diff options
Diffstat (limited to 'Ryujinx.Cpu/MemoryHelper.cs')
-rw-r--r-- | Ryujinx.Cpu/MemoryHelper.cs | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/Ryujinx.Cpu/MemoryHelper.cs b/Ryujinx.Cpu/MemoryHelper.cs new file mode 100644 index 00000000..5ba5ef38 --- /dev/null +++ b/Ryujinx.Cpu/MemoryHelper.cs @@ -0,0 +1,73 @@ +using System; +using System.IO; +using System.Runtime.InteropServices; +using System.Text; + +namespace Ryujinx.Cpu +{ + public static class MemoryHelper + { + public static void FillWithZeros(MemoryManager memory, long position, int size) + { + int size8 = size & ~(8 - 1); + + for (int offs = 0; offs < size8; offs += 8) + { + memory.Write<long>((ulong)(position + offs), 0); + } + + for (int offs = size8; offs < (size - size8); offs++) + { + memory.Write<byte>((ulong)(position + offs), 0); + } + } + + public unsafe static T Read<T>(MemoryManager memory, long position) where T : struct + { + long size = Marshal.SizeOf<T>(); + + byte[] data = new byte[size]; + + memory.Read((ulong)position, data); + + fixed (byte* ptr = data) + { + return Marshal.PtrToStructure<T>((IntPtr)ptr); + } + } + + public unsafe static void Write<T>(MemoryManager memory, long position, T value) where T : struct + { + long size = Marshal.SizeOf<T>(); + + byte[] data = new byte[size]; + + fixed (byte* ptr = data) + { + Marshal.StructureToPtr<T>(value, (IntPtr)ptr, false); + } + + memory.Write((ulong)position, data); + } + + public static string ReadAsciiString(MemoryManager memory, long position, long maxSize = -1) + { + using (MemoryStream ms = new MemoryStream()) + { + for (long offs = 0; offs < maxSize || maxSize == -1; offs++) + { + byte value = memory.Read<byte>((ulong)(position + offs)); + + if (value == 0) + { + break; + } + + ms.WriteByte(value); + } + + return Encoding.ASCII.GetString(ms.ToArray()); + } + } + } +}
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