1 // 2 // 3 // Copyright 2023 gRPC authors. 4 // 5 // Licensed under the Apache License, Version 2.0 (the "License"); 6 // you may not use this file except in compliance with the License. 7 // You may obtain a copy of the License at 8 // 9 // http://www.apache.org/licenses/LICENSE-2.0 10 // 11 // Unless required by applicable law or agreed to in writing, software 12 // distributed under the License is distributed on an "AS IS" BASIS, 13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 // See the License for the specific language governing permissions and 15 // limitations under the License. 16 // 17 // 18 19 #ifndef GRPC_SRC_CORE_LIB_GPRPP_DIRECTORY_READER_H 20 #define GRPC_SRC_CORE_LIB_GPRPP_DIRECTORY_READER_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include <memory> 25 26 #include "absl/functional/function_ref.h" 27 #include "absl/status/status.h" 28 #include "absl/strings/string_view.h" 29 30 namespace grpc_core { 31 32 class DirectoryReader { 33 public: 34 virtual ~DirectoryReader() = default; 35 // Returns the name of the directory being read. 36 virtual absl::string_view Name() const = 0; 37 // Calls callback for each name in the directory except for "." and "..". 38 // Returns non-OK if there was an error reading the directory. 39 virtual absl::Status ForEach( 40 absl::FunctionRef<void(absl::string_view)> callback) = 0; 41 }; 42 43 std::unique_ptr<DirectoryReader> MakeDirectoryReader( 44 absl::string_view filename); 45 46 } // namespace grpc_core 47 48 #endif // GRPC_SRC_CORE_LIB_GPRPP_DIRECTORY_READER_H