Use coreutils' regexp libraries, so regexp always available now

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1403 f882894a-f735-0410-b71e-b25c423dba1c

4 files changed, 227 insertions, 0 deletions

diff --git a/m4/.cvsignore b/m4/.cvsignore
index 282522db..a324157c 100644
--- a/m4/.cvsignore
+++ b/m4/.cvsignore
@@ -1,2 +1,3 @@
 Makefile
 Makefile.in
+Makefile.am
diff --git a/m4/np_coreutils.m4 b/m4/np_coreutils.m4
index e6627a2b..44aa3b80 100644
--- a/m4/np_coreutils.m4
+++ b/m4/np_coreutils.m4
@@ -18,4 +18,5 @@ AC_DEFUN([np_COREUTILS],
   AC_REQUIRE([gl_MOUNTLIST])
   AC_REQUIRE([gl_FSUSAGE])
   AC_REQUIRE([gl_FUNC_GLIBC_UNLOCKED_IO])
+  AC_REQUIRE([gl_REGEX])
 ])
diff --git a/m4/regex.m4 b/m4/regex.m4
new file mode 100644
index 00000000..8ea4fe94
--- /dev/null
+++ b/m4/regex.m4
@@ -0,0 +1,187 @@
+#serial 31
+
+# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005 Free
+# Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+dnl Initially derived from code in GNU grep.
+dnl Mostly written by Jim Meyering.
+
+AC_PREREQ([2.50])
+
+AC_DEFUN([gl_REGEX],
+[
+  AC_REQUIRE([AC_SYS_LARGEFILE]) dnl for a sufficently-wide off_t
+
+  AC_CACHE_CHECK([whether off_t can be used in a switch statement],
+    [gl_cv_type_off_t_switch],
+    [AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM(
+         [AC_INCLUDES_DEFAULT],
+         [[off_t o = -1;
+           switch (o)
+             {
+             case -2:
+               return 1;
+             case -1:
+               return 2;
+             default:
+               return 0;
+             }
+         ]])],
+      [gl_cv_type_off_t_switch=yes],
+      [gl_cv_type_off_t_switch=no])])
+  if test $gl_cv_type_off_t_switch = yes; then
+    AC_DEFINE([_REGEX_LARGE_OFFSETS], 1,
+      [Define if you want regoff_t to be at least as wide POSIX requires.])
+  fi
+
+  AC_LIBSOURCES(
+    [regcomp.c, regex.c, regex.h,
+     regex_internal.c, regex_internal.h, regexec.c])
+
+  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)])])
+
+  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 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.
+    AC_CACHE_CHECK([for working re_compile_pattern],
+                   [gl_cv_func_re_compile_pattern_broken],
+      [AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM(
+          [AC_INCLUDES_DEFAULT
+           #include <regex.h>],
+          [[static struct re_pattern_buffer regex;
+            const char *s;
+            struct re_registers regs;
+            /* Use the POSIX-compliant spelling with leading REG_,
+               rather than the traditional GNU spelling with leading RE_,
+               so that we reject older libc implementations.  */
+            re_set_syntax (REG_SYNTAX_POSIX_EGREP);
+            memset (&regex, 0, sizeof (regex));
+            s = re_compile_pattern ("a[:@:>@:]b\n", 9, &regex);
+            /* 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 (&regex, 0, sizeof (regex));
+            s = re_compile_pattern ("{1", 2, &regex);
+
+            if (s)
+              exit (1);
+
+            /* The following example is derived from a problem report
+               against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
+            memset (&regex, 0, sizeof (regex));
+            s = re_compile_pattern ("[an\371]*n", 7, &regex);
+            if (s)
+              exit (1);
+
+            /* This should match, but does not for e.g. glibc-2.2.1.  */
+            if (re_match (&regex, "an", 2, 0, &regs) != 2)
+              exit (1);
+
+            memset (&regex, 0, sizeof (regex));
+            s = re_compile_pattern ("x", 1, &regex);
+            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 (&regex, "wxy", 3, 2, -2, &regs) != 1)
+              exit (1);
+
+            /* The version of regex.c in older versions of gnulib
+               ignored REG_IGNORE_CASE (which was then called RE_ICASE).
+               Detect that problem too.  */
+            memset (&regex, 0, sizeof (regex));
+            re_set_syntax (REG_SYNTAX_EMACS | REG_IGNORE_CASE);
+            s = re_compile_pattern ("x", 1, &regex);
+            if (s)
+              exit (1);
+
+            if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 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 off_t
+               and 32-bit int, and Solaris 10 on hosts with 32-bit int
+               and _FILE_OFFSET_BITS=64.  */
+            if (sizeof (regoff_t) < sizeof (off_t))
+              exit (1);
+
+            exit (0);]])],
+       [gl_cv_func_re_compile_pattern_broken=no],
+       [gl_cv_func_re_compile_pattern_broken=yes],
+       dnl When crosscompiling, assume it is broken.
+       [gl_cv_func_re_compile_pattern_broken=yes])])
+    ac_use_included_regex=$gl_cv_func_re_compile_pattern_broken
+    ;;
+  *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
+    ;;
+  esac
+
+  if test $ac_use_included_regex = yes; then
+    AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
+      [Define to rpl_re_syntax_options if the replacement should be used.])
+    AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
+      [Define to rpl_re_set_syntax if the replacement should be used.])
+    AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
+      [Define to rpl_re_compile_pattern if the replacement should be used.])
+    AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
+      [Define to rpl_re_compile_fastmap if the replacement should be used.])
+    AC_DEFINE([re_search], [rpl_re_search],
+      [Define to rpl_re_search if the replacement should be used.])
+    AC_DEFINE([re_search_2], [rpl_re_search_2],
+      [Define to rpl_re_search_2 if the replacement should be used.])
+    AC_DEFINE([re_match], [rpl_re_match],
+      [Define to rpl_re_match if the replacement should be used.])
+    AC_DEFINE([re_match_2], [rpl_re_match_2],
+      [Define to rpl_re_match_2 if the replacement should be used.])
+    AC_DEFINE([re_set_registers], [rpl_re_set_registers],
+      [Define to rpl_re_set_registers if the replacement should be used.])
+    AC_DEFINE([re_comp], [rpl_re_comp],
+      [Define to rpl_re_comp if the replacement should be used.])
+    AC_DEFINE([re_exec], [rpl_re_exec],
+      [Define to rpl_re_exec if the replacement should be used.])
+    AC_DEFINE([regcomp], [rpl_regcomp],
+      [Define to rpl_regcomp if the replacement should be used.])
+    AC_DEFINE([regexec], [rpl_regexec],
+      [Define to rpl_regexec if the replacement should be used.])
+    AC_DEFINE([regerror], [rpl_regerror],
+      [Define to rpl_regerror if the replacement should be used.])
+    AC_DEFINE([regfree], [rpl_regfree],
+      [Define to rpl_regfree if the replacement should be used.])
+    AC_LIBOBJ([regex])
+    gl_PREREQ_REGEX
+  fi
+])
+
+# 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([isblank mbrtowc mempcpy wcrtomb wcscoll])
+])
diff --git a/m4/restrict.m4 b/m4/restrict.m4
new file mode 100644
index 00000000..1f3bbb92
--- /dev/null
+++ b/m4/restrict.m4
@@ -0,0 +1,38 @@
+#serial 1003
+dnl Copyright (C) 2003 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.
+
+# This macro can be removed once we can rely on Autoconf 2.57a or later,
+# since we can then use its AC_C_RESTRICT.
+
+# gl_C_RESTRICT
+# --------------
+# Determine whether the C/C++ compiler supports the "restrict" keyword
+# introduced in ANSI C99, or an equivalent.  Do nothing if the compiler
+# accepts it.  Otherwise, if the compiler supports an equivalent,
+# define "restrict" to be that.  Here are some variants:
+# - GCC supports both __restrict and __restrict__
+# - older DEC Alpha C compilers support only __restrict
+# - _Restrict is the only spelling accepted by Sun WorkShop 6 update 2 C
+# Otherwise, define "restrict" to be empty.
+AC_DEFUN([gl_C_RESTRICT],
+[AC_CACHE_CHECK([for C/C++ restrict keyword], gl_cv_c_restrict,
+  [gl_cv_c_restrict=no
+   # Try the official restrict keyword, then gcc's __restrict, and
+   # the less common variants.
+   for ac_kw in restrict __restrict __restrict__ _Restrict; do
+     AC_COMPILE_IFELSE([AC_LANG_SOURCE(
+      [float * $ac_kw x;])],
+      [gl_cv_c_restrict=$ac_kw; break])
+   done
+  ])
+ case $gl_cv_c_restrict in
+   restrict) ;;
+   no) AC_DEFINE(restrict,,
+        [Define to equivalent of C99 restrict keyword, or to nothing if this
+        is not supported.  Do not define if restrict is supported directly.]) ;;
+   *)  AC_DEFINE_UNQUOTED(restrict, $gl_cv_c_restrict) ;;
+ esac
+])