1 /* 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef API_RTC_EVENT_LOG_OUTPUT_FILE_H_ 12 #define API_RTC_EVENT_LOG_OUTPUT_FILE_H_ 13 14 #include <stddef.h> 15 #include <stdio.h> 16 17 #include <string> 18 19 #include "api/rtc_event_log_output.h" 20 #include "rtc_base/system/file_wrapper.h" 21 22 namespace webrtc { 23 24 class RtcEventLogOutputFile final : public RtcEventLogOutput { 25 public: 26 static const size_t kMaxReasonableFileSize; // Explanation at declaration. 27 28 // Unlimited/limited-size output file (by filename). 29 explicit RtcEventLogOutputFile(const std::string& file_name); 30 RtcEventLogOutputFile(const std::string& file_name, size_t max_size_bytes); 31 32 // Limited-size output file (by FILE*). This class takes ownership 33 // of the FILE*, and closes it on destruction. 34 RtcEventLogOutputFile(FILE* file, size_t max_size_bytes); 35 36 ~RtcEventLogOutputFile() override = default; 37 38 bool IsActive() const override; 39 40 bool Write(const std::string& output) override; 41 42 private: 43 RtcEventLogOutputFile(FileWrapper file, size_t max_size_bytes); 44 45 // IsActive() can be called either from outside or from inside, but we don't 46 // want to incur the overhead of a virtual function call if called from inside 47 // some other function of this class. 48 inline bool IsActiveInternal() const; 49 50 // Maximum size, or zero for no limit. 51 const size_t max_size_bytes_; 52 size_t written_bytes_{0}; 53 FileWrapper file_; 54 }; 55 56 } // namespace webrtc 57 58 #endif // API_RTC_EVENT_LOG_OUTPUT_FILE_H_ 59