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Diffstat (limited to 'src/c/jerasure/Examples/jerasure_04.c')
-rw-r--r-- | src/c/jerasure/Examples/jerasure_04.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/src/c/jerasure/Examples/jerasure_04.c b/src/c/jerasure/Examples/jerasure_04.c deleted file mode 100644 index 7542133..0000000 --- a/src/c/jerasure/Examples/jerasure_04.c +++ /dev/null @@ -1,117 +0,0 @@ -/* * - * 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" - -#define talloc(type, num) (type *) malloc(sizeof(type)*(num)) - -static void usage(char *s) -{ - fprintf(stderr, "usage: jerasure_04 k w - Performs the analogous bit-matrix operations to jerasure_03.\n\n"); - fprintf(stderr, " It converts the matrix to a kw*kw bit matrix and does the same operations.\n"); - fprintf(stderr, " k must be < 2^w.\n"); - fprintf(stderr, "This demonstrates: jerasure_print_bitmatrix()\n"); - fprintf(stderr, " jerasure_matrix_to_bitmatrix()\n"); - fprintf(stderr, " jerasure_invertible_bitmatrix()\n"); - fprintf(stderr, " jerasure_invert_bitmatrix()\n"); - fprintf(stderr, " jerasure_matrix_multiply().\n"); - if (s != NULL) fprintf(stderr, "%s\n", s); - exit(1); -} - -int main(int argc, char **argv) -{ - unsigned int k, w, i, j, n; - int *matrix; - int *bitmatrix; - int *bitmatrix_copy; - int *inverse; - int *identity; - - if (argc != 3) usage(NULL); - if (sscanf(argv[1], "%d", &k) == 0 || k <= 0) usage("Bad k"); - if (sscanf(argv[2], "%d", &w) == 0 || w <= 0 || w > 31) usage("Bad w"); - if (k >= (1 << w)) usage("K too big"); - - matrix = talloc(int, k*k); - bitmatrix_copy = talloc(int, k*w*k*w); - inverse = talloc(int, k*w*k*w); - - for (i = 0; i < k; i++) { - for (j = 0; j < k; j++) { - n = i ^ ((1 << w)-1-j); - matrix[i*k+j] = (n == 0) ? 0 : galois_single_divide(1, n, w); - } - } - bitmatrix = jerasure_matrix_to_bitmatrix(k, k, w, matrix); - - printf("<HTML><TITLE>jerasure_04"); - for (i = 1; i < argc; i++) printf(" %s", argv[i]); - printf("</TITLE>\n"); - printf("<h3>jerasure_04"); - for (i = 1; i < argc; i++) printf(" %s", argv[i]); - printf("</h3>\n"); - printf("<pre>\n"); - - printf("The Cauchy Bit-Matrix:\n"); - jerasure_print_bitmatrix(bitmatrix, k*w, k*w, w); - memcpy(bitmatrix_copy, bitmatrix, sizeof(int)*k*w*k*w); - i = jerasure_invertible_bitmatrix(bitmatrix_copy, k*w); - printf("\nInvertible: %s\n", (i == 1) ? "Yes" : "No"); - if (i == 1) { - printf("\nInverse:\n"); - memcpy(bitmatrix_copy, bitmatrix, sizeof(int)*k*w*k*w); - i = jerasure_invert_bitmatrix(bitmatrix_copy, inverse, k*w); - jerasure_print_bitmatrix(inverse, k*w, k*w, w); - identity = jerasure_matrix_multiply(inverse, bitmatrix, k*w, k*w, k*w, k*w, 2); - printf("\nInverse times matrix (should be identity):\n"); - jerasure_print_bitmatrix(identity, k*w, k*w, w); - } - return 0; -} |