byteswap.h 1.4 KB

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  1. /* Swap byte order for 16, 32 and 64 bit values
  2. Copyright (C) 1997-2021 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <https://www.gnu.org/licenses/>. */
  15. #ifndef _BYTESWAP_H
  16. #define _BYTESWAP_H 1
  17. #include <features.h>
  18. /* Get the machine specific, optimized definitions. */
  19. #include <bits/byteswap.h>
  20. /* The following definitions must all be macros, otherwise some
  21. of the possible optimizations are not possible. */
  22. /* Return a value with both bytes in the 16 bit argument swapped. */
  23. #define bswap_16(x) __bswap_16 (x)
  24. /* Return a value with all bytes in the 32 bit argument swapped. */
  25. #define bswap_32(x) __bswap_32 (x)
  26. /* Return a value with all bytes in the 64 bit argument swapped. */
  27. #define bswap_64(x) __bswap_64 (x)
  28. #endif /* byteswap.h */