/**
 * @file
 *
 * @ingroup RTEMSImplClassicClock
 *
 * @brief This source file contains the implementation of
 *   _TOD_Validate().
 */

/*
 *  COPYRIGHT (c) 1989-2007.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/rtems/clockimpl.h>
#include <rtems/score/todimpl.h>
#include <rtems/config.h>

/*
 *  The following array contains the number of days in all months.
 *  The first dimension should be 1 for leap years, and 0 otherwise.
 *  The second dimension should range from 1 to 12 for January to
 *  February, respectively.
 */
const uint32_t   _TOD_Days_per_month[ 2 ][ 13 ] = {
  { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
  { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
};

rtems_status_code _TOD_Validate(
  const rtems_time_of_day *the_tod
)
{
  uint32_t   days_in_month;
  uint32_t   ticks_per_second;

  if ( the_tod == NULL ) {
    return RTEMS_INVALID_ADDRESS;
  }

  ticks_per_second = TOD_MICROSECONDS_PER_SECOND /
	    rtems_configuration_get_microseconds_per_tick();
  if ((the_tod->ticks  >= ticks_per_second)       ||
      (the_tod->second >= TOD_SECONDS_PER_MINUTE) ||
      (the_tod->minute >= TOD_MINUTES_PER_HOUR)   ||
      (the_tod->hour   >= TOD_HOURS_PER_DAY)      ||
      (the_tod->month  == 0)                      ||
      (the_tod->month  >  TOD_MONTHS_PER_YEAR)    ||
      (the_tod->year   <  TOD_BASE_YEAR)          ||
      (the_tod->year   >  TOD_LATEST_YEAR)        ||
      (the_tod->day    == 0) ) {
    return RTEMS_INVALID_CLOCK;
  }

  if (((the_tod->year % 4) == 0 && (the_tod->year % 100 != 0)) ||
     (the_tod->year % 400 == 0))
    days_in_month = _TOD_Days_per_month[ 1 ][ the_tod->month ];
  else
    days_in_month = _TOD_Days_per_month[ 0 ][ the_tod->month ];

  if ( the_tod->day > days_in_month ) {
    return RTEMS_INVALID_CLOCK;
  }

  return RTEMS_SUCCESSFUL;
}