import ctypes
import sys


if sys.platform.startswith('win'):
    _mslib = ctypes.CDLL('libms.dll')
else:
    _mslib = ctypes.CDLL('libms.so')


def mergesort(arr):
    size = len(arr)
    IntArr = ctypes.c_int * size
    x = IntArr(*arr)
    foo = _mslib.mymergesort(x, size)
    del arr[:]
    arr.extend(x)
    return foo

def mergesortp(arr, cnt):
    size = len(arr)
    IntArr = ctypes.c_int * size
    x = IntArr(*arr)
    foo = _mslib.mymergesortp(x, size, cnt)
    del arr[:]
    arr.extend(x)
    return foo