time/tst-strftime.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <time.h>
   5
   6
   7 static struct
   8 {
   9   const char *fmt;
  10   size_t min;
  11   size_t max;
  12 } tests[] =
  13   {
  14     { "%2000Y", 2000, 4000 },
  15     { "%02000Y", 2000, 4000 },
  16     { "%_2000Y", 2000, 4000 },
  17     { "%-2000Y", 2000, 4000 },
  18   };
  19 #define ntests (sizeof (tests) / sizeof (tests[0]))
  20
  21
  22 static int
  23 do_test (void)
  24 {
  25   size_t cnt;
  26   int result = 0;
  27
  28   time_t tnow = time (NULL);
  29   struct tm *now = localtime (&tnow);
  30
  31   for (cnt = 0; cnt < ntests; ++cnt)
  32     {
  33       size_t size = 0;
  34       int res;
  35       char *buf = NULL;
  36
  37       do
  38         {
  39           size += 500;
  40           buf = (char *) realloc (buf, size);
  41           if (buf == NULL)
  42             {
  43               puts ("out of memory");
  44               exit (1);
  45             }
  46
  47           res = strftime (buf, size, tests[cnt].fmt, now);
  48           if (res != 0)
  49             break;
  50         }
  51       while (size < tests[cnt].max);
  52
  53       if (res == 0)
  54         {
  55           printf ("%Zu: %s: res == 0 despite size == %Zu\n",
  56                   cnt, tests[cnt].fmt, size);
  57           result = 1;
  58         }
  59       else if (size < tests[cnt].min)
  60         {
  61           printf ("%Zu: %s: size == %Zu was enough\n",
  62                   cnt, tests[cnt].fmt, size);
  63           result = 1;
  64         }
  65       else
  66         printf ("%Zu: %s: size == %Zu: OK\n", cnt, tests[cnt].fmt, size);
  67
  68       free (buf);
  69     }
  70
  71   struct tm ttm =
  72     {
  73       /* Initialize the fields which are needed in the tests.  */
  74       .tm_mday = 1,
  75       .tm_hour = 2
  76     };
  77   const struct
  78   {
  79     const char *fmt;
  80     const char *exp;
  81     size_t n;
  82   } ftests[] =
  83     {
  84       { "%-e", "1", 1 },
  85       { "%-k", "2", 1 },
  86       { "%-l", "2", 1 },
  87     };
  88 #define nftests (sizeof (ftests) / sizeof (ftests[0]))
  89   for (cnt = 0; cnt < nftests; ++cnt)
  90     {
  91       char buf[100];
  92       size_t r = strftime (buf, sizeof (buf), ftests[cnt].fmt, &ttm);
  93       if (r != ftests[cnt].n)
  94         {
  95           printf ("strftime(\"%s\") returned %zu not %zu\n",
  96                   ftests[cnt].fmt, r, ftests[cnt].n);
  97           result = 1;
  98         }
  99       if (strcmp (buf, ftests[cnt].exp) != 0)
 100         {
 101           printf ("strftime(\"%s\") produced \"%s\" not \"%s\"\n",
 102                   ftests[cnt].fmt, buf, ftests[cnt].exp);
 103           result = 1;
 104         }
 105     }
 106
 107   return result;
 108 }
 109
 110 #define TEST_FUNCTION do_test ()
 111 #include "../test-skeleton.c"