From d4903bb0efac5e399b785c71367d8cda3fb539ab Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 26 Jun 2012 15:16:07 -0700
Subject: [PATCH] regex: use locale-independent comparison for codeset name

See Bruno Haible's comment in <http://bugs.gnu.org/10305#120>.
* lib/regcomp.c (init_dfa): Use just ASCII case comparison
for codeset name.
* lib/regex_internal.h: Do not include <strings.h>, since we
no longer use strcasecmp.
* modules/regex (Depends-on): Remove strcase.
---
 ChangeLog            | 10 ++++++++++
 lib/regcomp.c        |  6 ++++--
 lib/regex_internal.h |  1 -
 modules/regex        |  1 -
 4 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b7e9da957..ceb5a55d6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2012-06-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	regex: use locale-independent comparison for codeset name
+	See Bruno Haible's comment in <http://bugs.gnu.org/10305#120>.
+	* lib/regcomp.c (init_dfa): Use just ASCII case comparison
+	for codeset name.
+	* lib/regex_internal.h: Do not include <strings.h>, since we
+	no longer use strcasecmp.
+	* modules/regex (Depends-on): Remove strcase.
+
 2012-06-23  Bruno Haible  <bruno@clisp.org>
 
 	getopt-posix: No longer guarantee that option processing is resettable.
diff --git a/lib/regcomp.c b/lib/regcomp.c
index 7eb003bfa..6d5525a6f 100644
--- a/lib/regcomp.c
+++ b/lib/regcomp.c
@@ -899,8 +899,10 @@ init_dfa (re_dfa_t *dfa, size_t pat_len)
 		       != 0);
 #else
   codeset_name = nl_langinfo (CODESET);
-  if (strcasecmp (codeset_name, "UTF-8") == 0
-      || strcasecmp (codeset_name, "UTF8") == 0)
+  if ((codeset_name[0] == 'U' || codeset_name[0] == 'u')
+      && (codeset_name[1] == 'T' || codeset_name[1] == 't')
+      && (codeset_name[2] == 'F' || codeset_name[2] == 'f')
+      && strcmp (codeset_name + 3 + (codeset_name[3] == '-'), "8") == 0)
     dfa->is_utf8 = 1;
 
   /* We check exhaustively in the loop below if this charset is a
diff --git a/lib/regex_internal.h b/lib/regex_internal.h
index 64cef470e..2b9f69756 100644
--- a/lib/regex_internal.h
+++ b/lib/regex_internal.h
@@ -24,7 +24,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <strings.h>
 
 #include <langinfo.h>
 #ifndef _LIBC
diff --git a/modules/regex b/modules/regex
index 5371bab30..cfc5d0707 100644
--- a/modules/regex
+++ b/modules/regex
@@ -26,7 +26,6 @@ mbsinit         [test $ac_use_included_regex = yes]
 nl_langinfo     [test $ac_use_included_regex = yes]
 stdbool         [test $ac_use_included_regex = yes]
 stdint          [test $ac_use_included_regex = yes]
-strcase         [test $ac_use_included_regex = yes]
 wchar           [test $ac_use_included_regex = yes]
 wcrtomb         [test $ac_use_included_regex = yes]
 wctype-h        [test $ac_use_included_regex = yes]
-- 
2.11.0