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136 lines
3.7 KiB
136 lines
3.7 KiB
/***********************************************************************
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* Software License Agreement (BSD License)
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*
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* Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
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* Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE NNIndexGOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*************************************************************************/
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#ifndef FLANN_SAVING_H_
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#define FLANN_SAVING_H_
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#include <cstring>
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#include <vector>
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#include <stdio.h>
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#include "FLANN/general.h"
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#include "FLANN/util/serialization.h"
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#ifdef FLANN_SIGNATURE_
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#undef FLANN_SIGNATURE_
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#endif
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#define FLANN_SIGNATURE_ "FLANN_INDEX_v1.1"
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namespace flann
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{
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/**
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* Structure representing the index header.
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*/
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struct IndexHeader
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{
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IndexHeaderStruct h;
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IndexHeader()
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{
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memset(h.signature, 0, sizeof(h.signature));
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strcpy(h.signature, FLANN_SIGNATURE_);
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memset(h.version, 0, sizeof(h.version));
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strcpy(h.version, FLANN_VERSION_);
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h.compression = 0;
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h.first_block_size = 0;
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}
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private:
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template<typename Archive>
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void serialize(Archive& ar)
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{
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ar & h.signature;
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ar & h.version;
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ar & h.data_type;
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ar & h.index_type;
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ar & h.rows;
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ar & h.cols;
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ar & h.compression;
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ar & h.first_block_size;
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}
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friend struct serialization::access;
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};
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/**
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* Saves index header to stream
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*
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* @param stream - Stream to save to
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* @param index - The index to save
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*/
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template<typename Index>
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void save_header(FILE* stream, const Index& index)
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{
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IndexHeader header;
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header.h.data_type = flann_datatype_value<typename Index::ElementType>::value;
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header.h.index_type = index.getType();
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header.h.rows = index.size();
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header.h.cols = index.veclen();
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fwrite(&header, sizeof(header),1,stream);
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}
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/**
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*
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* @param stream - Stream to load from
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* @return Index header
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*/
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inline IndexHeader load_header(FILE* stream)
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{
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IndexHeader header;
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int read_size = fread(&header,sizeof(header),1,stream);
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if (read_size != 1) {
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throw FLANNException("Invalid index file, cannot read");
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}
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if (strncmp(header.h.signature,
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FLANN_SIGNATURE_,
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strlen(FLANN_SIGNATURE_) - strlen("v0.0")) != 0) {
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throw FLANNException("Invalid index file, wrong signature");
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}
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return header;
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}
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namespace serialization
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{
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ENUM_SERIALIZER(flann_algorithm_t);
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ENUM_SERIALIZER(flann_centers_init_t);
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ENUM_SERIALIZER(flann_log_level_t);
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ENUM_SERIALIZER(flann_datatype_t);
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}
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}
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#endif /* FLANN_SAVING_H_ */
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