src/time.cc

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG: section 21    Time Functions
   5  * AUTHOR: Harvest Derived
   6  *
   7  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   8  * ----------------------------------------------------------
   9  *
  10  *  Squid is the result of efforts by numerous individuals from
  11  *  the Internet community; see the CONTRIBUTORS file for full
  12  *  details.   Many organizations have provided support for Squid's
  13  *  development; see the SPONSORS file for full details.  Squid is
  14  *  Copyrighted (C) 2001 by the Regents of the University of
  15  *  California; see the COPYRIGHT file for full details.  Squid
  16  *  incorporates software developed and/or copyrighted by other
  17  *  sources; see the CREDITS file for full details.
  18  *
  19  *  This program is free software; you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License as published by
  21  *  the Free Software Foundation; either version 2 of the License, or
  22  *  (at your option) any later version.
  23  *
  24  *  This program is distributed in the hope that it will be useful,
  25  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *  GNU General Public License for more details.
  28  *
  29  *  You should have received a copy of the GNU General Public License
  30  *  along with this program; if not, write to the Free Software
  31  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  32  *
  33  */
  34 #include "squid.h"
  35 #include "SquidTime.h"
  36
  37 struct timeval current_time;
  38 double current_dtime;
  39 time_t squid_curtime = 0;
  40
  41 time_t
  42 getCurrentTime(void)
  43 {
  44 #if GETTIMEOFDAY_NO_TZP
  45     gettimeofday(&current_time);
  46 #else
  47
  48     gettimeofday(&current_time, NULL);
  49 #endif
  50
  51     current_dtime = (double) current_time.tv_sec +
  52                     (double) current_time.tv_usec / 1000000.0;
  53     return squid_curtime = current_time.tv_sec;
  54 }
  55
  56 int
  57 tvSubMsec(struct timeval t1, struct timeval t2)
  58 {
  59     return (t2.tv_sec - t1.tv_sec) * 1000 +
  60            (t2.tv_usec - t1.tv_usec) / 1000;
  61 }
  62
  63 TimeEngine::~TimeEngine()
  64 {}
  65
  66 void
  67 TimeEngine::tick()
  68 {
  69     getCurrentTime();
  70 }
  71
  72 const char *
  73 Time::FormatStrf(time_t t)
  74 {
  75     struct tm *tm;
  76     static char buf[128];
  77     static time_t last_t = 0;
  78
  79     if (t != last_t) {
  80         tm = localtime(&t);
  81         strftime(buf, 127, "%Y/%m/%d %H:%M:%S", tm);
  82         last_t = t;
  83     }
  84
  85     return buf;
  86 }
  87
  88 const char *
  89 Time::FormatHttpd(time_t t)
  90 {
  91     static char buf[128];
  92     static time_t last_t = 0;
  93
  94     if (t != last_t) {
  95         struct tm *gmt = gmtime(&t);
  96
  97 #if !USE_GMT
  98         int gmt_min, gmt_hour, gmt_yday, day_offset;
  99         size_t len;
 100         struct tm *lt;
 101         int min_offset;
 102
 103         /* localtime & gmtime may use the same static data */
 104         gmt_min = gmt->tm_min;
 105         gmt_hour = gmt->tm_hour;
 106         gmt_yday = gmt->tm_yday;
 107
 108         lt = localtime(&t);
 109
 110         day_offset = lt->tm_yday - gmt_yday;
 111         /* wrap round on end of year */
 112         if (day_offset > 1)
 113             day_offset = -1;
 114         else if (day_offset < -1)
 115             day_offset = 1;
 116
 117         min_offset = day_offset * 1440 + (lt->tm_hour - gmt_hour) * 60
 118                      + (lt->tm_min - gmt_min);
 119
 120         len = strftime(buf, 127 - 5, "%d/%b/%Y:%H:%M:%S ", lt);
 121         snprintf(buf + len, 128 - len, "%+03d%02d",
 122                  (min_offset / 60) % 24,
 123                  min_offset % 60);
 124 #else /* USE_GMT */
 125         buf[0] = '\0';
 126         strftime(buf, 127, "%d/%b/%Y:%H:%M:%S -000", gmt);
 127 #endif /* USE_GMT */
 128
 129         last_t = t;
 130     }
 131
 132     return buf;
 133 }