コード例 #1
0
ファイル: SpanExtensions.cs プロジェクト: agocke/corefxlab
        /// <summary>
        /// Writes a structure of type T into a slice of bytes.
        /// </summary>
        public static void Write <[Primitive] T>(this Span <byte> slice, T value)
            where T : struct
        {
            Contract.Requires(slice.Length >= PtrUtils.SizeOf <T>());
            var cast = slice.Cast <byte, T>();

            cast[0] = value;
        }
コード例 #2
0
ファイル: SpanExtensions.cs プロジェクト: agocke/corefxlab
        // Some handy byte manipulation helpers:

        /// <summary>
        /// Casts a Slice of one primitive type (T) to another primitive type (U).
        /// These types may not contain managed objects, in order to preserve type
        /// safety.  This is checked statically by a Roslyn analyzer.
        /// </summary>
        /// <param name="slice">The source slice, of type T.</param>
        public static Span <U> Cast <[Primitive] T, [Primitive] U>(this Span <T> slice)
            where T : struct
            where U : struct
        {
            int countOfU = slice.Length * PtrUtils.SizeOf <T>() / PtrUtils.SizeOf <U>();

            if (countOfU == 0)
            {
                return(default(Span <U>));
            }
            return(new Span <U>(slice.Object, slice.Offset, countOfU));
        }
コード例 #3
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        public static bool ScsiMiniportIdentify(this IoControl IoControl, byte TargetId, out IdentifyDevice IdentifyDevice)
        {
            const byte ID_CMD       = 0xEC;
            var        SrbIoControl = new SrbIoControl(
                Signagure: "SCSIDISK",
                ControlCode: IOControlCode.ScsiMiniportIdentify,
                Timeout: 2
                );
            var inparams = new Disk.Sendcmdinparams(
                DriveRegs: new Disk.Ideregs(
                    CommandReg: ID_CMD
                    ),
                DriveNumber: TargetId
                );
            bool Result = IoControl.ScsiMiniport <Disk.Sendcmdinparams, IdentifyDeviceOutData>(ref SrbIoControl, inparams, out var outparams, out var ReturnBytes);
            var  buffer = new byte[IDENTIFY_BUFFER_SIZE];

            using (PtrUtils.CreatePtr(outparams, out var IntPtr, out var Size))
            {
                IdentifyDevice = (IdentifyDevice)Marshal.PtrToStructure(IntPtr.Add(IntPtr, (int)Marshal.OffsetOf <Disk.Sendcmdoutparams>(nameof(Disk.Sendcmdoutparams._Buffer))), typeof(IdentifyDevice));
                return(Result);
            }
        }
コード例 #4
0
ファイル: SpanExtensions.cs プロジェクト: agocke/corefxlab
 /// <summary>
 /// Reads a structure of type T out of a slice of bytes.
 /// </summary>
 public static T Read <[Primitive] T>(this Span <byte> slice)
     where T : struct
 {
     Contract.Requires(slice.Length >= PtrUtils.SizeOf <T>());
     return(slice.Cast <byte, T>()[0]);
 }
コード例 #5
0
 public static StorageDeviceNumber FromPtr(IntPtr IntPtr, uint Size) => PtrUtils.PtrToStructure <StorageDeviceNumber>(IntPtr, Size);