From 0be736c7fc6bed0733095ca2a951eb86ef1683dc Mon Sep 17 00:00:00 2001
From: Sam Brkopac <brkopac@gmail.com>
Date: Mon, 22 Aug 2016 13:31:43 -0700
Subject: [PATCH] Added the ability to truncate the basic file logger.

Added the ability to truncate the basic file logger.
---
 include/spdlog/details/spdlog_impl.h | 8 ++++----
 include/spdlog/sinks/file_sinks.h    | 5 +++--
 include/spdlog/spdlog.h              | 4 ++--
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/include/spdlog/details/spdlog_impl.h b/include/spdlog/details/spdlog_impl.h
index 4ef085b6..fb4e6f84 100644
--- a/include/spdlog/details/spdlog_impl.h
+++ b/include/spdlog/details/spdlog_impl.h
@@ -36,14 +36,14 @@ inline void spdlog::drop(const std::string &name)
 }
 
 // Create multi/single threaded simple file logger
-inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_mt(const std::string& logger_name, const filename_t& filename, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_mt(const std::string& logger_name, const filename_t& filename, bool force_flush, bool truncate)
 {
-    return create<spdlog::sinks::simple_file_sink_mt>(logger_name, filename, force_flush);
+    return create<spdlog::sinks::simple_file_sink_mt>(logger_name, filename, force_flush, truncate);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_st(const std::string& logger_name, const filename_t& filename, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_st(const std::string& logger_name, const filename_t& filename, bool force_flush, bool truncate)
 {
-    return create<spdlog::sinks::simple_file_sink_st>(logger_name, filename, force_flush);
+    return create<spdlog::sinks::simple_file_sink_st>(logger_name, filename, force_flush, truncate);
 }
 
 // Create multi/single threaded rotating file logger
diff --git a/include/spdlog/sinks/file_sinks.h b/include/spdlog/sinks/file_sinks.h
index a687f99f..ff767593 100644
--- a/include/spdlog/sinks/file_sinks.h
+++ b/include/spdlog/sinks/file_sinks.h
@@ -30,10 +30,11 @@ class simple_file_sink : public base_sink < Mutex >
 {
 public:
     explicit simple_file_sink(const filename_t &filename,
-                              bool force_flush = false) :
+                              bool force_flush = false,
+                              bool truncate = false) :
         _file_helper(force_flush)
     {
-        _file_helper.open(filename);
+        _file_helper.open(filename, truncate);
     }
     void flush() override
     {
diff --git a/include/spdlog/spdlog.h b/include/spdlog/spdlog.h
index ff1b6022..e2b8ba4b 100644
--- a/include/spdlog/spdlog.h
+++ b/include/spdlog/spdlog.h
@@ -71,8 +71,8 @@ void set_sync_mode();
 //
 // Create and register multi/single basic file logger
 //
-std::shared_ptr<logger> basic_logger_mt(const std::string& logger_name, const filename_t& filename,bool force_flush = false);
-std::shared_ptr<logger> basic_logger_st(const std::string& logger_name, const filename_t& filename, bool force_flush = false);
+std::shared_ptr<logger> basic_logger_mt(const std::string& logger_name, const filename_t& filename,bool force_flush = false, bool truncate = false);
+std::shared_ptr<logger> basic_logger_st(const std::string& logger_name, const filename_t& filename, bool force_flush = false, bool truncate = false);
 
 //
 // Create and register multi/single threaded rotating file logger