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Diffstat (limited to 'tests/test-intprops.c')
| -rw-r--r-- | tests/test-intprops.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/tests/test-intprops.c b/tests/test-intprops.c new file mode 100644 index 0000000..06df5a7 --- /dev/null +++ b/tests/test-intprops.c @@ -0,0 +1,275 @@ +/* Test intprops.h. + Copyright (C) 2011-2015 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; +} |