src/core/uuid.c

   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
  19 FILE_LICENCE ( GPL2_OR_LATER );
  20
  21 #include <stdint.h>
  22 #include <stdio.h>
  23 #include <byteswap.h>
  24 #include <gpxe/uuid.h>
  25
  26 /** @file
  27  *
  28  * Universally unique IDs
  29  *
  30  */
  31
  32 /**
  33  * Convert UUID to printable string
  34  *
  35  * @v uuid              UUID
  36  * @ret string          UUID in canonical form
  37  */
  38 char * uuid_ntoa ( union uuid *uuid ) {
  39         static char buf[37]; /* "00000000-0000-0000-0000-000000000000" */
  40
  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 }