2 * Copyright (c) 2014, James S. Plank and Kevin Greenan
5 * Jerasure - A C/C++ Library for a Variety of Reed-Solomon and RAID-6 Erasure
8 * Revision 2.0: Galois Field backend now links to GF-Complete
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * - Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
17 * - Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
22 * - Neither the name of the University of Tennessee nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
32 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
33 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
34 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
36 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
40 /* Jerasure's authors:
42 Revision 2.x - 2014: James S. Plank and Kevin M. Greenan.
43 Revision 1.2 - 2008: James S. Plank, Scott Simmerman and Catherine D. Schuman.
44 Revision 1.0 - 2007: James S. Plank.
53 #define talloc(type, num) (type *) malloc(sizeof(type)*(num))
55 static void usage(char *s)
57 fprintf(stderr, "usage: reed_sol_02 k m w - Vandermonde matrices in GF(2^w).\n");
58 fprintf(stderr, " \n");
59 fprintf(stderr, " k+m must be <= 2^w. This simply prints out the \n");
60 fprintf(stderr, " Vandermonde matrix in GF(2^w), and then the generator\n");
61 fprintf(stderr, " matrix that is constructed from it. See [Plank-Ding-05] for\n");
62 fprintf(stderr, " information on how this construction proceeds\n");
63 fprintf(stderr, " \n");
64 fprintf(stderr, "This demonstrates: reed_sol_extended_vandermonde_matrix()\n");
65 fprintf(stderr, " reed_sol_big_vandermonde_coding_matrix()\n");
66 fprintf(stderr, " reed_sol_vandermonde_coding_matrix()\n");
67 fprintf(stderr, " jerasure_print_matrix()\n");
68 if (s != NULL) fprintf(stderr, "%s\n", s);
72 int main(int argc, char **argv)
77 if (argc != 4) usage(NULL);
78 if (sscanf(argv[1], "%d", &k) == 0 || k <= 0) usage("Bad k");
79 if (sscanf(argv[2], "%d", &m) == 0 || m <= 0) usage("Bad m");
80 if (sscanf(argv[3], "%d", &w) == 0 || w <= 0 || w > 32) usage("Bad w");
81 if (w <= 30 && k + m > (1 << w)) usage("k + m is too big");
83 matrix = reed_sol_extended_vandermonde_matrix(k+m, k, w);
85 printf("<HTML><TITLE>reed_sol_02 %d %d %d</title>\n", k, m, w);
86 printf("<h3>reed_sol_02 %d %d %d</h3>\n", k, m, w);
88 printf("Extended Vandermonde Matrix:\n\n");
89 jerasure_print_matrix(matrix, k+m, k, w);
92 matrix = reed_sol_big_vandermonde_distribution_matrix(k+m, k, w);
93 printf("Vandermonde Generator Matrix (G^T):\n\n");
94 jerasure_print_matrix(matrix, k+m, k, w);
97 matrix = reed_sol_vandermonde_coding_matrix(k, m, w);
98 printf("Vandermonde Coding Matrix:\n\n");
99 jerasure_print_matrix(matrix, m, k, w);