1/* Test file for mpfr_eint.
2
3Copyright 2005-2023 Free Software Foundation, Inc.
4Contributed by the AriC and Caramba 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
20https://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 "mpfr-test.h"
24
25#define TEST_FUNCTION mpfr_eint
26#include "tgeneric.c"
27
28static void
29check_specials (void)
30{
31  mpfr_t  x, y;
32
33  mpfr_init2 (x, 123L);
34  mpfr_init2 (y, 123L);
35
36  mpfr_set_nan (x);
37  mpfr_eint (y, x, MPFR_RNDN);
38  if (! mpfr_nan_p (y))
39    {
40      printf ("Error: eint(NaN) != NaN\n");
41      exit (1);
42    }
43
44  mpfr_set_inf (x, 1);
45  mpfr_eint (y, x, MPFR_RNDN);
46  if (! (mpfr_inf_p (y) && mpfr_sgn (y) > 0))
47    {
48      printf ("Error: eint(+Inf) != +Inf\n");
49      exit (1);
50    }
51
52  mpfr_set_inf (x, -1);
53  mpfr_eint (y, x, MPFR_RNDN);
54  if (! (mpfr_zero_p (y) && MPFR_IS_NEG (y)))
55    {
56      printf ("Error: eint(-Inf) != -0\n");
57      exit (1);
58    }
59
60  /* eint(+/-0) = -Inf */
61  mpfr_set_ui (x, 0, MPFR_RNDN);
62  mpfr_eint (y, x, MPFR_RNDN);
63  if (! (mpfr_inf_p (y) && mpfr_sgn (y) < 0))
64    {
65      printf ("Error: eint(+0) != -Inf\n");
66      exit (1);
67    }
68  mpfr_neg (x, x, MPFR_RNDN);
69  mpfr_eint (y, x, MPFR_RNDN);
70  if (! (mpfr_inf_p (y) && mpfr_sgn (y) < 0))
71    {
72      printf ("Error: eint(-0) != -Inf\n");
73      exit (1);
74    }
75
76  mpfr_set_prec (x, 17);
77  mpfr_set_prec (y, 17);
78  mpfr_set_str_binary (x, "1.0111110100100110e-2");
79  mpfr_set_str_binary (y, "-1.0010101001110100e-10");
80  mpfr_eint (x, x, MPFR_RNDZ);
81  if (mpfr_cmp (x, y))
82    {
83      printf ("Error for x=1.0111110100100110e-2, MPFR_RNDZ\n");
84      printf ("expected "); mpfr_dump (y);
85      printf ("got      "); mpfr_dump (x);
86      exit (1);
87    }
88
89  mpfr_set_prec (x, 53);
90  mpfr_set_prec (y, 53);
91  mpfr_set_str_binary (x, "0.10E4");
92  mpfr_eint (x, x, MPFR_RNDN);
93  mpfr_set_str (y, "440.37989953483827", 10, MPFR_RNDN);
94  if (mpfr_cmp (x, y) != 0)
95    {
96      printf ("Error for x=0.10E4, MPFR_RNDZ\n");
97      printf ("expected "); mpfr_dump (y);
98      printf ("got      "); mpfr_dump (x);
99      exit (1);
100    }
101
102  mpfr_set_prec (x, 63);
103  mpfr_set_prec (y, 63);
104  mpfr_set_str_binary (x, "1.01111101011100111000011010001000101101011000011001111101011010e-2");
105  mpfr_eint (x, x, MPFR_RNDZ);
106  mpfr_set_str_binary (y, "1.11010110001101000001010010000100001111001000100100000001011100e-17");
107  if (mpfr_cmp (x, y) != 0)
108    {
109      printf ("Error (1) for MPFR_RNDZ\n");
110      printf ("expected "); mpfr_dump (y);
111      printf ("got      "); mpfr_dump (x);
112      exit (1);
113    }
114
115  mpfr_set_prec (x, 2);
116  mpfr_set_prec (y, 2);
117  mpfr_set_si (x, -1, MPFR_RNDN);
118  mpfr_eint (x, x, MPFR_RNDN); /* eint1(1) = 0.219383934395520 */
119  mpfr_set_str_binary (y, "-1e-2");
120  if (mpfr_cmp (x, y) != 0)
121    {
122      printf ("Error for x=-1, MPFR_RNDN\n");
123      printf ("expected "); mpfr_dump (y);
124      printf ("got      "); mpfr_dump (x);
125      exit (1);
126    }
127
128  mpfr_set_prec (x, 10);
129  mpfr_set_prec (y, 10);
130  mpfr_set_si (x, -2, MPFR_RNDN);
131  mpfr_eint (y, x, MPFR_RNDN); /* eint1(2) = 0.0489005107080611 */
132  if (mpfr_cmp_si_2exp (y, -801, -14) != 0)
133    {
134      printf ("Error for x=-2, MPFR_RNDN\n");
135      printf ("expected -801/2^14\n");
136      printf ("got      "); mpfr_dump (y);
137      exit (1);
138    }
139
140  /* check large x */
141  mpfr_set_prec (x, 53);
142  mpfr_set_prec (y, 53);
143  mpfr_set_str_binary (x, "1E6");
144  mpfr_eint (x, x, MPFR_RNDN);
145  mpfr_set_str_binary (y, "10100011110001101001110000110010111000100111010001E37");
146  if (mpfr_cmp (x, y) != 0)
147    {
148      printf ("Error for x=2^6, MPFR_RNDN\n");
149      printf ("expected "); mpfr_dump (y);
150      printf ("got      "); mpfr_dump (x);
151      exit (1);
152    }
153  mpfr_set_str_binary (x, "1E7");
154  mpfr_eint (x, x, MPFR_RNDN);
155  mpfr_set_str_binary (y, "11001100100011110000101001011010110111111011110011E128");
156  if (mpfr_cmp (x, y) != 0)
157    {
158      printf ("Error for x=2^7, MPFR_RNDN\n");
159      printf ("expected "); mpfr_dump (y);
160      printf ("got      "); mpfr_dump (x);
161      exit (1);
162    }
163  mpfr_set_str_binary (x, "1E8");
164  mpfr_eint (x, x, MPFR_RNDN);
165  mpfr_set_str_binary (y, "1010000110000101111111011011000101001000101011101001E310");
166  if (mpfr_cmp (x, y) != 0)
167    {
168      printf ("Error for x=2^8, MPFR_RNDN\n");
169      printf ("expected "); mpfr_dump (y);
170      printf ("got      "); mpfr_dump (x);
171      exit (1);
172    }
173  mpfr_set_str_binary (x, "1E9");
174  mpfr_eint (x, x, MPFR_RNDN);
175  mpfr_set_str_binary (y, "11001010101000001010101101110000010110011101110010101E677");
176  if (mpfr_cmp (x, y) != 0)
177    {
178      printf ("Error for x=2^9, MPFR_RNDN\n");
179      printf ("expected "); mpfr_dump (y);
180      printf ("got      "); mpfr_dump (x);
181      exit (1);
182    }
183  mpfr_set_str_binary (x, "1E10");
184  mpfr_eint (x, x, MPFR_RNDN);
185  mpfr_set_str_binary (y, "10011111111010010110110101101000101100101010101101101E1415");
186  if (mpfr_cmp (x, y) != 0)
187    {
188      printf ("Error for x=2^10, MPFR_RNDN\n");
189      printf ("expected "); mpfr_dump (y);
190      printf ("got      "); mpfr_dump (x);
191      exit (1);
192    }
193
194  /* Run-time error at si_op.c:42:31 with r9996 on an x86-64 Linux machine,
195     using CFLAGS="-fsanitize=undefined -fno-sanitize-recover". */
196  mpfr_set_prec (x, 32);
197  mpfr_set_prec (y, 46);
198  mpfr_set_si_2exp (x, -1, -1, MPFR_RNDN);
199  mpfr_eint (y, x, MPFR_RNDN);
200
201  mpfr_set_prec (x, 10);
202  mpfr_set_prec (y, 6);
203  mpfr_set_str (x, "-7.875", 10, MPFR_RNDN);
204  mpfr_eint (y, x, MPFR_RNDN);
205  if (mpfr_cmp_si_2exp (y, -45, -20) != 0)
206    {
207      printf ("Error for x=-7.875, MPFR_RNDN\n");
208      printf ("expected -45/2^20\n");
209      printf ("got      "); mpfr_dump (y);
210      exit (1);
211    }
212
213  mpfr_clear (x);
214  mpfr_clear (y);
215}
216
217int
218main (int argc, char *argv[])
219{
220  tests_start_mpfr ();
221
222  if (argc != 1) /* teint x [prec] */
223    {
224      mpfr_t x;
225      mpfr_prec_t p;
226      p = (argc < 3) ? 53 : atoi (argv[2]);
227      mpfr_init2 (x, p);
228      mpfr_set_str (x, argv[1], 10, MPFR_RNDN);
229      printf ("eint(");
230      mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
231      printf (")=");
232      mpfr_eint (x, x, MPFR_RNDN);
233      mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
234      printf ("\n");
235      mpfr_clear (x);
236    }
237  else
238    {
239      check_specials ();
240
241      test_generic (MPFR_PREC_MIN, 100, 100);
242    }
243
244  tests_end_mpfr ();
245  return 0;
246}
247