mirror of
https://github.com/Ryujinx/Ryujinx.git
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76 lines
2.1 KiB
C#
76 lines
2.1 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.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, long 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>((ulong)(position + 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>((ulong)(position + offs), 0);
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}
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}
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public unsafe static T Read<T>(IVirtualMemoryManager memory, long position) where T : struct
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{
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long size = Marshal.SizeOf<T>();
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byte[] data = new byte[size];
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memory.Read((ulong)position, data);
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fixed (byte* ptr = data)
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{
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return Marshal.PtrToStructure<T>((IntPtr)ptr);
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}
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}
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public unsafe static long Write<T>(IVirtualMemoryManager memory, long position, T value) where T : struct
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{
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long size = Marshal.SizeOf<T>();
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byte[] data = new byte[size];
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fixed (byte* ptr = data)
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{
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Marshal.StructureToPtr<T>(value, (IntPtr)ptr, false);
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}
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memory.Write((ulong)position, data);
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return size;
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}
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public static string ReadAsciiString(IVirtualMemoryManager memory, long 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>((ulong)(position + 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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} |