JDate.hh

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#ifndef __JSYSTEM__JDATE__
#define __JSYSTEM__JDATE__

#include <string>
#include <time.h>

/**
 * \file
 * Date and time functions.
 * \author mdejong
 */
namespace JSYSTEM {}
namespace JPP { using namespace JSYSTEM; }

namespace JSYSTEM {
  
  /**
   * Get ASCII formatted date.
   *
   * \return          date
   */
  inline const char* getDate()
  {
    static time_t    ts;
    static const int        MAX_SIZE = 256;
    static char      buffer[MAX_SIZE];

    time(&ts);

    strftime(buffer, MAX_SIZE, "%x", localtime(&ts));
      
    return buffer;
  }

  
  /**
   * Get ASCII formatted time.
   *
   * \return          time
   */
  inline const char* getTime()
  {
    static time_t    ts;
    static const int        MAX_SIZE = 256;
    static char      buffer[MAX_SIZE];

    time(&ts);

    strftime(buffer, MAX_SIZE, "%X", localtime(&ts));
      
    return buffer;
  }

  
  /**
   * Auxililary class to get ASCII formatted date and time.
   */
  class JDateAndTime {
  public:

    /**
     * Default constructor.
     */
    JDateAndTime()
    {}


    /**
     * Get ASCII formatted date and time.
     *
     * \return          date and time
     */
    inline std::string toString() const
    {
      time(&ts);

      return toString(ts);
    }


    /**
     * Get ASCII formatted date and time.
     *
     * \return          date and time
     */
    inline std::string operator()() const
    {
      return toString();
    }


    /**
     * Get ASCII formatted date and time.
     *
     * \param  ts       time structure
     * \return          date and time
     */
    static std::string toString(const time_t& ts)
    {
      std::string buffer = ctime(&ts);
      
      // remove the last character (carriage return) from the date string

      return buffer.substr(0, buffer.length() - 1);
    }

  private:
    mutable time_t ts;
  };


  /**
   * Function object to get ASCII formatted date and time.
   */
  static const JDateAndTime getDateAndTime;
}

#endif