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Diffstat (limited to 'src/json/json_spirit_value.h')
| -rw-r--r-- | src/json/json_spirit_value.h | 534 |
1 files changed, 534 insertions, 0 deletions
diff --git a/src/json/json_spirit_value.h b/src/json/json_spirit_value.h new file mode 100644 index 0000000000..7e83a2a7e3 --- /dev/null +++ b/src/json/json_spirit_value.h @@ -0,0 +1,534 @@ +#ifndef JSON_SPIRIT_VALUE +#define JSON_SPIRIT_VALUE + +// Copyright John W. Wilkinson 2007 - 2009. +// Distributed under the MIT License, see accompanying file LICENSE.txt + +// json spirit version 4.03 + +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma once +#endif + +#include <vector> +#include <map> +#include <string> +#include <cassert> +#include <sstream> +#include <stdexcept> +#include <boost/config.hpp> +#include <boost/cstdint.hpp> +#include <boost/shared_ptr.hpp> +#include <boost/variant.hpp> + +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"}; + + 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 + { + public: + + typedef Config Config_type; + typedef typename Config::String_type String_type; + typedef typename Config::Object_type Object; + typedef typename Config::Array_type Array; + typedef typename String_type::const_pointer Const_str_ptr; // eg const char* + + Value_impl(); // creates null value + Value_impl( Const_str_ptr value ); + Value_impl( const String_type& value ); + Value_impl( const Object& value ); + Value_impl( const Array& value ); + Value_impl( bool value ); + Value_impl( int value ); + Value_impl( boost::int64_t value ); + Value_impl( boost::uint64_t value ); + Value_impl( double value ); + + Value_impl( const Value_impl& other ); + + bool operator==( const Value_impl& lhs ) const; + + Value_impl& operator=( const Value_impl& lhs ); + + Value_type type() const; + + bool is_uint64() const; + bool is_null() const; + + const String_type& get_str() const; + const Object& get_obj() const; + const Array& get_array() const; + bool get_bool() const; + int get_int() const; + boost::int64_t get_int64() const; + boost::uint64_t get_uint64() const; + double get_real() const; + + Object& get_obj(); + Array& get_array(); + + template< typename T > T get_value() const; // example usage: int i = value.get_value< int >(); + // or double d = value.get_value< double >(); + + static const Value_impl null; + + private: + + 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; + + Value_type type_; + Variant v_; + bool is_uint64_; + }; + + // vector objects + + template< class Config > + struct Pair_impl + { + typedef typename Config::String_type String_type; + typedef typename Config::Value_type Value_type; + + Pair_impl( const String_type& name, const Value_type& value ); + + bool operator==( const Pair_impl& lhs ) const; + + String_type name_; + Value_type value_; + }; + + template< class String > + struct Config_vector + { + typedef String String_type; + typedef Value_impl< Config_vector > Value_type; + typedef Pair_impl < Config_vector > Pair_type; + typedef std::vector< Value_type > Array_type; + typedef std::vector< Pair_type > Object_type; + + static Value_type& add( Object_type& obj, const String_type& name, const Value_type& value ) + { + obj.push_back( Pair_type( name , value ) ); + + return obj.back().value_; + } + + static String_type get_name( const Pair_type& pair ) + { + return pair.name_; + } + + static Value_type get_value( const Pair_type& pair ) + { + return pair.value_; + } + }; + + // typedefs for ASCII + + 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; + + // typedefs for Unicode + +#ifndef BOOST_NO_STD_WSTRING + + typedef Config_vector< std::wstring > wConfig; + + typedef wConfig::Value_type wValue; + typedef wConfig::Pair_type wPair; + typedef wConfig::Object_type wObject; + typedef wConfig::Array_type wArray; +#endif + + // map objects + + template< class String > + struct Config_map + { + typedef String String_type; + 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; + + 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 ) + { + return pair.first; + } + + static Value_type get_value( const Pair_type& pair ) + { + return pair.second; + } + }; + + // typedefs for ASCII + + typedef Config_map< std::string > mConfig; + + typedef mConfig::Value_type mValue; + typedef mConfig::Object_type mObject; + typedef mConfig::Array_type mArray; + + // typedefs for Unicode + +#ifndef 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 + + 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 ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( const Const_str_ptr value ) + : type_( str_type ) + , v_( String_type( value ) ) + , is_uint64_( false ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( const String_type& value ) + : type_( str_type ) + , v_( value ) + , is_uint64_( false ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( const Object& value ) + : type_( obj_type ) + , v_( value ) + , is_uint64_( false ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( const Array& value ) + : type_( array_type ) + , v_( value ) + , is_uint64_( false ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( bool value ) + : type_( bool_type ) + , v_( value ) + , is_uint64_( false ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( int value ) + : type_( int_type ) + , v_( static_cast< boost::int64_t >( value ) ) + , is_uint64_( false ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( boost::int64_t value ) + : type_( int_type ) + , v_( value ) + , is_uint64_( false ) + { + } + + 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 ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( double value ) + : type_( real_type ) + , v_( value ) + , is_uint64_( false ) + { + } + + template< class Config > + Value_impl< Config >::Value_impl( const Value_impl< Config >& other ) + : type_( other.type() ) + , v_( other.v_ ) + , is_uint64_( other.is_uint64_ ) + { + } + + template< class Config > + Value_impl< Config >& Value_impl< Config >::operator=( const Value_impl& lhs ) + { + Value_impl tmp( lhs ); + + std::swap( type_, tmp.type_ ); + std::swap( v_, tmp.v_ ); + std::swap( is_uint64_, tmp.is_uint64_ ); + + return *this; + } + + template< class Config > + bool Value_impl< Config >::operator==( const Value_impl& lhs ) const + { + if( this == &lhs ) return true; + + if( type() != lhs.type() ) return false; + + return v_ == lhs.v_; + } + + template< class Config > + Value_type Value_impl< Config >::type() const + { + return type_; + } + + template< class Config > + bool Value_impl< Config >::is_uint64() const + { + return is_uint64_; + } + + template< class Config > + bool Value_impl< Config >::is_null() const + { + return type() == null_type; + } + + template< class Config > + void Value_impl< Config >::check_type( const Value_type vtype ) const + { + if( type() != vtype ) + { + 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]; + + throw std::runtime_error( os.str() ); + } + } + + template< class Config > + const typename Config::String_type& Value_impl< Config >::get_str() const + { + check_type( str_type ); + + return *boost::get< String_type >( &v_ ); + } + + template< class Config > + const typename Value_impl< Config >::Object& Value_impl< Config >::get_obj() const + { + check_type( obj_type ); + + return *boost::get< Object >( &v_ ); + } + + template< class Config > + const typename Value_impl< Config >::Array& Value_impl< Config >::get_array() const + { + check_type( array_type ); + + return *boost::get< Array >( &v_ ); + } + + template< class Config > + bool Value_impl< Config >::get_bool() const + { + check_type( bool_type ); + + return boost::get< bool >( v_ ); + } + + template< class Config > + int Value_impl< Config >::get_int() const + { + check_type( int_type ); + + return static_cast< int >( get_int64() ); + } + + template< class Config > + boost::int64_t Value_impl< Config >::get_int64() const + { + check_type( int_type ); + + return boost::get< boost::int64_t >( v_ ); + } + + template< class Config > + boost::uint64_t Value_impl< Config >::get_uint64() const + { + check_type( int_type ); + + return static_cast< boost::uint64_t >( get_int64() ); + } + + template< class Config > + double Value_impl< Config >::get_real() const + { + if( type() == int_type ) + { + return is_uint64() ? static_cast< double >( get_uint64() ) + : static_cast< double >( get_int64() ); + } + + check_type( real_type ); + + return boost::get< double >( v_ ); + } + + template< class Config > + typename Value_impl< Config >::Object& Value_impl< Config >::get_obj() + { + check_type( obj_type ); + + return *boost::get< Object >( &v_ ); + } + + template< class Config > + typename Value_impl< Config >::Array& Value_impl< Config >::get_array() + { + check_type( array_type ); + + return *boost::get< Array >( &v_ ); + } + + template< class Config > + Pair_impl< Config >::Pair_impl( const String_type& name, const Value_type& value ) + : name_( name ) + , value_( value ) + { + } + + template< class Config > + bool Pair_impl< Config >::operator==( const Pair_impl< Config >& lhs ) const + { + if( this == &lhs ) return true; + + return ( name_ == lhs.name_ ) && ( value_ == lhs.value_ ); + } + + // converts a C string, ie. 8 bit char array, to a string object + // + template < class String_type > + String_type to_str( const char* c_str ) + { + String_type result; + + for( const char* p = c_str; *p != 0; ++p ) + { + result += *p; + } + + return result; + } + + // + + namespace internal_ + { + template< typename T > + struct Type_to_type + { + }; + + template< class Value > + int get_value( const Value& value, Type_to_type< int > ) + { + return value.get_int(); + } + + template< class Value > + boost::int64_t get_value( const Value& value, Type_to_type< boost::int64_t > ) + { + return value.get_int64(); + } + + template< class Value > + boost::uint64_t get_value( const Value& value, Type_to_type< boost::uint64_t > ) + { + return value.get_uint64(); + } + + template< class Value > + double get_value( const Value& value, Type_to_type< double > ) + { + return value.get_real(); + } + + template< class Value > + typename Value::String_type get_value( const Value& value, Type_to_type< typename Value::String_type > ) + { + return value.get_str(); + } + + template< class Value > + typename Value::Array get_value( const Value& value, Type_to_type< typename Value::Array > ) + { + return value.get_array(); + } + + template< class Value > + typename Value::Object get_value( const Value& value, Type_to_type< typename Value::Object > ) + { + return value.get_obj(); + } + + template< class Value > + bool get_value( const Value& value, Type_to_type< bool > ) + { + return value.get_bool(); + } + } + + template< class Config > + template< typename T > + T Value_impl< Config >::get_value() const + { + return internal_::get_value( *this, internal_::Type_to_type< T >() ); + } +} + +#endif |