/* name:    timestamp.cxx
   author:  the C++ course @X
   purpose: example for INF585 - time stamp method implementation
   source:  GNU C++
   history: 100126 work started
*/

#include <iostream>
#include <sys/time.h>
#include <ctime>
#include "timestamp.h"

TimeStamp::TimeStamp() : timestamp(0) { 
  using namespace std;
  cout << "TimeStamp constructor: called by " << this << endl;
}

TimeStamp::~TimeStamp() { 
  using namespace std;
  cout << "TimeStamp destructor: called by " << this << endl;
}

void TimeStamp::update(void) throw (TimeStampException) {
  using namespace std;
  struct timeval tv;
  struct timezone tz;

  try {
    int ret = gettimeofday(&tv, &tz);
  } catch (...) {
    std::cout << "catching all exceptions" << std::endl;
    throw TimeStampException();
  }

  timestamp = tv.tv_sec;
}

long TimeStamp::get(void) const {
  return timestamp;
}

TimeStampException::TimeStampException() {}

TimeStampException::~TimeStampException() {}

std::ostream& operator<< (std::ostream& s, TimeStamp& t) 
  throw (TimeStampException) {
  using namespace std;
  time_t theTime = (time_t) t.get();
  char* buffer;
  try {
    buffer = ctime(&theTime);
  } catch (...) {
    cerr << "TimeStamp::operator<<(): error: couldn't call ctime()\n";
    throw TimeStampException();
  }
  buffer[strlen(buffer) - 1] = '\0';
  s << buffer;
  return s;
}