using System.IO;
using System.Runtime.InteropServices;

namespace MindPowerSdk
{
    public static class StructReader
    {
        public static T ReadStruct<T>(BinaryReader reader)
        {
            byte[] bytes = reader.ReadBytes(Marshal.SizeOf(typeof(T)));

            GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
            T theStructure = (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T));
            handle.Free();

            return theStructure;
        }

        public static T ReadStructFromArray<T>(byte[] bytes)
        {
            GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
            T theStructure = (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T));
            handle.Free();
            return theStructure;
        }

        public static T[] ReadStructArray<T>(BinaryReader reader, int size)
        {
            T[] theStructures = new T[size];

            for (int i = 0; i < size; i++)
            {
                theStructures[i] = ReadStruct<T>(reader);
            }

            return theStructures;
        }

        public static T[] ReadStructArray<T>(BinaryReader reader, uint size)
        {
            T[] theStructures = new T[size];

            for (uint i = 0; i < size; i++)
            {
                theStructures[i] = ReadStruct<T>(reader);
            }

            return theStructures;
        }
    }
}