error.hpp

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/*
 * Copyright © 2018 Max Mazurov (fox.cpp) <fox.cpp [at] disroot [dot] org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#pragma once

#include <system_error>

/*
 * If you had to open this file to find answer for your question - we are so
 * sorry. Please open issue with your question so we can update documentation
 * to answer it.
 */

namespace libwire::error {
    enum class generic : int8_t {
        // Implementation note:
        //  Negative enum values forced to ensure
        //  no collisions with other codes.

        no_destination = -1,

        no_resources = -2,

        disconnected = -3,
    };

    enum system_condition : uint8_t {
        success = 0,

        unknown = 255,

        unexpected = 254,

        invalid_argument = 1,

        permission_denied,

        operation_not_permitted,

        try_again,

        in_progress,

        already,

        interrupted,

        out_of_memory,

        process_limit_reached,

        system_limit_reached,

        protocol_not_supported,

        connection_refused,

        connection_reset,

        broken_pipe,

        shutdown,

        already_in_use,

        address_not_available,

        connection_aborted,

        network_unreachable,

        host_down,

        host_unreachable,

        timeout,

        not_connected,

        end_of_file,
    };

    enum dns_condition {
        host_not_found,

        host_not_found_try_again,

        no_address,
    };

    std::error_condition make_error_condition(generic);
    std::error_condition make_error_condition(system_condition);
    std::error_condition make_error_condition(dns_condition);

    std::error_category& dns_category();

    std::error_category& system_category();
} // namespace libwire::error

namespace std {
    template<>
    struct is_error_condition_enum<libwire::error::generic> : true_type {};

    template<>
    struct is_error_condition_enum<libwire::error::system_condition> : true_type {};

    template<>
    struct is_error_condition_enum<libwire::error::dns_condition> : true_type {};
} // namespace std