| /* |
| Name: findprime.c |
| Purpose: Find probable primes. |
| Author: M. J. Fromberger |
| |
| Copyright (C) 2002-2008 Michael J. Fromberger, All Rights Reserved. |
| |
| Notes: |
| Find the first prime number in sequence starting from the given value. |
| Demonstrates the use of mp_int_find_prime(). |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), to deal |
| in the Software without restriction, including without limitation the rights |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| copies of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included in |
| all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| SOFTWARE. |
| */ |
| |
| #include <stdio.h> |
| |
| #include "iprime.h" |
| |
| int main(int argc, char *argv[]) { |
| char buf[4096]; |
| mpz_t seed; |
| mp_result res; |
| |
| if (argc < 2) { |
| fprintf(stderr, "Usage: %s <start-value>\n", argv[0]); |
| return 1; |
| } |
| |
| mp_int_init(&seed); |
| if ((res = mp_int_read_string(&seed, 10, argv[1])) != MP_OK) { |
| fprintf(stderr, "%s: error reading `%s': %d\n", argv[0], argv[1], res); |
| return 2; |
| } |
| |
| if (mp_int_compare_value(&seed, 131) <= 0) { |
| fprintf(stderr, "%s: please enter a start value > 131\n", argv[0]); |
| return 1; |
| } |
| |
| if ((res = mp_int_find_prime(&seed)) != MP_TRUE) { |
| fprintf(stderr, "%s: error finding prime: %d\n", argv[0], res); |
| return 2; |
| } |
| |
| mp_int_to_string(&seed, 10, buf, sizeof(buf)); |
| printf("=> %s\n", buf); |
| |
| mp_int_clear(&seed); |
| |
| return 0; |
| } |