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2 months agodoc: fix typos in previous doc patch
Paul Eggert [Sat, 11 Apr 2026 20:29:07 +0000 (13:29 -0700)] 
doc: fix typos in previous doc patch

2 months agodoc: be more like POSIX in threading terms
Paul Eggert [Sat, 11 Apr 2026 20:19:43 +0000 (13:19 -0700)] 
doc: be more like POSIX in threading terms

In documentation and comments, be more like POSIX in terminology
involving multithreading.  Explain the distinction between
multithreaded process vs multithreaded program.  Change “program”
to “process” when the latter wording is more accurate or informative.
Simplify the wording for the constraints on processes that use
unlocked I/O.  Change “multithread-safe” to “thread-safe”.
Change “thread-safety” to “thread safety”.
However, do not change “multithreaded” to “multi-threaded” even
though there are some uses of both spellinga, as there are a whole
bunch of uses of “multithreaded”, also in identifier names;
perhaps Gnulib should even standardize on “multithreaded”
(not “multi-threaded”), contra POSIX.

2 months agosigprocmask: clarify GNULIB_SIGPROCMASK_SINGLE_THREAD doc
Paul Eggert [Sat, 11 Apr 2026 16:36:46 +0000 (09:36 -0700)] 
sigprocmask: clarify GNULIB_SIGPROCMASK_SINGLE_THREAD doc

2 months agofenv-exceptions-trapping tests: Make test more debugging friendly.
Bruno Haible [Fri, 10 Apr 2026 23:16:35 +0000 (01:16 +0200)] 
fenv-exceptions-trapping tests: Make test more debugging friendly.

Suggested by Pali Rohár <pali.rohar@gmail.com>.

* tests/test-fenv-except-trapping-1.c (main): Add an assertion.

2 months agosigprocmask: Allow single-thread optimization again.
Bruno Haible [Fri, 10 Apr 2026 21:11:40 +0000 (23:11 +0200)] 
sigprocmask: Allow single-thread optimization again.

* lib/sigprocmask.c (glwthread_spin_lock, glwthread_spin_unlock): Define
to empty if GNULIB_SIGPROCMASK_SINGLE_THREAD is defined.
(overrides_mt_lock, overrides_handler_lock): Don't define if
GNULIB_SIGPROCMASK_SINGLE_THREAD is defined.
* doc/multithread.texi (Multithreading Optimizations): Document
GNULIB_SIGPROCMASK_SINGLE_THREAD instead of
GNULIB_PTHREAD_SIGMASK_SINGLE_THREAD.

2 months agosigprocmask: Fix a signal-handler hang in case of a race condition.
Bruno Haible [Fri, 10 Apr 2026 20:57:04 +0000 (22:57 +0200)] 
sigprocmask: Fix a signal-handler hang in case of a race condition.

* lib/sigprocmask.c (overrides_handler_lock): Renamed from
overrides_lock.
(overrides_mt_lock): New variable.
(pthread_sigmask): Lock both locks.
(rpl_signal): Lock overrides_mt_lock, not overrides_lock.

2 months agosigprocmask: Support multithreaded applications on native Windows.
Bruno Haible [Fri, 10 Apr 2026 15:22:07 +0000 (17:22 +0200)] 
sigprocmask: Support multithreaded applications on native Windows.

* lib/signal.in.h (WIN_PTHREADS_SIGNAL_H): New macro.
* lib/sigprocmask.c: Include windows-spin.h.
(thread_local): New macro.
(blocked_set, pending_array): Mark as thread-local.
(blocked_handler): Remove function.
(struct override): New type.
(overrides, overrides_lock): New variables.
(override_handler): New function.
(pthread_sigmask): New function, borrowing from the previous sigprocmask
definition.
(sigprocmask): Now a wrapper around pthread_sigmask.
(rpl_signal): Use the overrides_lock to make it multithread-safe.
(_gl_raise_SIGPIPE): Add comments.
* modules/sigprocmask (Depends-on): Add windows-spin.
* lib/pthread_sigmask.c: Revert last change. On native Windows, don't
define pthread_sigmask here.
* modules/pthread_sigmask (Depends-on): Remove lock.
* NEWS: Remove the last entry.

2 months agostat: Update doc regarding mingw bug.
Bruno Haible [Mon, 6 Apr 2026 11:38:22 +0000 (13:38 +0200)] 
stat: Update doc regarding mingw bug.

* doc/posix-functions/stat.texi: Update regarding mingw bug.

2 months agombrtowc, mbrtoc32: Silence -Wshadow warnings (regr. 2026-04-02).
Bruno Haible [Mon, 6 Apr 2026 11:21:56 +0000 (13:21 +0200)] 
mbrtowc, mbrtoc32: Silence -Wshadow warnings (regr. 2026-04-02).

Reported by Collin Funk.

* lib/mbrtowc.c (rpl_mbrtowc): Enclose the #include in a block.
* lib/mbrtoc32.c (mbrtoc32): Likewise.

2 months agosigprocmask: add NEWS entry
Paul Eggert [Sun, 5 Apr 2026 22:20:39 +0000 (15:20 -0700)] 
sigprocmask: add NEWS entry

2 months agoterm-style-control: use pthread_sigmask
Paul Eggert [Sun, 5 Apr 2026 18:29:48 +0000 (11:29 -0700)] 
term-style-control: use pthread_sigmask

* lib/term-style-control.c (block_relevant_signals)
(unblock_relevant_signals): Prefer pthread_sigmask to sigprocmask.
* modules/term-style-control (Depends-on):
Depend on pthread_sigmask, not on sigprocmask.

2 months agofatal-signal: use pthread_sigmask
Paul Eggert [Sun, 5 Apr 2026 18:28:19 +0000 (11:28 -0700)] 
fatal-signal: use pthread_sigmask

* lib/fatal-signal.c (block_fatal_signals)
(unblock_fatal_signals): Prefer pthread_sigmask to sigprocmask.
* modules/fatal-signal (Depends-on):
Depend on pthread_sigmask, not on sigprocmask.

2 months agosigaction: use pthread_sigmask
Paul Eggert [Sun, 5 Apr 2026 18:26:56 +0000 (11:26 -0700)] 
sigaction: use pthread_sigmask

* lib/sigaction.c (sigaction_handler, sigaction):
Use pthread_sigmask, not sigprocmask.
* modules/sigaction (Depends-on):
Depend on pthread_sigmask, not on sigprocmask.

2 months agopthread_sigmask: lock here, not in sigprocmask
Paul Eggert [Sun, 5 Apr 2026 18:25:05 +0000 (11:25 -0700)] 
pthread_sigmask: lock here, not in sigprocmask

Since sigprocmask should now be used only in single-threaded processes,
move the locking from lib/sigprocmask.c to lib/pthread_sigmask.c.
* lib/pthread_sigmask.c: If !HAVE_SIGPROCMASK &&
!GNULIB_PTHREAD_SIGMASK_SINGLE_THREAD, replace Gnulib sigprocmask
with a thread-safe subsitute sigprocmask_r.
Include glthread/lock.h to implement this.
* lib/sigprocmask.c (gl_lock_define_initialized, gl_lock_lock)
(gl_lock_unlock, sig_lock): Remove.  All uses removed.
Do not include glthread/lock.h.
* m4/signalblocking.m4 (gl_SIGNALBLOCKING):
Define HAVE_SIGPROCMASK, for the benefit of pthread_sigmask.c.
* modules/pthread_sigmask (Depends-on): Add ‘lock’.
* modules/sigprocmask (Depends-on): Remove ‘lock’.

2 months agomcel: remove forced use of GLIBC's mbrtoc32
Pádraig Brady [Sun, 5 Apr 2026 11:30:21 +0000 (12:30 +0100)] 
mcel: remove forced use of GLIBC's mbrtoc32

This is a performance win on GLIBC,
as tested on the coreutils multi-byte update to cut(1):

   $ yes $(yes éééááé | head -n9 | paste -s -d,) |
     head -n1M > mb.in

   $ time LC_ALL=C.UTF-8 src/cut-before -c1 mb.in >/dev/null
   real    0m1.582s

   $ time LC_ALL=C.UTF-8 src/cut-after -c1 mb.in >/dev/null
   real    0m0.592s

* lib/mcel.h: While GLIBC's mbrtoc32 is functional for mcel,
it is seen to be 2.6x slower than gnulib's implementation
due to GLIBC's per call locale handling.

2 months agoposix_spawn-internal: Remove a FIXME.
Bruno Haible [Sat, 4 Apr 2026 21:17:59 +0000 (23:17 +0200)] 
posix_spawn-internal: Remove a FIXME.

* lib/spawni.c (__spawni): Add comment regarding sigprocmask.

2 months agolinked-list-unportable-tests: Prefer pthread_sigmask over sigprocmask.
Bruno Haible [Sat, 4 Apr 2026 20:55:34 +0000 (22:55 +0200)] 
linked-list-unportable-tests: Prefer pthread_sigmask over sigprocmask.

Suggested by Paul Eggert.

* tests/test-asyncsafe-linked_list-strong.c (block_sigint): Use
pthread_sigmask instead of sigprocmask.
* tests/test-asyncsafe-linked_list-weak.c (block_sigint): Likewise.

2 months agoasyncsafe-spin: Prefer pthread_sigmask over sigprocmask.
Bruno Haible [Sat, 4 Apr 2026 20:44:10 +0000 (22:44 +0200)] 
asyncsafe-spin: Prefer pthread_sigmask over sigprocmask.

Suggested by Paul Eggert.

* lib/asyncsafe-spin.c (asyncsafe_spin_lock, asyncsafe_spin_unlock): Use
pthread_sigmask instead of sigprocmask.
* modules/asyncsafe-spin (Depends-on): Add pthread_sigmask. Remove
sigprocmask.
(Link): New section.
* modules/asyncsafe-spin-tests (Makefile.am): Link test-asyncsafe-spin1
with $(PTHREAD_SIGMASK_LIB).
* modules/jit/cache-tests (Makefile.am): Link test-cache with
$(PTHREAD_SIGMASK_LIB).

2 months agospawn-pipe: Prefer pthread_sigmask over sigprocmask.
Bruno Haible [Sat, 4 Apr 2026 20:26:25 +0000 (22:26 +0200)] 
spawn-pipe: Prefer pthread_sigmask over sigprocmask.

Suggested by Paul Eggert.

* lib/spawn-pipe.c (execute): Use pthread_sigmask to get the set of
blocked signals.
* modules/spawn-pipe (Depends-on): Add pthread_sigmask.

2 months agoexecute: Prefer pthread_sigmask over sigprocmask.
Bruno Haible [Sat, 4 Apr 2026 20:15:24 +0000 (22:15 +0200)] 
execute: Prefer pthread_sigmask over sigprocmask.

Suggested by Paul Eggert.

* lib/execute.c (execute): Use pthread_sigmask to get the set of blocked
signals.
* modules/execute (Depends-on): Add pthread_sigmask.

2 months agosigpipe-die: Relax specification.
Bruno Haible [Sat, 4 Apr 2026 20:01:56 +0000 (22:01 +0200)] 
sigpipe-die: Relax specification.

* lib/sigpipe-die.h (install_sigpipe_die_handler): Clarify how to use
this function in a multithreaded program.

2 months agopthread_sigmask: Make it usable without -lpthread on most platforms.
Bruno Haible [Sat, 4 Apr 2026 13:16:44 +0000 (15:16 +0200)] 
pthread_sigmask: Make it usable without -lpthread on most platforms.

* m4/pthread_sigmask.m4 (gl_FUNC_PTHREAD_SIGMASK): Define
PTHREAD_SIGMASK_LIB to empty, except on AIX. Define
PTHREAD_SIGMASK_NOT_IN_LIBC if a workaround is needed.
* lib/pthread_sigmask.c (pthread_sigmask): If
PTHREAD_SIGMASK_NOT_IN_LIBC, just use sigprocmask.
* doc/posix-functions/pthread_sigmask.texi: Mention the dropped link
requirement. Mention that the NetBSD 9 bug is fixed.
* doc/posix-functions/sigprocmask.texi: Update note relating to
pthread_sigmask.

2 months agopthread_sigmask: Don't force an override on NetBSD.
Bruno Haible [Sat, 4 Apr 2026 13:16:31 +0000 (15:16 +0200)] 
pthread_sigmask: Don't force an override on NetBSD.

* m4/pthread_sigmask.m4 (gl_FUNC_PTHREAD_SIGMASK): Limit the macro test
to native Windows.

2 months agopthread_sigmask tests: Enable all tests on NetBSD.
Bruno Haible [Sat, 4 Apr 2026 13:16:17 +0000 (15:16 +0200)] 
pthread_sigmask tests: Enable all tests on NetBSD.

* modules/pthread_sigmask-tests (Depends-on): Remove test-xfail.
(Makefile.am): Don't test OS_IS_NETBSD.

2 months agosigprocmask: document race bugs on macOS
Paul Eggert [Sat, 4 Apr 2026 02:55:48 +0000 (19:55 -0700)] 
sigprocmask: document race bugs on macOS

In documentation and comments, mention macOS sigprocmask
incompatibility with GNU and most other systems, and note Gnulib
uses of sigprocmask that can cause subtle race condition bugs on
macOS.  Although an obvious fix is to switch to pthread_sigmask as
POSIX suggests, that will require some changing to linking
instructions, and the first step is documentation.

2 months agosigprocmask: single-thread optimization typo fix
Paul Eggert [Fri, 3 Apr 2026 18:22:54 +0000 (11:22 -0700)] 
sigprocmask: single-thread optimization typo fix

* lib/sigprocmask.c (gl_lock_define_initialized):
Swap #if’s then- and else-parts.

2 months agombrtoc32: Optimize single-locale case on glibc systems.
Bruno Haible [Thu, 2 Apr 2026 19:59:58 +0000 (21:59 +0200)] 
mbrtoc32: Optimize single-locale case on glibc systems.

Suggested by Pádraig Brady.

* lib/mbrtoc32.c (is_locale_utf8, cached_is_locale_utf8,
is_locale_utf8_cached): New functions/variable, copied from
lib/wcwidth.c.
(mbrtoc32): If GNULIB_WCHAR_SINGLE_LOCALE is defined, optimize the
frequent case of an UTF-8 locale on glibc systems.

2 months agombrtowc: Optimize single-locale case on glibc systems.
Bruno Haible [Thu, 2 Apr 2026 19:58:36 +0000 (21:58 +0200)] 
mbrtowc: Optimize single-locale case on glibc systems.

Suggested by Pádraig Brady.

* lib/mbrtowc.c (is_locale_utf8, cached_is_locale_utf8,
is_locale_utf8_cached): New functions/variable, copied from
lib/wcwidth.c.
(rpl_mbrtowc): If GNULIB_WCHAR_SINGLE_LOCALE is defined, optimize the
frequent case of an UTF-8 locale on glibc systems.

2 months agosigprocmask: Allow single-thread optimization in a more reliable way.
Bruno Haible [Wed, 1 Apr 2026 20:45:55 +0000 (22:45 +0200)] 
sigprocmask: Allow single-thread optimization in a more reliable way.

* modules/sigprocmask: Revert last change.
* lib/sigprocmask.c: Test GNULIB_SIGPROCMASK_SINGLE_THREAD before
including glthread/lock.h.
* doc/multithread.texi: Document GNULIB_SIGPROCMASK_SINGLE_THREAD.

2 months agolock: Document backward-incompatible change from yesterday.
Bruno Haible [Wed, 1 Apr 2026 20:33:56 +0000 (22:33 +0200)] 
lock: Document backward-incompatible change from yesterday.

* NEWS: Add note about 'lock' module.

2 months agogettext-h: Revert most of last change.
Bruno Haible [Wed, 1 Apr 2026 20:20:21 +0000 (22:20 +0200)] 
gettext-h: Revert most of last change.

* m4/gettext_h.m4 (gl_GETTEXT_H): Revert last change.
* lib/gettext.h: Revert last change.
(LC_MESSAGES): Define fallback like in locale.in.h.

2 months agombs_endswith, mbs_startswith: port to mcel-prefer
Paul Eggert [Wed, 1 Apr 2026 18:41:53 +0000 (11:41 -0700)] 
mbs_endswith, mbs_startswith: port to mcel-prefer

* lib/mbs_endswith.c (mbs_endswith):
* lib/mbs_startswith.c (mbs_startswith):
If GNULIB_MCEL_PREFER, prefer the mcel.h API and semantics.

2 months agoyesno: treat unlocking similarly if !ENABLE_NLS
Paul Eggert [Wed, 1 Apr 2026 18:34:42 +0000 (11:34 -0700)] 
yesno: treat unlocking similarly if !ENABLE_NLS

If the application is using unlocked-io, do that in the
!ENABLE_NLS case too.  This is more for consistency than for
performance in the typical case.
* lib/yesno.c [USE_UNLOCKED_IO]: Include unlocked-io.h.

2 months agoautoupdate
Karl Berry [Wed, 1 Apr 2026 14:12:55 +0000 (07:12 -0700)] 
autoupdate

2 months agosigprocmask: allow --avoid=lock
Paul Eggert [Wed, 1 Apr 2026 02:54:46 +0000 (19:54 -0700)] 
sigprocmask: allow --avoid=lock

* modules/sigprocmask (Files): Add lib/glthread/lock.h,
so that this module works even if the lock module is avoided.
This is useful for gzip, which does not use multithreading.

2 months agothread: lessen glthread namespace pollution
Paul Eggert [Wed, 1 Apr 2026 02:51:36 +0000 (19:51 -0700)] 
thread: lessen glthread namespace pollution

In lib/glthread/*.h, avoid including files if it’s easy, and if
the files are not needed in the .h file to implement the module.
* lib/glthread/cond.h: Include glthread/lock.h only if needed.
* lib/glthread/lock.c, lib/glthread/once.c: Include <errno.h> here ...
* lib/glthread/lock.h, lib/glthread/once.h: ... instead of here.
* lib/glthread/lock.h: Include glthread/once.h only if needed.
* lib/glthread/yield.h: Don’t include <errno.h>.

2 months agogettext-h: don’t depend on locale-h
Paul Eggert [Tue, 31 Mar 2026 23:38:47 +0000 (16:38 -0700)] 
gettext-h: don’t depend on locale-h

This is useful for apps like gzip.h that stay in the C locale
and don’t need all the the locale-h machinery.
* lib/gettext.h: Include <locale.h> only if !ENABLE_NLS && __sun.
(pgettext, dpgettext, npgettext, dnpgettext, pgettext_expr)
(npgettext_expr): Use _GL_LC_MESSAGES, not LC_MESSAGES.
* m4/gettext_h.m4 (gl_GETTEXT_H): Define _GL_LC_MESSAGES.
* modules/gettext-h (Depends-on): Remove locale-h.

2 months agofenv-exceptions-trapping: Work around mingw 14.0.0 bug.
Bruno Haible [Tue, 31 Mar 2026 06:44:44 +0000 (08:44 +0200)] 
fenv-exceptions-trapping: Work around mingw 14.0.0 bug.

* doc/glibc-functions/feenableexcept.texi: Mention the mingw 14.0.0 bug.

2 months agofenv-exceptions-trapping: Work around mingw 14.0.0 bug.
Bruno Haible [Mon, 30 Mar 2026 20:12:50 +0000 (22:12 +0200)] 
fenv-exceptions-trapping: Work around mingw 14.0.0 bug.

* m4/fenv-exceptions-trapping.m4 (gl_FENV_EXCEPTIONS_TRAPPING): Override
feenableexcept, fedisableexcept also on mingw.

2 months agorenameatu tests: Enhance test of the RENAME_* macros.
Bruno Haible [Mon, 30 Mar 2026 10:19:35 +0000 (12:19 +0200)] 
renameatu tests: Enhance test of the RENAME_* macros.

* tests/test-renameatu.c (main): Test that the RENAME_* macro values are
disjoint.

2 months agorenameatu tests: Test that the RENAME_* macros are defined.
Collin Funk [Mon, 30 Mar 2026 03:29:48 +0000 (20:29 -0700)] 
renameatu tests: Test that the RENAME_* macros are defined.

* tests/test-renameatu.c (main): Test that the RENAME_* macros are
defined and unique.

2 months agorenameatu: Ensure all RENAME_* macros are defined.
Collin Funk [Mon, 30 Mar 2026 03:27:33 +0000 (20:27 -0700)] 
renameatu: Ensure all RENAME_* macros are defined.

* lib/renameatu.h (RENAME_EXCHANGE) [!RENAME_EXCHANGE]: Define macro.
(RENAME_WHITEOUT) [!RENAME_WHITEOUT]: Likewise.

2 months agognu-web-doc-update: Add an environment variable for the CVS username
Collin Funk [Fri, 27 Mar 2026 02:59:19 +0000 (19:59 -0700)] 
gnu-web-doc-update: Add an environment variable for the CVS username

* build-aux/gnu-web-doc-update (help): Mention the SAVANNAH_CVS_USER
environment variable.
($cvs_user): Use the SAVANNAH_CVS_USER environment variable and fallback
to USER if it is unset or empty.

2 months agodoc: Mention a Solaris 11.4 bug.
Collin Funk [Wed, 25 Mar 2026 03:11:36 +0000 (20:11 -0700)] 
doc: Mention a Solaris 11.4 bug.

* doc/posix-functions/open.texi: Mention that Solaris 11.4 sets errno to
EINVAL instead of EISDIR when open is called on a directory with
O_CREAT.
* doc/posix-functions/openat.texi: Likewise.

2 months agoFix typos in recent ChangeLog entry.
Bruno Haible [Sat, 21 Mar 2026 10:40:36 +0000 (11:40 +0100)] 
Fix typos in recent ChangeLog entry.

2 months agovasprintf-posix, vasprintf, stdio-windows: Prefer AC_CHECK_FUNCS_ONCE.
Collin Funk [Sat, 21 Mar 2026 01:43:34 +0000 (18:43 -0700)] 
vasprintf-posix, vasprintf, stdio-windows: Prefer AC_CHECK_FUNCS_ONCE.

* m4/vasprintf-posix.m4 (gl_FUNC_VASPRINTF_IS_POSIX): Use
AC_CHECK_FUNCS_ONCE instead of AC_CHECK_FUNCS.
* m4/vasprintf.m4 (gl_FUNC_VASPRINTF): Likewise.
* modules/stdio-windows: Likewise.

2 months agonstrftime: revert size typo non-fix
Paul Eggert [Fri, 20 Mar 2026 23:24:48 +0000 (16:24 -0700)] 
nstrftime: revert size typo non-fix

(Thanks to Bruno Haible.)

2 months agobyteswap: depend on stdbit-h, not stdint-h
Paul Eggert [Fri, 20 Mar 2026 22:31:37 +0000 (15:31 -0700)] 
byteswap: depend on stdbit-h, not stdint-h

* lib/byteswap.in.h: Do not include stdint.h, as stdbit.h suffices.
* modules/byteswap (Depends-on): Depend on stdbit-h, not stdint-h.

2 months agocountof-h: use countof, part 3
Paul Eggert [Fri, 20 Mar 2026 21:41:55 +0000 (14:41 -0700)] 
countof-h: use countof, part 3

* lib/nproc.c, lib/regex_internal.h, lib/set-permissions.c:
* lib/strftime.c:
Include <stdcountof.h>.
* lib/nproc.c (ARRAY_SIZE):
* lib/sig2str.c (NUNNAME_ENTRIES):
Remove.  All uses replaced with countof.
* lib/regcomp.c (regerror):
* lib/set-permissions.c (set_acls_from_mode):
* lib/strftime.c (__strftime_internal):
Use countof instead of doing it by hand.
* modules/acl-permissions, modules/c-nstrftime, modules/fprintftime:
* modules/nproc, modules/regex, modules/nstrftime:
* modules/nstrftime-limited, modules/sig2str:
Depend on stdcountof-h.

2 months agoboot-time: remove SIZEOF
Paul Eggert [Fri, 20 Mar 2026 21:30:53 +0000 (14:30 -0700)] 
boot-time: remove SIZEOF

* lib/boot-time-aux.h (SIZEOF): Remove; no longer used,
now that the code uses countof.

2 months agonstrftime: fix size typo when compiling for glibc
Paul Eggert [Fri, 20 Mar 2026 20:56:29 +0000 (13:56 -0700)] 
nstrftime: fix size typo when compiling for glibc

* lib/strftime.c (c_weekday_names, c_month_names) [COMPILE_WIDE]:
Fix size typo.

3 months agostdbit-h: don’t generate some dummy .o files
Paul Eggert [Mon, 16 Mar 2026 22:17:26 +0000 (15:17 -0700)] 
stdbit-h: don’t generate some dummy .o files

On recent GNU and other C23ish platforms, do not compile files
like lib/stdc_bit_ceil.c, as the corresponding .o files contain
nothing useful.
* m4/stdbit_h.m4 (gl_STDBIT_H):
Define the Automake condition GL_HAVE_STDBIT_H.
Quote cache variables in case the cache is bad.
* modules/stdc_bit_ceil, modules/stdc_bit_floor:
* modules/stdc_bit_width, modules/stdc_count_ones:
* modules/stdc_count_zeros, modules/stdc_first_leading_one:
* modules/stdc_first_leading_zero:
* modules/stdc_first_trailing_one:
* modules/stdc_first_trailing_zero, modules/stdc_has_single_bit:
* modules/stdc_leading_ones, modules/stdc_leading_zeros:
* modules/stdc_trailing_ones, modules/stdc_trailing_zeros:
Generate if !GL_HAVE_STDBIT_H, not if GL_GENERATE_STDBIT_H.

3 months agocygpath: Add reminder to include <config.h>.
Collin Funk [Mon, 16 Mar 2026 19:25:28 +0000 (12:25 -0700)] 
cygpath: Add reminder to include <config.h>.

* lib/cygpath.h: Check that config.h was already included so
_GL_ATTRIBUTE_MALLOC and _GL_ATTRIBUTE_DEALLOC_FREE are defined.

3 months agostdc_memrevers8u: Add comment.
Bruno Haible [Mon, 16 Mar 2026 19:42:58 +0000 (20:42 +0100)] 
stdc_memrevers8u: Add comment.

* lib/stdbit.in.h (stdc_memreverse8u*): Add comment regarding
uint_leastN_t.

3 months agostdbit-h: Make code more readable and typo-proof.
Bruno Haible [Mon, 16 Mar 2026 19:30:13 +0000 (20:30 +0100)] 
stdbit-h: Make code more readable and typo-proof.

* lib/stdbit.in.h (stdc_load8_beu16, stdc_load8_beu32, stdc_load8_beu64,
stdc_load8_leu16, stdc_load8_leu32, stdc_load8_leu64): Avoid declaring
multiple variables in one declaration.

3 months agostdbit-h: don’t memcpy on oddball hosts
Paul Eggert [Mon, 16 Mar 2026 19:18:23 +0000 (12:18 -0700)] 
stdbit-h: don’t memcpy on oddball hosts

Mostly-theoretical problem reported by Lasse Collin in:
https://lists.gnu.org/r/bug-gnulib/2026-03/msg00135.html
* lib/stdbit.in.h (_GL_STDBIT_OPTIMIZE_VIA_MEMCPY):
Do not define to 1 on oddball hosts.

3 months agostdbit-h: be clearer about castless conversion
Paul Eggert [Mon, 16 Mar 2026 16:10:00 +0000 (09:10 -0700)] 
stdbit-h: be clearer about castless conversion

* lib/stdbit.in.h (stdc_load8_beu16, stdc_load8_beu32)
(stdc_load8_beu64, stdc_load8_leu16, stdc_load8_leu32)
(stdc_load8_leu64): Assign to temporaries rather than ORing to zero.

3 months agostdc_rotate_left, stdc_rotate_right: Update documentation.
Bruno Haible [Mon, 16 Mar 2026 12:31:59 +0000 (13:31 +0100)] 
stdc_rotate_left, stdc_rotate_right: Update documentation.

* doc/posix-functions/stdc_rotate_left.texi: Document the effects of the
new module.
* doc/posix-functions/stdc_rotate_right.texi: Likewise.

3 months agostdbit-h: Reorder definitions.
Bruno Haible [Mon, 16 Mar 2026 09:12:46 +0000 (10:12 +0100)] 
stdbit-h: Reorder definitions.

* lib/stdbit.in.h: Move private helper macros and functions to the
section conditionalized by @GNULIB_STDC_LEADING_ZEROS@,
@GNULIB_STDC_TRAILING_ZEROS@, @GNULIB_STDC_COUNT_ONES@, respectively.

3 months agostdbit-h: Fix syntax error in C++ mode (regression 2026-03-12).
Bruno Haible [Mon, 16 Mar 2026 08:45:45 +0000 (09:45 +0100)] 
stdbit-h: Fix syntax error in C++ mode (regression 2026-03-12).

* lib/stdbit.in.h: Move the 'extern "C" {' outside of the
'#if !@HAVE_STDBIT_H@'.

3 months agostdbit-h: remove stdbit.c
Paul Eggert [Mon, 16 Mar 2026 06:54:59 +0000 (23:54 -0700)] 
stdbit-h: remove stdbit.c

lib/stdbit.c was present only to define private helper functions.
Move them into lib/stdc_leading_zeros.c and
lib/stdc_trailing_zeros.c, depending on what they help.
The latter now might use the former, since the
_gl_stdbit_ctz family calls the _gl_stdbit_clz family
when !defined _GL_STDBIT_HAS_BUILTIN_CTZ && !defined _MSC_VER,
so stdc_trailing_zeros now depends on stdc_leading_zeros.
* lib/stdbit.c: Remove file.
* lib/stdbit.in.h (_GL_STDBIT_INLINE): Remove.
All uses replaced by _GL_STDC_LEADING_ZEROS_INLINE
or _GL_STDC_TRAILING_ZEROS_INLINE.
* modules/stdbit-h (Files, lib_SOURCES): Remove lib/stdbit.c.
* modules/stdc_trailing_zeros (Depends-on): Add stdc_leading_zeros.

3 months agostdbit-h: test without <stdint.h>
Paul Eggert [Mon, 16 Mar 2026 06:54:58 +0000 (23:54 -0700)] 
stdbit-h: test without <stdint.h>

Improve the <stdbit.h> tests so that they check
that <stdbit.h> works even if <stdint.h> is not included.
* modules/stdc_bit_ceil-tests, modules/stdc_bit_floor-tests:
* modules/stdc_bit_width-tests, modules/stdc_count_ones-tests:
* modules/stdc_count_zeros-tests:
* modules/stdc_first_leading_one-tests:
* modules/stdc_first_leading_zero-tests:
* modules/stdc_first_trailing_one-tests:
* modules/stdc_first_trailing_zero-tests:
* modules/stdc_has_single_bit-tests:
* modules/stdc_leading_ones-tests:
* modules/stdc_leading_zeros-tests:
* modules/stdc_trailing_ones-tests:
* modules/stdc_trailing_zeros-tests:
(Depends-on): Remove stdint-h.
* tests/from-glibc/tst-stdbit.h [GNULIB_TEST_STDBIT]:
Do not include <stdint.h>.

3 months agostdbit-h: don’t depend on stdint-h
Paul Eggert [Mon, 16 Mar 2026 06:54:58 +0000 (23:54 -0700)] 
stdbit-h: don’t depend on stdint-h

* modules/stdc_load8, modules/stdc_load8_aligned:
* modules/stdc_store8, modules/stdc_store8_aligned:
* modules/stdc_memreverse8u:
(Depends-on): Remove stdint-h, as Gnulib should be able to assume
the small subset of C99 <stdint.h> that stdbit.in.h uses.

3 months agostdbit-h: namespace cleanup on recent GNU
Paul Eggert [Mon, 16 Mar 2026 06:54:58 +0000 (23:54 -0700)] 
stdbit-h: namespace cleanup on recent GNU

* lib/stdbit.in.h: Include <stddef.h> if !@HAVE_STDBIT_H@, good on
all known Gnulib targets, not if @GNULIB_STDC_MEMREVERSE8@, which
is not quite right because C23 requires that stdbit.h define
size_t even if stdc_memreverse8 is not used.
Do not include <stdint.h> if @HAVE_STDBIT_H@ && defined
__UINT_FAST64_TYPE__, as it is no longer needed.
(_GL_STDBIT_UINT_FAST16, _GL_STDBIT_UINT_FAST32)
(_GL_STDBIT_UINT_FAST64): New macros.  Use them instead of
uint_fast16_t etc., to avoid namespace pollution.
(stdc_load8_beu16, stdc_load8_beu32, stdc_load8_beu64)
(stdc_load8_leu16, stdc_load8_leu32, stdc_load8_leu64):
Use them instead of casting to the relevant types,
to avoid the need for casts.

3 months agotest-stdc_rotate_right tests: Fix whitespace.
Collin Funk [Mon, 16 Mar 2026 05:29:25 +0000 (22:29 -0700)] 
test-stdc_rotate_right tests: Fix whitespace.

* tests/test-stdc_rotate_right.c (TEST_CASE): Remove extra space
character.

3 months agodoc: add missing module indexes.
Collin Funk [Mon, 16 Mar 2026 05:27:18 +0000 (22:27 -0700)] 
doc: add missing module indexes.

Reported by Bruno Haible in
<https://lists.gnu.org/r/bug-gnulib/2026-03/msg00124.html>.

* doc/posix-functions/stdc_rotate_left.texi: Add missing module index.
* doc/posix-functions/stdc_rotate_right.texi: Likewise.

3 months agostdc_rotate_right: Add tests.
Collin Funk [Mon, 16 Mar 2026 00:01:40 +0000 (17:01 -0700)] 
stdc_rotate_right: Add tests.

* modules/stdc_rotate_right-tests: New file.
* tests/test-stdc_rotate_right.c: Likewise.

3 months agostdc_rotate_right: New module.
Collin Funk [Mon, 16 Mar 2026 00:00:38 +0000 (17:00 -0700)] 
stdc_rotate_right: New module.

* lib/stdbit.in.h (_GL_STDC_ROTATE_RIGHT_INLINE, _gl_stdc_rotate_right)
(stdc_rotate_right): New macros.
(stdc_rotate_right_uc, stdc_rotate_right_us, stdc_rotate_right_ui)
(stdc_rotate_right_ul, stdc_rotate_right_ull): New functions.
* lib/stdc_rotate_right.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_ROTATE_RIGHT.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_ROTATE_RIGHT.
* modules/stdc_rotate_right: New file.
* doc/posix-functions/stdc_rotate_right.texi: Mention the new module.

3 months agostdc_rotate_left: Add tests.
Collin Funk [Sun, 15 Mar 2026 23:53:26 +0000 (16:53 -0700)] 
stdc_rotate_left: Add tests.

* modules/stdc_rotate_left-tests: New file.
* tests/test-stdc_rotate_left.c: Likewise.

3 months agostdc_rotate_left: New module.
Collin Funk [Sun, 15 Mar 2026 23:48:45 +0000 (16:48 -0700)] 
stdc_rotate_left: New module.

* lib/stdbit.in.h (_GL_STDC_ROTATE_LEFT_INLINE, _gl_stdc_rotate_left)
(stdc_rotate_left): New macros.
(stdc_rotate_left_uc, stdc_rotate_left_us, stdc_rotate_left_ui)
(stdc_rotate_left_ul, stdc_rotate_left_ull): New functions.
* lib/stdc_rotate_left.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_ROTATE_LEFT.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_ROTATE_LEFT.
* modules/stdc_rotate_left: New file.
* doc/posix-functions/stdc_rotate_left.texi: Mention the new module.

3 months agoposix_spawn-internal: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 20:58:34 +0000 (21:58 +0100)] 
posix_spawn-internal: Move private Gnulib functions to _gl_* namespace.

* lib/spawn_int.h (_gl_posix_spawn_file_actions_realloc): Renamed from
gl_posix_spawn_file_actions_realloc.
(_gl_posix_spawn_internal): Renamed from gl_posix_spawn_internal.

3 months agolocale-h: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 20:55:10 +0000 (21:55 +0100)] 
locale-h: Move private Gnulib functions to _gl_* namespace.

* lib/locale.in.h (_gl_log2_lc_mask): Renamed from gl_log2_lc_mask.
(_gl_log2_lcmask_to_index): Renamed from gl_log2_lcmask_to_index.
(_gl_index_to_log2_lcmask): Renamed from gl_index_to_log2_lcmask.
* lib/duplocale.c: Update.
* lib/freelocale.c: Update.
* lib/newlocale.c: Update.
* lib/getlocalename_l-unsafe.c: Update.
* lib/is_l-impl.h: Update.
* lib/to_l-impl.h: Update.
* lib/strcasecmp_l.c: Update.
* lib/strncasecmp_l.c: Update.
* lib/strerror_l.c: Update.

3 months agostrnul: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 20:43:30 +0000 (21:43 +0100)] 
strnul: Move private Gnulib functions to _gl_* namespace.

* lib/string.in.h (_gl_strnul): Renamed from gl_strnul.
* lib/strnul.c: Update.

3 months agostdlib-h: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 20:41:06 +0000 (21:41 +0100)] 
stdlib-h: Move private Gnulib functions to _gl_* namespace.

* lib/stdlib.in.h (_gl_MB_CUR_MAX): Renamed from gl_MB_CUR_MAX.

3 months agostdio-h, stdio-windows: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 20:38:32 +0000 (21:38 +0100)] 
stdio-h, stdio-windows: Move private Gnulib functions to _gl_* namespace.

* lib/stdio.in.h (_gl_consolesafe_fwrite): Renamed from
gl_consolesafe_fwrite.
(_gl_consolesafe_fprintf): Renamed from gl_consolesafe_fprintf.
(_gl_consolesafe_printf): Renamed from gl_consolesafe_printf.
(_gl_consolesafe_vfprintf): Renamed from gl_consolesafe_vfprintf.
(_gl_consolesafe_vprintf): Renamed from gl_consolesafe_vprintf.
* lib/stdio-consolesafe.c: Update.
* lib/stdio-write.c: Update.

3 months agomath-h: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 20:33:08 +0000 (21:33 +0100)] 
math-h: Move private Gnulib functions to _gl_* namespace.

* lib/math.in.h (_gl_isfinitef): Renamed from gl_isfinitef.
(_gl_isfinited): Renamed from gl_isfinited.
(_gl_isfinitel): Renamed from gl_isfinitel.
(_gl_isinff): Renamed from gl_isinff.
(_gl_isinfd): Renamed from gl_isinfd.
(_gl_isinfl): Renamed from gl_isinfl.
(_gl_isnanf): Renamed from gl_isnan_f.
(_gl_isnand): Renamed from gl_isnan_d.
(_gl_isnanl): Renamed from gl_isnan_l.
(_gl_signbitf): Renamed from gl_signbitf.
(_gl_signbitf_OPTIMIZED_MACRO): Renamed from
gl_signbitf_OPTIMIZED_MACRO.
(_gl_signbitd): Renamed from gl_signbitd.
(_gl_signbitd_OPTIMIZED_MACRO): Renamed from
gl_signbitd_OPTIMIZED_MACRO.
(_gl_signbitl): Renamed from gl_signbitl.
(_gl_signbitl_OPTIMIZED_MACRO): Renamed from
gl_signbitl_OPTIMIZED_MACRO.
* lib/isfinite.c: Update.
* lib/isinf.c: Update.
* lib/signbitf.c: Update.
* lib/signbitd.c: Update.
* lib/signbitl.c: Update.

3 months agofloat-h: Move private Gnulib data to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 18:42:36 +0000 (19:42 +0100)] 
float-h: Move private Gnulib data to _gl_* namespace.

* lib/float.in.h (_gl_LDBL_MAX): Renamed from gl_LDBL_MAX.
(_gl_LDBL_TRUE_MIN): Renamed from gl_LDBL_TRUE_MIN.
(_gl_FLT_SNAN): Renamed from gl_FLT_SNAN.
(_gl_DBL_SNAN): Renamed from gl_DBL_SNAN.
(_gl_LDBL_SNAN): Renamed from gl_LDBL_SNAN.
* lib/float.c: Update.

3 months agoexpl, exp2l: Move private Gnulib data to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 18:36:31 +0000 (19:36 +0100)] 
expl, exp2l: Move private Gnulib data to _gl_* namespace.

* lib/expl-table.c (_gl_expl_table): Renamed from gl_expl_table.
* lib/expl.c: Update.
* lib/exp2l.c: Update.

3 months agomsvc-inval: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 18:32:44 +0000 (19:32 +0100)] 
msvc-inval: Move private Gnulib functions to _gl_* namespace.

* lib/msvc-inval.h (_gl_msvc_inval_current): Renamed from
gl_msvc_inval_current.
* lib/msvc-inval.c: Update.

3 months agoglibc-internal/scratch_buffer: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 17:50:24 +0000 (18:50 +0100)] 
glibc-internal/scratch_buffer: Move private Gnulib functions to _gl_* namespace.

* lib/scratch_buffer.h (__libc_scratch_buffer_*): Define to symbols in
the _gl_* namespace.

3 months agoglibc-internal/dynarray: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 17:45:07 +0000 (18:45 +0100)] 
glibc-internal/dynarray: Move private Gnulib functions to _gl_* namespace.

* lib/dynarray.h (__libc_dynarray_*): Define to symbols in the _gl_*
namespace.

3 months agoat-init: Move private Gnulib functions to _gl_* namespace.
Bruno Haible [Sun, 15 Mar 2026 17:38:48 +0000 (18:38 +0100)] 
at-init: Move private Gnulib functions to _gl_* namespace.

* lib/at-init.h (_gl_at_init_dummy): Renamed from gl_at_init_dummy.
* lib/at-init.c: Update.

3 months agostdc_memreverse8: Add tests.
Bruno Haible [Sun, 15 Mar 2026 13:48:43 +0000 (14:48 +0100)] 
stdc_memreverse8: Add tests.

* tests/test-stdc_memreverse8.c: New file.
* modules/stdc_memreverse8-tests: New file.

3 months agostdc_memreverse8: New module.
Bruno Haible [Sun, 15 Mar 2026 13:35:48 +0000 (14:35 +0100)] 
stdc_memreverse8: New module.

* lib/stdbit.in.h: Include <stddef.h>.
(_GL_STDC_MEMREVERSE8_INLINE): New macro.
(stdc_memreverse8): New function.
* lib/stdc_memreverse8.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_MEMREVERSE8.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_MEMREVERSE8.
* modules/stdc_memreverse8: New file.
* doc/posix-functions/stdc_memreverse8.texi: Mention the new module.

3 months agobyteswap: Rely on <stdbit.h>.
Bruno Haible [Sun, 15 Mar 2026 12:30:37 +0000 (13:30 +0100)] 
byteswap: Rely on <stdbit.h>.

* lib/byteswap.in.h: Include <stdbit.h>.
(_GL_BYTESWAP_HAS_BUILTIN_BSWAP16, _GL_BYTESWAP_HAS_BUILTIN_BSWAP32,
_GL_BYTESWAP_HAS_BUILTIN_BSWAP64): Remove macros.
(bswap_16): Just call stdc_memreverse8u16.
(bswap_32): Just call stdc_memreverse8u32.
(bswap_64): Just call stdc_memreverse8u64.
* modules/byteswap (Depends-on): Add stdc_memreverse8u. Remove bool.

3 months agostdc_load8_aligned, stdc_store8_aligned: Don't use <byteswap.h>.
Bruno Haible [Sun, 15 Mar 2026 12:24:24 +0000 (13:24 +0100)] 
stdc_load8_aligned, stdc_store8_aligned: Don't use <byteswap.h>.

* lib/stdbit.in.h: Don't include <byteswap.h>.
(_GL_STDBIT_BSWAP16, _GL_STDBIT_BSWAP32, _GL_STDBIT_BSWAP64): Remove
macros.
(stdc_memreverse8u8, stdc_memreverse8u16, stdc_memreverse8u32,
stdc_memreverse8u64): Generalize: Take uint_least* parameter.
(stdc_load8_aligned_*, stdc_store8_aligned_*): Use stdc_memreverse8u16,
stdc_memreverse8u32, stdc_memreverse8u64 instead of _GL_STDBIT_BSWAP16,
_GL_STDBIT_BSWAP32, _GL_STDBIT_BSWAP64.

3 months agostdc_memreverse8u: Add tests.
Bruno Haible [Sun, 15 Mar 2026 12:05:20 +0000 (13:05 +0100)] 
stdc_memreverse8u: Add tests.

* tests/test-stdc_memreverse8u.c: New file, based on
tests/test-byteswap.c.
* modules/stdc_memreverse8u-tests: New file.

3 months agostdc_memreverse8u: New module.
Bruno Haible [Sun, 15 Mar 2026 12:01:49 +0000 (13:01 +0100)] 
stdc_memreverse8u: New module.

* lib/stdbit.in.h (_GL_STDC_MEMREVERSE8U_INLINE): New macro.
(stdc_memreverse8u8, stdc_memreverse8u16, stdc_memreverse8u32,
stdc_memreverse8u64): New functions, based on lib/byteswap.in.h.
* lib/stdc_memreverse8u.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_MEMREVERSE8U.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_MEMREVERSE8U.
* modules/stdc_memreverse8u: New file.
* doc/posix-functions/stdc_memreverse8u8.texi: Mention the new module.
* doc/posix-functions/stdc_memreverse8u16.texi: Likewise.
* doc/posix-functions/stdc_memreverse8u32.texi: Likewise.
* doc/posix-functions/stdc_memreverse8u64.texi: Likewise.

3 months agohamt: Don't use deprecated module.
Bruno Haible [Sun, 15 Mar 2026 09:13:52 +0000 (10:13 +0100)] 
hamt: Don't use deprecated module.

* lib/hamt.c: Include <stdbit.h> instead of count-one-bits.h.
(trienode_count, subtrie_lookup, subtrie_insert, subtrie_remove): Call
stdc_count_ones instead of count_one_bits.
* modules/hamt (Depends-on): Add stdc_count_ones. Remove count-one-bits.

3 months agocount-*: Fix module status (regression yesterday).
Bruno Haible [Sun, 15 Mar 2026 09:01:57 +0000 (10:01 +0100)] 
count-*: Fix module status (regression yesterday).

* modules/count-leading-zeros: Mark as deprecated, not obsolete.
Recommend module 'stdc_leading_zeros' instead of 'stdbit'.
* modules/count-trailing-zeros: Mark as deprecated, not obsolete.
Recommend module 'stdc_trailing_zeros' instead of 'stdbit'.
* modules/count-one-bits: Mark as deprecated, not obsolete. Recommend
module 'stdc_count_ones' instead of 'stdbit'.
* NEWS: Update.

3 months agostdbit: obsolete older count-* modules
Paul Eggert [Sun, 15 Mar 2026 01:54:36 +0000 (18:54 -0700)] 
stdbit: obsolete older count-* modules

* modules/count-leading-zeros:
* modules/count-one-bits:
* modules/count-trailing-zeros: Now obsolete,
as the stdbit module is now mature enough.

3 months agostdbit-h: avoid <byteswap.h> namespace pollution
Paul Eggert [Sat, 14 Mar 2026 22:15:50 +0000 (15:15 -0700)] 
stdbit-h: avoid <byteswap.h> namespace pollution

* lib/stdbit.in.h (_GL_STDBIT_HAS_BUILTIN_BSWAP16)
(_GL_STDBIT_HAS_BUILTIN_BSWAP32, _GL_STDBIT_HAS_BUILTIN_BSWAP64)
(_GL_STDBIT_BSWAP16, _GL_STDBIT_BSWAP32, _GL_STDBIT_BSWAP64):
New macros.  All uses of bswap_16, bswap_32, bswap_64 changed.

3 months agostdbit-h: avoid <string.h> namespace pollution
Paul Eggert [Sat, 14 Mar 2026 21:27:18 +0000 (14:27 -0700)] 
stdbit-h: avoid <string.h> namespace pollution

* lib/stdbit.in.h (_GL_STDBIT_MEMCPY): New macro.
All uses of memcpy changed.

3 months agostdbit-h: __has_builtin (__builtin_assume_aligned)
Paul Eggert [Sat, 14 Mar 2026 20:07:54 +0000 (13:07 -0700)] 
stdbit-h: __has_builtin (__builtin_assume_aligned)

Prefer the usual pattern for checking for builtins:
allow __has_builtin for compilers that are not Clang or GCC
where we already have something.
* lib/stdbit.in.h (_GL_HAS_BUILTIN_ASSUME_ALIGNED): New macro.
(_GL_STDBIT_ASSUME_ALIGNED): Use it.

3 months agodoc: assume copy to int preserves low order bits
Paul Eggert [Sat, 14 Mar 2026 19:23:13 +0000 (12:23 -0700)] 
doc: assume copy to int preserves low order bits

3 months agodoc: fix typos re Unisys ClearPath Libra
Paul Eggert [Sat, 14 Mar 2026 19:21:55 +0000 (12:21 -0700)] 
doc: fix typos re Unisys ClearPath Libra

3 months agostdbit-h: adjust comments to match code
Paul Eggert [Sat, 14 Mar 2026 18:30:35 +0000 (11:30 -0700)] 
stdbit-h: adjust comments to match code

* lib/stdbit.in.h: Adjust commentary to match code’s types
and use of if rather than #if.

3 months agostdbit-h: restore optimization for RISC-V etc
Paul Eggert [Sat, 14 Mar 2026 00:44:06 +0000 (17:44 -0700)] 
stdbit-h: restore optimization for RISC-V etc

Problem reported by Bruno Haible in:
https://lists.gnu.org/r/bug-gnulib/2026-03/msg00098.html
This patch does the optimization in a different way,
preferring plain ‘if’ to ‘#if’ if either will do.
* lib/stdbit.in.h: Bring back includes for byteswap.h, string.h.
(_GL_STDBIT_OPTIMIZE_VIA_MEMCPY, _GL_STDBIT_ASSUME_ALIGNED)
(_GL_STDBIT_BIGENDIAN): New macros.
(stdc_load8_beu16, stdc_load8_leu16):
Bring back casts to uint_fast16_t.
(stdc_load8_aligned_beu16, stdc_load8_aligned_beu32)
(stdc_load8_aligned_beu64, stdc_load8_aligned_leu16)
(stdc_load8_aligned_leu32, stdc_load8_aligned_leu64)
(stdc_load8_aligned_bes8, stdc_load8_aligned_bes16)
(stdc_load8_aligned_bes32, stdc_load8_aligned_bes64)
(stdc_load8_aligned_les8, stdc_load8_aligned_les16)
(stdc_load8_aligned_les32, stdc_load8_aligned_les64)
(stdc_store8_aligned_beu16, stdc_store8_aligned_beu32)
(stdc_store8_aligned_beu64, stdc_store8_aligned_leu16)
(stdc_store8_aligned_leu32, stdc_store8_aligned_leu64)
(stdc_store8_aligned_bes8, stdc_store8_aligned_bes16)
(stdc_store8_aligned_bes32, stdc_store8_aligned_bes64)
(stdc_store8_aligned_les8, stdc_store8_aligned_les16)
(stdc_store8_aligned_les32, stdc_store8_aligned_les64):
Bring back the memcpy optimization if _GL_STDBIT_OPTIMIZE_VIA_MEMCPY.
* modules/stdc_load8_aligned (Depends-on):
* modules/stdc_store8_aligned (Depends-on):
Go back to depending on byteswap.

3 months agostdbit-h: fewer casts
Paul Eggert [Fri, 13 Mar 2026 19:29:50 +0000 (12:29 -0700)] 
stdbit-h: fewer casts

* lib/stdbit.in.h (stdc_load8_beu16, stdc_load8_leu16)
(stdc_store8_beu16, stdc_store8_beu32, stdc_store8_beu64)
(stdc_store8_leu16, stdc_store8_leu32, stdc_store8_leu64):
Avoid unnecessary and sometimes-confusing casts.

3 months agostdbit-h: simplify stdc_{load,store)_[bl]e[s]*
Paul Eggert [Fri, 13 Mar 2026 19:25:11 +0000 (12:25 -0700)] 
stdbit-h: simplify stdc_{load,store)_[bl]e[s]*

* lib/stdbit.in.h (stdc_load8_bes8, stdc_load8_bes16)
(stdc_load8_bes32, stdc_load8_bes64, stdc_load8_les8)
(stdc_load8_les16, stdc_load8_les32, stdc_load8_les64)
(stdc_store8_bes8, stdc_store8_bes16, stdc_store8_bes32)
(stdc_store8_bes64, stdc_store8_les8, stdc_store8_les16)
(stdc_store8_les32, stdc_store8_les64):
Simplify by deferring to the unsigned counterpart.