GuidPrefix_t.hpp

// Copyright 2016-2019 Proyectos y Sistemas de Mantenimiento SL (eProsima).
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

 
#ifndef FASTDDS_RTPS_COMMON__GUIDPREFIX_T_HPP
#define FASTDDS_RTPS_COMMON__GUIDPREFIX_T_HPP
 
#include <fastdds/fastdds_dll.hpp>
#include <fastdds/rtps/common/Types.hpp>
 
#include <cstdint>
#include <cstring>
#include <sstream>
#include <iomanip>
 
namespace eprosima {
namespace fastdds {
namespace rtps {

struct FASTDDS_EXPORTED_API GuidPrefix_t
{
    static constexpr unsigned int size = 12;
    octet value[size];

    GuidPrefix_t()
    {
        memset(value, 0, size);
    }

    bool is_on_same_host_as(
            const GuidPrefix_t& other_guid_prefix) const;

    bool is_from_this_host() const;

    bool is_on_same_process_as(
            const GuidPrefix_t& other_guid_prefix) const;

    bool is_from_this_process() const;
 
    static GuidPrefix_t unknown()
    {
        return GuidPrefix_t();
    }
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS_PUBLIC

    bool operator ==(
            const GuidPrefix_t& prefix) const
    {
        return (memcmp(value, prefix.value, size) == 0);
    }

    bool operator !=(
            const GuidPrefix_t& prefix) const
    {
        return (memcmp(value, prefix.value, size) != 0);
    }

    bool operator <(
            const GuidPrefix_t& prefix) const
    {
        return std::memcmp(value, prefix.value, size) < 0;
    }

    static int cmp(
            const GuidPrefix_t& prefix1,
            const GuidPrefix_t& prefix2)
    {
        return std::memcmp(prefix1.value, prefix2.value, size);
    }
 
#endif // ifndef DOXYGEN_SHOULD_SKIP_THIS_PUBLIC
};
 
const GuidPrefix_t c_GuidPrefix_Unknown;
 
inline std::ostream& operator <<(
        std::ostream& output,
        const GuidPrefix_t& guiP)
{
    std::stringstream ss;
    ss << std::hex;
    char old_fill = ss.fill('0');
    for (uint8_t i = 0; i < 11; ++i)
    {
        ss << std::setw(2) << (int)guiP.value[i] << ".";
    }
    ss << std::setw(2) << (int)guiP.value[11];
    ss.fill(old_fill);
    ss << std::dec;
    return output << ss.str();
}
 
inline std::istream& operator >>(
        std::istream& input,
        GuidPrefix_t& guiP)
{
    std::istream::sentry s(input);
 
    if (s)
    {
        char point;
        unsigned short hex;
        std::ios_base::iostate excp_mask = input.exceptions();
 
        try
        {
            input.exceptions(excp_mask | std::ios_base::failbit | std::ios_base::badbit);
            input >> std::hex >> hex;
 
            if (hex > 255)
            {
                input.setstate(std::ios_base::failbit);
            }
 
            guiP.value[0] = static_cast<octet>(hex);
 
            for (int i = 1; i < 12; ++i)
            {
                input >> point >> hex;
                if ( point != '.' || hex > 255 )
                {
                    input.setstate(std::ios_base::failbit);
                }
                guiP.value[i] = static_cast<octet>(hex);
            }
 
            input >> std::dec;
        }
        catch (std::ios_base::failure& )
        {
            guiP = GuidPrefix_t::unknown();
        }
 
        input.exceptions(excp_mask);
    }
 
    return input;
}
 
} // namespace rtps
} // namespace fastdds
} // namespace eprosima
 
#endif // FASTDDS_RTPS_COMMON__GUIDPREFIX_T_HPP