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Update the gawk regex engine from the upstream gawk.git as detailed in
the README added in a previous change.
This is from gawk.git's gawk-4.1.0-2558-gb2651a80 which is the same
code as in the stable gawk-4.1.4 release, but with one trivial change
on top added in commit 725d2f78 ("Add small regex fix. Add support
directory.", 2016-12-22)[1]
The two patches applied on top of the upstream engine are to,
respectively:
* Add a notice at the top of each file saying that this copy is
maintained by the Git project.
* Remove the dependency on gawk's verify.h. The library compiles
as-is when this header file is present, but unfortunately it's
under GPL v3, unlike the rest of the files which is under LGPL 2.1
or later.
The changes made in commit a997bf423d ("compat/regex: get the gawk
regex engine to compile within git", 2010-08-17) turned out to be
redundant to achieving the same with defining a few flags to make the
code itself do similar things.
In addition the -DNO_MBSUPPORT flag is not needed, upstream removed
the code that relied on that. It's possible that either -DHAVE_BTOWC
or -D_GNU_SOURCE could cause some problems on non-GNU systems.
The -DHAVE_BTOWC flag indicates that wchar.h has a btowc(3). This
function is defined in POSIX.1-2001 & C99 and later.
The -D_GNU_SOURCE flag is needed because the library itself does:
#ifndef _LIBC
#define __USE_GNU 1
#endif
Which is subsequently picked up by GNU C library headers:
In file included from compat/regex/regex_internal.h:32:0,
from compat/regex/regex.c:76:
/usr/include/stdio.h:316:6: error: unknown type name ‘_IO_cookie_io_functions_t’; did you mean ‘__fortify_function’?
_IO_cookie_io_functions_t __io_funcs) __THROW __wur;
^~~~~~~~~~~~~~~~~~~~~~~~~
1. http://git.savannah.gnu.org/cgit/gawk.git/commit/?id=725d2f78
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Some of these were found using Lucas De Marchi's codespell tool.
Others noticed by Eric Sunshine.
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Acked-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Wrap variables that were only used RE_ENABLE_I18N in `#ifdef
RE_ENABLE_I18N`. This eliminates compiler warnings when compiling with
NO_REGEX=YesPlease.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Change the regex engine in compat to use the gawk engine from the
gawk-devel module in gawk CVS. This engine supports the REG_STARTEND
flag, which was optionally available in Git since v1.7.2-rc0~77^2~1.
The source was grabbed from cvs.savannah.gnu.org:/sources/gawk, and
these are the upstream versions of the files being included:
regcomp.c 1.4
regex.h 1.3
regex.h 1.3
regex_internal.c 1.3
regex_internal.h 1.3
regexec.c 1.3
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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