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[MacBinary] Use new source generator based big endian marshaller

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Natalia Portillo
2025-10-21 04:00:15 +01:00
parent 78e48801d3
commit fea6b18873
1 changed files with 85 additions and 83 deletions
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168
Aaru.Filters/MacBinary.cs
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@@ -34,6 +34,7 @@ using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using Aaru.CommonTypes.Attributes;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Interfaces;
using Aaru.Helpers;
@@ -45,7 +46,7 @@ namespace Aaru.Filters;
// TODO: Interpret fdScript
/// <inheritdoc />
/// <summary>Decodes MacBinary files</summary>
public sealed class MacBinary : IFilter
public sealed partial class MacBinary : IFilter
{
const uint MAGIC = 0x6D42494E;
byte[] _bytes;
@@ -55,6 +56,83 @@ public sealed class MacBinary : IFilter
long _rsrcForkOff;
Stream _stream;
#region Nested type: Header
[StructLayout(LayoutKind.Sequential, Pack = 1)]
[SwapEndian]
struct Header
{
/// <summary>0x00, MacBinary version, 0</summary>
public byte version;
/// <summary>0x01, Str63 Pascal filename</summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
public byte[] filename;
/// <summary>0x41, File type</summary>
public uint type;
/// <summary>0x45, File creator</summary>
public uint creator;
/// <summary>0x49, High byte of Finder flags</summary>
public byte finderFlags;
/// <summary>0x4A, Must be 0</summary>
public byte zero1;
/// <summary>0x4B, File's icon vertical position within its window</summary>
public ushort verticalPosition;
/// <summary>0x4D, File's icon horizontal position within its window</summary>
public ushort horizontalPosition;
/// <summary>0x4F, File's window or folder ID</summary>
public short windowID;
/// <summary>0x51, Protected flag</summary>
public byte protect;
/// <summary>0x52, Must be 0</summary>
public byte zero2;
/// <summary>0x53, Size of data fork</summary>
public uint dataLength;
/// <summary>0x57, Size of resource fork</summary>
public uint resourceLength;
/// <summary>0x5B, File's creation time</summary>
public uint creationTime;
/// <summary>0x5F, File's last modified time</summary>
public uint modificationTime;
/// <summary>0x63, Length of Get Info comment</summary>
public ushort commentLength;
/// <summary>0x65, Low byte of Finder flags</summary>
public byte finderFlags2;
#region MacBinary III
/// <summary>0x66, magic identifier, "mBIN"</summary>
public uint magic;
/// <summary>0x6A, fdScript from fxInfo, identifies codepage of filename</summary>
public byte fdScript;
/// <summary>0x6B, fdXFlags from fxInfo, extended Mac OS 8 finder flags</summary>
public byte fdXFlags;
#endregion MacBinary III
/// <summary>0x6C, unused</summary>
public ulong reserved;
/// <summary>0x74, Total unpacked files</summary>
public uint totalPackedFiles;
#region MacBinary II
/// <summary>0x78, Length of secondary header</summary>
public ushort secondaryHeaderLength;
/// <summary>0x7A, version number of MacBinary that wrote this file, starts at 129</summary>
public byte version2;
/// <summary>0x7B, version number of MacBinary required to open this file, starts at 129</summary>
public byte minVersion;
/// <summary>0x7C, CRC of previous bytes</summary>
public short crc;
#endregion MacBinary II
/// <summary>0x7E, Reserved for computer type and OS ID</summary>
public short computerID;
}
#endregion
#region IFilter Members
/// <inheritdoc />
@@ -155,7 +233,7 @@ public sealed class MacBinary : IFilter
var hdrB = new byte[128];
Array.Copy(buffer, 0, hdrB, 0, 128);
_header = Marshal.ByteArrayToStructureBigEndian<Header>(hdrB);
_header = Marshal.ByteArrayToStructureBigEndianGenerated<Header>(hdrB);
return _header.magic == MAGIC ||
_header.version == 0 &&
@@ -174,7 +252,7 @@ public sealed class MacBinary : IFilter
var hdrB = new byte[128];
stream.Seek(0, SeekOrigin.Begin);
stream.EnsureRead(hdrB, 0, 128);
_header = Marshal.ByteArrayToStructureBigEndian<Header>(hdrB);
_header = Marshal.ByteArrayToStructureBigEndianGenerated<Header>(hdrB);
return _header.magic == MAGIC ||
_header.version == 0 &&
@@ -196,7 +274,7 @@ public sealed class MacBinary : IFilter
var hdrB = new byte[128];
fstream.EnsureRead(hdrB, 0, 128);
_header = Marshal.ByteArrayToStructureBigEndian<Header>(hdrB);
_header = Marshal.ByteArrayToStructureBigEndianGenerated<Header>(hdrB);
fstream.Close();
@@ -217,7 +295,7 @@ public sealed class MacBinary : IFilter
var hdrB = new byte[128];
ms.EnsureRead(hdrB, 0, 128);
_header = Marshal.ByteArrayToStructureBigEndian<Header>(hdrB);
_header = Marshal.ByteArrayToStructureBigEndianGenerated<Header>(hdrB);
uint blocks = 1;
blocks += (uint)(_header.secondaryHeaderLength / 128);
@@ -249,7 +327,7 @@ public sealed class MacBinary : IFilter
var hdrB = new byte[128];
stream.EnsureRead(hdrB, 0, 128);
_header = Marshal.ByteArrayToStructureBigEndian<Header>(hdrB);
_header = Marshal.ByteArrayToStructureBigEndianGenerated<Header>(hdrB);
uint blocks = 1;
blocks += (uint)(_header.secondaryHeaderLength / 128);
@@ -282,7 +360,7 @@ public sealed class MacBinary : IFilter
var hdrB = new byte[128];
fs.EnsureRead(hdrB, 0, 128);
_header = Marshal.ByteArrayToStructureBigEndian<Header>(hdrB);
_header = Marshal.ByteArrayToStructureBigEndianGenerated<Header>(hdrB);
uint blocks = 1;
blocks += (uint)(_header.secondaryHeaderLength / 128);
@@ -307,81 +385,5 @@ public sealed class MacBinary : IFilter
return ErrorNumber.NoError;
}
#endregion
#region Nested type: Header
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct Header
{
/// <summary>0x00, MacBinary version, 0</summary>
public readonly byte version;
/// <summary>0x01, Str63 Pascal filename</summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
public readonly byte[] filename;
/// <summary>0x41, File type</summary>
public readonly uint type;
/// <summary>0x45, File creator</summary>
public readonly uint creator;
/// <summary>0x49, High byte of Finder flags</summary>
public readonly byte finderFlags;
/// <summary>0x4A, Must be 0</summary>
public readonly byte zero1;
/// <summary>0x4B, File's icon vertical position within its window</summary>
public readonly ushort verticalPosition;
/// <summary>0x4D, File's icon horizontal position within its window</summary>
public readonly ushort horizontalPosition;
/// <summary>0x4F, File's window or folder ID</summary>
public readonly short windowID;
/// <summary>0x51, Protected flag</summary>
public readonly byte protect;
/// <summary>0x52, Must be 0</summary>
public readonly byte zero2;
/// <summary>0x53, Size of data fork</summary>
public readonly uint dataLength;
/// <summary>0x57, Size of resource fork</summary>
public readonly uint resourceLength;
/// <summary>0x5B, File's creation time</summary>
public readonly uint creationTime;
/// <summary>0x5F, File's last modified time</summary>
public readonly uint modificationTime;
/// <summary>0x63, Length of Get Info comment</summary>
public readonly ushort commentLength;
/// <summary>0x65, Low byte of Finder flags</summary>
public readonly byte finderFlags2;
#region MacBinary III
/// <summary>0x66, magic identifier, "mBIN"</summary>
public readonly uint magic;
/// <summary>0x6A, fdScript from fxInfo, identifies codepage of filename</summary>
public readonly byte fdScript;
/// <summary>0x6B, fdXFlags from fxInfo, extended Mac OS 8 finder flags</summary>
public readonly byte fdXFlags;
#endregion MacBinary III
/// <summary>0x6C, unused</summary>
public readonly ulong reserved;
/// <summary>0x74, Total unpacked files</summary>
public readonly uint totalPackedFiles;
#region MacBinary II
/// <summary>0x78, Length of secondary header</summary>
public readonly ushort secondaryHeaderLength;
/// <summary>0x7A, version number of MacBinary that wrote this file, starts at 129</summary>
public readonly byte version2;
/// <summary>0x7B, version number of MacBinary required to open this file, starts at 129</summary>
public readonly byte minVersion;
/// <summary>0x7C, CRC of previous bytes</summary>
public readonly short crc;
#endregion MacBinary II
/// <summary>0x7E, Reserved for computer type and OS ID</summary>
public readonly short computerID;
}
#endregion
}