1 /* 2 * Copyright (C) 2012 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 #ifndef ART_RUNTIME_INDENTER_H_ 18 #define ART_RUNTIME_INDENTER_H_ 19 20 #include "base/macros.h" 21 #include <streambuf> 22 23 const char kIndentChar =' '; 24 const size_t kIndentBy1Count = 2; 25 26 class Indenter : public std::streambuf { 27 public: Indenter(std::streambuf * out,char text,size_t count)28 Indenter(std::streambuf* out, char text, size_t count) 29 : indent_next_(true), out_sbuf_(out), text_(text), count_(count) {} 30 31 private: overflow(int_type c)32 int_type overflow(int_type c) { 33 if (c != std::char_traits<char>::eof()) { 34 if (indent_next_) { 35 for (size_t i = 0; i < count_; ++i) { 36 out_sbuf_->sputc(text_); 37 } 38 } 39 out_sbuf_->sputc(c); 40 indent_next_ = (c == '\n'); 41 } 42 return std::char_traits<char>::not_eof(c); 43 } 44 sync()45 int sync() { 46 return out_sbuf_->pubsync(); 47 } 48 49 bool indent_next_; 50 51 // Buffer to write output to. 52 std::streambuf* const out_sbuf_; 53 54 // Text output as indent. 55 const char text_; 56 57 // Number of times text is output. 58 const size_t count_; 59 60 DISALLOW_COPY_AND_ASSIGN(Indenter); 61 }; 62 63 #endif // ART_RUNTIME_INDENTER_H_ 64