63 lines
2.0 KiB
C#
63 lines
2.0 KiB
C#
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///////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: BitmapFileHeader.cs
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//
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// Note:
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//
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#define BUG
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using System;
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using System.Runtime.InteropServices;
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using Microsoft.SingSharp;
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using Microsoft.Singularity;
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using Microsoft.Singularity.Channels;
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namespace Microsoft.Singularity.Io
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{
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#if BUG
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[CLSCompliant(false)]
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[StructLayout(LayoutKind.Explicit)]
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public pointerfree struct BITMAPFILEHEADER {
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[FieldOffset( 0)] public ushort bfType;
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[FieldOffset( 2)] public uint bfSize;
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[FieldOffset( 6)] public ushort bfReserved1;
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[FieldOffset( 8)] public ushort bfReserved2;
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[FieldOffset(10)] public int bfOffBits;
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#else
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[CLSCompliant(false)]
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[StructLayout(LayoutKind.Sequential, Pack=2)]
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public pointerfree struct BITMAPFILEHEADER {
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public ushort bfType;
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public uint bfSize;
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public ushort bfReserved1;
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public ushort bfReserved2;
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public int bfOffBits;
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#endif
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public static BITMAPFILEHEADER Read(byte[]! in ExHeap buffer,
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int offset, out int used)
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{
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if (buffer == null || offset < 0 ||
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offset + sizeof(BITMAPFILEHEADER) > buffer.Length) {
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unchecked {
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Tracing.Log(Tracing.Error,
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"BITMAPFILEHEADER Read(offset={0}, length={1})",
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(UIntPtr)(uint)offset,
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(UIntPtr)(uint)buffer.Length);
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}
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throw new OverflowException("Read source invalid.");
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}
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used = offset + /*sizeof(BITMAPFILEHEADER)*/ 14;
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ref BITMAPFILEHEADER bmfh = ref buffer[offset];
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return bmfh;
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}
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}
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} // namespace Microsoft.Singularity.Io
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