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/* Test of <byteswap.h> substitute.
Copyright (C) 2007-2024 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>, 2007. */
#include <config.h>
#include <byteswap.h>
#include <stdint.h>
#include "macros.h"
/* Test bswap functions with constant values. */
static void
test_bswap_constant (void)
{
ASSERT (bswap_16 (UINT16_C (0x1234)) == UINT16_C (0x3412));
ASSERT (bswap_32 (UINT32_C (0x12345678)) == UINT32_C (0x78563412));
#ifdef UINT_LEAST64_MAX
ASSERT (bswap_64 (UINT64_C (0x1234567890ABCDEF))
== UINT64_C (0xEFCDAB9078563412));
#endif
}
/* Test that the bswap functions evaluate their arguments once. */
static void
test_bswap_eval_once (void)
{
uint_least16_t value_1 = 0;
ASSERT (bswap_16 (value_1++) == 0);
ASSERT (value_1 == 1);
uint_least32_t value_2 = 0;
ASSERT (bswap_32 (value_2++) == 0);
ASSERT (value_2 == 1);
#ifdef UINT_LEAST64_MAX
uint_least64_t value_3 = 0;
ASSERT (bswap_64 (value_3++) == 0);
ASSERT (value_3 == 1);
#endif
}
/* Test that the bswap functions accept floating-point arguments. */
static void
test_bswap_double (void)
{
ASSERT (bswap_16 (0.0) == 0);
ASSERT (bswap_32 (0.0) == 0);
#ifdef UINT_LEAST64_MAX
ASSERT (bswap_64 (0.0) == 0);
#endif
}
int
main (void)
{
test_bswap_constant ();
test_bswap_eval_once ();
test_bswap_double ();
return test_exit_status;
}
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