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535 lines
14 KiB
C++
535 lines
14 KiB
C++
#ifndef JSON_SPIRIT_VALUE
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#define JSON_SPIRIT_VALUE
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// Copyright John W. Wilkinson 2007 - 2009.
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// Distributed under the MIT License, see accompanying file LICENSE.txt
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// json spirit version 4.03
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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#include <vector>
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#include <map>
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#include <string>
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#include <cassert>
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#include <sstream>
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#include <stdexcept>
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#include <boost/config.hpp>
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#include <boost/cstdint.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/variant.hpp>
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namespace json_spirit
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{
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enum Value_type{ obj_type, array_type, str_type, bool_type, int_type, real_type, null_type };
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static const char* Value_type_name[]={"obj", "array", "str", "bool", "int", "real", "null"};
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template< class Config > // Config determines whether the value uses std::string or std::wstring and
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// whether JSON Objects are represented as vectors or maps
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class Value_impl
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{
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public:
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typedef Config Config_type;
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typedef typename Config::String_type String_type;
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typedef typename Config::Object_type Object;
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typedef typename Config::Array_type Array;
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typedef typename String_type::const_pointer Const_str_ptr; // eg const char*
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Value_impl(); // creates null value
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Value_impl( Const_str_ptr value );
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Value_impl( const String_type& value );
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Value_impl( const Object& value );
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Value_impl( const Array& value );
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Value_impl( bool value );
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Value_impl( int value );
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Value_impl( boost::int64_t value );
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Value_impl( boost::uint64_t value );
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Value_impl( double value );
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Value_impl( const Value_impl& other );
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bool operator==( const Value_impl& lhs ) const;
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Value_impl& operator=( const Value_impl& lhs );
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Value_type type() const;
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bool is_uint64() const;
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bool is_null() const;
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const String_type& get_str() const;
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const Object& get_obj() const;
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const Array& get_array() const;
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bool get_bool() const;
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int get_int() const;
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boost::int64_t get_int64() const;
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boost::uint64_t get_uint64() const;
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double get_real() const;
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Object& get_obj();
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Array& get_array();
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template< typename T > T get_value() const; // example usage: int i = value.get_value< int >();
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// or double d = value.get_value< double >();
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static const Value_impl null;
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private:
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void check_type( const Value_type vtype ) const;
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typedef boost::variant< String_type,
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boost::recursive_wrapper< Object >, boost::recursive_wrapper< Array >,
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bool, boost::int64_t, double > Variant;
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Value_type type_;
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Variant v_;
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bool is_uint64_;
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};
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// vector objects
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template< class Config >
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struct Pair_impl
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{
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typedef typename Config::String_type String_type;
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typedef typename Config::Value_type Value_type;
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Pair_impl( const String_type& name, const Value_type& value );
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bool operator==( const Pair_impl& lhs ) const;
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String_type name_;
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Value_type value_;
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};
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template< class String >
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struct Config_vector
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{
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typedef String String_type;
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typedef Value_impl< Config_vector > Value_type;
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typedef Pair_impl < Config_vector > Pair_type;
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typedef std::vector< Value_type > Array_type;
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typedef std::vector< Pair_type > Object_type;
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static Value_type& add( Object_type& obj, const String_type& name, const Value_type& value )
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{
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obj.push_back( Pair_type( name , value ) );
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return obj.back().value_;
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}
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static String_type get_name( const Pair_type& pair )
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{
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return pair.name_;
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}
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static Value_type get_value( const Pair_type& pair )
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{
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return pair.value_;
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}
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};
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// typedefs for ASCII
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typedef Config_vector< std::string > Config;
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typedef Config::Value_type Value;
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typedef Config::Pair_type Pair;
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typedef Config::Object_type Object;
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typedef Config::Array_type Array;
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// typedefs for Unicode
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#ifndef BOOST_NO_STD_WSTRING
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typedef Config_vector< std::wstring > wConfig;
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typedef wConfig::Value_type wValue;
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typedef wConfig::Pair_type wPair;
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typedef wConfig::Object_type wObject;
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typedef wConfig::Array_type wArray;
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#endif
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// map objects
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template< class String >
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struct Config_map
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{
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typedef String String_type;
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typedef Value_impl< Config_map > Value_type;
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typedef std::vector< Value_type > Array_type;
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typedef std::map< String_type, Value_type > Object_type;
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typedef typename Object_type::value_type Pair_type;
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static Value_type& add( Object_type& obj, const String_type& name, const Value_type& value )
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{
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return obj[ name ] = value;
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}
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static String_type get_name( const Pair_type& pair )
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{
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return pair.first;
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}
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static Value_type get_value( const Pair_type& pair )
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{
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return pair.second;
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}
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};
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// typedefs for ASCII
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typedef Config_map< std::string > mConfig;
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typedef mConfig::Value_type mValue;
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typedef mConfig::Object_type mObject;
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typedef mConfig::Array_type mArray;
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// typedefs for Unicode
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#ifndef BOOST_NO_STD_WSTRING
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typedef Config_map< std::wstring > wmConfig;
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typedef wmConfig::Value_type wmValue;
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typedef wmConfig::Object_type wmObject;
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typedef wmConfig::Array_type wmArray;
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#endif
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///////////////////////////////////////////////////////////////////////////////////////////////
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//
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// implementation
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template< class Config >
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const Value_impl< Config > Value_impl< Config >::null;
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template< class Config >
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Value_impl< Config >::Value_impl()
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: type_( null_type )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( const Const_str_ptr value )
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: type_( str_type )
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, v_( String_type( value ) )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( const String_type& value )
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: type_( str_type )
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, v_( value )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( const Object& value )
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: type_( obj_type )
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, v_( value )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( const Array& value )
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: type_( array_type )
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, v_( value )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( bool value )
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: type_( bool_type )
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, v_( value )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( int value )
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: type_( int_type )
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, v_( static_cast< boost::int64_t >( value ) )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( boost::int64_t value )
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: type_( int_type )
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, v_( value )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( boost::uint64_t value )
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: type_( int_type )
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, v_( static_cast< boost::int64_t >( value ) )
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, is_uint64_( true )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( double value )
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: type_( real_type )
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, v_( value )
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, is_uint64_( false )
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{
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}
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template< class Config >
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Value_impl< Config >::Value_impl( const Value_impl< Config >& other )
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: type_( other.type() )
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, v_( other.v_ )
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, is_uint64_( other.is_uint64_ )
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{
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}
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template< class Config >
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Value_impl< Config >& Value_impl< Config >::operator=( const Value_impl& lhs )
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{
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Value_impl tmp( lhs );
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std::swap( type_, tmp.type_ );
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std::swap( v_, tmp.v_ );
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std::swap( is_uint64_, tmp.is_uint64_ );
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return *this;
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}
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template< class Config >
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bool Value_impl< Config >::operator==( const Value_impl& lhs ) const
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{
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if( this == &lhs ) return true;
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if( type() != lhs.type() ) return false;
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return v_ == lhs.v_;
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}
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template< class Config >
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Value_type Value_impl< Config >::type() const
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{
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return type_;
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}
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template< class Config >
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bool Value_impl< Config >::is_uint64() const
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{
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return is_uint64_;
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}
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template< class Config >
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bool Value_impl< Config >::is_null() const
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{
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return type() == null_type;
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}
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template< class Config >
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void Value_impl< Config >::check_type( const Value_type vtype ) const
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{
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if( type() != vtype )
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{
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std::ostringstream os;
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///// Bitcoin: Tell the types by name instead of by number
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os << "value is type " << Value_type_name[type()] << ", expected " << Value_type_name[vtype];
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throw std::runtime_error( os.str() );
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}
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}
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template< class Config >
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const typename Config::String_type& Value_impl< Config >::get_str() const
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{
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check_type( str_type );
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return *boost::get< String_type >( &v_ );
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}
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template< class Config >
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const typename Value_impl< Config >::Object& Value_impl< Config >::get_obj() const
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{
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check_type( obj_type );
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return *boost::get< Object >( &v_ );
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}
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template< class Config >
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const typename Value_impl< Config >::Array& Value_impl< Config >::get_array() const
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{
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check_type( array_type );
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return *boost::get< Array >( &v_ );
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}
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template< class Config >
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bool Value_impl< Config >::get_bool() const
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{
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check_type( bool_type );
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return boost::get< bool >( v_ );
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}
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template< class Config >
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int Value_impl< Config >::get_int() const
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{
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check_type( int_type );
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return static_cast< int >( get_int64() );
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}
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template< class Config >
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boost::int64_t Value_impl< Config >::get_int64() const
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{
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check_type( int_type );
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return boost::get< boost::int64_t >( v_ );
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}
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template< class Config >
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boost::uint64_t Value_impl< Config >::get_uint64() const
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{
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check_type( int_type );
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return static_cast< boost::uint64_t >( get_int64() );
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}
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template< class Config >
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double Value_impl< Config >::get_real() const
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{
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if( type() == int_type )
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{
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return is_uint64() ? static_cast< double >( get_uint64() )
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: static_cast< double >( get_int64() );
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}
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check_type( real_type );
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return boost::get< double >( v_ );
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}
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template< class Config >
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typename Value_impl< Config >::Object& Value_impl< Config >::get_obj()
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{
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check_type( obj_type );
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return *boost::get< Object >( &v_ );
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}
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template< class Config >
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typename Value_impl< Config >::Array& Value_impl< Config >::get_array()
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{
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check_type( array_type );
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return *boost::get< Array >( &v_ );
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}
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template< class Config >
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Pair_impl< Config >::Pair_impl( const String_type& name, const Value_type& value )
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: name_( name )
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, value_( value )
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{
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}
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template< class Config >
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bool Pair_impl< Config >::operator==( const Pair_impl< Config >& lhs ) const
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{
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if( this == &lhs ) return true;
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return ( name_ == lhs.name_ ) && ( value_ == lhs.value_ );
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}
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// converts a C string, ie. 8 bit char array, to a string object
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//
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template < class String_type >
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String_type to_str( const char* c_str )
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{
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String_type result;
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for( const char* p = c_str; *p != 0; ++p )
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{
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result += *p;
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}
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return result;
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}
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//
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namespace internal_
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{
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template< typename T >
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struct Type_to_type
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{
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};
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template< class Value >
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int get_value( const Value& value, Type_to_type< int > )
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{
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return value.get_int();
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}
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template< class Value >
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boost::int64_t get_value( const Value& value, Type_to_type< boost::int64_t > )
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{
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return value.get_int64();
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}
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template< class Value >
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boost::uint64_t get_value( const Value& value, Type_to_type< boost::uint64_t > )
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{
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return value.get_uint64();
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}
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template< class Value >
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double get_value( const Value& value, Type_to_type< double > )
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{
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return value.get_real();
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}
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template< class Value >
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typename Value::String_type get_value( const Value& value, Type_to_type< typename Value::String_type > )
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{
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return value.get_str();
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}
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template< class Value >
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typename Value::Array get_value( const Value& value, Type_to_type< typename Value::Array > )
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{
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return value.get_array();
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}
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template< class Value >
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typename Value::Object get_value( const Value& value, Type_to_type< typename Value::Object > )
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{
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return value.get_obj();
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}
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template< class Value >
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bool get_value( const Value& value, Type_to_type< bool > )
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{
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return value.get_bool();
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}
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}
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template< class Config >
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template< typename T >
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T Value_impl< Config >::get_value() const
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{
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return internal_::get_value( *this, internal_::Type_to_type< T >() );
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}
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}
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#endif
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