opencv/3rdparty/flann/util/saving.h

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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.
*
* THE BSD LICENSE
*
* 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 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.
*************************************************************************/
#ifndef SAVING_H_
#define SAVING_H_
#include "constants.h"
#include "nn_index.h"
namespace cvflann
{
/**
* Structure representing the index header.
*/
struct IndexHeader
{
char signature[16];
int flann_version;
flann_algorithm_t index_type;
int rows;
int cols;
};
/**
* Saves index header to stream
*
* @param stream - Stream to save to
* @param index - The index to save
*/
void save_header(FILE* stream, const NNIndex& index);
/**
*
* @param stream - Stream to load from
* @return Index header
*/
IndexHeader load_header(FILE* stream);
template<typename T>
void save_value(FILE* stream, const T& value, int count = 1)
{
fwrite(&value, sizeof(value),count, stream);
}
template<typename T>
void load_value(FILE* stream, T& value, int count = 1)
{
int read_cnt = fread(&value, sizeof(value),count, stream);
if (read_cnt!=count) {
throw FLANNException("Cannot read from file");
}
}
}
#endif /* SAVING_H_ */