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Diffstat (limited to 'src/c/jerasure/Examples/reed_sol_02.c')
-rw-r--r-- | src/c/jerasure/Examples/reed_sol_02.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/c/jerasure/Examples/reed_sol_02.c b/src/c/jerasure/Examples/reed_sol_02.c new file mode 100644 index 0000000..aca446b --- /dev/null +++ b/src/c/jerasure/Examples/reed_sol_02.c @@ -0,0 +1,104 @@ +/* * + * Copyright (c) 2014, James S. Plank and Kevin Greenan + * All rights reserved. + * + * Jerasure - A C/C++ Library for a Variety of Reed-Solomon and RAID-6 Erasure + * Coding Techniques + * + * Revision 2.0: Galois Field backend now links to GF-Complete + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * - Neither the name of the University of Tennessee nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY + * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* Jerasure's authors: + + Revision 2.x - 2014: James S. Plank and Kevin M. Greenan. + Revision 1.2 - 2008: James S. Plank, Scott Simmerman and Catherine D. Schuman. + Revision 1.0 - 2007: James S. Plank. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "jerasure.h" +#include "reed_sol.h" + +#define talloc(type, num) (type *) malloc(sizeof(type)*(num)) + +static void usage(char *s) +{ + fprintf(stderr, "usage: reed_sol_02 k m w - Vandermonde matrices in GF(2^w).\n"); + fprintf(stderr, " \n"); + fprintf(stderr, " k+m must be <= 2^w. This simply prints out the \n"); + fprintf(stderr, " Vandermonde matrix in GF(2^w), and then the generator\n"); + fprintf(stderr, " matrix that is constructed from it. See [Plank-Ding-05] for\n"); + fprintf(stderr, " information on how this construction proceeds\n"); + fprintf(stderr, " \n"); + fprintf(stderr, "This demonstrates: reed_sol_extended_vandermonde_matrix()\n"); + fprintf(stderr, " reed_sol_big_vandermonde_coding_matrix()\n"); + fprintf(stderr, " reed_sol_vandermonde_coding_matrix()\n"); + fprintf(stderr, " jerasure_print_matrix()\n"); + if (s != NULL) fprintf(stderr, "%s\n", s); + exit(1); +} + +int main(int argc, char **argv) +{ + int k, w, m; + int *matrix; + + if (argc != 4) usage(NULL); + if (sscanf(argv[1], "%d", &k) == 0 || k <= 0) usage("Bad k"); + if (sscanf(argv[2], "%d", &m) == 0 || m <= 0) usage("Bad m"); + if (sscanf(argv[3], "%d", &w) == 0 || w <= 0 || w > 32) usage("Bad w"); + if (w <= 30 && k + m > (1 << w)) usage("k + m is too big"); + + matrix = reed_sol_extended_vandermonde_matrix(k+m, k, w); + + printf("<HTML><TITLE>reed_sol_02 %d %d %d</title>\n", k, m, w); + printf("<h3>reed_sol_02 %d %d %d</h3>\n", k, m, w); + printf("<pre>\n"); + printf("Extended Vandermonde Matrix:\n\n"); + jerasure_print_matrix(matrix, k+m, k, w); + printf("\n"); + + matrix = reed_sol_big_vandermonde_distribution_matrix(k+m, k, w); + printf("Vandermonde Generator Matrix (G^T):\n\n"); + jerasure_print_matrix(matrix, k+m, k, w); + printf("\n"); + + matrix = reed_sol_vandermonde_coding_matrix(k, m, w); + printf("Vandermonde Coding Matrix:\n\n"); + jerasure_print_matrix(matrix, m, k, w); + printf("\n"); + + + return 0; +} |