--- /dev/null
+/* $Id: fsw_efi_lib.c 29125 2010-05-06 09:43:05Z vboxsync $ */
+/** @file
+ * fsw_efi_lib.c - EFI host environment library functions.
+ */
+
+/*
+ * Copyright (C) 2010 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+/*-
+ * 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