ptime.cxx

mgcp协议源代码。支持多种编码：g711

  PString fmt, dsep;

  PString tsep = GetTimeSeparator();
  BOOL is12hour = GetTimeAMPM();

  switch (format & 7) {
    case LongDateTime :
    case LongTime :
    case MediumDateTime :
    case ShortDateTime :
    case ShortTime :
      if (!is12hour)
        fmt = "h";

      fmt += "h" + tsep + "mm";

      switch (format) {
        case LongDateTime :
        case LongTime :
          fmt += tsep + "ss";

        default :
          break;
      }

      if (is12hour)
        fmt += "a";
      break;

    default :
      break;
  }

  switch (format & 7) {
    case LongDateTime :
    case MediumDateTime :
    case ShortDateTime :
      fmt += ' ';
      break;

    default :
      break;
  }

  switch (format & 7) {
    case LongDateTime :
    case LongDate :
      fmt += "wwww ";
      switch (GetDateOrder()) {
        case MonthDayYear :
          fmt += "MMMM d, yyyy";
          break;
        case DayMonthYear :
          fmt += "d MMMM yyyy";
          break;
        case YearMonthDay :
          fmt += "yyyy MMMM d";
      }
      break;

    case MediumDateTime :
    case MediumDate :
      fmt += "www ";
      switch (GetDateOrder()) {
        case MonthDayYear :
          fmt += "MMM d, yy";
          break;
        case DayMonthYear :
          fmt += "d MMM yy";
          break;
        case YearMonthDay :
          fmt += "yy MMM d";
      }
      break;

    case ShortDateTime :
    case ShortDate :
      dsep = GetDateSeparator();
      switch (GetDateOrder()) {
        case MonthDayYear :
          fmt += "MM" + dsep + "dd" + dsep + "yy";
          break;
        case DayMonthYear :
          fmt += "dd" + dsep + "MM" + dsep + "yy";
          break;
        case YearMonthDay :
          fmt += "yy" + dsep + "MM" + dsep + "dd";
      }
      break;

    default :
      break;
  }

  if (zone != Local)
    fmt += " z";

  return AsString(fmt, zone);
}


PString PTime::AsString(const char * format, int zone) const
{
  PAssert(format != NULL, PInvalidParameter);

  BOOL is12hour = strchr(format, 'a') != NULL;

  PStringStream str;
  str.fill('0');

  // the localtime call automatically adjusts for daylight savings time
  // so take this into account when converting non-local times
  if (zone == Local)
    zone = GetTimeZone();  // includes daylight savings time
  time_t realTime = theTime + zone*60;     // to correct timezone
  struct tm ts;
  struct tm * t = os_gmtime(&realTime, &ts);

  PINDEX repeatCount;

  while (*format != '\0') {
    repeatCount = 1;
    switch (*format) {
      case 'a' :
        while (*++format == 'a')
          ;
        if (t->tm_hour < 12)
          str << GetTimeAM();
        else
          str << GetTimePM();
        break;

      case 'h' :
        while (*++format == 'h')
          repeatCount++;
        str << setw(repeatCount) << (is12hour ? (t->tm_hour+11)%12+1 : t->tm_hour);
        break;

      case 'm' :
        while (*++format == 'm')
          repeatCount++;
        str << setw(repeatCount) << t->tm_min;
        break;

      case 's' :
        while (*++format == 's')
          repeatCount++;
        str << setw(repeatCount) << t->tm_sec;
        break;

      case 'w' :
        while (*++format == 'w')
          repeatCount++;
        if (repeatCount != 3 || *format != 'e')
          str << GetDayName((Weekdays)t->tm_wday, repeatCount <= 3 ? Abbreviated : FullName);
        else {
          static const char * const EnglishDayName[] = {
            "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
          };
          str << EnglishDayName[t->tm_wday];
          format++;
        }
        break;

      case 'M' :
        while (*++format == 'M')
          repeatCount++;
        if (repeatCount < 3)
          str << setw(repeatCount) << (t->tm_mon+1);
        else if (repeatCount > 3 || *format != 'E')
          str << GetMonthName((Months)(t->tm_mon+1),
                                    repeatCount == 3 ? Abbreviated : FullName);
        else {
          static const char * const EnglishMonthName[] = {
            "Jan", "Feb", "Mar", "Apr", "May", "Jun",
            "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
          };
          str << EnglishMonthName[t->tm_mon];
          format++;
        }
        break;

      case 'd' :
        while (*++format == 'd')
          repeatCount++;
        str << setw(repeatCount) << t->tm_mday;
        break;

      case 'y' :
        while (*++format == 'y')
          repeatCount++;
        if (repeatCount < 3)
          str << setw(2) << (t->tm_year%100);
        else
          str << setw(4) << (t->tm_year+1900);
        break;

      case 'z' :
        while (*++format == 'z')
          ;
        if (zone == 0)
          str << "GMT";
        else {
          str << (zone < 0 ? '-' : '+');
          zone = PABS(zone);
          str << setw(2) << (zone/60) << setw(2) << (zone%60);
        }
        break;

      case 'u' :
        while (*++format == 'u')
          repeatCount++;
        switch (repeatCount) {
          case 1 :
            str << ((microseconds+50000)/100000);
            break;
          case 2 :
            str << setw(2) << ((microseconds+5000)/10000);
            break;
          case 3 :
            str << setw(3) << ((microseconds+500)/1000);
            break;
          default :
            str << setw(6) << microseconds;
            break;
        }
        break;

      default :
        str << *format++;
    }
  }

  return str;
}

///////////////////////////////////////////////////////////
//
//  Time parser
//

extern "C" {

#ifndef STDAPICALLTYPE
#define STDAPICALLTYPE
#endif

time_t STDAPICALLTYPE PTimeParse(void *, struct tm *, int);

int STDAPICALLTYPE PTimeGetChar(void * stream)
{
  return ((istream *)stream)->get();
}


void STDAPICALLTYPE PTimeUngetChar(void * stream, int c)
{
  ((istream *)stream)->putback((char)c);
}


int STDAPICALLTYPE PTimeGetDateOrder()
{
  return PTime::GetDateOrder();
}


int STDAPICALLTYPE PTimeIsMonthName(const char * str, int month, int abbrev)
{
  return PTime::GetMonthName((PTime::Months)month,
                             abbrev ? PTime::Abbreviated : PTime::FullName) *= str;
}


int STDAPICALLTYPE PTimeIsDayName(const char * str, int day, int abbrev)
{
  return PTime::GetDayName((PTime::Weekdays)day,
                             abbrev ? PTime::Abbreviated : PTime::FullName) *= str;
}


};



void PTime::ReadFrom(istream & strm)
{
  time_t now;
  struct tm timeBuf;
  time(&now);
  microseconds = 0;
  theTime = PTimeParse(&strm, os_localtime(&now, &timeBuf), GetTimeZone());
}



PTime PTime::operator+(const PTimeInterval & t) const
{
  PInt64 msecs = (PInt64)theTime*1000 + t.GetMilliSeconds();
  return PTime((time_t)(msecs/1000), (long)(msecs%1000)*1000);
}


PTime & PTime::operator+=(const PTimeInterval & t)
{
  PInt64 msecs = (PInt64)theTime*1000 + t.GetMilliSeconds();
  theTime = (time_t)(msecs/1000);
  microseconds = (long)(msecs%1000)*1000;
  return *this;
}


PTimeInterval PTime::operator-(const PTime & t) const
{
  time_t secs = theTime - t.theTime;
  long usecs = microseconds - t.microseconds;
  if (usecs < 0) {
    usecs += 1000000;
    secs--;
  }
  else if (usecs >= 1000000) {
    usecs -= 1000000;
    secs++;
  }
  return PTimeInterval(usecs/1000, secs);
}


PTime PTime::operator-(const PTimeInterval & t) const
{
  time_t secs = theTime - t.GetSeconds();
  long msecs = (long)(microseconds/1000 - t.GetMilliSeconds()%1000);
  if (msecs < 0) {
    msecs += 1000;
    secs--;
  }
  else if (msecs >= 1000) {
    msecs -= 1000;
    secs++;
  }
  return PTime(secs, msecs*1000);
}


PTime & PTime::operator-=(const PTimeInterval & t)
{
  theTime -= t.GetSeconds();
  microseconds -= (long)(t.GetMilliSeconds()%1000)*1000;
  if (microseconds < 0) {
    microseconds += 1000000;
    theTime--;
  }
  else if (microseconds >= 1000000) {
    microseconds -= 1000000;
    theTime++;
  }
  return *this;
}


// End Of File ///////////////////////////////////////////////////////////////