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143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/* Exercise some mpz_..._si functions.
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Copyright 2013 Free Software Foundation, Inc.
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This file is part of the GNU MP Library test suite.
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The GNU MP Library test suite is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of the License,
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or (at your option) any later version.
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The GNU MP Library test suite is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along with
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the GNU MP Library test suite. If not, see http://www.gnu.org/licenses/. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "testutils.h"
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int
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check_si (mpz_t sz, mpz_t oz, long si, long oi, int c)
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{
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mpz_t t;
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int fail;
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if (mpz_cmp_si (sz, oi) != c)
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{
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printf ("mpz_cmp_si (sz, %ld) != %i.\n", oi, c);
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printf (" sz="); mpz_out_str (stdout, 10, sz); printf ("\n");
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abort ();
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}
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if ((si < oi ? -1 : si > oi) != c)
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return 1;
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mpz_init_set_si (t, si);
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if ((fail = mpz_cmp_si (sz, si)) != 0)
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printf ("mpz_cmp_si (sz, %ld) != 0.\n", si);
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if (mpz_cmp_si (oz, si) != -c)
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printf ("mpz_cmp_si (oz, %ld) != %i.\n", si, -c), fail = 1;
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if (! mpz_fits_slong_p (sz))
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printf ("mpz_fits_slong_p (sz) != 1.\n"), fail = 1;
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if (mpz_get_si (sz) != si)
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printf ("mpz_get_si (sz) != %ld.\n", si), fail = 1;
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if (mpz_cmp (t, sz) != 0)
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{
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printf ("mpz_init_set_si (%ld) failed.\n", si);
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printf (" got="); mpz_out_str (stdout, 10, t); printf ("\n");
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fail = 1;
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}
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mpz_clear (t);
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if (fail)
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{
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printf (" sz="); mpz_out_str (stdout, 10, sz); printf ("\n");
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printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
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printf (" si=%ld\n", si);
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abort ();
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}
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return 0;
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}
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void
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try_op_si (int c)
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{
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long si, oi;
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mpz_t sz, oz;
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si = c;
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mpz_init_set_si (sz, si);
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oi = si;
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mpz_init_set (oz, sz);
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do {
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si *= 2; /* c * 2^k */
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mpz_mul_2exp (sz, sz, 1);
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if (check_si (sz, oz, si, oi, c))
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{
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mpz_set (oz, sz);
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break;
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}
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oi = si + c; /* c * (2^k + 1) */
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if (c == -1)
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mpz_sub_ui (oz, sz, 1);
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else
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mpz_add_ui (oz, sz, 1);
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if (check_si (oz, sz, oi, si, c))
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break;
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oi = (si - c) * 2 + c; /* c * (2^K - 1) */
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mpz_mul_si (oz, sz, 2*c);
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if (c == -1)
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mpz_ui_sub (oz, 1, oz); /* oz = sz * 2 + 1 */
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else
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mpz_sub_ui (oz, oz, 1); /* oz = sz * 2 - 1 */
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} while (check_si (oz, sz, oi, si, c) == 0);
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mpz_clear (sz);
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if (mpz_fits_slong_p (oz))
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{
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printf ("Should not fit a signed long any more.\n");
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printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
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abort ();
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}
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if (mpz_cmp_si (oz, -c) != c)
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{
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printf ("mpz_cmp_si (oz, %i) != %i.\n", c, c);
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printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
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abort ();
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}
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mpz_mul_2exp (oz, oz, 1);
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if (mpz_cmp_si (oz, -c) != c)
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{
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printf ("mpz_cmp_si (oz, %i) != %i.\n", c, c);
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printf (" oz="); mpz_out_str (stdout, 10, oz); printf ("\n");
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abort ();
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}
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mpz_clear (oz);
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}
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void
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testmain (int argc, char *argv[])
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{
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try_op_si (-1);
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try_op_si (1);
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}
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