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S:4.9.0.32.5420-alt1
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4.1: 4.1.5-alt2
4.0: 4.1.5-alt2
3.0: 4.1.4-alt2

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Patch: sed-4.1.5-up-utf8.patch
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* looking for bonzini@gnu.org--2004b/sed--stable--4.1--patch-69 to compare with
* comparing to bonzini@gnu.org--2004b/sed--stable--4.1--patch-69
M  sed/mbcs.c
M  sed/sed.h
M  sed/execute.c
* modified files
--- orig/sed/execute.c
+++ mod/sed/execute.c
@@ -235,25 +235,26 @@ str_append(to, string, length)
   to->length = new_length;
 
 #ifdef HAVE_MBRTOWC
-  if (mb_cur_max == 1)
-    return;
-
-  while (length)
-    {
-      int n = MBRLEN (string, length, &to->mbstate);
+  if (mb_cur_max > 1 && !is_utf8)
+    while (length)
+      {
+        size_t n = MBRLEN (string, length, &to->mbstate);
 
-      /* An invalid sequence is treated like a singlebyte character. */
-      if (n == -1)
-	{
-	  memset (&to->mbstate, 0, sizeof (to->mbstate));
-	  n = 1;
-	}
+        /* An invalid sequence is treated like a singlebyte character. */
+        if (n == (size_t) -1)
+	  {
+	    memset (&to->mbstate, 0, sizeof (to->mbstate));
+	    n = 1;
+	  }
 
-      if (n > 0)
-	length -= n;
-      else
-	break;
-    }
+        if (n > 0)
+	  {
+	    string += n;
+	    length -= n;
+	  }
+        else
+	  break;
+      }
 #endif
 }
 
--- orig/sed/mbcs.c
+++ mod/sed/mbcs.c
@@ -18,7 +18,12 @@
 #include "sed.h"
 #include <stdlib.h>
 
+#ifdef HAVE_LANGINFO_CODESET
+#include <langinfo.h>
+#endif
+
 int mb_cur_max;
+bool is_utf8;
 
 #ifdef HAVE_MBRTOWC
 /* Add a byte to the multibyte character represented by the state
@@ -47,6 +52,26 @@ int brlen (ch, cur_stat)
 void
 initialize_mbcs ()
 {
+  /* For UTF-8, we know that the encoding is stateless.  */
+  const char *codeset_name;
+
+#ifdef HAVE_LANGINFO_CODESET
+  codeset_name = nl_langinfo (CODESET);
+#else
+  codeset_name = getenv ("LC_ALL");
+  if (codeset_name == NULL || codeset_name[0] == '\0')
+    codeset_name = getenv ("LC_CTYPE");
+  if (codeset_name == NULL || codeset_name[0] == '\0')
+    codeset_name = getenv ("LANG");
+  if (codeset_name == NULL)
+    codeset_name = "";
+  else if (strchr (codeset_name, '.') !=  NULL)
+    codeset_name = strchr (codeset_name, '.') + 1;
+#endif
+
+  is_utf8 = (strcasecmp (codeset_name, "UTF-8") == 0
+	     || strcasecmp (codeset_name, "UTF8") == 0);
+
 #ifdef HAVE_MBRTOWC
   mb_cur_max = MB_CUR_MAX;
 #else
--- orig/sed/sed.h
+++ mod/sed/sed.h
@@ -233,6 +233,7 @@ extern bool use_extended_syntax_p;
 
 /* Declarations for multibyte character sets.  */
 extern int mb_cur_max;
+extern bool is_utf8;
 
 #ifdef HAVE_MBRTOWC
 #ifdef HAVE_BTOWC
 
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current maintainer: Michael Shigorin