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/* Tests of mpz_scan0 and mpz_scan1.
Copyright 2000-2003 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"
unsigned long
refmpz_scan (mpz_srcptr z, unsigned long i, int sought)
{
unsigned long z_bits = (unsigned long) ABSIZ(z) * GMP_NUMB_BITS;
do
{
if (mpz_tstbit (z, i) == sought)
return i;
i++;
}
while (i <= z_bits);
return ULONG_MAX;
}
unsigned long
refmpz_scan0 (mpz_srcptr z, unsigned long starting_bit)
{
return refmpz_scan (z, starting_bit, 0);
}
unsigned long
refmpz_scan1 (mpz_srcptr z, unsigned long starting_bit)
{
return refmpz_scan (z, starting_bit, 1);
}
void
check_ref (void)
{
static const int offset[] = {
-2, -1, 0, 1, 2, 3
};
mpz_t z;
int test, neg, sought, oindex, o;
mp_size_t size, isize;
unsigned long start, got, want;
mpz_init (z);
for (test = 0; test < 5; test++)
{
for (size = 0; size < 5; size++)
{
mpz_random2 (z, size);
for (neg = 0; neg <= 1; neg++)
{
if (neg)
mpz_neg (z, z);
for (isize = 0; isize <= size; isize++)
{
for (oindex = 0; oindex < numberof (offset); oindex++)
{
o = offset[oindex];
if ((int) isize*GMP_NUMB_BITS < -o)
continue; /* start would be negative */
start = isize*GMP_NUMB_BITS + o;
for (sought = 0; sought <= 1; sought++)
{
if (sought == 0)
{
got = mpz_scan0 (z, start);
want = refmpz_scan0 (z, start);
}
else
{
got = mpz_scan1 (z, start);
want = refmpz_scan1 (z, start);
}
if (got != want)
{
printf ("wrong at test=%d, size=%ld, neg=%d, start=%lu, sought=%d\n",
test, size, neg, start, sought);
printf (" z 0x");
mpz_out_str (stdout, -16, z);
printf ("\n");
printf (" got=%lu, want=%lu\n", got, want);
exit (1);
}
}
}
}
}
}
}
mpz_clear (z);
}
int
main (int argc, char *argv[])
{
tests_start ();
check_ref ();
tests_end ();
exit (0);
}
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