1 /* Test integer width macros.
2 Copyright (C) 2016-2022 Free Software Foundation, Inc.
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
17 <https://www.gnu.org/licenses/>. */
18
19 #include <limits.h>
20 #include <stdio.h>
21
22 #define CHECK_WIDTH(TYPE, MAX, WIDTH) \
23 do \
24 { \
25 if ((MAX >> ((TYPE) -1 < 0 ? (WIDTH - 2) : (WIDTH - 1))) != 1) \
26 { \
27 puts ("bad width of " #TYPE); \
28 result = 1; \
29 } \
30 else \
31 puts ("width of " #TYPE " OK"); \
32 } \
33 while (0)
34
35 static int
do_test(void)36 do_test (void)
37 {
38 int result = 0;
39 #ifndef CHAR_WIDTH
40 # error "missing CHAR_WIDTH"
41 #endif
42 CHECK_WIDTH (char, CHAR_MAX, CHAR_WIDTH);
43 #ifndef SCHAR_WIDTH
44 # error "missing SCHAR_WIDTH"
45 #endif
46 CHECK_WIDTH (signed char, SCHAR_MAX, SCHAR_WIDTH);
47 #ifndef UCHAR_WIDTH
48 # error "missing UCHAR_WIDTH"
49 #endif
50 CHECK_WIDTH (unsigned char, UCHAR_MAX, UCHAR_WIDTH);
51 #ifndef SHRT_WIDTH
52 # error "missing SHRT_WIDTH"
53 #endif
54 CHECK_WIDTH (signed short, SHRT_MAX, SHRT_WIDTH);
55 #ifndef USHRT_WIDTH
56 # error "missing USHRT_WIDTH"
57 #endif
58 CHECK_WIDTH (unsigned short, USHRT_MAX, USHRT_WIDTH);
59 #ifndef INT_WIDTH
60 # error "missing INT_WIDTH"
61 #endif
62 CHECK_WIDTH (signed int, INT_MAX, INT_WIDTH);
63 #ifndef UINT_WIDTH
64 # error "missing UINT_WIDTH"
65 #endif
66 CHECK_WIDTH (unsigned int, UINT_MAX, UINT_WIDTH);
67 #ifndef LONG_WIDTH
68 # error "missing LONG_WIDTH"
69 #endif
70 CHECK_WIDTH (signed long, LONG_MAX, LONG_WIDTH);
71 #ifndef ULONG_WIDTH
72 # error "missing ULONG_WIDTH"
73 #endif
74 CHECK_WIDTH (unsigned long, ULONG_MAX, ULONG_WIDTH);
75 #ifndef LLONG_WIDTH
76 # error "missing LLONG_WIDTH"
77 #endif
78 CHECK_WIDTH (signed long long, LLONG_MAX, LLONG_WIDTH);
79 #ifndef ULLONG_WIDTH
80 # error "missing ULLONG_WIDTH"
81 #endif
82 CHECK_WIDTH (unsigned long long, ULLONG_MAX, ULLONG_WIDTH);
83 return result;
84 }
85
86 #define TEST_FUNCTION do_test ()
87 #include "../test-skeleton.c"
88