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#ifndef DICT_H_
#define DICT_H_
#include <cassert>
#include <cstring>
#include <tr1/unordered_map>
#include <string>
#include <vector>
#include <boost/functional/hash.hpp>
#include "wordid.h"
class Dict {
typedef std::tr1::unordered_map<std::string, WordID, boost::hash<std::string> > Map;
public:
Dict() : b0_("<bad0>") { words_.reserve(1000); }
inline int max() const { return words_.size(); }
inline WordID Convert(const std::string& word, bool frozen = false) {
Map::iterator i = d_.find(word);
if (i == d_.end()) {
if (frozen)
return 0;
words_.push_back(word);
d_[word] = words_.size();
return words_.size();
} else {
return i->second;
}
}
inline WordID Convert(const std::vector<std::string>& words, bool frozen = false) {
std::string word= "";
for (std::vector<std::string>::const_iterator it=words.begin();
it != words.end(); ++it) {
if (it != words.begin()) word += "__";
word += *it;
}
return Convert(word, frozen);
}
inline const std::string& Convert(const WordID& id) const {
if (id == 0) return b0_;
assert(id <= words_.size());
return words_[id-1];
}
void clear() { words_.clear(); d_.clear(); }
private:
const std::string b0_;
std::vector<std::string> words_;
Map d_;
};
#endif
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