// ********************************************************* -*- C++ -*-

/*

 * Copyright (C) 2004-2018 Exiv2 authors

 * This program is part of the Exiv2 distribution.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.

 */

/*!

  @file    enforce.hpp

  @brief   Port of D's enforce() to C++ & Exiv2

  @author  Dan Čermák (D4N)

           dan.cermak@cgc-instruments.com

  @date    11-March-18, D4N: created

 */

#include <string>

#include "error.hpp"

/*!

 * @brief Ensure that condition is true, otherwise throw an exception of the

 * type exception_t

 *

 * @tparam exception_t  Exception type that is thrown, must provide a

 * constructor that accepts a single argument to which arg1 is forwarded.

 *

 * @todo once we have C++>=11 use variadic templates and std::forward to remove

 * all overloads of enforce

 */

template <typename exception_t, typename T>

inline void enforce(bool condition, const T& arg1)

{

    if (!condition) {

        throw exception_t(arg1);

    }

}

/*!

 * @brief Ensure that condition is true, otherwise throw an Exiv2::Error with

 * the given error_code.

 */

inline void enforce(bool condition, Exiv2::ErrorCode err_code)

{

    if (!condition) {

        throw Exiv2::Error(err_code);

    }

}

/*!

 * @brief Ensure that condition is true, otherwise throw an Exiv2::Error with

 * the given error_code & arg1.

 */

template <typename T>

inline void enforce(bool condition, Exiv2::ErrorCode err_code, const T& arg1)

{

    if (!condition) {

        throw Exiv2::Error(err_code, arg1);

    }

}

/*!

 * @brief Ensure that condition is true, otherwise throw an Exiv2::Error with

 * the given error_code, arg1 & arg2.

 */

template <typename T, typename U>

inline void enforce(bool condition, Exiv2::ErrorCode err_code, const T& arg1, const U& arg2)

{

    if (!condition) {

        throw Exiv2::Error(err_code, arg1, arg2);

    }

}

/*!

 * @brief Ensure that condition is true, otherwise throw an Exiv2::Error with

 * the given error_code, arg1, arg2 & arg3.

 */

template <typename T, typename U, typename V>

inline void enforce(bool condition, Exiv2::ErrorCode err_code, const T& arg1, const U& arg2, const V& arg3)

{

    if (!condition) {

        throw Exiv2::Error(err_code, arg1, arg2, arg3);

    }

}