more boost stuff, necessary for base64 encoder and decoder

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/parkinglot@726 e5f2f494-b856-4b98-b285-d166d9295462

ext/boost/archive/iterators/base64_exception.hpp

@@ -0,0 +1,68 @@
+#ifndef BOOST_ARCHIVE_ITERATORS_BASE64_EXCEPTION_HPP
+#define BOOST_ARCHIVE_ITERATORS_BASE64_EXCEPTION_HPP
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// base64_exception.hpp:
+
+// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org for updates, documentation, and revision history.
+
+#include <boost/config.hpp>
+#ifndef BOOST_NO_EXCEPTIONS
+#include <exception>
+
+#include <cassert>
+
+namespace boost {
+namespace archive {
+namespace iterators {
+
+//////////////////////////////////////////////////////////////////////
+// exceptions thrown by base64s
+//
+class base64_exception : public std::exception
+{
+public:
+    typedef enum {
+        invalid_code,       // attempt to encode a value > 6 bits
+        invalid_character,  // decode a value not in base64 char set
+        other_exception
+    } exception_code;
+    exception_code code;
+
+    base64_exception(exception_code c = other_exception) : code(c)
+    {}
+
+    virtual const char *what( ) const throw( )
+    {
+        const char *msg = "unknown exception code";
+        switch(code){
+        case invalid_code:
+            msg = "attempt to encode a value > 6 bits";
+            break;
+        case invalid_character:
+            msg = "attempt to decode a value not in base64 char set";
+            break;
+        default:
+            assert(false);
+            break;
+        }
+        return msg;
+    }
+};
+
+} // namespace iterators
+} // namespace archive
+} // namespace boost
+
+#endif //BOOST_NO_EXCEPTIONS
+#endif //BOOST_ARCHIVE_ITERATORS_ARCHIVE_EXCEPTION_HPP