Aegisub/aegisub/libaegisub/common/thesaurus.cpp

102 lines
3.1 KiB
C++

// Copyright (c) 2012, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// $Id$
/// @file thesaurus.cpp
/// @brief MyThes-compatible thesaurus implementation
/// @ingroup libaegisub thesaurus
#include "libaegisub/thesaurus.h"
#include "libaegisub/charset_conv.h"
#include "libaegisub/io.h"
#include "libaegisub/line_iterator.h"
#ifndef LAGI_PRE
#include <cstdlib>
#endif
template<class String, class Char, class Container>
static void split(String const& str, Char sep, Container *out) {
typename String::size_type pos, prev = 0;
out->reserve(2);
while ((pos = str.find(sep, prev)) != String::npos) {
if (pos > prev)
out->push_back(str.substr(prev, pos - prev));
prev = pos + 1;
}
if (prev < str.size())
out->push_back(str.substr(prev));
}
namespace agi {
Thesaurus::Thesaurus(std::string const& dat_path, std::string const& idx_path)
: dat(io::Open(dat_path))
{
scoped_ptr<std::ifstream> idx(io::Open(idx_path));
std::string encoding_name;
getline(*idx, encoding_name);
std::string unused_entry_count;
getline(*idx, unused_entry_count);
// Read the list of words and file offsets for those words
for (line_iterator<std::string> iter(*idx, encoding_name), end; iter != end; ++iter) {
std::vector<std::string> chunks;
split(*iter, '|', &chunks);
if (chunks.size() == 2) {
offsets[chunks[0]] = atoi(chunks[1].c_str());
}
}
conv.reset(new charset::IconvWrapper(encoding_name.c_str(), "utf-8"));
}
Thesaurus::~Thesaurus() { }
void Thesaurus::Lookup(std::string const& word, std::vector<Entry> *out) {
out->clear();
std::map<std::string, int>::const_iterator it = offsets.find(word);
if (!dat.get() || it == offsets.end()) return;
dat->seekg(it->second, std::ios::beg);
if (!dat->good()) return;
// First line is the word and meaning count
std::string temp;
getline(*dat, temp);
std::vector<std::string> header;
split(conv->Convert(temp), '|', &header);
if (header.size() != 2) return;
int meanings = atoi(header[1].c_str());
out->resize(meanings);
for (int i = 0; i < meanings; ++i) {
std::vector<std::string> line;
getline(*dat, temp);
split(conv->Convert(temp), '|', &line);
// The "definition" is just the part of speech plus the word it's
// giving synonyms for (which may not be the passed word)
(*out)[i].first = line[0] + ' ' + line[1];
(*out)[i].second.reserve(line.size() - 2);
copy(line.begin() + 2, line.end(), back_inserter((*out)[i].second));
}
}
}