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diff --git a/geocoding/mapping_file_provider.h b/geocoding/mapping_file_provider.h
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+// Copyright (C) 2012 The Libphonenumber Authors
+//
+// 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.
+
+// Author: Patrick Mezard
+
+#ifndef I18N_PHONENUMBERS_GEOCODING_MAPPING_FILE_PROVIDER_H_
+#define I18N_PHONENUMBERS_GEOCODING_MAPPING_FILE_PROVIDER_H_
+
+#include <string>
+
+#include "phonenumbers/base/basictypes.h"
+
+namespace i18n {
+namespace phonenumbers {
+
+using std::string;
+
+struct CountryLanguages;
+
+// A utility which knows the data files that are available for the geocoder to
+// use. The data files contain mappings from phone number prefixes to text
+// descriptions, and are organized by country calling code and language that the
+// text descriptions are in.
+class MappingFileProvider {
+ public:
+  typedef const CountryLanguages* (*country_languages_getter)(int index);
+
+  // Initializes a MappingFileProvider with country_calling_codes, a sorted
+  // list of country_calling_code_size calling codes, and a function
+  // get_country_languages(int index) returning the CountryLanguage information
+  // related to the country code at index in country_calling_codes.
+  MappingFileProvider(const int* country_calling_codes,
+                      int country_calling_code_size,
+                      country_languages_getter get_country_languages);
+
+  // Returns the name of the file that contains the mapping data for the
+  // country_calling_code in the language specified, or an empty string if no
+  // such file can be found. language is a two-letter lowercase ISO language
+  // codes as defined by ISO 639-1. script is a four-letter titlecase (the first
+  // letter is uppercase and the rest of the letters are lowercase) ISO script
+  // codes as defined in ISO 15924. region is a two-letter uppercase ISO country
+  // codes as defined by ISO 3166-1.
+  const string& GetFileName(int country_calling_code, const string& language,
+                            const string& script, const string& region, string*
+                            filename) const;
+
+ private:
+  void FindBestMatchingLanguageCode(const CountryLanguages* languages,
+                                    const string& language,
+                                    const string& script,
+                                    const string& region,
+                                    string* best_match) const;
+
+  const int* const country_calling_codes_;
+  const int country_calling_codes_size_;
+  const country_languages_getter get_country_languages_;
+
+  DISALLOW_COPY_AND_ASSIGN(MappingFileProvider);
+};
+
+}  // namespace phonenumbers
+}  // namespace i18n
+
+#endif  // I18N_PHONENUMBERS_GEOCODING_MAPPING_FILE_PROVIDER_H_