| /* Test file for mpfr_modf. |
| |
| Copyright 2007, 2008, 2009 Free Software Foundation, Inc. |
| Contributed by the Arenaire and Cacao projects, INRIA. |
| |
| This file is part of the GNU MPFR Library. |
| |
| The GNU MPFR 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 2.1 of the License, or (at your |
| option) any later version. |
| |
| The GNU MPFR 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 MPFR Library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "mpfr-test.h" |
| |
| #if MPFR_VERSION >= MPFR_VERSION_NUM(2,4,0) |
| |
| static void |
| check (const char *xis, const char *xfs, const char *xs, |
| mp_prec_t xip, mp_prec_t xfp, mp_prec_t xp, |
| int expected_return, mp_rnd_t rnd_mode) |
| { |
| int inexact; |
| mpfr_t xi, xf, x; |
| |
| mpfr_init2 (xi, xip); |
| mpfr_init2 (xf, xfp); |
| mpfr_init2 (x, xp); |
| mpfr_set_str1 (x, xs); |
| inexact = mpfr_modf (xi, xf, x, rnd_mode); |
| if (mpfr_cmp_str1 (xi, xis)) |
| { |
| printf ("mpfr_mof failed for x=%s, rnd=%s\n", |
| xs, mpfr_print_rnd_mode(rnd_mode)); |
| printf ("got integer value: "); |
| mpfr_out_str (stdout, 10, 0, xi, GMP_RNDN); |
| printf ("\nexpected %s\n", xis); |
| exit (1); |
| } |
| if (mpfr_cmp_str1 (xf, xfs)) |
| { |
| printf ("mpfr_mof failed for x=%s, rnd=%s\n", |
| xs, mpfr_print_rnd_mode(rnd_mode)); |
| printf ("got fractional value: "); |
| mpfr_out_str (stdout, 10, 0, xf, GMP_RNDN); |
| printf ("\nexpected %s\n", xfs); |
| exit (1); |
| } |
| if (inexact != expected_return) |
| { |
| printf ("mpfr_mof failed for x=%s, rnd=%s\n", |
| xs, mpfr_print_rnd_mode(rnd_mode)); |
| printf ("got return value: %d, expected %d\n", inexact, expected_return); |
| exit (1); |
| } |
| mpfr_clears (xi, xf, x, (mpfr_ptr) 0); |
| } |
| |
| static void |
| check_nans (void) |
| { |
| mpfr_t x, xi, xf; |
| |
| mpfr_init2 (x, 123); |
| mpfr_init2 (xi, 123); |
| mpfr_init2 (xf, 123); |
| |
| /* nan */ |
| mpfr_set_nan (x); |
| mpfr_modf (xi, xf, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (xi)); |
| MPFR_ASSERTN (mpfr_nan_p (xf)); |
| |
| /* +inf */ |
| mpfr_set_inf (x, 1); |
| mpfr_modf (xi, xf, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_inf_p (xi)); |
| MPFR_ASSERTN (mpfr_sgn (xi) > 0); |
| MPFR_ASSERTN (mpfr_zero_p (xf)); |
| |
| /* -inf */ |
| mpfr_set_inf (x, -1); |
| mpfr_modf (xi ,xf, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_inf_p (xi)); |
| MPFR_ASSERTN (mpfr_sgn (xi) < 0); |
| MPFR_ASSERTN (mpfr_zero_p (xf)); |
| |
| mpfr_clear (x); |
| mpfr_clear (xi); |
| mpfr_clear (xf); |
| } |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| tests_start_mpfr (); |
| |
| check_nans (); |
| |
| check ("61680","3.52935791015625e-1", "61680.352935791015625", |
| 53, 53, 53, 0, GMP_RNDZ); |
| check ("-53968","-3.529052734375e-1", "-53970.352935791015625", |
| 13, 13, 53, 2, GMP_RNDZ); |
| check ("61632","3.525390625e-1", "61648.352935791015625", |
| 10, 10, 53, -2, GMP_RNDZ); |
| check ("61680", "0", "61680", 53, 53, 53, 0, GMP_RNDZ); |
| check ("-53968","0", "-53970", 13, 13, 53, 1, GMP_RNDZ); |
| check ("-43392","0", "-43399", 13, 13, 53, 1, GMP_RNDU); |
| check ("-52720","0", "-52719", 13, 13, 53, -1, GMP_RNDD); |
| check ("61632", "0", "61648", 10, 10, 53, -1, GMP_RNDZ); |
| |
| tests_end_mpfr (); |
| return 0; |
| } |
| |
| #else |
| |
| int |
| main (void) |
| { |
| printf ("Warning! Test disabled for this MPFR version.\n"); |
| return 0; |
| } |
| |
| #endif |