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/* Test intprops.h.
Copyright (C) 2011-2012 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 <http://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
/* Tell gcc not to warn about the many (X < 0) expressions that
the overflow macros expand to. */
#if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
# pragma GCC diagnostic ignored "-Wtype-limits"
#endif
#include <config.h>
#include "intprops.h"
#include "verify.h"
#include <stdbool.h>
#include <inttypes.h>
#include "macros.h"
/* VERIFY (X) uses a static assertion for compilers that are known to work,
and falls back on a dynamic assertion for other compilers.
These tests should be checkable via 'verify' rather than 'ASSERT', but
using 'verify' would run into a bug with HP-UX 11.23 cc; see
<http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00401.html>. */
#if __GNUC__ || __SUNPRO_C
# define VERIFY(x) do { verify (x); } while (0)
#else
# define VERIFY(x) ASSERT (x)
#endif
int
main (void)
{
/* Use VERIFY for tests that must be integer constant expressions,
ASSERT otherwise. */
/* TYPE_IS_INTEGER. */
ASSERT (TYPE_IS_INTEGER (bool));
ASSERT (TYPE_IS_INTEGER (char));
ASSERT (TYPE_IS_INTEGER (signed char));
ASSERT (TYPE_IS_INTEGER (unsigned char));
ASSERT (TYPE_IS_INTEGER (short int));
ASSERT (TYPE_IS_INTEGER (unsigned short int));
ASSERT (TYPE_IS_INTEGER (int));
ASSERT (TYPE_IS_INTEGER (unsigned int));
ASSERT (TYPE_IS_INTEGER (long int));
ASSERT (TYPE_IS_INTEGER (unsigned long int));
ASSERT (TYPE_IS_INTEGER (intmax_t));
ASSERT (TYPE_IS_INTEGER (uintmax_t));
ASSERT (! TYPE_IS_INTEGER (float));
ASSERT (! TYPE_IS_INTEGER (double));
ASSERT (! TYPE_IS_INTEGER (long double));
/* TYPE_SIGNED. */
/* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
VERIFY (TYPE_SIGNED (signed char));
VERIFY (! TYPE_SIGNED (unsigned char));
VERIFY (TYPE_SIGNED (short int));
VERIFY (! TYPE_SIGNED (unsigned short int));
VERIFY (TYPE_SIGNED (int));
VERIFY (! TYPE_SIGNED (unsigned int));
VERIFY (TYPE_SIGNED (long int));
VERIFY (! TYPE_SIGNED (unsigned long int));
VERIFY (TYPE_SIGNED (intmax_t));
VERIFY (! TYPE_SIGNED (uintmax_t));
ASSERT (TYPE_SIGNED (float));
ASSERT (TYPE_SIGNED (double));
ASSERT (TYPE_SIGNED (long double));
/* Integer representation. */
VERIFY (INT_MIN + INT_MAX < 0
? (TYPE_TWOS_COMPLEMENT (int)
&& ! TYPE_ONES_COMPLEMENT (int) && ! TYPE_SIGNED_MAGNITUDE (int))
: (! TYPE_TWOS_COMPLEMENT (int)
&& (TYPE_ONES_COMPLEMENT (int) || TYPE_SIGNED_MAGNITUDE (int))));
/* TYPE_MINIMUM, TYPE_MAXIMUM. */
VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
VERIFY (TYPE_MINIMUM (unsigned char) == 0);
VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
VERIFY (TYPE_MINIMUM (int) == INT_MIN);
VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
VERIFY (TYPE_MINIMUM (unsigned int) == 0);
VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
/* INT_BITS_STRLEN_BOUND. */
VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
/* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND. */
#ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX. */
VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
#endif
#ifdef INT64_MAX
VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
#endif
/* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
INT_<op>_OVERFLOW tests, so define a single macro to do both. */
#define CHECK_BINOP(op, a, b, min, max, overflow) \
(INT_##op##_RANGE_OVERFLOW (a, b, min, max) == (overflow) \
&& INT_##op##_OVERFLOW (a, b) == (overflow))
#define CHECK_UNOP(op, a, min, max, overflow) \
(INT_##op##_RANGE_OVERFLOW (a, min, max) == (overflow) \
&& INT_##op##_OVERFLOW (a) == (overflow))
/* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW. */
VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
VERIFY (CHECK_BINOP (ADD, INT_MAX, 1, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (ADD, INT_MAX, -1, INT_MIN, INT_MAX, false));
VERIFY (CHECK_BINOP (ADD, INT_MIN, 1, INT_MIN, INT_MAX, false));
VERIFY (CHECK_BINOP (ADD, INT_MIN, -1, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (ADD, UINT_MAX, 1u, 0u, UINT_MAX, true));
VERIFY (CHECK_BINOP (ADD, 0u, 1u, 0u, UINT_MAX, false));
VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, 1, INT_MIN, INT_MAX, false));
VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, -1, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, 1, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, -1, INT_MIN, INT_MAX, false));
VERIFY (CHECK_BINOP (SUBTRACT, UINT_MAX, 1u, 0u, UINT_MAX, false));
VERIFY (CHECK_BINOP (SUBTRACT, 0u, 1u, 0u, UINT_MAX, true));
VERIFY (CHECK_UNOP (NEGATE, INT_MIN, INT_MIN, INT_MAX,
TYPE_TWOS_COMPLEMENT (int)));
VERIFY (CHECK_UNOP (NEGATE, 0, INT_MIN, INT_MAX, false));
VERIFY (CHECK_UNOP (NEGATE, INT_MAX, INT_MIN, INT_MAX, false));
VERIFY (CHECK_UNOP (NEGATE, 0u, 0u, UINT_MAX, false));
VERIFY (CHECK_UNOP (NEGATE, 1u, 0u, UINT_MAX, true));
VERIFY (CHECK_UNOP (NEGATE, UINT_MAX, 0u, UINT_MAX, true));
VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MAX, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MIN, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MAX, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MIN, INT_MIN, INT_MAX, true));
VERIFY (CHECK_BINOP (MULTIPLY, -1, INT_MIN, INT_MIN, INT_MAX,
INT_NEGATE_OVERFLOW (INT_MIN)));
VERIFY (CHECK_BINOP (MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
LONG_MIN, LONG_MIN, false));
VERIFY (CHECK_BINOP (DIVIDE, INT_MIN, -1, INT_MIN, INT_MAX,
INT_NEGATE_OVERFLOW (INT_MIN)));
VERIFY (CHECK_BINOP (DIVIDE, INT_MAX, 1, INT_MIN, INT_MAX, false));
VERIFY (CHECK_BINOP (DIVIDE, (unsigned int) INT_MIN,
-1u, 0u, UINT_MAX, false));
VERIFY (CHECK_BINOP (REMAINDER, INT_MIN, -1, INT_MIN, INT_MAX,
INT_NEGATE_OVERFLOW (INT_MIN)));
VERIFY (CHECK_BINOP (REMAINDER, INT_MAX, 1, INT_MIN, INT_MAX, false));
VERIFY (CHECK_BINOP (REMAINDER, (unsigned int) INT_MIN,
-1u, 0u, UINT_MAX, false));
VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX, 1, 0u, UINT_MAX, true));
VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2 + 1, 1, 0u, UINT_MAX, true));
VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2, 1, 0u, UINT_MAX, false));
/* INT_<op>_OVERFLOW with mixed types. */
#define CHECK_SUM(a, b, overflow) \
VERIFY (INT_ADD_OVERFLOW (a, b) == (overflow)); \
VERIFY (INT_ADD_OVERFLOW (b, a) == (overflow))
CHECK_SUM (-1, LONG_MIN, true);
CHECK_SUM (-1, UINT_MAX, false);
CHECK_SUM (-1L, INT_MIN, INT_MIN == LONG_MIN);
CHECK_SUM (0u, -1, true);
CHECK_SUM (0u, 0, false);
CHECK_SUM (0u, 1, false);
CHECK_SUM (1, LONG_MAX, true);
CHECK_SUM (1, UINT_MAX, true);
CHECK_SUM (1L, INT_MAX, INT_MAX == LONG_MAX);
CHECK_SUM (1u, INT_MAX, INT_MAX == UINT_MAX);
CHECK_SUM (1u, INT_MIN, true);
VERIFY (! INT_SUBTRACT_OVERFLOW (INT_MAX, 1u));
VERIFY (! INT_SUBTRACT_OVERFLOW (UINT_MAX, 1));
VERIFY (! INT_SUBTRACT_OVERFLOW (0u, -1));
VERIFY (INT_SUBTRACT_OVERFLOW (UINT_MAX, -1));
VERIFY (INT_SUBTRACT_OVERFLOW (INT_MIN, 1u));
VERIFY (INT_SUBTRACT_OVERFLOW (-1, 0u));
#define CHECK_PRODUCT(a, b, overflow) \
VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (overflow)); \
VERIFY (INT_MULTIPLY_OVERFLOW (b, a) == (overflow))
CHECK_PRODUCT (-1, 1u, true);
CHECK_PRODUCT (-1, INT_MIN, INT_NEGATE_OVERFLOW (INT_MIN));
CHECK_PRODUCT (-1, UINT_MAX, true);
CHECK_PRODUCT (-12345, LONG_MAX / -12345 - 1, true);
CHECK_PRODUCT (-12345, LONG_MAX / -12345, false);
CHECK_PRODUCT (0, -1, false);
CHECK_PRODUCT (0, 0, false);
CHECK_PRODUCT (0, 0u, false);
CHECK_PRODUCT (0, 1, false);
CHECK_PRODUCT (0, INT_MAX, false);
CHECK_PRODUCT (0, INT_MIN, false);
CHECK_PRODUCT (0, UINT_MAX, false);
CHECK_PRODUCT (0u, -1, false);
CHECK_PRODUCT (0u, 0, false);
CHECK_PRODUCT (0u, 0u, false);
CHECK_PRODUCT (0u, 1, false);
CHECK_PRODUCT (0u, INT_MAX, false);
CHECK_PRODUCT (0u, INT_MIN, false);
CHECK_PRODUCT (0u, UINT_MAX, false);
CHECK_PRODUCT (1, INT_MAX, false);
CHECK_PRODUCT (1, INT_MIN, false);
CHECK_PRODUCT (1, UINT_MAX, false);
CHECK_PRODUCT (1u, INT_MIN, true);
CHECK_PRODUCT (1u, INT_MAX, UINT_MAX < INT_MAX);
CHECK_PRODUCT (INT_MAX, UINT_MAX, true);
CHECK_PRODUCT (INT_MAX, ULONG_MAX, true);
CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, true);
CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN, false);
CHECK_PRODUCT (INT_MIN, UINT_MAX, true);
CHECK_PRODUCT (INT_MIN, ULONG_MAX, true);
VERIFY (INT_DIVIDE_OVERFLOW (INT_MIN, -1L)
== (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
VERIFY (! INT_DIVIDE_OVERFLOW (INT_MIN, UINT_MAX));
VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINTMAX_MAX));
VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINT_MAX));
VERIFY (INT_DIVIDE_OVERFLOW (-11, 10u));
VERIFY (INT_DIVIDE_OVERFLOW (-10, 10u));
VERIFY (! INT_DIVIDE_OVERFLOW (-9, 10u));
VERIFY (INT_DIVIDE_OVERFLOW (11u, -10));
VERIFY (INT_DIVIDE_OVERFLOW (10u, -10));
VERIFY (! INT_DIVIDE_OVERFLOW (9u, -10));
VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, -1L)
== (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
VERIFY (INT_REMAINDER_OVERFLOW (-1, UINT_MAX));
VERIFY (INT_REMAINDER_OVERFLOW ((intmax_t) -1, UINTMAX_MAX));
VERIFY (INT_REMAINDER_OVERFLOW (INTMAX_MIN, UINT_MAX)
== (INTMAX_MAX < UINT_MAX
&& - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, ULONG_MAX)
== (INT_MIN % ULONG_MAX != 1));
VERIFY (! INT_REMAINDER_OVERFLOW (1u, -1));
VERIFY (! INT_REMAINDER_OVERFLOW (37*39u, -39));
VERIFY (INT_REMAINDER_OVERFLOW (37*39u + 1, -39));
VERIFY (INT_REMAINDER_OVERFLOW (37*39u - 1, -39));
VERIFY (! INT_REMAINDER_OVERFLOW (LONG_MAX, -INT_MAX));
return 0;
}
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