/usr/include/flann/util/saving.h is in libflann-dev 1.8.4-4.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Software License Agreement (BSD License)
*
* Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
* Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE NNIndexGOODS 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.
*************************************************************************/
#ifndef FLANN_SAVING_H_
#define FLANN_SAVING_H_
#include <cstring>
#include <vector>
#include <stdio.h>
#include "flann/general.h"
#include "flann/util/serialization.h"
#ifdef FLANN_SIGNATURE_
#undef FLANN_SIGNATURE_
#endif
#define FLANN_SIGNATURE_ "FLANN_INDEX"
namespace flann
{
/**
* Structure representing the index header.
*/
struct IndexHeader
{
char signature[16];
char version[16];
flann_datatype_t data_type;
flann_algorithm_t index_type;
flann_distance_t distance_type;
size_t rows;
size_t cols;
IndexHeader()
{
memset(signature, 0, sizeof(signature));
strcpy(signature, FLANN_SIGNATURE_);
memset(version, 0, sizeof(version));
strcpy(version, FLANN_VERSION_);
}
private:
template<typename Archive>
void serialize(Archive& ar)
{
ar & signature;
ar & version;
ar & data_type;
ar & index_type;
ar & rows;
ar & cols;
}
friend struct serialization::access;
};
/**
* Saves index header to stream
*
* @param stream - Stream to save to
* @param index - The index to save
*/
template<typename Index>
void save_header(FILE* stream, const Index& index)
{
IndexHeader header;
header.data_type = flann_datatype_value<typename Index::ElementType>::value;
header.index_type = index.getType();
header.rows = index.size();
header.cols = index.veclen();
fwrite(&header, sizeof(header),1,stream);
}
/**
*
* @param stream - Stream to load from
* @return Index header
*/
inline IndexHeader load_header(FILE* stream)
{
IndexHeader header;
int read_size = fread(&header,sizeof(header),1,stream);
if (read_size!=1) {
throw FLANNException("Invalid index file, cannot read");
}
if (strcmp(header.signature,FLANN_SIGNATURE_)!=0) {
throw FLANNException("Invalid index file, wrong signature");
}
return header;
}
namespace serialization
{
ENUM_SERIALIZER(flann_algorithm_t);
ENUM_SERIALIZER(flann_centers_init_t);
ENUM_SERIALIZER(flann_log_level_t);
ENUM_SERIALIZER(flann_datatype_t);
}
}
#endif /* FLANN_SAVING_H_ */
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