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glibc  2.9
Defines | Functions | Variables
tst-mktime2.c File Reference
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define N_STRINGS   ((int) (sizeof (tz_strings) / sizeof (tz_strings[0])))
#define TEST_FUNCTION   do_test ()

Functions

static void spring_forward_gap (void)
static void mktime_test1 (time_t now)
static void mktime_test (time_t now)
static void irix_6_4_bug (void)
static void bigtime_test (int j)
static int do_test (void)

Variables

static time_t time_t_max
static time_t time_t_min
static const char * tz_strings []

Define Documentation

#define N_STRINGS   ((int) (sizeof (tz_strings) / sizeof (tz_strings[0])))

Definition at line 15 of file tst-mktime2.c.

#define TEST_FUNCTION   do_test ()

Definition at line 141 of file tst-mktime2.c.


Function Documentation

static void bigtime_test ( int  j) [static]

Definition at line 76 of file tst-mktime2.c.

{
  struct tm tm;
  time_t now;
  tm.tm_year = tm.tm_mon = tm.tm_mday = tm.tm_hour = tm.tm_min = tm.tm_sec = j;
  tm.tm_isdst = -1;
  now = mktime (&tm);
  if (now != (time_t) -1)
    {
      struct tm *lt = localtime (&now);
      if (! (lt
            && lt->tm_year == tm.tm_year
            && lt->tm_mon == tm.tm_mon
            && lt->tm_mday == tm.tm_mday
            && lt->tm_hour == tm.tm_hour
            && lt->tm_min == tm.tm_min
            && lt->tm_sec == tm.tm_sec
            && lt->tm_yday == tm.tm_yday
            && lt->tm_wday == tm.tm_wday
            && ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst)
                == (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst))))
       exit (4);
    }
}

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static int do_test ( void  ) [static]

Definition at line 102 of file tst-mktime2.c.

{
  time_t t, delta;
  int i;
  unsigned int j;

  setenv ("TZ", "America/Sao_Paulo", 1);
  /* This test makes some buggy mktime implementations loop.
     Give up after 60 seconds; a mktime slower than that
     isn't worth using anyway.  */
  alarm (60);

  for (time_t_max = 1; 0 < time_t_max; time_t_max *= 2)
    continue;
  time_t_max--;
  if ((time_t) -1 < 0)
    for (time_t_min = -1; (time_t) (time_t_min * 2) < 0; time_t_min *= 2)
      continue;
  delta = time_t_max / 997; /* a suitable prime number */
  for (i = 0; i < N_STRINGS; i++)
    {
      if (tz_strings[i])
       setenv ("TZ", tz_strings[i], 1);

      for (t = 0; t <= time_t_max - delta; t += delta)
       mktime_test (t);
      mktime_test ((time_t) 1);
      mktime_test ((time_t) (60 * 60));
      mktime_test ((time_t) (60 * 60 * 24));

      for (j = 1; j <= INT_MAX; j *= 2)
       bigtime_test (j);
      bigtime_test (j - 1);
    }
  irix_6_4_bug ();
  spring_forward_gap ();
  return 0;
}

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static void irix_6_4_bug ( void  ) [static]

Definition at line 59 of file tst-mktime2.c.

{
  /* Based on code from Ariel Faigon.  */
  struct tm tm;
  tm.tm_year = 96;
  tm.tm_mon = 3;
  tm.tm_mday = 0;
  tm.tm_hour = 0;
  tm.tm_min = 0;
  tm.tm_sec = 0;
  tm.tm_isdst = -1;
  mktime (&tm);
  if (tm.tm_mon != 2 || tm.tm_mday != 31)
    exit (3);
}

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static void mktime_test ( time_t  now) [static]

Definition at line 51 of file tst-mktime2.c.

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static void mktime_test1 ( time_t  now) [static]

Definition at line 43 of file tst-mktime2.c.

{
  struct tm *lt = localtime (&now);
  if (lt && mktime (lt) != now)
    exit (2);
}

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static void spring_forward_gap ( void  ) [static]

Definition at line 20 of file tst-mktime2.c.

{
  /* glibc (up to about 1998-10-07) failed this test. */
  struct tm tm;

  /* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0"
     instead of "TZ=America/Vancouver" in order to detect the bug even
     on systems that don't support the Olson extension, or don't have the
     full zoneinfo tables installed.  */
  setenv ("TZ", "PST8PDT,M4.1.0,M10.5.0", 1);

  tm.tm_year = 98;
  tm.tm_mon = 3;
  tm.tm_mday = 5;
  tm.tm_hour = 2;
  tm.tm_min = 0;
  tm.tm_sec = 0;
  tm.tm_isdst = -1;
  if (mktime (&tm) == (time_t)-1)
    exit (1);
}

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Variable Documentation

time_t time_t_max [static]

Definition at line 6 of file tst-mktime2.c.

time_t time_t_min [static]

Definition at line 7 of file tst-mktime2.c.

const char* tz_strings[] [static]
Initial value:
  {
    (const char *) 0, "GMT0", "JST-9",
    "EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00"
  }

Definition at line 10 of file tst-mktime2.c.