1 /* Copyright (C) 2000-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <byteswap.h>
19 #include <stdio.h>
20
21 extern unsigned long long int wash (unsigned long long int a);
22
23 int
do_test(void)24 do_test (void)
25 {
26 int result = 0;
27
28 /* Test the functions with constant arguments. */
29 if (bswap_16 (0x1234) != 0x3412)
30 {
31 puts ("bswap_16 (constant) flunked");
32 result = 1;
33 }
34 if (bswap_32 (0x12345678) != 0x78563412)
35 {
36 puts ("bswap_32 (constant) flunked");
37 result = 1;
38 }
39 if (bswap_64 (0x1234567890abcdefULL) != 0xefcdab9078563412ULL)
40 {
41 puts ("bswap_64 (constant) flunked");
42 result = 1;
43 }
44
45 /* Test the functions with non-constant arguments. */
46 if (bswap_16 (wash (0x1234)) != 0x3412)
47 {
48 puts ("bswap_16 (non-constant) flunked");
49 result = 1;
50 }
51 if (bswap_32 (wash (0x12345678)) != 0x78563412)
52 {
53 puts ("bswap_32 (non-constant) flunked");
54 result = 1;
55 }
56 if (bswap_64 (wash (0x1234567890abcdefULL)) != 0xefcdab9078563412ULL)
57 {
58 puts ("bswap_64 (non-constant) flunked");
59 result = 1;
60 }
61
62 return result;
63 }
64
65
66 unsigned long long int
wash(unsigned long long int a)67 wash (unsigned long long int a)
68 {
69 /* Do nothing. This function simply exists to avoid that the compiler
70 regards the argument to the bswap_*() functions as constant. */
71 return a + 0;
72 }
73
74 #include <support/test-driver.c>
75