mirror of
https://github.com/claunia/SabreTools.git
synced 2025-12-16 19:14:27 +00:00
Add .NET 9 to target frameworks
This commit is contained in:
Matt Nadareski
@@ -1,7 +1,4 @@
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using System;
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using System.IO;
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using System.Text;
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using SabreTools.IO.Extensions;
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using System.IO;
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using SabreTools.Models.CHD;
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namespace SabreTools.FileTypes.CHD
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@@ -41,17 +38,14 @@ namespace SabreTools.FileTypes.CHD
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{
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try
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{
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// Get the detected CHD version
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uint version = GetVersion(stream);
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// Read and return the current CHD
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return version switch
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var header = Serialization.Deserializers.CHD.DeserializeStream(stream);
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return header switch
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{
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1 => DeserializeV1(stream),
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2 => DeserializeV2(stream),
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3 => DeserializeV3(stream),
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4 => DeserializeV4(stream),
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5 => DeserializeV5(stream),
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HeaderV1 v1 => new CHDFile { _header = header, MD5 = v1.MD5 },
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HeaderV2 v2 => new CHDFile { _header = header, MD5 = v2.MD5 },
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HeaderV3 v3 => new CHDFile { _header = header, MD5 = v3.MD5, SHA1 = v3.SHA1 },
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HeaderV4 v4 => new CHDFile { _header = header, SHA1 = v4.SHA1 },
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HeaderV5 v5 => new CHDFile { _header = header, SHA1 = v5.SHA1 },
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_ => null,
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};
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}
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@@ -62,213 +56,5 @@ namespace SabreTools.FileTypes.CHD
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}
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#endregion
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#region Deserializers
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/// <summary>
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/// Parse and validate the header as if it's V1
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/// </summary>
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private static CHDFile? DeserializeV1(Stream stream)
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{
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var header = new HeaderV1();
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byte[] tagBytes = stream.ReadBytes(8);
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header.Tag = Encoding.ASCII.GetString(tagBytes);
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if (header.Tag != Constants.SignatureString)
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return null;
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header.Length = stream.ReadUInt32BigEndian();
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if (header.Length != Constants.HeaderV1Size)
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return null;
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header.Version = stream.ReadUInt32BigEndian();
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header.Flags = (Flags)stream.ReadUInt32BigEndian();
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header.Compression = (CompressionType)stream.ReadUInt32BigEndian();
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if (header.Compression > CompressionType.CHDCOMPRESSION_ZLIB)
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return null;
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header.HunkSize = stream.ReadUInt32BigEndian();
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header.TotalHunks = stream.ReadUInt32BigEndian();
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header.Cylinders = stream.ReadUInt32BigEndian();
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header.Heads = stream.ReadUInt32BigEndian();
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header.Sectors = stream.ReadUInt32BigEndian();
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header.MD5 = stream.ReadBytes(16);
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header.ParentMD5 = stream.ReadBytes(16);
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return new CHDFile { _header = header, MD5 = header.MD5 };
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}
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/// <summary>
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/// Parse and validate the header as if it's V2
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/// </summary>
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private static CHDFile? DeserializeV2(Stream stream)
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{
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var header = new HeaderV2();
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byte[] tagBytes = stream.ReadBytes(8);
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header.Tag = Encoding.ASCII.GetString(tagBytes);
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if (header.Tag != Constants.SignatureString)
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return null;
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header.Length = stream.ReadUInt32BigEndian();
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if (header.Length != Constants.HeaderV2Size)
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return null;
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header.Version = stream.ReadUInt32BigEndian();
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header.Flags = (Flags)stream.ReadUInt32BigEndian();
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header.Compression = (CompressionType)stream.ReadUInt32BigEndian();
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if (header.Compression > CompressionType.CHDCOMPRESSION_ZLIB)
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return null;
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header.HunkSize = stream.ReadUInt32BigEndian();
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header.TotalHunks = stream.ReadUInt32BigEndian();
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header.Cylinders = stream.ReadUInt32BigEndian();
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header.Heads = stream.ReadUInt32BigEndian();
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header.Sectors = stream.ReadUInt32BigEndian();
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header.MD5 = stream.ReadBytes(16);
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header.ParentMD5 = stream.ReadBytes(16);
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header.BytesPerSector = stream.ReadUInt32BigEndian();
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return new CHDFile { _header = header, MD5 = header.MD5 };
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}
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/// <summary>
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/// Parse and validate the header as if it's V2
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/// </summary>
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private static CHDFile? DeserializeV3(Stream stream)
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{
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var header = new HeaderV3();
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byte[] tagBytes = stream.ReadBytes(8);
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header.Tag = Encoding.ASCII.GetString(tagBytes);
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if (header.Tag != Constants.SignatureString)
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return null;
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header.Length = stream.ReadUInt32BigEndian();
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if (header.Length != Constants.HeaderV3Size)
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return null;
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header.Version = stream.ReadUInt32BigEndian();
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header.Flags = (Flags)stream.ReadUInt32BigEndian();
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header.Compression = (CompressionType)stream.ReadUInt32BigEndian();
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if (header.Compression > CompressionType.CHDCOMPRESSION_ZLIB_PLUS)
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return null;
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header.TotalHunks = stream.ReadUInt32BigEndian();
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header.LogicalBytes = stream.ReadUInt64BigEndian();
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header.MetaOffset = stream.ReadUInt64BigEndian();
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header.MD5 = stream.ReadBytes(16);
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header.ParentMD5 = stream.ReadBytes(16);
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header.HunkBytes = stream.ReadUInt32BigEndian();
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header.SHA1 = stream.ReadBytes(20);
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header.ParentSHA1 = stream.ReadBytes(20);
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return new CHDFile { _header = header, MD5 = header.MD5, SHA1 = header.SHA1 };
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}
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/// <summary>
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/// Parse and validate the header as if it's V4
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/// </summary>
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private static CHDFile? DeserializeV4(Stream stream)
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{
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var header = new HeaderV4();
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byte[] tagBytes = stream.ReadBytes(8);
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header.Tag = Encoding.ASCII.GetString(tagBytes);
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if (header.Tag != Constants.SignatureString)
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return null;
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header.Length = stream.ReadUInt32BigEndian();
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if (header.Length != Constants.HeaderV4Size)
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return null;
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header.Version = stream.ReadUInt32BigEndian();
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header.Flags = (Flags)stream.ReadUInt32BigEndian();
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header.Compression = (CompressionType)stream.ReadUInt32BigEndian();
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if (header.Compression > CompressionType.CHDCOMPRESSION_AV)
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return null;
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header.TotalHunks = stream.ReadUInt32BigEndian();
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header.LogicalBytes = stream.ReadUInt64BigEndian();
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header.MetaOffset = stream.ReadUInt64BigEndian();
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header.HunkBytes = stream.ReadUInt32BigEndian();
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header.SHA1 = stream.ReadBytes(20);
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header.ParentSHA1 = stream.ReadBytes(20);
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header.RawSHA1 = stream.ReadBytes(20);
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return new CHDFile { _header = header, SHA1 = header.SHA1 };
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}
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/// <summary>
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/// Parse and validate the header as if it's V5
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/// </summary>
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private static CHDFile? DeserializeV5(Stream stream)
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{
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var header = new HeaderV5();
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byte[] tagBytes = stream.ReadBytes(8);
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header.Tag = Encoding.ASCII.GetString(tagBytes);
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if (header.Tag != Constants.SignatureString)
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return null;
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header.Length = stream.ReadUInt32BigEndian();
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if (header.Length != Constants.HeaderV5Size)
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return null;
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header.Version = stream.ReadUInt32BigEndian();
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header.Compressors = new uint[4];
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for (int i = 0; i < header.Compressors.Length; i++)
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{
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header.Compressors[i] = stream.ReadUInt32BigEndian();
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}
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header.LogicalBytes = stream.ReadUInt64BigEndian();
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header.MapOffset = stream.ReadUInt64BigEndian();
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header.MetaOffset = stream.ReadUInt64BigEndian();
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header.HunkBytes = stream.ReadUInt32BigEndian();
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header.UnitBytes = stream.ReadUInt32BigEndian();
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header.RawSHA1 = stream.ReadBytes(20);
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header.SHA1 = stream.ReadBytes(20);
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header.ParentSHA1 = stream.ReadBytes(20);
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return new CHDFile { _header = header, SHA1 = header.SHA1 };
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}
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#endregion
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#region Helpers
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/// <summary>
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/// Get the matching CHD version, if possible
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/// </summary>
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/// <returns>Matching version, 0 if none</returns>
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private static uint GetVersion(Stream stream)
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{
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// Read the header values
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byte[] tagBytes = stream.ReadBytes(8);
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string tag = Encoding.ASCII.GetString(tagBytes);
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uint length = stream.ReadUInt32BigEndian();
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uint version = stream.ReadUInt32BigEndian();
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// Seek back to start
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stream.SeekIfPossible();
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// Check the signature
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if (!string.Equals(tag, Constants.SignatureString, StringComparison.Ordinal))
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return 0;
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// Match the version to header length
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return (version, length) switch
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{
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(1, Constants.HeaderV1Size) => version,
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(2, Constants.HeaderV2Size) => version,
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(3, Constants.HeaderV3Size) => version,
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(4, Constants.HeaderV4Size) => version,
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(5, Constants.HeaderV5Size) => version,
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_ => 0,
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};
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}
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#endregion
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}
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}
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