Add rotating log file stream.

webrtc/base/logsinks.cc

Index: webrtc/base/logsinks.cc
diff --git a/webrtc/base/logsinks.cc b/webrtc/base/logsinks.cc
new file mode 100644
index 0000000000000000000000000000000000000000..470e540b0ffa766fc3bc424312685cd5be34ee4b
--- /dev/null
+++ b/webrtc/base/logsinks.cc
@@ -0,0 +1,54 @@
+/*
+ *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/logsinks.h"
+
+#include <string>
+
+namespace rtc {
+FileRotatingLogSink::FileRotatingLogSink(const std::string& log_dir_path,
+                                         const std::string& log_prefix,
+                                         size_t max_log_size,
+                                         size_t num_log_files)
+    : FileRotatingLogSink(new FileRotatingStream(log_dir_path,
+                                                 log_prefix,
+                                                 max_log_size,
+                                                 num_log_files)) {
+}
+
+FileRotatingLogSink::FileRotatingLogSink(FileRotatingStream* stream)
+    : stream_(stream) {
+}
+
+FileRotatingLogSink::~FileRotatingLogSink() {
+}
+
+void FileRotatingLogSink::OnLogMessage(const std::string& message) {
+  if (!stream_ || stream_->GetState() != SS_OPEN) {
+    LOG(LS_WARNING) << "Init() must be called before adding this sink.";
+    return;
+  }
+  stream_->WriteAll(message.c_str(), message.size(), nullptr, nullptr);
+}
+
+bool FileRotatingLogSink::Init() {
+  return stream_->Open();
+}
+
+MobileDeviceLogSink::MobileDeviceLogSink(const std::string& log_dir_path,
+                                         size_t max_total_log_size)
+    : FileRotatingLogSink(
+          new MobileDeviceLogStream(log_dir_path, max_total_log_size)) {
+}
+
+MobileDeviceLogSink::~MobileDeviceLogSink() {
+}
+
+}  // namespace rtc