time/tst-strftime.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <time.h>
   4
   5
   6 static struct
   7 {
   8   const char *fmt;
   9   size_t min;
  10   size_t max;
  11 } tests[] =
  12   {
  13     { "%2000Y", 2000, 4000 },
  14     { "%02000Y", 2000, 4000 },
  15     { "%_2000Y", 2000, 4000 },
  16     { "%-2000Y", 2000, 4000 },
  17   };
  18 #define ntests (sizeof (tests) / sizeof (tests[0]))
  19
  20
  21 static int
  22 do_test (void)
  23 {
  24   size_t cnt;
  25   int result = 0;
  26
  27   time_t tnow = time (NULL);
  28   struct tm *now = localtime (&tnow);
  29
  30   for (cnt = 0; cnt < ntests; ++cnt)
  31     {
  32       size_t size = 0;
  33       int res;
  34       char *buf = NULL;
  35
  36       do
  37         {
  38           size += 500;
  39           buf = (char *) realloc (buf, size);
  40           if (buf == NULL)
  41             {
  42               puts ("out of memory");
  43               exit (1);
  44             }
  45
  46           res = strftime (buf, size, tests[cnt].fmt, now);
  47           if (res != 0)
  48             break;
  49         }
  50       while (size < tests[cnt].max);
  51
  52       if (res == 0)
  53         {
  54           printf ("%Zu: %s: res == 0 despite size == %Zu\n",
  55                   cnt, tests[cnt].fmt, size);
  56           result = 1;
  57         }
  58       else if (size < tests[cnt].min)
  59         {
  60           printf ("%Zu: %s: size == %Zu was enough\n",
  61                   cnt, tests[cnt].fmt, size);
  62           result = 1;
  63         }
  64       else
  65         printf ("%Zu: %s: size == %Zu: OK\n", cnt, tests[cnt].fmt, size);
  66
  67       free (buf);
  68     }
  69
  70   return result;
  71 }
  72
  73 #define TEST_FUNCTION do_test ()
  74 #include "../test-skeleton.c"