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diff --git a/src/include/fst/script/text-io.h b/src/include/fst/script/text-io.h
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+// text-io.h
+
+// 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.
+//
+// Copyright 2005-2010 Google, Inc.
+// Author: riley@google.com (Michael Riley)
+// Modified: jpr@google.com (Jake Ratkiewicz) to work with generic WeightClass
+//
+// \file
+// Utilities for reading and writing textual strings representing
+// states, labels, and weights and files specifying label-label pairs
+// and potentials (state-weight pairs).
+//
+
+#ifndef FST_SCRIPT_TEXT_IO_H__
+#define FST_SCRIPT_TEXT_IO_H__
+
+#include <string>
+#include <vector>
+using std::vector;
+
+
+#include <iostream>
+#include <fstream>
+#include <fst/script/weight-class.h>
+
+namespace fst {
+namespace script {
+
+bool ReadPotentials(const string &weight_type,
+                    const string& filename,
+                    vector<WeightClass>* potential);
+
+bool WritePotentials(const string& filename,
+                     const vector<WeightClass>& potential);
+
+}  // namespace script
+}  // namespace fst
+
+#endif  // FST_SCRIPT_TEXT_IO_H__