diff options
Diffstat (limited to 'tests/test-limits-h.c')
| -rw-r--r-- | tests/test-limits-h.c | 78 |
1 files changed, 75 insertions, 3 deletions
diff --git a/tests/test-limits-h.c b/tests/test-limits-h.c index 29b5127..b1b1615 100644 --- a/tests/test-limits-h.c +++ b/tests/test-limits-h.c @@ -1,5 +1,5 @@ /* Test of <limits.h> substitute. - Copyright 2016-2018 Free Software Foundation, Inc. + Copyright 2016-2022 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 @@ -26,11 +26,78 @@ # pragma GCC diagnostic ignored "-Woverlength-strings" #endif -/* Macros specified by ISO/IEC TS 18661-1:2014. */ - #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); @@ -43,6 +110,11 @@ verify_width (ULONG_WIDTH, 0, ULONG_MAX); verify_width (LLONG_WIDTH, LLONG_MIN, LLONG_MAX); verify_width (ULLONG_WIDTH, 0, ULLONG_MAX); +/* Macros specified by C2x. */ + +int bool_attrs[] = { BOOL_MAX, BOOL_WIDTH }; +verify (BOOL_MAX == (((1U << (BOOL_WIDTH - 1)) - 1) * 2) + 1); + int main (void) { |