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/*
Copyright (C) 2015-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <scratch_buffer.h>
#include <support/check.h>
#include <support/support.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
static bool
unchanged_array_size (struct scratch_buffer *buf, size_t a, size_t b)
{
size_t old_length = buf->length;
if (!scratch_buffer_set_array_size (buf, a, b))
{
printf ("scratch_buffer_set_array_size failed: %zu %zu\n",
a, b);
return false;
}
if (old_length != buf->length)
{
printf ("scratch_buffer_set_array_size did not preserve size: %zu %zu\n",
a, b);
return false;
}
return true;
}
static bool
array_size_must_fail (size_t a, size_t b)
{
for (int pass = 0; pass < 2; ++pass)
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
if (pass > 0)
if (!scratch_buffer_grow (&buf))
{
printf ("scratch_buffer_grow in array_size_must_fail failed\n");
return false;
}
if (scratch_buffer_set_array_size (&buf, a, b))
{
printf ("scratch_buffer_set_array_size passed: %d %zu %zu\n",
pass, a, b);
return false;
}
if (buf.data != buf.__space.__c)
{
printf ("scratch_buffer_set_array_size did not free: %d %zu %zu\n",
pass, a, b);
return false;
}
}
return true;
}
static int
do_test (void)
{
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
memset (buf.data, ' ', buf.length);
scratch_buffer_free (&buf);
}
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
memset (buf.data, ' ', buf.length);
size_t old_length = buf.length;
scratch_buffer_grow (&buf);
if (buf.length <= old_length)
{
printf ("scratch_buffer_grow did not enlarge buffer\n");
return 1;
}
memset (buf.data, ' ', buf.length);
scratch_buffer_free (&buf);
}
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
memset (buf.data, '@', buf.length);
strcpy (buf.data, "prefix");
size_t old_length = buf.length;
scratch_buffer_grow_preserve (&buf);
if (buf.length <= old_length)
{
printf ("scratch_buffer_grow_preserve did not enlarge buffer\n");
return 1;
}
if (strcmp (buf.data, "prefix") != 0)
{
printf ("scratch_buffer_grow_preserve did not copy buffer\n");
return 1;
}
for (unsigned i = 7; i < old_length; ++i)
if (((char *)buf.data)[i] != '@')
{
printf ("scratch_buffer_grow_preserve did not copy buffer (%u)\n",
i);
return 1;
}
scratch_buffer_free (&buf);
}
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
for (int pass = 0; pass < 4; ++pass)
{
if (!(unchanged_array_size (&buf, 0, 0)
&& unchanged_array_size (&buf, 1, 0)
&& unchanged_array_size (&buf, 0, 1)
&& unchanged_array_size (&buf, -1, 0)
&& unchanged_array_size (&buf, 0, -1)
&& unchanged_array_size (&buf, 1ULL << 16, 0)
&& unchanged_array_size (&buf, 0, 1ULL << 16)
&& unchanged_array_size (&buf, (size_t) (1ULL << 32), 0)
&& unchanged_array_size (&buf, 0, (size_t) (1ULL << 32))))
return 1;
if (!scratch_buffer_grow (&buf))
{
printf ("scratch_buffer_grow_failed (pass %d)\n", pass);
}
}
scratch_buffer_free (&buf);
}
{
if (!(array_size_must_fail (-1, 1)
&& array_size_must_fail (-1, -1)
&& array_size_must_fail (1, -1)
&& array_size_must_fail (((size_t)-1) / 4, 4)
&& array_size_must_fail (4, ((size_t)-1) / 4)))
return 1;
}
return 0;
}
#include <support/test-driver.c>
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