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[Perl/perl5] 6ea735: XXX craig Unixish.h, doshish.h: Reorderterminatio...

From:
Karl Williamson via perl5-changes
Date:
March 29, 2021 16:14
Subject:
[Perl/perl5] 6ea735: XXX craig Unixish.h, doshish.h: Reorderterminatio...
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/258ba7-8c163e@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: 6ea73504fdb00b41eb549efbe5e39b237ff56550
      https://github.com/Perl/perl5/commit/6ea73504fdb00b41eb549efbe5e39b237ff56550
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M dosish.h
    M unixish.h

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

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

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

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


  Commit: 0255faa32699038e4e81cffb8d0a1690715f83cc
      https://github.com/Perl/perl5/commit/0255faa32699038e4e81cffb8d0a1690715f83cc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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 Windows platforms will always fail because
they have multiple divergences from the Posix standard.  The macros that
implement the case changing/folding in handy.h take extra steps to bring
Windows code more into alignment with Posix.  Those are too complicated
to easily duplicate the logic here.  The result of these checks is
looked at by our test suite, which has long, without anyone noticing,
skipped portions on Windows, even though handy.h should correct for
this.  So simply, don't do the checking under Windows, and find out what
handy.h has failed to fully correct for.


  Commit: 8276aeb8852501021f4992349a1dd5a81c4613af
      https://github.com/Perl/perl5/commit/8276aeb8852501021f4992349a1dd5a81c4613af
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M lib/locale_threads.t

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


  Commit: afbfc72158569e2165f659c2f292c3860c0c79d4
      https://github.com/Perl/perl5/commit/afbfc72158569e2165f659c2f292c3860c0c79d4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 9af44a9a0de4f0240f2ad27361c333766086d366
      https://github.com/Perl/perl5/commit/9af44a9a0de4f0240f2ad27361c333766086d366
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 6249a90e62f37c2b484c8aac44246921d6affb59
      https://github.com/Perl/perl5/commit/6249a90e62f37c2b484c8aac44246921d6affb59
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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


  Commit: afff1d4722ba0cb52d920858a88d87d20a85c5d5
      https://github.com/Perl/perl5/commit/afff1d4722ba0cb52d920858a88d87d20a85c5d5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

Replace isIDFIRST_LC and isWORD_CHAR_LC isIDFIRST_LC  with slightly
faster implementations.


  Commit: 918121efc1afff9b9d2370edf98c285ff5a27016
      https://github.com/Perl/perl5/commit/918121efc1afff9b9d2370edf98c285ff5a27016
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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 isIDFIRST_LC and isWORDCHAR_LC definitions for
non-Windows to match that platform superficially, though expanding to
what it previously did to.


  Commit: 26845391c0a3892ccea546b3fbba195429f488e7
      https://github.com/Perl/perl5/commit/26845391c0a3892ccea546b3fbba195429f488e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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


  Commit: ecfc6df8e9d726ae2c0820e87e1c7ad4a3dff5af
      https://github.com/Perl/perl5/commit/ecfc6df8e9d726ae2c0820e87e1c7ad4a3dff5af
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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


  Commit: 36e39309f98d0c480ce86f92db8cd16db4c54e50
      https://github.com/Perl/perl5/commit/36e39309f98d0c480ce86f92db8cd16db4c54e50
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 18677f99d13447a70e065f6f451a6e694bcfb27b
      https://github.com/Perl/perl5/commit/18677f99d13447a70e065f6f451a6e694bcfb27b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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 handy.h macro names to be C standard conformant

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


  Commit: 8573e8545909014dfbddb7721804d379608ce97e
      https://github.com/Perl/perl5/commit/8573e8545909014dfbddb7721804d379608ce97e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 2b9c97868d3984dcf620a059576385bb6d1d76ca
      https://github.com/Perl/perl5/commit/2b9c97868d3984dcf620a059576385bb6d1d76ca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 668c4c85e8407da49e2d6a650b0a2a34e54c7792
      https://github.com/Perl/perl5/commit/668c4c85e8407da49e2d6a650b0a2a34e54c7792
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: ef4929af6ac0d417a7bbc65713ca5c16a5e9552a
      https://github.com/Perl/perl5/commit/ef4929af6ac0d417a7bbc65713ca5c16a5e9552a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 40daa66af8374fe545081ccb11bbbf626b7f8be1
      https://github.com/Perl/perl5/commit/40daa66af8374fe545081ccb11bbbf626b7f8be1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 00946c10907198dff334023c8a586789decb752a
      https://github.com/Perl/perl5/commit/00946c10907198dff334023c8a586789decb752a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 1cedc526a4f85f01ac515d6d4c1c71203dc32c44
      https://github.com/Perl/perl5/commit/1cedc526a4f85f01ac515d6d4c1c71203dc32c44
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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

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


  Commit: b98f86242a3c8cd9dafbc71afda915677547529d
      https://github.com/Perl/perl5/commit/b98f86242a3c8cd9dafbc71afda915677547529d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 380ae49dba1bd6f14966bfdfefb8e1bf5617735a
      https://github.com/Perl/perl5/commit/380ae49dba1bd6f14966bfdfefb8e1bf5617735a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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

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

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

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


  Commit: 44e1cf22c8c781cb73c185a15c133a7561404b89
      https://github.com/Perl/perl5/commit/44e1cf22c8c781cb73c185a15c133a7561404b89
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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


  Commit: 00e8d344e9c25e393af0843d11d307a60ed64a65
      https://github.com/Perl/perl5/commit/00e8d344e9c25e393af0843d11d307a60ed64a65
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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


  Commit: afbf6a0737860f16cc31a46c0c3a9b422a12d6bb
      https://github.com/Perl/perl5/commit/afbf6a0737860f16cc31a46c0c3a9b422a12d6bb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

As a convenience to other code.


  Commit: ae0c4b25b07cce25ae1458d3e54b9a5ef3fa3405
      https://github.com/Perl/perl5/commit/ae0c4b25b07cce25ae1458d3e54b9a5ef3fa3405
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M regexec.c

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

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


  Commit: 5deead0141918dafa953064bb59dc567cbfb552d
      https://github.com/Perl/perl5/commit/5deead0141918dafa953064bb59dc567cbfb552d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M regexec.c

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

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


  Commit: f5e0cb3934d67b0a557aed8821f83f8ba2c7e6eb
      https://github.com/Perl/perl5/commit/f5e0cb3934d67b0a557aed8821f83f8ba2c7e6eb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 53e20b6431ea180467fa14ae92ec4da1d521eab3
      https://github.com/Perl/perl5/commit/53e20b6431ea180467fa14ae92ec4da1d521eab3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: b46cb95eb18c1301560483c156565487c3715a39
      https://github.com/Perl/perl5/commit/b46cb95eb18c1301560483c156565487c3715a39
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 3397708feb71c8baa1b475a7599de592478924ad
      https://github.com/Perl/perl5/commit/3397708feb71c8baa1b475a7599de592478924ad
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 0baf75d62b3bc9447eeb0fbffddfe9c1212c420d
      https://github.com/Perl/perl5/commit/0baf75d62b3bc9447eeb0fbffddfe9c1212c420d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 76dea694565788c85def663231954e44f7f913fa
      https://github.com/Perl/perl5/commit/76dea694565788c85def663231954e44f7f913fa
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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() is the base
level.


  Commit: 5a2d7966979d30b79106ddc30ffb91755d8c0490
      https://github.com/Perl/perl5/commit/5a2d7966979d30b79106ddc30ffb91755d8c0490
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: b646f54dddc86438bc3e095e5d38929895657a54
      https://github.com/Perl/perl5/commit/b646f54dddc86438bc3e095e5d38929895657a54
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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 edges of the locale-handling code; once found the index is used in
future bits of the current operation.


  Commit: cc43f9acf2e76bfee73940f5306ec83b01a7b5d9
      https://github.com/Perl/perl5/commit/cc43f9acf2e76bfee73940f5306ec83b01a7b5d9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 9039e419ca2a0705552dc57d97959d5d7a772d89
      https://github.com/Perl/perl5/commit/9039e419ca2a0705552dc57d97959d5d7a772d89
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 2cf272feaa77626840061241c5c8ba592a27884e
      https://github.com/Perl/perl5/commit/2cf272feaa77626840061241c5c8ba592a27884e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 7fee6f05919807cc0b17b384c14f8d02f48bf3a4
      https://github.com/Perl/perl5/commit/7fee6f05919807cc0b17b384c14f8d02f48bf3a4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 73ab9937b963bccd38e36b71bf651701e95750ea
      https://github.com/Perl/perl5/commit/73ab9937b963bccd38e36b71bf651701e95750ea
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 993e3987808e33d585e57c2da2b0653d0e581c8a
      https://github.com/Perl/perl5/commit/993e3987808e33d585e57c2da2b0653d0e581c8a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: d2dd2ea83b6a2599787a9f52e147b4ae9df3d5a8
      https://github.com/Perl/perl5/commit/d2dd2ea83b6a2599787a9f52e147b4ae9df3d5a8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 05bc3d5c5499de160e1198260a3b3665e0f64b0c
      https://github.com/Perl/perl5/commit/05bc3d5c5499de160e1198260a3b3665e0f64b0c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 1893617ecc5c7b54881ca8e5aae1526aa9ca6f0d
      https://github.com/Perl/perl5/commit/1893617ecc5c7b54881ca8e5aae1526aa9ca6f0d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 2c80b2fa308c03e889ceb32224ee0ee7f7ed43f6
      https://github.com/Perl/perl5/commit/2c80b2fa308c03e889ceb32224ee0ee7f7ed43f6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 2f1d169e120826ece99c6df79fb56dc724116c7f
      https://github.com/Perl/perl5/commit/2f1d169e120826ece99c6df79fb56dc724116c7f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 0102d1a049ff5c9716e891fc8e8c567ef77777da
      https://github.com/Perl/perl5/commit/0102d1a049ff5c9716e891fc8e8c567ef77777da
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: f4bedd653a2f070eb6fe4f1a68f21e6c4b586d2d
      https://github.com/Perl/perl5/commit/f4bedd653a2f070eb6fe4f1a68f21e6c4b586d2d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: e8bc7c057c79baeb8533bdbb593fea5ccff3ecff
      https://github.com/Perl/perl5/commit/e8bc7c057c79baeb8533bdbb593fea5ccff3ecff
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 6af8cbc53607ba4175eea8f1f39fa5786392239c
      https://github.com/Perl/perl5/commit/6af8cbc53607ba4175eea8f1f39fa5786392239c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 1f753f629dbc4d4cedbed89220dbb7d4235bf051
      https://github.com/Perl/perl5/commit/1f753f629dbc4d4cedbed89220dbb7d4235bf051
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 20507c802b326bc04a25322d440684049578dd51
      https://github.com/Perl/perl5/commit/20507c802b326bc04a25322d440684049578dd51
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 448a18fd7dc732b53ac87443741be134465bfaa7
      https://github.com/Perl/perl5/commit/448a18fd7dc732b53ac87443741be134465bfaa7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 6c2bdf064618b35d0f89b49db6e7366b5ce3cfd5
      https://github.com/Perl/perl5/commit/6c2bdf064618b35d0f89b49db6e7366b5ce3cfd5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 2b1d52973b1bcd3bd745302813114f03c69a08f5
      https://github.com/Perl/perl5/commit/2b1d52973b1bcd3bd745302813114f03c69a08f5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: d8e406295f23e02629fc29a75e76472490659b13
      https://github.com/Perl/perl5/commit/d8e406295f23e02629fc29a75e76472490659b13
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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
use it in other files.

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


  Commit: 15fdea7834c47ee93da2cb7f0d757326c7bdaa3b
      https://github.com/Perl/perl5/commit/15fdea7834c47ee93da2cb7f0d757326c7bdaa3b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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.  As part of this commit, constness is added to PL_curlocales[]

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

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


  Commit: 79df525fa8a422e67a2c4b2007dc0cba8572ca3c
      https://github.com/Perl/perl5/commit/79df525fa8a422e67a2c4b2007dc0cba8572ca3c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 94096ccd7f20ab78e083fdcccb0077f599d7b728
      https://github.com/Perl/perl5/commit/94096ccd7f20ab78e083fdcccb0077f599d7b728
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

This function is rewritten to handle LC_ALL, and to handle certain buggy
Win32 locale names.  This commit also calls it in appropriate places
where those buggy names could be returned.

setlocale() on Windows may return a locale that cannot be used as input
to a future setlocale().  This is contrary to the C89 standard, and
appears to have been an oversight corrected in the most recent Windows
version(s).

This commit solves the problem (as far as I know) by looking for the
problematic syntax and adjusting it.

I also rewrote the function to handle LC_ALL, which fixes that deficiency.

And, a change in that that I think is an improvement is that everything
starting with a \n is trimmed, instead of just a trailing \n being
chomped.


  Commit: f400a081863d86be110b23ee1493054431075806
      https://github.com/Perl/perl5/commit/f400a081863d86be110b23ee1493054431075806
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 10cd35ce401187f33bc759b65ff4923395ad5ec9
      https://github.com/Perl/perl5/commit/10cd35ce401187f33bc759b65ff4923395ad5ec9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXX debug stdized


  Commit: 650f4f2eb7de9b543a470fd3757e1b44e1647ab7
      https://github.com/Perl/perl5/commit/650f4f2eb7de9b543a470fd3757e1b44e1647ab7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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

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


  Commit: 00deab2e8ad151f983095688b83ce023598508a4
      https://github.com/Perl/perl5/commit/00deab2e8ad151f983095688b83ce023598508a4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 98e68bceb94ae533c94ba96de045639aaa94dcea
      https://github.com/Perl/perl5/commit/98e68bceb94ae533c94ba96de045639aaa94dcea
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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 is being done just for readability, as this extensive code in the
middle of something else distracts from the main point.

A goto is hence replaced by a recursive call.


  Commit: 75659ad189c53f288dfa5ae43bf6ec46df96e006
      https://github.com/Perl/perl5/commit/75659ad189c53f288dfa5ae43bf6ec46df96e006
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 8898462b719e804280844ae2cd2bf0322b2bf350
      https://github.com/Perl/perl5/commit/8898462b719e804280844ae2cd2bf0322b2bf350
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: e4bfbcdeb93018355bf7252d6c4372a8c90825ed
      https://github.com/Perl/perl5/commit/e4bfbcdeb93018355bf7252d6c4372a8c90825ed
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 42a1f9b9d318d5a26c7114460570fa877b63892d
      https://github.com/Perl/perl5/commit/42a1f9b9d318d5a26c7114460570fa877b63892d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 14944b2eb198fcd54c9daff606dade8d1d7c3f99
      https://github.com/Perl/perl5/commit/14944b2eb198fcd54c9daff606dade8d1d7c3f99
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: de979944ae5cbde290f6727b21992ffb13c0778c
      https://github.com/Perl/perl5/commit/de979944ae5cbde290f6727b21992ffb13c0778c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 4e869271ccbfb793f14d0578e6e958d13cda9c35
      https://github.com/Perl/perl5/commit/4e869271ccbfb793f14d0578e6e958d13cda9c35
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 3cec024a42e5126f484005db572259df29512172
      https://github.com/Perl/perl5/commit/3cec024a42e5126f484005db572259df29512172
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 76920cfb11f07b43a4a31ef39c0401a2f8b9cfe9
      https://github.com/Perl/perl5/commit/76920cfb11f07b43a4a31ef39c0401a2f8b9cfe9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 44c832f3294ced6b524fdef5618c3a47dea261d8
      https://github.com/Perl/perl5/commit/44c832f3294ced6b524fdef5618c3a47dea261d8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: b1823f83ffbffd3928c4ab7f49e295a782f88f7f
      https://github.com/Perl/perl5/commit/b1823f83ffbffd3928c4ab7f49e295a782f88f7f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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

Properly indent some nested preprocessor directives


  Commit: 59773f6390117f74e87a3f3abc17335e6b2c7c24
      https://github.com/Perl/perl5/commit/59773f6390117f74e87a3f3abc17335e6b2c7c24
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 8e85b21ee8ab25dd2e647f7af6cd463b3a919261
      https://github.com/Perl/perl5/commit/8e85b21ee8ab25dd2e647f7af6cd463b3a919261
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: e4ae8f89429ea051ca8432c680b01259a3998697
      https://github.com/Perl/perl5/commit/e4ae8f89429ea051ca8432c680b01259a3998697
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 89148cbb1634ebf6184722c8722f143715237fb2
      https://github.com/Perl/perl5/commit/89148cbb1634ebf6184722c8722f143715237fb2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 900357471d9716adbb5f5481896630f71f5eadbb
      https://github.com/Perl/perl5/commit/900357471d9716adbb5f5481896630f71f5eadbb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 598da246a61d65f77f6c1834bdb53241926f538c
      https://github.com/Perl/perl5/commit/598da246a61d65f77f6c1834bdb53241926f538c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: be2a31846496451fb4a5247a04d533f17bebd1f7
      https://github.com/Perl/perl5/commit/be2a31846496451fb4a5247a04d533f17bebd1f7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 19b175d9cf02357bd5e440a15cca4dff0f7e67c4
      https://github.com/Perl/perl5/commit/19b175d9cf02357bd5e440a15cca4dff0f7e67c4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 96379d7531701a990ded64bed8d67bb6f7136311
      https://github.com/Perl/perl5/commit/96379d7531701a990ded64bed8d67bb6f7136311
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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

This allows some preprocessor conditionals to be removed


  Commit: c5d51404c593cfabaabae74123a5db316c38044e
      https://github.com/Perl/perl5/commit/c5d51404c593cfabaabae74123a5db316c38044e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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

strEQ and && already return booleans


  Commit: dda3073e48017606ebfbc2ba59b778ddcaafd232
      https://github.com/Perl/perl5/commit/dda3073e48017606ebfbc2ba59b778ddcaafd232
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 3d7748840160769b04f94669dc827192a4ec33fc
      https://github.com/Perl/perl5/commit/3d7748840160769b04f94669dc827192a4ec33fc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 255422271334e8ff90b9d8eec10b3cacadca7936
      https://github.com/Perl/perl5/commit/255422271334e8ff90b9d8eec10b3cacadca7936
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: c64da2c6fadbcbadeefe78c59f4c09fdffb7b94d
      https://github.com/Perl/perl5/commit/c64da2c6fadbcbadeefe78c59f4c09fdffb7b94d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 9c50f6362ee73e6cb81c1752d91ce85947d5d37b
      https://github.com/Perl/perl5/commit/9c50f6362ee73e6cb81c1752d91ce85947d5d37b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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 that we aren't already in the desired locale before
changing locales. and does nothing if no change is needed.


  Commit: 9b98164937a80c43e7e2c15e3c926eaaf2d1e977
      https://github.com/Perl/perl5/commit/9b98164937a80c43e7e2c15e3c926eaaf2d1e977
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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

This is in preparation for the next commit


  Commit: 4c06c562ef4bcc8ec7455d6db72faefa3d09a6e2
      https://github.com/Perl/perl5/commit/4c06c562ef4bcc8ec7455d6db72faefa3d09a6e2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: df2ce4aeb1031899e562160c130e27017585038d
      https://github.com/Perl/perl5/commit/df2ce4aeb1031899e562160c130e27017585038d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 2758735016a9376aa29811140659ea511e0fb1bc
      https://github.com/Perl/perl5/commit/2758735016a9376aa29811140659ea511e0fb1bc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 68c1db7dd83034926f15eb9cb170da6045fd9fb9
      https://github.com/Perl/perl5/commit/68c1db7dd83034926f15eb9cb170da6045fd9fb9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 3e3f05d4a6a2c0a9f4081de0f7e1ebe9f52756f0
      https://github.com/Perl/perl5/commit/3e3f05d4a6a2c0a9f4081de0f7e1ebe9f52756f0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 294551212b9e036a57ed8fa7ca02b9bbee78ddca
      https://github.com/Perl/perl5/commit/294551212b9e036a57ed8fa7ca02b9bbee78ddca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: a6c6da0e63a9feb8e0105e83aac9f9c50bfc8c8c
      https://github.com/Perl/perl5/commit/a6c6da0e63a9feb8e0105e83aac9f9c50bfc8c8c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 8239672a6b7f1d863a465ae7ca8b7e60262f489c
      https://github.com/Perl/perl5/commit/8239672a6b7f1d863a465ae7ca8b7e60262f489c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 0a54ff9fddd325f695d3c263081edddd85a08328
      https://github.com/Perl/perl5/commit/0a54ff9fddd325f695d3c263081edddd85a08328
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 61461b9ce1e467762591ff165ab385abfdd678a6
      https://github.com/Perl/perl5/commit/61461b9ce1e467762591ff165ab385abfdd678a6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: f74efa36f7eff6eeaec4eba87e1087408ac6fc79
      https://github.com/Perl/perl5/commit/f74efa36f7eff6eeaec4eba87e1087408ac6fc79
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 016eda7e52b597ca6636237a86c26c72525d3a78
      https://github.com/Perl/perl5/commit/016eda7e52b597ca6636237a86c26c72525d3a78
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 033dc42688add7efb139957031463eb24d3340cc
      https://github.com/Perl/perl5/commit/033dc42688add7efb139957031463eb24d3340cc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 62ab69b08b2d094a64eaeb107b0f221a8991ce7e
      https://github.com/Perl/perl5/commit/62ab69b08b2d094a64eaeb107b0f221a8991ce7e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 397c796a75776ae30ff3c2ea4cbc9c99d8992da7
      https://github.com/Perl/perl5/commit/397c796a75776ae30ff3c2ea4cbc9c99d8992da7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 6cf408dd7a6cfbc42885d8fd0b01ad691c794c4c
      https://github.com/Perl/perl5/commit/6cf408dd7a6cfbc42885d8fd0b01ad691c794c4c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 69c606df4143fd24b74254d7d9ae9600d837483b
      https://github.com/Perl/perl5/commit/69c606df4143fd24b74254d7d9ae9600d837483b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: e185745f8da23bf210e3563cf048c8fd8e178717
      https://github.com/Perl/perl5/commit/e185745f8da23bf210e3563cf048c8fd8e178717
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: c6c282fb431aeba6e22c58f7f49bb0103f41b89d
      https://github.com/Perl/perl5/commit/c6c282fb431aeba6e22c58f7f49bb0103f41b89d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M mg.c

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

Indent newly formed block from the previous commit.


  Commit: 3817650a98c8148c3908f0dea5ebc95cd44ead3f
      https://github.com/Perl/perl5/commit/3817650a98c8148c3908f0dea5ebc95cd44ead3f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 4c1f725b9ac674bede2f0863835a92c99f0050f3
      https://github.com/Perl/perl5/commit/4c1f725b9ac674bede2f0863835a92c99f0050f3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 6969a962c4efe273ae43b4fa27f94a7764a1d388
      https://github.com/Perl/perl5/commit/6969a962c4efe273ae43b4fa27f94a7764a1d388
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 10b46ed94551c1a5fd7fba0dee07f65df42fd5ff
      https://github.com/Perl/perl5/commit/10b46ed94551c1a5fd7fba0dee07f65df42fd5ff
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 78afa0bb7493fab82f0a34390437b939cff82298
      https://github.com/Perl/perl5/commit/78afa0bb7493fab82f0a34390437b939cff82298
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: fab54399f65732a727bce020ed51bd6ec07cb9e2
      https://github.com/Perl/perl5/commit/fab54399f65732a727bce020ed51bd6ec07cb9e2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 5945455b95e0135bac612a00a1788aaaa1ff5e0e
      https://github.com/Perl/perl5/commit/5945455b95e0135bac612a00a1788aaaa1ff5e0e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 7806f4953b25064fa2b3b5e77bce0df211ec7bb4
      https://github.com/Perl/perl5/commit/7806f4953b25064fa2b3b5e77bce0df211ec7bb4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 6b3bf1efa81888f59c9c0db3108d6c7329cb69bb
      https://github.com/Perl/perl5/commit/6b3bf1efa81888f59c9c0db3108d6c7329cb69bb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 3535b583f59fb22b0524d9ace058f4e10562c43e
      https://github.com/Perl/perl5/commit/3535b583f59fb22b0524d9ace058f4e10562c43e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: b36340eb919b4e4b895bcca91fb05b5a968dece5
      https://github.com/Perl/perl5/commit/b36340eb919b4e4b895bcca91fb05b5a968dece5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 39a7605c87c0fb31b7a8e413da84da35751f1988
      https://github.com/Perl/perl5/commit/39a7605c87c0fb31b7a8e413da84da35751f1988
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXX PORCELAIN_SET not yet defined 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: 628b79d3833865da83b67809f8fcb8ea6a8bf6c4
      https://github.com/Perl/perl5/commit/628b79d3833865da83b67809f8fcb8ea6a8bf6c4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: d3ca1b75690775f06aaac94808beac6c684b7ed5
      https://github.com/Perl/perl5/commit/d3ca1b75690775f06aaac94808beac6c684b7ed5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: d83f917d3706762c17fd264691838b7f6b2bb5a8
      https://github.com/Perl/perl5/commit/d83f917d3706762c17fd264691838b7f6b2bb5a8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: f09eb440d41dceef0e9d8a0684f11e44d0045bbd
      https://github.com/Perl/perl5/commit/f09eb440d41dceef0e9d8a0684f11e44d0045bbd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: af327147f8c822114b47cae916577c577f391151
      https://github.com/Perl/perl5/commit/af327147f8c822114b47cae916577c577f391151
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 1d2b53322b12f61a96e1711a1d9496552ee685e7
      https://github.com/Perl/perl5/commit/1d2b53322b12f61a96e1711a1d9496552ee685e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 3a142bd99aff64d793eba457bed432e1c09606dc
      https://github.com/Perl/perl5/commit/3a142bd99aff64d793eba457bed432e1c09606dc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 887bf06f0264702a90a39c50207ac1ed6df3fa5b
      https://github.com/Perl/perl5/commit/887bf06f0264702a90a39c50207ac1ed6df3fa5b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 45628714589b64ac80cdc3a93abd64bf5abde6e1
      https://github.com/Perl/perl5/commit/45628714589b64ac80cdc3a93abd64bf5abde6e1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: df57bb8d9bd32bb31064293fb525939dcdb7e8cb
      https://github.com/Perl/perl5/commit/df57bb8d9bd32bb31064293fb525939dcdb7e8cb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: f056a7d026b7db4b69f4251ec3c07c785dac283a
      https://github.com/Perl/perl5/commit/f056a7d026b7db4b69f4251ec3c07c785dac283a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M lib/locale.t

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


  Commit: 99b13eb507c3ed7dbdc4051753166d43674cb3d4
      https://github.com/Perl/perl5/commit/99b13eb507c3ed7dbdc4051753166d43674cb3d4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 1a0a8e1736b59bcb0900d65081428720e3c58983
      https://github.com/Perl/perl5/commit/1a0a8e1736b59bcb0900d65081428720e3c58983
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 216edecb8f81b6a23bc62c1471dab20984ad4497
      https://github.com/Perl/perl5/commit/216edecb8f81b6a23bc62c1471dab20984ad4497
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: f26eea9b341f12803e8674f855371d49213647ba
      https://github.com/Perl/perl5/commit/f26eea9b341f12803e8674f855371d49213647ba
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

  Log Message:
  -----------
  locale.c: Improve debugging for mem_collxfrm()

This prints out more information, better organized.

It also moves up the info from -DLv to plain -DL


  Commit: caa5d016cd0dfebbbc5bdd59773000e8be184b19
      https://github.com/Perl/perl5/commit/caa5d016cd0dfebbbc5bdd59773000e8be184b19
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add debug statement for collation failure

Perhaps this should be a warning to the user that we couldn't calculate
collation info for the locale, but at least there should be a way to
get that info from a DEBUG statement


  Commit: e7e1d4272bcf068c58a7ddacb9a84b78f7abe97c
      https://github.com/Perl/perl5/commit/e7e1d4272bcf068c58a7ddacb9a84b78f7abe97c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 9b4172965ab0f64bb0befe73e3ba716969e9eb75
      https://github.com/Perl/perl5/commit/9b4172965ab0f64bb0befe73e3ba716969e9eb75
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 8d89159a06ea7d1057cbd95e84995b148cf2a136
      https://github.com/Perl/perl5/commit/8d89159a06ea7d1057cbd95e84995b148cf2a136
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 0d8b72b4e3ab63035f3dc9bf767a0444a4b7ae58
      https://github.com/Perl/perl5/commit/0d8b72b4e3ab63035f3dc9bf767a0444a4b7ae58
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M perl.h

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

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


  Commit: 4db711429a44fe2e322b0303b19314864aa346a5
      https://github.com/Perl/perl5/commit/4db711429a44fe2e322b0303b19314864aa346a5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 2918bdf378345fc5bf4efd14992891cab88317cd
      https://github.com/Perl/perl5/commit/2918bdf378345fc5bf4efd14992891cab88317cd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 4ab5f5ccaf6e91c8426e4963ddb07cf3353ceb0c
      https://github.com/Perl/perl5/commit/4ab5f5ccaf6e91c8426e4963ddb07cf3353ceb0c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: eda0e3973b5bfa35f9c55638b31ea533dbfc0e64
      https://github.com/Perl/perl5/commit/eda0e3973b5bfa35f9c55638b31ea533dbfc0e64
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 490333daa63c7a0ee63131a82efc044ef55e616d
      https://github.com/Perl/perl5/commit/490333daa63c7a0ee63131a82efc044ef55e616d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: bc24622d8b8a2d3edb45ef1542841da691a862f2
      https://github.com/Perl/perl5/commit/bc24622d8b8a2d3edb45ef1542841da691a862f2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: cea3d2202f8fa65fd7d51e16fd7e1e1f4ee7c716
      https://github.com/Perl/perl5/commit/cea3d2202f8fa65fd7d51e16fd7e1e1f4ee7c716
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

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

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

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

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

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


  Commit: dd09e002be3f3f24ad15f6572c0a29e96c13f23d
      https://github.com/Perl/perl5/commit/dd09e002be3f3f24ad15f6572c0a29e96c13f23d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M perl.h

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

This simplifies slightly, and will allow further simplification


  Commit: 3b6f1bb4754e0f8e8ce9673834bbf3a789db8d62
      https://github.com/Perl/perl5/commit/3b6f1bb4754e0f8e8ce9673834bbf3a789db8d62
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M perl.h

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

To enable future simplifications


  Commit: c749badc80b3950bbee20a4611cc3bf244ff2359
      https://github.com/Perl/perl5/commit/c749badc80b3950bbee20a4611cc3bf244ff2359
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 59f26365b18377f96a5994c099730001378fd838
      https://github.com/Perl/perl5/commit/59f26365b18377f96a5994c099730001378fd838
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 47482e73e5b0803fbd484ff886d27b59af1e2c30
      https://github.com/Perl/perl5/commit/47482e73e5b0803fbd484ff886d27b59af1e2c30
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: fdd6fc56d8f8aab97ed5965e191998a86a918bae
      https://github.com/Perl/perl5/commit/fdd6fc56d8f8aab97ed5965e191998a86a918bae
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M pp.c

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


  Commit: 7c607717fab4c640c9c9214beca5b848cd2910b6
      https://github.com/Perl/perl5/commit/7c607717fab4c640c9c9214beca5b848cd2910b6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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

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

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

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


  Commit: 5dc125b5462da70ee88cd9eea22e83d0e96ea640
      https://github.com/Perl/perl5/commit/5dc125b5462da70ee88cd9eea22e83d0e96ea640
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M inline.h
    M locale.c

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


  Commit: a844c964f8d2518d0da392239767158cda0d46ba
      https://github.com/Perl/perl5/commit/a844c964f8d2518d0da392239767158cda0d46ba
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 44ca35e6b75ac4b1bf67b9ac8047ffc9098ae71e
      https://github.com/Perl/perl5/commit/44ca35e6b75ac4b1bf67b9ac8047ffc9098ae71e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: c5061c3516678dfd5d2e08be65653e921b369a9f
      https://github.com/Perl/perl5/commit/c5061c3516678dfd5d2e08be65653e921b369a9f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 3ba2b7554c4b4f92a13d70e480e52995761f4e8b
      https://github.com/Perl/perl5/commit/3ba2b7554c4b4f92a13d70e480e52995761f4e8b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 1d1d5926656cb6dbfd38732a1f6a32245807f084
      https://github.com/Perl/perl5/commit/1d1d5926656cb6dbfd38732a1f6a32245807f084
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 88d2151c3cc13f325a4be8e53e38c408f212e955
      https://github.com/Perl/perl5/commit/88d2151c3cc13f325a4be8e53e38c408f212e955
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M perl.h

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

So they are closer to related statements


  Commit: a9549478648b700b6cdfcc1c78cf632152390f12
      https://github.com/Perl/perl5/commit/a9549478648b700b6cdfcc1c78cf632152390f12
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: f73c9cbd909a8e981a2cbc78a41a0ecee01eb097
      https://github.com/Perl/perl5/commit/f73c9cbd909a8e981a2cbc78a41a0ecee01eb097
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 81a31c36db9dfeb4a64ea4b105bd048f6fc19f15
      https://github.com/Perl/perl5/commit/81a31c36db9dfeb4a64ea4b105bd048f6fc19f15
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M pp_sys.c

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


  Commit: da8cf37013b8a26abf53e3b80c2bbe38c6ca2d0e
      https://github.com/Perl/perl5/commit/da8cf37013b8a26abf53e3b80c2bbe38c6ca2d0e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M win32/win32.c

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

These could have races.


  Commit: 808df927e2fde5949a52b298b59a0896fd634a44
      https://github.com/Perl/perl5/commit/808df927e2fde5949a52b298b59a0896fd634a44
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

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


  Commit: 9b7212c5c0cd578e213c5a62fe1d22859d889313
      https://github.com/Perl/perl5/commit/9b7212c5c0cd578e213c5a62fe1d22859d889313
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M util.c

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

per the Posix standard


  Commit: ffd810b3cffd15ccdfa272388d5c6571063f93a2
      https://github.com/Perl/perl5/commit/ffd810b3cffd15ccdfa272388d5c6571063f93a2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M util.c

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


  Commit: c9bc4b65a94ab1cd1c5c06a138c33705c2d3d166
      https://github.com/Perl/perl5/commit/c9bc4b65a94ab1cd1c5c06a138c33705c2d3d166
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M cygwin/cygwin.c

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


  Commit: 135b2b6b6a00b48860906a351f4980382e14eba0
      https://github.com/Perl/perl5/commit/135b2b6b6a00b48860906a351f4980382e14eba0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 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: 481733d5d4835d4bc5e6fafd4efe69a899e6bde1
      https://github.com/Perl/perl5/commit/481733d5d4835d4bc5e6fafd4efe69a899e6bde1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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


  Commit: 9dbcadedf53db390a49de22142ae2eee311fb4b7
      https://github.com/Perl/perl5/commit/9dbcadedf53db390a49de22142ae2eee311fb4b7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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


  Commit: 360c26893b3c97e936ff0a5ddcaffbab0edd2f74
      https://github.com/Perl/perl5/commit/360c26893b3c97e936ff0a5ddcaffbab0edd2f74
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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

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


  Commit: b9dfe4fa3119b6c7257e967a11663dfaab572a34
      https://github.com/Perl/perl5/commit/b9dfe4fa3119b6c7257e967a11663dfaab572a34
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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

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


  Commit: d2360c482e016cf82a116275e5742981518ed3c4
      https://github.com/Perl/perl5/commit/d2360c482e016cf82a116275e5742981518ed3c4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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

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


  Commit: dedf4fa4b6061cde2be7387c3b67b2a4b9c66db5
      https://github.com/Perl/perl5/commit/dedf4fa4b6061cde2be7387c3b67b2a4b9c66db5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M pod/perlhacktips.pod

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


  Commit: 4ba486a52150d187aa3aa69fbe4ec0e62894de2d
      https://github.com/Perl/perl5/commit/4ba486a52150d187aa3aa69fbe4ec0e62894de2d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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


  Commit: dd18c0bbd158e04802b6f7b6beac49845e13f28c
      https://github.com/Perl/perl5/commit/dd18c0bbd158e04802b6f7b6beac49845e13f28c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M hints/freebsd.sh

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


  Commit: 74e3f9fe9f9915766ab03eb8b7b994096bc6bf2e
      https://github.com/Perl/perl5/commit/74e3f9fe9f9915766ab03eb8b7b994096bc6bf2e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M thread.h

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


  Commit: b9f90492f02e6fab3df9f977c574d765bd6ccd13
      https://github.com/Perl/perl5/commit/b9f90492f02e6fab3df9f977c574d765bd6ccd13
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M thread.h

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


  Commit: 02d010d21b68eafed31aeb75664d546839c83f43
      https://github.com/Perl/perl5/commit/02d010d21b68eafed31aeb75664d546839c83f43
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M perl.h

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


  Commit: fec648641ec952e5829adb9fe27c564bd8508b78
      https://github.com/Perl/perl5/commit/fec648641ec952e5829adb9fe27c564bd8508b78
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs
    M handy.h
    M iperlsys.h
    M locale.c
    M perl.h
    M regen/reentr.pl
    M regexec.c
    M sv.c
    M util.c

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


  Commit: 3e643bfc96329cdcddb518acabecbee3891b1573
      https://github.com/Perl/perl5/commit/3e643bfc96329cdcddb518acabecbee3891b1573
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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


  Commit: 4d425b516677d463711679c95ba4c4a0fab08b73
      https://github.com/Perl/perl5/commit/4d425b516677d463711679c95ba4c4a0fab08b73
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 793b0b572f84080be404f11132afa97c10e2704e
      https://github.com/Perl/perl5/commit/793b0b572f84080be404f11132afa97c10e2704e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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


  Commit: d66caaa7e7f2ac170caf3c6e208f4295ad3aede4
      https://github.com/Perl/perl5/commit/d66caaa7e7f2ac170caf3c6e208f4295ad3aede4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M t/run/locale.t

  Log Message:
  -----------
  t/run/locale.t


  Commit: 5ba554294a72e277ab734c207cc7194b1ae128be
      https://github.com/Perl/perl5/commit/5ba554294a72e277ab734c207cc7194b1ae128be
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M t/run/locale.t

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

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


  Commit: 4e889ccabc82bbf44e728e1435024c0ca43c537a
      https://github.com/Perl/perl5/commit/4e889ccabc82bbf44e728e1435024c0ca43c537a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M t/run/locale.t

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


  Commit: 78ec4bd100763c44f6a6679e49e6afebd5013ea8
      https://github.com/Perl/perl5/commit/78ec4bd100763c44f6a6679e49e6afebd5013ea8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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

Remove some blank lines that don't contribute to readability


  Commit: 4116c2eba689ca79a487adef3c2f61773096b758
      https://github.com/Perl/perl5/commit/4116c2eba689ca79a487adef3c2f61773096b758
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

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


  Commit: f06bee67fbc1563230f605956cead418ed7dca78
      https://github.com/Perl/perl5/commit/f06bee67fbc1563230f605956cead418ed7dca78
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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

This code should no longer be necessary; but verify


  Commit: fb76e1eb1e654d42f0f86bc839de1b08318a3dce
      https://github.com/Perl/perl5/commit/fb76e1eb1e654d42f0f86bc839de1b08318a3dce
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M t/loc_tools.pl

  Log Message:
  -----------
  XXX loc_tools: debug, white space


  Commit: d1ef52b37992cc5058ba5937b77aa78c4328fb69
      https://github.com/Perl/perl5/commit/d1ef52b37992cc5058ba5937b77aa78c4328fb69
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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


  Commit: 921c9cf3371323d174b72e0485aeafbabf6fe64c
      https://github.com/Perl/perl5/commit/921c9cf3371323d174b72e0485aeafbabf6fe64c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: aa52e471bd70bce0bab95d7826650249cd24a615
      https://github.com/Perl/perl5/commit/aa52e471bd70bce0bab95d7826650249cd24a615
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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


  Commit: b20e423d05c2f8924f3bdd0d5ee0dcadb0b5944c
      https://github.com/Perl/perl5/commit/b20e423d05c2f8924f3bdd0d5ee0dcadb0b5944c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M lib/locale.t

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


  Commit: 5f7b8a63371f041e7e7f7b1abf05cf8243090e33
      https://github.com/Perl/perl5/commit/5f7b8a63371f041e7e7f7b1abf05cf8243090e33
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: ba63dc76ffe01534488e71b704600e1dd3a58ccb
      https://github.com/Perl/perl5/commit/ba63dc76ffe01534488e71b704600e1dd3a58ccb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M embed.fnc
    M proto.h

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


  Commit: 5fc1d9c393726048bceded6884627ea21a524ee9
      https://github.com/Perl/perl5/commit/5fc1d9c393726048bceded6884627ea21a524ee9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M handy.h

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

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


  Commit: 29d8837c3396431918a342b04072ff523cfd879f
      https://github.com/Perl/perl5/commit/29d8837c3396431918a342b04072ff523cfd879f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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


  Commit: 93b55142f17cb54c1a71220c9318aaa1570807e7
      https://github.com/Perl/perl5/commit/93b55142f17cb54c1a71220c9318aaa1570807e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M perl.h

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


  Commit: 651d0ef9d7b91fcddf09e46d36c5518ec67585c7
      https://github.com/Perl/perl5/commit/651d0ef9d7b91fcddf09e46d36c5518ec67585c7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

  Changed paths:
    M locale.c

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


  Commit: 8c163ece0c223fbdad9646750ba90bdde04b81a7
      https://github.com/Perl/perl5/commit/8c163ece0c223fbdad9646750ba90bdde04b81a7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-29 (Mon, 29 Mar 2021)

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

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

This reverts commit cd1fd76eac05b9ca866bb6f1dae6151767aa3d76.


Compare: https://github.com/Perl/perl5/compare/258ba7619050...8c163ece0c22



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