// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
//
// 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 "paddle/fluid/framework/operator.h"
#include "paddle/fluid/lite/core/op_lite.h"
#include "paddle/fluid/lite/core/op_registry.h"

namespace paddle {
namespace lite {
namespace operators {

class FillConstantOp : public OpLite {
 public:
  explicit FillConstantOp(const std::string& type) : OpLite(type) {}

  bool CheckShape() const override {
    CHECK_OR_FALSE(param_.Out);
    return true;
  }

  bool InferShape() const override {
    param_.Out->Resize(param_.shape);
    return true;
  }

  bool AttachImpl(const OpDesc& opdesc, lite::Scope* scope) override {
    CHECK_EQ(opdesc.Inputs().size(), 2UL);
    auto Out_name = opdesc.Output("Out").front();

    param_.Out = GetMutableVar<Tensor>(scope, Out_name);
    param_.dtype = boost::get<int>(opdesc.GetAttr("dtype"));
    param_.shape = boost::get<std::vector<int64_t>>(opdesc.GetAttr("shape"));
    param_.value = boost::get<float>(opdesc.GetAttr("value"));
    param_.force_cpu = boost::get<bool>(opdesc.GetAttr("force_cpu"));
    return true;
  }

  void AttachKernel(KernelBase* kernel) override { kernel->SetParam(param_); }

  std::string DebugString() const override { return "fill_constant"; }

 private:
  mutable operators::FillConstantParam param_;
};

}  // namespace operators
}  // namespace lite
}  // namespace paddle

REGISTER_LITE_OP(fill_constant, paddle::lite::operators::FillConstantOp);