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* common: Make BinaryReaderExtensions Read & Write take unamanged types This allows us to not rely on Marshal.PtrToStructure and Marshal.StructureToPtr for those. * common: Make MemoryHelper Read & Write takes unamanged types * Update Marshal.SizeOf => Unsafe.SizeOf when appropriate and start moving software applet to unmanaged types
61 lines
1.8 KiB
C#
61 lines
1.8 KiB
C#
using Ryujinx.Memory;
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using System;
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using System.IO;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace Ryujinx.Cpu
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{
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public static class MemoryHelper
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{
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public static void FillWithZeros(IVirtualMemoryManager memory, ulong position, int size)
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{
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int size8 = size & ~(8 - 1);
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for (int offs = 0; offs < size8; offs += 8)
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{
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memory.Write<long>(position + (ulong)offs, 0);
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}
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for (int offs = size8; offs < (size - size8); offs++)
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{
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memory.Write<byte>(position + (ulong)offs, 0);
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}
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}
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public unsafe static T Read<T>(IVirtualMemoryManager memory, ulong position) where T : unmanaged
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{
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return MemoryMarshal.Cast<byte, T>(memory.GetSpan(position, Unsafe.SizeOf<T>()))[0];
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}
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public unsafe static ulong Write<T>(IVirtualMemoryManager memory, ulong position, T value) where T : unmanaged
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{
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ReadOnlySpan<byte> data = MemoryMarshal.Cast<T, byte>(MemoryMarshal.CreateReadOnlySpan(ref value, 1));
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memory.Write(position, data);
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return (ulong)data.Length;
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}
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public static string ReadAsciiString(IVirtualMemoryManager memory, ulong position, long maxSize = -1)
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{
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using (MemoryStream ms = new MemoryStream())
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{
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for (long offs = 0; offs < maxSize || maxSize == -1; offs++)
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{
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byte value = memory.Read<byte>(position + (ulong)offs);
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if (value == 0)
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{
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break;
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}
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ms.WriteByte(value);
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}
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return Encoding.ASCII.GetString(ms.ToArray());
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}
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}
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}
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} |