2018-10-30 21:43:02 -04:00
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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 ChocolArm64.Memory
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{
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public static class MemoryHelper
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{
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public static void FillWithZeros(MemoryManager 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.WriteInt64(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.WriteByte(position + offs, 0);
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}
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}
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public unsafe static T Read<T>(MemoryManager memory, long position) where T : struct
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{
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long size = Marshal.SizeOf<T>();
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2018-11-28 17:18:09 -05:00
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byte[] data = memory.ReadBytes(position, size);
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2018-10-30 21:43:02 -04:00
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2018-11-28 17:18:09 -05:00
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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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2018-10-30 21:43:02 -04:00
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}
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public unsafe static void Write<T>(MemoryManager 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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2018-11-28 17:18:09 -05:00
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byte[] data = new byte[size];
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2018-10-30 21:43:02 -04:00
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2018-11-28 17:18:09 -05:00
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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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2018-10-30 21:43:02 -04:00
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2018-11-28 17:18:09 -05:00
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memory.WriteBytes(position, data);
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2018-10-30 21:43:02 -04:00
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}
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public static string ReadAsciiString(MemoryManager 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 = (byte)memory.ReadByte(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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}
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