63 lines
1.9 KiB
C#
63 lines
1.9 KiB
C#
// dnlib: See LICENSE.txt for more info
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using System;
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namespace dnlib.IO {
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/// <summary>
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/// Creates <see cref="DataReader"/>s that read native memory
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/// </summary>
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public sealed unsafe class NativeMemoryDataReaderFactory : DataReaderFactory {
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/// <summary>
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/// The filename or null if the data is not from a file
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/// </summary>
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public override string Filename => filename;
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/// <summary>
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/// Gets the total length of the data
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/// </summary>
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public override uint Length => length;
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DataStream stream;
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string filename;
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uint length;
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NativeMemoryDataReaderFactory(byte* data, uint length, string filename) {
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this.filename = filename;
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this.length = length;
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stream = DataStreamFactory.Create(data);
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}
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internal void SetLength(uint length) => this.length = length;
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/// <summary>
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/// Creates a <see cref="NativeMemoryDataReaderFactory"/> instance
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/// </summary>
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/// <param name="data">Pointer to data</param>
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/// <param name="length">Length of data</param>
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/// <param name="filename">The filename or null if the data is not from a file</param>
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/// <returns></returns>
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public static NativeMemoryDataReaderFactory Create(byte* data, uint length, string filename) {
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if (data is null)
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throw new ArgumentNullException(nameof(data));
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return new NativeMemoryDataReaderFactory(data, length, filename);
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}
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/// <summary>
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/// Creates a data reader
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/// </summary>
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/// <param name="offset">Offset of data</param>
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/// <param name="length">Length of data</param>
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/// <returns></returns>
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public override DataReader CreateReader(uint offset, uint length) => CreateReader(stream, offset, length);
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/// <summary>
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/// This method doesn't need to be called since this instance doesn't own the native memory
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/// </summary>
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public override void Dispose() {
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stream = EmptyDataStream.Instance;
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length = 0;
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filename = null;
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}
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}
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}
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