| /* Test of <limits.h> substitute. |
| Copyright 2016-2021 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Paul Eggert. */ |
| |
| #include <config.h> |
| |
| #include <limits.h> |
| |
| #include "verify.h" |
| |
| #if 4 < __GNUC__ + (3 <= __GNUC_MINOR__) |
| # pragma GCC diagnostic ignored "-Woverlength-strings" |
| #endif |
| |
| #define verify_width(width, min, max) \ |
| verify ((max) >> ((width) - 1 - ((min) < 0)) == 1) |
| |
| /* Macros borrowed from intprops.h. */ |
| #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) |
| #define TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT) |
| #define TYPE_MINIMUM(t) ((t) ~ TYPE_MAXIMUM (t)) |
| #define TYPE_MAXIMUM(t) \ |
| ((t) (! TYPE_SIGNED (t) \ |
| ? (t) -1 \ |
| : ((((t) 1 << (TYPE_WIDTH (t) - 2)) - 1) * 2 + 1))) |
| |
| /* Type width macros. */ |
| |
| int type_bits[] = |
| { |
| CHAR_BIT, |
| WORD_BIT, |
| LONG_BIT |
| }; |
| verify_width (CHAR_BIT, CHAR_MIN, CHAR_MAX); |
| verify_width (WORD_BIT, INT_MIN, INT_MAX); |
| verify_width (LONG_BIT, LONG_MIN, LONG_MAX); |
| |
| /* Numerical limit macros. */ |
| |
| char limits1[] = { CHAR_MIN, CHAR_MAX }; |
| verify (TYPE_MINIMUM (char) == CHAR_MIN); |
| verify (TYPE_MAXIMUM (char) == CHAR_MAX); |
| |
| signed char limits2[] = { SCHAR_MIN, SCHAR_MAX }; |
| verify (TYPE_MINIMUM (signed char) == SCHAR_MIN); |
| verify (TYPE_MAXIMUM (signed char) == SCHAR_MAX); |
| |
| unsigned char limits3[] = { UCHAR_MAX }; |
| verify (TYPE_MINIMUM (unsigned char) == 0); |
| verify (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX); |
| |
| short limits4[] = { SHRT_MIN, SHRT_MAX }; |
| verify (TYPE_MINIMUM (short int) == SHRT_MIN); |
| verify (TYPE_MAXIMUM (short int) == SHRT_MAX); |
| |
| unsigned short limits5[] = { USHRT_MAX }; |
| verify (TYPE_MINIMUM (unsigned short int) == 0); |
| verify (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX); |
| |
| int limits6[] = { INT_MIN, INT_MAX }; |
| verify (TYPE_MINIMUM (int) == INT_MIN); |
| verify (TYPE_MAXIMUM (int) == INT_MAX); |
| |
| unsigned int limits7[] = { UINT_MAX }; |
| verify (TYPE_MINIMUM (unsigned int) == 0); |
| verify (TYPE_MAXIMUM (unsigned int) == UINT_MAX); |
| |
| long limits8[] = { LONG_MIN, LONG_MAX }; |
| verify (TYPE_MINIMUM (long int) == LONG_MIN); |
| verify (TYPE_MAXIMUM (long int) == LONG_MAX); |
| |
| unsigned long limits9[] = { ULONG_MAX }; |
| verify (TYPE_MINIMUM (unsigned long int) == 0); |
| verify (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX); |
| |
| long long limits10[] = { LLONG_MIN, LLONG_MAX }; |
| verify (TYPE_MINIMUM (long long int) == LLONG_MIN); |
| verify (TYPE_MAXIMUM (long long int) == LLONG_MAX); |
| |
| unsigned long long limits11[] = { ULLONG_MAX }; |
| verify (TYPE_MINIMUM (unsigned long long int) == 0); |
| verify (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX); |
| |
| /* Macros specified by ISO/IEC TS 18661-1:2014. */ |
| |
| verify_width (CHAR_WIDTH, CHAR_MIN, CHAR_MAX); |
| verify_width (SCHAR_WIDTH, SCHAR_MIN, SCHAR_MAX); |
| verify_width (UCHAR_WIDTH, 0, UCHAR_MAX); |
| verify_width (SHRT_WIDTH, SHRT_MIN, SHRT_MAX); |
| verify_width (USHRT_WIDTH, 0, USHRT_MAX); |
| verify_width (INT_WIDTH, INT_MIN, INT_MAX); |
| verify_width (UINT_WIDTH, 0, UINT_MAX); |
| verify_width (LONG_WIDTH, LONG_MIN, LONG_MAX); |
| verify_width (ULONG_WIDTH, 0, ULONG_MAX); |
| verify_width (LLONG_WIDTH, LLONG_MIN, LLONG_MAX); |
| verify_width (ULLONG_WIDTH, 0, ULLONG_MAX); |
| |
| int |
| main (void) |
| { |
| return 0; |
| } |