tlog1p.c revision 1.1.1.2 
1/* Test file for mpfr_log1p.
2
3Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
4Contributed by the AriC and Caramel projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#include <stdio.h>
24#include <stdlib.h>
25
26#include "mpfr-test.h"
27
28#ifdef CHECK_EXTERNAL
29static int
30test_log1p (mpfr_ptr a, mpfr_srcptr b, mpfr_rnd_t rnd_mode)
31{
32  int res;
33  int ok = rnd_mode == MPFR_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53;
34  if (ok)
35    {
36      mpfr_print_raw (b);
37    }
38  res = mpfr_log1p (a, b, rnd_mode);
39  if (ok)
40    {
41      printf (" ");
42      mpfr_print_raw (a);
43      printf ("\n");
44    }
45  return res;
46}
47#else
48#define test_log1p mpfr_log1p
49#endif
50
51#define TEST_FUNCTION test_log1p
52#define TEST_RANDOM_EMAX 80
53#include "tgeneric.c"
54
55static void
56special (void)
57{
58  mpfr_t x;
59  int inex;
60
61  mpfr_init (x);
62
63  mpfr_set_nan (x);
64  mpfr_clear_flags ();
65  inex = test_log1p (x, x, MPFR_RNDN);
66  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
67  MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
68
69  mpfr_set_inf (x, -1);
70  mpfr_clear_flags ();
71  inex = test_log1p (x, x, MPFR_RNDN);
72  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
73  MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
74
75  mpfr_set_inf (x, 1);
76  mpfr_clear_flags ();
77  inex = test_log1p (x, x, MPFR_RNDN);
78  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0);
79  MPFR_ASSERTN (__gmpfr_flags == 0);
80
81  mpfr_set_ui (x, 0, MPFR_RNDN);
82  mpfr_clear_flags ();
83  inex = test_log1p (x, x, MPFR_RNDN);
84  MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x) && inex == 0);
85  MPFR_ASSERTN (__gmpfr_flags == 0);
86  mpfr_neg (x, x, MPFR_RNDN);
87  mpfr_clear_flags ();
88  inex = test_log1p (x, x, MPFR_RNDN);
89  MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_NEG (x) && inex == 0);
90  MPFR_ASSERTN (__gmpfr_flags == 0);
91
92  mpfr_set_si (x, -1, MPFR_RNDN);
93  mpfr_clear_flags ();
94  inex = test_log1p (x, x, MPFR_RNDN);
95  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
96  MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_DIVBY0);
97
98  mpfr_set_si (x, -2, MPFR_RNDN);
99  mpfr_clear_flags ();
100  inex = test_log1p (x, x, MPFR_RNDN);
101  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
102  MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
103
104  mpfr_clear (x);
105}
106
107static void
108other (void)
109{
110  mpfr_t x, y;
111
112  /* Bug reported by Guillaume Melquiond on 2006-08-14. */
113  mpfr_init2 (x, 53);
114  mpfr_set_str (x, "-1.5e4f72873ed9a@-100", 16, MPFR_RNDN);
115  mpfr_init2 (y, 57);
116  mpfr_log1p (y, x, MPFR_RNDU);
117  if (mpfr_cmp (x, y) != 0)
118    {
119      printf ("Error in tlog1p for x = ");
120      mpfr_out_str (stdout, 16, 0, x, MPFR_RNDN);
121      printf (", rnd = MPFR_RNDU\nExpected ");
122      mpfr_out_str (stdout, 16, 15, x, MPFR_RNDN);
123      printf ("\nGot      ");
124      mpfr_out_str (stdout, 16, 15, y, MPFR_RNDN);
125      printf ("\n");
126      exit (1);
127    }
128
129  mpfr_clear (y);
130  mpfr_clear (x);
131  return;
132}
133
134int
135main (int argc, char *argv[])
136{
137  tests_start_mpfr ();
138
139  special ();
140  other ();
141
142  test_generic (2, 100, 50);
143
144  data_check ("data/log1p", mpfr_log1p, "mpfr_log1p");
145  bad_cases (mpfr_log1p, mpfr_expm1, "mpfr_log1p", 256, -64, 40,
146             4, 128, 800, 40);
147
148  tests_end_mpfr ();
149  return 0;
150}
151