118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
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/* Test of <limits.h> substitute.
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Copyright 2016-2021 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 Paul Eggert. */
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#include <config.h>
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#include <limits.h>
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#include "verify.h"
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#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
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# pragma GCC diagnostic ignored "-Woverlength-strings"
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#endif
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#define verify_width(width, min, max) \
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verify ((max) >> ((width) - 1 - ((min) < 0)) == 1)
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/* Macros borrowed from intprops.h. */
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#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
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#define TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
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#define TYPE_MINIMUM(t) ((t) ~ TYPE_MAXIMUM (t))
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#define TYPE_MAXIMUM(t) \
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((t) (! TYPE_SIGNED (t) \
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? (t) -1 \
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: ((((t) 1 << (TYPE_WIDTH (t) - 2)) - 1) * 2 + 1)))
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/* Type width macros. */
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int type_bits[] =
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{
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CHAR_BIT,
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WORD_BIT,
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LONG_BIT
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};
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verify_width (CHAR_BIT, CHAR_MIN, CHAR_MAX);
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verify_width (WORD_BIT, INT_MIN, INT_MAX);
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verify_width (LONG_BIT, LONG_MIN, LONG_MAX);
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/* Numerical limit macros. */
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char limits1[] = { CHAR_MIN, CHAR_MAX };
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verify (TYPE_MINIMUM (char) == CHAR_MIN);
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verify (TYPE_MAXIMUM (char) == CHAR_MAX);
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signed char limits2[] = { SCHAR_MIN, SCHAR_MAX };
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verify (TYPE_MINIMUM (signed char) == SCHAR_MIN);
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verify (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
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unsigned char limits3[] = { UCHAR_MAX };
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verify (TYPE_MINIMUM (unsigned char) == 0);
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verify (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
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short limits4[] = { SHRT_MIN, SHRT_MAX };
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verify (TYPE_MINIMUM (short int) == SHRT_MIN);
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verify (TYPE_MAXIMUM (short int) == SHRT_MAX);
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unsigned short limits5[] = { USHRT_MAX };
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verify (TYPE_MINIMUM (unsigned short int) == 0);
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verify (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
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int limits6[] = { INT_MIN, INT_MAX };
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verify (TYPE_MINIMUM (int) == INT_MIN);
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verify (TYPE_MAXIMUM (int) == INT_MAX);
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unsigned int limits7[] = { UINT_MAX };
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verify (TYPE_MINIMUM (unsigned int) == 0);
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verify (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
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long limits8[] = { LONG_MIN, LONG_MAX };
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verify (TYPE_MINIMUM (long int) == LONG_MIN);
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verify (TYPE_MAXIMUM (long int) == LONG_MAX);
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unsigned long limits9[] = { ULONG_MAX };
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verify (TYPE_MINIMUM (unsigned long int) == 0);
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verify (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
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long long limits10[] = { LLONG_MIN, LLONG_MAX };
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verify (TYPE_MINIMUM (long long int) == LLONG_MIN);
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verify (TYPE_MAXIMUM (long long int) == LLONG_MAX);
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unsigned long long limits11[] = { ULLONG_MAX };
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verify (TYPE_MINIMUM (unsigned long long int) == 0);
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verify (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX);
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/* Macros specified by ISO/IEC TS 18661-1:2014. */
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verify_width (CHAR_WIDTH, CHAR_MIN, CHAR_MAX);
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verify_width (SCHAR_WIDTH, SCHAR_MIN, SCHAR_MAX);
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verify_width (UCHAR_WIDTH, 0, UCHAR_MAX);
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verify_width (SHRT_WIDTH, SHRT_MIN, SHRT_MAX);
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verify_width (USHRT_WIDTH, 0, USHRT_MAX);
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verify_width (INT_WIDTH, INT_MIN, INT_MAX);
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verify_width (UINT_WIDTH, 0, UINT_MAX);
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verify_width (LONG_WIDTH, LONG_MIN, LONG_MAX);
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verify_width (ULONG_WIDTH, 0, ULONG_MAX);
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verify_width (LLONG_WIDTH, LLONG_MIN, LLONG_MAX);
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verify_width (ULLONG_WIDTH, 0, ULLONG_MAX);
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int
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main (void)
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{
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return 0;
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}
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