138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/* Tests of mpz_scan0 and mpz_scan1.
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Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "mpir.h"
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#include "gmp-impl.h"
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#include "tests.h"
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unsigned long
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refmpz_scan (mpz_srcptr z, unsigned long i, int sought)
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{
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unsigned long z_bits = (unsigned long) ABSIZ(z) * GMP_NUMB_BITS;
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do
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{
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if (mpz_tstbit (z, i) == sought)
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return i;
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i++;
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}
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while (i <= z_bits);
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return ULONG_MAX;
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}
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unsigned long
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refmpz_scan0 (mpz_srcptr z, unsigned long starting_bit)
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{
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return refmpz_scan (z, starting_bit, 0);
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}
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unsigned long
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refmpz_scan1 (mpz_srcptr z, unsigned long starting_bit)
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{
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return refmpz_scan (z, starting_bit, 1);
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}
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void
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check_ref (void)
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{
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static const int offset[] = {
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-2, -1, 0, 1, 2, 3
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};
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mpz_t z;
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int test, neg, sought, oindex, o;
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mp_size_t size, isize;
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unsigned long start, got, want;
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gmp_randstate_t rands;
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mpz_init (z);
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gmp_randinit_default(rands);
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for (test = 0; test < 5; test++)
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{
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for (size = 0; size < 5; size++)
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{
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mpz_urandomb (z, rands, (unsigned long) (ABS (size) * GMP_NUMB_BITS));
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if (size < 0)SIZ(z) = -SIZ(z);
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for (neg = 0; neg <= 1; neg++)
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{
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if (neg)
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mpz_neg (z, z);
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for (isize = 0; isize <= size; isize++)
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{
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for (oindex = 0; oindex < numberof (offset); oindex++)
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{
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o = offset[oindex];
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if ((int) isize*GMP_NUMB_BITS < -o)
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continue; /* start would be negative */
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start = isize*GMP_NUMB_BITS + o;
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for (sought = 0; sought <= 1; sought++)
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{
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if (sought == 0)
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{
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got = mpz_scan0 (z, start);
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want = refmpz_scan0 (z, start);
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}
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else
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{
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got = mpz_scan1 (z, start);
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want = refmpz_scan1 (z, start);
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}
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if (got != want)
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{
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printf ("wrong at test=%d, size=%ld, neg=%d, start=%lu, sought=%d\n",
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test, size, neg, start, sought);
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printf (" z 0x");
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mpz_out_str (stdout, -16, z);
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printf ("\n");
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printf (" got=%lu, want=%lu\n", got, want);
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exit (1);
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}
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}
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}
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}
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}
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}
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}
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mpz_clear (z);gmp_randclear(rands);
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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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tests_start ();
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check_ref ();
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tests_end ();
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exit (0);
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}
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