incremental
diff --git a/g3log/filesink.cpp b/g3log/filesink.cpp
new file mode 100644
index 0000000..bfe8d5c
--- /dev/null
+++ b/g3log/filesink.cpp
@@ -0,0 +1,92 @@
+/** ==========================================================================
+ * 2013 by KjellKod.cc. This is PUBLIC DOMAIN to use at your own risk and comes
+ * with no warranties. This code is yours to share, use and modify with no
+ * strings attached and no restrictions or obligations.
+ *
+ * For more information see g3log/LICENSE or refer refer to http://unlicense.org
+ * ============================================================================*/
+
+#include "g3log/filesink.hpp"
+#include "filesinkhelper.ipp"
+#include <cassert>
+
+namespace g3 {
+ using namespace internal;
+
+
+ FileSink::FileSink(const std::string &log_prefix, const std::string &log_directory, const std::string& logger_id)
+ : _log_file_with_path(log_directory)
+ , _log_prefix_backup(log_prefix)
+ , _outptr(new std::ofstream)
+ {
+ _log_prefix_backup = prefixSanityFix(log_prefix);
+ if (!isValidFilename(_log_prefix_backup)) {
+ std::cerr << "g3log: forced abort due to illegal log prefix [" << log_prefix << "]" << std::endl;
+ abort();
+ }
+
+ std::string file_name = createLogFileName(_log_prefix_backup, logger_id);
+ _log_file_with_path = pathSanityFix(_log_file_with_path, file_name);
+ _outptr = createLogFile(_log_file_with_path);
+
+ if (!_outptr) {
+ std::cerr << "Cannot write log file to location, attempting current directory" << std::endl;
+ _log_file_with_path = "./" + file_name;
+ _outptr = createLogFile(_log_file_with_path);
+ }
+ assert(_outptr && "cannot open log file at startup");
+ addLogFileHeader();
+ }
+
+
+ FileSink::~FileSink() {
+ std::string exit_msg {"g3log g3FileSink shutdown at: "};
+ exit_msg.append(localtime_formatted(systemtime_now(), internal::time_formatted)).append({"\n"});
+ filestream() << exit_msg << std::flush;
+
+ exit_msg.append({"Log file at: ["}).append(_log_file_with_path).append({"]\n"});
+ std::cerr << exit_msg << std::flush;
+ }
+
+ // The actual log receiving function
+ void FileSink::fileWrite(LogMessageMover message) {
+ std::ofstream &out(filestream());
+ out << message.get().toString() << std::flush;
+ }
+
+ std::string FileSink::changeLogFile(const std::string &directory, const std::string &logger_id) {
+
+ auto now = g3::systemtime_now();
+ auto now_formatted = g3::localtime_formatted(now, {internal::date_formatted + " " + internal::time_formatted});
+
+ std::string file_name = createLogFileName(_log_prefix_backup, logger_id);
+ std::string prospect_log = directory + file_name;
+ std::unique_ptr<std::ofstream> log_stream = createLogFile(prospect_log);
+ if (nullptr == log_stream) {
+ filestream() << "\n" << now_formatted << " Unable to change log file. Illegal filename or busy? Unsuccessful log name was: " << prospect_log;
+ return {}; // no success
+ }
+
+ addLogFileHeader();
+ std::ostringstream ss_change;
+ ss_change << "\n\tChanging log file from : " << _log_file_with_path;
+ ss_change << "\n\tto new location: " << prospect_log << "\n";
+ filestream() << now_formatted << ss_change.str();
+ ss_change.str("");
+
+ std::string old_log = _log_file_with_path;
+ _log_file_with_path = prospect_log;
+ _outptr = std::move(log_stream);
+ ss_change << "\n\tNew log file. The previous log file was at: ";
+ ss_change << old_log;
+ filestream() << now_formatted << ss_change.str();
+ return _log_file_with_path;
+ }
+ std::string FileSink::fileName() {
+ return _log_file_with_path;
+ }
+ void FileSink::addLogFileHeader() {
+ filestream() << header();
+ }
+
+} // g3