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
35static int
36do_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

source code of glibc/stdlib/tst-width.c