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120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The libLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the libLTE library.
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*
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* libLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* libLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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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 <strings.h>
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#include <unistd.h>
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#include <math.h>
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#include <time.h>
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#include "lte.h"
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#include "crc_test.h"
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int num_bits = 1000, crc_length = 16;
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unsigned int crc_poly = 0x11021;
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unsigned int seed = 0;
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void usage(char *prog) {
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printf("Usage: %s [nlps]\n", prog);
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printf("\t-n num_bits [Default %d]\n", num_bits);
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printf("\t-l crc_length [Default %d]\n", crc_length);
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printf("\t-p crc_poly (Hex) [Default 0x%x]\n", crc_poly);
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printf("\t-s seed [Default 0=time]\n");
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}
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void parse_args(int argc, char **argv) {
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int opt;
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while ((opt = getopt(argc, argv, "nlps")) != -1) {
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switch (opt) {
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case 'n':
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num_bits = atoi(argv[optind]);
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break;
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case 'l':
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crc_length = atoi(argv[optind]);
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break;
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case 'p':
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crc_poly = (unsigned int) strtoul(argv[optind], NULL, 16);
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break;
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case 's':
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seed = (unsigned int) strtoul(argv[optind], NULL, 0);
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break;
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default:
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usage(argv[0]);
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exit(-1);
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}
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}
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}
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int main(int argc, char **argv) {
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int i;
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char *data;
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unsigned int crc_word, expected_word;
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parse_args(argc, argv);
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data = malloc(sizeof(char) * (num_bits+crc_length));
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if (!data) {
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perror("malloc");
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exit(-1);
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}
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if (!seed) {
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seed = time(NULL);
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}
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srand(seed);
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// Generate data
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for (i=0;i<num_bits;i++) {
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data[i] = rand()%2;
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}
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// generate CRC word
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crc_word = crc(0, data, num_bits, crc_length, crc_poly, 1);
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// check if result is zero
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if (crc(0, data, num_bits + crc_length, crc_length, crc_poly, 0)) {
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printf("CRC check is non-zero\n");
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exit(-1);
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}
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free(data);
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printf("CRC word: 0x%x\n", crc_word);
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// check if generated word is as expected
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if (get_expected_word(num_bits, crc_length, crc_poly, seed, &expected_word)) {
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fprintf(stderr, "Test parameters not defined in test_results.h\n");
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exit(-1);
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}
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exit(expected_word != crc_word);
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}
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