2 * Copyright (C) 2007 Free Software Foundation
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 <http://www.gnu.org/licenses/>. */
17 /* Written by Ben Pfaff. */
21 #include "count-one-bits.h"
27 #define ASSERT(expr) \
32 fprintf (stderr, "%s:%d: assertion \"%s\" failed\n", \
33 __FILE__, __LINE__, #expr); \
39 #define UINT_BIT (sizeof (unsigned int) * CHAR_BIT)
40 #define ULONG_BIT (sizeof (unsigned long int) * CHAR_BIT)
41 #define ULLONG_BIT (sizeof (unsigned long long int) * CHAR_BIT)
44 # define HALF (1ULL << (sizeof (unsigned long long int) * CHAR_BIT - 1))
45 # define ULLONG_MAX (HALF - 1 + HALF)
49 main (int argc, char *argv[])
53 #define TEST_COUNT_ONE_BITS(FUNC, TYPE, BITS, MAX, ONE) \
54 ASSERT (FUNC (0) == 0); \
55 for (i = 0; i < BITS; i++) \
57 ASSERT (FUNC (ONE << i) == 1); \
58 for (j = i + 1; j < BITS; j++) \
59 ASSERT (FUNC ((ONE << i) | (ONE << j)) == 2); \
61 for (i = 0; i < 1000; i++) \
63 TYPE value = rand () ^ (rand () << 31 << 1); \
65 for (j = 0; j < BITS; j++) \
66 count += (value & (ONE << j)) != 0; \
67 ASSERT (count == FUNC (value)); \
69 ASSERT (FUNC (MAX) == BITS);
71 TEST_COUNT_ONE_BITS (count_one_bits, unsigned int, UINT_BIT, UINT_MAX, 1U);
72 TEST_COUNT_ONE_BITS (count_one_bits_l, unsigned long int,
73 ULONG_BIT, ULONG_MAX, 1UL);
74 #ifdef HAVE_UNSIGNED_LONG_LONG_INT
75 TEST_COUNT_ONE_BITS (count_one_bits_ll,
76 unsigned long long int, ULLONG_BIT, ULLONG_MAX, 1ULL);