636 lines
17 KiB
C++
636 lines
17 KiB
C++
#include <fc/variant.hpp>
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#include <fc/variant_object.hpp>
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#include <fc/exception/exception.hpp>
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#include <fc/io/sstream.hpp>
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#include <fc/io/json.hpp>
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#include <fc/io/stdio.hpp>
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#include <string.h>
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//#include <fc/crypto/base64.hpp>
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#include <fc/crypto/hex.hpp>
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#include <boost/scoped_array.hpp>
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#include <fc/reflect/variant.hpp>
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namespace fc
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{
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void to_variant( const uint16_t& var, variant& vo ) { vo = uint64_t(var); }
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// TODO: warn on overflow?
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void from_variant( const variant& var, uint16_t& vo ){ vo = static_cast<uint16_t>(var.as_uint64()); }
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void to_variant( const int16_t& var, variant& vo ) { vo = int64_t(var); }
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// TODO: warn on overflow?
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void from_variant( const variant& var, int16_t& vo ){ vo = static_cast<int16_t>(var.as_int64()); }
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void to_variant( const std::vector<char>& var, variant& vo )
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{
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if( var.size() )
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//vo = variant(base64_encode((unsigned char*)var.data(),var.size()));
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vo = variant(to_hex(var.data(),var.size()));
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else vo = "";
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}
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void from_variant( const variant& var, std::vector<char>& vo )
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{
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auto str = var.as_string();
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vo.resize( str.size() / 2 );
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if( vo.size() )
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{
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size_t r = from_hex( str, vo.data(), vo.size() );
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FC_ASSERT( r = vo.size() );
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}
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// std::string b64 = base64_decode( var.as_string() );
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// vo = std::vector<char>( b64.c_str(), b64.c_str() + b64.size() );
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}
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/**
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* The TypeID is stored in the 'last byte' of the variant.
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*/
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void set_variant_type( variant* v, variant::type_id t)
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{
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char* data = reinterpret_cast<char*>(v);
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data[ sizeof(variant) -1 ] = t;
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}
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variant::variant()
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{
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set_variant_type( this, null_type );
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}
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variant::variant( fc::nullptr_t )
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{
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set_variant_type( this, null_type );
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}
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variant::variant( uint32_t val )
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{
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*reinterpret_cast<int64_t*>(this) = val;
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set_variant_type( this, int64_type );
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}
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variant::variant( int64_t val )
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{
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*reinterpret_cast<int64_t*>(this) = val;
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set_variant_type( this, int64_type );
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}
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variant::variant( int val )
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{
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*reinterpret_cast<int64_t*>(this) = val;
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set_variant_type( this, int64_type );
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}
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variant::variant( float val )
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{
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*reinterpret_cast<double*>(this) = val;
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set_variant_type( this, double_type );
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}
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variant::variant( uint64_t val )
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{
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*reinterpret_cast<uint64_t*>(this) = val;
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set_variant_type( this, uint64_type );
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}
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variant::variant( double val )
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{
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*reinterpret_cast<double*>(this) = val;
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set_variant_type( this, double_type );
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}
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variant::variant( bool val )
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{
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*reinterpret_cast<bool*>(this) = val;
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set_variant_type( this, bool_type );
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}
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variant::variant( char* str )
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{
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*reinterpret_cast<string**>(this) = new string( str );
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set_variant_type( this, string_type );
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}
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variant::variant( const char* str )
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{
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*reinterpret_cast<string**>(this) = new string( str );
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set_variant_type( this, string_type );
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}
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// TODO: do a proper conversion to utf8
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variant::variant( wchar_t* str )
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{
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size_t len = wcslen(str);
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boost::scoped_array<char> buffer(new char[len]);
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for (unsigned i = 0; i < len; ++i)
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buffer[i] = (char)str[i];
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*reinterpret_cast<string**>(this) = new string(buffer.get(), len);
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set_variant_type( this, string_type );
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}
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// TODO: do a proper conversion to utf8
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variant::variant( const wchar_t* str )
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{
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size_t len = wcslen(str);
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boost::scoped_array<char> buffer(new char[len]);
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for (unsigned i = 0; i < len; ++i)
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buffer[i] = (char)str[i];
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*reinterpret_cast<string**>(this) = new string(buffer.get(), len);
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set_variant_type( this, string_type );
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}
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variant::variant( fc::string val )
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{
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*reinterpret_cast<string**>(this) = new string( fc::move(val) );
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set_variant_type( this, string_type );
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}
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variant::variant( variant_object obj)
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{
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*reinterpret_cast<variant_object**>(this) = new variant_object(fc::move(obj));
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set_variant_type(this, object_type );
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}
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variant::variant( mutable_variant_object obj)
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{
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*reinterpret_cast<variant_object**>(this) = new variant_object(fc::move(obj));
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set_variant_type(this, object_type );
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}
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variant::variant( variants arr )
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{
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*reinterpret_cast<variants**>(this) = new variants(fc::move(arr));
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set_variant_type(this, array_type );
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}
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typedef const variant_object* const_variant_object_ptr;
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typedef const variants* const_variants_ptr;
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typedef const string* const_string_ptr;
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void variant::clear()
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{
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switch( get_type() )
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{
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case object_type:
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delete *reinterpret_cast<variant_object**>(this);
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break;
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case array_type:
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delete *reinterpret_cast<variants**>(this);
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break;
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case string_type:
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delete *reinterpret_cast<string**>(this);
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break;
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default:
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break;
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}
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set_variant_type( this, null_type );
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}
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variant::variant( const variant& v )
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{
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switch( v.get_type() )
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{
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case object_type:
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*reinterpret_cast<variant_object**>(this) =
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new variant_object(**reinterpret_cast<const const_variant_object_ptr*>(&v));
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set_variant_type( this, object_type );
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return;
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case array_type:
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*reinterpret_cast<variants**>(this) =
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new variants(**reinterpret_cast<const const_variants_ptr*>(&v));
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set_variant_type( this, array_type );
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return;
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case string_type:
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*reinterpret_cast<string**>(this) =
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new string(**reinterpret_cast<const const_string_ptr*>(&v) );
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set_variant_type( this, string_type );
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return;
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default:
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memcpy( this, &v, sizeof(v) );
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}
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}
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variant::variant( variant&& v )
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{
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memcpy( this, &v, sizeof(v) );
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set_variant_type( &v, null_type );
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}
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variant::~variant()
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{
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clear();
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}
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variant& variant::operator=( variant&& v )
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{
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if( this == &v ) return *this;
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clear();
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memcpy( (char*)this, (char*)&v, sizeof(v) );
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set_variant_type( &v, null_type );
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return *this;
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}
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variant& variant::operator=( const variant& v )
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{
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if( this == &v )
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return *this;
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clear();
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switch( v.get_type() )
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{
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case object_type:
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*reinterpret_cast<variant_object**>(this) =
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new variant_object((**reinterpret_cast<const const_variant_object_ptr*>(&v)));
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break;
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case array_type:
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*reinterpret_cast<variants**>(this) =
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new variants((**reinterpret_cast<const const_variants_ptr*>(&v)));
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break;
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case string_type:
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*reinterpret_cast<string**>(this) = new string((**reinterpret_cast<const const_string_ptr*>(&v)) );
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break;
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default:
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memcpy( this, &v, sizeof(v) );
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}
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set_variant_type( this, v.get_type() );
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return *this;
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}
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void variant::visit( const visitor& v )const
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{
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switch( get_type() )
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{
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case null_type:
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v.handle();
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return;
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case int64_type:
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v.handle( *reinterpret_cast<const int64_t*>(this) );
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return;
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case uint64_type:
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v.handle( *reinterpret_cast<const uint64_t*>(this) );
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return;
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case double_type:
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v.handle( *reinterpret_cast<const double*>(this) );
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return;
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case bool_type:
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v.handle( *reinterpret_cast<const bool*>(this) );
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return;
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case string_type:
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v.handle( **reinterpret_cast<const const_string_ptr*>(this) );
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return;
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case array_type:
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v.handle( **reinterpret_cast<const const_variants_ptr*>(this) );
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return;
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case object_type:
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v.handle( **reinterpret_cast<const const_variant_object_ptr*>(this) );
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return;
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default:
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FC_THROW_EXCEPTION( assert_exception, "Invalid Type / Corrupted Memory" );
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}
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}
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variant::type_id variant::get_type()const
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{
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return (type_id)reinterpret_cast<const char*>(this)[sizeof(*this)-1];
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}
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bool variant::is_null()const
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{
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return get_type() == null_type;
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}
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bool variant::is_string()const
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{
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return get_type() == string_type;
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}
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bool variant::is_bool()const
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{
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return get_type() == bool_type;
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}
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bool variant::is_double()const
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{
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return get_type() == double_type;
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}
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bool variant::is_uint64()const
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{
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return get_type() == uint64_type;
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}
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bool variant::is_int64()const
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{
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return get_type() == int64_type;
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}
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bool variant::is_numeric()const
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{
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switch( get_type() )
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{
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case int64_type:
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case uint64_type:
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case double_type:
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case bool_type:
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return true;
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default:
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return false;
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}
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return false;
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}
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bool variant::is_object()const
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{
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return get_type() == object_type;
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}
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bool variant::is_array()const
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{
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return get_type() == array_type;
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}
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int64_t variant::as_int64()const
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{
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switch( get_type() )
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{
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case string_type:
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return to_int64(**reinterpret_cast<const const_string_ptr*>(this));
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case double_type:
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return int64_t(*reinterpret_cast<const double*>(this));
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case int64_type:
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return *reinterpret_cast<const int64_t*>(this);
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case uint64_type:
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return int64_t(*reinterpret_cast<const uint64_t*>(this));
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case bool_type:
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return *reinterpret_cast<const bool*>(this);
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case null_type:
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return 0;
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default:
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from ${type} to int64", ("type", get_type()) );
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}
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}
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uint64_t variant::as_uint64()const
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{
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switch( get_type() )
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{
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case string_type:
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return to_uint64(**reinterpret_cast<const const_string_ptr*>(this));
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case double_type:
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return static_cast<uint64_t>(*reinterpret_cast<const double*>(this));
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case int64_type:
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return static_cast<uint64_t>(*reinterpret_cast<const int64_t*>(this));
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case uint64_type:
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return *reinterpret_cast<const uint64_t*>(this);
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case bool_type:
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return static_cast<uint64_t>(*reinterpret_cast<const bool*>(this));
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case null_type:
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return 0;
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default:
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FC_THROW_EXCEPTION( bad_cast_exception,"Invalid cast from ${type} to uint64", ("type",get_type()));
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}
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}
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double variant::as_double()const
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{
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switch( get_type() )
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{
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case string_type:
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return to_double(**reinterpret_cast<const const_string_ptr*>(this));
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case double_type:
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return *reinterpret_cast<const double*>(this);
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case int64_type:
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return static_cast<double>(*reinterpret_cast<const int64_t*>(this));
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case uint64_type:
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return static_cast<double>(*reinterpret_cast<const uint64_t*>(this));
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case bool_type:
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return *reinterpret_cast<const bool*>(this);
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case null_type:
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return 0;
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default:
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from ${type} to double", ("type",get_type()) );
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}
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}
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bool variant::as_bool()const
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{
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switch( get_type() )
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{
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case string_type:
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return **reinterpret_cast<const const_string_ptr*>(this) == "true";
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case double_type:
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return *reinterpret_cast<const double*>(this) != 0.0;
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case int64_type:
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return *reinterpret_cast<const int64_t*>(this) != 0;
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case uint64_type:
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return *reinterpret_cast<const uint64_t*>(this) != 0;
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case bool_type:
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return *reinterpret_cast<const bool*>(this);
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case null_type:
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return false;
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default:
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from ${type} to bool" , ("type",get_type()));
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}
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}
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string variant::as_string()const
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{
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switch( get_type() )
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{
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case string_type:
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return **reinterpret_cast<const const_string_ptr*>(this);
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case double_type:
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return to_string(*reinterpret_cast<const double*>(this));
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case int64_type:
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return to_string(*reinterpret_cast<const int64_t*>(this));
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case uint64_type:
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return to_string(*reinterpret_cast<const uint64_t*>(this));
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case bool_type:
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return *reinterpret_cast<const bool*>(this) ? "true" : "false";
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case null_type:
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return string();
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default:
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from ${type} to string", ("type", get_type() ) );
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}
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}
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/// @throw if get_type() != array_type | null_type
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variants& variant::get_array()
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{
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if( get_type() == array_type )
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return **reinterpret_cast<variants**>(this);
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from ${type} to Array", ("type",get_type()) );
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}
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/// @throw if get_type() != array_type
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const variants& variant::get_array()const
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{
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if( get_type() == array_type )
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return **reinterpret_cast<const const_variants_ptr*>(this);
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from ${type} to Array", ("type",get_type()) );
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}
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/// @throw if get_type() != object_type | null_type
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variant_object& variant::get_object()
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{
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if( get_type() == object_type )
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return **reinterpret_cast<variant_object**>(this);
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from ${type} to Object", ("type",get_type()) );
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}
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const variant& variant::operator[]( const char* key )const
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{
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return get_object()[key];
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}
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const variant& variant::operator[]( size_t pos )const
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{
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return get_array()[pos];
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}
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/// @pre is_array()
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size_t variant::size()const
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{
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return get_array().size();
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}
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const string& variant::get_string()const
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{
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if( get_type() == string_type )
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return **reinterpret_cast<const const_string_ptr*>(this);
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from type '${type}' to Object", ("type",get_type()) );
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}
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/// @throw if get_type() != object_type
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const variant_object& variant::get_object()const
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{
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if( get_type() == object_type )
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return **reinterpret_cast<const const_variant_object_ptr*>(this);
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FC_THROW_EXCEPTION( bad_cast_exception, "Invalid cast from type '${type}' to Object", ("type",get_type()) );
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}
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void to_variant( const std::string& s, variant& v )
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{
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v = variant( fc::string(s) );
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}
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//void from_variant( const variant& var, variant_object& vo )
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//{
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// vo = var.get_object();
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//}
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void from_variant( const variant& var, string& vo )
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{
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vo = var.as_string();
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}
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void from_variant( const variant& var, variants& vo )
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{
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vo = var.get_array();
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}
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void from_variant( const variant& var, variant& vo ) { vo = var; }
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void from_variant( const variant& var, int64_t& vo )
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{
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vo = var.as_int64();
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}
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void from_variant( const variant& var, uint64_t& vo )
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{
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vo = var.as_uint64();
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}
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|
|
|
void from_variant( const variant& var, bool& vo )
|
|
{
|
|
vo = var.as_bool();
|
|
}
|
|
|
|
void from_variant( const variant& var, double& vo )
|
|
{
|
|
vo = var.as_double();
|
|
}
|
|
|
|
void from_variant( const variant& var, float& vo )
|
|
{
|
|
vo = static_cast<float>(var.as_double());
|
|
}
|
|
|
|
void from_variant( const variant& var, int32_t& vo )
|
|
{
|
|
vo = static_cast<int32_t>(var.as_int64());
|
|
}
|
|
|
|
void to_variant( const uint32_t& var, variant& vo ) { vo = uint64_t(var); }
|
|
void from_variant( const variant& var, uint32_t& vo )
|
|
{
|
|
vo = static_cast<uint32_t>(var.as_uint64());
|
|
}
|
|
void to_variant( const uint8_t& var, variant& vo ) { vo = uint64_t(var); }
|
|
void from_variant( const variant& var, uint8_t& vo )
|
|
{
|
|
vo = static_cast<uint8_t>(var.as_uint64());
|
|
}
|
|
|
|
string format_string( const string& format, const variant_object& args )
|
|
{
|
|
stringstream ss;
|
|
size_t prev = 0;
|
|
auto next = format.find( '$' );
|
|
while( prev != size_t(string::npos) && prev < size_t(format.size()) )
|
|
{
|
|
ss << format.substr( prev, size_t(next-prev) );
|
|
|
|
// if we got to the end, return it.
|
|
if( next == size_t(string::npos) )
|
|
return ss.str();
|
|
|
|
// if we are not at the end, then update the start
|
|
prev = next + 1;
|
|
|
|
if( format[prev] == '{' )
|
|
{
|
|
// if the next char is a open, then find close
|
|
next = format.find( '}', prev );
|
|
// if we found close...
|
|
if( next != size_t(string::npos) )
|
|
{
|
|
// the key is between prev and next
|
|
string key = format.substr( prev+1, (next-prev-1) );
|
|
|
|
auto val = args.find( key );
|
|
if( val != args.end() )
|
|
{
|
|
if( val->value().is_object() || val->value().is_array() )
|
|
{
|
|
ss << json::to_string( val->value() );
|
|
}
|
|
else
|
|
{
|
|
ss << val->value().as_string();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ss << "${"<<key<<"}";
|
|
}
|
|
prev = next + 1;
|
|
// find the next $
|
|
next = format.find( '$', prev );
|
|
}
|
|
else
|
|
{
|
|
// we didn't find it.. continue to while...
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ss << format[prev];
|
|
++prev;
|
|
next = format.find( '$', prev );
|
|
}
|
|
}
|
|
return ss.str();
|
|
}
|
|
#ifdef __APPLE__
|
|
#elif !defined(_MSC_VER)
|
|
void to_variant( long long int s, variant& v ) { v = variant( int64_t(s) ); }
|
|
void to_variant( unsigned long long int s, variant& v ) { v = variant( uint16_t(s)); }
|
|
#endif
|
|
|
|
} // namespace fc
|