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/* Test of scratch_buffer functions.
Copyright (C) 2018-2026 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>, 2018. */
#include <config.h>
#include <scratch_buffer.h>
#include <string.h>
#include "macros.h"
static int
byte_at (unsigned long long int i)
{
return ((i % 13) + ((i * i) % 251)) & 0xff;
}
int
main ()
{
/* Check scratch_buffer_set_array_size. */
{
size_t sizes[] = { 100, 1000, 10000, 100000 };
for (size_t s = 0; s < SIZEOF (sizes); s++)
{
size_t size = sizes[s];
struct scratch_buffer buf;
bool ok;
scratch_buffer_init (&buf);
ok = scratch_buffer_set_array_size (&buf, size, 1);
ASSERT (ok);
for (size_t i = 0; i < size; i++)
((unsigned char *) buf.data)[i] = byte_at (i);
memset (buf.data, 'x', buf.length);
memset (buf.data, 'y', size);
scratch_buffer_free (&buf);
}
}
/* Check scratch_buffer_grow. */
{
size_t sizes[] = { 100, 1000, 10000, 100000 };
for (size_t s = 0; s < SIZEOF (sizes); s++)
{
size_t size = sizes[s];
struct scratch_buffer buf;
bool ok;
scratch_buffer_init (&buf);
while (buf.length < size)
{
ok = scratch_buffer_grow (&buf);
ASSERT (ok);
}
for (size_t i = 0; i < size; i++)
((unsigned char *) buf.data)[i] = byte_at (i);
memset (buf.data, 'x', buf.length);
memset (buf.data, 'y', size);
scratch_buffer_free (&buf);
}
}
/* Check scratch_buffer_grow_preserve. */
{
size_t sizes[] = { 100, 1000, 10000, 100000 };
struct scratch_buffer buf;
size_t s;
size_t size;
bool ok;
scratch_buffer_init (&buf);
s = 0;
size = sizes[s];
ok = scratch_buffer_set_array_size (&buf, size, 1);
ASSERT (ok);
for (size_t i = 0; i < size; i++)
((unsigned char *) buf.data)[i] = byte_at (i);
for (; s < SIZEOF (sizes); s++)
{
size_t oldsize = size;
size = sizes[s];
while (buf.length < size)
{
ok = scratch_buffer_grow_preserve (&buf);
ASSERT (ok);
}
for (size_t i = 0; i < oldsize; i++)
ASSERT(((unsigned char *) buf.data)[i] == byte_at (i));
for (size_t i = oldsize; i < size; i++)
((unsigned char *) buf.data)[i] = byte_at (i);
}
scratch_buffer_free (&buf);
}
return test_exit_status;
}
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