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uuid.c 1.5KB

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  1. /*
  2. * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
  3. *
  4. * This program is free software; you can redistribute it and/or
  5. * modify it under the terms of the GNU General Public License as
  6. * published by the Free Software Foundation; either version 2 of the
  7. * License, or any later version.
  8. *
  9. * This program is distributed in the hope that it will be useful, but
  10. * WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. * General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU General Public License
  15. * along with this program; if not, write to the Free Software
  16. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17. */
  18. FILE_LICENCE ( GPL2_OR_LATER );
  19. #include <stdint.h>
  20. #include <stdio.h>
  21. #include <byteswap.h>
  22. #include <ipxe/uuid.h>
  23. /** @file
  24. *
  25. * Universally unique IDs
  26. *
  27. */
  28. /**
  29. * Convert UUID to printable string
  30. *
  31. * @v uuid UUID
  32. * @ret string UUID in canonical form
  33. */
  34. char * uuid_ntoa ( union uuid *uuid ) {
  35. static char buf[37]; /* "00000000-0000-0000-0000-000000000000" */
  36. sprintf ( buf, "%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
  37. be32_to_cpu ( uuid->canonical.a ),
  38. be16_to_cpu ( uuid->canonical.b ),
  39. be16_to_cpu ( uuid->canonical.c ),
  40. be16_to_cpu ( uuid->canonical.d ),
  41. uuid->canonical.e[0], uuid->canonical.e[1],
  42. uuid->canonical.e[2], uuid->canonical.e[3],
  43. uuid->canonical.e[4], uuid->canonical.e[5] );
  44. return buf;
  45. }