| 1 | /* Test intprops.h.
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| 2 | Copyright (C) 2011-2012 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software: you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3 of the License, or
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| 7 | (at your option) any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | /* Written by Paul Eggert. */
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| 18 |
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| 19 | /* Tell gcc not to warn about the many (X < 0) expressions that
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| 20 | the overflow macros expand to. */
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| 21 | #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
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| 22 | # pragma GCC diagnostic ignored "-Wtype-limits"
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| 23 | #endif
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| 24 |
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| 25 | #include <config.h>
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| 26 |
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| 27 | #include "intprops.h"
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| 28 | #include "verify.h"
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| 29 |
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| 30 | #include <stdbool.h>
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| 31 | #include <inttypes.h>
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| 32 |
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| 33 | #include "macros.h"
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| 34 |
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| 35 | /* VERIFY (X) uses a static assertion for compilers that are known to work,
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| 36 | and falls back on a dynamic assertion for other compilers.
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| 37 | These tests should be checkable via 'verify' rather than 'ASSERT', but
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| 38 | using 'verify' would run into a bug with HP-UX 11.23 cc; see
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| 39 | <http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00401.html>. */
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| 40 | #if __GNUC__ || __SUNPRO_C
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| 41 | # define VERIFY(x) do { verify (x); } while (0)
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| 42 | #else
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| 43 | # define VERIFY(x) ASSERT (x)
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| 44 | #endif
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| 45 |
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| 46 | int
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| 47 | main (void)
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| 48 | {
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| 49 | /* Use VERIFY for tests that must be integer constant expressions,
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| 50 | ASSERT otherwise. */
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| 51 |
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| 52 | /* TYPE_IS_INTEGER. */
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| 53 | ASSERT (TYPE_IS_INTEGER (bool));
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| 54 | ASSERT (TYPE_IS_INTEGER (char));
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| 55 | ASSERT (TYPE_IS_INTEGER (signed char));
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| 56 | ASSERT (TYPE_IS_INTEGER (unsigned char));
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| 57 | ASSERT (TYPE_IS_INTEGER (short int));
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| 58 | ASSERT (TYPE_IS_INTEGER (unsigned short int));
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| 59 | ASSERT (TYPE_IS_INTEGER (int));
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| 60 | ASSERT (TYPE_IS_INTEGER (unsigned int));
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| 61 | ASSERT (TYPE_IS_INTEGER (long int));
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| 62 | ASSERT (TYPE_IS_INTEGER (unsigned long int));
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| 63 | ASSERT (TYPE_IS_INTEGER (intmax_t));
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| 64 | ASSERT (TYPE_IS_INTEGER (uintmax_t));
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| 65 | ASSERT (! TYPE_IS_INTEGER (float));
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| 66 | ASSERT (! TYPE_IS_INTEGER (double));
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| 67 | ASSERT (! TYPE_IS_INTEGER (long double));
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| 68 |
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| 69 | /* TYPE_SIGNED. */
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| 70 | /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
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| 71 | VERIFY (TYPE_SIGNED (signed char));
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| 72 | VERIFY (! TYPE_SIGNED (unsigned char));
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| 73 | VERIFY (TYPE_SIGNED (short int));
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| 74 | VERIFY (! TYPE_SIGNED (unsigned short int));
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| 75 | VERIFY (TYPE_SIGNED (int));
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| 76 | VERIFY (! TYPE_SIGNED (unsigned int));
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| 77 | VERIFY (TYPE_SIGNED (long int));
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| 78 | VERIFY (! TYPE_SIGNED (unsigned long int));
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| 79 | VERIFY (TYPE_SIGNED (intmax_t));
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| 80 | VERIFY (! TYPE_SIGNED (uintmax_t));
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| 81 | ASSERT (TYPE_SIGNED (float));
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| 82 | ASSERT (TYPE_SIGNED (double));
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| 83 | ASSERT (TYPE_SIGNED (long double));
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| 84 |
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| 85 | /* Integer representation. */
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| 86 | VERIFY (INT_MIN + INT_MAX < 0
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| 87 | ? (TYPE_TWOS_COMPLEMENT (int)
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| 88 | && ! TYPE_ONES_COMPLEMENT (int) && ! TYPE_SIGNED_MAGNITUDE (int))
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| 89 | : (! TYPE_TWOS_COMPLEMENT (int)
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| 90 | && (TYPE_ONES_COMPLEMENT (int) || TYPE_SIGNED_MAGNITUDE (int))));
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| 91 |
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| 92 | /* TYPE_MINIMUM, TYPE_MAXIMUM. */
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| 93 | VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
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| 94 | VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
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| 95 | VERIFY (TYPE_MINIMUM (unsigned char) == 0);
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| 96 | VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
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| 97 | VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
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| 98 | VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
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| 99 | VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
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| 100 | VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
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| 101 | VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
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| 102 | VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
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| 103 | VERIFY (TYPE_MINIMUM (int) == INT_MIN);
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| 104 | VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
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| 105 | VERIFY (TYPE_MINIMUM (unsigned int) == 0);
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| 106 | VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
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| 107 | VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
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| 108 | VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
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| 109 | VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
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| 110 | VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
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| 111 | VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
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| 112 | VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
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| 113 | VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
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| 114 | VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
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| 115 |
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| 116 | /* INT_BITS_STRLEN_BOUND. */
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| 117 | VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
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| 118 | VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
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| 119 |
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| 120 | /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND. */
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| 121 | #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX. */
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| 122 | VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
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| 123 | VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
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| 124 | #endif
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| 125 | #ifdef INT64_MAX
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| 126 | VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
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| 127 | VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
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| 128 | #endif
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| 129 |
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| 130 | /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
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| 131 | INT_<op>_OVERFLOW tests, so define a single macro to do both. */
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| 132 | #define CHECK_BINOP(op, a, b, min, max, overflow) \
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| 133 | (INT_##op##_RANGE_OVERFLOW (a, b, min, max) == (overflow) \
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| 134 | && INT_##op##_OVERFLOW (a, b) == (overflow))
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| 135 | #define CHECK_UNOP(op, a, min, max, overflow) \
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| 136 | (INT_##op##_RANGE_OVERFLOW (a, min, max) == (overflow) \
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| 137 | && INT_##op##_OVERFLOW (a) == (overflow))
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| 138 |
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| 139 | /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW. */
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| 140 | VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
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| 141 | VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
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| 142 | VERIFY (CHECK_BINOP (ADD, INT_MAX, 1, INT_MIN, INT_MAX, true));
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| 143 | VERIFY (CHECK_BINOP (ADD, INT_MAX, -1, INT_MIN, INT_MAX, false));
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| 144 | VERIFY (CHECK_BINOP (ADD, INT_MIN, 1, INT_MIN, INT_MAX, false));
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| 145 | VERIFY (CHECK_BINOP (ADD, INT_MIN, -1, INT_MIN, INT_MAX, true));
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| 146 | VERIFY (CHECK_BINOP (ADD, UINT_MAX, 1u, 0u, UINT_MAX, true));
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| 147 | VERIFY (CHECK_BINOP (ADD, 0u, 1u, 0u, UINT_MAX, false));
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| 148 |
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| 149 | VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, 1, INT_MIN, INT_MAX, false));
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| 150 | VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, -1, INT_MIN, INT_MAX, true));
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| 151 | VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, 1, INT_MIN, INT_MAX, true));
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| 152 | VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, -1, INT_MIN, INT_MAX, false));
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| 153 | VERIFY (CHECK_BINOP (SUBTRACT, UINT_MAX, 1u, 0u, UINT_MAX, false));
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| 154 | VERIFY (CHECK_BINOP (SUBTRACT, 0u, 1u, 0u, UINT_MAX, true));
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| 155 |
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| 156 | VERIFY (CHECK_UNOP (NEGATE, INT_MIN, INT_MIN, INT_MAX,
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| 157 | TYPE_TWOS_COMPLEMENT (int)));
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| 158 | VERIFY (CHECK_UNOP (NEGATE, 0, INT_MIN, INT_MAX, false));
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| 159 | VERIFY (CHECK_UNOP (NEGATE, INT_MAX, INT_MIN, INT_MAX, false));
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| 160 | VERIFY (CHECK_UNOP (NEGATE, 0u, 0u, UINT_MAX, false));
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| 161 | VERIFY (CHECK_UNOP (NEGATE, 1u, 0u, UINT_MAX, true));
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| 162 | VERIFY (CHECK_UNOP (NEGATE, UINT_MAX, 0u, UINT_MAX, true));
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| 163 |
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| 164 | VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MAX, INT_MIN, INT_MAX, true));
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| 165 | VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MIN, INT_MIN, INT_MAX, true));
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| 166 | VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MAX, INT_MIN, INT_MAX, true));
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| 167 | VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MIN, INT_MIN, INT_MAX, true));
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| 168 | VERIFY (CHECK_BINOP (MULTIPLY, -1, INT_MIN, INT_MIN, INT_MAX,
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| 169 | INT_NEGATE_OVERFLOW (INT_MIN)));
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| 170 | VERIFY (CHECK_BINOP (MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
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| 171 | LONG_MIN, LONG_MIN, false));
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| 172 |
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| 173 | VERIFY (CHECK_BINOP (DIVIDE, INT_MIN, -1, INT_MIN, INT_MAX,
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| 174 | INT_NEGATE_OVERFLOW (INT_MIN)));
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| 175 | VERIFY (CHECK_BINOP (DIVIDE, INT_MAX, 1, INT_MIN, INT_MAX, false));
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| 176 | VERIFY (CHECK_BINOP (DIVIDE, (unsigned int) INT_MIN,
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| 177 | -1u, 0u, UINT_MAX, false));
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| 178 |
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| 179 | VERIFY (CHECK_BINOP (REMAINDER, INT_MIN, -1, INT_MIN, INT_MAX,
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| 180 | INT_NEGATE_OVERFLOW (INT_MIN)));
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| 181 | VERIFY (CHECK_BINOP (REMAINDER, INT_MAX, 1, INT_MIN, INT_MAX, false));
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| 182 | VERIFY (CHECK_BINOP (REMAINDER, (unsigned int) INT_MIN,
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| 183 | -1u, 0u, UINT_MAX, false));
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| 184 |
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| 185 | VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX, 1, 0u, UINT_MAX, true));
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| 186 | VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2 + 1, 1, 0u, UINT_MAX, true));
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| 187 | VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2, 1, 0u, UINT_MAX, false));
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| 188 |
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| 189 | /* INT_<op>_OVERFLOW with mixed types. */
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| 190 | #define CHECK_SUM(a, b, overflow) \
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| 191 | VERIFY (INT_ADD_OVERFLOW (a, b) == (overflow)); \
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| 192 | VERIFY (INT_ADD_OVERFLOW (b, a) == (overflow))
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| 193 | CHECK_SUM (-1, LONG_MIN, true);
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| 194 | CHECK_SUM (-1, UINT_MAX, false);
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| 195 | CHECK_SUM (-1L, INT_MIN, INT_MIN == LONG_MIN);
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| 196 | CHECK_SUM (0u, -1, true);
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| 197 | CHECK_SUM (0u, 0, false);
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| 198 | CHECK_SUM (0u, 1, false);
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| 199 | CHECK_SUM (1, LONG_MAX, true);
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| 200 | CHECK_SUM (1, UINT_MAX, true);
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| 201 | CHECK_SUM (1L, INT_MAX, INT_MAX == LONG_MAX);
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| 202 | CHECK_SUM (1u, INT_MAX, INT_MAX == UINT_MAX);
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| 203 | CHECK_SUM (1u, INT_MIN, true);
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| 204 |
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| 205 | VERIFY (! INT_SUBTRACT_OVERFLOW (INT_MAX, 1u));
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| 206 | VERIFY (! INT_SUBTRACT_OVERFLOW (UINT_MAX, 1));
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| 207 | VERIFY (! INT_SUBTRACT_OVERFLOW (0u, -1));
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| 208 | VERIFY (INT_SUBTRACT_OVERFLOW (UINT_MAX, -1));
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| 209 | VERIFY (INT_SUBTRACT_OVERFLOW (INT_MIN, 1u));
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| 210 | VERIFY (INT_SUBTRACT_OVERFLOW (-1, 0u));
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| 211 |
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| 212 | #define CHECK_PRODUCT(a, b, overflow) \
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| 213 | VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (overflow)); \
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| 214 | VERIFY (INT_MULTIPLY_OVERFLOW (b, a) == (overflow))
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| 215 |
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| 216 | CHECK_PRODUCT (-1, 1u, true);
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| 217 | CHECK_PRODUCT (-1, INT_MIN, INT_NEGATE_OVERFLOW (INT_MIN));
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| 218 | CHECK_PRODUCT (-1, UINT_MAX, true);
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| 219 | CHECK_PRODUCT (-12345, LONG_MAX / -12345 - 1, true);
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| 220 | CHECK_PRODUCT (-12345, LONG_MAX / -12345, false);
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| 221 | CHECK_PRODUCT (0, -1, false);
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| 222 | CHECK_PRODUCT (0, 0, false);
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| 223 | CHECK_PRODUCT (0, 0u, false);
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| 224 | CHECK_PRODUCT (0, 1, false);
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| 225 | CHECK_PRODUCT (0, INT_MAX, false);
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| 226 | CHECK_PRODUCT (0, INT_MIN, false);
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| 227 | CHECK_PRODUCT (0, UINT_MAX, false);
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| 228 | CHECK_PRODUCT (0u, -1, false);
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| 229 | CHECK_PRODUCT (0u, 0, false);
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| 230 | CHECK_PRODUCT (0u, 0u, false);
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| 231 | CHECK_PRODUCT (0u, 1, false);
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| 232 | CHECK_PRODUCT (0u, INT_MAX, false);
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| 233 | CHECK_PRODUCT (0u, INT_MIN, false);
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| 234 | CHECK_PRODUCT (0u, UINT_MAX, false);
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| 235 | CHECK_PRODUCT (1, INT_MAX, false);
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| 236 | CHECK_PRODUCT (1, INT_MIN, false);
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| 237 | CHECK_PRODUCT (1, UINT_MAX, false);
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| 238 | CHECK_PRODUCT (1u, INT_MIN, true);
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| 239 | CHECK_PRODUCT (1u, INT_MAX, UINT_MAX < INT_MAX);
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| 240 | CHECK_PRODUCT (INT_MAX, UINT_MAX, true);
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| 241 | CHECK_PRODUCT (INT_MAX, ULONG_MAX, true);
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| 242 | CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, true);
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| 243 | CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN, false);
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| 244 | CHECK_PRODUCT (INT_MIN, UINT_MAX, true);
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| 245 | CHECK_PRODUCT (INT_MIN, ULONG_MAX, true);
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| 246 |
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| 247 | VERIFY (INT_DIVIDE_OVERFLOW (INT_MIN, -1L)
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| 248 | == (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
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| 249 | VERIFY (! INT_DIVIDE_OVERFLOW (INT_MIN, UINT_MAX));
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| 250 | VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINTMAX_MAX));
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| 251 | VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINT_MAX));
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| 252 | VERIFY (INT_DIVIDE_OVERFLOW (-11, 10u));
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| 253 | VERIFY (INT_DIVIDE_OVERFLOW (-10, 10u));
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| 254 | VERIFY (! INT_DIVIDE_OVERFLOW (-9, 10u));
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| 255 | VERIFY (INT_DIVIDE_OVERFLOW (11u, -10));
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| 256 | VERIFY (INT_DIVIDE_OVERFLOW (10u, -10));
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| 257 | VERIFY (! INT_DIVIDE_OVERFLOW (9u, -10));
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| 258 |
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| 259 | VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, -1L)
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| 260 | == (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
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| 261 | VERIFY (INT_REMAINDER_OVERFLOW (-1, UINT_MAX));
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| 262 | VERIFY (INT_REMAINDER_OVERFLOW ((intmax_t) -1, UINTMAX_MAX));
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| 263 | VERIFY (INT_REMAINDER_OVERFLOW (INTMAX_MIN, UINT_MAX)
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| 264 | == (INTMAX_MAX < UINT_MAX
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| 265 | && - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
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| 266 | VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, ULONG_MAX)
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| 267 | == (INT_MIN % ULONG_MAX != 1));
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| 268 | VERIFY (! INT_REMAINDER_OVERFLOW (1u, -1));
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| 269 | VERIFY (! INT_REMAINDER_OVERFLOW (37*39u, -39));
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| 270 | VERIFY (INT_REMAINDER_OVERFLOW (37*39u + 1, -39));
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| 271 | VERIFY (INT_REMAINDER_OVERFLOW (37*39u - 1, -39));
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| 272 | VERIFY (! INT_REMAINDER_OVERFLOW (LONG_MAX, -INT_MAX));
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| 273 |
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| 274 | return 0;
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| 275 | }
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