You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.2 KiB
64 lines
2.2 KiB
/*
|
|
* Copyright (C) 2018 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef LIBTEXTCLASSIFIER_UTILS_WORDPIECE_TOKENIZER_H_
|
|
#define LIBTEXTCLASSIFIER_UTILS_WORDPIECE_TOKENIZER_H_
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "absl/strings/string_view.h"
|
|
|
|
namespace libtextclassifier3 {
|
|
|
|
struct LookupStatus {
|
|
LookupStatus() : error_msg(""), success(true) {}
|
|
explicit LookupStatus(const std::string& msg)
|
|
: error_msg(msg), success(false) {}
|
|
std::string error_msg;
|
|
bool success;
|
|
|
|
static LookupStatus OK() { return LookupStatus(); }
|
|
};
|
|
|
|
class WordpieceVocab {
|
|
public:
|
|
virtual ~WordpieceVocab() {}
|
|
virtual LookupStatus Contains(const absl::string_view key,
|
|
bool* value) const = 0;
|
|
};
|
|
|
|
LookupStatus WordpieceTokenize(
|
|
const absl::string_view token, const int max_bytes_per_token,
|
|
const int max_chars_per_subtoken, const std::string& suffix_indicator,
|
|
bool use_unknown_token, const std::string& unknown_token,
|
|
bool split_unknown_characters, const WordpieceVocab* vocab_map,
|
|
std::vector<std::string>* subwords, std::vector<int>* begin_offset,
|
|
std::vector<int>* end_offset, int* num_word_pieces);
|
|
|
|
// As above but with `max_bytes_per_subtoken` unknown,
|
|
// and split_unknown_characters=false. (For backwards compatibility.)
|
|
LookupStatus WordpieceTokenize(
|
|
const absl::string_view token, const int max_bytes_per_token,
|
|
const std::string& suffix_indicator, bool use_unknown_token,
|
|
const std::string& unknown_token, const WordpieceVocab* vocab_map,
|
|
std::vector<std::string>* subwords, std::vector<int>* begin_offset,
|
|
std::vector<int>* end_offset, int* num_word_pieces);
|
|
|
|
} // namespace libtextclassifier3
|
|
|
|
#endif // LIBTEXTCLASSIFIER_UTILS_WORDPIECE_TOKENIZER_H_
|