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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- # There is a rather more complete (but perhaps outdated) version available at: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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