/* Test mpz_popcount.
Copyright 2001 , 2005 Free Software Foundation , Inc .
This file is part of the GNU MP Library test suite .
The GNU MP Library test suite 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 .
The GNU MP Library test suite 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
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp-impl.h"
#include "tests.h"
void
check_onebit (
void )
{
mpz_t n;
unsigned long i, got;
mpz_init (n);
for (i =
0 ; i <
5 * GMP_LIMB_BITS; i++)
{
mpz_setbit (n, i);
got = mpz_popcount (n);
if (got !=
1 )
{
printf (
"mpz_popcount wrong on single bit at %lu\n" , i);
printf (
" got %lu, want 1\n" , got);
abort();
}
mpz_clrbit (n, i);
}
mpz_clear (n);
}
void
check_data (
void )
{
static const struct {
const char *n;
unsigned long want;
} data[] = {
{
"-1" , ~ (
unsigned long )
0 },
{
"-12345678" , ~ (
unsigned long )
0 },
{
"0" ,
0 },
{
"1" ,
1 },
{
"3" ,
2 },
{
"5" ,
2 },
{
"0xFFFF" ,
16 },
{
"0xFFFFFFFF" ,
32 },
{
"0xFFFFFFFFFFFFFFFF" ,
64 },
{
"0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF" ,
128 },
};
unsigned long got;
int i;
mpz_t n;
mpz_init (n);
for (i =
0 ; i < numberof (data); i++)
{
mpz_set_str_or_abort (n, data[i].n,
0 );
got = mpz_popcount (n);
if (got != data[i].want)
{
printf (
"mpz_popcount wrong at data[%d]\n" , i);
printf (
" n \" %s\
"\n" , data[i].n);
printf (
" " ); mpz_out_str (stdout,
10 , n); printf (
"\n" );
printf (
" 0x" ); mpz_out_str (stdout,
16 , n); printf (
"\n" );
printf (
" got %lu\n" , got);
printf (
" want %lu\n" , data[i].want);
abort ();
}
}
mpz_clear (n);
}
unsigned long
refmpz_popcount (mpz_t arg)
{
mp_size_t n, i;
unsigned long cnt;
mp_limb_t x;
n = SIZ(arg);
if (n <
0 )
return ~(
unsigned long )
0 ;
cnt =
0 ;
for (i =
0 ; i < n; i++)
{
x = PTR(arg)[i];
while (x !=
0 )
{
cnt += (x &
1 );
x >>=
1 ;
}
}
return cnt;
}
void
check_random (
void )
{
gmp_randstate_ptr rands;
mpz_t bs;
mpz_t arg;
unsigned long arg_size, size_range;
unsigned long got, ref;
int i;
rands = RANDS;
mpz_init (bs);
mpz_init (arg);
for (i =
0 ; i <
10000 ; i++)
{
mpz_urandomb (bs, rands,
32 );
size_range = mpz_get_ui (bs) %
11 +
2 ;
/* 0..4096 bit operands */
mpz_urandomb (bs, rands, size_range);
arg_size = mpz_get_ui (bs);
mpz_rrandomb (arg, rands, arg_size);
got = mpz_popcount (arg);
ref = refmpz_popcount (arg);
if (got != ref)
{
printf (
"mpz_popcount wrong on random\n" );
printf (
" " ); mpz_out_str (stdout,
10 , arg); printf (
"\n" );
printf (
" 0x" ); mpz_out_str (stdout,
16 , arg); printf (
"\n" );
printf (
" got %lu\n" , got);
printf (
" want %lu\n" , ref);
abort ();
}
}
mpz_clear (arg);
mpz_clear (bs);
}
int
main (
void )
{
tests_start ();
check_onebit ();
check_data ();
check_random ();
tests_end ();
exit (
0 );
}
Messung V0.5 in Prozent C=95 H=97 G=95
¤ Dauer der Verarbeitung: 0.28 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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