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Add Int128 extensions for BinaryReader

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This commit is contained in:
Matt Nadareski
2024-04-22 15:22:14 -04:00
parent c824db6b18
commit fc10565186
2 changed files with 99 additions and 13 deletions
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44
SabreTools.IO.Test/Extensions/BinaryReaderExtensionsTests.cs
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@@ -108,6 +108,50 @@ namespace SabreTools.IO.Test.Extensions
Assert.Equal(expected, read);
}
#if NET7_0_OR_GREATER
[Fact]
public void ReadInt128Test()
{
var stream = new MemoryStream(_bytes);
var br = new BinaryReader(stream);
var expected = new Int128(BitConverter.ToUInt64(_bytes, 0), BitConverter.ToUInt64(_bytes, 8));
Int128 read = br.ReadInt128();
Assert.Equal(expected, read);
}
[Fact]
public void ReadInt128BigEndianTest()
{
var stream = new MemoryStream(_bytes);
var br = new BinaryReader(stream);
var reversed = _bytes.Reverse().ToArray();
var expected = new Int128(BitConverter.ToUInt64(reversed, 0), BitConverter.ToUInt64(reversed, 8));
Int128 read = br.ReadInt128BigEndian();
Assert.Equal(expected, read);
}
[Fact]
public void ReadUInt128Test()
{
var stream = new MemoryStream(_bytes);
var br = new BinaryReader(stream);
var expected = new UInt128(BitConverter.ToUInt64(_bytes, 0), BitConverter.ToUInt64(_bytes, 8));
UInt128 read = br.ReadUInt128();
Assert.Equal(expected, read);
}
[Fact]
public void ReadUInt128BigEndianTest()
{
var stream = new MemoryStream(_bytes);
var br = new BinaryReader(stream);
var reversed = _bytes.Reverse().ToArray();
var expected = new UInt128(BitConverter.ToUInt64(reversed, 0), BitConverter.ToUInt64(reversed, 8));
UInt128 read = br.ReadUInt128BigEndian();
Assert.Equal(expected, read);
}
#endif
// TODO: Add byte[], char[] tests
// TODO: Add string reading tests
}

68
SabreTools.IO/Extensions/BinaryReaderExtensions.cs
View File

@@ -7,7 +7,6 @@ namespace SabreTools.IO.Extensions
/// Big endian reading overloads for BinaryReader
/// </summary>
/// <remarks>TODO: Add U/Int24 and U/Int48 methods</remarks>
/// <remarks>TODO: Add U/Int128 methods</remarks>
public static class BinaryReaderExtensions
{
/// <inheritdoc cref="BinaryReader.Read(byte[], int, int)"/>
@@ -117,6 +116,21 @@ namespace SabreTools.IO.Extensions
return BitConverter.ToDouble(retval, 0);
}
/// <inheritdoc cref="BinaryReader.ReadDecimal"/>
/// <remarks>Reads in big-endian format</remarks>
public static decimal ReadDecimalBigEndian(this BinaryReader reader)
{
byte[] retval = reader.ReadBytes(16);
Array.Reverse(retval);
int i1 = BitConverter.ToInt32(retval, 0);
int i2 = BitConverter.ToInt32(retval, 4);
int i3 = BitConverter.ToInt32(retval, 8);
int i4 = BitConverter.ToInt32(retval, 12);
return new decimal([i1, i2, i3, i4]);
}
/// <summary>
/// Read a Guid from the underlying stream
/// </summary>
@@ -137,19 +151,47 @@ namespace SabreTools.IO.Extensions
return new Guid(buffer);
}
/// <inheritdoc cref="BinaryReader.ReadDecimal"/>
/// <remarks>Reads in big-endian format</remarks>
public static decimal ReadDecimalBigEndian(this BinaryReader reader)
// TODO: Determine if the reverse reads are doing what are expected
#if NET7_0_OR_GREATER
/// <summary>
/// Read an Int128 from the underlying stream
/// </summary>
public static Int128 ReadInt128(this BinaryReader reader)
{
byte[] retval = reader.ReadBytes(16);
Array.Reverse(retval);
int i1 = BitConverter.ToInt32(retval, 0);
int i2 = BitConverter.ToInt32(retval, 4);
int i3 = BitConverter.ToInt32(retval, 8);
int i4 = BitConverter.ToInt32(retval, 12);
return new decimal([i1, i2, i3, i4]);
byte[] buffer = reader.ReadBytes(16);
return new Int128(BitConverter.ToUInt64(buffer, 0), BitConverter.ToUInt64(buffer, 8));
}
/// <summary>
/// Read an Int128 from the underlying stream
/// </summary>
/// <remarks>Reads in big-endian format</remarks>
public static Int128 ReadInt128BigEndian(this BinaryReader reader)
{
byte[] buffer = reader.ReadBytes(16);
Array.Reverse(buffer);
return new Int128(BitConverter.ToUInt64(buffer, 0), BitConverter.ToUInt64(buffer, 8));
}
/// <summary>
/// Read a UInt128 from the underlying stream
/// </summary>
public static UInt128 ReadUInt128(this BinaryReader reader)
{
byte[] buffer = reader.ReadBytes(16);
return new UInt128(BitConverter.ToUInt64(buffer, 0), BitConverter.ToUInt64(buffer, 8));
}
/// <summary>
/// Read a UInt128 from the underlying stream
/// </summary>
/// <remarks>Reads in big-endian format</remarks>
public static UInt128 ReadUInt128BigEndian(this BinaryReader reader)
{
byte[] buffer = reader.ReadBytes(16);
Array.Reverse(buffer);
return new UInt128(BitConverter.ToUInt64(buffer, 0), BitConverter.ToUInt64(buffer, 8));
}
#endif
}
}