Renci.SshNet.Common.SshDataStream.ReadUInt64 C# (CSharp) Method

        public ulong ReadUInt64()
        {
            var data = ReadBytes(8);
            return ((ulong) data[0] << 56 | (ulong) data[1] << 48 | (ulong) data[2] << 40 | (ulong) data[3] << 32 |
                    (ulong) data[4] << 24 | (ulong) data[5] << 16 | (ulong) data[6] << 8 | data[7]);
        }

        internal static SftpFileAttributes FromBytes(SshDataStream stream)
        {
            var flag = stream.ReadUInt32();

            long size = -1;
            var userId = -1;
            var groupId = -1;
            uint permissions = 0;
            var accessTime = DateTime.MinValue;
            var modifyTime = DateTime.MinValue;
            IDictionary<string, string> extensions = null;

            if ((flag & 0x00000001) == 0x00000001)   //  SSH_FILEXFER_ATTR_SIZE
            {
                size = (long) stream.ReadUInt64();
            }

            if ((flag & 0x00000002) == 0x00000002)   //  SSH_FILEXFER_ATTR_UIDGID
            {
                userId = (int) stream.ReadUInt32();

                groupId = (int) stream.ReadUInt32();
            }

            if ((flag & 0x00000004) == 0x00000004)   //  SSH_FILEXFER_ATTR_PERMISSIONS
            {
                permissions = stream.ReadUInt32();
            }

            if ((flag & 0x00000008) == 0x00000008)   //  SSH_FILEXFER_ATTR_ACMODTIME
            {
                var time = stream.ReadUInt32();
                accessTime = DateTime.FromFileTime((time + 11644473600) * 10000000);
                time = stream.ReadUInt32();
                modifyTime = DateTime.FromFileTime((time + 11644473600) * 10000000);
            }

            if ((flag & 0x80000000) == 0x80000000)   //  SSH_FILEXFER_ATTR_EXTENDED
            {
                var extendedCount = (int) stream.ReadUInt32();
                extensions = new Dictionary<string, string>(extendedCount);
                for (var i = 0; i < extendedCount; i++)
                {
                    var extensionName = stream.ReadString(SshData.Utf8);
                    var extensionData = stream.ReadString(SshData.Utf8);
                    extensions.Add(extensionName, extensionData);
                }
            }

            return new SftpFileAttributes(accessTime, modifyTime, size, userId, groupId, permissions, extensions);
        }