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https://github.com/rn10950/RetroZilla.git
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71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
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* Simple test driver for MPI library
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*
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* Test 5: Other number theoretic functions
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <limits.h>
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#include "mpi.h"
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int main(int argc, char *argv[])
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{
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mp_int a, b, c, x, y;
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if(argc < 3) {
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fprintf(stderr, "Usage: %s <a> <b>\n", argv[0]);
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return 1;
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}
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printf("Test 5: Number theoretic functions\n\n");
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mp_init(&a);
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mp_init(&b);
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mp_read_radix(&a, argv[1], 10);
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mp_read_radix(&b, argv[2], 10);
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printf("a = "); mp_print(&a, stdout); fputc('\n', stdout);
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printf("b = "); mp_print(&b, stdout); fputc('\n', stdout);
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mp_init(&c);
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printf("\nc = (a, b)\n");
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mp_gcd(&a, &b, &c);
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printf("Euclid: c = "); mp_print(&c, stdout); fputc('\n', stdout);
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/*
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mp_bgcd(&a, &b, &c);
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printf("Binary: c = "); mp_print(&c, stdout); fputc('\n', stdout);
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*/
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mp_init(&x);
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mp_init(&y);
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printf("\nc = (a, b) = ax + by\n");
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mp_xgcd(&a, &b, &c, &x, &y);
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printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
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printf("x = "); mp_print(&x, stdout); fputc('\n', stdout);
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printf("y = "); mp_print(&y, stdout); fputc('\n', stdout);
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printf("\nc = a^-1 (mod b)\n");
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if(mp_invmod(&a, &b, &c) == MP_UNDEF) {
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printf("a has no inverse mod b\n");
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} else {
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printf("c = "); mp_print(&c, stdout); fputc('\n', stdout);
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}
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mp_clear(&y);
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mp_clear(&x);
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mp_clear(&c);
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mp_clear(&b);
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mp_clear(&a);
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return 0;
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}
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