1 files changed, 63 insertions, 0 deletions
diff --git a/src/Ryujinx.Cpu/MemoryHelper.cs b/src/Ryujinx.Cpu/MemoryHelper.cs
new file mode 100644
index 00000000..194a0c35
--- /dev/null
+++ b/src/Ryujinx.Cpu/MemoryHelper.cs
@@ -0,0 +1,63 @@
+using Microsoft.IO;
+using Ryujinx.Common.Memory;
+using Ryujinx.Memory;
+using System;
+using System.IO;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace Ryujinx.Cpu
+{
+    public static class MemoryHelper
+    {
+        public static void FillWithZeros(IVirtualMemoryManager memory, ulong position, int size)
+        {
+            int size8 = size & ~(8 - 1);
+
+            for (int offs = 0; offs < size8; offs += 8)
+            {
+                memory.Write<long>(position + (ulong)offs, 0);
+            }
+
+            for (int offs = size8; offs < (size - size8); offs++)
+            {
+                memory.Write<byte>(position + (ulong)offs, 0);
+            }
+        }
+
+        public unsafe static T Read<T>(IVirtualMemoryManager memory, ulong position) where T : unmanaged
+        {
+            return MemoryMarshal.Cast<byte, T>(memory.GetSpan(position, Unsafe.SizeOf<T>()))[0];
+        }
+
+        public unsafe static ulong Write<T>(IVirtualMemoryManager memory, ulong position, T value) where T : unmanaged
+        {
+            ReadOnlySpan<byte> data = MemoryMarshal.Cast<T, byte>(MemoryMarshal.CreateReadOnlySpan(ref value, 1));
+
+            memory.Write(position, data);
+
+            return (ulong)data.Length;
+        }
+
+        public static string ReadAsciiString(IVirtualMemoryManager memory, ulong position, long maxSize = -1)
+        {
+            using (RecyclableMemoryStream ms = MemoryStreamManager.Shared.GetStream())
+            {
+                for (long offs = 0; offs < maxSize || maxSize == -1; offs++)
+                {
+                    byte value = memory.Read<byte>(position + (ulong)offs);
+
+                    if (value == 0)
+                    {
+                        break;
+                    }
+
+                    ms.WriteByte(value);
+                }
+
+                return Encoding.ASCII.GetString(ms.GetReadOnlySequence());
+            }
+        }
+    }
+}
+\ No newline at end of file