using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.InteropServices;
using System.Text;
using DiscImageChef.Console;
using Marshal = DiscImageChef.Helpers.Marshal;

namespace DiscImageChef.CommonTypes.Structs.Devices.ATA
{
    /// <summary>
    ///     Information from following standards: T10-791D rev. 4c (ATA) T10-948D rev. 4c (ATA-2) T13-1153D rev. 18
    ///     (ATA/ATAPI-4) T13-1321D rev. 3 (ATA/ATAPI-5) T13-1410D rev. 3b (ATA/ATAPI-6) T13-1532D rev. 4b (ATA/ATAPI-7)
    ///     T13-1699D rev. 3f (ATA8-ACS) T13-1699D rev. 4a (ATA8-ACS) T13-2015D rev. 2 (ACS-2) T13-2161D rev. 5 (ACS-3) CF+
    ///     &amp; CF Specification rev. 1.4 (CFA)
    /// </summary>
    [SuppressMessage("ReSharper", "InconsistentNaming"), SuppressMessage("ReSharper", "MemberCanBeInternal"),
     SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
    public static class Identify
    {
        /// <summary>Capabilities flag bits.</summary>
        [Flags]
        public enum CapabilitiesBit : ushort
        {
            /// <summary>ATAPI: Interleaved DMA supported</summary>
            InterleavedDMA = 0x8000,
            /// <summary>ATAPI: Command queueing supported</summary>
            CommandQueue = 0x4000,
            /// <summary>Standby timer values are standard</summary>
            StandardStanbyTimer = 0x2000,
            /// <summary>ATAPI: Overlap operation supported</summary>
            OverlapOperation = 0x2000,
            /// <summary>ATAPI: ATA software reset required Obsoleted in ATA/ATAPI-4</summary>
            RequiresATASoftReset = 0x1000,
            /// <summary>IORDY is supported</summary>
            IORDY = 0x0800,
            /// <summary>IORDY can be disabled</summary>
            CanDisableIORDY = 0x0400,
            /// <summary>LBA is supported</summary>
            LBASupport = 0x0200,
            /// <summary>DMA is supported</summary>
            DMASupport = 0x0100,
            /// <summary>Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            VendorBit7 = 0x0080,
            /// <summary>Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            VendorBit6 = 0x0040,
            /// <summary>Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            VendorBit5 = 0x0020,
            /// <summary>Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            VendorBit4 = 0x0010,
            /// <summary>Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            VendorBit3 = 0x0008,
            /// <summary>Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            VendorBit2 = 0x0004,
            /// <summary>Long Physical Alignment setting bit 1</summary>
            PhysicalAlignment1 = 0x0002,
            /// <summary>Long Physical Alignment setting bit 0</summary>
            PhysicalAlignment0 = 0x0001
        }

        /// <summary>More capabilities flag bits.</summary>
        [Flags]
        public enum CapabilitiesBit2 : ushort
        {
            /// <summary>MUST NOT be set</summary>
            MustBeClear = 0x8000,
            /// <summary>MUST be set</summary>
            MustBeSet = 0x4000, Reserved13 = 0x2000, Reserved12 = 0x1000, Reserved11 = 0x0800,
            Reserved10                     = 0x0400, Reserved09 = 0x0200, Reserved08 = 0x0100,
            Reserved07                     = 0x0080, Reserved06 = 0x0040, Reserved05 = 0x0020,
            Reserved04                     = 0x0010, Reserved03 = 0x0008, Reserved02 = 0x0004,
            Reserved01                     = 0x0002,
            /// <summary>Indicates a device specific minimum standby timer value</summary>
            SpecificStandbyTimer = 0x0001
        }

        [Flags]
        public enum CapabilitiesBit3 : byte
        {
            /// <summary>BLOCK ERASE EXT supported</summary>
            BlockErase = 0x0080,
            /// <summary>OVERWRITE EXT supported</summary>
            Overwrite = 0x0040,
            /// <summary>CRYPTO SCRAMBLE EXT supported</summary>
            CryptoScramble = 0x0020,
            /// <summary>Sanitize feature set is supported</summary>
            Sanitize = 0x0010,
            /// <summary>If unset, sanitize commands are specified by ACS-2</summary>
            SanitizeCommands = 0x0008,
            /// <summary>SANITIZE ANTIFREEZE LOCK EXT is supported</summary>
            SanitizeAntifreeze = 0x0004, Reserved01 = 0x0002,
            /// <summary>Multiple logical sector setting is valid</summary>
            MultipleValid = 0x0001
        }

        /// <summary>More capabilities flag bits.</summary>
        [Flags]
        public enum CommandSetBit : ushort
        {
            /// <summary>Already obsolete in ATA/ATAPI-4, reserved in ATA3</summary>
            Obsolete15 = 0x8000,
            /// <summary>NOP is supported</summary>
            Nop = 0x4000,
            /// <summary>READ BUFFER is supported</summary>
            ReadBuffer = 0x2000,
            /// <summary>WRITE BUFFER is supported</summary>
            WriteBuffer = 0x1000,
            /// <summary>Already obsolete in ATA/ATAPI-4, reserved in ATA3</summary>
            Obsolete11 = 0x0800,
            /// <summary>Host Protected Area is supported</summary>
            HPA = 0x0400,
            /// <summary>DEVICE RESET is supported</summary>
            DeviceReset = 0x0200,
            /// <summary>SERVICE interrupt is supported</summary>
            Service = 0x0100,
            /// <summary>Release is supported</summary>
            Release = 0x0080,
            /// <summary>Look-ahead is supported</summary>
            LookAhead = 0x0040,
            /// <summary>Write cache is supported</summary>
            WriteCache = 0x0020,
            /// <summary>PACKET command set is supported</summary>
            Packet = 0x0010,
            /// <summary>Power Management feature set is supported</summary>
            PowerManagement = 0x0008,
            /// <summary>Removable Media feature set is supported</summary>
            RemovableMedia = 0x0004,
            /// <summary>Security Mode feature set is supported</summary>
            SecurityMode = 0x0002,
            /// <summary>SMART feature set is supported</summary>
            SMART = 0x0001
        }

        /// <summary>More capabilities flag bits.</summary>
        [Flags]
        public enum CommandSetBit2 : ushort
        {
            /// <summary>MUST NOT be set</summary>
            MustBeClear = 0x8000,
            /// <summary>MUST BE SET</summary>
            MustBeSet = 0x4000,
            /// <summary>FLUSH CACHE EXT supported</summary>
            FlushCacheExt = 0x2000,
            /// <summary>FLUSH CACHE supported</summary>
            FlushCache = 0x1000,
            /// <summary>Device Configuration Overlay feature set supported</summary>
            DCO = 0x0800,
            /// <summary>48-bit LBA supported</summary>
            LBA48 = 0x0400,
            /// <summary>Automatic Acoustic Management supported</summary>
            AAM = 0x0200,
            /// <summary>SET MAX security extension supported</summary>
            SetMax = 0x0100,
            /// <summary>Address Offset Reserved Area Boot NCITS TR27:2001</summary>
            AddressOffsetReservedAreaBoot = 0x0080,
            /// <summary>SET FEATURES required to spin-up</summary>
            SetFeaturesRequired = 0x0040,
            /// <summary>Power-Up in standby feature set supported</summary>
            PowerUpInStandby = 0x0020,
            /// <summary>Removable Media Status Notification feature set is supported</summary>
            RemovableNotification = 0x0010,
            /// <summary>Advanced Power Management feature set is supported</summary>
            APM = 0x0008,
            /// <summary>Compact Flash feature set is supported</summary>
            CompactFlash = 0x0004,
            /// <summary>READ DMA QUEUED and WRITE DMA QUEUED are supported</summary>
            RWQueuedDMA = 0x0002,
            /// <summary>DOWNLOAD MICROCODE is supported</summary>
            DownloadMicrocode = 0x0001
        }

        /// <summary>More capabilities flag bits.</summary>
        [Flags]
        public enum CommandSetBit3 : ushort
        {
            /// <summary>MUST NOT be set</summary>
            MustBeClear = 0x8000,
            /// <summary>MUST BE SET</summary>
            MustBeSet = 0x4000,
            /// <summary>IDLE IMMEDIATE with UNLOAD FEATURE is supported</summary>
            IdleImmediate = 0x2000,
            /// <summary>Reserved for INCITS TR-37/2004</summary>
            Reserved12 = 0x1000,
            /// <summary>Reserved for INCITS TR-37/2004</summary>
            Reserved11 = 0x0800,
            /// <summary>URG bit is supported in WRITE STREAM DMA EXT and WRITE STREAM EXT</summary>
            WriteURG = 0x0400,
            /// <summary>URG bit is supported in READ STREAM DMA EXT and READ STREAM EXT</summary>
            ReadURG = 0x0200,
            /// <summary>64-bit World Wide Name is supported</summary>
            WWN = 0x0100,
            /// <summary>WRITE DMA QUEUED FUA EXT is supported</summary>
            FUAWriteQ = 0x0080,
            /// <summary>WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT are supported</summary>
            FUAWrite = 0x0040,
            /// <summary>General Purpose Logging feature supported</summary>
            GPL = 0x0020,
            /// <summary>Sstreaming feature set is supported</summary>
            Streaming = 0x0010,
            /// <summary>Media Card Pass Through command set supported</summary>
            MCPT = 0x0008,
            /// <summary>Media serial number supported</summary>
            MediaSerial = 0x0004,
            /// <summary>SMART self-test supported</summary>
            SMARTSelfTest = 0x0002,
            /// <summary>SMART error logging supported</summary>
            SMARTLog = 0x0001
        }

        /// <summary>More capabilities flag bits.</summary>
        [Flags]
        public enum CommandSetBit4 : ushort
        {
            /// <summary>MUST NOT be set</summary>
            MustBeClear = 0x8000,
            /// <summary>MUST be set</summary>
            MustBeSet = 0x4000, Reserved13 = 0x2000, Reserved12 = 0x1000, Reserved11 = 0x0800,
            Reserved10                     = 0x0400,
            /// <summary>DSN feature set is supported</summary>
            DSN = 0x0200,
            /// <summary>Accessible Max Address Configuration is supported</summary>
            AMAC = 0x0100,
            /// <summary>Extended Power Conditions is supported</summary>
            ExtPowerCond = 0x0080,
            /// <summary>Extended Status Reporting is supported</summary>
            ExtStatusReport = 0x0040,
            /// <summary>Free-fall Control feature set is supported</summary>
            FreeFallControl = 0x0020,
            /// <summary>Supports segmented feature in DOWNLOAD MICROCODE</summary>
            SegmentedDownloadMicrocode = 0x0010,
            /// <summary>READ/WRITE DMA EXT GPL are supported</summary>
            RWDMAExtGpl = 0x0008,
            /// <summary>WRITE UNCORRECTABLE is supported</summary>
            WriteUnc = 0x0004,
            /// <summary>Write/Read/Verify is supported</summary>
            WRV = 0x0002,
            /// <summary>Reserved for DT1825</summary>
            DT1825 = 0x0001
        }

        [Flags]
        public enum CommandSetBit5 : ushort
        {
            /// <summary>Supports CFast Specification</summary>
            CFast = 0x8000,
            /// <summary>Deterministic read after TRIM is supported</summary>
            DeterministicTrim = 0x4000,
            /// <summary>Long physical sector alignment error reporting control is supported</summary>
            LongPhysSectorAligError = 0x2000,
            /// <summary>DEVICE CONFIGURATION IDENTIFY DMA and DEVICE CONFIGURATION SET DMA are supported</summary>
            DeviceConfDMA = 0x1000,
            /// <summary>READ BUFFER DMA is supported</summary>
            ReadBufferDMA = 0x0800,
            /// <summary>WRITE BUFFER DMA is supported</summary>
            WriteBufferDMA = 0x0400,
            /// <summary>SET PASSWORD DMA and SET UNLOCK DMA are supported</summary>
            SetMaxDMA = 0x0200,
            /// <summary>DOWNLOAD MICROCODE DMA is supported</summary>
            DownloadMicroCodeDMA = 0x0100,
            /// <summary>Reserved for IEEE-1667</summary>
            IEEE1667 = 0x0080,
            /// <summary>Optional ATA 28-bit commands are supported</summary>
            Ata28 = 0x0040,
            /// <summary>Read zero after TRIM is supported</summary>
            ReadZeroTrim = 0x0020,
            /// <summary>Device encrypts all user data</summary>
            Encrypted = 0x0010,
            /// <summary>Extended number of user addressable sectors is supported</summary>
            ExtSectors = 0x0008,
            /// <summary>All write cache is non-volatile</summary>
            AllCacheNV = 0x0004,
            /// <summary>Zoned capabilities bit 1</summary>
            ZonedBit1 = 0x0002,
            /// <summary>Zoned capabilities bit 0</summary>
            ZonedBit0 = 0x0001
        }

        [Flags]
        public enum DataSetMgmtBit : ushort
        {
            Reserved15 = 0x8000, Reserved14 = 0x4000, Reserved13 = 0x2000,
            Reserved12 = 0x1000, Reserved11 = 0x0800, Reserved10 = 0x0400,
            Reserved09 = 0x0200, Reserved08 = 0x0100, Reserved07 = 0x0080,
            Reserved06 = 0x0040, Reserved05 = 0x0020, Reserved04 = 0x0010,
            Reserved03 = 0x0008, Reserved02 = 0x0004, Reserved01 = 0x0002,
            /// <summary>TRIM is suported</summary>
            Trim = 0x0001
        }

        public enum DeviceFormFactorEnum : ushort
        {
            /// <summary>Size not reported</summary>
            NotReported = 0,
            /// <summary>5.25"</summary>
            FiveAndQuarter = 1,
            /// <summary>3.5"</summary>
            ThreeAndHalf = 2,
            /// <summary>2.5"</summary>
            TwoAndHalf = 3,
            /// <summary>1.8"</summary>
            OnePointEight = 4,
            /// <summary>Less than 1.8"</summary>
            LessThanOnePointEight = 5
        }

        /// <summary>Extended identify flag bits.</summary>
        [Flags]
        public enum ExtendedIdentifyBit : byte
        {
            /// <summary>Reserved</summary>
            Reserved07 = 0x80,
            /// <summary>Reserved</summary>
            Reserved06 = 0x40,
            /// <summary>Reserved</summary>
            Reserved05 = 0x20,
            /// <summary>Reserved</summary>
            Reserved04 = 0x10,
            /// <summary>Reserved</summary>
            Reserved03 = 0x08,
            /// <summary>Identify word 88 is valid</summary>
            Word88Valid = 0x04,
            /// <summary>Identify words 64 to 70 are valid</summary>
            Words64to70Valid = 0x02,
            /// <summary>Identify words 54 to 58 are valid</summary>
            Words54to58Valid = 0x01
        }

        /// <summary>General configuration flag bits.</summary>
        [Flags]
        public enum GeneralConfigurationBit : ushort
        {
            /// <summary>Set on ATAPI</summary>
            NonMagnetic = 0x8000,
            /// <summary>Format speed tolerance gap is required Obsoleted in ATA-2</summary>
            FormatGapReq = 0x4000,
            /// <summary>Track offset option is available Obsoleted in ATA-2</summary>
            TrackOffset = 0x2000,
            /// <summary>Data strobe offset option is available Obsoleted in ATA-2</summary>
            DataStrobeOffset = 0x1000,
            /// <summary>Rotational speed tolerance is higher than 0,5% Obsoleted in ATA-2</summary>
            RotationalSpeedTolerance = 0x0800,
            /// <summary>Disk transfer rate is &gt; 10 Mb/s Obsoleted in ATA-2</summary>
            UltraFastIDE = 0x0400,
            /// <summary>Disk transfer rate is  &gt; 5 Mb/s but &lt;= 10 Mb/s Obsoleted in ATA-2</summary>
            FastIDE = 0x0200,
            /// <summary>Disk transfer rate is &lt;= 5 Mb/s Obsoleted in ATA-2</summary>
            SlowIDE = 0x0100,
            /// <summary>Drive uses removable media</summary>
            Removable = 0x0080,
            /// <summary>Drive is fixed Obsoleted in ATA/ATAPI-6</summary>
            Fixed = 0x0040,
            /// <summary>Spindle motor control is implemented Obsoleted in ATA-2</summary>
            SpindleControl = 0x0020,
            /// <summary>Head switch time is bigger than 15 µsec. Obsoleted in ATA-2</summary>
            HighHeadSwitch = 0x0010,
            /// <summary>Drive is not MFM encoded Obsoleted in ATA-2</summary>
            NotMFM = 0x0008,
            /// <summary>Drive is soft sectored Obsoleted in ATA-2</summary>
            SoftSector = 0x0004,
            /// <summary>Response incomplete Since ATA/ATAPI-5</summary>
            IncompleteResponse = 0x0004,
            /// <summary>Drive is hard sectored Obsoleted in ATA-2</summary>
            HardSector = 0x0002,
            /// <summary>Reserved</summary>
            Reserved = 0x0001
        }

        /// <summary>Word 80 Major version</summary>
        [Flags]
        public enum MajorVersionBit : ushort
        {
            Reserved15 = 0x8000, Reserved14 = 0x4000, Reserved13 = 0x2000,
            Reserved12 = 0x1000,
            /// <summary>ACS-4</summary>
            ACS4 = 0x0800,
            /// <summary>ACS-3</summary>
            ACS3 = 0x0400,
            /// <summary>ACS-2</summary>
            ACS2 = 0x0200,
            /// <summary>ATA8-ACS</summary>
            Ata8ACS = 0x0100,
            /// <summary>ATA/ATAPI-7</summary>
            AtaAtapi7 = 0x0080,
            /// <summary>ATA/ATAPI-6</summary>
            AtaAtapi6 = 0x0040,
            /// <summary>ATA/ATAPI-5</summary>
            AtaAtapi5 = 0x0020,
            /// <summary>ATA/ATAPI-4</summary>
            AtaAtapi4 = 0x0010,
            /// <summary>ATA-3</summary>
            Ata3 = 0x0008,
            /// <summary>ATA-2</summary>
            Ata2 = 0x0004,
            /// <summary>ATA-1</summary>
            Ata1 = 0x0002, Reserved00 = 0x0001
        }

        [Flags]
        public enum SATACapabilitiesBit : ushort
        {
            /// <summary>Supports READ LOG DMA EXT</summary>
            ReadLogDMAExt = 0x8000,
            /// <summary>Supports device automatic partial to slumber transitions</summary>
            DevSlumbTrans = 0x4000,
            /// <summary>Supports host automatic partial to slumber transitions</summary>
            HostSlumbTrans = 0x2000,
            /// <summary>Supports NCQ priroty</summary>
            NCQPriority = 0x1000,
            /// <summary>Supports unload while NCQ commands are outstanding</summary>
            UnloadNCQ = 0x0800,
            /// <summary>Supports PHY Event Counters</summary>
            PHYEventCounter = 0x0400,
            /// <summary>Supports receipt of host initiated power management requests</summary>
            PowerReceipt = 0x0200,
            /// <summary>Supports NCQ</summary>
            NCQ = 0x0100, Reserved07 = 0x0080, Reserved06 = 0x0040, Reserved05 = 0x0020,
            Reserved04               = 0x0010,
            /// <summary>Supports SATA Gen. 3 Signaling Speed (6.0Gb/s)</summary>
            Gen3Speed = 0x0008,
            /// <summary>Supports SATA Gen. 2 Signaling Speed (3.0Gb/s)</summary>
            Gen2Speed = 0x0004,
            /// <summary>Supports SATA Gen. 1 Signaling Speed (1.5Gb/s)</summary>
            Gen1Speed = 0x0002,
            /// <summary>MUST NOT be set</summary>
            Clear = 0x0001
        }

        [Flags]
        public enum SATACapabilitiesBit2 : ushort
        {
            Reserved15 = 0x8000, Reserved14 = 0x4000, Reserved13 = 0x2000,
            Reserved12 = 0x1000, Reserved11 = 0x0800, Reserved10 = 0x0400,
            Reserved09 = 0x0200, Reserved08 = 0x0100, Reserved07 = 0x0080,
            /// <summary>Supports RECEIVE FPDMA QUEUED and SEND FPDMA QUEUED</summary>
            FPDMAQ = 0x0040,
            /// <summary>Supports NCQ Queue Management</summary>
            NCQMgmt = 0x0020,
            /// <summary>ATAPI: Supports host environment detect</summary>
            HostEnvDetect = 0x0020,
            /// <summary>Supports NCQ streaming</summary>
            NCQStream = 0x0010,
            /// <summary>ATAPI: Supports device attention on slimline connected devices</summary>
            DevAttSlimline = 0x0010,
            /// <summary>Coded value indicating current negotiated Serial ATA signal speed</summary>
            CurrentSpeedBit2 = 0x0008,
            /// <summary>Coded value indicating current negotiated Serial ATA signal speed</summary>
            CurrentSpeedBit1 = 0x0004,
            /// <summary>Coded value indicating current negotiated Serial ATA signal speed</summary>
            CurrentSpeedBit0 = 0x0002,
            /// <summary>MUST NOT be set</summary>
            Clear = 0x0001
        }

        [Flags]
        public enum SATAFeaturesBit : ushort
        {
            Reserved15 = 0x8000, Reserved14 = 0x4000, Reserved13 = 0x2000,
            Reserved12 = 0x1000, Reserved11 = 0x0800, Reserved10 = 0x0400,
            Reserved09 = 0x0200, Reserved08 = 0x0100,
            /// <summary>Supports NCQ autosense</summary>
            NCQAutoSense = 0x0080,
            /// <summary>Automatic Partial to Slumber transitions are enabled</summary>
            EnabledSlumber = 0x0080,
            /// <summary>Supports Software Settings Preservation</summary>
            SettingsPreserve = 0x0040,
            /// <summary>Supports hardware feature control</summary>
            HardwareFeatureControl = 0x0020,
            /// <summary>ATAPI: Asynchronous notification</summary>
            AsyncNotification = 0x0020,
            /// <summary>Supports in-order data delivery</summary>
            InOrderData = 0x0010,
            /// <summary>Supports initiating power management</summary>
            InitPowerMgmt = 0x0008,
            /// <summary>Supports DMA Setup auto-activation</summary>
            DMASetup = 0x0004,
            /// <summary>Supports non-zero buffer offsets</summary>
            NonZeroBufferOffset = 0x0002,
            /// <summary>MUST NOT be set</summary>
            Clear = 0x0001
        }

        [Flags]
        public enum SCTCommandTransportBit : ushort
        {
            Vendor15   = 0x8000, Vendor14   = 0x4000, Vendor13   = 0x2000,
            Vendor12   = 0x1000, Reserved11 = 0x0800, Reserved10 = 0x0400,
            Reserved09 = 0x0200, Reserved08 = 0x0100, Reserved07 = 0x0080,
            Reserved06 = 0x0040,
            /// <summary>SCT Command Transport Data Tables supported</summary>
            DataTables = 0x0020,
            /// <summary>SCT Command Transport Features Control supported</summary>
            FeaturesControl = 0x0010,
            /// <summary>SCT Command Transport Error Recovery Control supported</summary>
            ErrorRecoveryControl = 0x0008,
            /// <summary>SCT Command Transport Write Same supported</summary>
            WriteSame = 0x0004,
            /// <summary>SCT Command Transport Long Sector Address supported</summary>
            LongSectorAccess = 0x0002,
            /// <summary>SCT Command Transport supported</summary>
            Supported = 0x0001
        }

        /// <summary>More capabilities flag bits.</summary>
        [Flags]
        public enum SecurityStatusBit : ushort
        {
            Reserved15 = 0x8000, Reserved14 = 0x4000, Reserved13 = 0x2000,
            Reserved12 = 0x1000, Reserved11 = 0x0800, Reserved10 = 0x0400,
            Reserved09 = 0x0200,
            /// <summary>Maximum security level</summary>
            Maximum = 0x0100, Reserved07 = 0x0080, Reserved06 = 0x0040,
            /// <summary>Supports enhanced security erase</summary>
            Enhanced = 0x0020,
            /// <summary>Security count expired</summary>
            Expired = 0x0010,
            /// <summary>Security frozen</summary>
            Frozen = 0x0008,
            /// <summary>Security locked</summary>
            Locked = 0x0004,
            /// <summary>Security enabled</summary>
            Enabled = 0x0002,
            /// <summary>Security supported</summary>
            Supported = 0x0001
        }

        public enum SpecificConfigurationEnum : ushort
        {
            /// <summary>Device requires SET FEATURES to spin up and IDENTIFY DEVICE response is incomplete</summary>
            RequiresSetIncompleteResponse = 0x37C8,
            /// <summary>Device requires SET FEATURES to spin up and IDENTIFY DEVICE response is complete</summary>
            RequiresSetCompleteResponse = 0x738C,
            /// <summary>Device does not requires SET FEATURES to spin up and IDENTIFY DEVICE response is incomplete</summary>
            NotRequiresSetIncompleteResponse = 0x8C73,
            /// <summary>Device does not requires SET FEATURES to spin up and IDENTIFY DEVICE response is complete</summary>
            NotRequiresSetCompleteResponse = 0xC837
        }

        [Flags]
        public enum TransferMode : byte
        {
            Mode7 = 0x80, Mode6 = 0x40, Mode5 = 0x20,
            Mode4 = 0x10, Mode3 = 0x08, Mode2 = 0x04,
            Mode1 = 0x02, Mode0 = 0x01
        }

        [Flags]
        public enum TrustedComputingBit : ushort
        {
            /// <summary>MUST NOT be set</summary>
            Clear = 0x8000,
            /// <summary>MUST be set</summary>
            Set = 0x4000, Reserved13 = 0x2000, Reserved12 = 0x1000, Reserved11 = 0x0800,
            Reserved10               = 0x0400, Reserved09 = 0x0200, Reserved08 = 0x0100,
            Reserved07               = 0x0080, Reserved06 = 0x0040, Reserved05 = 0x0020,
            Reserved04               = 0x0010, Reserved03 = 0x0008, Reserved02 = 0x0004,
            Reserved01               = 0x0002,
            /// <summary>Trusted Computing feature set is supported</summary>
            TrustedComputing = 0x0001
        }

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 2)]
        public struct IdentifyDevice
        {
            /// <summary>
            ///     Word 0 General device configuration On ATAPI devices: Bits 12 to 8 indicate device type as SCSI defined Bits 6
            ///     to 5: 0 = Device shall set DRQ within 3 ms of receiving PACKET 1 = Device shall assert INTRQ when DRQ is set to one
            ///     2 = Device shall set DRQ within 50 µs of receiving PACKET Bits 1 to 0: 0 = 12 byte command packet 1 = 16 byte
            ///     command packet CompactFlash is 0x848A (non magnetic, removable, not MFM, hardsector, and UltraFAST)
            /// </summary>
            public GeneralConfigurationBit GeneralConfiguration;
            /// <summary>Word 1 Cylinders in default translation mode Obsoleted in ATA/ATAPI-6</summary>
            public ushort Cylinders;
            /// <summary>Word 2 Specific configuration</summary>
            public SpecificConfigurationEnum SpecificConfiguration;
            /// <summary>Word 3 Heads in default translation mode Obsoleted in ATA/ATAPI-6</summary>
            public ushort Heads;
            /// <summary>Word 4 Unformatted bytes per track in default translation mode Obsoleted in ATA-2</summary>
            public ushort UnformattedBPT;
            /// <summary>Word 5 Unformatted bytes per sector in default translation mode Obsoleted in ATA-2</summary>
            public ushort UnformattedBPS;
            /// <summary>Word 6 Sectors per track in default translation mode Obsoleted in ATA/ATAPI-6</summary>
            public ushort SectorsPerTrack;
            /// <summary>Words 7 to 8 CFA: Number of sectors per card</summary>
            public uint SectorsPerCard;
            /// <summary>Word 9 Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            public ushort VendorWord9;
            /// <summary>Words 10 to 19 Device serial number, right justified, padded with spaces</summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]
            public string SerialNumber;
            /// <summary>
            ///     Word 20 Manufacturer defined Obsoleted in ATA-2 0x0001 = single ported single sector buffer 0x0002 = dual
            ///     ported multi sector buffer 0x0003 = dual ported multi sector buffer with reading
            /// </summary>
            public ushort BufferType;
            /// <summary>Word 21 Size of buffer in 512 byte increments Obsoleted in ATA-2</summary>
            public ushort BufferSize;
            /// <summary>Word 22 Bytes of ECC available in READ/WRITE LONG commands Obsoleted in ATA/ATAPI-4</summary>
            public ushort EccBytes;
            /// <summary>Words 23 to 26 Firmware revision, left justified, padded with spaces</summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
            public string FirmwareRevision;
            /// <summary>Words 27 to 46 Model number, left justified, padded with spaces</summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 40)]
            public string Model;
            /// <summary>
            ///     Word 47 bits 7 to 0 Maximum number of sectors that can be transferred per interrupt on read and write multiple
            ///     commands
            /// </summary>
            public byte MultipleMaxSectors;
            /// <summary>Word 47 bits 15 to 8 Vendor unique ATA/ATAPI-4 says it must be 0x80</summary>
            public byte VendorWord47;
            /// <summary>
            ///     Word 48 ATA-1: Set to 1 if it can perform doubleword I/O ATA-2 to ATA/ATAPI-7: Reserved ATA8-ACS: Trusted
            ///     Computing feature set
            /// </summary>
            public TrustedComputingBit TrustedComputing;
            /// <summary>Word 49 Capabilities</summary>
            public CapabilitiesBit Capabilities;
            /// <summary>Word 50 Capabilities</summary>
            public CapabilitiesBit2 Capabilities2;
            /// <summary>Word 51 bits 7 to 0 Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            public byte VendorWord51;
            /// <summary>Word 51 bits 15 to 8 Transfer timing mode in PIO Obsoleted in ATA/ATAPI-4</summary>
            public byte PIOTransferTimingMode;
            /// <summary>Word 52 bits 7 to 0 Vendor unique Obsoleted in ATA/ATAPI-4</summary>
            public byte VendorWord52;
            /// <summary>Word 52 bits 15 to 8 Transfer timing mode in DMA Obsoleted in ATA/ATAPI-4</summary>
            public byte DMATransferTimingMode;
            /// <summary>Word 53 bits 7 to 0 Reports if words 54 to 58 are valid</summary>
            public ExtendedIdentifyBit ExtendedIdentify;
            /// <summary>Word 53 bits 15 to 8 Free-fall Control Sensitivity</summary>
            public byte FreeFallSensitivity;
            /// <summary>Word 54 Cylinders in current translation mode Obsoleted in ATA/ATAPI-6</summary>
            public ushort CurrentCylinders;
            /// <summary>Word 55 Heads in current translation mode Obsoleted in ATA/ATAPI-6</summary>
            public ushort CurrentHeads;
            /// <summary>Word 56 Sectors per track in current translation mode Obsoleted in ATA/ATAPI-6</summary>
            public ushort CurrentSectorsPerTrack;
            /// <summary>Words 57 to 58 Total sectors currently user-addressable Obsoleted in ATA/ATAPI-6</summary>
            public uint CurrentSectors;
            /// <summary>Word 59 bits 7 to 0 Number of sectors currently set to transfer on a READ/WRITE MULTIPLE command</summary>
            public byte MultipleSectorNumber;
            /// <summary>Word 59 bits 15 to 8 Indicates if <see cref="MultipleSectorNumber" /> is valid</summary>
            public CapabilitiesBit3 Capabilities3;
            /// <summary>Words 60 to 61 If drive supports LBA, how many sectors are addressable using LBA</summary>
            public uint LBASectors;
            /// <summary>
            ///     Word 62 bits 7 to 0 Single word DMA modes available Obsoleted in ATA/ATAPI-4 In ATAPI it's not obsolete,
            ///     indicates UDMA mode (UDMA7 is instead MDMA0)
            /// </summary>
            public TransferMode DMASupported;
            /// <summary>
            ///     Word 62 bits 15 to 8 Single word DMA mode currently active Obsoleted in ATA/ATAPI-4 In ATAPI it's not
            ///     obsolete, bits 0 and 1 indicate MDMA mode+1, bit 10 indicates DMA is supported and bit 15 indicates DMADIR bit in
            ///     PACKET is required for DMA transfers
            /// </summary>
            public TransferMode DMAActive;
            /// <summary>Word 63 bits 7 to 0 Multiword DMA modes available</summary>
            public TransferMode MDMASupported;
            /// <summary>Word 63 bits 15 to 8 Multiword DMA mode currently active</summary>
            public TransferMode MDMAActive;

            /// <summary>Word 64 bits 7 to 0 Supported Advanced PIO transfer modes</summary>
            public TransferMode APIOSupported;
            /// <summary>Word 64 bits 15 to 8 Reserved</summary>
            public byte ReservedWord64;
            /// <summary>Word 65 Minimum MDMA transfer cycle time per word in nanoseconds</summary>
            public ushort MinMDMACycleTime;
            /// <summary>Word 66 Recommended MDMA transfer cycle time per word in nanoseconds</summary>
            public ushort RecMDMACycleTime;
            /// <summary>Word 67 Minimum PIO transfer cycle time without flow control in nanoseconds</summary>
            public ushort MinPIOCycleTimeNoFlow;
            /// <summary>Word 68 Minimum PIO transfer cycle time with IORDY flow control in nanoseconds</summary>
            public ushort MinPIOCycleTimeFlow;

            /// <summary>Word 69 Additional supported</summary>
            public CommandSetBit5 CommandSet5;
            /// <summary>Word 70 Reserved</summary>
            public ushort ReservedWord70;
            /// <summary>Word 71 ATAPI: Typical time in ns from receipt of PACKET to release bus</summary>
            public ushort PacketBusRelease;
            /// <summary>Word 72 ATAPI: Typical time in ns from receipt of SERVICE to clear BSY</summary>
            public ushort ServiceBusyClear;
            /// <summary>Word 73 Reserved</summary>
            public ushort ReservedWord73;
            /// <summary>Word 74 Reserved</summary>
            public ushort ReservedWord74;

            /// <summary>Word 75 Maximum Queue depth</summary>
            public ushort MaxQueueDepth;

            /// <summary>Word 76 Serial ATA Capabilities</summary>
            public SATACapabilitiesBit SATACapabilities;
            /// <summary>Word 77 Serial ATA Additional Capabilities</summary>
            public SATACapabilitiesBit2 SATACapabilities2;

            /// <summary>Word 78 Supported Serial ATA features</summary>
            public SATAFeaturesBit SATAFeatures;
            /// <summary>Word 79 Enabled Serial ATA features</summary>
            public SATAFeaturesBit EnabledSATAFeatures;

            /// <summary>Word 80 Major version of ATA/ATAPI standard supported</summary>
            public MajorVersionBit MajorVersion;
            /// <summary>Word 81 Minimum version of ATA/ATAPI standard supported</summary>
            public ushort MinorVersion;

            /// <summary>Word 82 Supported command/feature sets</summary>
            public CommandSetBit CommandSet;
            /// <summary>Word 83 Supported command/feature sets</summary>
            public CommandSetBit2 CommandSet2;
            /// <summary>Word 84 Supported command/feature sets</summary>
            public CommandSetBit3 CommandSet3;

            /// <summary>Word 85 Enabled command/feature sets</summary>
            public CommandSetBit EnabledCommandSet;
            /// <summary>Word 86 Enabled command/feature sets</summary>
            public CommandSetBit2 EnabledCommandSet2;
            /// <summary>Word 87 Enabled command/feature sets</summary>
            public CommandSetBit3 EnabledCommandSet3;

            /// <summary>Word 88 bits 7 to 0 Supported Ultra DMA transfer modes</summary>
            public TransferMode UDMASupported;
            /// <summary>Word 88 bits 15 to 8 Selected Ultra DMA transfer modes</summary>
            public TransferMode UDMAActive;

            /// <summary>Word 89 Time required for security erase completion</summary>
            public ushort SecurityEraseTime;
            /// <summary>Word 90 Time required for enhanced security erase completion</summary>
            public ushort EnhancedSecurityEraseTime;
            /// <summary>Word 91 Current advanced power management value</summary>
            public ushort CurrentAPM;

            /// <summary>Word 92 Master password revision code</summary>
            public ushort MasterPasswordRevisionCode;
            /// <summary>Word 93 Hardware reset result</summary>
            public ushort HardwareResetResult;

            /// <summary>Word 94 bits 7 to 0 Current AAM value</summary>
            public byte CurrentAAM;
            /// <summary>Word 94 bits 15 to 8 Vendor's recommended AAM value</summary>
            public byte RecommendedAAM;

            /// <summary>Word 95 Stream minimum request size</summary>
            public ushort StreamMinReqSize;
            /// <summary>Word 96 Streaming transfer time in DMA</summary>
            public ushort StreamTransferTimeDMA;
            /// <summary>Word 97 Streaming access latency in DMA and PIO</summary>
            public ushort StreamAccessLatency;
            /// <summary>Words 98 to 99 Streaming performance granularity</summary>
            public uint StreamPerformanceGranularity;

            /// <summary>Words 100 to 103 48-bit LBA addressable sectors</summary>
            public ulong LBA48Sectors;

            /// <summary>Word 104 Streaming transfer time in PIO</summary>
            public ushort StreamTransferTimePIO;

            /// <summary>Word 105 Maximum number of 512-byte block per DATA SET MANAGEMENT command</summary>
            public ushort DataSetMgmtSize;

            /// <summary>
            ///     Word 106 Bit 15 should be zero Bit 14 should be one Bit 13 set indicates device has multiple logical sectors
            ///     per physical sector Bit 12 set indicates logical sector has more than 256 words (512 bytes) Bits 11 to 4 are
            ///     reserved Bits 3 to 0 indicate power of two of logical sectors per physical sector
            /// </summary>
            public ushort PhysLogSectorSize;

            /// <summary>Word 107 Interseek delay for ISO-7779 acoustic testing, in microseconds</summary>
            public ushort InterseekDelay;

            /// <summary>Words 108 to 111 World Wide Name</summary>
            public ulong WWN;

            /// <summary>Words 112 to 115 Reserved for WWN extension to 128 bit</summary>
            public ulong WWNExtension;

            /// <summary>Word 116 Reserved for technical report</summary>
            public ushort ReservedWord116;

            /// <summary>Words 117 to 118 Words per logical sector</summary>
            public uint LogicalSectorWords;

            /// <summary>Word 119 Supported command/feature sets</summary>
            public CommandSetBit4 CommandSet4;
            /// <summary>Word 120 Supported command/feature sets</summary>
            public CommandSetBit4 EnabledCommandSet4;

            /// <summary>Words 121 to 125 Reserved</summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
            public ushort[] ReservedWords121;

            /// <summary>Word 126 ATAPI byte count limit</summary>
            public ushort ATAPIByteCount;

            /// <summary>
            ///     Word 127 Removable Media Status Notification feature set support Bits 15 to 2 are reserved Bits 1 to 0 must be
            ///     0 for not supported or 1 for supported. 2 and 3 are reserved. Obsoleted in ATA8-ACS
            /// </summary>
            public ushort RemovableStatusSet;

            /// <summary>Word 128 Security status</summary>
            public SecurityStatusBit SecurityStatus;

            /// <summary>Words 129 to 159</summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 31)]
            public ushort[] ReservedWords129;

            /// <summary>
            ///     Word 160 CFA power mode Bit 15 must be set Bit 13 indicates mode 1 is required for one or more commands Bit 12
            ///     indicates mode 1 is disabled Bits 11 to 0 indicates maximum current in mA
            /// </summary>
            public ushort CFAPowerMode;

            /// <summary>Words 161 to 167 Reserved for CFA</summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)]
            public ushort[] ReservedCFA;

            /// <summary>Word 168 Bits 15 to 4, reserved Bits 3 to 0, device nominal form factor</summary>
            public DeviceFormFactorEnum DeviceFormFactor;
            /// <summary>Word 169 DATA SET MANAGEMENT support</summary>
            public DataSetMgmtBit DataSetMgmt;
            /// <summary>Words 170 to 173 Additional product identifier</summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
            public string AdditionalPID;

            /// <summary>Word 174 Reserved</summary>
            public ushort ReservedWord174;
            /// <summary>Word 175 Reserved</summary>
            public ushort ReservedWord175;

            /// <summary>Words 176 to 195 Current media serial number</summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 40)]
            public string MediaSerial;
            /// <summary>Words 196 to 205 Current media manufacturer</summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]
            public string MediaManufacturer;

            /// <summary>Word 206 SCT Command Transport features</summary>
            public SCTCommandTransportBit SCTCommandTransport;

            /// <summary>Word 207 Reserved for CE-ATA</summary>
            public ushort ReservedCEATAWord207;
            /// <summary>Word 208 Reserved for CE-ATA</summary>
            public ushort ReservedCEATAWord208;

            /// <summary>
            ///     Word 209 Alignment of logical block within a larger physical block Bit 15 shall be cleared to zero Bit 14
            ///     shall be set to one Bits 13 to 0 indicate logical sector offset within the first physical sector
            /// </summary>
            public ushort LogicalAlignment;

            /// <summary>Words 210 to 211 Write/Read/Verify sector count mode 3 only</summary>
            public uint WRVSectorCountMode3;
            /// <summary>Words 212 to 213 Write/Read/Verify sector count mode 2 only</summary>
            public uint WRVSectorCountMode2;

            /// <summary>
            ///     Word 214 NV Cache capabilities Bits 15 to 12 feature set version Bits 11 to 18 power mode feature set version
            ///     Bits 7 to 5 reserved Bit 4 feature set enabled Bits 3 to 2 reserved Bit 1 power mode feature set enabled Bit 0
            ///     power mode feature set supported
            /// </summary>
            public ushort NVCacheCaps;
            /// <summary>Words 215 to 216 NV Cache Size in Logical BLocks</summary>
            public uint NVCacheSize;
            /// <summary>Word 217 Nominal media rotation rate In ACS-1 meant NV Cache read speed in MB/s</summary>
            public ushort NominalRotationRate;
            /// <summary>Word 218 NV Cache write speed in MB/s Reserved since ACS-2</summary>
            public ushort NVCacheWriteSpeed;
            /// <summary>Word 219 bits 7 to 0 Estimated device spin up in seconds</summary>
            public byte NVEstimatedSpinUp;
            /// <summary>Word 219 bits 15 to 8 NV Cache reserved</summary>
            public byte NVReserved;

            /// <summary>Word 220 bits 7 to 0 Write/Read/Verify feature set current mode</summary>
            public byte WRVMode;
            /// <summary>Word 220 bits 15 to 8 Reserved</summary>
            public byte WRVReserved;

            /// <summary>Word 221 Reserved</summary>
            public ushort ReservedWord221;

            /// <summary>
            ///     Word 222 Transport major revision number Bits 15 to 12 indicate transport type. 0 parallel, 1 serial, 0xE
            ///     PCIe. Bits 11 to 0 indicate revision
            /// </summary>
            public ushort TransportMajorVersion;
            /// <summary>Word 223 Transport minor revision number</summary>
            public ushort TransportMinorVersion;

            /// <summary>Words 224 to 229 Reserved for CE-ATA</summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
            public ushort[] ReservedCEATA224;

            /// <summary>Words 230 to 233 48-bit LBA if Word 69 bit 3 is set</summary>
            public ulong ExtendedUserSectors;

            /// <summary>Word 234 Minimum number of 512 byte units per DOWNLOAD MICROCODE mode 3</summary>
            public ushort MinDownloadMicroMode3;
            /// <summary>Word 235 Maximum number of 512 byte units per DOWNLOAD MICROCODE mode 3</summary>
            public ushort MaxDownloadMicroMode3;

            /// <summary>Words 236 to 254</summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 19)]
            public ushort[] ReservedWords;

            /// <summary>Word 255 bits 7 to 0 Should be 0xA5</summary>
            public byte Signature;
            /// <summary>Word 255 bits 15 to 8 Checksum</summary>
            public byte Checksum;
        }

        public static IdentifyDevice? Decode(byte[] IdentifyDeviceResponse)
        {
            if(IdentifyDeviceResponse == null)
                return null;

            if(IdentifyDeviceResponse.Length != 512)
            {
                DicConsole.DebugWriteLine("ATA/ATAPI IDENTIFY decoder",
                                          "IDENTIFY response is different than 512 bytes, not decoding.");

                return null;
            }

            IdentifyDevice ATAID = Marshal.ByteArrayToStructureLittleEndian<IdentifyDevice>(IdentifyDeviceResponse);

            ATAID.WWN          = DescrambleWWN(ATAID.WWN);
            ATAID.WWNExtension = DescrambleWWN(ATAID.WWNExtension);

            ATAID.SerialNumber      = DescrambleATAString(IdentifyDeviceResponse, 10  * 2, 20);
            ATAID.FirmwareRevision  = DescrambleATAString(IdentifyDeviceResponse, 23  * 2, 8);
            ATAID.Model             = DescrambleATAString(IdentifyDeviceResponse, 27  * 2, 40);
            ATAID.AdditionalPID     = DescrambleATAString(IdentifyDeviceResponse, 170 * 2, 8);
            ATAID.MediaSerial       = DescrambleATAString(IdentifyDeviceResponse, 176 * 2, 40);
            ATAID.MediaManufacturer = DescrambleATAString(IdentifyDeviceResponse, 196 * 2, 20);

            return ATAID;
        }

        public static byte[] Encode(IdentifyDevice? identify)
        {
            if(identify is null)
                return null;

            IdentifyDevice ataId = identify.Value;

            ataId.WWN          = DescrambleWWN(ataId.WWN);
            ataId.WWNExtension = DescrambleWWN(ataId.WWNExtension);

            byte[] buf = new byte[512];
            IntPtr ptr = System.Runtime.InteropServices.Marshal.AllocHGlobal(512);
            System.Runtime.InteropServices.Marshal.StructureToPtr(ataId, ptr, false);
            System.Runtime.InteropServices.Marshal.Copy(ptr, buf, 0, 512);
            System.Runtime.InteropServices.Marshal.FreeHGlobal(ptr);

            byte[] str = ScrambleATAString(ataId.SerialNumber, 20);
            Array.Copy(str, 0, buf, 10 * 2, 20);
            str = ScrambleATAString(ataId.FirmwareRevision, 8);
            Array.Copy(str, 0, buf, 23 * 2, 8);
            str = ScrambleATAString(ataId.Model, 40);
            Array.Copy(str, 0, buf, 27 * 2, 40);
            str = ScrambleATAString(ataId.AdditionalPID, 8);
            Array.Copy(str, 0, buf, 170 * 2, 8);
            str = ScrambleATAString(ataId.MediaSerial, 40);
            Array.Copy(str, 0, buf, 176 * 2, 40);
            str = ScrambleATAString(ataId.MediaManufacturer, 20);
            Array.Copy(str, 0, buf, 196 * 2, 20);

            return buf;
        }

        static ulong DescrambleWWN(ulong WWN)
        {
            byte[] qwb   = BitConverter.GetBytes(WWN);
            byte[] qword = new byte[8];

            qword[7] = qwb[1];
            qword[6] = qwb[0];
            qword[5] = qwb[3];
            qword[4] = qwb[2];
            qword[3] = qwb[5];
            qword[2] = qwb[4];
            qword[1] = qwb[7];
            qword[0] = qwb[6];

            return BitConverter.ToUInt64(qword, 0);
        }

        static string DescrambleATAString(IList<byte> buffer, int offset, int length)
        {
            byte[] outbuf = buffer[(offset + length) - 1] != 0x00 ? new byte[length + 1] : new byte[length];

            for(int i = 0; i < length; i += 2)
            {
                outbuf[i] = buffer[offset + i + 1];
                outbuf[i                      + 1] = buffer[offset + i];
            }

            string outStr = StringHandlers.CToString(outbuf);

            return outStr.Trim();
        }

        static byte[] ScrambleATAString(string str, int length)
        {
            byte[] buf = new byte[length];

            for(int i = 0; i < length; i++)
                buf[i] = 0x20;

            if(str is null)
                return buf;

            byte[] bytes = Encoding.ASCII.GetBytes(str);

            if(bytes.Length % 2 != 0)
            {
                byte[] tmp = new byte[bytes.Length + 1];
                tmp[tmp.Length                     - 1] = 0x20;
                Array.Copy(bytes, 0, tmp, 0, bytes.Length);
                bytes = tmp;
            }

            for(int i = 0; i < bytes.Length; i += 2)
            {
                buf[i] = bytes[i + 1];
                buf[i            + 1] = bytes[i];
            }

            string test1 = StringHandlers.CToString(buf);
            string test2 = DescrambleATAString(buf, 0, length);

            return buf;
        }
    }
}