Here is a summary of what I did with numpy and the dll
I have verified that the values entering the last dll call (dl.cfunction) are
identical across platforms.
The c function has a signature as follows:
int cfunction(int len_data, float* data, int* ac, int num_ac,
int flag1, int flag2, int flag3, float* param,
float* out)
and in python:
import numpy as np
import ctypes as ct
dl = ct.cdll.LoadLibrary('xxx.dylib')
# data, ac, param are loaded from somewhere else.
data = np.atleast_2d(np.float32(data))
ac = np.atleast_2d(np.int32(a)) if a else np.zeros((2, 1), dtype=np.int32)
param = np.atleast_2d(np.float32(param))
flag1 = True
flag2 = True
flag3 = True
num_ac = ac.shape[1]
len_data = data.shape[1]
num_inc = len_data//200
out = np.zeros((2, num_inc), dtype=np.float32)
pt_param = param.ctypes.data_as(cf) if param else None
cf = ct.POINTER(ct.c_float)
dl.cfunction(len_data, data.ctypes.data_as(cf),
ac.ctypes.data_as(ct.POINTER(ct.c_int)),
num_ac, flag1+0, flag2+0, flag3+0,
pt_param, out.ctypes.data_as(cf))
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