htonl.c 1.0 KB

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  1. /* Copyright (C) 1993-2026 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, see
  13. <https://www.gnu.org/licenses/>. */
  14. #include <stdint.h>
  15. #include <netinet/in.h>
  16. #undef htonl
  17. #undef ntohl
  18. uint32_t
  19. htonl (uint32_t x)
  20. {
  21. #if BYTE_ORDER == BIG_ENDIAN
  22. return x;
  23. #elif BYTE_ORDER == LITTLE_ENDIAN
  24. return __bswap_32 (x);
  25. #else
  26. # error "What kind of system is this?"
  27. #endif
  28. }
  29. weak_alias (htonl, ntohl)