| // Copyright 2010-2014, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * 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. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "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 COPYRIGHT |
| // OWNER OR CONTRIBUTORS 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 MOZC_DATA_MANAGER_CONNECTION_FILE_READER_H_ |
| #define MOZC_DATA_MANAGER_CONNECTION_FILE_READER_H_ |
| |
| #include <string> |
| |
| #include "base/file_stream.h" |
| #include "base/port.h" |
| |
| namespace mozc { |
| |
| // Utility class to read connection_single_column.txt. |
| // Usage: |
| // for (ConnectionFileReader reader(filename); !reader.done(); reader.Next()) { |
| // int rid = reader.rid_of_left_node(); |
| // ... |
| // } |
| class ConnectionFileReader { |
| public: |
| explicit ConnectionFileReader(const string &filename); |
| ~ConnectionFileReader(); |
| |
| bool done() const { return done_; } |
| // Currently the matrix is square. |
| size_t left_size() const { return pos_size_; } |
| size_t right_size() const { return pos_size_; } |
| int32 rid_of_left_node() const { return array_index_ / pos_size_; } |
| int32 lid_of_right_node() const { return array_index_ % pos_size_; } |
| int32 cost() const { return cost_; } |
| |
| void Next(); |
| |
| private: |
| InputFileStream stream_; |
| bool done_; |
| size_t pos_size_; |
| int32 array_index_; |
| int32 cost_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ConnectionFileReader); |
| }; |
| |
| } // namespace mozc |
| |
| #endif // MOZC_DATA_MANAGER_CONNECTION_FILE_READER_H_ |