mirror of https://github.com/odrling/Aegisub
110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
// Copyright (c) 2012, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/// @file thesaurus.cpp
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/// @brief MyThes-compatible thesaurus implementation
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/// @ingroup libaegisub thesaurus
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#include "libaegisub/thesaurus.h"
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#include "libaegisub/charset_conv.h"
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#include "libaegisub/file_mapping.h"
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#include "libaegisub/line_iterator.h"
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#include "libaegisub/make_unique.h"
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#include "libaegisub/split.h"
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#include <boost/interprocess/streams/bufferstream.hpp>
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namespace agi {
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Thesaurus::Thesaurus(agi::fs::path const& dat_path, agi::fs::path const& idx_path)
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: dat(make_unique<read_file_mapping>(dat_path))
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{
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read_file_mapping idx_file(idx_path);
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boost::interprocess::ibufferstream idx(idx_file.read(), static_cast<size_t>(idx_file.size()));
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std::string encoding_name;
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getline(idx, encoding_name);
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std::string unused_entry_count;
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getline(idx, unused_entry_count);
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conv = make_unique<charset::IconvWrapper>(encoding_name.c_str(), "utf-8");
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// Read the list of words and file offsets for those words
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for (auto const& line : line_iterator<std::string>(idx, encoding_name)) {
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auto pos = line.find('|');
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if (pos != line.npos && line.find('|', pos + 1) == line.npos)
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offsets[line.substr(0, pos)] = static_cast<size_t>(atoi(line.c_str() + pos + 1));
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}
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}
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Thesaurus::~Thesaurus() { }
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std::vector<Thesaurus::Entry> Thesaurus::Lookup(std::string const& word) {
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std::vector<Entry> out;
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if (!dat) return out;
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auto it = offsets.find(word);
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if (it == offsets.end()) return out;
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if (it->second >= dat->size()) return out;
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auto len = dat->size() - it->second;
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auto buff = dat->read(it->second, len);
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auto buff_end = buff + len;
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std::string temp;
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auto read_line = [&] (std::string& temp) -> std::string * {
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auto start = buff;
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auto end = std::find(buff, buff_end, '\n');
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buff = end < buff_end ? end + 1 : buff_end;
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if (end > start && end[-1] == '\r') --end;
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temp.clear();
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conv->Convert(start, end - start, temp);
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return &temp;
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};
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// First line is the word and meaning count
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std::vector<std::string> header;
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agi::Split(header, *read_line(temp), '|');
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if (header.size() != 2) return out;
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int meanings = atoi(header[1].c_str());
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out.reserve(meanings);
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std::vector<std::string> line;
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for (int i = 0; i < meanings; ++i) {
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agi::Split(line, *read_line(temp), '|');
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if (line.size() < 2)
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continue;
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Entry e;
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// The "definition" is just the part of speech (which may be empty)
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// plus the word it's giving synonyms for (which may not be the passed word)
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if (!line[0].empty())
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e.first = line[0] + ' ';
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e.first += line[1];
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e.second.reserve(line.size() - 2);
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for (size_t i = 2; i < line.size(); ++i) {
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if (line[i].size())
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e.second.emplace_back(std::move(line[i]));
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}
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out.emplace_back(std::move(e));
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}
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return out;
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}
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}
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