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The GNU Coding Standards specify that line breaks in expressions
should go before an operator, not after one. This patch fixes various
code to do this. It only changes code that appears to be mostly
following GNU style anyway, not files and directories with
substantially different formatting. It is not exhaustive even for
files using GNU style (for example, changes to sysdeps files are
deferred for subsequent cleanups). Some files changed are shared with
gnulib, but most are specific to glibc. Changes were made manually,
with places to change found by grep (so some cases, e.g. where the
operator was followed by a comment at end of line, are particularly
liable to have been missed by grep, but I did include cases where the
operator was followed by backslash-newline).
This patch generally does not attempt to address other coding style
issues in the expressions changed (for example, missing spaces before
'(', or lack of parentheses to ensure indentation of continuation
lines properly reflects operator precedence).
Tested for x86_64, and with build-many-glibcs.py.
* benchtests/bench-memmem.c (simple_memmem): Break lines before
rather than after operators.
* benchtests/bench-skeleton.c (TIMESPEC_AFTER): Likewise.
* crypt/md5.c (md5_finish_ctx): Likewise.
* crypt/sha256.c (__sha256_finish_ctx): Likewise.
* crypt/sha512.c (__sha512_finish_ctx): Likewise.
* elf/cache.c (load_aux_cache): Likewise.
* elf/dl-load.c (open_verify): Likewise.
* elf/get-dynamic-info.h (elf_get_dynamic_info): Likewise.
* elf/readelflib.c (process_elf_file): Likewise.
* elf/rtld.c (dl_main): Likewise.
* elf/sprof.c (generate_call_graph): Likewise.
* hurd/ctty-input.c (_hurd_ctty_input): Likewise.
* hurd/ctty-output.c (_hurd_ctty_output): Likewise.
* hurd/dtable.c (reauth_dtable): Likewise.
* hurd/getdport.c (__getdport): Likewise.
* hurd/hurd/signal.h (_hurd_interrupted_rpc_timeout): Likewise.
* hurd/hurd/sigpreempt.h (HURD_PREEMPT_SIGNAL_P): Likewise.
* hurd/hurdfault.c (_hurdsig_fault_catch_exception_raise):
Likewise.
* hurd/hurdioctl.c (fioctl): Likewise.
* hurd/hurdselect.c (_hurd_select): Likewise.
* hurd/hurdsig.c (_hurdsig_abort_rpcs): Likewise.
(STOPSIGS): Likewise.
* hurd/hurdstartup.c (_hurd_startup): Likewise.
* hurd/intr-msg.c (_hurd_intr_rpc_mach_msg): Likewise.
* hurd/lookup-retry.c (__hurd_file_name_lookup_retry): Likewise.
* hurd/msgportdemux.c (msgport_server): Likewise.
* hurd/setauth.c (_hurd_setauth): Likewise.
* include/features.h (__GLIBC_USE_DEPRECATED_SCANF): Likewise.
* libio/libioP.h [IO_DEBUG] (CHECK_FILE): Likewise.
* locale/programs/ld-ctype.c (set_class_defaults): Likewise.
* localedata/tests-mbwc/tst_swscanf.c (tst_swscanf): Likewise.
* login/tst-utmp.c (do_check): Likewise.
(simulate_login): Likewise.
* mach/lowlevellock.h (lll_lock): Likewise.
(lll_trylock): Likewise.
* math/test-fenv.c (ALL_EXC): Likewise.
* math/test-fenvinline.c (ALL_EXC): Likewise.
* misc/sys/cdefs.h (__attribute_deprecated_msg__): Likewise.
* nis/nis_call.c (__do_niscall3): Likewise.
* nis/nis_callback.c (cb_prog_1): Likewise.
* nis/nis_defaults.c (searchaccess): Likewise.
* nis/nis_findserv.c (__nis_findfastest_with_timeout): Likewise.
* nis/nis_ismember.c (internal_ismember): Likewise.
* nis/nis_local_names.c (nis_local_principal): Likewise.
* nis/nss_nis/nis-rpc.c (_nss_nis_getrpcbyname_r): Likewise.
* nis/nss_nisplus/nisplus-netgrp.c (_nss_nisplus_getnetgrent_r):
Likewise.
* nis/ypclnt.c (yp_match): Likewise.
(yp_first): Likewise.
(yp_next): Likewise.
(yp_master): Likewise.
(yp_order): Likewise.
* nscd/hstcache.c (cache_addhst): Likewise.
* nscd/initgrcache.c (addinitgroupsX): Likewise.
* nss/nss_compat/compat-pwd.c (copy_pwd_changes): Likewise.
(internal_getpwuid_r): Likewise.
* nss/nss_compat/compat-spwd.c (copy_spwd_changes): Likewise.
* posix/glob.h (__GLOB_FLAGS): Likewise.
* posix/regcomp.c (peek_token): Likewise.
(peek_token_bracket): Likewise.
(parse_expression): Likewise.
* posix/regexec.c (sift_states_iter_mb): Likewise.
(check_node_accept_bytes): Likewise.
* posix/tst-spawn3.c (do_test): Likewise.
* posix/wordexp-test.c (testit): Likewise.
* posix/wordexp.c (parse_tilde): Likewise.
(exec_comm): Likewise.
* posix/wordexp.h (__WRDE_FLAGS): Likewise.
* resource/vtimes.c (TIMEVAL_TO_VTIMES): Likewise.
* setjmp/sigjmp.c (__sigjmp_save): Likewise.
* stdio-common/printf_fp.c (__printf_fp_l): Likewise.
* stdio-common/tst-fileno.c (do_test): Likewise.
* stdio-common/vfprintf-internal.c (vfprintf): Likewise.
* stdlib/strfmon_l.c (__vstrfmon_l_internal): Likewise.
* stdlib/strtod_l.c (round_and_return): Likewise.
(____STRTOF_INTERNAL): Likewise.
* stdlib/tst-strfrom.h (TEST_STRFROM): Likewise.
* string/strcspn.c (STRCSPN): Likewise.
* string/test-memmem.c (simple_memmem): Likewise.
* termios/tcsetattr.c (tcsetattr): Likewise.
* time/alt_digit.c (_nl_parse_alt_digit): Likewise.
* time/asctime.c (asctime_internal): Likewise.
* time/strptime_l.c (__strptime_internal): Likewise.
* time/sys/time.h (timercmp): Likewise.
* time/tzfile.c (__tzfile_compute): Likewise.
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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posix/wordexp-test.c used libc-internal.h for PTR_ALIGN_DOWN; similar
to what was done with libc-diag.h, I have split the definitions of
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN
to a new header, libc-pointer-arith.h.
It then occurred to me that the remaining declarations in libc-internal.h
are mostly to do with early initialization, and probably most of the
files including it, even in the core code, don't need it anymore. Indeed,
only 19 files actually need what remains of libc-internal.h. 23 others
need libc-diag.h instead, and 12 need libc-pointer-arith.h instead.
No file needs more than one of them, and 16 don't need any of them!
So, with this patch, libc-internal.h stops including libc-diag.h as
well as losing the pointer arithmetic macros, and all including files
are adjusted.
* include/libc-pointer-arith.h: New file. Define
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and
PTR_ALIGN_DOWN here.
* include/libc-internal.h: Definitions of above macros
moved from here. Don't include libc-diag.h anymore either.
* posix/wordexp-test.c: Include stdint.h and libc-pointer-arith.h.
Don't include libc-internal.h.
* debug/pcprofile.c, elf/dl-tunables.c, elf/soinit.c, io/openat.c
* io/openat64.c, misc/ptrace.c, nptl/pthread_clock_gettime.c
* nptl/pthread_clock_settime.c, nptl/pthread_cond_common.c
* string/strcoll_l.c, sysdeps/nacl/brk.c
* sysdeps/unix/clock_settime.c
* sysdeps/unix/sysv/linux/i386/get_clockfreq.c
* sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
* sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
* sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c:
Don't include libc-internal.h.
* elf/get-dynamic-info.h, iconv/loop.c
* iconvdata/iso-2022-cn-ext.c, locale/weight.h, locale/weightwc.h
* misc/reboot.c, nis/nis_table.c, nptl_db/thread_dbP.h
* nscd/connections.c, resolv/res_send.c, soft-fp/fmadf4.c
* soft-fp/fmasf4.c, soft-fp/fmatf4.c, stdio-common/vfscanf.c
* sysdeps/ieee754/dbl-64/e_lgamma_r.c
* sysdeps/ieee754/dbl-64/k_rem_pio2.c
* sysdeps/ieee754/flt-32/e_lgammaf_r.c
* sysdeps/ieee754/flt-32/k_rem_pio2f.c
* sysdeps/ieee754/ldbl-128/k_tanl.c
* sysdeps/ieee754/ldbl-128ibm/k_tanl.c
* sysdeps/ieee754/ldbl-96/e_lgammal_r.c
* sysdeps/ieee754/ldbl-96/k_tanl.c, sysdeps/nptl/futex-internal.h:
Include libc-diag.h instead of libc-internal.h.
* elf/dl-load.c, elf/dl-reloc.c, locale/programs/locarchive.c
* nptl/nptl-init.c, string/strcspn.c, string/strspn.c
* malloc/malloc.c, sysdeps/i386/nptl/tls.h
* sysdeps/nacl/dl-map-segments.h, sysdeps/x86_64/atomic-machine.h
* sysdeps/unix/sysv/linux/spawni.c
* sysdeps/x86_64/nptl/tls.h:
Include libc-pointer-arith.h instead of libc-internal.h.
* elf/get-dynamic-info.h, sysdeps/nacl/dl-map-segments.h
* sysdeps/x86_64/atomic-machine.h:
Add multiple include guard.
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Tested on aarch64.
* string/strcspn.c (strcspn): Use PTR_ALIGN_DOWN.
* string/strspn.c (strspn): Likewise.
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Improve strcspn performance using a much faster algorithm. It is kept simple
so it works well on most targets. It is generally at least 10 times faster
than the existing implementation on bench-strcspn on a few AArch64
implementations, and for some tests 100 times as fast (repeatedly calling
strchr on a small string is extremely slow...).
In fact the string/bits/string2.h inlines make no longer sense, as GCC
already uses strlen if reject is an empty string, strchrnul is 5 times as
fast as __strcspn_c1, while __strcspn_c2 and __strcspn_c3 are slower than
the strcspn main loop for large strings (though reject length 2-4 could be
special cased in the future to gain even more performance).
Tested on x86_64, i686, and aarch64.
* string/Version (libc): Add GLIBC_2.24.
* string/strcspn.c (strcspn): Rewrite function.
* string/bits/string2.h (strcspn): Use __builtin_strcspn.
(__strcspn_c1): Remove inline function.
(__strcspn_c2): Likewise.
(__strcspn_c3): Likewise.
* string/string-inline.c
[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c1): Add
compatibility symbol.
[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c2):
Likewise.
[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c3):
Likewise.
* sysdeps/i386/string-inlines.c: Include generic string-inlines.c.
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This patch add a optimized strcspn for POWER7 by using a different
algorithm than default implementation: it constructs a table based on
the 'accept' argument and use this table to check for any occurance
on the input string. The idea is similar as x86_64 uses.
For PowerPC some tunings were added, such as unroll loops and align
stack memory to table to 16 bytes (so VSX clean can ran without
alignment issues).
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