src/time.cc

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 21    Time Functions */
  10
  11 #include "squid.h"
  12 #include "SquidTime.h"
  13
  14 struct timeval current_time;
  15 double current_dtime;
  16 time_t squid_curtime = 0;
  17
  18 time_t
  19 getCurrentTime(void)
  20 {
  21 #if GETTIMEOFDAY_NO_TZP
  22     gettimeofday(&current_time);
  23 #else
  24
  25     gettimeofday(&current_time, NULL);
  26 #endif
  27
  28     current_dtime = (double) current_time.tv_sec +
  29                     (double) current_time.tv_usec / 1000000.0;
  30     return squid_curtime = current_time.tv_sec;
  31 }
  32
  33 int
  34 tvSubMsec(struct timeval t1, struct timeval t2)
  35 {
  36     return (t2.tv_sec - t1.tv_sec) * 1000 +
  37            (t2.tv_usec - t1.tv_usec) / 1000;
  38 }
  39
  40 TimeEngine::~TimeEngine()
  41 {}
  42
  43 void
  44 TimeEngine::tick()
  45 {
  46     getCurrentTime();
  47 }
  48
  49 const char *
  50 Time::FormatStrf(time_t t)
  51 {
  52     struct tm *tm;
  53     static char buf[128];
  54     static time_t last_t = 0;
  55
  56     if (t != last_t) {
  57         tm = localtime(&t);
  58         strftime(buf, 127, "%Y/%m/%d %H:%M:%S", tm);
  59         last_t = t;
  60     }
  61
  62     return buf;
  63 }
  64
  65 const char *
  66 Time::FormatHttpd(time_t t)
  67 {
  68     static char buf[128];
  69     static time_t last_t = 0;
  70
  71     if (t != last_t) {
  72         struct tm *gmt = gmtime(&t);
  73
  74 #if !USE_GMT
  75         int gmt_min, gmt_hour, gmt_yday, day_offset;
  76         size_t len;
  77         struct tm *lt;
  78         int min_offset;
  79
  80         /* localtime & gmtime may use the same static data */
  81         gmt_min = gmt->tm_min;
  82         gmt_hour = gmt->tm_hour;
  83         gmt_yday = gmt->tm_yday;
  84
  85         lt = localtime(&t);
  86
  87         day_offset = lt->tm_yday - gmt_yday;
  88         /* wrap round on end of year */
  89         if (day_offset > 1)
  90             day_offset = -1;
  91         else if (day_offset < -1)
  92             day_offset = 1;
  93
  94         min_offset = day_offset * 1440 + (lt->tm_hour - gmt_hour) * 60
  95                      + (lt->tm_min - gmt_min);
  96
  97         len = strftime(buf, 127 - 5, "%d/%b/%Y:%H:%M:%S ", lt);
  98         snprintf(buf + len, 128 - len, "%+03d%02d",
  99                  (min_offset / 60) % 24,
 100                  min_offset % 60);
 101 #else /* USE_GMT */
 102         buf[0] = '\0';
 103         strftime(buf, 127, "%d/%b/%Y:%H:%M:%S -000", gmt);
 104 #endif /* USE_GMT */
 105
 106         last_t = t;
 107     }
 108
 109     return buf;
 110 }