src/time.cc

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