Add split functions

fastdeploy/function/split.h

@@ -0,0 +1,36 @@
+// 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.
+
+#pragma once
+
+#include "fastdeploy/core/fd_tensor.h"
+
+namespace fastdeploy {
+namespace function {
+
+/** Split the input tensor into multiple sub-Tensors.
+    @param x The input tensor.
+    @param num_or_sections f num_or_sections is an int, then num_or_sections
+           indicates the number of equal sized sub-Tensors that the x will
+           be divided into.
+    @param out The output vector tensor which stores the result.
+    @param axis Axis which will be splitted.
+*/
+
+FASTDEPLOY_DECL void Split(const FDTensor& x,
+                           const std::vector<int>& num_or_sections,
+                           std::vector<FDTensor>* out, int axis = 0);
+
+}  // namespace function
+}  // namespace fastdeploy