integer_select.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */

#pragma once

#include <cstdint>

namespace mrpt
{
namespace utils
{
/** \addtogroup mrpt_int_select Templates to declare integers by byte count (in
 * #include <mrpt/utils/integer_select.h>)
  *  \ingroup mrpt_base_grp
  * @{ */

/** Usage: `int_select_by_bytecount<N>::type  var;` allows defining var as a
 * signed integer with, at least, N bytes. */
template <unsigned int num_bytes>
struct int_select_by_bytecount;
template <>
struct int_select_by_bytecount<1>
{
        typedef int8_t type;
};
template <>
struct int_select_by_bytecount<2>
{
        typedef int16_t type;
};
template <>
struct int_select_by_bytecount<3>
{
        typedef int32_t type;
};
template <>
struct int_select_by_bytecount<4>
{
        typedef int32_t type;
};
template <>
struct int_select_by_bytecount<8>
{
        typedef int64_t type;
};

/** Usage: `uint_select_by_bytecount<N>::type  var;` allows defining var as a
 * unsigned integer with, at least, N bytes. */
template <unsigned int num_bytes>
struct uint_select_by_bytecount;
template <>
struct uint_select_by_bytecount<1>
{
        typedef uint8_t type;
};
template <>
struct uint_select_by_bytecount<2>
{
        typedef uint16_t type;
};
template <>
struct uint_select_by_bytecount<3>
{
        typedef uint32_t type;
};
template <>
struct uint_select_by_bytecount<4>
{
        typedef uint32_t type;
};
template <>
struct uint_select_by_bytecount<8>
{
        typedef uint64_t type;
};

/** @} */
}  // End of namespace
}  // end of namespace