tests/unistdio/test-u32-asnprintf1.h

   1 /* Test of u32_[v]asnprintf() function.
   2    Copyright (C) 2007, 2009-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 static void
  20 test_function (uint32_t * (*my_asnprintf) (uint32_t *, size_t *, const char *, ...))
  21 {
  22   uint32_t buf[8];
  23   int size;
  24
  25   /* Test return value convention.  */
  26
  27   for (size = 0; size <= 8; size++)
  28     {
  29       size_t length = size;
  30       uint32_t *result = my_asnprintf (NULL, &length, "%d", 12345);
  31       static const uint32_t expected[] =
  32         { '1', '2', '3', '4', '5', 0 };
  33       ASSERT (result != NULL);
  34       ASSERT (u32_strcmp (result, expected) == 0);
  35       ASSERT (length == 5);
  36       free (result);
  37     }
  38
  39   for (size = 0; size <= 8; size++)
  40     {
  41       static const uint32_t initializer[] =
  42         { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F', 0 };
  43       static const uint32_t expected[] =
  44         { '1', '2', '3', '4', '5', 0 };
  45       size_t length;
  46       uint32_t *result;
  47
  48       u32_cpy (buf, initializer, 8);
  49       length = size;
  50       result = my_asnprintf (buf, &length, "%d", 12345);
  51       ASSERT (result != NULL);
  52       ASSERT (u32_strcmp (result, expected) == 0);
  53       ASSERT (length == 5);
  54       if (size < 6)
  55         ASSERT (result != buf);
  56       ASSERT (u32_cmp (buf + size, initializer + size, 8 - size) == 0);
  57       if (result != buf)
  58         free (result);
  59     }
  60
  61   /* Verify that u32_[v]asnprintf() rejects a width > 2 GiB, < 4 GiB.  */
  62   {
  63     size_t length;
  64     uint32_t *s = my_asnprintf (NULL, &length, "x%03000000000dy\n", -17);
  65     ASSERT (s == NULL);
  66     ASSERT (errno == EOVERFLOW);
  67   }
  68   {
  69     static const uint32_t arg[] = { '@', 0 };
  70     size_t length;
  71     uint32_t *s = my_asnprintf (NULL, &length, "x%03000000000llUy\n", arg);
  72     ASSERT (s == NULL);
  73     ASSERT (errno == EOVERFLOW);
  74   }
  75
  76   /* Verify that u32_[v]asnprintf() rejects a width > 4 GiB.  */
  77   {
  78     size_t length;
  79     uint32_t *s =
  80       my_asnprintf (NULL, &length,
  81                     "x%04294967306dy\n", /* 2^32 + 10 */
  82                     -17);
  83     ASSERT (s == NULL);
  84     ASSERT (errno == EOVERFLOW);
  85   }
  86   {
  87     static const uint32_t arg[] = { '@', 0 };
  88     size_t length;
  89     uint32_t *s =
  90       my_asnprintf (NULL, &length,
  91                     "x%04294967306llUy\n", /* 2^32 + 10 */
  92                     arg);
  93     ASSERT (s == NULL);
  94     ASSERT (errno == EOVERFLOW);
  95   }
  96   {
  97     size_t length;
  98     uint32_t *s =
  99       my_asnprintf (NULL, &length,
 100                     "x%018446744073709551626dy\n", /* 2^64 + 10 */
 101                     -17);
 102     ASSERT (s == NULL);
 103     ASSERT (errno == EOVERFLOW);
 104   }
 105   {
 106     static const uint32_t arg[] = { '@', 0 };
 107     size_t length;
 108     uint32_t *s =
 109       my_asnprintf (NULL, &length,
 110                     "x%018446744073709551626llUy\n", /* 2^64 + 10 */
 111                     arg);
 112     ASSERT (s == NULL);
 113     ASSERT (errno == EOVERFLOW);
 114   }
 115 }