text: /**
   * Copyright 2021 Huawei Technologies Co., Ltd
   *
   * 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.
   */
  
  #include "nnacl/infer/flatten_infer.h"
  #include "nnacl/infer/infer_register.h"
  
  int FlattenInferShape(const TensorC *const *inputs, size_t inputs_size, TensorC **outputs, size_t outputs_size,
                        OpParameter *parameter) {
  #ifdef Debug
    int check_ret = CheckAugmentNullSize(inputs, inputs_size, outputs, outputs_size, parameter, 1, 1);
    if (check_ret != NNACL_OK) {
      return check_ret;
    }
  #endif
  
    const TensorC *input = inputs[0];
    TensorC *output = outputs[0];
  
    SetDataTypeFormat(output, input);
    if (!parameter->infer_flag_) {
      return NNACL_INFER_INVALID;
    }
  
    int input_shape[MAX_SHAPE_SIZE];
    size_t input_shape_size = 0;
    ShapeSet(input_shape, &input_shape_size, input->shape_, input->shape_size_);
    int output_shape[2];
    output_shape[0] = input_shape[0];
    output_shape[1] = 1;
    for (size_t i = 1; i < input_shape_size; i++) {
      output_shape[1] *= input_shape[i];
    }
    SetShapeArray(output, output_shape, 2);
    return NNACL_OK;
  }
  
  REG_INFER(Flatten, PrimType_Flatten, FlattenInferShape)
  