libio/tst_swprintf.c

   1 #include <array_length.h>
   2 #include <errno.h>
   3 #include <stdio.h>
   4 #include <support/check.h>
   5 #include <sys/types.h>
   6 #include <wchar.h>
   7
   8
   9 static wchar_t buf[100];
  10 static const struct
  11 {
  12   size_t n;
  13   const char *str;
  14   ssize_t exp;
  15 } tests[] =
  16   {
  17     { array_length (buf), "hello world", 11 },
  18     { 0, "hello world", -1 },
  19     { 1, "hello world", -1 },
  20     { 2, "hello world", -1 },
  21     { 11, "hello world", -1 },
  22     { 12, "hello world", 11 },
  23     { 0, "", -1 },
  24     { array_length (buf), "", 0 }
  25   };
  26
  27 static int
  28 do_test (void)
  29 {
  30   size_t n;
  31
  32   TEST_COMPARE (swprintf (buf, array_length (buf), L"Hello %s", "world"), 11);
  33   TEST_COMPARE_STRING_WIDE (buf, L"Hello world");
  34
  35   TEST_COMPARE (swprintf (buf, array_length (buf), L"Is this >%g< 3.1?", 3.1),
  36                 18);
  37   TEST_COMPARE_STRING_WIDE (buf, L"Is this >3.1< 3.1?");
  38
  39   for (n = 0; n < array_length (tests); ++n)
  40     {
  41       wmemset (buf, 0xabcd, array_length (buf));
  42       errno = 0;
  43       ssize_t res = swprintf (buf, tests[n].n, L"%s", tests[n].str);
  44
  45       if (tests[n].exp < 0 && res >= 0)
  46         {
  47           support_record_failure ();
  48           printf ("swprintf (buf, %zu, L\"%%s\", \"%s\") expected to fail\n",
  49                   tests[n].n, tests[n].str);
  50         }
  51       else if (tests[n].exp >= 0 && tests[n].exp != res)
  52         {
  53           support_record_failure ();
  54           printf ("\
  55 swprintf (buf, %zu, L\"%%s\", \"%s\") expected to return %zd, but got %zd\n",
  56                   tests[n].n, tests[n].str, tests[n].exp, res);
  57         }
  58       else if (res < 0
  59                && tests[n].n > 0
  60                && wcsnlen (buf, array_length (buf)) == array_length (buf))
  61         {
  62           support_record_failure ();
  63           printf ("\
  64 error: swprintf (buf, %zu, L\"%%s\", \"%s\") missing null terminator\n",
  65                   tests[n].n, tests[n].str);
  66         }
  67       else if (res < 0
  68                && tests[n].n > 0
  69                && wcsnlen (buf, array_length (buf)) < array_length (buf)
  70                && buf[wcsnlen (buf, array_length (buf)) + 1] != 0xabcd)
  71         {
  72           support_record_failure ();
  73           printf ("\
  74 error: swprintf (buf, %zu, L\"%%s\", \"%s\") out of bounds write\n",
  75                   tests[n].n, tests[n].str);
  76         }
  77
  78       if (res < 0 && tests[n].n < 0)
  79         TEST_COMPARE (errno, E2BIG);
  80
  81       printf ("swprintf (buf, %zu, L\"%%s\", \"%s\") OK\n",
  82               tests[n].n, tests[n].str);
  83     }
  84
  85   TEST_COMPARE (swprintf (buf, array_length (buf), L"%.0s", "foo"), 0);
  86   TEST_COMPARE_STRING_WIDE (buf, L"");
  87
  88   TEST_COMPARE (swprintf (buf, array_length (buf), L"%.0ls", L"foo"), 0);
  89   TEST_COMPARE_STRING_WIDE (buf, L"");
  90
  91   return 0;
  92 }
  93
  94 #include <support/test-driver.c>