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diff --git a/perfprofd/configreader.h b/perfprofd/configreader.h
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+++ b/perfprofd/configreader.h
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+/*
+ *
+ * Copyright 2015, The Android Open Source Project
+ *
+ * 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 SYSTEM_EXTRAS_PERFPROFD_CONFIGREADER_H_
+#define SYSTEM_EXTRAS_PERFPROFD_CONFIGREADER_H_
+
+#include <memory>
+#include <string>
+
+#include "config.h"
+
+namespace android {
+namespace perfprofd {
+class ProfilingConfig;  // Config proto.
+}  // namespace perfprofd
+}  // namespace android
+
+//
+// This table describes the perfprofd config file syntax in terms of
+// key/value pairs.  Values come in two flavors: strings, or unsigned
+// integers. In the latter case the reader sets allowable
+// minimum/maximum for the setting.
+//
+class ConfigReader {
+
+ public:
+  ConfigReader();
+  ~ConfigReader();
+
+  // Ask for the current setting of a config item
+  unsigned getUnsignedValue(const char *key) const;
+  bool getBoolValue(const char *key) const;
+  std::string getStringValue(const char *key) const;
+
+  // read the specified config file, applying any settings it contains
+  // returns true for successful read, false if conf file cannot be opened.
+  bool readFile();
+
+  bool Read(const std::string& data, bool fail_on_error, std::string* error_msg);
+
+  // set/get path to config file
+  static void setConfigFilePath(const char *path);
+  static const char *getConfigFilePath();
+
+  // override a config item (for unit testing purposes)
+  void overrideUnsignedEntry(const char *key, unsigned new_value);
+
+  void FillConfig(Config* config);
+  static std::string ConfigToString(const Config& config);
+
+  static void ProtoToConfig(const android::perfprofd::ProfilingConfig& in, Config* out);
+
+ private:
+  void addUnsignedEntry(const char *key,
+                        unsigned default_value,
+                        unsigned min_value,
+                        unsigned max_value);
+  void addStringEntry(const char *key, const char *default_value);
+  void addDefaultEntries();
+  bool parseLine(const std::string& key,
+                 const std::string& value,
+                 unsigned linecount,
+                 std::string* error_msg);
+
+  struct Data;
+  std::unique_ptr<Data> data_;
+};
+
+#endif