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import sys
#
# This is only a demo based on the GMP library.
# There is a rather more complete (but perhaps outdated) version available at:
# http://bazaar.launchpad.net/~tolot-solar-empire/+junk/gmpy_cffi/files
#
try:
from _gmp_cffi import ffi, lib
except ImportError:
print 'run gmp_build first, then make sure the shared object is on sys.path'
sys.exit(1)
# ffi "knows" about the declared variables and functions from the
# cdef parts of the module created from gmp_build
# lib "knows" how to call the functions from the set_source parts
# of the module.
# ____________________________________________________________
a = ffi.new("mpz_t")
b = ffi.new("mpz_t")
if len(sys.argv) < 3:
print 'call as %s bigint1, bigint2' % sys.argv[0]
sys.exit(2)
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)
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