FMOD.Studio.MarshallingHelper.stringLengthUtf8 C# (CSharp) Method

        public static int stringLengthUtf8(IntPtr nativeUtf8)
        {
            int len = 0;
            while (Marshal.ReadByte(nativeUtf8, len) != 0) ++len;

            return len;
        }

 public void assign(out SOUND_INFO publicInfo)
 {
     publicInfo        = new SOUND_INFO();
     publicInfo.mode   = this.mode;
     publicInfo.exinfo = this.exinfo;
     publicInfo.exinfo.inclusionlist = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(int)));
     Marshal.WriteInt32(publicInfo.exinfo.inclusionlist, this.subsoundIndex);
     publicInfo.exinfo.inclusionlistnum = 1;
     publicInfo.subsoundIndex           = this.subsoundIndex;
     if (this.name_or_data != IntPtr.Zero)
     {
         int num;
         int num2;
         if ((this.mode & (MODE.OPENMEMORY | MODE.OPENMEMORY_POINT)) != MODE.DEFAULT)
         {
             publicInfo.mode = ((publicInfo.mode & ~MODE.OPENMEMORY_POINT) | MODE.OPENMEMORY);
             num             = (int)this.exinfo.fileoffset;
             publicInfo.exinfo.fileoffset = 0u;
             num2 = (int)this.exinfo.length;
         }
         else
         {
             num  = 0;
             num2 = MarshallingHelper.stringLengthUtf8(this.name_or_data) + 1;
         }
         publicInfo.name_or_data = new byte[num2];
         Marshal.Copy(new IntPtr(this.name_or_data.ToInt64() + (long)num), publicInfo.name_or_data, 0, num2);
     }
     else
     {
         publicInfo.name_or_data = null;
     }
 }