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DataBlobSignature.cs
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DataBlobSignature.cs
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using System;
using System.Buffers.Binary;
using System.Text;
using AsmResolver.IO;
using AsmResolver.PE.DotNet.Metadata.Tables.Rows;
namespace AsmResolver.DotNet.Signatures
{
/// <summary>
/// Represents a blob signature storing raw data.
/// </summary>
public class DataBlobSignature : BlobSignature
{
/// <summary>
/// Reads a single data blob signature from the provided input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <returns>The blob signature.</returns>
public static DataBlobSignature FromReader(ref BinaryStreamReader reader) => new(reader.ReadToEnd());
/// <summary>
/// Creates a new data blob signature.
/// </summary>
/// <param name="data">The raw data to store.</param>
public DataBlobSignature(byte[] data)
{
Data = data ?? throw new ArgumentNullException(nameof(data));
}
/// <summary>
/// Gets or sets the raw data stored in the blob signature.
/// </summary>
public byte[] Data
{
get;
set;
}
/// <summary>
/// Interprets the raw data stored in the <see cref="Data"/> property as a literal.
/// </summary>
/// <param name="elementType">The type of the literal.</param>
/// <returns>The deserialized literal.</returns>
public object InterpretData(ElementType elementType)
{
var reader = new BinaryStreamReader(Data);
return elementType switch
{
ElementType.Boolean => (object) (reader.ReadByte() != 0),
ElementType.Char => (char) reader.ReadUInt16(),
ElementType.I1 => reader.ReadSByte(),
ElementType.U1 => reader.ReadByte(),
ElementType.I2 => reader.ReadInt16(),
ElementType.U2 => reader.ReadUInt16(),
ElementType.I4 => reader.ReadInt32(),
ElementType.U4 => reader.ReadUInt32(),
ElementType.I8 => reader.ReadInt64(),
ElementType.U8 => reader.ReadUInt64(),
ElementType.R4 => reader.ReadSingle(),
ElementType.R8 => reader.ReadDouble(),
ElementType.String => Encoding.Unicode.GetString(reader.ReadToEnd()),
_ => throw new ArgumentOutOfRangeException(nameof(elementType))
};
}
/// <inheritdoc />
public override void Write(in BlobSerializationContext context) => context.Writer.WriteBytes(Data);
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(bool value)
{
byte[] bytes = new byte[1];
bytes[0] = (byte)(value ? 1 : 0);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(char value)
{
byte[] bytes = new byte[2];
BinaryPrimitives.WriteUInt16LittleEndian(bytes, value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(byte value)
{
byte[] bytes = new byte[1];
bytes[0] = value;
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(sbyte value)
{
byte[] bytes = new byte[1];
bytes[0] = unchecked((byte)value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(ushort value)
{
byte[] bytes = new byte[2];
BinaryPrimitives.WriteUInt16LittleEndian(bytes, value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(short value)
{
byte[] bytes = new byte[2];
BinaryPrimitives.WriteInt16LittleEndian(bytes, value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(uint value)
{
byte[] bytes = new byte[4];
BinaryPrimitives.WriteUInt32LittleEndian(bytes, value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(int value)
{
byte[] bytes = new byte[4];
BinaryPrimitives.WriteInt32LittleEndian(bytes, value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(ulong value)
{
byte[] bytes = new byte[8];
BinaryPrimitives.WriteUInt64LittleEndian(bytes, value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(long value)
{
byte[] bytes = new byte[8];
BinaryPrimitives.WriteInt64LittleEndian(bytes, value);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(float value)
{
byte[] bytes = BitConverter.GetBytes(value);
if (!BitConverter.IsLittleEndian)
Array.Reverse(bytes);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(double value)
{
byte[] bytes = BitConverter.GetBytes(value);
if (!BitConverter.IsLittleEndian)
Array.Reverse(bytes);
return new DataBlobSignature(bytes);
}
/// <summary>
/// Create a <see cref="DataBlobSignature"/> from a value
/// </summary>
/// <param name="value">The value to be converted into data</param>
/// <returns>
/// A new <see cref="DataBlobSignature"/> with the correct <see cref="Data"/>
/// </returns>
public static DataBlobSignature FromValue(string value)
{
byte[] bytes = Encoding.Unicode.GetBytes(value);
return new DataBlobSignature(bytes);
}
}
}