TryConvertWindowsIdToIanaId() [2/3]

static unsafe bool System.TimeZoneInfo.TryConvertWindowsIdToIanaId ( string windowsId, string region, bool allocate, out string ianaId )

inlinestaticprivate

Definition at line 2308 of file TimeZoneInfo.cs.

    {
        if (GlobalizationMode.Invariant || GlobalizationMode.UseNls || windowsId == null)
        {
            ianaId = null;
            return false;
        }
        if (windowsId.Equals("utc", StringComparison.OrdinalIgnoreCase))
        {
            ianaId = "Etc/UTC";
            return true;
        }
        foreach (char c in windowsId)
        {
            if (c == '\\' || c == '\n' || c == '\r')
            {
                ianaId = null;
                return false;
            }
        }
        IntPtr region2 = IntPtr.Zero;
        if (region != null && region.Length < 11)
        {
            byte* ptr = stackalloc byte[(int)(uint)(region.Length + 1)];
            int j;
            for (j = 0; j < region.Length && region[j] <= '\u007f'; j++)
            {
                ptr[j] = (((uint)(region[j] - 97) <= 25u) ? ((byte)(region[j] - 97 + 65)) : ((byte)region[j]));
            }
            if (j >= region.Length)
            {
                ptr[region.Length] = 0;
                region2 = new IntPtr(ptr);
            }
        }
        char* ptr2 = stackalloc char[100];
        int num = Interop.Globalization.WindowsIdToIanaId(windowsId, region2, ptr2, 100);
        if (num > 0)
        {
            ianaId = (allocate ? new string(ptr2, 0, num) : null);
            return true;
        }
        ianaId = null;
        return false;
    }

References System.Runtime.Serialization.Dictionary, System.Globalization.GlobalizationMode.Invariant, System.Globalization.GlobalizationMode.UseNls, Interop.Globalization.WindowsIdToIanaId(), and System.IntPtr.Zero.