/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * SECONDS() function
 *
 * Copyright 1999 Jose Lalin <dezac@corevia.com>
 * www - http://www.harbour-project.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include "hbapi.h"
#include "hbdate.h"

#include <time.h>

#if ( defined( HB_OS_BSD ) || defined( HB_OS_LINUX ) ) && !defined( __WATCOMC__ )
   #include <sys/time.h>
#else
   #include <sys/timeb.h>
#endif
#if defined( OS_UNIX_COMPATIBLE )
   #include <sys/times.h>
   #include <unistd.h>
#endif
#if defined( HB_OS_WIN_32 )
   #include <windows.h>
#elif defined(_MSC_VER)
   #define timeb _timeb
   #define ftime _ftime
#endif

HB_EXPORT void hb_dateTimeStamp( LONG * plJulian, LONG * plMilliSec )
{
#if defined(HB_OS_WIN_32)
   SYSTEMTIME st;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateTimeStamp(%p,%p)", plJulian, plMilliSec));

   GetLocalTime( &st );

   *plJulian = hb_dateEncode( st.wYear, st.wMonth, st.wDay );
   *plMilliSec = ( ( st.wHour * 60 + st.wMinute ) * 60 + st.wSecond ) * 1000 +
                 st.wMilliseconds;
#elif defined( HB_OS_LINUX ) && !defined( __WATCOMC__ )
   struct timeval tv;
   struct tm st;
   time_t seconds;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateTimeStamp(%p,%p)", plJulian, plMilliSec));

   gettimeofday( &tv, NULL );
   seconds = tv.tv_sec;
   localtime_r( &seconds, &st );
   *plJulian = hb_dateEncode( st.tm_year + 1900, st.tm_mon + 1, st.tm_mday );
   *plMilliSec = ( ( st.tm_hour * 60 + st.tm_min ) * 60 + st.tm_sec ) * 1000 +
                 tv.tv_usec / 1000;
#elif defined( HB_OS_BSD )
   struct timeval tv;
   struct tm * st;
   time_t seconds;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateTimeStamp(%p,%p)", plJulian, plMilliSec));

   gettimeofday( &tv, NULL );
   seconds = tv.tv_sec;
   st = localtime( &seconds );
   *plJulian = hb_dateEncode( st->tm_year + 1900, st->tm_mon + 1, st->tm_mday );
   *plMilliSec = ( ( st->tm_hour * 60 + st->tm_min ) * 60 + st->tm_sec ) * 1000 +
                 tv->tv_usec / 1000.0;
#else
   struct timeb tb;
   struct tm * st;
   time_t seconds;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateTimeStamp(%p,%p)", plJulian, plMilliSec));

   ftime( &tb );
   seconds = tb.time;
   st = localtime( &seconds );

   *plJulian = hb_dateEncode( st->tm_year + 1900, st->tm_mon + 1, st->tm_mday );
   *plMilliSec = ( ( st->tm_hour * 60 + st->tm_min ) * 60 + st->tm_sec ) * 1000 +
                 tb.millitm;
#endif
}

HB_EXPORT double hb_dateSeconds( void )
{
#if defined(HB_OS_WIN_32)
   SYSTEMTIME SystemTime;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateSeconds()"));

   GetLocalTime( &SystemTime );

   return ( SystemTime.wHour * 3600 ) +
          ( SystemTime.wMinute * 60 ) +
            SystemTime.wSecond +
          ( ( double ) SystemTime.wMilliseconds / 1000.0 );
#elif defined( HB_OS_LINUX ) && !defined( __WATCOMC__ )
   struct timeval tv;
   struct tm oTime;
   time_t seconds;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateSeconds()"));

   gettimeofday( &tv, NULL );
   seconds = tv.tv_sec;
   localtime_r( &seconds, &oTime );
   return ( oTime.tm_hour * 3600 ) +
          ( oTime.tm_min * 60 ) +
            oTime.tm_sec +
          ( ( double ) tv.tv_usec / 1000000.0 );
#elif defined( HB_OS_BSD )
   struct timeval tv;
   struct tm * oTime;
   time_t seconds;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateSeconds()"));

   gettimeofday( &tv, NULL );
   seconds = tv.tv_sec;
   oTime = localtime( &seconds );
   return ( oTime->tm_hour * 3600 ) +
          ( oTime->tm_min * 60 ) +
            oTime->tm_sec +
          ( ( double ) tv.tv_usec / 1000000.0 );
#else
   struct timeb tb;
   struct tm * oTime;
   time_t seconds;

   HB_TRACE(HB_TR_DEBUG, ("hb_dateSeconds()"));

   ftime( &tb );
   seconds = tb.time;
   oTime = localtime( &seconds );

   return ( oTime->tm_hour * 3600 ) +
          ( oTime->tm_min * 60 ) +
            oTime->tm_sec +
          ( ( double ) tb.millitm / 1000.0 );
#endif
}

HB_FUNC( SECONDS )
{
   hb_retnd( hb_dateSeconds() );
}

HB_FUNC( HB_CLOCKS2SECS )
{
   hb_retnd((double) hb_parnl( 1 ) / CLOCKS_PER_SEC );
}

#ifdef HB_COMPAT_FLAGSHIP

/*
   secondsCPU(n) -> nTime
   FlagShip/CLIP compatible function, which reports how many CPU and/or
   system seconds have elapsed since the beginning of the program execution.
    n == 1  utime  -> user CPU time of the current process
    n == 2  stime  -> system CPU time behalf of the current process
    n == 3  u + s  -> sum of utime + stime (default)
    n == 11 cutime -> sum of the user CPU time of the current + child process
    n == 12 cstime -> sum of the system CPU time of the current + child process
    n == 13 cu+cs  -> sum of cutime + cstime
*/
HB_EXPORT double hb_secondsCPU( int n )
{
   double d = 0.0;
#if defined( HB_OS_WIN_32 )
   FILETIME Create, Exit, Kernel, User;
#endif

   if( ( n < 1 || n > 3 ) && ( n < 11 || n > 13 ) )
      n = 3;
   
#if defined( OS_UNIX_COMPATIBLE )
   {
      struct tms tm;

      times(&tm);

      if( n > 10 )
      {
         n -= 10;
         if( n & 1 )
            d += tm.tms_cutime;
         if( n & 2 )
            d += tm.tms_cstime;
      }
      if( n & 1 )
         d += tm.tms_utime;
      if( n & 2 )
         d += tm.tms_stime;

      /* In POSIX-1996 the CLK_TCK symbol is mentioned as obsolescent */
      /* d /= CLK_TCK; */
      d /= (double) sysconf(_SC_CLK_TCK);
   }
#else
   if( n > 10 )
      n -= 10;
#if defined( HB_OS_WIN_32 )
   if( hb_iswinnt() &&
       GetProcessTimes( GetCurrentProcess(), &Create, &Exit, &Kernel, &User ) )
   {
      if( n & 1 )
      {
         d += ( double ) ( ( ( HB_LONG ) User.dwHighDateTime << 32 ) +
                             ( HB_LONG ) User.dwLowDateTime );
      }
      if( n & 2 )
      {
         d += ( double ) ( ( ( HB_LONG ) Kernel.dwHighDateTime << 32 ) +
                             ( HB_LONG ) Kernel.dwLowDateTime );
      }
      d /= 10000000.0;
   }
   else
#endif
   {
      /* TODO: this code is only for DOS and other platforms which cannot
               calculate process time */
      if( n & 1 )
         d = hb_dateSeconds(  );
   }
#endif
   return d;
}

HB_FUNC( SECONDSCPU )
{
   hb_retnd( hb_secondsCPU( hb_parni( 1 ) ) );
}

#endif