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#ifndef MOZC_DICTIONARY_SYSTEM_CODEC_H_
#define MOZC_DICTIONARY_SYSTEM_CODEC_H_
#include "dictionary/system/codec_interface.h"
#include <string>
#include <vector>
#include "base/base.h"
#include "dictionary/system/words_info.h"
namespace mozc {
namespace dictionary {
class SystemDictionaryCodec : public SystemDictionaryCodecInterface {
public:
SystemDictionaryCodec();
virtual ~SystemDictionaryCodec();
// Return section name for key trie
const string GetSectionNameForKey() const;
// Return section name for value trie
const string GetSectionNameForValue() const;
// Return section name for tokens array
const string GetSectionNameForTokens() const;
// Return section name for frequent pos map
const string GetSectionNameForPos() const;
// Compresses key string into small bytes.
void EncodeKey(const string &src, string *dst) const;
// Decompress key string
void DecodeKey(const string &src, string *dst) const;
// Compresses value string into small bytes.
void EncodeValue(const string &src, string *dst) const;
// Decompress value string
void DecodeValue(const string &src, string *dst) const;
// Compress tokens
void EncodeTokens(
const vector<TokenInfo> &tokens, string *output) const;
// Decompress tokens
void DecodeTokens(const uint8 *ptr, vector<TokenInfo> *tokens) const;
// Read a token for reverse lookup
// If the token have value id, assign it to |id_in_value_trie|
// otherwise assign -1
// Return false if a token is the last token for a certain key
bool ReadTokenForReverseLookup(
const uint8 *ptr, int *value_id, int *read_bytes) const;
uint8 GetTokensTerminationFlag() const;
private:
void EncodeToken(
const vector<TokenInfo> &tokens, int index, ostringstream *oss) const;
bool DecodeToken(
const uint8 *ptr, TokenInfo *token_info, int *read_bytes) const;
DISALLOW_COPY_AND_ASSIGN(SystemDictionaryCodec);
};
} // namespace dictionary
} // namespace mozc
#endif // MOZC_DICTIONARY_SYSTEM_CODEC_H_