2 * Copyright (C) 2007-2018 Free Software Foundation, Inc.
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>. */
17 /* Written by Ben Pfaff. */
21 #include "count-one-bits.h"
28 #define UINT_BIT (sizeof (unsigned int) * CHAR_BIT)
29 #define ULONG_BIT (sizeof (unsigned long int) * CHAR_BIT)
30 #define ULLONG_BIT (sizeof (unsigned long long int) * CHAR_BIT)
33 # define HALF (1ULL << (sizeof (unsigned long long int) * CHAR_BIT - 1))
34 # define ULLONG_MAX (HALF - 1 + HALF)
38 main (int argc
, char *argv
[])
42 #define TEST_COUNT_ONE_BITS(FUNC, TYPE, BITS, MAX, ONE) \
43 ASSERT (FUNC (0) == 0); \
44 for (i = 0; i < BITS; i++) \
46 ASSERT (FUNC (ONE << i) == 1); \
47 for (j = i + 1; j < BITS; j++) \
48 ASSERT (FUNC ((ONE << i) | (ONE << j)) == 2); \
50 for (i = 0; i < 1000; i++) \
52 TYPE value = rand () ^ (rand () << 31 << 1); \
54 for (j = 0; j < BITS; j++) \
55 count += (value & (ONE << j)) != 0; \
56 ASSERT (count == FUNC (value)); \
58 ASSERT (FUNC (MAX) == BITS);
60 TEST_COUNT_ONE_BITS (count_one_bits
, unsigned int, UINT_BIT
, UINT_MAX
, 1U);
61 TEST_COUNT_ONE_BITS (count_one_bits_l
, unsigned long int,
62 ULONG_BIT
, ULONG_MAX
, 1UL);
63 #ifdef HAVE_UNSIGNED_LONG_LONG_INT
64 TEST_COUNT_ONE_BITS (count_one_bits_ll
,
65 unsigned long long int, ULLONG_BIT
, ULLONG_MAX
, 1ULL);