Import strchrnul from gnulib and use it
For a forthcoming patch, I need a "skip_to_colon" function. I noticed there are two skip_to_semicolon (one in gdb and one in gdbserver). I thought we could put it in common/, and generalize it for any character. It turns out that the strchrnul function does exactly that. I imported the corresponding module from gnulib, for those systems that do not have it. There are probably more places where this function can be used instead of doing the work by hand (I am looking at remote-utils.c::look_up_one_symbol). gdb/ChangeLog: * remote.c (skip_to_semicolon): Remove. (remote_parse_stop_reply): Use strchrnul instead of skip_to_semicolon. * gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Add strchrnul. * gnulib/aclocal.m4: Regenerate. * gnulib/config.in: Regenerate. * gnulib/configure: Regenerate. * gnulib/import/Makefile.am: Regenerate. * gnulib/import/Makefile.in: Regenerate. * gnulib/import/m4/gnulib-cache.m4: Regenerate. * gnulib/import/m4/gnulib-comp.m4: Regenerate. * gnulib/import/m4/rawmemchr.m4: New file. * gnulib/import/m4/strchrnul.m4: New file. * gnulib/import/rawmemchr.c: New file. * gnulib/import/rawmemchr.valgrind: New file. * gnulib/import/strchrnul.c: New file. * gnulib/import/strchrnul.valgrind: New file. gdb/gdbserver/ChangeLog: * server.c (skip_to_semicolon): Remove. (process_point_options): Use strchrnul instead of skip_to_semicolon.
This commit is contained in:
Simon Marchi
parent
7fe8399de9
commit
8424cc978c
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@ -1,3 +1,24 @@
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2016-01-28 Simon Marchi <simon.marchi@ericsson.com>
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* remote.c (skip_to_semicolon): Remove.
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(remote_parse_stop_reply): Use strchrnul instead of
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skip_to_semicolon.
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* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Add
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strchrnul.
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* gnulib/aclocal.m4: Regenerate.
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* gnulib/config.in: Regenerate.
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* gnulib/configure: Regenerate.
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* gnulib/import/Makefile.am: Regenerate.
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* gnulib/import/Makefile.in: Regenerate.
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* gnulib/import/m4/gnulib-cache.m4: Regenerate.
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* gnulib/import/m4/gnulib-comp.m4: Regenerate.
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* gnulib/import/m4/rawmemchr.m4: New file.
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* gnulib/import/m4/strchrnul.m4: New file.
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* gnulib/import/rawmemchr.c: New file.
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* gnulib/import/rawmemchr.valgrind: New file.
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* gnulib/import/strchrnul.c: New file.
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* gnulib/import/strchrnul.valgrind: New file.
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2016-01-28 Yao Qi <yao.qi@linaro.org>
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* breakpoint.c (build_target_command_list): Don't call continue
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@ -1,3 +1,9 @@
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2016-01-28 Simon Marchi <simon.marchi@ericsson.com>
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* server.c (skip_to_semicolon): Remove.
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(process_point_options): Use strchrnul instead of
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skip_to_semicolon.
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2016-01-26 Yao Qi <yao.qi@linaro.org>
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* linux-arm-low.c (arm_gdbserver_get_next_pcs): Remove argument pc.
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@ -3820,15 +3820,6 @@ main (int argc, char *argv[])
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gdb_assert_not_reached ("captured_main should never return");
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}
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/* Skip PACKET until the next semi-colon (or end of string). */
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static void
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skip_to_semicolon (char **packet)
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{
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while (**packet != '\0' && **packet != ';')
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(*packet)++;
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}
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/* Process options coming from Z packets for a breakpoint. PACKET is
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the packet buffer. *PACKET is updated to point to the first char
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after the last processed option. */
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@ -3856,7 +3847,7 @@ process_point_options (struct breakpoint *bp, char **packet)
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if (debug_threads)
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debug_printf ("Found breakpoint condition.\n");
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if (!add_breakpoint_condition (bp, &dataptr))
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skip_to_semicolon (&dataptr);
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dataptr = strchrnul (dataptr, ';');
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}
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else if (startswith (dataptr, "cmds:"))
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{
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@ -3866,14 +3857,14 @@ process_point_options (struct breakpoint *bp, char **packet)
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persist = (*dataptr == '1');
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dataptr += 2;
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if (add_breakpoint_commands (bp, &dataptr, persist))
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skip_to_semicolon (&dataptr);
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dataptr = strchrnul (dataptr, ';');
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}
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else
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{
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fprintf (stderr, "Unknown token %c, ignoring.\n",
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*dataptr);
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/* Skip tokens until we find one that we recognize. */
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skip_to_semicolon (&dataptr);
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dataptr = strchrnul (dataptr, ';');
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}
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}
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*packet = dataptr;
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@ -1064,6 +1064,7 @@ m4_include([import/m4/multiarch.m4])
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m4_include([import/m4/nocrash.m4])
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m4_include([import/m4/off_t.m4])
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m4_include([import/m4/pathmax.m4])
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m4_include([import/m4/rawmemchr.m4])
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m4_include([import/m4/readlink.m4])
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m4_include([import/m4/rename.m4])
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m4_include([import/m4/rmdir.m4])
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@ -1075,6 +1076,7 @@ m4_include([import/m4/stddef_h.m4])
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m4_include([import/m4/stdint.m4])
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m4_include([import/m4/stdio_h.m4])
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m4_include([import/m4/stdlib_h.m4])
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m4_include([import/m4/strchrnul.m4])
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m4_include([import/m4/string_h.m4])
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m4_include([import/m4/strstr.m4])
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m4_include([import/m4/strtok_r.m4])
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@ -113,6 +113,9 @@
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/* Define to 1 when the gnulib module memmem should be tested. */
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#undef GNULIB_TEST_MEMMEM
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/* Define to 1 when the gnulib module rawmemchr should be tested. */
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#undef GNULIB_TEST_RAWMEMCHR
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/* Define to 1 when the gnulib module readlink should be tested. */
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#undef GNULIB_TEST_READLINK
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@ -128,6 +131,9 @@
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/* Define to 1 when the gnulib module stat should be tested. */
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#undef GNULIB_TEST_STAT
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/* Define to 1 when the gnulib module strchrnul should be tested. */
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#undef GNULIB_TEST_STRCHRNUL
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/* Define to 1 when the gnulib module strstr should be tested. */
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#undef GNULIB_TEST_STRSTR
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@ -276,6 +282,9 @@
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/* Define to 1 if you have the `mprotect' function. */
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#undef HAVE_MPROTECT
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/* Define to 1 if you have the `rawmemchr' function. */
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#undef HAVE_RAWMEMCHR
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/* Define to 1 if acosf is declared even after undefining macros. */
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#undef HAVE_RAW_DECL_ACOSF
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@ -1117,6 +1126,9 @@
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/* Define to 1 if you have the <stdlib.h> header file. */
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#undef HAVE_STDLIB_H
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/* Define to 1 if you have the `strchrnul' function. */
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#undef HAVE_STRCHRNUL
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/* Define to 1 if you have the <strings.h> header file. */
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#undef HAVE_STRINGS_H
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@ -5320,6 +5320,7 @@ fi
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# Code from module multiarch:
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# Code from module nocrash:
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# Code from module pathmax:
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# Code from module rawmemchr:
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# Code from module readlink:
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# Code from module rename:
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# Code from module rmdir:
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@ -5336,6 +5337,7 @@ fi
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# Code from module stdint:
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# Code from module stdio:
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# Code from module stdlib:
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# Code from module strchrnul:
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# Code from module streq:
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# Code from module string:
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# Code from module strnlen1:
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@ -16121,6 +16123,53 @@ $as_echo "#define GNULIB_TEST_MEMMEM 1" >>confdefs.h
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for ac_func in rawmemchr
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do :
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ac_fn_c_check_func "$LINENO" "rawmemchr" "ac_cv_func_rawmemchr"
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if test "x$ac_cv_func_rawmemchr" = x""yes; then :
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cat >>confdefs.h <<_ACEOF
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#define HAVE_RAWMEMCHR 1
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_ACEOF
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fi
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done
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if test $ac_cv_func_rawmemchr = no; then
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HAVE_RAWMEMCHR=0
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fi
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if test $HAVE_RAWMEMCHR = 0; then
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gl_LIBOBJS="$gl_LIBOBJS rawmemchr.$ac_objext"
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:
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fi
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GNULIB_RAWMEMCHR=1
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$as_echo "#define GNULIB_TEST_RAWMEMCHR 1" >>confdefs.h
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if test $ac_cv_func_readlink = no; then
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HAVE_READLINK=0
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else
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@ -17428,6 +17477,115 @@ fi
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for ac_func in strchrnul
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do :
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ac_fn_c_check_func "$LINENO" "strchrnul" "ac_cv_func_strchrnul"
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if test "x$ac_cv_func_strchrnul" = x""yes; then :
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cat >>confdefs.h <<_ACEOF
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#define HAVE_STRCHRNUL 1
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_ACEOF
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fi
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done
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if test $ac_cv_func_strchrnul = no; then
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HAVE_STRCHRNUL=0
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether strchrnul works" >&5
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$as_echo_n "checking whether strchrnul works... " >&6; }
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if test "${gl_cv_func_strchrnul_works+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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if test "$cross_compiling" = yes; then :
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#if defined __CYGWIN__
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#include <cygwin/version.h>
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#if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 9)
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Lucky user
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#endif
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#else
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Lucky user
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#endif
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "Lucky user" >/dev/null 2>&1; then :
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gl_cv_func_strchrnul_works="guessing yes"
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else
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gl_cv_func_strchrnul_works="guessing no"
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fi
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rm -f conftest*
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <string.h> /* for strchrnul */
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int
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main ()
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{
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const char *buf = "a";
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return strchrnul (buf, 'b') != buf + 1;
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_run "$LINENO"; then :
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gl_cv_func_strchrnul_works=yes
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else
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gl_cv_func_strchrnul_works=no
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_strchrnul_works" >&5
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$as_echo "$gl_cv_func_strchrnul_works" >&6; }
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case "$gl_cv_func_strchrnul_works" in
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*yes) ;;
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*) REPLACE_STRCHRNUL=1 ;;
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esac
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fi
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if test $HAVE_STRCHRNUL = 0 || test $REPLACE_STRCHRNUL = 1; then
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gl_LIBOBJS="$gl_LIBOBJS strchrnul.$ac_objext"
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:
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fi
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GNULIB_STRCHRNUL=1
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$as_echo "#define GNULIB_TEST_STRCHRNUL 1" >>confdefs.h
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if test $REPLACE_STRSTR = 0; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether strstr works in linear time" >&5
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@ -21,7 +21,7 @@
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# the same distribution terms as the rest of that program.
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#
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# Generated by gnulib-tool.
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# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes lstat memchr memmem pathmax readlink rename signal-h strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
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# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes lstat memchr memmem pathmax readlink rename signal-h strchrnul strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
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AUTOMAKE_OPTIONS = 1.9.6 gnits
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@ -842,6 +842,15 @@ EXTRA_DIST += pathmax.h
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## end gnulib module pathmax
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## begin gnulib module rawmemchr
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EXTRA_DIST += rawmemchr.c rawmemchr.valgrind
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EXTRA_libgnu_a_SOURCES += rawmemchr.c
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## end gnulib module rawmemchr
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## begin gnulib module readlink
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@ -1345,6 +1354,15 @@ EXTRA_DIST += stdlib.in.h
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## end gnulib module stdlib
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## begin gnulib module strchrnul
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EXTRA_DIST += strchrnul.c strchrnul.valgrind
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EXTRA_libgnu_a_SOURCES += strchrnul.c
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## end gnulib module strchrnul
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## begin gnulib module streq
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@ -36,7 +36,7 @@
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# the same distribution terms as the rest of that program.
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#
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# Generated by gnulib-tool.
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# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes lstat memchr memmem pathmax readlink rename signal-h strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
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# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes lstat memchr memmem pathmax readlink rename signal-h strchrnul strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
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@ -115,6 +115,7 @@ am__aclocal_m4_deps = $(top_srcdir)/import/m4/00gnulib.m4 \
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$(top_srcdir)/import/m4/nocrash.m4 \
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$(top_srcdir)/import/m4/off_t.m4 \
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$(top_srcdir)/import/m4/pathmax.m4 \
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$(top_srcdir)/import/m4/rawmemchr.m4 \
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$(top_srcdir)/import/m4/readlink.m4 \
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$(top_srcdir)/import/m4/rename.m4 \
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$(top_srcdir)/import/m4/rmdir.m4 \
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@ -126,6 +127,7 @@ am__aclocal_m4_deps = $(top_srcdir)/import/m4/00gnulib.m4 \
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$(top_srcdir)/import/m4/stdint.m4 \
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$(top_srcdir)/import/m4/stdio_h.m4 \
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$(top_srcdir)/import/m4/stdlib_h.m4 \
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$(top_srcdir)/import/m4/strchrnul.m4 \
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$(top_srcdir)/import/m4/string_h.m4 \
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$(top_srcdir)/import/m4/strstr.m4 \
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$(top_srcdir)/import/m4/strtok_r.m4 \
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@ -1277,17 +1279,18 @@ EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h \
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ref-add.sin ref-del.sin lstat.c malloc.c malloca.h \
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malloca.valgrind math.in.h mbrtowc.c mbsinit.c \
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mbsrtowcs-impl.h mbsrtowcs-state.c mbsrtowcs.c memchr.c \
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||||
memchr.valgrind memmem.c str-two-way.h pathmax.h readlink.c \
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rename.c rmdir.c same-inode.h signal.in.h \
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$(top_srcdir)/import/extra/snippet/_Noreturn.h \
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memchr.valgrind memmem.c str-two-way.h pathmax.h rawmemchr.c \
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rawmemchr.valgrind readlink.c rename.c rmdir.c same-inode.h \
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signal.in.h $(top_srcdir)/import/extra/snippet/_Noreturn.h \
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$(top_srcdir)/import/extra/snippet/arg-nonnull.h \
|
||||
$(top_srcdir)/import/extra/snippet/c++defs.h \
|
||||
$(top_srcdir)/import/extra/snippet/warn-on-use.h stat.c \
|
||||
stdbool.in.h stddef.in.h stdint.in.h stdio.in.h stdlib.in.h \
|
||||
streq.h string.in.h str-two-way.h strstr.c strtok_r.c \
|
||||
sys_stat.in.h sys_time.in.h sys_types.in.h time.in.h \
|
||||
unistd.in.h $(top_srcdir)/import/extra/update-copyright \
|
||||
verify.h wchar.in.h wctype.in.h
|
||||
strchrnul.c strchrnul.valgrind streq.h string.in.h \
|
||||
str-two-way.h strstr.c strtok_r.c sys_stat.in.h sys_time.in.h \
|
||||
sys_types.in.h time.in.h unistd.in.h \
|
||||
$(top_srcdir)/import/extra/update-copyright verify.h \
|
||||
wchar.in.h wctype.in.h
|
||||
|
||||
# The BUILT_SOURCES created by this Makefile snippet are not used via #include
|
||||
# statements but through direct file reference. Therefore this snippet must be
|
||||
|
|
@ -1330,8 +1333,8 @@ EXTRA_libgnu_a_SOURCES = alloca.c canonicalize-lgpl.c dirfd.c float.c \
|
|||
itold.c fnmatch.c fnmatch_loop.c frexp.c frexp.c frexpl.c \
|
||||
gettimeofday.c isnan.c isnand.c isnan.c isnanl.c lstat.c \
|
||||
malloc.c mbrtowc.c mbsinit.c mbsrtowcs-state.c mbsrtowcs.c \
|
||||
memchr.c memmem.c readlink.c rename.c rmdir.c stat.c strstr.c \
|
||||
strtok_r.c
|
||||
memchr.c memmem.c rawmemchr.c readlink.c rename.c rmdir.c \
|
||||
stat.c strchrnul.c strstr.c strtok_r.c
|
||||
|
||||
# Use this preprocessor expression to decide whether #include_next works.
|
||||
# Do not rely on a 'configure'-time test for this, since the expression
|
||||
|
|
@ -1432,10 +1435,12 @@ distclean-compile:
|
|||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mbsrtowcs.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/memchr.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/memmem.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rawmemchr.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/readlink.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rename.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rmdir.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/stat.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/strchrnul.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/stripslash.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/strnlen1.Po@am__quote@
|
||||
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/strstr.Po@am__quote@
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@
|
|||
|
||||
|
||||
# Specification in the form of a command-line invocation:
|
||||
# gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes lstat memchr memmem pathmax readlink rename signal-h strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
|
||||
# gnulib-tool --import --dir=. --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes lstat memchr memmem pathmax readlink rename signal-h strchrnul strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
|
||||
|
||||
# Specification in the form of a few gnulib-tool.m4 macro invocations:
|
||||
gl_LOCAL_DIR([])
|
||||
|
|
@ -47,6 +47,7 @@ gl_MODULES([
|
|||
readlink
|
||||
rename
|
||||
signal-h
|
||||
strchrnul
|
||||
strstr
|
||||
strtok_r
|
||||
sys_stat
|
||||
|
|
|
|||
|
|
@ -83,6 +83,7 @@ AC_DEFUN([gl_EARLY],
|
|||
# Code from module multiarch:
|
||||
# Code from module nocrash:
|
||||
# Code from module pathmax:
|
||||
# Code from module rawmemchr:
|
||||
# Code from module readlink:
|
||||
# Code from module rename:
|
||||
# Code from module rmdir:
|
||||
|
|
@ -99,6 +100,7 @@ AC_DEFUN([gl_EARLY],
|
|||
# Code from module stdint:
|
||||
# Code from module stdio:
|
||||
# Code from module stdlib:
|
||||
# Code from module strchrnul:
|
||||
# Code from module streq:
|
||||
# Code from module string:
|
||||
# Code from module strnlen1:
|
||||
|
|
@ -251,6 +253,12 @@ AC_DEFUN([gl_INIT],
|
|||
gl_STRING_MODULE_INDICATOR([memmem])
|
||||
gl_MULTIARCH
|
||||
gl_PATHMAX
|
||||
gl_FUNC_RAWMEMCHR
|
||||
if test $HAVE_RAWMEMCHR = 0; then
|
||||
AC_LIBOBJ([rawmemchr])
|
||||
gl_PREREQ_RAWMEMCHR
|
||||
fi
|
||||
gl_STRING_MODULE_INDICATOR([rawmemchr])
|
||||
gl_FUNC_READLINK
|
||||
if test $HAVE_READLINK = 0 || test $REPLACE_READLINK = 1; then
|
||||
AC_LIBOBJ([readlink])
|
||||
|
|
@ -280,6 +288,12 @@ AC_DEFUN([gl_INIT],
|
|||
gl_STDINT_H
|
||||
gl_STDIO_H
|
||||
gl_STDLIB_H
|
||||
gl_FUNC_STRCHRNUL
|
||||
if test $HAVE_STRCHRNUL = 0 || test $REPLACE_STRCHRNUL = 1; then
|
||||
AC_LIBOBJ([strchrnul])
|
||||
gl_PREREQ_STRCHRNUL
|
||||
fi
|
||||
gl_STRING_MODULE_INDICATOR([strchrnul])
|
||||
gl_HEADER_STRING_H
|
||||
gl_FUNC_STRSTR
|
||||
if test $REPLACE_STRSTR = 1; then
|
||||
|
|
@ -497,6 +511,8 @@ AC_DEFUN([gl_FILE_LIST], [
|
|||
lib/memchr.valgrind
|
||||
lib/memmem.c
|
||||
lib/pathmax.h
|
||||
lib/rawmemchr.c
|
||||
lib/rawmemchr.valgrind
|
||||
lib/readlink.c
|
||||
lib/ref-add.sin
|
||||
lib/ref-del.sin
|
||||
|
|
@ -511,6 +527,8 @@ AC_DEFUN([gl_FILE_LIST], [
|
|||
lib/stdio.in.h
|
||||
lib/stdlib.in.h
|
||||
lib/str-two-way.h
|
||||
lib/strchrnul.c
|
||||
lib/strchrnul.valgrind
|
||||
lib/streq.h
|
||||
lib/string.in.h
|
||||
lib/stripslash.c
|
||||
|
|
@ -579,6 +597,7 @@ AC_DEFUN([gl_FILE_LIST], [
|
|||
m4/nocrash.m4
|
||||
m4/off_t.m4
|
||||
m4/pathmax.m4
|
||||
m4/rawmemchr.m4
|
||||
m4/readlink.m4
|
||||
m4/rename.m4
|
||||
m4/rmdir.m4
|
||||
|
|
@ -590,6 +609,7 @@ AC_DEFUN([gl_FILE_LIST], [
|
|||
m4/stdint.m4
|
||||
m4/stdio_h.m4
|
||||
m4/stdlib_h.m4
|
||||
m4/strchrnul.m4
|
||||
m4/string_h.m4
|
||||
m4/strstr.m4
|
||||
m4/strtok_r.m4
|
||||
|
|
|
|||
|
|
@ -0,0 +1,20 @@
|
|||
# rawmemchr.m4 serial 2
|
||||
dnl Copyright (C) 2003, 2007-2015 Free Software Foundation, Inc.
|
||||
dnl This file is free software; the Free Software Foundation
|
||||
dnl gives unlimited permission to copy and/or distribute it,
|
||||
dnl with or without modifications, as long as this notice is preserved.
|
||||
|
||||
AC_DEFUN([gl_FUNC_RAWMEMCHR],
|
||||
[
|
||||
dnl Persuade glibc <string.h> to declare rawmemchr().
|
||||
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
|
||||
|
||||
AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
|
||||
AC_CHECK_FUNCS([rawmemchr])
|
||||
if test $ac_cv_func_rawmemchr = no; then
|
||||
HAVE_RAWMEMCHR=0
|
||||
fi
|
||||
])
|
||||
|
||||
# Prerequisites of lib/strchrnul.c.
|
||||
AC_DEFUN([gl_PREREQ_RAWMEMCHR], [:])
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
# strchrnul.m4 serial 9
|
||||
dnl Copyright (C) 2003, 2007, 2009-2015 Free Software Foundation, Inc.
|
||||
dnl This file is free software; the Free Software Foundation
|
||||
dnl gives unlimited permission to copy and/or distribute it,
|
||||
dnl with or without modifications, as long as this notice is preserved.
|
||||
|
||||
AC_DEFUN([gl_FUNC_STRCHRNUL],
|
||||
[
|
||||
dnl Persuade glibc <string.h> to declare strchrnul().
|
||||
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
|
||||
|
||||
AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
|
||||
AC_CHECK_FUNCS([strchrnul])
|
||||
if test $ac_cv_func_strchrnul = no; then
|
||||
HAVE_STRCHRNUL=0
|
||||
else
|
||||
AC_CACHE_CHECK([whether strchrnul works],
|
||||
[gl_cv_func_strchrnul_works],
|
||||
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
|
||||
#include <string.h> /* for strchrnul */
|
||||
]], [[const char *buf = "a";
|
||||
return strchrnul (buf, 'b') != buf + 1;
|
||||
]])],
|
||||
[gl_cv_func_strchrnul_works=yes],
|
||||
[gl_cv_func_strchrnul_works=no],
|
||||
[dnl Cygwin 1.7.9 introduced strchrnul, but it was broken until 1.7.10
|
||||
AC_EGREP_CPP([Lucky user],
|
||||
[
|
||||
#if defined __CYGWIN__
|
||||
#include <cygwin/version.h>
|
||||
#if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 9)
|
||||
Lucky user
|
||||
#endif
|
||||
#else
|
||||
Lucky user
|
||||
#endif
|
||||
],
|
||||
[gl_cv_func_strchrnul_works="guessing yes"],
|
||||
[gl_cv_func_strchrnul_works="guessing no"])
|
||||
])
|
||||
])
|
||||
case "$gl_cv_func_strchrnul_works" in
|
||||
*yes) ;;
|
||||
*) REPLACE_STRCHRNUL=1 ;;
|
||||
esac
|
||||
fi
|
||||
])
|
||||
|
||||
# Prerequisites of lib/strchrnul.c.
|
||||
AC_DEFUN([gl_PREREQ_STRCHRNUL], [:])
|
||||
|
|
@ -0,0 +1,136 @@
|
|||
/* Searching in a string.
|
||||
Copyright (C) 2008-2015 Free Software Foundation, Inc.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <config.h>
|
||||
|
||||
/* Specification. */
|
||||
#include <string.h>
|
||||
|
||||
/* Find the first occurrence of C in S. */
|
||||
void *
|
||||
rawmemchr (const void *s, int c_in)
|
||||
{
|
||||
/* On 32-bit hardware, choosing longword to be a 32-bit unsigned
|
||||
long instead of a 64-bit uintmax_t tends to give better
|
||||
performance. On 64-bit hardware, unsigned long is generally 64
|
||||
bits already. Change this typedef to experiment with
|
||||
performance. */
|
||||
typedef unsigned long int longword;
|
||||
|
||||
const unsigned char *char_ptr;
|
||||
const longword *longword_ptr;
|
||||
longword repeated_one;
|
||||
longword repeated_c;
|
||||
unsigned char c;
|
||||
|
||||
c = (unsigned char) c_in;
|
||||
|
||||
/* Handle the first few bytes by reading one byte at a time.
|
||||
Do this until CHAR_PTR is aligned on a longword boundary. */
|
||||
for (char_ptr = (const unsigned char *) s;
|
||||
(size_t) char_ptr % sizeof (longword) != 0;
|
||||
++char_ptr)
|
||||
if (*char_ptr == c)
|
||||
return (void *) char_ptr;
|
||||
|
||||
longword_ptr = (const longword *) char_ptr;
|
||||
|
||||
/* All these elucidatory comments refer to 4-byte longwords,
|
||||
but the theory applies equally well to any size longwords. */
|
||||
|
||||
/* Compute auxiliary longword values:
|
||||
repeated_one is a value which has a 1 in every byte.
|
||||
repeated_c has c in every byte. */
|
||||
repeated_one = 0x01010101;
|
||||
repeated_c = c | (c << 8);
|
||||
repeated_c |= repeated_c << 16;
|
||||
if (0xffffffffU < (longword) -1)
|
||||
{
|
||||
repeated_one |= repeated_one << 31 << 1;
|
||||
repeated_c |= repeated_c << 31 << 1;
|
||||
if (8 < sizeof (longword))
|
||||
{
|
||||
size_t i;
|
||||
|
||||
for (i = 64; i < sizeof (longword) * 8; i *= 2)
|
||||
{
|
||||
repeated_one |= repeated_one << i;
|
||||
repeated_c |= repeated_c << i;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Instead of the traditional loop which tests each byte, we will
|
||||
test a longword at a time. The tricky part is testing if *any of
|
||||
the four* bytes in the longword in question are equal to NUL or
|
||||
c. We first use an xor with repeated_c. This reduces the task
|
||||
to testing whether *any of the four* bytes in longword1 is zero.
|
||||
|
||||
We compute tmp =
|
||||
((longword1 - repeated_one) & ~longword1) & (repeated_one << 7).
|
||||
That is, we perform the following operations:
|
||||
1. Subtract repeated_one.
|
||||
2. & ~longword1.
|
||||
3. & a mask consisting of 0x80 in every byte.
|
||||
Consider what happens in each byte:
|
||||
- If a byte of longword1 is zero, step 1 and 2 transform it into 0xff,
|
||||
and step 3 transforms it into 0x80. A carry can also be propagated
|
||||
to more significant bytes.
|
||||
- If a byte of longword1 is nonzero, let its lowest 1 bit be at
|
||||
position k (0 <= k <= 7); so the lowest k bits are 0. After step 1,
|
||||
the byte ends in a single bit of value 0 and k bits of value 1.
|
||||
After step 2, the result is just k bits of value 1: 2^k - 1. After
|
||||
step 3, the result is 0. And no carry is produced.
|
||||
So, if longword1 has only non-zero bytes, tmp is zero.
|
||||
Whereas if longword1 has a zero byte, call j the position of the least
|
||||
significant zero byte. Then the result has a zero at positions 0, ...,
|
||||
j-1 and a 0x80 at position j. We cannot predict the result at the more
|
||||
significant bytes (positions j+1..3), but it does not matter since we
|
||||
already have a non-zero bit at position 8*j+7.
|
||||
|
||||
The test whether any byte in longword1 is zero is equivalent
|
||||
to testing whether tmp is nonzero.
|
||||
|
||||
This test can read beyond the end of a string, depending on where
|
||||
C_IN is encountered. However, this is considered safe since the
|
||||
initialization phase ensured that the read will be aligned,
|
||||
therefore, the read will not cross page boundaries and will not
|
||||
cause a fault. */
|
||||
|
||||
while (1)
|
||||
{
|
||||
longword longword1 = *longword_ptr ^ repeated_c;
|
||||
|
||||
if ((((longword1 - repeated_one) & ~longword1)
|
||||
& (repeated_one << 7)) != 0)
|
||||
break;
|
||||
longword_ptr++;
|
||||
}
|
||||
|
||||
char_ptr = (const unsigned char *) longword_ptr;
|
||||
|
||||
/* At this point, we know that one of the sizeof (longword) bytes
|
||||
starting at char_ptr is == c. On little-endian machines, we
|
||||
could determine the first such byte without any further memory
|
||||
accesses, just by looking at the tmp result from the last loop
|
||||
iteration. But this does not work on big-endian machines.
|
||||
Choose code that works in both cases. */
|
||||
|
||||
char_ptr = (unsigned char *) longword_ptr;
|
||||
while (*char_ptr != c)
|
||||
char_ptr++;
|
||||
return (void *) char_ptr;
|
||||
}
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
# Suppress a valgrind message about use of uninitialized memory in rawmemchr().
|
||||
# This use is OK because it provides only a speedup.
|
||||
{
|
||||
rawmemchr-value4
|
||||
Memcheck:Value4
|
||||
fun:rawmemchr
|
||||
}
|
||||
{
|
||||
rawmemchr-value8
|
||||
Memcheck:Value8
|
||||
fun:rawmemchr
|
||||
}
|
||||
|
|
@ -0,0 +1,142 @@
|
|||
/* Searching in a string.
|
||||
Copyright (C) 2003, 2007-2015 Free Software Foundation, Inc.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <config.h>
|
||||
|
||||
/* Specification. */
|
||||
#include <string.h>
|
||||
|
||||
/* Find the first occurrence of C in S or the final NUL byte. */
|
||||
char *
|
||||
strchrnul (const char *s, int c_in)
|
||||
{
|
||||
/* On 32-bit hardware, choosing longword to be a 32-bit unsigned
|
||||
long instead of a 64-bit uintmax_t tends to give better
|
||||
performance. On 64-bit hardware, unsigned long is generally 64
|
||||
bits already. Change this typedef to experiment with
|
||||
performance. */
|
||||
typedef unsigned long int longword;
|
||||
|
||||
const unsigned char *char_ptr;
|
||||
const longword *longword_ptr;
|
||||
longword repeated_one;
|
||||
longword repeated_c;
|
||||
unsigned char c;
|
||||
|
||||
c = (unsigned char) c_in;
|
||||
if (!c)
|
||||
return rawmemchr (s, 0);
|
||||
|
||||
/* Handle the first few bytes by reading one byte at a time.
|
||||
Do this until CHAR_PTR is aligned on a longword boundary. */
|
||||
for (char_ptr = (const unsigned char *) s;
|
||||
(size_t) char_ptr % sizeof (longword) != 0;
|
||||
++char_ptr)
|
||||
if (!*char_ptr || *char_ptr == c)
|
||||
return (char *) char_ptr;
|
||||
|
||||
longword_ptr = (const longword *) char_ptr;
|
||||
|
||||
/* All these elucidatory comments refer to 4-byte longwords,
|
||||
but the theory applies equally well to any size longwords. */
|
||||
|
||||
/* Compute auxiliary longword values:
|
||||
repeated_one is a value which has a 1 in every byte.
|
||||
repeated_c has c in every byte. */
|
||||
repeated_one = 0x01010101;
|
||||
repeated_c = c | (c << 8);
|
||||
repeated_c |= repeated_c << 16;
|
||||
if (0xffffffffU < (longword) -1)
|
||||
{
|
||||
repeated_one |= repeated_one << 31 << 1;
|
||||
repeated_c |= repeated_c << 31 << 1;
|
||||
if (8 < sizeof (longword))
|
||||
{
|
||||
size_t i;
|
||||
|
||||
for (i = 64; i < sizeof (longword) * 8; i *= 2)
|
||||
{
|
||||
repeated_one |= repeated_one << i;
|
||||
repeated_c |= repeated_c << i;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Instead of the traditional loop which tests each byte, we will
|
||||
test a longword at a time. The tricky part is testing if *any of
|
||||
the four* bytes in the longword in question are equal to NUL or
|
||||
c. We first use an xor with repeated_c. This reduces the task
|
||||
to testing whether *any of the four* bytes in longword1 or
|
||||
longword2 is zero.
|
||||
|
||||
Let's consider longword1. We compute tmp =
|
||||
((longword1 - repeated_one) & ~longword1) & (repeated_one << 7).
|
||||
That is, we perform the following operations:
|
||||
1. Subtract repeated_one.
|
||||
2. & ~longword1.
|
||||
3. & a mask consisting of 0x80 in every byte.
|
||||
Consider what happens in each byte:
|
||||
- If a byte of longword1 is zero, step 1 and 2 transform it into 0xff,
|
||||
and step 3 transforms it into 0x80. A carry can also be propagated
|
||||
to more significant bytes.
|
||||
- If a byte of longword1 is nonzero, let its lowest 1 bit be at
|
||||
position k (0 <= k <= 7); so the lowest k bits are 0. After step 1,
|
||||
the byte ends in a single bit of value 0 and k bits of value 1.
|
||||
After step 2, the result is just k bits of value 1: 2^k - 1. After
|
||||
step 3, the result is 0. And no carry is produced.
|
||||
So, if longword1 has only non-zero bytes, tmp is zero.
|
||||
Whereas if longword1 has a zero byte, call j the position of the least
|
||||
significant zero byte. Then the result has a zero at positions 0, ...,
|
||||
j-1 and a 0x80 at position j. We cannot predict the result at the more
|
||||
significant bytes (positions j+1..3), but it does not matter since we
|
||||
already have a non-zero bit at position 8*j+7.
|
||||
|
||||
The test whether any byte in longword1 or longword2 is zero is equivalent
|
||||
to testing whether tmp1 is nonzero or tmp2 is nonzero. We can combine
|
||||
this into a single test, whether (tmp1 | tmp2) is nonzero.
|
||||
|
||||
This test can read more than one byte beyond the end of a string,
|
||||
depending on where the terminating NUL is encountered. However,
|
||||
this is considered safe since the initialization phase ensured
|
||||
that the read will be aligned, therefore, the read will not cross
|
||||
page boundaries and will not cause a fault. */
|
||||
|
||||
while (1)
|
||||
{
|
||||
longword longword1 = *longword_ptr ^ repeated_c;
|
||||
longword longword2 = *longword_ptr;
|
||||
|
||||
if (((((longword1 - repeated_one) & ~longword1)
|
||||
| ((longword2 - repeated_one) & ~longword2))
|
||||
& (repeated_one << 7)) != 0)
|
||||
break;
|
||||
longword_ptr++;
|
||||
}
|
||||
|
||||
char_ptr = (const unsigned char *) longword_ptr;
|
||||
|
||||
/* At this point, we know that one of the sizeof (longword) bytes
|
||||
starting at char_ptr is == 0 or == c. On little-endian machines,
|
||||
we could determine the first such byte without any further memory
|
||||
accesses, just by looking at the tmp result from the last loop
|
||||
iteration. But this does not work on big-endian machines.
|
||||
Choose code that works in both cases. */
|
||||
|
||||
char_ptr = (unsigned char *) longword_ptr;
|
||||
while (*char_ptr && (*char_ptr != c))
|
||||
char_ptr++;
|
||||
return (char *) char_ptr;
|
||||
}
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
# Suppress a valgrind message about use of uninitialized memory in strchrnul().
|
||||
# This use is OK because it provides only a speedup.
|
||||
{
|
||||
strchrnul-value4
|
||||
Memcheck:Value4
|
||||
fun:strchrnul
|
||||
}
|
||||
{
|
||||
strchrnul-value8
|
||||
Memcheck:Value8
|
||||
fun:strchrnul
|
||||
}
|
||||
|
|
@ -45,6 +45,7 @@ IMPORTED_GNULIB_MODULES="\
|
|||
readlink \
|
||||
rename \
|
||||
signal-h \
|
||||
strchrnul \
|
||||
strstr \
|
||||
strtok_r \
|
||||
sys_stat \
|
||||
|
|
|
|||
26
gdb/remote.c
26
gdb/remote.c
|
|
@ -6387,16 +6387,6 @@ peek_stop_reply (ptid_t ptid)
|
|||
stop_reply_match_ptid_and_ws, &ptid);
|
||||
}
|
||||
|
||||
/* Skip PACKET until the next semi-colon (or end of string). */
|
||||
|
||||
static char *
|
||||
skip_to_semicolon (char *p)
|
||||
{
|
||||
while (*p != '\0' && *p != ';')
|
||||
p++;
|
||||
return p;
|
||||
}
|
||||
|
||||
/* Helper for remote_parse_stop_reply. Return nonzero if the substring
|
||||
starting with P and ending with PEND matches PREFIX. */
|
||||
|
||||
|
|
@ -6499,7 +6489,7 @@ Packet: '%s'\n"),
|
|||
/* The value part is documented as "must be empty",
|
||||
though we ignore it, in case we ever decide to make
|
||||
use of it in a backward compatible way. */
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
}
|
||||
else if (strprefix (p, p1, "hwbreak"))
|
||||
{
|
||||
|
|
@ -6511,19 +6501,19 @@ Packet: '%s'\n"),
|
|||
error (_("Unexpected hwbreak stop reason"));
|
||||
|
||||
/* See above. */
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
}
|
||||
else if (strprefix (p, p1, "library"))
|
||||
{
|
||||
event->ws.kind = TARGET_WAITKIND_LOADED;
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
}
|
||||
else if (strprefix (p, p1, "replaylog"))
|
||||
{
|
||||
event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
|
||||
/* p1 will indicate "begin" or "end", but it makes
|
||||
no difference for now, so ignore it. */
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
}
|
||||
else if (strprefix (p, p1, "core"))
|
||||
{
|
||||
|
|
@ -6545,7 +6535,7 @@ Packet: '%s'\n"),
|
|||
else if (strprefix (p, p1, "vforkdone"))
|
||||
{
|
||||
event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
}
|
||||
else if (strprefix (p, p1, "exec"))
|
||||
{
|
||||
|
|
@ -6574,7 +6564,7 @@ Packet: '%s'\n"),
|
|||
else if (strprefix (p, p1, "create"))
|
||||
{
|
||||
event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
}
|
||||
else
|
||||
{
|
||||
|
|
@ -6583,7 +6573,7 @@ Packet: '%s'\n"),
|
|||
|
||||
if (skipregs)
|
||||
{
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
p++;
|
||||
continue;
|
||||
}
|
||||
|
|
@ -6620,7 +6610,7 @@ Packet: '%s'\n"),
|
|||
{
|
||||
/* Not a number. Silently skip unknown optional
|
||||
info. */
|
||||
p = skip_to_semicolon (p1 + 1);
|
||||
p = strchrnul (p1 + 1, ';');
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue