1 /***********************************************************************
2 * Software License Agreement (BSD License)
4 * Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
5 * Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *************************************************************************/
39 const char FLANN_SIGNATURE[] = "FLANN_INDEX";
41 void save_header(FILE* stream, const NNIndex& index)
44 memset(header.signature, 0 , sizeof(header.signature));
45 strcpy(header.signature, FLANN_SIGNATURE);
46 header.flann_version = (int)FLANN_VERSION;
47 header.index_type = index.getType();
48 header.rows = index.size();
49 header.cols = index.veclen();
51 std::fwrite(&header, sizeof(header),1,stream);
56 IndexHeader load_header(FILE* stream)
59 int read_size = fread(&header,sizeof(header),1,stream);
62 throw FLANNException("Invalid index file, cannot read");
65 if (strcmp(header.signature,FLANN_SIGNATURE)!=0) {
66 throw FLANNException("Invalid index file, wrong signature");