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/* Test of obstack_[v][z]printf() functions.
Copyright (C) 2008-2025 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 Eric Blake <ebb9@byu.net>, 2008. */
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
static void
test_function (RETTYPE (*my_obstack_printf) (struct obstack *, const char *, ...))
{
struct obstack obs;
obstack_init (&obs);
/* In general, be careful that arguments to obstack_* don't have
side effects, as not all compilers evaluate macro arguments only
once. */
/* Grow the obstack to near its boundary, then check that short
output longer than the obstack free space grows the obstack. */
{
char *base = obstack_base (&obs);
char *new_base;
RETTYPE result;
int room = obstack_room (&obs) - 4;
obstack_blank_fast (&obs, room);
result = my_obstack_printf (&obs, "%d %s", 123, "456");
ASSERT (result == 7);
ASSERT (result + room == obstack_object_size (&obs));
obstack_1grow (&obs, 0);
new_base = obstack_finish (&obs);
ASSERT (base != new_base);
ASSERT (strcmp (new_base + room, "123 456") == 0);
}
/* Check that strings shorter than the obstack free space don't
cause a reshuffling of the obstack. */
{
char *base = obstack_base (&obs);
char *new_base;
RETTYPE result;
int room = obstack_room (&obs);
ASSERT (8 < room);
result = my_obstack_printf (&obs, "%d %s", 123, "456");
ASSERT (result == 7);
ASSERT (result == obstack_object_size (&obs));
new_base = obstack_base (&obs);
ASSERT (base == new_base);
ASSERT (strncmp (base, "123 456", result) == 0);
obstack_finish (&obs);
}
/* Check for generating much more output than a chunk size. */
{
char *base = obstack_base (&obs);
char *new_base;
RETTYPE result;
int i;
ASSERT (obstack_chunk_size (&obs) < 10000);
result = my_obstack_printf (&obs, "%010000d", 0);
ASSERT (result == 10000);
ASSERT (result == obstack_object_size (&obs));
new_base = obstack_base (&obs);
ASSERT (base != new_base);
for (i = 0; i < 10000; i++)
ASSERT (new_base[i] == '0');
}
obstack_free (&obs, NULL);
}
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