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diff --git a/libxsde/xsde/cxx/iso8859-1.hxx b/libxsde/xsde/cxx/iso8859-1.hxx
new file mode 100644
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+++ b/libxsde/xsde/cxx/iso8859-1.hxx
@@ -0,0 +1,85 @@
+// file      : xsde/cxx/iso8859-1.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2005-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef XSDE_CXX_ISO8859_1_HXX
+#define XSDE_CXX_ISO8859_1_HXX
+
+#include <stddef.h> // size_t
+
+#include <xsde/cxx/config.hxx>
+
+namespace xsde
+{
+  namespace cxx
+  {
+    class iso8859_1
+    {
+    public:
+      // Get/set a replacement for unrepresentable characters. If set to
+      // 0 (the default value), the conversion fails if such a character
+      // is encountered.
+      //
+      static char
+      unrep_char ()
+      {
+        return unrep_char_;
+      }
+
+      static void
+      unrep_char (char c)
+      {
+        unrep_char_ = c;
+      }
+
+    public:
+      // Test whether a UTF-8 string is an ASCII string. If these
+      // functions return false, the iso_size argument contains
+      // the size of the buffer needed to convert this string to
+      // ISO-8859-1.
+      //
+      static bool
+      ascii_utf (const char* utf_str, size_t& iso_size);
+
+      static bool
+      ascii_utf (const char* utf_str, size_t utf_size, size_t& iso_size);
+
+      // Test whether an ISO-8859-1 string is an ASCII string. If
+      // these functions return false, the utf_size argument contains
+      // the size of the buffer needed to convert this string to UTF-8.
+      //
+      static bool
+      ascii_iso (const char* iso_str, size_t& utf_size);
+
+      static bool
+      ascii_iso (const char* iso_str, size_t iso_size, size_t& utf_size);
+
+      // Convert from UTF-8 to ISO-8859-1. Return false if an
+      // unrepresentable character was encountered and no replacement
+      // was specified.
+      //
+      //
+      static bool
+      to (const char* utf_str, char* iso_str);
+
+      static bool
+      to (const char* utf_str, size_t utf_size, char* iso_str);
+
+      // Convert from ISO-8859-1 to UTF-8.
+      //
+      static void
+      from (const char* iso_str, char* utf_str);
+
+      static void
+      from (const char* iso_str, size_t iso_size, char* utf_str);
+
+    private:
+      static char unrep_char_;
+    };
+  }
+}
+
+#include <xsde/cxx/iso8859-1.ixx>
+
+#endif  // XSDE_CXX_ISO8859_1_HXX