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−/* Test counting of trailing zeros.
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−   Copyright (C) 2013-2015 Free Software Foundation, Inc.
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−
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−   This program is free software: you can redistribute it and/or modify
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−   it under the terms of the GNU General Public License as published by
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−   the Free Software Foundation; either version 3 of the License, or
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−   (at your option) any later version.
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−
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−   This program is distributed in the hope that it will be useful,
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−   but WITHOUT ANY WARRANTY; without even the implied warranty of
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−   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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−   GNU General Public License for more details.
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−
+
−   You should have received a copy of the GNU General Public License
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−   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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−
+
−/* Written by Paul Eggert.  */
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−
+
−#include <config.h>
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−
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−#include "count-trailing-zeros.h"
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−
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−#include <limits.h>
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−#include <stdio.h>
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−
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−#include "macros.h"
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−
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−#define UINT_BIT (sizeof (unsigned int) * CHAR_BIT)
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−#define ULONG_BIT (sizeof (unsigned long int) * CHAR_BIT)
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−#define ULLONG_BIT (sizeof (unsigned long long int) * CHAR_BIT)
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−
+
−#ifndef ULLONG_MAX
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−# define HALF (1ULL << (sizeof (unsigned long long int) * CHAR_BIT - 1))
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−# define ULLONG_MAX (HALF - 1 + HALF)
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−#endif
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−
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−int
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−main (int argc, char *argv[])
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−{
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−  int i, j;
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−
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−#define TEST_COUNT_TRAILING_ZEROS(FUNC, TYPE, BITS, MAX, ONE)   \
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−  ASSERT (FUNC (0) == BITS);                                    \
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−  for (i = 0; i < BITS; i++)                                    \
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−    {                                                           \
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−      ASSERT (FUNC (ONE << i) == i);                            \
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−      for (j = 0; j < i; j++)                                   \
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−        ASSERT (FUNC ((ONE << i) | (ONE << j)) == j);           \
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−    }                                                           \
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−  for (i = 0; i < 1000; i++)                                    \
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−    {                                                           \
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−      TYPE value = rand () ^ (rand () << 31 << 1);              \
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−      int count = 0;                                            \
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−      for (j = BITS - 1; 0 <= j; j--)                           \
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−        if (value & (ONE << j))                                 \
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−          count = j;                                            \
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−      ASSERT (count == FUNC (value));                           \
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−    }                                                           \
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−  ASSERT (FUNC (MAX) == 0);
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−
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−  TEST_COUNT_TRAILING_ZEROS (count_trailing_zeros, unsigned int,
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−                             UINT_BIT, UINT_MAX, 1U);
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−  TEST_COUNT_TRAILING_ZEROS (count_trailing_zeros_l, unsigned long int,
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−                             ULONG_BIT, ULONG_MAX, 1UL);
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−#ifdef HAVE_UNSIGNED_LONG_LONG_INT
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−  TEST_COUNT_TRAILING_ZEROS (count_trailing_zeros_ll, unsigned long long int,
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−                             ULLONG_BIT, ULLONG_MAX, 1ULL);
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−#endif
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−
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−  return 0;
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−}