X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fregex.m4;h=b8d5b1ed11126903430d84e893f260754e8daa40;hb=e062ed7a99ca4e88a93db19362800a3326a462ea;hp=69dc326f7499e5465dba8d0f94e3a2dda1a8fb72;hpb=331f6ee713f7038d6d1a1c0451016c8aaab6a079;p=gnulib.git

diff --git a/m4/regex.m4 b/m4/regex.m4
index 69dc326f7..b8d5b1ed1 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,7 +1,7 @@
-#serial 40
+#serial 46
 
 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
-# 2006 Free Software Foundation, Inc.
+# 2006, 2007 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -18,9 +18,12 @@ AC_DEFUN([gl_REGEX],
 
   AC_ARG_WITH([included-regex],
     [AC_HELP_STRING([--without-included-regex],
-		    [don't compile regex; this is the default on
+		    [don't compile regex; this is the default on 32-bit
 		     systems with recent-enough versions of the GNU C
-		     Library (use with caution on other systems)])])
+		     Library (use with caution on other systems).
+		     On systems with 64-bit ptrdiff_t and 32-bit int,
+		     --with-included-regex is the default, in case
+		     regex functions operate on very long strings (>2GB)])])
 
   case $with_included_regex in #(
   yes|no) ac_use_included_regex=$with_included_regex
@@ -29,8 +32,7 @@ AC_DEFUN([gl_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],
       [AC_RUN_IFELSE(
@@ -74,68 +76,80 @@ AC_DEFUN([gl_REGEX],
 		}
 	    #endif
 
+	    /* This test is from glibc bug 3957, reported by Andrew Mackey.  */
+	    re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
+	    memset (&regex, 0, sizeof regex);
+	    s = re_compile_pattern ("a[^x]b", 6, &regex);
+	    if (s)
+	      return 1;
+
+	    /* This should fail, but succeeds for glibc-2.5.  */
+	    if (re_search (&regex, "a\nb", 3, 0, 3, &regs) != -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 (&regex, 0, sizeof (regex));
+	    memset (&regex, 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, &regex);
 	    /* This should fail with _Invalid character class name_ error.  */
 	    if (!s)
-	      exit (1);
+	      return 1;
 
-	    /* This should succeed, but does not for e.g. glibc-2.1.3.  */
-	    memset (&regex, 0, sizeof (regex));
+	    /* This should succeed, but does not for glibc-2.1.3.  */
+	    memset (&regex, 0, sizeof regex);
 	    s = re_compile_pattern ("{1", 2, &regex);
 
 	    if (s)
-	      exit (1);
+	      return 1;
 
 	    /* The following example is derived from a problem report
 	       against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
-	    memset (&regex, 0, sizeof (regex));
+	    memset (&regex, 0, sizeof regex);
 	    s = re_compile_pattern ("[an\371]*n", 7, &regex);
 	    if (s)
-	      exit (1);
+	      return 1;
 
-	    /* This should match, but does not for e.g. glibc-2.2.1.  */
+	    /* This should match, but does not for glibc-2.2.1.  */
 	    if (re_match (&regex, "an", 2, 0, &regs) != 2)
-	      exit (1);
+	      return 1;
 
-	    memset (&regex, 0, sizeof (regex));
+	    memset (&regex, 0, sizeof regex);
 	    s = re_compile_pattern ("x", 1, &regex);
 	    if (s)
-	      exit (1);
+	      return 1;
 
-	    /* The version of regex.c in e.g. GNU libc-2.2.93 did not
-	       work with a negative RANGE argument.  */
+	    /* glibc-2.2.93 does not work with a negative RANGE argument.  */
 	    if (re_search (&regex, "wxy", 3, 2, -2, &regs) != 1)
-	      exit (1);
+	      return 1;
 
 	    /* The version of regex.c in older versions of gnulib
 	       ignored RE_ICASE.  Detect that problem too.  */
-	    memset (&regex, 0, sizeof (regex));
 	    re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
+	    memset (&regex, 0, sizeof regex);
 	    s = re_compile_pattern ("x", 1, &regex);
 	    if (s)
-	      exit (1);
+	      return 1;
 
 	    if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 0)
-	      exit (1);
+	      return 1;
 
 	    /* REG_STARTEND was added to glibc on 2004-01-15.
 	       Reject older versions.  */
 	    if (! REG_STARTEND)
-	      exit (1);
+	      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))
-	      exit (1);
+	      return 1;
 
-	    exit (0);]])],
+	    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.
@@ -192,8 +206,6 @@ AC_DEFUN([gl_PREREQ_REGEX],
 [
   AC_REQUIRE([AC_GNU_SOURCE])
   AC_REQUIRE([AC_C_RESTRICT])
-  AC_REQUIRE([AM_LANGINFO_CODESET])
-  AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
-  AC_CHECK_FUNCS_ONCE([mbrtowc mempcpy wcrtomb wcscoll])
+  AC_CHECK_FUNCS_ONCE([iswctype mbrtowc wcrtomb wcscoll])
   AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])
 ])