Check.hpp

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/* 
 * Check.hpp 
 *
 * Copyright (C) 2003 Thomas Seidel <thomas.seidel@univie.ac.at>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
 
#ifndef CDPL_MATH_CHECK_HPP
#define CDPL_MATH_CHECK_HPP
 
#include <algorithm>
 
#ifndef CDPL_MATH_CHECK
# ifdef CDPL_MATH_CHECKS_DISABLE
#  define CDPL_MATH_CHECK(expr, msg, e)
# else // !CDPL_MATH_CHECKS_DISABLE
#  define CDPL_MATH_CHECK(expr, msg, e) \
   if (!(expr)) {                       \
    throw e(msg);                       \
   }
# endif // CDPL_MATH_CHECKS_DISABLE
#endif // !CDPL_MATH_CHECK
 
 
namespace
{
 
    template <typename E, typename T>
    T checkSizeEquality(const T& size1, const T& size2)
    {
        CDPL_MATH_CHECK(size1 == size2, "Size mismatch", E);
        return std::min(size1, size2);
    }
 
    template <typename E, typename T>
    T checkMaxSize(const T& size, const T& max_size)
    {
        CDPL_MATH_CHECK(size <= max_size, "Max. size exceeded", E);
        return std::min(size, max_size);
    }
} // namespace
 
#define CDPL_MATH_CHECK_SIZE_EQUALITY(size1, size2, e) checkSizeEquality<e>(size1, size2)
 
#define CDPL_MATH_CHECK_MAX_SIZE(size, max_size, e) checkMaxSize<e>(size, max_size)
 
#endif // CDPL_MATH_CHECK_HPP