X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fregex.m4;h=4e24b84c52c0a636f220910a4ebbc04f265d0fcc;hb=9072c434ac94ee3e8352aba6c48de06bc62dfd50;hp=cd713660ef11859f6786f5b9ec9a5b0cff5823ea;hpb=4392fa65c8d8dce126bf6b404758a4727821c595;p=gnulib.git diff --git a/m4/regex.m4 b/m4/regex.m4 index cd713660e..4e24b84c5 100644 --- a/m4/regex.m4 +++ b/m4/regex.m4 @@ -1,7 +1,7 @@ -#serial 37 +# serial 55 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, -# 2006 Free Software Foundation, Inc. +# 2006, 2007, 2008, 2009 Free Software Foundation, Inc. # # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, @@ -14,100 +14,150 @@ AC_PREREQ([2.50]) AC_DEFUN([gl_REGEX], [ - AC_LIBSOURCES( - [regcomp.c, regex.c, regex.h, - regex_internal.c, regex_internal.h, regexec.c]) + AC_CHECK_HEADERS_ONCE([locale.h]) AC_ARG_WITH([included-regex], - [AC_HELP_STRING([--without-included-regex], - [don't compile regex; this is the default on - systems with recent-enough versions of the GNU C - Library (use with caution on other systems)])]) + [AS_HELP_STRING([--without-included-regex], + [don't compile regex; this is the default on systems + with recent-enough versions of the GNU C Library + (use with caution on other systems).])]) case $with_included_regex in #( yes|no) ac_use_included_regex=$with_included_regex - ;; + ;; '') # If the system regex support is good enough that it passes the # following run test, then default to *not* using the included regex.c. # If cross compiling, assume the test would fail and use the included - # regex.c. The first failing regular expression is from `Spencer ere - # test #75' in grep-2.3. + # regex.c. AC_CACHE_CHECK([for working re_compile_pattern], - [gl_cv_func_re_compile_pattern_working], + [gl_cv_func_re_compile_pattern_working], [AC_RUN_IFELSE( - [AC_LANG_PROGRAM( - [AC_INCLUDES_DEFAULT - #include - #include - ], - [[static struct re_pattern_buffer regex; - unsigned char folded_chars[UCHAR_MAX + 1]; - int i; - const char *s; - struct re_registers regs; - re_set_syntax (RE_SYNTAX_POSIX_EGREP); - memset (®ex, 0, sizeof (regex)); - for (i = 0; i <= UCHAR_MAX; i++) - folded_chars[i] = i; - regex.translate = folded_chars; - s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex); - /* This should fail with _Invalid character class name_ error. */ - if (!s) - exit (1); - - /* This should succeed, but does not for e.g. glibc-2.1.3. */ - memset (®ex, 0, sizeof (regex)); - s = re_compile_pattern ("{1", 2, ®ex); - - if (s) - exit (1); - - /* The following example is derived from a problem report - against gawk from Jorge Stolfi . */ - memset (®ex, 0, sizeof (regex)); - s = re_compile_pattern ("[an\371]*n", 7, ®ex); - if (s) - exit (1); - - /* This should match, but does not for e.g. glibc-2.2.1. */ - if (re_match (®ex, "an", 2, 0, ®s) != 2) - exit (1); - - memset (®ex, 0, sizeof (regex)); - s = re_compile_pattern ("x", 1, ®ex); - if (s) - exit (1); - - /* The version of regex.c in e.g. GNU libc-2.2.93 did not - work with a negative RANGE argument. */ - if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1) - exit (1); - - /* The version of regex.c in older versions of gnulib - ignored RE_ICASE. Detect that problem too. */ - memset (®ex, 0, sizeof (regex)); - re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE); - s = re_compile_pattern ("x", 1, ®ex); - if (s) - exit (1); - - if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0) - exit (1); - - /* REG_STARTEND was added to glibc on 2004-01-15. - Reject older versions. */ - if (! REG_STARTEND) - exit (1); - - /* Reject hosts whose regoff_t values are too narrow. - These include glibc 2.3.5 on hosts with 64-bit ptrdiff_t - and 32-bit int. */ - if (sizeof (regoff_t) < sizeof (ptrdiff_t) - || sizeof (regoff_t) < sizeof (ssize_t)) - exit (1); - - exit (0);]])], + [AC_LANG_PROGRAM( + [AC_INCLUDES_DEFAULT[ + #if HAVE_LOCALE_H + #include + #endif + #include + #include + ]], + [[static struct re_pattern_buffer regex; + unsigned char folded_chars[UCHAR_MAX + 1]; + int i; + const char *s; + struct re_registers regs; + + #if HAVE_LOCALE_H + /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html + This test needs valgrind to catch the bug on Debian + GNU/Linux 3.1 x86, but it might catch the bug better + on other platforms and it shouldn't hurt to try the + test here. */ + if (setlocale (LC_ALL, "en_US.UTF-8")) + { + static char const pat[] = "insert into"; + static char const data[] = + "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK"; + re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE + | RE_ICASE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + return 1; + if (re_search (®ex, data, sizeof data - 1, + 0, sizeof data - 1, ®s) + != -1) + return 1; + if (! setlocale (LC_ALL, "C")) + return 1; + } + #endif + + /* This test is from glibc bug 3957, reported by Andrew Mackey. */ + re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("a[^x]b", 6, ®ex); + if (s) + return 1; + + /* This should fail, but succeeds for glibc-2.5. */ + if (re_search (®ex, "a\nb", 3, 0, 3, ®s) != -1) + return 1; + + /* This regular expression is from Spencer ere test number 75 + in grep-2.3. */ + re_set_syntax (RE_SYNTAX_POSIX_EGREP); + memset (®ex, 0, sizeof regex); + for (i = 0; i <= UCHAR_MAX; i++) + folded_chars[i] = i; + regex.translate = folded_chars; + s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex); + /* This should fail with _Invalid character class name_ error. */ + if (!s) + return 1; + + /* This should succeed, but does not for glibc-2.1.3. */ + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("{1", 2, ®ex); + + if (s) + return 1; + + /* The following example is derived from a problem report + against gawk from Jorge Stolfi . */ + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("[an\371]*n", 7, ®ex); + if (s) + return 1; + + /* This should match, but does not for glibc-2.2.1. */ + if (re_match (®ex, "an", 2, 0, ®s) != 2) + return 1; + + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("x", 1, ®ex); + if (s) + return 1; + + /* glibc-2.2.93 does not work with a negative RANGE argument. */ + if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1) + return 1; + + /* The version of regex.c in older versions of gnulib + ignored RE_ICASE. Detect that problem too. */ + re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("x", 1, ®ex); + if (s) + return 1; + + if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0) + return 1; + + /* Catch a bug reported by Vin Shelton in + http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html + */ + re_set_syntax (RE_SYNTAX_POSIX_BASIC + & ~RE_CONTEXT_INVALID_DUP + & ~RE_NO_EMPTY_RANGES); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, ®ex); + if (s) + return 1; + + /* REG_STARTEND was added to glibc on 2004-01-15. + Reject older versions. */ + if (! REG_STARTEND) + return 1; + + /* Reject hosts whose regoff_t values are too narrow. + These include glibc 2.3.5 on hosts with 64-bit ptrdiff_t + and 32-bit int. */ + if (sizeof (regoff_t) < sizeof (ptrdiff_t) + || sizeof (regoff_t) < sizeof (ssize_t)) + return 1; + + return 0;]])], [gl_cv_func_re_compile_pattern_working=yes], [gl_cv_func_re_compile_pattern_working=no], dnl When crosscompiling, assume it is not working. @@ -122,7 +172,7 @@ AC_DEFUN([gl_REGEX], esac if test $ac_use_included_regex = yes; then - AC_DEFINE([_REGEX_LARGE_OFFSETS], 1, + AC_DEFINE([_REGEX_LARGE_OFFSETS], [1], [Define if you want regoff_t to be at least as wide POSIX requires.]) AC_DEFINE([re_syntax_options], [rpl_re_syntax_options], [Define to rpl_re_syntax_options if the replacement should be used.]) @@ -162,10 +212,11 @@ AC_DEFUN([gl_REGEX], # Prerequisites of lib/regex.c and lib/regex_internal.c. AC_DEFUN([gl_PREREQ_REGEX], [ - AC_REQUIRE([AC_GNU_SOURCE]) - AC_REQUIRE([gl_C_RESTRICT]) - AC_REQUIRE([AM_LANGINFO_CODESET]) - AC_CHECK_HEADERS_ONCE([locale.h wchar.h wctype.h]) - AC_CHECK_FUNCS_ONCE([mbrtowc mempcpy wcrtomb wcscoll]) + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + AC_REQUIRE([AC_C_INLINE]) + AC_REQUIRE([AC_C_RESTRICT]) + AC_REQUIRE([AC_TYPE_MBSTATE_T]) + AC_CHECK_HEADERS([libintl.h]) + AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll]) AC_CHECK_DECLS([isblank], [], [], [#include ]) ])