133 lines
4.4 KiB
C++
133 lines
4.4 KiB
C++
// Copyright (c) 2014, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/*!
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* \file language_base.h
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*
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* \brief Language Base class for Polymorphism.
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*/
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#ifndef LANGUAGE_BASE_H
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#define LANGUAGE_BASE_H
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#include <vector>
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#include <unordered_map>
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#include <string>
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/*!
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* \namespace Language
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* \brief Mnemonic language related namespace.
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*/
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namespace Language
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{
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/*!
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* \class Base
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* \brief A base language class which all languages have to inherit from for
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* Polymorphism.
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*/
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class Base
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{
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protected:
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std::vector<std::string> *word_list; /*!< A pointer to the array of words */
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std::unordered_map<std::string, uint32_t> *word_map; /*!< hash table to find word's index */
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std::unordered_map<std::string, uint32_t> *trimmed_word_map; /*!< hash table to find word's trimmed index */
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std::string language_name; /*!< Name of language */
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uint32_t unique_prefix_length; /*!< Number of unique starting characters to trim the wordlist to when matching */
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/*!
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* \brief Populates the word maps after the list is ready.
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*/
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void populate_maps()
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{
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int ii;
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std::vector<std::string>::iterator it;
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for (it = word_list->begin(), ii = 0; it != word_list->end(); it++, ii++)
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{
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(*word_map)[*it] = ii;
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if (it->length() > unique_prefix_length)
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{
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(*trimmed_word_map)[it->substr(0, unique_prefix_length)] = ii;
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}
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else
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{
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(*trimmed_word_map)[*it] = ii;
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}
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}
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}
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public:
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Base()
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{
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word_list = new std::vector<std::string>;
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word_map = new std::unordered_map<std::string, uint32_t>;
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trimmed_word_map = new std::unordered_map<std::string, uint32_t>;
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unique_prefix_length = 4;
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}
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/*!
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* \brief Returns a pointer to the word list.
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* \return A pointer to the word list.
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*/
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const std::vector<std::string>& get_word_list() const
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{
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return *word_list;
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}
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/*!
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* \brief Returns a pointer to the word map.
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* \return A pointer to the word map.
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*/
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const std::unordered_map<std::string, uint32_t>& get_word_map() const
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{
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return *word_map;
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}
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/*!
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* \brief Returns a pointer to the trimmed word map.
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* \return A pointer to the trimmed word map.
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*/
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const std::unordered_map<std::string, uint32_t>& get_trimmed_word_map() const
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{
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return *trimmed_word_map;
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}
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/*!
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* \brief Returns the name of the language.
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* \return Name of the language.
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*/
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std::string get_language_name() const
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{
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return language_name;
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}
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/*!
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* \brief Returns the number of unique starting characters to be used for matching.
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* \return Number of unique starting characters.
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*/
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uint32_t get_unique_prefix_length() const
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{
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return unique_prefix_length;
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}
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};
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}
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#endif
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