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63eb8df8 | 1 | /* Tests of functions to access `dev_t' values. |
dff8da6b | 2 | Copyright (C) 2016-2024 Free Software Foundation, Inc. |
63eb8df8 ZW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
63eb8df8 ZW |
18 | |
19 | #include <sys/types.h> | |
20 | #include <sys/sysmacros.h> | |
21 | #include <stdio.h> | |
22 | #include <inttypes.h> | |
23 | ||
24 | /* Confirm that makedev (major (d), minor (d)) == d. */ | |
25 | static int | |
26 | do_test_split_combine (dev_t d1) | |
27 | { | |
28 | unsigned int maj = major (d1); | |
29 | unsigned int min = minor (d1); | |
30 | dev_t d2 = makedev (maj, min); | |
31 | if (d1 != d2) | |
32 | { | |
33 | printf ("FAIL: %016" PRIx64 " != %016" PRIx64 " (maj %08x min %08x)\n", | |
34 | (uint64_t)d2, (uint64_t)d1, maj, min); | |
35 | return 1; | |
36 | } | |
37 | else | |
38 | return 0; | |
39 | } | |
40 | ||
41 | /* Confirm that major (makedev (maj, min)) == maj and | |
42 | minor (makedev (maj, min)) == min. */ | |
43 | static int | |
44 | do_test_combine_split (unsigned int maj1, unsigned int min1) | |
45 | { | |
46 | dev_t d = makedev (maj1, min1); | |
47 | unsigned int maj2 = major (d); | |
48 | unsigned int min2 = minor (d); | |
49 | if (maj1 != maj2 && min1 != min2) | |
50 | { | |
51 | printf ("FAIL: %08x != %08x, %08x != %08x (dev %016" PRIx64 ")\n", | |
52 | maj2, maj1, min2, min1, (uint64_t)d); | |
53 | return 1; | |
54 | } | |
55 | else if (maj1 != maj2) | |
56 | { | |
57 | printf ("FAIL: %08x != %08x, %08x == %08x (dev %016" PRIx64 ")\n", | |
58 | maj2, maj1, min2, min1, (uint64_t)d); | |
59 | return 1; | |
60 | } | |
61 | else if (min1 != min2) | |
62 | { | |
63 | printf ("FAIL: %08x == %08x, %08x != %08x (dev %016" PRIx64 ")\n", | |
64 | maj2, maj1, min2, min1, (uint64_t)d); | |
65 | return 1; | |
66 | } | |
67 | else | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static int | |
72 | do_test (void) | |
73 | { | |
74 | dev_t d; | |
75 | unsigned int maj, min; | |
76 | int status = 0; | |
77 | ||
78 | /* Test the traditional range (16-bit dev_t, 8-bit each maj/min) | |
79 | exhaustively. */ | |
80 | for (d = 0; d <= 0xFFFF; d++) | |
81 | status |= do_test_split_combine (d); | |
82 | ||
83 | for (maj = 0; maj <= 0xFF; maj++) | |
84 | for (min = 0; min <= 0xFF; min++) | |
85 | status |= do_test_combine_split (maj, min); | |
86 | ||
87 | /* Test glibc's expanded range (64-bit dev_t, 32-bit each maj/min). | |
88 | Exhaustive testing would take much too long, instead we shift a | |
89 | pair of 1-bits over each range. */ | |
90 | { | |
91 | unsigned int a, b; | |
92 | for (a = 0; a <= 63; a++) | |
93 | do_test_split_combine (((dev_t) 0x03) << a); | |
94 | ||
95 | for (a = 0; a < 31; a++) | |
96 | for (b = 0; b <= 31; b++) | |
97 | do_test_combine_split (0x03u << a, 0x03u << b); | |
98 | } | |
99 | ||
100 | return status; | |
101 | } | |
102 | ||
103 | #define TEST_FUNCTION do_test () | |
104 | #include "../test-skeleton.c" |