| // 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 |
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| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef MOZC_STORAGE_LOUDS_BIT_VECTOR_BASED_ARRAY_BUILDER_H_ |
| #define MOZC_STORAGE_LOUDS_BIT_VECTOR_BASED_ARRAY_BUILDER_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/port.h" |
| |
| namespace mozc { |
| namespace storage { |
| namespace louds { |
| |
| class BitVectorBasedArrayBuilder { |
| public: |
| BitVectorBasedArrayBuilder(); |
| ~BitVectorBasedArrayBuilder(); |
| |
| // Adds the element to the builder. |
| // The length of the element would be ceiling by padding '\x00' bytes to the |
| // end. Please see also comments for SetSize below. |
| void Add(const string& element); |
| |
| // Sets size related parameters. The size of each element will be ceiling |
| // (when the image is built) as follows: |
| // - if the length of a element is less than or equal to base_length, |
| // the length in the image should be base_length. |
| // - otherwise, the length in the image should be |
| // "base_length + N * step_length", where N is a positive integer. |
| // For example, let base_length be '4' and step_length be '2'; |
| // - "" would be stored as "\x00\x00\x00\x00". |
| // - "a" would be stored as "a\x00\x00\x00" |
| // - "abcd" would be stored as "abcd" |
| // - "abcde" would be stored as "abcde\x00" |
| // Note that the '\0' terminator should *NOT* be stored in the image. |
| void SetSize(size_t base_length, size_t step_length); |
| |
| void Build(); |
| |
| const string &image() const; |
| private: |
| bool built_; |
| vector<string> elements_; |
| size_t base_length_; |
| size_t step_length_; |
| |
| string image_; |
| DISALLOW_COPY_AND_ASSIGN(BitVectorBasedArrayBuilder); |
| }; |
| |
| } // namespace louds |
| } // namespace storage |
| } // namespace mozc |
| |
| |
| #endif // MOZC_STORAGE_LOUDS_BIT_VECTOR_BASED_ARRAY_BUILDER_H_ |