We have something like below -
import ctypes
# load the library
pari=ctypes.cdll.LoadLibrary("libpari.so")
# set the right return type of the functions
pari.stoi.restype = ctypes.POINTER(ctypes.c_long)
pari.nextprime.restype = ctypes.POINTER(ctypes.c_long)
# initialize the library
pari.pari_init(2**19,0)
def nextprime(v):
g = pari.nextprime(pari.stoi(ctypes.c_long(v))) # nextprime(argument) is a PARI function
return pari.itos(g)
print( nextprime(456) )
For example I tried -
h=(0,0,0, 4,6)
pari.stoi.restype = ctypes.POINTER(ctypes.c_long*5)
pari.ellinit.restype = ctypes.POINTER(ctypes.c_long)
def ellinit(v):
g = pari.ellinit(pari.stoi(ctypes.c_long(v)*5))
return pari.itos(g)
print(ellinit(h))
I got below error -
File "C:\Users\miron\Desktop\trash5\x\f.py", line 68, in <module>
print( ellinit(h) )
File "C:\Users\miron\Desktop\trash5\x\f.py", line 62, in ellinit
g = pari.ellinit(pari.stoi(ctypes.c_long(v)*5))
TypeError: an integer is required (got type tuple)
How do I pass a tuple/array/vector? Thanks.
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