IpcMessage.cpp

/******************************************************************************
IPC - Simple cross-platform C++ IPC library
Copyright (c) 2024, Marcus Tomlinson

BSD 2-Clause License

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modification, are permitted provided that the following conditions are met:

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******************************************************************************/

#include <IpcMessage.h>

using namespace Ipc;

namespace Ipc::Private
{

class MessageImpl
{
public:
    MessageImpl( unsigned char* message, size_t length )
        : size( length )
        , asRaw( message )
    {
    }

    explicit MessageImpl( const std::vector<unsigned char>& message )
    {
        size = message.size();
        if ( size > 0 )
        {
            asByteVect = message;
            asRaw = static_cast<unsigned char*>( &asByteVect[0] );
        }
    }

    MessageImpl( const std::string& message, bool isError )
        : isError( isError )
    {
        size = message.size();
        if ( size > 0 )
        {
            asString = message;
            asRaw = reinterpret_cast<unsigned char*>( &asString[0] );
        }
    }

    const std::string& AsString() const
    {
        if ( size > 0 && asString.empty() )
        {
            const_cast<MessageImpl*>( this )->asString = std::string( reinterpret_cast<const char*>( asRaw ), size );
        }

        return asString;
    }

    const std::vector<unsigned char>& AsByteVect() const
    {
        if ( size > 0 && asByteVect.empty() )
        {
            const_cast<MessageImpl*>( this )->asByteVect = std::vector<unsigned char>( asRaw, asRaw + size );
        }

        return asByteVect;
    }

    bool isError = false;

    size_t size = 0;
    unsigned char* asRaw = nullptr;

    std::vector<unsigned char> asByteVect;
    std::string asString;
};

}  // namespace Ipc::Private

Message::Message( unsigned char* message, size_t length )
    : p( std::make_unique<Private::MessageImpl>( message, length ) )
{
}

Message::Message( const std::vector<unsigned char>& message )
    : p( std::make_unique<Private::MessageImpl>( message ) )
{
}

Message::Message( const std::string& message, bool isError )
    : p( std::make_unique<Private::MessageImpl>( message, isError ) )
{
}

Message::~Message()
{
}

bool Message::IsError() const
{
    return p->isError;
}

size_t Message::Size() const
{
    return p->size;
}

const unsigned char* Message::AsRaw() const
{
    return p->asRaw;
}

const std::string& Message::AsString() const
{
    return p->AsString();
}

const std::vector<unsigned char>& Message::AsByteVect() const
{
    return p->AsByteVect();
}