diff options
Diffstat (limited to 'gl/m4/regex.m4')
| -rw-r--r-- | gl/m4/regex.m4 | 275 |
1 files changed, 142 insertions, 133 deletions
diff --git a/gl/m4/regex.m4 b/gl/m4/regex.m4 index aef53d29..95784e4b 100644 --- a/gl/m4/regex.m4 +++ b/gl/m4/regex.m4 @@ -1,7 +1,7 @@ -# serial 54 +# serial 56 -# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, -# 2006, 2007, 2008, 2009 Free Software Foundation, Inc. +# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, +# 2007, 2008, 2009, 2010 Free Software Foundation, Inc. # # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, @@ -18,146 +18,154 @@ AC_DEFUN([gl_REGEX], AC_ARG_WITH([included-regex], [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).])]) + [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. 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[ - #if HAVE_LOCALE_H - #include <locale.h> - #endif - #include <limits.h> - #include <regex.h> - ]], - [[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 <stolfi@ic.unicamp.br>. */ - 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;]])], + [AC_LANG_PROGRAM( + [AC_INCLUDES_DEFAULT[ + #if HAVE_LOCALE_H + #include <locale.h> + #endif + #include <limits.h> + #include <regex.h> + ]], + [[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; + + /* Ensure that [b-a] is diagnosed as invalid, when + using RE_NO_EMPTY_RANGES. */ + re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("a[b-a]", 6, ®ex); + if (s == 0) + 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 <stolfi@ic.unicamp.br>. */ + 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. @@ -213,6 +221,7 @@ AC_DEFUN([gl_REGEX], AC_DEFUN([gl_PREREQ_REGEX], [ 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]) |