import sys import cffi # # This is only a demo based on the GMP library. # There is a rather more complete version available at: # http://bazaar.launchpad.net/~tolot-solar-empire/+junk/gmpy_cffi/files # ffi = cffi.FFI() ffi.cdef(""" typedef struct { ...; } MP_INT; typedef MP_INT mpz_t[1]; int mpz_init_set_str (MP_INT *dest_integer, char *src_cstring, int base); void mpz_add (MP_INT *sum, MP_INT *addend1, MP_INT *addend2); char * mpz_get_str (char *string, int base, MP_INT *integer); """) lib = ffi.verify("#include ", libraries=['gmp', 'm']) # ____________________________________________________________ a = ffi.new("mpz_t") b = ffi.new("mpz_t") lib.mpz_init_set_str(a, sys.argv[1], 10) # Assume decimal integers lib.mpz_init_set_str(b, sys.argv[2], 10) # Assume decimal integers lib.mpz_add(a, a, b) # a=a+b s = lib.mpz_get_str(ffi.NULL, 10, a) print ffi.string(s)