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refactor the file reading part

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Perfare
2021-07-02 02:17:59 +08:00
parent 4345885cc9
commit 7ab2cda120
7 changed files with 175 additions and 159 deletions
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AssetStudio/ImportHelper.cs
-60
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@@ -4,14 +4,6 @@ using System.Linq;
namespace AssetStudio
{
public enum FileType
{
AssetsFile,
BundleFile,
WebFile,
ResourceFile
}
public static class ImportHelper
{
public static void MergeSplitAssets(string path, bool allDirectories = false)
@@ -56,57 +48,5 @@ namespace AssetStudio
}
return selectFile.Distinct().ToArray();
}
public static FileType CheckFileType(Stream stream, out EndianBinaryReader reader)
{
reader = new EndianBinaryReader(stream);
return CheckFileType(reader);
}
public static FileType CheckFileType(string fileName, out EndianBinaryReader reader)
{
reader = new EndianBinaryReader(File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite));
return CheckFileType(reader);
}
private static FileType CheckFileType(EndianBinaryReader reader)
{
var signature = reader.ReadStringToNull(20);
reader.Position = 0;
switch (signature)
{
case "UnityWeb":
case "UnityRaw":
case "UnityArchive":
case "UnityFS":
return FileType.BundleFile;
case "UnityWebData1.0":
return FileType.WebFile;
default:
{
var magic = reader.ReadBytes(2);
reader.Position = 0;
if (WebFile.gzipMagic.SequenceEqual(magic))
{
return FileType.WebFile;
}
reader.Position = 0x20;
magic = reader.ReadBytes(6);
reader.Position = 0;
if (WebFile.brotliMagic.SequenceEqual(magic))
{
return FileType.WebFile;
}
if (SerializedFile.IsSerializedFile(reader))
{
return FileType.AssetsFile;
}
else
{
return FileType.ResourceFile;
}
}
}
}
}
}