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/*

 * Copyright (c) 2005 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/** @addtogroup libc

 * @{

 */

/** @file

 */

#ifndef LIBC_BYTEORDER_H_

#define LIBC_BYTEORDER_H_

#include <stdint.h>

#if !(defined(__BE__) ^ defined(__LE__))

    #error The architecture must be either big-endian or little-endian.

#endif

#ifdef __BE__

#define uint16_t_le2host(n)  (uint16_t_byteorder_swap(n))

#define uint32_t_le2host(n)  (uint32_t_byteorder_swap(n))

#define uint64_t_le2host(n)  (uint64_t_byteorder_swap(n))

#define uint16_t_be2host(n)  (n)

#define uint32_t_be2host(n)  (n)

#define uint64_t_be2host(n)  (n)

#define host2uint16_t_le(n)  (uint16_t_byteorder_swap(n))

#define host2uint32_t_le(n)  (uint32_t_byteorder_swap(n))

#define host2uint64_t_le(n)  (uint64_t_byteorder_swap(n))

#define host2uint16_t_be(n)  (n)

#define host2uint32_t_be(n)  (n)

#define host2uint64_t_be(n)  (n)

#else

#define uint16_t_le2host(n)  (n)

#define uint32_t_le2host(n)  (n)

#define uint64_t_le2host(n)  (n)

#define uint16_t_be2host(n)  (uint16_t_byteorder_swap(n))

#define uint32_t_be2host(n)  (uint32_t_byteorder_swap(n))

#define uint64_t_be2host(n)  (uint64_t_byteorder_swap(n))

#define host2uint16_t_le(n)  (n)

#define host2uint32_t_le(n)  (n)

#define host2uint64_t_le(n)  (n)

#define host2uint16_t_be(n)  (uint16_t_byteorder_swap(n))

#define host2uint32_t_be(n)  (uint32_t_byteorder_swap(n))

#define host2uint64_t_be(n)  (uint64_t_byteorder_swap(n))

#endif

static inline uint64_t uint64_t_byteorder_swap(uint64_t n)

{

    return ((n & 0xff) << 56) |

        ((n & 0xff00) << 40) |

        ((n & 0xff0000) << 24) |

        ((n & 0xff000000LL) << 8) |

        ((n & 0xff00000000LL) >> 8) |

        ((n & 0xff0000000000LL) >> 24) |

        ((n & 0xff000000000000LL) >> 40) |

        ((n & 0xff00000000000000LL) >> 56);

}

static inline uint32_t uint32_t_byteorder_swap(uint32_t n)

{

    return ((n & 0xff) << 24) |

        ((n & 0xff00) << 8) |

        ((n & 0xff0000) >> 8) |

        ((n & 0xff000000) >> 24);

}

static inline uint16_t uint16_t_byteorder_swap(uint16_t n)

{

    return ((n & 0xff) << 8) |

        ((n & 0xff00) >> 8);

}

#endif

/** @}

 */