uuid.c

Go to the documentation of this file.
00001 /*
00002  * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License as
00006  * published by the Free Software Foundation; either version 2 of the
00007  * License, or any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017  */
00018 
00019 FILE_LICENCE ( GPL2_OR_LATER );
00020 
00021 #include <stdint.h>
00022 #include <stdio.h>
00023 #include <byteswap.h>
00024 #include <gpxe/uuid.h>
00025 
00026 /** @file
00027  *
00028  * Universally unique IDs
00029  *
00030  */
00031 
00032 /**
00033  * Convert UUID to printable string
00034  *
00035  * @v uuid              UUID
00036  * @ret string          UUID in canonical form
00037  */
00038 char * uuid_ntoa ( union uuid *uuid ) {
00039         static char buf[37]; /* "00000000-0000-0000-0000-000000000000" */
00040 
00041         sprintf ( buf, "%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
00042                   be32_to_cpu ( uuid->canonical.a ),
00043                   be16_to_cpu ( uuid->canonical.b ),
00044                   be16_to_cpu ( uuid->canonical.c ),
00045                   be16_to_cpu ( uuid->canonical.d ),
00046                   uuid->canonical.e[0], uuid->canonical.e[1],
00047                   uuid->canonical.e[2], uuid->canonical.e[3],
00048                   uuid->canonical.e[4], uuid->canonical.e[5] );
00049         return buf;
00050 }