From 5c86147ef4e2e0f5d622941c34764f2b5a9a439c Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Tue, 20 Apr 2021 12:57:45 -0400
Subject: [PATCH] log/backend: Use in-class initializer for FileBackend

We can also avoid redundant constructions of the same string repeatedly.
---
 src/common/logging/backend.cpp | 10 ++++++----
 src/common/logging/backend.h   |  2 +-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/common/logging/backend.cpp b/src/common/logging/backend.cpp
index f47e2368f..cdfa0964a 100644
--- a/src/common/logging/backend.cpp
+++ b/src/common/logging/backend.cpp
@@ -145,12 +145,14 @@ void LogcatBackend::Write(const Entry& entry) {
     PrintMessageToLogcat(entry);
 }
 
-FileBackend::FileBackend(const std::string& filename) : bytes_written(0) {
-    if (FileUtil::Exists(filename + ".old.txt")) {
-        FileUtil::Delete(filename + ".old.txt");
+FileBackend::FileBackend(const std::string& filename) {
+    const auto old_filename = filename + ".old.txt";
+
+    if (FileUtil::Exists(old_filename)) {
+        FileUtil::Delete(old_filename);
     }
     if (FileUtil::Exists(filename)) {
-        FileUtil::Rename(filename, filename + ".old.txt");
+        FileUtil::Rename(filename, old_filename);
     }
 
     // _SH_DENYWR allows read only access to the file for other programs.
diff --git a/src/common/logging/backend.h b/src/common/logging/backend.h
index eeb360aa4..b9e5386a0 100644
--- a/src/common/logging/backend.h
+++ b/src/common/logging/backend.h
@@ -109,7 +109,7 @@ public:
 
 private:
     FileUtil::IOFile file;
-    std::size_t bytes_written;
+    std::size_t bytes_written = 0;
 };
 
 /**