1 /* 2 * Copyright (C) 2015, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <memory> 20 #include <ostream> 21 #include <string> 22 23 #include <stdio.h> 24 25 namespace android { 26 namespace aidl { 27 28 class CodeWriter; 29 using CodeWriterPtr = std::unique_ptr<CodeWriter>; 30 31 class CodeWriter { 32 public: 33 // Get a CodeWriter that writes to a file. When filename is "-", 34 // it is written to stdout. 35 static CodeWriterPtr ForFile(const std::string& filename); 36 // Get a CodeWriter that writes to a string buffer. 37 // The buffer gets updated only after Close() is called or the CodeWriter 38 // is deleted -- much like a real file. 39 static CodeWriterPtr ForString(std::string* buf); 40 // Write a formatted string to this writer in the usual printf sense. 41 // Returns false on error. 42 virtual bool Write(const char* format, ...) __attribute__((format(printf, 2, 3))); 43 void Indent(); 44 void Dedent(); 45 virtual bool Close(); 46 virtual ~CodeWriter() = default; 47 CodeWriter() = default; 48 49 CodeWriter& operator<<(const char* s); 50 CodeWriter& operator<<(const std::string& str); 51 52 private: 53 CodeWriter(std::unique_ptr<std::ostream> ostream); 54 std::string ApplyIndent(const std::string& str); 55 const std::unique_ptr<std::ostream> ostream_; 56 int indent_level_ {0}; 57 bool start_of_line_ {true}; 58 }; 59 60 } // namespace aidl 61 } // namespace android 62