LIBFMSR
0.1
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00001 00007 /* =================================================================== 00008 Copyright (c) 2013, Henry C. H. Chen 00009 All rights reserved. 00010 00011 Redistribution and use in source and binary forms, with or without 00012 modification, are permitted provided that the following conditions are 00013 met: 00014 00015 - Redistributions of source code must retain the above copyright 00016 notice, this list of conditions and the following disclaimer. 00017 00018 - Redistributions in binary form must reproduce the above copyright 00019 notice, this list of conditions and the following disclaimer in 00020 the documentation and/or other materials provided with the 00021 distribution. 00022 00023 - Neither the name of the Chinese University of Hong Kong nor the 00024 names of its contributors may be used to endorse or promote 00025 products derived from this software without specific prior written 00026 permission. 00027 00028 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00029 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00030 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00031 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00032 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00033 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00034 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00035 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00036 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00037 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00038 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00039 =================================================================== */ 00040 00041 00042 #ifndef LIBFMSR_FMSRUTIL_H 00043 #define LIBFMSR_FMSRUTIL_H 00044 00045 #include "gf.h" 00046 00047 /* for functions below returning int, 00048 * they return 1 for yes/passed and 0 for no/failed */ 00049 00050 /* -------------------------------- */ 00051 /* | internal FMSR helper functions | */ 00052 /* -------------------------------- */ 00053 int fmsr_encode_support(gf k, gf n); 00054 int fmsr_repair_support(gf k, gf n, gf num_erasures); 00055 void fmsr_create_encode_matrix(gf k, gf n, gf *encode_matrix); 00056 void fmsr_pad_data(gf k, gf n, gf *data, size_t data_size); 00057 size_t fmsr_unpad_data(gf *data, size_t data_size); // return true size 00058 00059 00060 /* ---------------------------------- */ 00061 /* | repair-specific helper functions | */ 00062 /* ---------------------------------- */ 00063 void fmsr_calculate_lambda(gf k, gf n, gf *survivor_matrix, gf *lambda, gf select); 00064 int fmsr_check_ermds(gf k, gf n, gf *gamma, gf *lambda, gf select); 00065 int fmsr_check_mds(gf k, gf n, gf *encode_matrix); 00066 int fmsr_check_rmds(gf k, gf n, gf *encode_matrix, 00067 gf *nodes_repaired, gf num_nodes_repaired); 00068 00069 #endif /* LIBFMSR_FMSRUTIL_H */ 00070