/* Copyright 2023 The MediaPipe Authors.

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 MEDIAPIPE_TASKS_CC_TEXT_CUSTOM_OPS_SENTENCEPIECE_OPTIMIZED_ENCODER_H_
#define MEDIAPIPE_TASKS_CC_TEXT_CUSTOM_OPS_SENTENCEPIECE_OPTIMIZED_ENCODER_H_

// Sentencepiece encoder optimized with memmapped model.

#include <string>
#include <tuple>
#include <vector>

#include "mediapipe/tasks/cc/text/custom_ops/sentencepiece/encoder_config_generated.h"

namespace mediapipe::tflite_operations::sentencepiece {

enum class EncoderResultType { SUCCESS = 0, WRONG_CONFIG = 1 };

struct EncoderResult {
  EncoderResultType type = EncoderResultType::SUCCESS;
  std::vector<int> codes;
  std::vector<int> offsets;
};
std::tuple<std::string, std::vector<int>> NormalizeString(
    const std::string& in_string, const EncoderConfig& config);

// Encodes one string and returns ids and offsets. Takes the configuration as a
// type-erased buffer.
EncoderResult EncodeString(const std::string& string, const void* config_buffer,
                           bool add_bos, bool add_eos, bool reverse);

}  // namespace mediapipe::tflite_operations::sentencepiece

#endif  // MEDIAPIPE_TASKS_CC_TEXT_CUSTOM_OPS_SENTENCEPIECE_OPTIMIZED_ENCODER_H_
