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[Perl/perl5] 12a5cc: Add ability to easily add info to DEBUG output

From:
Karl Williamson via perl5-changes
Date:
March 15, 2021 00:38
Subject:
[Perl/perl5] 12a5cc: Add ability to easily add info to DEBUG output
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/3ff60b-9a7361@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: 12a5cc505568889efa091e27e9d866a2e979b915
      https://github.com/Perl/perl5/commit/12a5cc505568889efa091e27e9d866a2e979b915
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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

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

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


  Commit: 71c83457628a4044bc3221e3fa8252da0c0534b2
      https://github.com/Perl/perl5/commit/71c83457628a4044bc3221e3fa8252da0c0534b2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M dosish.h
    M unixish.h

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

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

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

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


  Commit: 244a92dbff29625a24e347c7a4aeb93183f1295e
      https://github.com/Perl/perl5/commit/244a92dbff29625a24e347c7a4aeb93183f1295e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M t/loc_tools.pl

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

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


  Commit: 0a0a47f9a1bc59baf0d7452a11be1841f85b1a24
      https://github.com/Perl/perl5/commit/0a0a47f9a1bc59baf0d7452a11be1841f85b1a24
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M mg.c

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


  Commit: 49bacf2e8b610b7a55680e349e5506c22fe04a35
      https://github.com/Perl/perl5/commit/49bacf2e8b610b7a55680e349e5506c22fe04a35
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: ccfcd471a80d96a1679e6e531605459b87c4471d
      https://github.com/Perl/perl5/commit/ccfcd471a80d96a1679e6e531605459b87c4471d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M lib/locale_threads.t

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


  Commit: bd756a82a5e8995a085bafc48e091637b85aa4c2
      https://github.com/Perl/perl5/commit/bd756a82a5e8995a085bafc48e091637b85aa4c2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 90a25d5b4b751f582382eb6b91b3002319c76f5f
      https://github.com/Perl/perl5/commit/90a25d5b4b751f582382eb6b91b3002319c76f5f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: cf13f0aa48b1ad764b7346e599346d5c1c62ff50
      https://github.com/Perl/perl5/commit/cf13f0aa48b1ad764b7346e599346d5c1c62ff50
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 94ff4826681d5f541d769b4ad112f0ff9eca6996
      https://github.com/Perl/perl5/commit/94ff4826681d5f541d769b4ad112f0ff9eca6996
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: e7614712f70b7d4b568939f19c9bc4c50989ffb8
      https://github.com/Perl/perl5/commit/e7614712f70b7d4b568939f19c9bc4c50989ffb8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M handy.h

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


  Commit: 1a059d058a840abe728c5441b7c1ac63359a0c42
      https://github.com/Perl/perl5/commit/1a059d058a840abe728c5441b7c1ac63359a0c42
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 214af767fab73a431a73eba55f57ab11aa49b2db
      https://github.com/Perl/perl5/commit/214af767fab73a431a73eba55f57ab11aa49b2db
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: d08f9007f40b472fe8ec9a0b5ec483897487322b
      https://github.com/Perl/perl5/commit/d08f9007f40b472fe8ec9a0b5ec483897487322b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: bd4ab0a38adfe0f8c19d103dc5617609e4078a3a
      https://github.com/Perl/perl5/commit/bd4ab0a38adfe0f8c19d103dc5617609e4078a3a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 72c00df43e23f01d4b065a18f1a5c3ef641bbbd9
      https://github.com/Perl/perl5/commit/72c00df43e23f01d4b065a18f1a5c3ef641bbbd9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 123ee071d67037b9f56ff42409cef0bb2fca9ba8
      https://github.com/Perl/perl5/commit/123ee071d67037b9f56ff42409cef0bb2fca9ba8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: b8fc4012e5fe491d1090eba826478c184d6d90cf
      https://github.com/Perl/perl5/commit/b8fc4012e5fe491d1090eba826478c184d6d90cf
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: f2ff267c0a629eef3a1dfaf78f2d33c5fe3c0d11
      https://github.com/Perl/perl5/commit/f2ff267c0a629eef3a1dfaf78f2d33c5fe3c0d11
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: a697e129cd75c82ddbf37c3b996be37e49496746
      https://github.com/Perl/perl5/commit/a697e129cd75c82ddbf37c3b996be37e49496746
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 708098825304bdfb7fbf878656e5da21a6548152
      https://github.com/Perl/perl5/commit/708098825304bdfb7fbf878656e5da21a6548152
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: cf5e3297d5d02a72a14f6d50335d7bde20dba6a1
      https://github.com/Perl/perl5/commit/cf5e3297d5d02a72a14f6d50335d7bde20dba6a1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: ebd3478a1ed5a7c09ad2679995c5bb053780ccd8
      https://github.com/Perl/perl5/commit/ebd3478a1ed5a7c09ad2679995c5bb053780ccd8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: e7a0f12e4fea12c9c6a3f7e48f9dff081754f0fd
      https://github.com/Perl/perl5/commit/e7a0f12e4fea12c9c6a3f7e48f9dff081754f0fd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: b2df384e3fc0080d849f303ac11b85428052253c
      https://github.com/Perl/perl5/commit/b2df384e3fc0080d849f303ac11b85428052253c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: d14349e89867739158016ce6d67f5cefcee12764
      https://github.com/Perl/perl5/commit/d14349e89867739158016ce6d67f5cefcee12764
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 5bb48b05050007a246bc644c69e670b74e7fbb73
      https://github.com/Perl/perl5/commit/5bb48b05050007a246bc644c69e670b74e7fbb73
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 1b773cbfa9ba0f916a9a4f401dfa31679dbf2537
      https://github.com/Perl/perl5/commit/1b773cbfa9ba0f916a9a4f401dfa31679dbf2537
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 1249c17dcdd8244b9500e12dd3551273b3879487
      https://github.com/Perl/perl5/commit/1249c17dcdd8244b9500e12dd3551273b3879487
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: fd026357789af130ab6d04be4dd141968517412e
      https://github.com/Perl/perl5/commit/fd026357789af130ab6d04be4dd141968517412e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 088478ae753b76740fb327a5da2d8449e293ecb1
      https://github.com/Perl/perl5/commit/088478ae753b76740fb327a5da2d8449e293ecb1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 64a1e6628aea8bd2ffc88de8f09be7c9c0a29dc9
      https://github.com/Perl/perl5/commit/64a1e6628aea8bd2ffc88de8f09be7c9c0a29dc9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 42308afb559fc00e7611a531d4b023c3e7907ca2
      https://github.com/Perl/perl5/commit/42308afb559fc00e7611a531d4b023c3e7907ca2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 7c5f4e669635682ce9db94640d3d43cebf5bc461
      https://github.com/Perl/perl5/commit/7c5f4e669635682ce9db94640d3d43cebf5bc461
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 99140b93c757947182ffe2d5db1c349f992f9a07
      https://github.com/Perl/perl5/commit/99140b93c757947182ffe2d5db1c349f992f9a07
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 474a9de6fe394bafbf73428b898c62a3c0f5e49f
      https://github.com/Perl/perl5/commit/474a9de6fe394bafbf73428b898c62a3c0f5e49f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 277f92a90bd6ba4a3dd00781049f1c4a2d670de3
      https://github.com/Perl/perl5/commit/277f92a90bd6ba4a3dd00781049f1c4a2d670de3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 86c7289fc61893ef2d106df7dfee1477fe24ced8
      https://github.com/Perl/perl5/commit/86c7289fc61893ef2d106df7dfee1477fe24ced8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 9a12c2f343d0ea932136d5522b00e933a444d4b7
      https://github.com/Perl/perl5/commit/9a12c2f343d0ea932136d5522b00e933a444d4b7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 9c07367b1820aea2097487429eceb324260afaa8
      https://github.com/Perl/perl5/commit/9c07367b1820aea2097487429eceb324260afaa8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 7375bfab285e96761f9d216fb7b7fab515207b66
      https://github.com/Perl/perl5/commit/7375bfab285e96761f9d216fb7b7fab515207b66
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 9258ee2e836d2cb6e76ee10cd7446ec1aa97f5df
      https://github.com/Perl/perl5/commit/9258ee2e836d2cb6e76ee10cd7446ec1aa97f5df
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 1aba140598af6f78bbacacd17ee9146b5c4c87ef
      https://github.com/Perl/perl5/commit/1aba140598af6f78bbacacd17ee9146b5c4c87ef
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 092cd7cac45763ec28740b5eec8b4067813fdf7d
      https://github.com/Perl/perl5/commit/092cd7cac45763ec28740b5eec8b4067813fdf7d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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

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


  Commit: b1675a96d5b71175d819bb97eaf5d6c6b9a74482
      https://github.com/Perl/perl5/commit/b1675a96d5b71175d819bb97eaf5d6c6b9a74482
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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

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

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

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


  Commit: 2ed670523d28f7e92f06c59f483179399dc16d49
      https://github.com/Perl/perl5/commit/2ed670523d28f7e92f06c59f483179399dc16d49
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 862ffef79c181fcbe9f77b585f8a15fbdc9cab96
      https://github.com/Perl/perl5/commit/862ffef79c181fcbe9f77b585f8a15fbdc9cab96
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 4d33729a7f43750f66b98eab49b518e01fbe5916
      https://github.com/Perl/perl5/commit/4d33729a7f43750f66b98eab49b518e01fbe5916
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 5ebb57436b3e1707bed16876424af90951272ea7
      https://github.com/Perl/perl5/commit/5ebb57436b3e1707bed16876424af90951272ea7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 5a1dba57a889acfc110168a82ff14531555dd3cb
      https://github.com/Perl/perl5/commit/5a1dba57a889acfc110168a82ff14531555dd3cb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: e7c184e6b00ab6e5d8a4e03d9fa34a18438bca5f
      https://github.com/Perl/perl5/commit/e7c184e6b00ab6e5d8a4e03d9fa34a18438bca5f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 7e2d2c3ef805bd430fc579433a0329d73e57f0c1
      https://github.com/Perl/perl5/commit/7e2d2c3ef805bd430fc579433a0329d73e57f0c1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 0b0e168374dd1134802e2cba76b6a9196dbc708d
      https://github.com/Perl/perl5/commit/0b0e168374dd1134802e2cba76b6a9196dbc708d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 65d397fce738737a72abcefa7231b632dc55bb48
      https://github.com/Perl/perl5/commit/65d397fce738737a72abcefa7231b632dc55bb48
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: e8ae32691eb27b8d4f8f64299b5680f1797c9978
      https://github.com/Perl/perl5/commit/e8ae32691eb27b8d4f8f64299b5680f1797c9978
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: ea2c9e874de4e2d474803168fdb15f85cb479605
      https://github.com/Perl/perl5/commit/ea2c9e874de4e2d474803168fdb15f85cb479605
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: f9cc06c69973898fdac0ac57f350fdba2afcf333
      https://github.com/Perl/perl5/commit/f9cc06c69973898fdac0ac57f350fdba2afcf333
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: c853ecab6761de8bdc899e21bb24f0d2c010678f
      https://github.com/Perl/perl5/commit/c853ecab6761de8bdc899e21bb24f0d2c010678f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: d78f555d9860e7d7094b706a2030e1ecd3cf685f
      https://github.com/Perl/perl5/commit/d78f555d9860e7d7094b706a2030e1ecd3cf685f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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

Properly indent some nested preprocessor directives


  Commit: beb7d4255d674a8b886f6c3c476429275ec78df8
      https://github.com/Perl/perl5/commit/beb7d4255d674a8b886f6c3c476429275ec78df8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 3e4396e25e497524ffc9d5550863d04568d09911
      https://github.com/Perl/perl5/commit/3e4396e25e497524ffc9d5550863d04568d09911
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 2e8e70a72fa6d70e69f500230c1d8e631a97ca84
      https://github.com/Perl/perl5/commit/2e8e70a72fa6d70e69f500230c1d8e631a97ca84
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 6d60908d7c46cd1a1c33eb786bd9b0f348a13dd1
      https://github.com/Perl/perl5/commit/6d60908d7c46cd1a1c33eb786bd9b0f348a13dd1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: a9feb73adc9e8572c8fe176abcdf4acccf4229a3
      https://github.com/Perl/perl5/commit/a9feb73adc9e8572c8fe176abcdf4acccf4229a3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 1007868317c4bbefda57963d85726f3465f49c0f
      https://github.com/Perl/perl5/commit/1007868317c4bbefda57963d85726f3465f49c0f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: e4a9d4c0b48a53ea51eb29782b7f0e973fc9ba62
      https://github.com/Perl/perl5/commit/e4a9d4c0b48a53ea51eb29782b7f0e973fc9ba62
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 05e4879fe840fd074e5405db3d7a9061c9527ba6
      https://github.com/Perl/perl5/commit/05e4879fe840fd074e5405db3d7a9061c9527ba6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 00e65ff48e8a9566bc8120ea5b0fd46921af5f12
      https://github.com/Perl/perl5/commit/00e65ff48e8a9566bc8120ea5b0fd46921af5f12
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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

This allows some preprocessor conditionals to be removed


  Commit: e38e774b0950f321467a2c5ac77460b64bf422f6
      https://github.com/Perl/perl5/commit/e38e774b0950f321467a2c5ac77460b64bf422f6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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

strEQ and && already return booleans


  Commit: 4d98e20d3096a0ef47617c9a832e5ffe2b51fbd7
      https://github.com/Perl/perl5/commit/4d98e20d3096a0ef47617c9a832e5ffe2b51fbd7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 3fde4c314fafc7786f0427eb2aa344b2c8256ad9
      https://github.com/Perl/perl5/commit/3fde4c314fafc7786f0427eb2aa344b2c8256ad9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: bb36b3c94d79a029a95becd64d3dac1aea68a989
      https://github.com/Perl/perl5/commit/bb36b3c94d79a029a95becd64d3dac1aea68a989
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8dc07a160fa22f9f3b8a3597a54c187e7ce99884
      https://github.com/Perl/perl5/commit/8dc07a160fa22f9f3b8a3597a54c187e7ce99884
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 9986a7ce83b7560a8c10a4fdec3423b9ee254ffa
      https://github.com/Perl/perl5/commit/9986a7ce83b7560a8c10a4fdec3423b9ee254ffa
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8fb7615d4a3dd88c035034f221e2eaf927dc1e8c
      https://github.com/Perl/perl5/commit/8fb7615d4a3dd88c035034f221e2eaf927dc1e8c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

This adds some compile safety to these.


  Commit: ba92a19dbb21e4635d5fa3e312a4ebae129c3e9b
      https://github.com/Perl/perl5/commit/ba92a19dbb21e4635d5fa3e312a4ebae129c3e9b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 7e36d8ce346067a4b6d0c77aa58bc8a8555f08fd
      https://github.com/Perl/perl5/commit/7e36d8ce346067a4b6d0c77aa58bc8a8555f08fd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 2222eaff655b7dc8e5276f18a81b84f28b5a6aaf
      https://github.com/Perl/perl5/commit/2222eaff655b7dc8e5276f18a81b84f28b5a6aaf
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 114df90d4e2d9fb0a117c18cc4d6297278357297
      https://github.com/Perl/perl5/commit/114df90d4e2d9fb0a117c18cc4d6297278357297
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 190a73cd8787f1b0a5da46d75d24197370ad6c30
      https://github.com/Perl/perl5/commit/190a73cd8787f1b0a5da46d75d24197370ad6c30
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 75e48c400d5dfee63f2a3650a29b97e98a05cfb2
      https://github.com/Perl/perl5/commit/75e48c400d5dfee63f2a3650a29b97e98a05cfb2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 0aad776a7038fcdb765113feeda33bf9a68d20f9
      https://github.com/Perl/perl5/commit/0aad776a7038fcdb765113feeda33bf9a68d20f9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 96b8c8e6934f4e16e8a543943695f2b1cf7d7558
      https://github.com/Perl/perl5/commit/96b8c8e6934f4e16e8a543943695f2b1cf7d7558
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: a8a6510c083a0e5f42c7fe706c779ad58dc88ade
      https://github.com/Perl/perl5/commit/a8a6510c083a0e5f42c7fe706c779ad58dc88ade
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 3b99b339c71016933db110f9b986d3485d37592a
      https://github.com/Perl/perl5/commit/3b99b339c71016933db110f9b986d3485d37592a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 9fce6145c40b86a2d2629c63449b84c6fe111189
      https://github.com/Perl/perl5/commit/9fce6145c40b86a2d2629c63449b84c6fe111189
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 0db0d6371453f7ef4a0b5a4370ce29d18ffdde51
      https://github.com/Perl/perl5/commit/0db0d6371453f7ef4a0b5a4370ce29d18ffdde51
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 42de373799b0dfa0d34f5164fad0346906f7ca97
      https://github.com/Perl/perl5/commit/42de373799b0dfa0d34f5164fad0346906f7ca97
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 40d791b4d1226ccecb078db4f635497f25edfc81
      https://github.com/Perl/perl5/commit/40d791b4d1226ccecb078db4f635497f25edfc81
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8205b09752cafaed782d0c4ab0d3822129314e7e
      https://github.com/Perl/perl5/commit/8205b09752cafaed782d0c4ab0d3822129314e7e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 7ae0137da185b9fa50bf2e6ee8ffd1ea79dd95ee
      https://github.com/Perl/perl5/commit/7ae0137da185b9fa50bf2e6ee8ffd1ea79dd95ee
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 196ae7bdf76ab7905f2a491e975a0f38f728c3eb
      https://github.com/Perl/perl5/commit/196ae7bdf76ab7905f2a491e975a0f38f728c3eb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: e02a4ee93b101e2f287a4f99d0f60366ce4fc258
      https://github.com/Perl/perl5/commit/e02a4ee93b101e2f287a4f99d0f60366ce4fc258
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: c4bf2acfaffe1bfe9b731f2e1166d776eaca8569
      https://github.com/Perl/perl5/commit/c4bf2acfaffe1bfe9b731f2e1166d776eaca8569
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 84f5896dc53c3ef25a31b81952af899efb2067e5
      https://github.com/Perl/perl5/commit/84f5896dc53c3ef25a31b81952af899efb2067e5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M mg.c

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

Indent newly formed block from the previous commit.


  Commit: 26e46752dcfe9f2a0795ee8d6f5fe363ce16755f
      https://github.com/Perl/perl5/commit/26e46752dcfe9f2a0795ee8d6f5fe363ce16755f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 3c77ee8a8b73b47e7036714b3abee91eea03a52f
      https://github.com/Perl/perl5/commit/3c77ee8a8b73b47e7036714b3abee91eea03a52f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 756b1982570da9916d3dbd16e333b031a3a41460
      https://github.com/Perl/perl5/commit/756b1982570da9916d3dbd16e333b031a3a41460
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: a09688e5869e37910b813c1b384534dae88402e9
      https://github.com/Perl/perl5/commit/a09688e5869e37910b813c1b384534dae88402e9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8928dfc6206adee01ea721999e9dadc308d1dfbd
      https://github.com/Perl/perl5/commit/8928dfc6206adee01ea721999e9dadc308d1dfbd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 9c10db8512206f54de7db6cb391965644e390da9
      https://github.com/Perl/perl5/commit/9c10db8512206f54de7db6cb391965644e390da9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 4234693f0bfe3fde6715789b087f14975b25d27e
      https://github.com/Perl/perl5/commit/4234693f0bfe3fde6715789b087f14975b25d27e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 88b924b66b631118f4542ec710d33f94e0b945ff
      https://github.com/Perl/perl5/commit/88b924b66b631118f4542ec710d33f94e0b945ff
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8067a938916743ed8f2313a8768b5a86b47649fb
      https://github.com/Perl/perl5/commit/8067a938916743ed8f2313a8768b5a86b47649fb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: dbf06d662ade204a53c3302e1a0c5bb600955cbc
      https://github.com/Perl/perl5/commit/dbf06d662ade204a53c3302e1a0c5bb600955cbc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: d64940469e7bbc619578442e7eacce02541ff1b5
      https://github.com/Perl/perl5/commit/d64940469e7bbc619578442e7eacce02541ff1b5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8850a5205391a6333aec93ba791d5d33c33f3213
      https://github.com/Perl/perl5/commit/8850a5205391a6333aec93ba791d5d33c33f3213
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 30a63d67bf6fe25092d36c3b14a6f8f2a1d73c7f
      https://github.com/Perl/perl5/commit/30a63d67bf6fe25092d36c3b14a6f8f2a1d73c7f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: b16faa0d0f9c0c8a23eab6a3086d733165e5f1b7
      https://github.com/Perl/perl5/commit/b16faa0d0f9c0c8a23eab6a3086d733165e5f1b7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 2440597aca7be851bf7fbe662da67a0152a527c1
      https://github.com/Perl/perl5/commit/2440597aca7be851bf7fbe662da67a0152a527c1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: f8c3562246bb5a952a63154b934ab8ec0d3e8a4f
      https://github.com/Perl/perl5/commit/f8c3562246bb5a952a63154b934ab8ec0d3e8a4f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: eafefe664a2964141d8e19fec6cd282602c9f48f
      https://github.com/Perl/perl5/commit/eafefe664a2964141d8e19fec6cd282602c9f48f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: dce978054205a5b8f86b19e3c574b89466b9b97e
      https://github.com/Perl/perl5/commit/dce978054205a5b8f86b19e3c574b89466b9b97e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 7311e8c4f19f1f82b33bc649537b55c1d552447d
      https://github.com/Perl/perl5/commit/7311e8c4f19f1f82b33bc649537b55c1d552447d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 134dfdd1cb458b53d14c781e5ce76f4aa6440b5d
      https://github.com/Perl/perl5/commit/134dfdd1cb458b53d14c781e5ce76f4aa6440b5d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 87ff69b20de33b87477177f8bd1f550c78e8b132
      https://github.com/Perl/perl5/commit/87ff69b20de33b87477177f8bd1f550c78e8b132
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: ef6a352b78e7c225cee7aaed255577e42febba7f
      https://github.com/Perl/perl5/commit/ef6a352b78e7c225cee7aaed255577e42febba7f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 66065e008d1c51aa7d2b5be40bf87df9965060dc
      https://github.com/Perl/perl5/commit/66065e008d1c51aa7d2b5be40bf87df9965060dc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M lib/locale.t

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


  Commit: 7a319e885b7ce4ae2d24fb2fdb24416eb7b3686d
      https://github.com/Perl/perl5/commit/7a319e885b7ce4ae2d24fb2fdb24416eb7b3686d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 51ce995c71368e91533d416b6dbaf35650298e43
      https://github.com/Perl/perl5/commit/51ce995c71368e91533d416b6dbaf35650298e43
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

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


  Commit: 3756076925502d51877ed6b9914f7ca456b6699e
      https://github.com/Perl/perl5/commit/3756076925502d51877ed6b9914f7ca456b6699e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

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


  Commit: 35744e9f1c8106b70cb8e5d800bf0ec156e9e884
      https://github.com/Perl/perl5/commit/35744e9f1c8106b70cb8e5d800bf0ec156e9e884
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 9db40098b48680c7c18d700bb11bbff910ed0576
      https://github.com/Perl/perl5/commit/9db40098b48680c7c18d700bb11bbff910ed0576
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8b698d65394900657cb30547e4d1121d06140a09
      https://github.com/Perl/perl5/commit/8b698d65394900657cb30547e4d1121d06140a09
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 4d34bbb1c44a8b3b159e93827ea4b877da81617f
      https://github.com/Perl/perl5/commit/4d34bbb1c44a8b3b159e93827ea4b877da81617f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 4751b1168ad04f0c253a6af275a8dd21a3da558b
      https://github.com/Perl/perl5/commit/4751b1168ad04f0c253a6af275a8dd21a3da558b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: a1b952d056fc3bcdd86ca29359333f96f678f60c
      https://github.com/Perl/perl5/commit/a1b952d056fc3bcdd86ca29359333f96f678f60c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: c24cab4c9b06e99d975684a68bfc93d92a60de34
      https://github.com/Perl/perl5/commit/c24cab4c9b06e99d975684a68bfc93d92a60de34
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 2a0a7867d17a0c0b22da7740e0d20fe6dc558674
      https://github.com/Perl/perl5/commit/2a0a7867d17a0c0b22da7740e0d20fe6dc558674
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 8529c1ceb3e73160c9534c466fdeb22bc6f28d49
      https://github.com/Perl/perl5/commit/8529c1ceb3e73160c9534c466fdeb22bc6f28d49
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 4c4fc2b581a0e82e97bae6a182dfecf1b739f5cc
      https://github.com/Perl/perl5/commit/4c4fc2b581a0e82e97bae6a182dfecf1b739f5cc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: fca7124dd9651500bd2e98387bf504d6071424e0
      https://github.com/Perl/perl5/commit/fca7124dd9651500bd2e98387bf504d6071424e0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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

This simplifies slightly, and will allow further simplification


  Commit: 53e8c621e3a9e5773de88cde314fd8e477ff7a38
      https://github.com/Perl/perl5/commit/53e8c621e3a9e5773de88cde314fd8e477ff7a38
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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

To enable future simplifications


  Commit: 89930d09f163cef3178284f4ac17a942634d9147
      https://github.com/Perl/perl5/commit/89930d09f163cef3178284f4ac17a942634d9147
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

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


  Commit: 6b40f13a9239e5d285e9c62c8e58f1356d76cb11
      https://github.com/Perl/perl5/commit/6b40f13a9239e5d285e9c62c8e58f1356d76cb11
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: f541f56365dea9772c50149820e755aa39d51a8c
      https://github.com/Perl/perl5/commit/f541f56365dea9772c50149820e755aa39d51a8c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M cygwin/cygwin.c

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


  Commit: 6826b560f79d4584183325487fdd8794a88298e7
      https://github.com/Perl/perl5/commit/6826b560f79d4584183325487fdd8794a88298e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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

Previous commits have left this empty except for comments.


  Commit: 73d9b2294649175396b42102e97ae34cc05036eb
      https://github.com/Perl/perl5/commit/73d9b2294649175396b42102e97ae34cc05036eb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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


  Commit: a2f7b4a00867f37fd553bdd73a7e160faef96e04
      https://github.com/Perl/perl5/commit/a2f7b4a00867f37fd553bdd73a7e160faef96e04
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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


  Commit: acff6cbb706b92cdf68b51eedf12de26ac715a95
      https://github.com/Perl/perl5/commit/acff6cbb706b92cdf68b51eedf12de26ac715a95
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M pp.c

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


  Commit: 28d5a3b5482bb3f31c5eca6ee724311e925c7845
      https://github.com/Perl/perl5/commit/28d5a3b5482bb3f31c5eca6ee724311e925c7845
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 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: 67d5ac0dd6e47fcdc4373c47532abfb1b8b829dd
      https://github.com/Perl/perl5/commit/67d5ac0dd6e47fcdc4373c47532abfb1b8b829dd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M inline.h
    M locale.c

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


  Commit: 6961765a3ad37d79f9e9996ca762a1b7804ad425
      https://github.com/Perl/perl5/commit/6961765a3ad37d79f9e9996ca762a1b7804ad425
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 96a819328b633de6c815f82ef6c6bd1031700631
      https://github.com/Perl/perl5/commit/96a819328b633de6c815f82ef6c6bd1031700631
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 3b40761e6af6eb9b358fb842a77f47eb69b5e448
      https://github.com/Perl/perl5/commit/3b40761e6af6eb9b358fb842a77f47eb69b5e448
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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

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


  Commit: 5a4e55ea6839062a7767b0615bd2cf085b6e5a69
      https://github.com/Perl/perl5/commit/5a4e55ea6839062a7767b0615bd2cf085b6e5a69
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h
    M time64.c

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

These are subsumed by gwENVr_LOCALEr_LOCK created in the previous
commit.


  Commit: a8190ad76b3e82164bff63ada9b569d7aa82a229
      https://github.com/Perl/perl5/commit/a8190ad76b3e82164bff63ada9b569d7aa82a229
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

The old name was confusing.


  Commit: 15cdf517fd39d27489d8dee0a696bc9043aec3c3
      https://github.com/Perl/perl5/commit/15cdf517fd39d27489d8dee0a696bc9043aec3c3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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

So they are closer to related statements


  Commit: 313f7303542fc903b8d28957addfe137970af2de
      https://github.com/Perl/perl5/commit/313f7303542fc903b8d28957addfe137970af2de
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h
    M util.c

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

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

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

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


  Commit: 33626058a037675f43f776aeaa8716c08606ee99
      https://github.com/Perl/perl5/commit/33626058a037675f43f776aeaa8716c08606ee99
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M time64.c

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

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


  Commit: 50eca8b6d49a138481f776bb18701ee810b9dfa8
      https://github.com/Perl/perl5/commit/50eca8b6d49a138481f776bb18701ee810b9dfa8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M pp_sys.c

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


  Commit: 9e49b18e298940ed0ed645f27a8017dd4b700c46
      https://github.com/Perl/perl5/commit/9e49b18e298940ed0ed645f27a8017dd4b700c46
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M win32/win32.c

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

These could have races.


  Commit: 8a10a64cd2b9dd0c988a94beac32d3311fdde834
      https://github.com/Perl/perl5/commit/8a10a64cd2b9dd0c988a94beac32d3311fdde834
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M util.c

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

per the Posix standard


  Commit: 7e75ddfb5707e5b6819cd1303ecbc8f3d695ca00
      https://github.com/Perl/perl5/commit/7e75ddfb5707e5b6819cd1303ecbc8f3d695ca00
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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


  Commit: b7d44dabc50695c7009e77bc311a6fb2dade5eef
      https://github.com/Perl/perl5/commit/b7d44dabc50695c7009e77bc311a6fb2dade5eef
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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


  Commit: 3982b9e3d8e29b92257844ca2c0a06d90c77ef49
      https://github.com/Perl/perl5/commit/3982b9e3d8e29b92257844ca2c0a06d90c77ef49
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M os2/os2.c

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

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


  Commit: 0b199b2c3d502ff50a4b058aa39dd005208ca593
      https://github.com/Perl/perl5/commit/0b199b2c3d502ff50a4b058aa39dd005208ca593
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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


  Commit: 5f17d491056f250a73fea1544b1eb64290ceafdf
      https://github.com/Perl/perl5/commit/5f17d491056f250a73fea1544b1eb64290ceafdf
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

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


  Commit: 195a573a25b3f5447ad61d1ff0f7f7135892f013
      https://github.com/Perl/perl5/commit/195a573a25b3f5447ad61d1ff0f7f7135892f013
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

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


  Commit: 0bea8016236514a65b4427ff513ed0e71dbca44c
      https://github.com/Perl/perl5/commit/0bea8016236514a65b4427ff513ed0e71dbca44c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

Same msg as prev commit


  Commit: fa7ddd59ba8b5deee5352e9f180c97bb287fae23
      https://github.com/Perl/perl5/commit/fa7ddd59ba8b5deee5352e9f180c97bb287fae23
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

Same msg as prev commit


  Commit: 5603a7513418df8f5a8dceaf0e9a518a0a061625
      https://github.com/Perl/perl5/commit/5603a7513418df8f5a8dceaf0e9a518a0a061625
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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

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


  Commit: ff79e8bcbab920ba5a08eae682a461ba3bc9fb27
      https://github.com/Perl/perl5/commit/ff79e8bcbab920ba5a08eae682a461ba3bc9fb27
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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


  Commit: 7d3ed52c872efc552aacf6cf282d54fec06edbe7
      https://github.com/Perl/perl5/commit/7d3ed52c872efc552aacf6cf282d54fec06edbe7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M pod/perlhacktips.pod

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


  Commit: 69c4243ed8dd795da8878fe1bb10cc749e24a924
      https://github.com/Perl/perl5/commit/69c4243ed8dd795da8878fe1bb10cc749e24a924
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M dist/IO/IO.xs

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


  Commit: 44452bf39def339c5afad06ad8e2d7e99537e47f
      https://github.com/Perl/perl5/commit/44452bf39def339c5afad06ad8e2d7e99537e47f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M hints/freebsd.sh

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


  Commit: 9f5f76bf84f7898adc824259e653ccab70d2d50c
      https://github.com/Perl/perl5/commit/9f5f76bf84f7898adc824259e653ccab70d2d50c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M thread.h

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


  Commit: 34ae0355b9c06bd81d8034e000df8dd4281aff21
      https://github.com/Perl/perl5/commit/34ae0355b9c06bd81d8034e000df8dd4281aff21
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M thread.h

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


  Commit: 3ed069f3080a079eded136c7ef3d4914ced35f67
      https://github.com/Perl/perl5/commit/3ed069f3080a079eded136c7ef3d4914ced35f67
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M perl.h

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


  Commit: 9a73614017f9850072caaae4634dfa8cb0d07612
      https://github.com/Perl/perl5/commit/9a73614017f9850072caaae4634dfa8cb0d07612
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

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

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


Compare: https://github.com/Perl/perl5/compare/3ff60b66cb87...9a73614017f9



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