From 065483dae36df452c5e512707c91f68c218c98de Mon Sep 17 00:00:00 2001
From: Abdelrazak Younes <younes@lyx.org>
Date: Sat, 18 Dec 2010 18:40:21 +0000
Subject: [PATCH] Small Timer helper class useful for performance investigation
 in src/.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@36940 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/support/Timeout.cpp | 83 +++++++++++++++++++++++++++++++++++++++++
 src/support/Timeout.h   | 21 +++++++++++
 2 files changed, 104 insertions(+)

diff --git a/src/support/Timeout.cpp b/src/support/Timeout.cpp
index 127d3bd008..7639fa600d 100644
--- a/src/support/Timeout.cpp
+++ b/src/support/Timeout.cpp
@@ -17,6 +17,10 @@
 #include <QObject>
 #include <QTimerEvent>
 
+#include <ctime>
+#include <iomanip>
+#include <sstream>
+
 using namespace std;
 
 namespace lyx {
@@ -142,4 +146,83 @@ Timeout & Timeout::setTimeout(unsigned int msec)
 }
 
 
+struct Timer::Private
+{
+	time_t start_time;
+};
+
+
+Timer::Timer() : d(new Private)
+{
+	restart();
+}
+
+
+void Timer::restart()
+{
+	time(&d->start_time);
+}
+
+
+int Timer::elapsed() const
+{
+	time_t end_time;
+	time(&end_time);
+	double diff = difftime(end_time, d->start_time);
+	return int(diff);
+}
+
+
+string Timer::timeStr(char separator) const
+{
+	tm * timeinfo = localtime(&d->start_time);
+	// With less flexibility we could also use:
+	//strftime(buffer, 10, "%X", timeinfo);
+	ostringstream out;
+	out << setw(2) << setfill('0');
+	if (separator) {
+		out << separator << setw(2) << setfill('0') << timeinfo->tm_hour
+		    << separator << setw(2) << setfill('0') << timeinfo->tm_min
+		    << separator << setw(2) << setfill('0') << timeinfo->tm_sec;
+	} else {
+		out << setw(2) << setfill('0') << timeinfo->tm_hour
+		    << setw(2) << setfill('0') << timeinfo->tm_min
+		    << setw(2) << setfill('0') << timeinfo->tm_sec;
+	}
+	return out.str();
+}
+
+
+string Timer::dateStr(char separator) const
+{
+	tm * timeinfo = localtime(&d->start_time);
+	// With less flexibility we could also use:
+	//res = strftime(buffer, 10, "%d%m%y", timeinfo);
+	ostringstream out;
+	out << setw(2) << setfill('0') << timeinfo->tm_mday;
+	if (separator)
+		out << separator;
+	out << setw(2) << setfill('0') << timeinfo->tm_mon;
+	if (separator)
+		out << separator;
+	out << setw(2) << setfill('0') << timeinfo->tm_year - 100;
+	return out.str();
+}
+
+
+string Timer::toStr() const
+{
+	tm * timeinfo = localtime(&d->start_time);
+	return asctime(timeinfo);
+}
+
+
+string Timer::currentToStr()
+{
+	time_t current_time;
+	time(&current_time);
+	tm * timeinfo = localtime(&current_time);
+	return asctime(timeinfo);
+}
+
 } // namespace lyx
diff --git a/src/support/Timeout.h b/src/support/Timeout.h
index 28b00333be..de3062ae73 100644
--- a/src/support/Timeout.h
+++ b/src/support/Timeout.h
@@ -64,6 +64,27 @@ private:
 	unsigned int timeout_ms;
 };
 
+// Small Timer class useful for debugging and performance investigation.
+class Timer
+{
+public:
+	Timer();
+	///
+	void restart();
+	///
+	int elapsed() const;
+	///
+	std::string dateStr(char separator = 0) const;
+	///
+	std::string timeStr(char separator = 0) const;
+	///
+	std::string toStr() const;
+	///
+	static std::string currentToStr();
+private:
+	struct Private;
+	Private * d;
+};
 
 } // namespace lyx