os_brew/ctime.c

   1 /*-
   2  * See the file LICENSE for redistribution information.
   3  *
   4  * Copyright (c) 2001-2009 Oracle.  All rights reserved.
   5  *
   6  * $Id$
   7  */
   8
   9 #include "db_config.h"
  10
  11 #include "db_int.h"
  12
  13 static void  __os_brew_ct_numb __P((char *, int));
  14
  15 /*
  16  * __os_ctime --
  17  *      Format a time-stamp.
  18  */
  19 char *
  20 __os_ctime(tod, time_buf)
  21         const time_t *tod;
  22         char *time_buf;
  23 {
  24         JulianType jt;
  25         time_t tt;
  26         char *ncp;
  27
  28         strcpy(time_buf, "Thu Jan 01 00:00:00 1970");
  29         time_buf[CTIME_BUFLEN - 1] = '\0';
  30
  31         /*
  32          * Berkeley DB uses POSIX time values internally, convert to a BREW
  33          * time value.
  34          */
  35         tt = *tod - BREW_EPOCH_OFFSET + LOCALTIMEOFFSET(NULL);
  36         GETJULIANDATE(tt, &jt);
  37
  38         /*
  39          * wWeekDay : Day of the week 0-6 (0=Monday, 6=Sunday)
  40          */
  41         ncp = &"MonTueWedThuFriSatSun"[jt.wWeekDay*3];
  42         time_buf[0] = *ncp++;
  43         time_buf[1] = *ncp++;
  44         time_buf[2] = *ncp;
  45         ncp = &"JanFebMarAprMayJunJulAugSepOctNovDec"[(jt.wMonth - 1) * 3];
  46         time_buf[4] = *ncp++;
  47         time_buf[5] = *ncp++;
  48         time_buf[6] = *ncp;
  49
  50         __os_brew_ct_numb(time_buf + 8, jt.wDay);
  51                                         /* Add 100 to keep the leading zero. */
  52         __os_brew_ct_numb(time_buf + 11, jt.wHour + 100);
  53         __os_brew_ct_numb(time_buf + 14, jt.wMinute + 100);
  54         __os_brew_ct_numb(time_buf + 17, jt.wSecond + 100);
  55
  56         if (jt.wYear < 100) {           /* 9 99 */
  57                 time_buf[20] = ' ';
  58                 time_buf[21] = ' ';
  59                 __os_brew_ct_numb(time_buf + 22, jt.wYear);
  60         } else {                        /* 99 1999 */
  61                 __os_brew_ct_numb(time_buf + 20, jt.wYear / 100);
  62                 __os_brew_ct_numb(time_buf + 22, jt.wYear % 100 + 100);
  63         }
  64
  65         return (time_buf);
  66 }
  67
  68 /*
  69  * __os_brew_ct_numb --
  70  *      Append ASCII representations for two digits to a string.
  71  */
  72 static void
  73 __os_brew_ct_numb(cp, n)
  74         char *cp;
  75         int n;
  76 {
  77         cp[0] = ' ';
  78         if (n >= 10)
  79                 cp[0] = (n / 10) % 10 + '0';
  80         cp[1] = n % 10 + '0';
  81 }