byteswap-16.h 1.2 KB

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  1. /* Macros to swap the order of bytes in 16-bit integer values.
  2. Copyright (C) 2012-2016 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. <http://www.gnu.org/licenses/>. */
  15. #ifndef _BITS_BYTESWAP_H
  16. # error "Never use <bits/byteswap-16.h> directly; include <byteswap.h> instead."
  17. #endif
  18. #ifdef __GNUC__
  19. # define __bswap_16(x) \
  20. (__extension__ \
  21. ({ unsigned short int __bsx = (unsigned short int) (x); \
  22. __bswap_constant_16 (__bsx); }))
  23. #else
  24. static __inline unsigned short int
  25. __bswap_16 (unsigned short int __bsx)
  26. {
  27. return __bswap_constant_16 (__bsx);
  28. }
  29. #endif