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diff --git a/tesseract/src/classify/clusttool.h b/tesseract/src/classify/clusttool.h
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+/******************************************************************************
+ ** Filename: clusttool.h
+ ** Purpose:  Definition of clustering utility tools
+ ** Author:   Dan Johnson
+ **
+ ** (c) Copyright Hewlett-Packard Company, 1988.
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ ******************************************************************************/
+
+#ifndef TESSERACT_CLASSIFY_CLUSTTOOL_H_
+#define TESSERACT_CLASSIFY_CLUSTTOOL_H_
+
+#include "cluster.h"
+
+#include "serialis.h"
+
+#include <cstdio>
+
+namespace tesseract {
+
+uint16_t ReadSampleSize(tesseract::TFile *fp);
+
+PARAM_DESC *ReadParamDesc(tesseract::TFile *fp, uint16_t N);
+
+PROTOTYPE *ReadPrototype(tesseract::TFile *fp, uint16_t N);
+
+TESS_API
+void WriteParamDesc(FILE *File, uint16_t N, const PARAM_DESC ParamDesc[]);
+
+TESS_API
+void WritePrototype(FILE *File, uint16_t N, PROTOTYPE *Proto);
+
+} // namespace tesseract
+
+#endif  // TESSERACT_CLASSIFY_CLUSTTOOL_H_