C#調用C++ memcpy實現各種參數類型的記憶體拷貝

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using System;using System.Runtime.InteropServices;using System.IO;namespace tx{    struct ST    {       public char c1;       public int x;       public int y;    }    class Ct    {        [DllImport("msvcrt.dll", EntryPoint = "memcpy", CallingConvention = CallingConvention.Cdecl, SetLastError = false)]        public static extern void MemCopy(byte[] dest, byte[] src, int count);//位元組數組到位元組數組的拷貝        [DllImport("msvcrt.dll", EntryPoint = "memcpy", CallingConvention = CallingConvention.Cdecl, SetLastError = false)]        public static extern void MemCopy(int[] dest, byte[] src, int count);//位元組數組到整形數組的拷貝        [DllImport("msvcrt.dll", EntryPoint = "memcpy", CallingConvention = CallingConvention.Cdecl, SetLastError = false)]        public unsafe static extern void MemCopy(ref ST dest, byte[] src, int count);//注意只有結構體能這麼做,class不可以        static void Main(string[] args)        {            //測試----------------------------------------------            var ms = new MemoryStream();            BinaryWriter writer = new BinaryWriter(ms);            writer.Write((byte)‘a‘);            writer.Write((byte)‘b‘);            writer.Write((byte)‘c‘);            writer.Write((byte)‘d‘);            writer.Write((Int32)10);            writer.Write((Int32)30);            var len = ms.Length;            int[] bs = new int[len/4];            byte[] bss = new byte[len];            byte[] buf = ms.GetBuffer();            var ot = new ST();            MemCopy(bs, buf, (int)len);            MemCopy(bss, buf, (int)len);            MemCopy(ref ot, buf, (int)len);//注意只有結構體能這麼做,class不可以        }    }}

 

C#調用C++ memcpy實現各種參數類型的記憶體拷貝