57 lines
1.6 KiB
C#
57 lines
1.6 KiB
C#
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// dnlib: See LICENSE.txt for more info
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using System;
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using System.Diagnostics;
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using dnlib.PE;
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namespace dnlib.IO {
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/// <summary>
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/// Creates <see cref="DataStream"/>s
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/// </summary>
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public static unsafe class DataStreamFactory {
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//TODO: There are other places that use pointers that also need to be updated
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static bool supportsUnalignedAccesses = CalculateSupportsUnalignedAccesses();
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static bool CalculateSupportsUnalignedAccesses() {
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var machine = ProcessorArchUtils.GetProcessCpuArchitecture();
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switch (machine) {
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case Machine.I386:
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case Machine.AMD64:
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return true;
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case Machine.ARMNT:
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case Machine.ARM64:
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return false;
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default:
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Debug.Fail($"Unknown CPU arch: {machine}");
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return true;
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}
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}
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/// <summary>
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/// Creates a <see cref="DataStream"/> that reads from native memory
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/// </summary>
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/// <param name="data">Pointer to data</param>
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/// <returns></returns>
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public static DataStream Create(byte* data) {
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if (data is null)
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throw new ArgumentNullException(nameof(data));
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if (supportsUnalignedAccesses)
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return new UnalignedNativeMemoryDataStream(data);
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return new AlignedNativeMemoryDataStream(data);
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}
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/// <summary>
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/// Creates a <see cref="DataStream"/> that reads from a byte array
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/// </summary>
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/// <param name="data">Data</param>
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/// <returns></returns>
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public static DataStream Create(byte[] data) {
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if (data is null)
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throw new ArgumentNullException(nameof(data));
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if (supportsUnalignedAccesses)
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return new UnalignedByteArrayDataStream(data);
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return new AlignedByteArrayDataStream(data);
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}
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}
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}
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