| /* Test mpz_set_f. |
| |
| Copyright 2001 Free Software Foundation, Inc. |
| |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser 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 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 Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "gmp.h" |
| #include "gmp-impl.h" |
| #include "tests.h" |
| |
| |
| void |
| check_one (mpz_srcptr z) |
| { |
| static const int shift[] = { |
| 0, 1, BITS_PER_MP_LIMB, 2*BITS_PER_MP_LIMB, 5*BITS_PER_MP_LIMB |
| }; |
| |
| int sh, shneg, neg; |
| mpf_t f; |
| mpz_t got, want; |
| |
| mpf_init2 (f, mpz_sizeinbase(z,2)); |
| mpz_init (got); |
| mpz_init (want); |
| |
| for (sh = 0; sh < numberof(shift); sh++) |
| { |
| for (shneg = 0; shneg <= 1; shneg++) |
| { |
| for (neg = 0; neg <= 1; neg++) |
| { |
| mpf_set_z (f, z); |
| mpz_set (want, z); |
| |
| if (neg) |
| { |
| mpf_neg (f, f); |
| mpz_neg (want, want); |
| } |
| |
| if (shneg) |
| { |
| mpz_tdiv_q_2exp (want, want, shift[sh]); |
| mpf_div_2exp (f, f, shift[sh]); |
| } |
| else |
| { |
| mpz_mul_2exp (want, want, shift[sh]); |
| mpf_mul_2exp (f, f, shift[sh]); |
| } |
| |
| mpz_set_f (got, f); |
| MPZ_CHECK_FORMAT (got); |
| |
| if (mpz_cmp (got, want) != 0) |
| { |
| printf ("wrong result\n"); |
| printf (" shift %d\n", shneg ? -shift[sh] : shift[sh]); |
| printf (" neg %d\n", neg); |
| mpf_trace (" f", f); |
| mpz_trace (" got", got); |
| mpz_trace (" want", want); |
| abort (); |
| } |
| } |
| } |
| } |
| |
| mpf_clear (f); |
| mpz_clear (got); |
| mpz_clear (want); |
| } |
| |
| |
| void |
| check_various (void) |
| { |
| mpz_t z; |
| |
| mpz_init (z); |
| |
| mpz_set_ui (z, 0L); |
| check_one (z); |
| |
| mpz_set_si (z, 123L); |
| check_one (z); |
| |
| mpz_rrandomb (z, RANDS, 2*BITS_PER_MP_LIMB); |
| check_one (z); |
| |
| mpz_rrandomb (z, RANDS, 5*BITS_PER_MP_LIMB); |
| check_one (z); |
| |
| mpz_clear (z); |
| } |
| |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| #if GMP_NAIL_BITS == 0 |
| tests_start (); |
| mp_trace_base = 16; |
| |
| check_various (); |
| |
| tests_end (); |
| #endif |
| exit (0); |
| } |