[Functions] Add quantile function (#700)

* Add sort function

* Add isfinite function

* upgrade isinf isnan

* Add Scalar to FDTensor

* Add floor, ceil function

* add cast functions

* Update out_tmp

* Update quantile

* add gather scatter along axis

* finish quantile function

* Add quantile unittest

* refresh code style for test source code

* Add comments

* Add full function

* Add scalar to fd tensor

* Add full unittest

* Add functions headers

* move fdtensor operators to fastdeploy namespace

fastdeploy/function/cast.cc

@@ -0,0 +1,46 @@
+// Copyright (c) 2022 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 "fastdeploy/function/cast.h"
+#include <algorithm>
+
+namespace fastdeploy {
+namespace function {
+
+template <typename InT, typename OutT> struct CastOpTransformFunctor {
+  OutT operator()(InT in) const { return static_cast<OutT>(in); }
+};
+
+template <typename InT>
+void CastKernel(const FDTensor& x, FDTensor* out, FDDataType output_dtype) {
+
+  FD_VISIT_ALL_TYPES(output_dtype, "CastOpTransformFunctor", ([&] {
+                       auto* in_begin = reinterpret_cast<const InT*>(x.Data());
+                       auto* in_end = in_begin + x.Numel();
+                       FDTensor out_tmp;
+                       out_tmp.Allocate(x.Shape(), output_dtype);
+                       auto* out_begin = reinterpret_cast<data_t*>(out_tmp.Data());
+                       std::transform(in_begin, in_end, out_begin,
+                                      CastOpTransformFunctor<InT, data_t>());
+                       *out = std::move(out_tmp);
+                     }));
+}
+
+void Cast(const FDTensor& x, FDTensor* out, FDDataType output_dtype) {
+  FD_VISIT_ALL_TYPES(x.dtype, "CastKernel",
+                     ([&] { CastKernel<data_t>(x, out, output_dtype); }));
+}
+
+}  // namespace function
+}  // namespace fastdeploy