wcsmbs/tst-wcslcat.c

   1 /* Test the wcslcat function.
   2    Copyright (C) 2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <array_length.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <support/check.h>
  23 #include <wchar.h>
  24
  25 static int
  26 do_test (void)
  27 {
  28   struct {
  29     wchar_t buf1[16];
  30     wchar_t buf2[16];
  31   } s;
  32
  33   /* Nothing is written to the destination if its size is 0.  */
  34   wmemset (s.buf1, '@', array_length (s.buf1));
  35   wmemset (s.buf2, '@', array_length (s.buf2));
  36   TEST_COMPARE (wcslcat (s.buf1, L"", 0), 0);
  37   TEST_COMPARE_BLOB (&s, sizeof (s), L"@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
  38   TEST_COMPARE (wcslcat (s.buf1, L"Hello!", 0), 6);
  39   TEST_COMPARE_BLOB (&s, sizeof (s), L"@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
  40
  41   /* No bytes are are modified in the target buffer if the source
  42      string is short enough.  */
  43   wmemset (s.buf1, '@', array_length (s.buf1));
  44   wmemset (s.buf2, '@', array_length (s.buf2));
  45   wcscpy (s.buf1, L"He");
  46   TEST_COMPARE (wcslcat (s.buf1, L"llo!", array_length (s.buf1)), 6);
  47   TEST_COMPARE_BLOB (&s, sizeof (s), L"Hello!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
  48
  49   /* A source string which fits exactly into the destination buffer is
  50      not truncated.  */
  51   wmemset (s.buf1, '@', array_length (s.buf1));
  52   wmemset (s.buf2, '@', array_length (s.buf2));
  53   wcscpy (s.buf1, L"H");
  54   TEST_COMPARE (wcslcat (s.buf1, L"ello, world!!!", array_length (s.buf1)),
  55                 15);
  56   TEST_COMPARE_BLOB (&s, sizeof (s),
  57                      L"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
  58
  59   /* A source string one character longer than the destination buffer
  60      is truncated by one character.  The total length is returned.  */
  61   wmemset (s.buf1, '@', array_length (s.buf1));
  62   wmemset (s.buf2, '@', array_length (s.buf2));
  63   wcscpy (s.buf1, L"Hello");
  64   TEST_COMPARE (wcslcat (s.buf1, L", world!!!!", array_length (s.buf1)), 16);
  65   TEST_COMPARE_BLOB (&s, sizeof (s),
  66                      L"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
  67
  68   /* An even longer source string is truncated as well, and the total
  69      length is returned.  */
  70   wmemset (s.buf1, '@', array_length (s.buf1));
  71   wmemset (s.buf2, '@', array_length (s.buf2));
  72   wcscpy (s.buf1, L"Hello,");
  73   TEST_COMPARE (wcslcat (s.buf1, L" world!!!!!!!!", array_length (s.buf1)),
  74                 20);
  75   TEST_COMPARE_BLOB (&s, sizeof (s),
  76                      L"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
  77
  78   /* A destination string which is not NUL-terminated does not result
  79      in any changes to the buffer.  */
  80   wmemset (s.buf1, '$', array_length (s.buf1));
  81   wmemset (s.buf2, '@', array_length (s.buf2));
  82   TEST_COMPARE (wcslcat (s.buf1, L"", array_length (s.buf1)), 16);
  83   TEST_COMPARE_BLOB (&s, sizeof (s), L"$$$$$$$$$$$$$$$$@@@@@@@@@@@@@@@@", 128);
  84   TEST_COMPARE (wcslcat (s.buf1, L"Hello!", array_length (s.buf1)), 22);
  85   TEST_COMPARE_BLOB (&s, sizeof (s), L"$$$$$$$$$$$$$$$$@@@@@@@@@@@@@@@@", 128);
  86   TEST_COMPARE (wcslcat (s.buf1, L"Hello, world!!!!!!!!",
  87                          array_length (s.buf1)), 36);
  88   TEST_COMPARE_BLOB (&s, sizeof (s), L"$$$$$$$$$$$$$$$$@@@@@@@@@@@@@@@@", 128);
  89
  90   return 0;
  91 }
  92
  93 #include <support/test-driver.c>