Update to 2.0.0 tree from current Fremantle build

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

diff --git a/3rdparty/flann/util/saving.h b/3rdparty/flann/util/saving.h
new file mode 100644 (file)
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+++ b/3rdparty/flann/util/saving.h
@@ -0,0 +1,87 @@
+/***********************************************************************
+ * 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 flann
+{
+
+/**
+ * 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_ */