ceph/src/erasure-code/jerasure/jerasure/include/cauchy.h

   1 /* *
   2  * Copyright (c) 2013, James S. Plank and Kevin Greenan
   3  * All rights reserved.
   4  *
   5  * Jerasure - A C/C++ Library for a Variety of Reed-Solomon and RAID-6 Erasure
   6  * Coding Techniques
   7  *
   8  * Revision 2.0: Galois Field backend now links to GF-Complete
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  *  - Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  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
  20  *    distribution.
  21  *
  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.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  39
  40
  41 extern int *cauchy_original_coding_matrix(int k, int m, int w);
  42 extern int *cauchy_xy_coding_matrix(int k, int m, int w, int *x, int *y);
  43 extern void cauchy_improve_coding_matrix(int k, int m, int w, int *matrix);
  44 extern int *cauchy_good_general_coding_matrix(int k, int m, int w);
  45 extern int cauchy_n_ones(int n, int w);