1 // Licensed to the Apache Software Foundation (ASF) under one 2 // or more contributor license agreements. See the NOTICE file 3 // distributed with this work for additional information 4 // regarding copyright ownership. The ASF licenses this file 5 // to you under the Apache License, Version 2.0 (the 6 // "License"); you may not use this file except in compliance 7 // with the License. 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, 12 // software distributed under the License is distributed on an 13 // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 14 // KIND, either express or implied. See the License for the 15 // specific language governing permissions and limitations 16 // under the License. 17 18 #pragma once 19 20 #include <cstdint> 21 22 #include "arrow/io/interfaces.h" 23 #include "arrow/util/visibility.h" 24 25 namespace arrow { 26 namespace io { 27 28 // Output stream that just writes to stdout. 29 class ARROW_EXPORT StdoutStream : public OutputStream { 30 public: 31 StdoutStream(); ~StdoutStream()32 ~StdoutStream() override {} 33 34 Status Close() override; 35 bool closed() const override; 36 37 Result<int64_t> Tell() const override; 38 39 Status Write(const void* data, int64_t nbytes) override; 40 41 private: 42 int64_t pos_; 43 }; 44 45 // Output stream that just writes to stderr. 46 class ARROW_EXPORT StderrStream : public OutputStream { 47 public: 48 StderrStream(); ~StderrStream()49 ~StderrStream() override {} 50 51 Status Close() override; 52 bool closed() const override; 53 54 Result<int64_t> Tell() const override; 55 56 Status Write(const void* data, int64_t nbytes) override; 57 58 private: 59 int64_t pos_; 60 }; 61 62 // Input stream that just reads from stdin. 63 class ARROW_EXPORT StdinStream : public InputStream { 64 public: 65 StdinStream(); ~StdinStream()66 ~StdinStream() override {} 67 68 Status Close() override; 69 bool closed() const override; 70 71 Result<int64_t> Tell() const override; 72 73 Result<int64_t> Read(int64_t nbytes, void* out) override; 74 75 Result<std::shared_ptr<Buffer>> Read(int64_t nbytes) override; 76 77 private: 78 int64_t pos_; 79 }; 80 81 } // namespace io 82 } // namespace arrow 83