source: rtems/cpukit/rtems/src/clocktodvalidate.c @ 9d06996

4.104.11
Last change on this file since 9d06996 was 9d06996, checked in by Joel Sherrill <joel.sherrill@…>, on May 4, 2009 at 11:09:05 AM

2009-05-04 Joel Sherrill <joel.sherrill@…>

  • rtems/include/rtems/rtems/clock.h, rtems/src/clocktodtoseconds.c, rtems/src/clocktodvalidate.c: Add const to parameter.
  • Property mode set to 100644
File size: 2.1 KB
Line 
1/*
2 *  Time of Day (TOD) Handler -- Validate Classic TOD
3 *
4 *
5 *  COPYRIGHT (c) 1989-2007.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#if HAVE_CONFIG_H
16#include "config.h"
17#endif
18
19#include <rtems/system.h>
20#include <rtems/config.h>
21#include <rtems/rtems/clock.h>
22
23/*
24 *  The following array contains the number of days in all months.
25 *  The first dimension should be 1 for leap years, and 0 otherwise.
26 *  The second dimension should range from 1 to 12 for January to
27 *  February, respectively.
28 */
29const uint32_t   _TOD_Days_per_month[ 2 ][ 13 ] = {
30  { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
31  { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
32};
33
34/*PAGE
35 *
36 *  _TOD_Validate
37 *
38 *  This kernel routine checks the validity of a date and time structure.
39 *
40 *  Input parameters:
41 *    the_tod - pointer to a time and date structure
42 *
43 *  Output parameters:
44 *    true  - if the date, time, and tick are valid
45 *    false - if the the_tod is invalid
46 *
47 *  NOTE: This routine only works for leap-years through 2099.
48 */
49
50bool _TOD_Validate(
51  const rtems_time_of_day *the_tod
52)
53{
54  uint32_t   days_in_month;
55  uint32_t   ticks_per_second;
56
57  ticks_per_second = TOD_MICROSECONDS_PER_SECOND / 
58            rtems_configuration_get_microseconds_per_tick();
59  if ((!the_tod)                                  ||
60      (the_tod->ticks  >= ticks_per_second)       ||
61      (the_tod->second >= TOD_SECONDS_PER_MINUTE) ||
62      (the_tod->minute >= TOD_MINUTES_PER_HOUR)   ||
63      (the_tod->hour   >= TOD_HOURS_PER_DAY)      ||
64      (the_tod->month  == 0)                      ||
65      (the_tod->month  >  TOD_MONTHS_PER_YEAR)    ||
66      (the_tod->year   <  TOD_BASE_YEAR)          ||
67      (the_tod->day    == 0) )
68     return false;
69
70  if ( (the_tod->year % 4) == 0 )
71    days_in_month = _TOD_Days_per_month[ 1 ][ the_tod->month ];
72  else
73    days_in_month = _TOD_Days_per_month[ 0 ][ the_tod->month ];
74
75  if ( the_tod->day > days_in_month )
76    return false;
77
78  return true;
79}
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