text: /*
   * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
   *
   * SPDX-License-Identifier: BSD-2-Clause
   */
  
  #pragma once
  
  #include <sys/cdefs.h>
  
  __BEGIN_DECLS
  
  #define __LITTLE_ENDIAN 1234
  #define __BIG_ENDIAN 4321
  #define __PDP_ENDIAN 3412
  
  #if defined(__GNUC__) && defined(__BYTE_ORDER__)
  #    define __BYTE_ORDER __BYTE_ORDER__
  #else
  #    include <bits/endian.h>
  #endif
  
  #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
  
  #    include <stdint.h>
  
  static __inline uint16_t __bswap16(uint16_t x)
  {
      return __builtin_bswap16(x);
  }
  
  static __inline uint32_t __bswap32(uint32_t x)
  {
      return __builtin_bswap32(x);
  }
  
  static __inline uint64_t __bswap64(uint64_t x)
  {
      return __builtin_bswap64(x);
  }
  
  #    define LITTLE_ENDIAN __LITTLE_ENDIAN
  #    define BIG_ENDIAN __BIG_ENDIAN
  #    define PDP_ENDIAN __PDP_ENDIAN
  #    define BYTE_ORDER __BYTE_ORDER
  
  #    if __BYTE_ORDER == __LITTLE_ENDIAN
  #        define htole16(x) ((uint16_t)(x))
  #        define le16toh(x) ((uint16_t)(x))
  #        define letoh16(x) ((uint16_t)(x))
  #        define htole32(x) ((uint32_t)(x))
  #        define le32toh(x) ((uint32_t)(x))
  #        define letoh32(x) ((uint32_t)(x))
  #        define htole64(x) ((uint64_t)(x))
  #        define le64toh(x) ((uint64_t)(x))
  #        define letoh64(x) ((uint64_t)(x))
  #        define htobe16(x) (__builtin_bswap16(x))
  #        define be16toh(x) (__builtin_bswap16(x))
  #        define betoh16(x) (__builtin_bswap16(x))
  #        define htobe32(x) (__builtin_bswap32(x))
  #        define be32toh(x) (__builtin_bswap32(x))
  #        define betoh32(x) (__builtin_bswap32(x))
  #        define htobe64(x) (__builtin_bswap64(x))
  #        define be64toh(x) (__builtin_bswap64(x))
  #        define betoh64(x) (__builtin_bswap64(x))
  #    else
  #        define htole16(x) (__builtin_bswap16(x))
  #        define le16toh(x) (__builtin_bswap16(x))
  #        define letoh16(x) (__builtin_bswap16(x))
  #        define htole32(x) (__builtin_bswap32(x))
  #        define le32toh(x) (__builtin_bswap32(x))
  #        define letoh32(x) (__builtin_bswap32(x))
  #        define htole64(x) (__builtin_bswap64(x))
  #        define le64toh(x) (__builtin_bswap64(x))
  #        define letoh64(x) (__builtin_bswap64(x))
  #        define htobe16(x) ((uint16_t)(x))
  #        define be16toh(x) ((uint16_t)(x))
  #        define betoh16(x) ((uint16_t)(x))
  #        define htobe32(x) ((uint32_t)(x))
  #        define be32toh(x) ((uint32_t)(x))
  #        define betoh32(x) ((uint32_t)(x))
  #        define htobe64(x) ((uint64_t)(x))
  #        define be64toh(x) ((uint64_t)(x))
  #        define betoh64(x) ((uint64_t)(x))
  #    endif
  
  #endif
  
  __END_DECLS
  