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/* Test of uN_strncat() functions.
Copyright (C) 2010-2021 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
static void
check_single (const UNIT *input, size_t length, size_t n)
{
static const UNIT base[] = { 'C', 'h', 'a', 'n', 'g', 'i', 'n', 'g', 0 };
size_t m;
for (m = 0; m < SIZEOF (base); m++)
{
UNIT *dest;
UNIT *result;
size_t i;
dest = (UNIT *) malloc ((1 + m + n + 2) * sizeof (UNIT));
ASSERT (dest != NULL);
dest[0] = MAGIC;
for (i = 0; i < m; i++)
dest[1 + i] = base[i];
dest[1 + m] = 0;
for (i = 1; i < n + 2; i++)
dest[1 + m + i] = MAGIC;
result = U_STRNCAT (dest + 1, input, n);
ASSERT (result == dest + 1);
ASSERT (dest[0] == MAGIC);
for (i = 0; i < m; i++)
ASSERT (dest[1 + i] == base[i]);
for (i = 0; i < (n <= length ? n : length); i++)
ASSERT (dest[1 + m + i] == input[i]);
ASSERT (dest[1 + m + i] == 0);
ASSERT (dest[1 + m + i + 1] == MAGIC);
free (dest);
}
}
static void
check (const UNIT *input, size_t input_length)
{
size_t length;
size_t n;
ASSERT (input_length > 0);
ASSERT (input[input_length - 1] == 0);
length = input_length - 1; /* = U_STRLEN (input) */
for (n = 0; n <= 2 * length + 2; n++)
check_single (input, length, n);
/* Check that U_STRNCAT (D, S, N) does not look at more than
MIN (U_STRLEN (S) + 1, N) units. */
{
char *page_boundary = (char *) zerosize_ptr ();
if (page_boundary != NULL)
{
for (n = 0; n <= 2 * length + 2; n++)
{
size_t n_to_copy = (n <= length ? n : length + 1);
UNIT *copy;
size_t i;
copy = (UNIT *) page_boundary - n_to_copy;
for (i = 0; i < n_to_copy; i++)
copy[i] = input[i];
check_single (copy, length, n);
}
}
}
}
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