SabreTools/BinaryObjectScanner
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Add MS-CAB OpenNext and OpenPrevious helpers

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This commit is contained in:
Matt Nadareski
2025-07-28 13:25:33 -04:00
parent be50d1343e
commit 18b89543ef
1 changed files with 62 additions and 0 deletions
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62
BinaryObjectScanner/FileType/MicrosoftCAB.cs
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@@ -210,5 +210,67 @@ namespace BinaryObjectScanner.FileType
_ => (int)file.FolderIndex,
};
}
/// <summary>
/// Open the next archive, if possible
/// </summary>
private SabreTools.Serialization.Wrappers.MicrosoftCabinet? OpenNext(SabreTools.Serialization.Wrappers.MicrosoftCabinet cabArchive, string? file)
{
// Ignore invalid archives
if (cabArchive.Model.Header == null)
return null;
// Normalize the filename, if one exists
if (file != null)
file = Path.GetFullPath(file);
// Get if the cabinet has a next part
string? next = cabArchive.Model.Header.CabinetNext;
if (string.IsNullOrEmpty(next))
return null;
// Get the full next path, if possible
if (file != null)
{
string? folder = Path.GetDirectoryName(file);
if (folder != null)
next = Path.Combine(folder, next);
}
// Open and return the next cabinet
var fs = File.Open(next, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
return SabreTools.Serialization.Wrappers.MicrosoftCabinet.Create(fs);
}
/// <summary>
/// Open the previous archive, if possible
/// </summary>
private SabreTools.Serialization.Wrappers.MicrosoftCabinet? OpenPrevious(SabreTools.Serialization.Wrappers.MicrosoftCabinet cabArchive, string? file)
{
// Ignore invalid archives
if (cabArchive.Model.Header == null)
return null;
// Normalize the filename, if one exists
if (file != null)
file = Path.GetFullPath(file);
// Get if the cabinet has a previous part
string? prev = cabArchive.Model.Header.CabinetPrev;
if (string.IsNullOrEmpty(prev))
return null;
// Get the full previous path, if possible
if (file != null)
{
string? folder = Path.GetDirectoryName(file);
if (folder != null)
prev = Path.Combine(folder, prev);
}
// Open and return the previous cabinet
var fs = File.Open(prev, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
return SabreTools.Serialization.Wrappers.MicrosoftCabinet.Create(fs);
}
}
}