iPXE
uuid.c
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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., 51 Franklin Street, Fifth Floor, Boston, MA
00017  * 02110-1301, USA.
00018  *
00019  * You can also choose to distribute this program under the terms of
00020  * the Unmodified Binary Distribution Licence (as given in the file
00021  * COPYING.UBDL), provided that you have satisfied its requirements.
00022  */
00023 
00024 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
00025 
00026 #include <stdint.h>
00027 #include <stdio.h>
00028 #include <byteswap.h>
00029 #include <ipxe/uuid.h>
00030 
00031 /** @file
00032  *
00033  * Universally unique IDs
00034  *
00035  */
00036 
00037 /**
00038  * Convert UUID to printable string
00039  *
00040  * @v uuid              UUID
00041  * @ret string          UUID in canonical form
00042  */
00043 const char * uuid_ntoa ( const union uuid *uuid ) {
00044         static char buf[37]; /* "00000000-0000-0000-0000-000000000000" */
00045 
00046         sprintf ( buf, "%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
00047                   be32_to_cpu ( uuid->canonical.a ),
00048                   be16_to_cpu ( uuid->canonical.b ),
00049                   be16_to_cpu ( uuid->canonical.c ),
00050                   be16_to_cpu ( uuid->canonical.d ),
00051                   uuid->canonical.e[0], uuid->canonical.e[1],
00052                   uuid->canonical.e[2], uuid->canonical.e[3],
00053                   uuid->canonical.e[4], uuid->canonical.e[5] );
00054         return buf;
00055 }