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uuid.c 1.7KB

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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., 51 Franklin Street, Fifth Floor, Boston, MA
  17. * 02110-1301, USA.
  18. *
  19. * You can also choose to distribute this program under the terms of
  20. * the Unmodified Binary Distribution Licence (as given in the file
  21. * COPYING.UBDL), provided that you have satisfied its requirements.
  22. */
  23. FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  24. #include <stdint.h>
  25. #include <stdio.h>
  26. #include <byteswap.h>
  27. #include <ipxe/uuid.h>
  28. /** @file
  29. *
  30. * Universally unique IDs
  31. *
  32. */
  33. /**
  34. * Convert UUID to printable string
  35. *
  36. * @v uuid UUID
  37. * @ret string UUID in canonical form
  38. */
  39. char * uuid_ntoa ( const union uuid *uuid ) {
  40. static char buf[37]; /* "00000000-0000-0000-0000-000000000000" */
  41. sprintf ( buf, "%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
  42. be32_to_cpu ( uuid->canonical.a ),
  43. be16_to_cpu ( uuid->canonical.b ),
  44. be16_to_cpu ( uuid->canonical.c ),
  45. be16_to_cpu ( uuid->canonical.d ),
  46. uuid->canonical.e[0], uuid->canonical.e[1],
  47. uuid->canonical.e[2], uuid->canonical.e[3],
  48. uuid->canonical.e[4], uuid->canonical.e[5] );
  49. return buf;
  50. }