messageappenditerator.h

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// SPDX-License-Identifier: LGPL-3.0-or-later OR BSD-3-Clause
/***************************************************************************
 *   Copyright (C) 2009,2010 by Rick L. Vinyard, Jr.                       *
 *   rvinyard@cs.nmsu.edu                                                  *
 *                                                                         *
 *   This file is part of the dbus-cxx library.                            *
 ***************************************************************************/
#include <stdint.h>
#include <dbus-cxx/enums.h>
#include <dbus-cxx/signature.h>
#include <dbus-cxx/marshaling.h>
#include <dbus-cxx/dbus-cxx-config.h>
#include <stddef.h>
#include <map>
#include <memory>
#include <string>
#include <tuple>
#include <vector>
#include "error.h"
#include "path.h"
#include "variant.h"
 
#ifndef DBUSCXX_MESSAGEAPPENDITERATOR_H
#define DBUSCXX_MESSAGEAPPENDITERATOR_H
 
namespace DBus {
 
class FileDescriptor;
class Message;
 
class MessageAppendIterator {
public:
 
    MessageAppendIterator( ContainerType container = ContainerType::None );
 
    MessageAppendIterator( Message& message, ContainerType container = ContainerType::None );
 
    MessageAppendIterator( std::shared_ptr<Message> message, ContainerType container = ContainerType::None );
 
    ~MessageAppendIterator();
 
    const Message* message() const;
 
    void invalidate();
 
    bool is_valid() const;
 
    operator bool() const;
 
    MessageAppendIterator& operator<<( const bool& v );
    MessageAppendIterator& operator<<( const uint8_t& v );
    MessageAppendIterator& operator<<( const int16_t& v );
    MessageAppendIterator& operator<<( const uint16_t& v );
    MessageAppendIterator& operator<<( const int32_t& v );
    MessageAppendIterator& operator<<( const uint32_t& v );
    MessageAppendIterator& operator<<( const int64_t& v );
    MessageAppendIterator& operator<<( const uint64_t& v );
    MessageAppendIterator& operator<<( const double& v );
    MessageAppendIterator& operator<<( const char* v );
    MessageAppendIterator& operator<<( const std::string& v );
    MessageAppendIterator& operator<<( const Signature& v );
    MessageAppendIterator& operator<<( const Path& v );
    MessageAppendIterator& operator<<( const std::shared_ptr<FileDescriptor> v );
    MessageAppendIterator& operator<<( const Variant& v );
 
    template<typename ... T>
    MessageAppendIterator& operator<<( const MultipleReturn<T...>& v ) {
        std::string signature = signature_multiple_return_data(v);
        std::apply( [this]( auto&& ...arg ) mutable {
                        ( *this << ... << arg );
                    },
                    v.m_data );
 
        return *this;
    }
 
    template <typename T>
    MessageAppendIterator& operator<<( const std::vector<T>& v ) {
        bool success;
        T type {};
 
        success = this->open_container( ContainerType::ARRAY, DBus::signature( type ) );
 
        if( !success ) {
            throw ErrorNoMemory();
        }
 
        for( size_t i = 0; i < v.size(); i++ ) {
            *sub_iterator() << v[i];
        }
 
        success = this->close_container();
 
        if( !success ) {
            throw ErrorNoMemory();
        }
 
        return *this;
    }
 
    template <typename Key, typename Data>
    MessageAppendIterator& operator<<( const std::map<Key, Data>& dictionary ) {
        std::string sig = signature_dict_data( dictionary );
        typename std::map<Key, Data>::const_iterator it;
        this->open_container( ContainerType::ARRAY, sig );
 
        for( it = dictionary.begin(); it != dictionary.end(); it++ ) {
            sub_iterator()->open_container( ContainerType::DICT_ENTRY, std::string() );
            *( sub_iterator()->sub_iterator() ) << it->first;
            *( sub_iterator()->sub_iterator() ) << it->second;
            sub_iterator()->close_container();
        }
 
        this->close_container();
 
        return *this;
    }
 
    template <typename... T>
    MessageAppendIterator& operator<<( const std::tuple<T...>& tup ) {
        bool success;
        std::string signature = DBus::priv::dbus_signature<T...>().dbus_sig();
        success = this->open_container( ContainerType::STRUCT, signature.c_str() );
        MessageAppendIterator* subiter = sub_iterator();
        std::apply( [subiter]( auto&& ...arg ) mutable {
            ( *subiter << ... << arg );
        },
        tup );
        this->close_container();
 
        return *this;
    }
 
private:
    bool open_container( ContainerType t, const std::string& contained_signature );
 
    bool close_container( );
 
    MessageAppendIterator* sub_iterator();
 
private:
    class priv_data;
 
    std::shared_ptr<priv_data> m_priv;
};
 
}
 
#endif