JSON Spirit updated to v4.06

14 files changed, 681 insertions, 382 deletions

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index c99b74f183..c3c99982ba 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -30,6 +30,8 @@ using namespace boost;
 using namespace boost::asio;
 using namespace json_spirit;
 
+static const char* Value_type_name[]={"obj", "array", "str", "bool", "int", "real", "null"};
+
 static std::string strRPCUserColonPass;
 
 // These are created by StartRPCThreads, destroyed in StopRPCThreads
diff --git a/src/json/LICENSE.txt b/src/json/LICENSE.txt
index 797d5363b3..6ed66a2e69 100644
--- a/src/json/LICENSE.txt
+++ b/src/json/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License
 
-Copyright (c) 2007 - 2009 John W. Wilkinson
+Copyright (c) 2007 - 2010 John W. Wilkinson
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
diff --git a/src/json/json_spirit.h b/src/json/json_spirit.h
index ac1879d5b3..ef442e9fd5 100644
--- a/src/json/json_spirit.h
+++ b/src/json/json_spirit.h
@@ -1,10 +1,10 @@
 #ifndef JSON_SPIRIT
 #define JSON_SPIRIT
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
diff --git a/src/json/json_spirit_error_position.h b/src/json/json_spirit_error_position.h
index 17208507df..e2b59b47ae 100644
--- a/src/json/json_spirit_error_position.h
+++ b/src/json/json_spirit_error_position.h
@@ -1,10 +1,10 @@
 #ifndef JSON_SPIRIT_ERROR_POSITION
 #define JSON_SPIRIT_ERROR_POSITION
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
@@ -48,7 +48,7 @@ namespace json_spirit
         return ( reason_ == lhs.reason_ ) &&
                ( line_   == lhs.line_ ) &&
                ( column_ == lhs.column_ ); 
-}
+    }
 }
 
 #endif
diff --git a/src/json/json_spirit_reader.cpp b/src/json/json_spirit_reader.cpp
index aa4f637226..7dea074736 100644
--- a/src/json/json_spirit_reader.cpp
+++ b/src/json/json_spirit_reader.cpp
@@ -1,137 +1,137 @@
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #include "json_spirit_reader.h"
 #include "json_spirit_reader_template.h"
 
 using namespace json_spirit;
 
-bool json_spirit::read( const std::string& s, Value& value )
-{
-    return read_string( s, value );
-}
-
-void json_spirit::read_or_throw( const std::string& s, Value& value )
-{
-    read_string_or_throw( s, value );
-}
-
-bool json_spirit::read( std::istream& is, Value& value )
-{
-    return read_stream( is, value );
-}
-
-void json_spirit::read_or_throw( std::istream& is, Value& value )
-{
-    read_stream_or_throw( is, value );
-}
-
-bool json_spirit::read( std::string::const_iterator& begin, std::string::const_iterator end, Value& value )
-{
-    return read_range( begin, end, value );
-}
-
-void json_spirit::read_or_throw( std::string::const_iterator& begin, std::string::const_iterator end, Value& value )
-{
-    begin = read_range_or_throw( begin, end, value );
-}
-
-#ifndef BOOST_NO_STD_WSTRING
-
-bool json_spirit::read( const std::wstring& s, wValue& value )
-{
-    return read_string( s, value );
-}
-
-void json_spirit::read_or_throw( const std::wstring& s, wValue& value )
-{
-    read_string_or_throw( s, value );
-}
-
-bool json_spirit::read( std::wistream& is, wValue& value )
-{
-    return read_stream( is, value );
-}
-
-void json_spirit::read_or_throw( std::wistream& is, wValue& value )
-{
-    read_stream_or_throw( is, value );
-}
-
-bool json_spirit::read( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wValue& value )
-{
-    return read_range( begin, end, value );
-}
-
-void json_spirit::read_or_throw( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wValue& value )
-{
-    begin = read_range_or_throw( begin, end, value );
-}
+#ifdef JSON_SPIRIT_VALUE_ENABLED
+    bool json_spirit::read( const std::string& s, Value& value )
+    {
+        return read_string( s, value );
+    }
+    
+    void json_spirit::read_or_throw( const std::string& s, Value& value )
+    {
+        read_string_or_throw( s, value );
+    }
+
+    bool json_spirit::read( std::istream& is, Value& value )
+    {
+        return read_stream( is, value );
+    }
+
+    void json_spirit::read_or_throw( std::istream& is, Value& value )
+    {
+        read_stream_or_throw( is, value );
+    }
+
+    bool json_spirit::read( std::string::const_iterator& begin, std::string::const_iterator end, Value& value )
+    {
+        return read_range( begin, end, value );
+    }
+
+    void json_spirit::read_or_throw( std::string::const_iterator& begin, std::string::const_iterator end, Value& value )
+    {
+        begin = read_range_or_throw( begin, end, value );
+    }
+#endif
 
+#if defined( JSON_SPIRIT_WVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
+    bool json_spirit::read( const std::wstring& s, wValue& value )
+    {
+        return read_string( s, value );
+    }
+
+    void json_spirit::read_or_throw( const std::wstring& s, wValue& value )
+    {
+        read_string_or_throw( s, value );
+    }
+
+    bool json_spirit::read( std::wistream& is, wValue& value )
+    {
+        return read_stream( is, value );
+    }
+
+    void json_spirit::read_or_throw( std::wistream& is, wValue& value )
+    {
+        read_stream_or_throw( is, value );
+    }
+
+    bool json_spirit::read( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wValue& value )
+    {
+        return read_range( begin, end, value );
+    }
+
+    void json_spirit::read_or_throw( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wValue& value )
+    {
+        begin = read_range_or_throw( begin, end, value );
+    }
 #endif
 
-bool json_spirit::read( const std::string& s, mValue& value )
-{
-    return read_string( s, value );
-}
-
-void json_spirit::read_or_throw( const std::string& s, mValue& value )
-{
-    read_string_or_throw( s, value );
-}
-
-bool json_spirit::read( std::istream& is, mValue& value )
-{
-    return read_stream( is, value );
-}
-
-void json_spirit::read_or_throw( std::istream& is, mValue& value )
-{
-    read_stream_or_throw( is, value );
-}
-
-bool json_spirit::read( std::string::const_iterator& begin, std::string::const_iterator end, mValue& value )
-{
-    return read_range( begin, end, value );
-}
-
-void json_spirit::read_or_throw( std::string::const_iterator& begin, std::string::const_iterator end, mValue& value )
-{
-    begin = read_range_or_throw( begin, end, value );
-}
-
-#ifndef BOOST_NO_STD_WSTRING
-
-bool json_spirit::read( const std::wstring& s, wmValue& value )
-{
-    return read_string( s, value );
-}
-
-void json_spirit::read_or_throw( const std::wstring& s, wmValue& value )
-{
-    read_string_or_throw( s, value );
-}
-
-bool json_spirit::read( std::wistream& is, wmValue& value )
-{
-    return read_stream( is, value );
-}
-
-void json_spirit::read_or_throw( std::wistream& is, wmValue& value )
-{
-    read_stream_or_throw( is, value );
-}
-
-bool json_spirit::read( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wmValue& value )
-{
-    return read_range( begin, end, value );
-}
-
-void json_spirit::read_or_throw( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wmValue& value )
-{
-    begin = read_range_or_throw( begin, end, value );
-}
+#ifdef JSON_SPIRIT_MVALUE_ENABLED
+    bool json_spirit::read( const std::string& s, mValue& value )
+    {
+        return read_string( s, value );
+    }
+
+    void json_spirit::read_or_throw( const std::string& s, mValue& value )
+    {
+        read_string_or_throw( s, value );
+    }
+    
+    bool json_spirit::read( std::istream& is, mValue& value )
+    {
+        return read_stream( is, value );
+    }
+
+    void json_spirit::read_or_throw( std::istream& is, mValue& value )
+    {
+        read_stream_or_throw( is, value );
+    }
+
+    bool json_spirit::read( std::string::const_iterator& begin, std::string::const_iterator end, mValue& value )
+    {
+        return read_range( begin, end, value );
+    }
+
+    void json_spirit::read_or_throw( std::string::const_iterator& begin, std::string::const_iterator end, mValue& value )
+    {
+        begin = read_range_or_throw( begin, end, value );
+    }
+#endif
 
+#if defined( JSON_SPIRIT_WMVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
+    bool json_spirit::read( const std::wstring& s, wmValue& value )
+    {
+        return read_string( s, value );
+    }
+
+    void json_spirit::read_or_throw( const std::wstring& s, wmValue& value )
+    {
+        read_string_or_throw( s, value );
+    }
+
+    bool json_spirit::read( std::wistream& is, wmValue& value )
+    {
+        return read_stream( is, value );
+    }
+
+    void json_spirit::read_or_throw( std::wistream& is, wmValue& value )
+    {
+        read_stream_or_throw( is, value );
+    }
+
+    bool json_spirit::read( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wmValue& value )
+    {
+        return read_range( begin, end, value );
+    }
+
+    void json_spirit::read_or_throw( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wmValue& value )
+    {
+        begin = read_range_or_throw( begin, end, value );
+    }
 #endif
diff --git a/src/json/json_spirit_reader.h b/src/json/json_spirit_reader.h
index 96494a9789..f0dc5330f2 100644
--- a/src/json/json_spirit_reader.h
+++ b/src/json/json_spirit_reader.h
@@ -1,10 +1,10 @@
 #ifndef JSON_SPIRIT_READER
 #define JSON_SPIRIT_READER
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
@@ -18,6 +18,7 @@ namespace json_spirit
 {
     // functions to reads a JSON values
 
+#ifdef JSON_SPIRIT_VALUE_ENABLED
     bool read( const std::string& s, Value& value );
     bool read( std::istream& is,     Value& value );
     bool read( std::string::const_iterator& begin, std::string::const_iterator end, Value& value );
@@ -25,9 +26,9 @@ namespace json_spirit
     void read_or_throw( const std::string& s, Value& value );  
     void read_or_throw( std::istream& is,     Value& value );
     void read_or_throw( std::string::const_iterator& begin, std::string::const_iterator end, Value& value );
+#endif
 
-#ifndef BOOST_NO_STD_WSTRING
-
+#if defined( JSON_SPIRIT_WVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
     bool read( const std::wstring& s, wValue& value );
     bool read( std::wistream&  is,    wValue& value );
     bool read( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wValue& value );    
@@ -35,9 +36,9 @@ namespace json_spirit
     void read_or_throw( const std::wstring& s, wValue& value );
     void read_or_throw( std::wistream& is,     wValue& value );
     void read_or_throw( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wValue& value );
-
 #endif
 
+#ifdef JSON_SPIRIT_MVALUE_ENABLED
     bool read( const std::string& s, mValue& value );
     bool read( std::istream& is,     mValue& value );
     bool read( std::string::const_iterator& begin, std::string::const_iterator end, mValue& value );
@@ -45,9 +46,9 @@ namespace json_spirit
     void read_or_throw( const std::string& s, mValue& value );  
     void read_or_throw( std::istream& is,     mValue& value );
     void read_or_throw( std::string::const_iterator& begin, std::string::const_iterator end, mValue& value );
+#endif
 
-#ifndef BOOST_NO_STD_WSTRING
-
+#if defined( JSON_SPIRIT_WMVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
     bool read( const std::wstring& s, wmValue& value );
     bool read( std::wistream& is,     wmValue& value );
     bool read( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wmValue& value );    
@@ -55,7 +56,6 @@ namespace json_spirit
     void read_or_throw( const std::wstring& s, wmValue& value );
     void read_or_throw( std::wistream& is,     wmValue& value );
     void read_or_throw( std::wstring::const_iterator& begin, std::wstring::const_iterator end, wmValue& value );
-
 #endif
 }
 
diff --git a/src/json/json_spirit_reader_template.h b/src/json/json_spirit_reader_template.h
index 4dec00e6c9..d3d0cecaa5 100644
--- a/src/json/json_spirit_reader_template.h
+++ b/src/json/json_spirit_reader_template.h
@@ -1,10 +1,14 @@
 #ifndef JSON_SPIRIT_READER_TEMPLATE
 #define JSON_SPIRIT_READER_TEMPLATE
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
 
 #include "json_spirit_value.h"
 #include "json_spirit_error_position.h"
@@ -484,7 +488,7 @@ namespace json_spirit
                     ;
 
                 string_ 
-                    = lexeme_d // this causes white space inside a string to be retained
+                    = lexeme_d // this causes white space and what would appear to be comments inside a string to be retained
                       [
                           confix_p
                           ( 
@@ -515,6 +519,44 @@ namespace json_spirit
     };
 
     template< class Iter_type, class Value_type >
+    void add_posn_iter_and_read_range_or_throw( Iter_type begin, Iter_type end, Value_type& value )
+    {
+        typedef spirit_namespace::position_iterator< Iter_type > Posn_iter_t;
+
+        const Posn_iter_t posn_begin( begin, end );
+        const Posn_iter_t posn_end( end, end );
+     
+        read_range_or_throw( posn_begin, posn_end, value );
+    }
+
+    template< class Istream_type >
+    struct Multi_pass_iters
+    {
+        typedef typename Istream_type::char_type Char_type;
+        typedef std::istream_iterator< Char_type, Char_type > istream_iter;
+        typedef spirit_namespace::multi_pass< istream_iter > Mp_iter;
+
+        Multi_pass_iters( Istream_type& is )
+        {
+            is.unsetf( std::ios::skipws );
+
+            begin_ = spirit_namespace::make_multi_pass( istream_iter( is ) );
+            end_   = spirit_namespace::make_multi_pass( istream_iter() );
+        }
+
+        Mp_iter begin_;
+        Mp_iter end_;
+    };
+
+    // reads a JSON Value from a pair of input iterators throwing an exception on invalid input, e.g.
+    //
+    // string::const_iterator start = str.begin();
+    // const string::const_iterator next = read_range_or_throw( str.begin(), str.end(), value );
+    //
+    // The iterator 'next' will point to the character past the 
+    // last one read.
+    //
+    template< class Iter_type, class Value_type >
     Iter_type read_range_or_throw( Iter_type begin, Iter_type end, Value_type& value )
     {
         Semantic_actions< Value_type, Iter_type > semantic_actions( value );
@@ -522,7 +564,9 @@ namespace json_spirit
         const spirit_namespace::parse_info< Iter_type > info = 
                             spirit_namespace::parse( begin, end, 
                                                     Json_grammer< Value_type, Iter_type >( semantic_actions ), 
-                                                    spirit_namespace::space_p );
+                                                    spirit_namespace::space_p | 
+                                                    spirit_namespace::comment_p("//") | 
+                                                    spirit_namespace::comment_p("/*", "*/") );
 
         if( !info.hit )
         {
@@ -533,17 +577,14 @@ namespace json_spirit
         return info.stop;
     }
 
-    template< class Iter_type, class Value_type >
-    void add_posn_iter_and_read_range_or_throw( Iter_type begin, Iter_type end, Value_type& value )
-    {
-        typedef spirit_namespace::position_iterator< Iter_type > Posn_iter_t;
-
-        const Posn_iter_t posn_begin( begin, end );
-        const Posn_iter_t posn_end( end, end );
-     
-        read_range_or_throw( posn_begin, posn_end, value );
-    }
-
+    // reads a JSON Value from a pair of input iterators, e.g.
+    //
+    // string::const_iterator start = str.begin();
+    // const bool success = read_string( start, str.end(), value );
+    //
+    // The iterator 'start' will point to the character past the 
+    // last one read.
+    //
     template< class Iter_type, class Value_type >
     bool read_range( Iter_type& begin, Iter_type end, Value_type& value )
     {
@@ -559,12 +600,10 @@ namespace json_spirit
         }
     }
 
-    template< class String_type, class Value_type >
-    void read_string_or_throw( const String_type& s, Value_type& value )
-    {
-        add_posn_iter_and_read_range_or_throw( s.begin(), s.end(), value );
-    }
-
+    // reads a JSON Value from a string, e.g.
+    //
+    // const bool success = read_string( str, value );
+    //
     template< class String_type, class Value_type >
     bool read_string( const String_type& s, Value_type& value )
     {
@@ -573,25 +612,20 @@ namespace json_spirit
         return read_range( begin, s.end(), value );
     }
 
-    template< class Istream_type >
-    struct Multi_pass_iters
+    // reads a JSON Value from a string throwing an exception on invalid input, e.g.
+    //
+    // read_string_or_throw( is, value );
+    //
+    template< class String_type, class Value_type >
+    void read_string_or_throw( const String_type& s, Value_type& value )
     {
-        typedef typename Istream_type::char_type Char_type;
-        typedef std::istream_iterator< Char_type, Char_type > istream_iter;
-        typedef spirit_namespace::multi_pass< istream_iter > Mp_iter;
-
-        Multi_pass_iters( Istream_type& is )
-        {
-            is.unsetf( std::ios::skipws );
-
-            begin_ = spirit_namespace::make_multi_pass( istream_iter( is ) );
-            end_   = spirit_namespace::make_multi_pass( istream_iter() );
-        }
-
-        Mp_iter begin_;
-        Mp_iter end_;
-    };
+        add_posn_iter_and_read_range_or_throw( s.begin(), s.end(), value );
+    }
 
+    // reads a JSON Value from a stream, e.g.
+    //
+    // const bool success = read_stream( is, value );
+    //
     template< class Istream_type, class Value_type >
     bool read_stream( Istream_type& is, Value_type& value )
     {
@@ -600,6 +634,10 @@ namespace json_spirit
         return read_range( mp_iters.begin_, mp_iters.end_, value );
     }
 
+    // reads a JSON Value from a stream throwing an exception on invalid input, e.g.
+    //
+    // read_stream_or_throw( is, value );
+    //
     template< class Istream_type, class Value_type >
     void read_stream_or_throw( Istream_type& is, Value_type& value )
     {
diff --git a/src/json/json_spirit_stream_reader.h b/src/json/json_spirit_stream_reader.h
index 7e59c9adc2..8bbdbc0543 100644
--- a/src/json/json_spirit_stream_reader.h
+++ b/src/json/json_spirit_stream_reader.h
@@ -1,10 +1,10 @@
 #ifndef JSON_SPIRIT_READ_STREAM
 #define JSON_SPIRIT_READ_STREAM
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
diff --git a/src/json/json_spirit_utils.h b/src/json/json_spirit_utils.h
index 553e3b96a4..a174ac3a98 100644
--- a/src/json/json_spirit_utils.h
+++ b/src/json/json_spirit_utils.h
@@ -1,10 +1,10 @@
 #ifndef JSON_SPIRIT_UTILS
 #define JSON_SPIRIT_UTILS
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
@@ -37,9 +37,11 @@ namespace json_spirit
         }
     }
 
+#ifdef JSON_SPIRIT_VALUE_ENABLED
     typedef std::map< std::string, Value > Mapped_obj;
+#endif
 
-#ifndef BOOST_NO_STD_WSTRING
+#if defined( JSON_SPIRIT_WVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
     typedef std::map< std::wstring, wValue > wMapped_obj;
 #endif
 
diff --git a/src/json/json_spirit_value.h b/src/json/json_spirit_value.h
index 7e83a2a7e3..a5020405d4 100644
--- a/src/json/json_spirit_value.h
+++ b/src/json/json_spirit_value.h
@@ -1,10 +1,10 @@
 #ifndef JSON_SPIRIT_VALUE
 #define JSON_SPIRIT_VALUE
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
@@ -21,11 +21,20 @@
 #include <boost/shared_ptr.hpp> 
 #include <boost/variant.hpp> 
 
+// comment out the value types you don't need to reduce build times and intermediate file sizes
+#define JSON_SPIRIT_VALUE_ENABLED
+#define JSON_SPIRIT_WVALUE_ENABLED
+#define JSON_SPIRIT_MVALUE_ENABLED
+#define JSON_SPIRIT_WMVALUE_ENABLED
+
 namespace json_spirit
 {
     enum Value_type{ obj_type, array_type, str_type, bool_type, int_type, real_type, null_type };
-    static const char* Value_type_name[]={"obj", "array", "str", "bool", "int", "real", "null"};
 
+    static std::string value_type_to_string( Value_type vtype );
+
+    struct Null{};
+    
     template< class Config >    // Config determines whether the value uses std::string or std::wstring and
                                 // whether JSON Objects are represented as vectors or maps
     class Value_impl
@@ -49,6 +58,12 @@ namespace json_spirit
         Value_impl( boost::uint64_t    value );
         Value_impl( double             value );
 
+        template< class Iter >
+        Value_impl( Iter first, Iter last );    // constructor from containers, e.g. std::vector or std::list
+
+        template< BOOST_VARIANT_ENUM_PARAMS( typename T ) >
+        Value_impl( const boost::variant< BOOST_VARIANT_ENUM_PARAMS(T) >& variant ); // constructor for compatible variant types
+
         Value_impl( const Value_impl& other );
 
         bool operator==( const Value_impl& lhs ) const;
@@ -81,13 +96,32 @@ namespace json_spirit
 
         void check_type( const Value_type vtype ) const;
 
-        typedef boost::variant< String_type, 
-                                boost::recursive_wrapper< Object >, boost::recursive_wrapper< Array >, 
-                                bool, boost::int64_t, double > Variant;
+        typedef boost::variant< boost::recursive_wrapper< Object >, boost::recursive_wrapper< Array >, 
+                                String_type, bool, boost::int64_t, double, Null, boost::uint64_t > Variant;
 
-        Value_type type_;
         Variant v_;
-        bool is_uint64_;
+
+        class Variant_converter_visitor : public boost::static_visitor< Variant > 
+        {
+        public:
+         
+              template< typename T, typename A, template< typename, typename > class Cont >
+              Variant operator()( const Cont< T, A >& cont ) const 
+              {
+                  return Array( cont.begin(), cont.end() );
+              }
+             
+              Variant operator()( int i ) const 
+              {
+                  return static_cast< boost::int64_t >( i );
+              }
+           
+              template<class T>
+              Variant operator()( const T& t ) const 
+              {
+                  return t;
+              }
+        };
     };
 
     // vector objects
@@ -98,6 +132,10 @@ namespace json_spirit
         typedef typename Config::String_type String_type;
         typedef typename Config::Value_type Value_type;
 
+        Pair_impl()
+        {
+        }
+
         Pair_impl( const String_type& name, const Value_type& value );
 
         bool operator==( const Pair_impl& lhs ) const;
@@ -106,6 +144,7 @@ namespace json_spirit
         Value_type value_;
     };
 
+#if defined( JSON_SPIRIT_VALUE_ENABLED ) || defined( JSON_SPIRIT_WVALUE_ENABLED )
     template< class String >
     struct Config_vector
     {
@@ -122,30 +161,32 @@ namespace json_spirit
             return obj.back().value_;
         }
                 
-        static String_type get_name( const Pair_type& pair )
+        static const String_type& get_name( const Pair_type& pair )
         {
             return pair.name_;
         }
                 
-        static Value_type get_value( const Pair_type& pair )
+        static const Value_type& get_value( const Pair_type& pair )
         {
             return pair.value_;
         }
     };
+#endif
 
     // typedefs for ASCII
 
+#ifdef JSON_SPIRIT_VALUE_ENABLED
     typedef Config_vector< std::string > Config;
 
     typedef Config::Value_type  Value;
     typedef Config::Pair_type   Pair;
     typedef Config::Object_type Object;
     typedef Config::Array_type  Array;
+#endif
 
     // typedefs for Unicode
 
-#ifndef BOOST_NO_STD_WSTRING
-
+#if defined( JSON_SPIRIT_WVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
     typedef Config_vector< std::wstring > wConfig;
 
     typedef wConfig::Value_type  wValue;
@@ -156,6 +197,7 @@ namespace json_spirit
 
     // map objects
 
+#if defined( JSON_SPIRIT_MVALUE_ENABLED ) || defined( JSON_SPIRIT_WMVALUE_ENABLED )
     template< class String >
     struct Config_map
     {
@@ -163,135 +205,134 @@ namespace json_spirit
         typedef Value_impl< Config_map > Value_type;
         typedef std::vector< Value_type > Array_type;
         typedef std::map< String_type, Value_type > Object_type;
-        typedef typename Object_type::value_type Pair_type;
+        typedef std::pair< const String_type, Value_type > Pair_type;
 
         static Value_type& add( Object_type& obj, const String_type& name, const Value_type& value )
         {
             return obj[ name ] = value;
         }
                 
-        static String_type get_name( const Pair_type& pair )
+        static const String_type& get_name( const Pair_type& pair )
         {
             return pair.first;
         }
                 
-        static Value_type get_value( const Pair_type& pair )
+        static const Value_type& get_value( const Pair_type& pair )
         {
             return pair.second;
         }
     };
+#endif
 
     // typedefs for ASCII
 
+#ifdef JSON_SPIRIT_MVALUE_ENABLED
     typedef Config_map< std::string > mConfig;
 
     typedef mConfig::Value_type  mValue;
     typedef mConfig::Object_type mObject;
     typedef mConfig::Array_type  mArray;
+#endif
 
     // typedefs for Unicode
 
-#ifndef BOOST_NO_STD_WSTRING
-
+#if defined( JSON_SPIRIT_WMVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
     typedef Config_map< std::wstring > wmConfig;
 
     typedef wmConfig::Value_type  wmValue;
     typedef wmConfig::Object_type wmObject;
     typedef wmConfig::Array_type  wmArray;
-
 #endif
 
     ///////////////////////////////////////////////////////////////////////////////////////////////
     //
     // implementation
 
+    inline bool operator==( const Null&, const Null& )
+    {
+        return true;
+    }
+
     template< class Config >
     const Value_impl< Config > Value_impl< Config >::null;
 
     template< class Config >
     Value_impl< Config >::Value_impl()
-    :   type_( null_type )
-    ,   is_uint64_( false )
+    :   v_( Null() )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( const Const_str_ptr value )
-    :   type_( str_type )
-    ,   v_( String_type( value ) )
-    ,   is_uint64_( false )
+    :  v_( String_type( value ) )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( const String_type& value )
-    :   type_( str_type )
-    ,   v_( value )
-    ,   is_uint64_( false )
+    :   v_( value )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( const Object& value )
-    :   type_( obj_type )
-    ,   v_( value )
-    ,   is_uint64_( false )
+    :   v_( value )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( const Array& value )
-    :   type_( array_type )
-    ,   v_( value )
-    ,   is_uint64_( false )
+    :   v_( value )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( bool value )
-    :   type_( bool_type )
-    ,   v_( value )
-    ,   is_uint64_( false )
+    :   v_( value )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( int value )
-    :   type_( int_type )
-    ,   v_( static_cast< boost::int64_t >( value ) )
-    ,   is_uint64_( false )
+    :   v_( static_cast< boost::int64_t >( value ) )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( boost::int64_t value )
-    :   type_( int_type )
-    ,   v_( value )
-    ,   is_uint64_( false )
+    :   v_( value )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( boost::uint64_t value )
-    :   type_( int_type )
-    ,   v_( static_cast< boost::int64_t >( value ) )
-    ,   is_uint64_( true )
+    :   v_( value )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( double value )
-    :   type_( real_type )
-    ,   v_( value )
-    ,   is_uint64_( false )
+    :   v_( value )
     {
     }
 
     template< class Config >
     Value_impl< Config >::Value_impl( const Value_impl< Config >& other )
-    :   type_( other.type() )
-    ,   v_( other.v_ )
-    ,   is_uint64_( other.is_uint64_ )
+    :   v_( other.v_ )
+    {
+    }
+
+    template< class Config >
+    template< class Iter >
+    Value_impl< Config >::Value_impl( Iter first, Iter last )
+    :   v_( Array( first, last ) )
+    {
+    }
+
+    template< class Config >
+    template< BOOST_VARIANT_ENUM_PARAMS( typename T ) >
+    Value_impl< Config >::Value_impl( const boost::variant< BOOST_VARIANT_ENUM_PARAMS(T) >& variant )
+    :   v_( boost::apply_visitor( Variant_converter_visitor(), variant) )
     {
     }
 
@@ -300,9 +341,7 @@ namespace json_spirit
     {
         Value_impl tmp( lhs );
 
-        std::swap( type_, tmp.type_ );
         std::swap( v_, tmp.v_ );
-        std::swap( is_uint64_, tmp.is_uint64_ );
 
         return *this;
     }
@@ -320,13 +359,18 @@ namespace json_spirit
     template< class Config >
     Value_type Value_impl< Config >::type() const
     {
-        return type_;
+        if( is_uint64() )
+        {
+            return int_type;
+        }
+
+        return static_cast< Value_type >( v_.which() );
     }
 
     template< class Config >
     bool Value_impl< Config >::is_uint64() const
     {
-        return is_uint64_;
+        return v_.which() == null_type + 1;
     }
 
     template< class Config >
@@ -342,8 +386,7 @@ namespace json_spirit
         {
             std::ostringstream os;
 
-            ///// Bitcoin: Tell the types by name instead of by number
-            os << "value is type " << Value_type_name[type()] << ", expected " << Value_type_name[vtype];
+            os << "get_value< " << value_type_to_string( vtype ) << " > called on " << value_type_to_string( type() ) << " Value";
 
             throw std::runtime_error( os.str() );
         }
@@ -352,7 +395,7 @@ namespace json_spirit
     template< class Config >
     const typename Config::String_type& Value_impl< Config >::get_str() const
     {
-        check_type(  str_type );
+        check_type( str_type );
 
         return *boost::get< String_type >( &v_ );
     }
@@ -368,7 +411,7 @@ namespace json_spirit
     template< class Config >
     const typename Value_impl< Config >::Array& Value_impl< Config >::get_array() const
     {
-        check_type(  array_type );
+        check_type( array_type );
 
         return *boost::get< Array >( &v_ );
     }
@@ -376,7 +419,7 @@ namespace json_spirit
     template< class Config >
     bool Value_impl< Config >::get_bool() const
     {
-        check_type(  bool_type );
+        check_type( bool_type );
 
         return boost::get< bool >( v_ );
     }
@@ -384,7 +427,7 @@ namespace json_spirit
     template< class Config >
     int Value_impl< Config >::get_int() const
     {
-        check_type(  int_type );
+        check_type( int_type );
 
         return static_cast< int >( get_int64() );
     }
@@ -392,7 +435,12 @@ namespace json_spirit
     template< class Config >
     boost::int64_t Value_impl< Config >::get_int64() const
     {
-        check_type(  int_type );
+        check_type( int_type );
+
+        if( is_uint64() )
+        {
+            return static_cast< boost::int64_t >( get_uint64() );
+        }
 
         return boost::get< boost::int64_t >( v_ );
     }
@@ -400,9 +448,14 @@ namespace json_spirit
     template< class Config >
     boost::uint64_t Value_impl< Config >::get_uint64() const
     {
-        check_type(  int_type );
+        check_type( int_type );
 
-        return static_cast< boost::uint64_t >( get_int64() );
+        if( !is_uint64() )
+        {
+            return static_cast< boost::uint64_t >( get_int64() );
+        }
+
+        return boost::get< boost::uint64_t >( v_ );
     }
 
     template< class Config >
@@ -414,7 +467,7 @@ namespace json_spirit
                                : static_cast< double >( get_int64() );
         }
 
-        check_type(  real_type );
+        check_type( real_type );
 
         return boost::get< double >( v_ );
     }
@@ -422,7 +475,7 @@ namespace json_spirit
     template< class Config >
     typename Value_impl< Config >::Object& Value_impl< Config >::get_obj()
     {
-        check_type(  obj_type );
+        check_type( obj_type );
 
         return *boost::get< Object >( &v_ );
     }
@@ -430,7 +483,7 @@ namespace json_spirit
     template< class Config >
     typename Value_impl< Config >::Array& Value_impl< Config >::get_array()
     {
-        check_type(  array_type );
+        check_type( array_type );
 
         return *boost::get< Array >( &v_ );
     }
@@ -529,6 +582,24 @@ namespace json_spirit
     {
         return internal_::get_value( *this, internal_::Type_to_type< T >() );
     }
+
+    static std::string value_type_to_string( const Value_type vtype )
+    {
+        switch( vtype )
+        {
+            case obj_type: return "Object";
+            case array_type: return "Array";
+            case str_type: return "string";
+            case bool_type: return "boolean";
+            case int_type: return "integer";
+            case real_type: return "real";
+            case null_type: return "null";
+        }
+
+        assert( false );
+
+        return "unknown type";
+    }
 }
 
 #endif
diff --git a/src/json/json_spirit_writer.cpp b/src/json/json_spirit_writer.cpp
index d24a632cf3..06d3f21d91 100644
--- a/src/json/json_spirit_writer.cpp
+++ b/src/json/json_spirit_writer.cpp
@@ -1,95 +1,96 @@
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #include "json_spirit_writer.h"
 #include "json_spirit_writer_template.h"
 
-void json_spirit::write( const Value& value, std::ostream& os )
-{
-    write_stream( value, os, false );
-}
-
-void json_spirit::write_formatted( const Value& value, std::ostream& os )
-{
-    write_stream( value, os, true );
-}
-
-std::string json_spirit::write( const Value& value )
-{
-    return write_string( value, false );
-}
-
-std::string json_spirit::write_formatted( const Value& value )
-{
-    return write_string( value, true );
-}
-
-#ifndef BOOST_NO_STD_WSTRING
-
-void json_spirit::write( const wValue& value, std::wostream& os )
-{
-    write_stream( value, os, false );
-}
-
-void json_spirit::write_formatted( const wValue& value, std::wostream& os )
-{
-    write_stream( value, os, true );
-}
-
-std::wstring json_spirit::write( const wValue&  value )
-{
-    return write_string( value, false );
-}
-
-std::wstring json_spirit::write_formatted( const wValue&  value )
-{
-    return write_string( value, true );
-}
-
+using namespace json_spirit;
+
+#ifdef JSON_SPIRIT_VALUE_ENABLED
+    void json_spirit::write( const Value& value, std::ostream& os, unsigned int options )
+    {
+        write_stream( value, os, options );
+    }
+    std::string json_spirit::write( const Value& value, unsigned int options )
+    {
+        return write_string( value, options );
+    }
+
+    void json_spirit::write_formatted( const Value& value, std::ostream& os )
+    {
+        write_stream( value, os, pretty_print );
+    }
+
+    std::string json_spirit::write_formatted( const Value& value )
+    {
+        return write_string( value, pretty_print );
+    }
 #endif
 
-void json_spirit::write( const mValue& value, std::ostream& os )
-{
-    write_stream( value, os, false );
-}
-
-void json_spirit::write_formatted( const mValue& value, std::ostream& os )
-{
-    write_stream( value, os, true );
-}
-
-std::string json_spirit::write( const mValue& value )
-{
-    return write_string( value, false );
-}
-
-std::string json_spirit::write_formatted( const mValue& value )
-{
-    return write_string( value, true );
-}
-
-#ifndef BOOST_NO_STD_WSTRING
-
-void json_spirit::write( const wmValue& value, std::wostream& os )
-{
-    write_stream( value, os, false );
-}
-
-void json_spirit::write_formatted( const wmValue& value, std::wostream& os )
-{
-    write_stream( value, os, true );
-}
-
-std::wstring json_spirit::write( const wmValue&  value )
-{
-    return write_string( value, false );
-}
+#ifdef JSON_SPIRIT_MVALUE_ENABLED
+    void json_spirit::write( const mValue& value, std::ostream& os, unsigned int options )
+    {
+        write_stream( value, os, options );
+    }
+
+    std::string json_spirit::write( const mValue& value, unsigned int options )
+    {
+        return write_string( value, options );
+    }
+
+    void json_spirit::write_formatted( const mValue& value, std::ostream& os )
+    {
+        write_stream( value, os, pretty_print );
+    }
+
+    std::string json_spirit::write_formatted( const mValue& value )
+    {
+        return write_string( value, pretty_print );
+    }
+#endif
 
-std::wstring json_spirit::write_formatted( const wmValue&  value )
-{
-    return write_string( value, true );
-}
+#if defined( JSON_SPIRIT_WVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
+    void json_spirit::write( const wValue& value, std::wostream& os, unsigned int options )
+    {
+        write_stream( value, os, options );
+    }
+
+    std::wstring json_spirit::write( const wValue& value, unsigned int options )
+    {
+        return write_string( value, options );
+    }
+
+    void json_spirit::write_formatted( const wValue& value, std::wostream& os )
+    {
+        write_stream( value, os, pretty_print );
+    }
+
+    std::wstring json_spirit::write_formatted( const wValue& value )
+    {
+        return write_string( value, pretty_print );
+    }
+#endif
 
+#if defined( JSON_SPIRIT_WMVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
+    void json_spirit::write_formatted( const wmValue& value, std::wostream& os )
+    {
+        write_stream( value, os, pretty_print );
+    }
+
+    std::wstring json_spirit::write_formatted( const wmValue& value )
+    {
+        return write_string( value, pretty_print );
+    }
+
+    void json_spirit::write( const wmValue& value, std::wostream& os, unsigned int options )
+    {
+        write_stream( value, os, options );
+    }
+
+    std::wstring json_spirit::write( const wmValue& value, unsigned int options )
+    {
+        return write_string( value, options );
+    }
 #endif
diff --git a/src/json/json_spirit_writer.h b/src/json/json_spirit_writer.h
index 52e14068e7..18c2fd4264 100644
--- a/src/json/json_spirit_writer.h
+++ b/src/json/json_spirit_writer.h
@@ -1,49 +1,62 @@
 #ifndef JSON_SPIRIT_WRITER
 #define JSON_SPIRIT_WRITER
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
 #endif
 
 #include "json_spirit_value.h"
+#include "json_spirit_writer_options.h"
 #include <iostream>
 
 namespace json_spirit
 {
-    // functions to convert JSON Values to text, 
-    // the "formatted" versions add whitespace to format the output nicely
+    // these functions to convert JSON Values to text
 
-    void         write          ( const Value& value, std::ostream&  os );
-    void         write_formatted( const Value& value, std::ostream&  os );
-    std::string  write          ( const Value& value );
-    std::string  write_formatted( const Value& value );
+#ifdef JSON_SPIRIT_VALUE_ENABLED
+    void         write( const Value&  value, std::ostream&  os, unsigned int options = 0 );
+    std::string  write( const Value&  value, unsigned int options = 0 );
+#endif
 
-#ifndef BOOST_NO_STD_WSTRING
+#ifdef JSON_SPIRIT_MVALUE_ENABLED
+    void         write( const mValue& value, std::ostream&  os, unsigned int options = 0 );
+    std::string  write( const mValue& value, unsigned int options = 0 );
+#endif
 
-    void         write          ( const wValue& value, std::wostream& os );
-    void         write_formatted( const wValue& value, std::wostream& os );
-    std::wstring write          ( const wValue& value );
-    std::wstring write_formatted( const wValue& value );
+#if defined( JSON_SPIRIT_WVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
+    void         write( const wValue&  value, std::wostream& os, unsigned int options = 0 );
+    std::wstring write( const wValue&  value, unsigned int options = 0 );
+#endif
 
+#if defined( JSON_SPIRIT_WMVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
+    void         write( const wmValue& value, std::wostream& os, unsigned int options = 0 );
+    std::wstring write( const wmValue& value, unsigned int options = 0 );
 #endif
 
-    void         write          ( const mValue& value, std::ostream&  os );
+    // these "formatted" versions of the "write" functions are the equivalent of the above functions
+    // with option "pretty_print"
+    
+#ifdef JSON_SPIRIT_VALUE_ENABLED
+    void         write_formatted( const Value& value, std::ostream&  os );
+    std::string  write_formatted( const Value& value );
+#endif
+#ifdef JSON_SPIRIT_MVALUE_ENABLED
     void         write_formatted( const mValue& value, std::ostream&  os );
-    std::string  write          ( const mValue& value );
     std::string  write_formatted( const mValue& value );
+#endif
 
-#ifndef BOOST_NO_STD_WSTRING
-
-    void         write          ( const wmValue& value, std::wostream& os );
+#if defined( JSON_SPIRIT_WVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
+    void         write_formatted( const wValue& value, std::wostream& os );
+    std::wstring write_formatted( const wValue& value );
+#endif
+#if defined( JSON_SPIRIT_WMVALUE_ENABLED ) && !defined( BOOST_NO_STD_WSTRING )
     void         write_formatted( const wmValue& value, std::wostream& os );
-    std::wstring write          ( const wmValue& value );
     std::wstring write_formatted( const wmValue& value );
-
 #endif
 }
 
diff --git a/src/json/json_spirit_writer_options.h b/src/json/json_spirit_writer_options.h
new file mode 100644
index 0000000000..ac6c57f33c
--- /dev/null
+++ b/src/json/json_spirit_writer_options.h
@@ -0,0 +1,33 @@
+#ifndef JSON_SPIRIT_WRITER_OPTIONS
+#define JSON_SPIRIT_WRITER_OPTIONS
+
+//          Copyright John W. Wilkinson 2007 - 2013
+// Distributed under the MIT License, see accompanying file LICENSE.txt
+
+// json spirit version 4.06
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+namespace json_spirit
+{
+    enum Output_options{ pretty_print = 0x01,   // Add whitespace to format the output nicely.
+
+                         raw_utf8 = 0x02,       // This prevents non-printable characters from being escapted using "\uNNNN" notation.
+                                                // Note, this is an extension to the JSON standard. It disables the escaping of
+                                                // non-printable characters allowing UTF-8 sequences held in 8 bit char strings
+                                                // to pass through unaltered.
+
+                         remove_trailing_zeros = 0x04,
+                                                // outputs e.g. "1.200000000000000" as "1.2"
+                         single_line_arrays = 0x08,
+                                                // pretty printing except that arrays printed on single lines unless they contain
+                                                // composite elements, i.e. objects or arrays
+                         always_escape_nonascii = 0x10,
+                                                // all unicode wide characters are escaped, i.e. outputed as "\uXXXX", even if they are
+                                                // printable under the current locale, ascii printable chars are not escaped
+                       };
+}
+
+#endif
diff --git a/src/json/json_spirit_writer_template.h b/src/json/json_spirit_writer_template.h
index 28c49ddc64..014d9d4cd0 100644
--- a/src/json/json_spirit_writer_template.h
+++ b/src/json/json_spirit_writer_template.h
@@ -1,16 +1,22 @@
 #ifndef JSON_SPIRIT_WRITER_TEMPLATE
 #define JSON_SPIRIT_WRITER_TEMPLATE
 
-//          Copyright John W. Wilkinson 2007 - 2009.
+//          Copyright John W. Wilkinson 2007 - 2013
 // Distributed under the MIT License, see accompanying file LICENSE.txt
 
-// json spirit version 4.03
+// json spirit version 4.06
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
 
 #include "json_spirit_value.h"
+#include "json_spirit_writer_options.h"
 
 #include <cassert>
 #include <sstream>
 #include <iomanip>
+#include <boost/io/ios_state.hpp>
 
 namespace json_spirit
 {
@@ -60,7 +66,7 @@ namespace json_spirit
     }
 
     template< class String_type >
-    String_type add_esc_chars( const String_type& s )
+    String_type add_esc_chars( const String_type& s, bool raw_utf8, bool esc_nonascii )
     {
         typedef typename String_type::const_iterator Iter_type;
         typedef typename String_type::value_type     Char_type;
@@ -75,21 +81,80 @@ namespace json_spirit
 
             if( add_esc_char( c, result ) ) continue;
 
-            const wint_t unsigned_c( ( c >= 0 ) ? c : 256 + c );
-
-            if( iswprint( unsigned_c ) )
+            if( raw_utf8 )
             {
                 result += c;
             }
             else
             {
-                result += non_printable_to_string< String_type >( unsigned_c );
+                const wint_t unsigned_c( ( c >= 0 ) ? c : 256 + c );
+
+                if( !esc_nonascii && iswprint( unsigned_c ) )
+                {
+                    result += c;
+                }
+                else
+                {
+                    result += non_printable_to_string< String_type >( unsigned_c );
+                }
+            }
+        }
+
+        return result;
+    }
+
+    template< class Ostream >
+    void append_double( Ostream& os, const double d, const int precision )
+    {
+        os << std::showpoint << std::setprecision( precision ) << d;
+    }
+
+    template< class String_type >
+    void erase_and_extract_exponent( String_type& str, String_type& exp )
+    {
+        const typename String_type::size_type exp_start= str.find( 'e' );
+
+        if( exp_start != String_type::npos )
+        {
+            exp = str.substr( exp_start );
+            str.erase( exp_start );
+        }
+    }
+
+    template< class String_type >
+    typename String_type::size_type find_first_non_zero( const String_type& str )
+    {
+        typename String_type::size_type result = str.size() - 1;
+
+        for( ; result != 0; --result )
+        {
+            if( str[ result ] != '0' )
+            {
+                break;
             }
         }
 
         return result;
     }
 
+    template< class String_type >
+    void remove_trailing( String_type& str )
+    {
+        String_type exp;
+
+        erase_and_extract_exponent( str, exp );
+
+        const typename String_type::size_type first_non_zero = find_first_non_zero( str );
+
+        if( first_non_zero != 0 )
+        {
+            const int offset = str[first_non_zero] == '.' ? 2 : 1;  // note zero digits following a decimal point is non standard
+            str.erase( first_non_zero + offset );
+        }
+
+        str += exp;
+    }
+
     // this class generates the JSON text,
     // it keeps track of the indentation level etc.
     //
@@ -105,10 +170,15 @@ namespace json_spirit
 
     public:
 
-        Generator( const Value_type& value, Ostream_type& os, bool pretty )
+        Generator( const Value_type& value, Ostream_type& os, unsigned int options )
         :   os_( os )
         ,   indentation_level_( 0 )
-        ,   pretty_( pretty )
+        ,   pretty_( ( options & pretty_print ) != 0 || ( options & single_line_arrays ) != 0 )
+        ,   raw_utf8_( ( options & raw_utf8 ) != 0 )
+        ,   esc_nonascii_( ( options & always_escape_nonascii ) != 0 )
+        ,   remove_trailing_zeros_( ( options & remove_trailing_zeros ) != 0 )
+        ,   single_line_arrays_( ( options & single_line_arrays ) != 0 )
+        ,   ios_saver_( os )
         {
             output( value );
         }
@@ -123,12 +193,8 @@ namespace json_spirit
                 case array_type: output( value.get_array() ); break;
                 case str_type:   output( value.get_str() );   break;
                 case bool_type:  output( value.get_bool() );  break;
+                case real_type:  output( value.get_real() );  break;
                 case int_type:   output_int( value );         break;
-
-                /// Bitcoin: Added std::fixed and changed precision from 16 to 8
-                case real_type:  os_ << std::showpoint << std::fixed << std::setprecision(8)
-                                     << value.get_real();     break;
-
                 case null_type:  os_ << "null";               break;
                 default: assert( false );
             }
@@ -139,11 +205,6 @@ namespace json_spirit
             output_array_or_obj( obj, '{', '}' );
         }
 
-        void output( const Array_type& arr )
-        {
-            output_array_or_obj( arr, '[', ']' );
-        }
-
         void output( const Obj_member_type& member )
         {
             output( Config_type::get_name( member ) ); space(); 
@@ -165,7 +226,7 @@ namespace json_spirit
 
         void output( const String_type& s )
         {
-            os_ << '"' << add_esc_chars( s ) << '"';
+            os_ << '"' << add_esc_chars( s, raw_utf8_, esc_nonascii_ ) << '"';
         }
 
         void output( bool b )
@@ -173,6 +234,75 @@ namespace json_spirit
             os_ << to_str< String_type >( b ? "true" : "false" );
         }
 
+        void output( double d )
+        {
+            if( remove_trailing_zeros_ )
+            {
+                std::basic_ostringstream< Char_type > os;
+
+                append_double( os, d, 16 );  // note precision is 16 so that we get some trailing space that we can remove,
+                                             // otherwise, 0.1234 gets converted to "0.12399999..."
+
+                String_type str = os.str();
+
+                remove_trailing( str );
+
+                os_ << str;
+            }
+            else
+            {
+                append_double( os_, d, 17 );
+            }
+        }
+
+        static bool contains_composite_elements( const Array_type& arr )
+        {
+            for( typename Array_type::const_iterator i = arr.begin(); i != arr.end(); ++i )
+            {
+                const Value_type& val = *i;
+
+                if( val.type() == obj_type ||
+                    val.type() == array_type )
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        template< class Iter >
+        void output_composite_item( Iter i, Iter last )
+        {
+            output( *i );
+
+            if( ++i != last )
+            {
+                os_ << ',';
+            }
+        }
+
+        void output( const Array_type& arr )
+        {
+            if( single_line_arrays_ && !contains_composite_elements( arr )  )
+            {
+                os_ << '['; space();
+               
+                for( typename Array_type::const_iterator i = arr.begin(); i != arr.end(); ++i )
+                {
+                    output_composite_item( i, arr.end() );
+
+                    space();
+                }
+
+                os_ << ']';
+            }
+            else
+            {
+                output_array_or_obj( arr, '[', ']' );
+            }
+        }
+
         template< class T >
         void output_array_or_obj( const T& t, Char_type start_char, Char_type end_char )
         {
@@ -182,14 +312,9 @@ namespace json_spirit
             
             for( typename T::const_iterator i = t.begin(); i != t.end(); ++i )
             {
-                indent(); output( *i );
+                indent();
 
-                typename T::const_iterator next = i;
-
-                if( ++next != t.end())
-                {
-                    os_ << ',';
-                }
+                output_composite_item( i, t.end() );
 
                 new_line();
             }
@@ -224,22 +349,36 @@ namespace json_spirit
         Ostream_type& os_;
         int indentation_level_;
         bool pretty_;
+        bool raw_utf8_;
+        bool esc_nonascii_;
+        bool remove_trailing_zeros_;
+        bool single_line_arrays_;
+        boost::io::basic_ios_all_saver< Char_type > ios_saver_;  // so that ostream state is reset after control is returned to the caller
     };
 
+    // writes JSON Value to a stream, e.g.
+    //
+    // write_stream( value, os, pretty_print );
+    //
     template< class Value_type, class Ostream_type >
-    void write_stream( const Value_type& value, Ostream_type& os, bool pretty )
+    void write_stream( const Value_type& value, Ostream_type& os, unsigned int options = 0 )
     {
-        Generator< Value_type, Ostream_type >( value, os, pretty );
+        os << std::dec;
+        Generator< Value_type, Ostream_type >( value, os, options );
     }
 
+    // writes JSON Value to a stream, e.g.
+    //
+    // const string json_str = write( value, pretty_print );
+    //
     template< class Value_type >
-    typename Value_type::String_type write_string( const Value_type& value, bool pretty )
+    typename Value_type::String_type write_string( const Value_type& value, unsigned int options = 0 )
     {
         typedef typename Value_type::String_type::value_type Char_type;
 
         std::basic_ostringstream< Char_type > os;
 
-        write_stream( value, os, pretty );
+        write_stream( value, os, options );
 
         return os.str();
     }