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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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Since commit 56a1a3ab ("Silence GCC's \"cast of pointer to integer of a
different size\" warning", 26-10-2015), sparse has been issuing a macro
redefinition warning for the SIZE_MAX macro. However, gcc did not issue
any such warning.
After commit 56a1a3ab, in terms of the order of #includes and #defines,
the code looked something like:
$ cat -n junk.c
1 #include <stddef.h>
2
3 #define SIZE_MAX ((size_t) -1)
4
5 #include <stdint.h>
6
7 int main(int argc, char *argv[])
8 {
9 return 0;
10 }
$
$ gcc junk.c
$
However, if you compile that file with -Wsystem-headers, then it will
also issue a warning. Having set -Wsystem-headers in CFLAGS, using the
config.mak file, then (on cygwin):
$ make compat/regex/regex.o
CC compat/regex/regex.o
In file included from /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/include/stdint.h:9:0,
from compat/regex/regcomp.c:21,
from compat/regex/regex.c:77:
/usr/include/stdint.h:362:0: warning: "SIZE_MAX" redefined
#define SIZE_MAX (__SIZE_MAX__)
^
In file included from compat/regex/regex.c:69:0:
compat/regex/regex_internal.h:108:0: note: this is the location of the previous definition
# define SIZE_MAX ((size_t) -1)
^
$
The compilation of the compat/regex code is somewhat unusual in that the
regex.c file directly #includes the other c files (regcomp.c, regexec.c
and regex_internal.c). Commit 56a1a3ab added an #include of <stdint.h>
to the regcomp.c file, which results in the redefinition, since this is
included after the regex_internal.h header. This header file contains a
'fallback' definition for SIZE_MAX, in order to support systems which do
not have the <stdint.h> header (the HAVE_STDINT_H macro is not defined).
In order to suppress the warning, we move the #include of <stdint.h>
from regcomp.c to the start of the compilation unit, close to the top
of regex.c, prior to the #include of the regex_internal.h header.
Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.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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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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Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Acked-by: Sebastian Schuberth <sschuberth@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The MSVC headers typedef errcode as int, and thus confused the compiler in
the K&R style definition. ANSI style deconfuses it.
Signed-off-by: Frank Li <lznuaa@gmail.com>
Signed-off-by: Marius Storm-Olsen <mstormo@gmail.com>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Mike Ralphson <mike@abacus.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The standard libc regex library on OSX does not support alternation
in POSIX Basic Regular Expression mode. This breaks the diff.funcname
functionality on OSX.
To fix this, we use the GNU regex library which is already present in
the compat/ diretory for the MinGW port. However, simply adding compat/
to the COMPAT_CFLAGS variable causes a conflict between the system
fnmatch.h and the one present in compat/. To remedy this, move the
regex and fnmatch functionality to their own subdirectories in compat/
so they can be included seperately.
Signed-off-by: Arjen Laarhoven <arjen@yaph.org>
Tested-by: Mike Ralphson <mike@abacus.co.uk> (AIX)
Tested-by: Johannes Sixt <johannes.sixt@telecom.at> (MinGW)
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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