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ps2time.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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
 * of the License, 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include "backends/platform/ps2/systemps2.h"
#include "backends/platform/ps2/ps2debug.h"
#include "eecodyvdfs.h"
#include <osd_config.h>
#include <time.h>

#define FROM_BCD(a) ((a >> 4) * 10 + (a & 0xF))

static int    g_timeSecs;
static int    g_day, g_month, g_year;
static int    g_lastTimeCheck;
extern volatile uint32 msecCount;

void buildNewDate(int dayDiff) {
      static int daysPerMonth[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
      if (((g_year % 4) == 0) && (((g_year % 100) != 0) || ((g_year % 1000) == 0)))
            daysPerMonth[1] = 29;
      else
            daysPerMonth[1] = 28;

      if (dayDiff == -1) {
            g_day--;
            if (g_day == 0) {
                  g_month--;
                  if (g_month == 0) {
                        g_year--;
                        g_month = 12;
                  }
                  g_day = daysPerMonth[g_month - 1];
            }
      } else if (dayDiff == 1) {
            g_day++;
            if (g_day > daysPerMonth[g_month - 1]) {
                  g_day = 1;
                  g_month++;
                  if (g_month > 12) {
                        g_month = 1;
                        g_year++;
                  }
            }
      }
}

#define SECONDS_PER_DAY (24 * 60 * 60)

void OSystem_PS2::readRtcTime(void) {
      struct CdClock cdClock;
      readRTC(&cdClock);

      g_lastTimeCheck = getMillis();

      if (cdClock.stat) {
            msgPrintf(5000, "Unable to read RTC time, EC: %d\n", cdClock.stat);
            g_day = g_month = 1;
            g_year = 0;
            g_timeSecs = 0;
      } else {
            int gmtOfs = configGetTimezone();
            if (configIsDaylightSavingEnabled())
                  gmtOfs += 60;

            int timeSecs = (FROM_BCD(cdClock.hour) * 60 + FROM_BCD(cdClock.minute)) * 60 + FROM_BCD(cdClock.second);
            timeSecs -= 9 * 60 * 60; // minus 9 hours, JST -> GMT conversion
            timeSecs += gmtOfs * 60; // GMT -> timezone the user selected

            g_day = FROM_BCD(cdClock.day);
            g_month = FROM_BCD(cdClock.month);
            g_year = FROM_BCD(cdClock.year);

            if (timeSecs < 0) {
                  buildNewDate(-1);
                  timeSecs += SECONDS_PER_DAY;
            } else if (timeSecs >= SECONDS_PER_DAY) {
                  buildNewDate(+1);
                  timeSecs -= SECONDS_PER_DAY;
            }
            g_timeSecs = (uint32)timeSecs;
      }

      sioprintf("Time: %d:%02d:%02d - %d.%d.%4d\n", g_timeSecs / (60 * 60), (g_timeSecs / 60) % 60, g_timeSecs % 60,
            g_day, g_month, g_year + 2000);
}

00109 void OSystem_PS2::getTimeAndDate(TimeDate &t) const {

      uint32 currentSecs = g_timeSecs + (msecCount - g_lastTimeCheck) / 1000;
      if (currentSecs >= SECONDS_PER_DAY) {
            buildNewDate(+1);
            g_lastTimeCheck += SECONDS_PER_DAY * 1000;
            currentSecs = g_timeSecs + (msecCount - g_lastTimeCheck) / 1000;
      }

      t.tm_hour = currentSecs / (60 * 60);
      t.tm_min  = (currentSecs / 60) % 60;
      t.tm_sec  = currentSecs % 60;
      t.tm_year = g_year + 100;
      t.tm_mday = g_day;
      t.tm_mon  = g_month - 1;
}

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