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/* $Id: fsw_efi_lib.c $ */
/** @file
* fsw_efi_lib.c - EFI host environment library functions.
*/
/*
* Copyright (C) 2010-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
* ---------------------------------------------------------------------------
* This code is based on:
*
* Copyright (c) 2006 Christoph Pfisterer
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Christoph Pfisterer nor the names of the
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "fsw_efi.h"
//
// time conversion
//
// Adopted from public domain code in FreeBSD libc.
//
#define SECSPERMIN 60
#define MINSPERHOUR 60
#define HOURSPERDAY 24
#define DAYSPERWEEK 7
#define DAYSPERNYEAR 365
#define DAYSPERLYEAR 366
#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
#define MONSPERYEAR 12
#define EPOCH_YEAR 1970
#define EPOCH_WDAY TM_THURSDAY
#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
static const int mon_lengths[2][MONSPERYEAR] = {
{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
};
static const int year_lengths[2] = {
DAYSPERNYEAR, DAYSPERLYEAR
};
VOID fsw_efi_decode_time(OUT EFI_TIME *EfiTime, IN UINT32 UnixTime)
{
long days, rem;
int y, newy, yleap;
const int *ip;
ZeroMem(EfiTime, sizeof(EFI_TIME));
days = UnixTime / SECSPERDAY;
rem = UnixTime % SECSPERDAY;
EfiTime->Hour = (UINT8) (rem / SECSPERHOUR);
rem = rem % SECSPERHOUR;
EfiTime->Minute = (UINT8) (rem / SECSPERMIN);
EfiTime->Second = (UINT8) (rem % SECSPERMIN);
y = EPOCH_YEAR;
while (days < 0 || days >= (long) year_lengths[yleap = isleap(y)]) {
newy = y + days / DAYSPERNYEAR;
if (days < 0)
--newy;
days -= (newy - y) * DAYSPERNYEAR +
LEAPS_THRU_END_OF(newy - 1) -
LEAPS_THRU_END_OF(y - 1);
y = newy;
}
EfiTime->Year = (UINT16)y;
ip = mon_lengths[yleap];
for (EfiTime->Month = 0; days >= (long) ip[EfiTime->Month]; ++(EfiTime->Month))
days = days - (long) ip[EfiTime->Month];
EfiTime->Month++; // adjust range to EFI conventions
EfiTime->Day = (UINT8) (days + 1);
}
//
// String functions, used for file and volume info
//
UINTN fsw_efi_strsize(struct fsw_string *s)
{
if (s->type == FSW_STRING_TYPE_EMPTY)
return sizeof(CHAR16);
return (s->len + 1) * sizeof(CHAR16);
}
VOID fsw_efi_strcpy(CHAR16 *Dest, struct fsw_string *src)
{
if (src->type == FSW_STRING_TYPE_EMPTY) {
Dest[0] = 0;
} else if (src->type == FSW_STRING_TYPE_UTF16) {
CopyMem(Dest, src->data, src->size);
Dest[src->len] = 0;
} else {
/// @todo coerce, recurse
Dest[0] = 0;
}
}
#ifdef VBOX
int fsw_streq_ISO88591_UTF16(void *s1data, void *s2data, int len)
{
int i;
fsw_u8 *p1 = (fsw_u8 *)s1data;
fsw_u16 *p2 = (fsw_u16 *)s2data;
for (i = 0; i<len; i++)
{
if (fsw_to_lower(p1[i]) != fsw_to_lower(p2[i]))
{
return 0;
}
}
return 1;
}
#endif
// EOF
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