efi_strerror.c

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00001 /*
00002  * Copyright (C) 2008 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 <stdio.h>
00022 #include <gpxe/efi/efi.h>
00023 
00024 /** @file
00025  *
00026  * gPXE error message formatting for EFI
00027  *
00028  */
00029 
00030 /**
00031  * Format EFI status code
00032  *
00033  * @v efirc             EFI status code
00034  * @v efi_strerror      EFI status code string
00035  */
00036 const char * efi_strerror ( EFI_STATUS efirc ) {
00037         static char errbuf[32];
00038 
00039         if ( ! efirc )
00040                 return "No error";
00041 
00042         snprintf ( errbuf, sizeof ( errbuf ), "Error %lld",
00043                    ( unsigned long long ) ( efirc ^ MAX_BIT ) );
00044         return errbuf;
00045 }