Update to 2.0.0 tree from current Fremantle build

[opencv] / 3rdparty / flann / util / saving.cpp

diff --git a/3rdparty/flann/util/saving.cpp b/3rdparty/flann/util/saving.cpp
new file mode 100644 (file)
index 0000000..ea85327
--- /dev/null
+++ b/3rdparty/flann/util/saving.cpp
@@ -0,0 +1,73 @@
+/***********************************************************************
+ * 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.
+ *************************************************************************/
+
+#include "common.h"
+#include "saving.h"
+#include "nn_index.h"
+#include <cstdio>
+
+namespace flann
+{
+
+const char FLANN_SIGNATURE[] = "FLANN_INDEX";
+
+void save_header(FILE* stream, const NNIndex& index)
+{
+       IndexHeader header;
+       memset(header.signature, 0 , sizeof(header.signature));
+       strcpy(header.signature, FLANN_SIGNATURE);
+       header.flann_version = (int)FLANN_VERSION;
+       header.index_type = index.getType();
+       header.rows = index.size();
+       header.cols = index.veclen();
+
+       std::fwrite(&header, sizeof(header),1,stream);
+}
+
+
+
+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;
+
+}
+
+}