gmp_libmpz_urandomm Method |
Namespace: Math.Gmp.Native
The variable state must be initialized by calling one of the gmp_randinit functions (GNU MP - Random State Initialization) before invoking this function.
The random number functions of GMP come in two groups; older function that rely on a global state, and newer functions that accept a state parameter that is read and modified. Please see the GNU MP - Random Number Functions for more information on how to use and not to use random number functions.
// Create, initialize, and seed a new random number generator. gmp_randstate_t state = new gmp_randstate_t(); gmp_lib.gmp_randinit_mt(state); gmp_lib.gmp_randseed_ui(state, 100000U); // Create, initialize, and set the value of rop to 0. mpz_t rop = new mpz_t(); gmp_lib.mpz_init(rop); // Create, initialize, and set a large integer. mpz_t n = new mpz_t(); char_ptr value = new char_ptr("123 456 789 012 345 678 901"); gmp_lib.mpz_init_set_str(n, value, 10); // Generate a random integer in the range [0, n-1]. gmp_lib.mpz_urandomm(rop, state, n); // Free all memory occupied by state, rop, and n. gmp_lib.gmp_randclear(state); gmp_lib.mpz_clears(rop, n, null);