2872e37920f76a0f34e4ab
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: cfc698abbea70d99b1fdc5fc16165995d0b18324
      https://github.com/Perl/perl5/commit/cfc698abbea70d99b1fdc5fc16165995d0b18324
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: fbb83d26f71bd42d44f85784d9568f3ab68f03b9
      https://github.com/Perl/perl5/commit/fbb83d26f71bd42d44f85784d9568f3ab68f03b9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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


  Commit: c5c3c02a0680a26ae784bbf3432f42488286bbc7
      https://github.com/Perl/perl5/commit/c5c3c02a0680a26ae784bbf3432f42488286bbc7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 46552d6300fc1b0216a4519898a0f8ddb19dc3ec
      https://github.com/Perl/perl5/commit/46552d6300fc1b0216a4519898a0f8ddb19dc3ec
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

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

Explanatory comments are also added.


  Commit: a626068e49a0e3cb56d6111db950db2d6f140574
      https://github.com/Perl/perl5/commit/a626068e49a0e3cb56d6111db950db2d6f140574
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: c143f167d44519cdb2aca7094e7a3437e9f77dab
      https://github.com/Perl/perl5/commit/c143f167d44519cdb2aca7094e7a3437e9f77dab
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 0b737c5de0be896a4a21654461cfe3c5bd411843
      https://github.com/Perl/perl5/commit/0b737c5de0be896a4a21654461cfe3c5bd411843
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 71a664d4272eafd7c8ae449af975096853eac317
      https://github.com/Perl/perl5/commit/71a664d4272eafd7c8ae449af975096853eac317
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 23e1297bf9d3a1c9cad028db784667257d34ef9d
      https://github.com/Perl/perl5/commit/23e1297bf9d3a1c9cad028db784667257d34ef9d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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

This commit brings the locales into alignment if necessary


  Commit: 216fd5ff7e9189c5616ad94269f9ca6b6aba574e
      https://github.com/Perl/perl5/commit/216fd5ff7e9189c5616ad94269f9ca6b6aba574e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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


  Commit: b677dfe742a368d6a717052013cfcb389a2a8036
      https://github.com/Perl/perl5/commit/b677dfe742a368d6a717052013cfcb389a2a8036
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M lib/locale.t

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


  Commit: 51b199aab4b1895074210489778be02d2e73eeb6
      https://github.com/Perl/perl5/commit/51b199aab4b1895074210489778be02d2e73eeb6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 1150ea2059483bfd7f12df62181bd6db3fd0c185
      https://github.com/Perl/perl5/commit/1150ea2059483bfd7f12df62181bd6db3fd0c185
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

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

Hex is the more familiar form


  Commit: b2961305c4c98c4139ba6b914a95a9a98281d16e
      https://github.com/Perl/perl5/commit/b2961305c4c98c4139ba6b914a95a9a98281d16e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  extra debug


  Commit: 91985f744670b2ca77b11480df8c79578140b651
      https://github.com/Perl/perl5/commit/91985f744670b2ca77b11480df8c79578140b651
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 04bf0bc2c745bec35b1d143c34a52f65f24ebc55
      https://github.com/Perl/perl5/commit/04bf0bc2c745bec35b1d143c34a52f65f24ebc55
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXX f inRANGE


  Commit: 1e482473829914203c306196cd429924c487cd0c
      https://github.com/Perl/perl5/commit/1e482473829914203c306196cd429924c487cd0c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

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

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


  Commit: ddecbea61d162538244416a296fd9b0febc3b45f
      https://github.com/Perl/perl5/commit/ddecbea61d162538244416a296fd9b0febc3b45f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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


  Commit: 7afc76b3cd42567ff01e38680aeae762bb6712a1
      https://github.com/Perl/perl5/commit/7afc76b3cd42567ff01e38680aeae762bb6712a1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

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


  Commit: cbb2bfdf424eb47b9f5f33d224d7ff2a35d11e42
      https://github.com/Perl/perl5/commit/cbb2bfdf424eb47b9f5f33d224d7ff2a35d11e42
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

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

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

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


  Commit: 70a218927f685f75d2bda223bca7a3d482283075
      https://github.com/Perl/perl5/commit/70a218927f685f75d2bda223bca7a3d482283075
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

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

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


  Commit: d9ad17668efe65268b60581fa6923e2463e72270
      https://github.com/Perl/perl5/commit/d9ad17668efe65268b60581fa6923e2463e72270
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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


  Commit: 73f94bcdcab0d0b1084308722a72a7f3866bfd05
      https://github.com/Perl/perl5/commit/73f94bcdcab0d0b1084308722a72a7f3866bfd05
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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


  Commit: a27ae1b8e04cd346dc14de023ac59152ae4f4d4a
      https://github.com/Perl/perl5/commit/a27ae1b8e04cd346dc14de023ac59152ae4f4d4a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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

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

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

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


  Commit: 9b8f724d0113895348d9b5175097225fab846aa3
      https://github.com/Perl/perl5/commit/9b8f724d0113895348d9b5175097225fab846aa3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

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

This simplifies slightly, and will allow further simplification


  Commit: 8f0d83fb5f08c99d333825fad505eca840ae3f5f
      https://github.com/Perl/perl5/commit/8f0d83fb5f08c99d333825fad505eca840ae3f5f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

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

To enable future simplifications


  Commit: a785d1565e6395d3eb0acf2f6d0ccd1f77253104
      https://github.com/Perl/perl5/commit/a785d1565e6395d3eb0acf2f6d0ccd1f77253104
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h Simplify some locale-related defns

This removes some conditionals made redundant by previous commits.


  Commit: bf95f59051fcef33406642fdd7a5b26bfc1766e9
      https://github.com/Perl/perl5/commit/bf95f59051fcef33406642fdd7a5b26bfc1766e9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

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

All it does is:

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

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


  Commit: 2b1845726e35eb7e6f5ce9b0527390a11d23bdff
      https://github.com/Perl/perl5/commit/2b1845726e35eb7e6f5ce9b0527390a11d23bdff
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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


  Commit: 123bd04f4fecabc86a26d568efd36914c96ad76e
      https://github.com/Perl/perl5/commit/123bd04f4fecabc86a26d568efd36914c96ad76e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M t/loc_tools.pl

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


  Commit: 878bb2eeb4532598d2ebfd9351f301d40a8edde4
      https://github.com/Perl/perl5/commit/878bb2eeb4532598d2ebfd9351f301d40a8edde4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M pp.c

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


  Commit: eb2c77de4862344972bb3a17e86c35a08253569c
      https://github.com/Perl/perl5/commit/eb2c77de4862344972bb3a17e86c35a08253569c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

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

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

tests, copy in thread create


  Commit: 54e96d741ede4d4d6dda664b742bf90d6521d385
      https://github.com/Perl/perl5/commit/54e96d741ede4d4d6dda664b742bf90d6521d385
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M inline.h

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


  Commit: 92dde7462c4e9e614f311de57b42896422f9bc3f
      https://github.com/Perl/perl5/commit/92dde7462c4e9e614f311de57b42896422f9bc3f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-10 (Wed, 10 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M embedvar.h
    M inline.h
    M intrpvar.h
    M lib/locale_threads.t
    M locale.c
    M makedef.pl
    M perl.c
    M perl.h
    M proto.h
    M sv.c

  Log Message:
  -----------
  f


Compare: https://github.com/Perl/perl5/compare/119b7be48d26...92dde7462c4e



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