1 files changed, 123 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/efi/efitime.cpp b/src/VBox/Runtime/common/efi/efitime.cpp
new file mode 100644
index 00000000..a4e82b5a
--- /dev/null
+++ b/src/VBox/Runtime/common/efi/efitime.cpp
@@ -0,0 +1,123 @@
+/* $Id: efitime.cpp $ */
+/** @file
+ * IPRT - EFI time conversion helpers.
+ */
+
+/*
+ * Copyright (C) 2021-2023 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
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_TIME
+#include <iprt/efi.h>
+
+#include <iprt/cdefs.h>
+#include <iprt/string.h>
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+
+
+/*********************************************************************************************************************************
+*   Internal Functions                                                                                                           *
+*********************************************************************************************************************************/
+
+RTDECL(PRTTIMESPEC) RTEfiTimeToTimeSpec(PRTTIMESPEC pTimeSpec, PCEFI_TIME pEfiTime)
+{
+    RTTIME Time; RT_ZERO(Time);
+
+    Time.i32Year       = pEfiTime->u16Year;
+    Time.u8Month       = pEfiTime->u8Month;
+    Time.u8MonthDay    = pEfiTime->u8Day;
+    Time.u8Hour        = pEfiTime->u8Hour;
+    Time.u8Minute      = pEfiTime->u8Minute;
+    Time.u8Second      = pEfiTime->u8Second;
+    Time.u32Nanosecond = pEfiTime->u32Nanosecond;
+    if (pEfiTime->iTimezone != EFI_TIME_TIMEZONE_UNSPECIFIED)
+        Time.offUTC = pEfiTime->iTimezone;
+    Time.fFlags = RTTIME_FLAGS_TYPE_LOCAL;
+    if (RTTimeIsLeapYear(Time.i32Year))
+        Time.fFlags |= RTTIME_FLAGS_LEAP_YEAR;
+    else
+        Time.fFlags |= RTTIME_FLAGS_COMMON_YEAR;
+    if (pEfiTime->u8Daylight & EFI_TIME_DAYLIGHT_ADJUST)
+    {
+        if (pEfiTime->u8Daylight & EFI_TIME_DAYLIGHT_INDST)
+            Time.fFlags |= RTTIME_FLAGS_DST;
+    }
+    else
+        Time.fFlags |= RTTIME_FLAGS_NO_DST_DATA;
+
+    if (!RTTimeLocalNormalize(&Time))
+        return NULL;
+
+    return RTTimeImplode(pTimeSpec, &Time);
+}
+
+
+RTDECL(PEFI_TIME) RTEfiTimeFromTimeSpec(PEFI_TIME pEfiTime, PCRTTIMESPEC pTimeSpec)
+{
+    RTTIME Time; RT_ZERO(Time);
+    if (!RTTimeExplode(&Time, pTimeSpec))
+        return NULL;
+
+    RT_ZERO(*pEfiTime);
+    pEfiTime->u16Year       =   Time.i32Year < 0
+                              ? 0
+                              : (uint16_t)Time.i32Year;
+    pEfiTime->u8Month       = Time.u8Month;
+    pEfiTime->u8Day         = Time.u8MonthDay;
+    pEfiTime->u8Hour        = Time.u8Hour;
+    pEfiTime->u8Minute      = Time.u8Minute;
+    pEfiTime->u8Second      = Time.u8Second;
+    pEfiTime->u32Nanosecond = Time.u32Nanosecond;
+    if ((Time.fFlags & RTTIME_FLAGS_TYPE_MASK) == RTTIME_FLAGS_TYPE_LOCAL)
+        pEfiTime->iTimezone = Time.offUTC;
+    else
+        pEfiTime->iTimezone = EFI_TIME_TIMEZONE_UNSPECIFIED;
+    if (!(Time.fFlags & RTTIME_FLAGS_NO_DST_DATA))
+    {
+        pEfiTime->u8Daylight = EFI_TIME_DAYLIGHT_ADJUST;
+        if (Time.fFlags & RTTIME_FLAGS_DST)
+            pEfiTime->u8Daylight |= EFI_TIME_DAYLIGHT_INDST;
+    }
+    return pEfiTime;
+}
+