76 lines
2 KiB
C
76 lines
2 KiB
C
/* Test of <byteswap.h> substitute.
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Copyright (C) 2007-2025 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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#include <config.h>
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#include <byteswap.h>
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#include <stdint.h>
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#include "macros.h"
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/* Test bswap functions with constant values. */
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static void
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test_bswap_constant (void)
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{
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ASSERT (bswap_16 (UINT16_C (0x1234)) == UINT16_C (0x3412));
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ASSERT (bswap_32 (UINT32_C (0x12345678)) == UINT32_C (0x78563412));
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#ifdef UINT_LEAST64_MAX
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ASSERT (bswap_64 (UINT64_C (0x1234567890ABCDEF))
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== UINT64_C (0xEFCDAB9078563412));
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#endif
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}
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/* Test that the bswap functions evaluate their arguments once. */
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static void
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test_bswap_eval_once (void)
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{
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uint_least16_t value_1 = 0;
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ASSERT (bswap_16 (value_1++) == 0);
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ASSERT (value_1 == 1);
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uint_least32_t value_2 = 0;
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ASSERT (bswap_32 (value_2++) == 0);
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ASSERT (value_2 == 1);
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#ifdef UINT_LEAST64_MAX
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uint_least64_t value_3 = 0;
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ASSERT (bswap_64 (value_3++) == 0);
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ASSERT (value_3 == 1);
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#endif
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}
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/* Test that the bswap functions accept floating-point arguments. */
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static void
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test_bswap_double (void)
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{
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ASSERT (bswap_16 (0.0) == 0);
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ASSERT (bswap_32 (0.0) == 0);
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#ifdef UINT_LEAST64_MAX
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ASSERT (bswap_64 (0.0) == 0);
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#endif
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}
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int
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main (void)
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{
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test_bswap_constant ();
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test_bswap_eval_once ();
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test_bswap_double ();
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return test_exit_status;
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}
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