fixed some issues

Thirdparty/DBoW2/DUtils/Timestamp.h

@@ -0,0 +1,204 @@
+/*
+ * File: Timestamp.h
+ * Author: Dorian Galvez-Lopez
+ * Date: March 2009
+ * Description: timestamping functions
+ * License: see the LICENSE.txt file
+ *
+ */
+
+#ifndef __D_TIMESTAMP__
+#define __D_TIMESTAMP__
+
+#include <iostream>
+using namespace std;
+
+namespace DUtils {
+
+/// Timestamp
+class Timestamp
+{
+public:
+
+  /// Options to initiate a timestamp
+  enum tOptions
+  {
+    NONE = 0,
+    CURRENT_TIME = 0x1,
+    ZERO = 0x2
+  };
+  
+public:
+  
+  /**
+   * Creates a timestamp 
+   * @param option option to set the initial time stamp
+   */
+	Timestamp(Timestamp::tOptions option = NONE);
+	
+	/**
+	 * Destructor
+	 */
+	virtual ~Timestamp(void);
+
+  /**
+   * Says if the timestamp is "empty": seconds and usecs are both 0, as 
+   * when initiated with the ZERO flag
+   * @return true iif secs == usecs == 0
+   */
+  bool empty() const;
+
+	/**
+	 * Sets this instance to the current time
+	 */
+	void setToCurrentTime();
+
+	/**
+	 * Sets the timestamp from seconds and microseconds
+	 * @param secs: seconds
+	 * @param usecs: microseconds
+	 */
+	inline void setTime(unsigned long secs, unsigned long usecs){
+		m_secs = secs;
+		m_usecs = usecs;
+	}
+	
+	/**
+	 * Returns the timestamp in seconds and microseconds
+	 * @param secs seconds
+	 * @param usecs microseconds
+	 */
+	inline void getTime(unsigned long &secs, unsigned long &usecs) const
+	{
+	  secs = m_secs;
+	  usecs = m_usecs;
+	}
+
+	/**
+	 * Sets the timestamp from a string with the time in seconds
+	 * @param stime: string such as "1235603336.036609"
+	 */
+	void setTime(const string &stime);
+	
+	/**
+	 * Sets the timestamp from a number of seconds from the epoch
+	 * @param s seconds from the epoch
+	 */
+	void setTime(double s);
+	
+	/**
+	 * Returns this timestamp as the number of seconds in (long) float format
+	 */
+	double getFloatTime() const;
+
+	/**
+	 * Returns this timestamp as the number of seconds in fixed length string format
+	 */
+	string getStringTime() const;
+
+	/**
+	 * Returns the difference in seconds between this timestamp (greater) and t (smaller)
+	 * If the order is swapped, a negative number is returned
+	 * @param t: timestamp to subtract from this timestamp
+	 * @return difference in seconds
+	 */
+	double operator- (const Timestamp &t) const;
+
+	/** 
+	 * Returns a copy of this timestamp + s seconds + us microseconds
+	 * @param s seconds
+	 * @param us microseconds
+	 */
+	Timestamp plus(unsigned long s, unsigned long us) const;
+
+  /**
+   * Returns a copy of this timestamp - s seconds - us microseconds
+   * @param s seconds
+   * @param us microseconds
+   */
+  Timestamp minus(unsigned long s, unsigned long us) const;
+
+  /**
+   * Adds s seconds to this timestamp and returns a reference to itself
+   * @param s seconds
+   * @return reference to this timestamp
+   */
+  Timestamp& operator+= (double s);
+  
+  /**
+   * Substracts s seconds to this timestamp and returns a reference to itself
+   * @param s seconds
+   * @return reference to this timestamp
+   */
+  Timestamp& operator-= (double s);
+
+	/**
+	 * Returns a copy of this timestamp + s seconds
+	 * @param s: seconds
+	 */
+	Timestamp operator+ (double s) const;
+
+	/**
+	 * Returns a copy of this timestamp - s seconds
+	 * @param s: seconds
+	 */
+	Timestamp operator- (double s) const;
+
+	/**
+	 * Returns whether this timestamp is at the future of t
+	 * @param t
+	 */
+	bool operator> (const Timestamp &t) const;
+
+	/**
+	 * Returns whether this timestamp is at the future of (or is the same as) t
+	 * @param t
+	 */
+	bool operator>= (const Timestamp &t) const;
+
+	/** 
+	 * Returns whether this timestamp and t represent the same instant
+	 * @param t
+	 */
+	bool operator== (const Timestamp &t) const;
+
+	/**
+	 * Returns whether this timestamp is at the past of t
+	 * @param t
+	 */
+	bool operator< (const Timestamp &t) const;
+
+	/**
+	 * Returns whether this timestamp is at the past of (or is the same as) t
+	 * @param t
+	 */
+	bool operator<= (const Timestamp &t) const;
+
+  /**
+   * Returns the timestamp in a human-readable string
+   * @param machine_friendly if true, the returned string is formatted
+   *   to yyyymmdd_hhmmss, without weekday or spaces
+   * @note This has not been tested under Windows
+   * @note The timestamp is truncated to seconds
+   */
+  string Format(bool machine_friendly = false) const;
+
+	/**
+	 * Returns a string version of the elapsed time in seconds, with the format
+	 * xd hh:mm:ss, hh:mm:ss, mm:ss or s.us
+	 * @param s: elapsed seconds (given by getFloatTime) to format
+	 */
+	static string Format(double s);
+	
+
+protected:
+  /// Seconds
+	unsigned long m_secs;	// seconds
+	/// Microseconds
+	unsigned long m_usecs;	// microseconds
+};
+
+}
+
+#endif
+