1 /* Test file for mpfr_trunc, mpfr_ceil, mpfr_floor.
2
3 Copyright 1999-2004, 2006-2023 Free Software Foundation, Inc.
4 Contributed by the AriC and Caramba projects, INRIA.
5
6 This file is part of the GNU MPFR Library.
7
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
12
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23 #include "mpfr-test.h"
24
25 #define SIZEX 100
26
27 int
main(void)28 main (void)
29 {
30 int j, k;
31 mpfr_t x, y, z, t, y2, z2, t2;
32
33 tests_start_mpfr ();
34
35 mpfr_inits2 (SIZEX, x, y, z, t, y2, z2, t2, (mpfr_ptr) 0);
36
37 mpfr_set_str1 (x, "0.5");
38 mpfr_ceil(y, x);
39 if (mpfr_cmp_ui (y, 1))
40 {
41 printf ("Error in mpfr_ceil for x=0.5: expected 1.0, got ");
42 mpfr_dump (y);
43 exit (1);
44 }
45
46 mpfr_set_ui (x, 0, MPFR_RNDN);
47 mpfr_ceil(y, x);
48 if (mpfr_cmp_ui(y,0))
49 {
50 printf ("Error in mpfr_ceil for x=0.0: expected 0.0, got ");
51 mpfr_dump (y);
52 exit (1);
53 }
54
55 mpfr_set_ui (x, 1, MPFR_RNDN);
56 mpfr_ceil(y, x);
57 if (mpfr_cmp_ui(y,1))
58 {
59 printf ("Error in mpfr_ceil for x=1.0: expected 1.0, got ");
60 mpfr_dump (y);
61 exit (1);
62 }
63
64 for (j=0;j<1000;j++)
65 {
66 mpfr_urandomb (x, RANDS);
67 MPFR_EXP (x) = 2;
68
69 for (k = 2; k <= SIZEX; k++)
70 {
71 mpfr_set_prec(y, k);
72 mpfr_set_prec(y2, k);
73 mpfr_set_prec(z, k);
74 mpfr_set_prec(z2, k);
75 mpfr_set_prec(t, k);
76 mpfr_set_prec(t2, k);
77
78 mpfr_floor(y, x);
79 mpfr_set(y2, x, MPFR_RNDD);
80
81 mpfr_trunc(z, x);
82 mpfr_set(z2, x, MPFR_RNDZ);
83
84 mpfr_ceil(t, x);
85 mpfr_set(t2, x, MPFR_RNDU);
86
87 if (!mpfr_eq(y, y2, k))
88 {
89 printf ("Error in floor, x = "); mpfr_dump (x);
90 printf ("floor(x) = "); mpfr_dump (y);
91 printf ("round(x, RNDD) = "); mpfr_dump (y2);
92 exit(1);
93 }
94
95 if (!mpfr_eq(z, z2, k))
96 {
97 printf ("Error in trunc, x = "); mpfr_dump (x);
98 printf ("trunc(x) = "); mpfr_dump (z);
99 printf ("round(x, RNDZ) = "); mpfr_dump (z2);
100 exit(1);
101 }
102
103 if (!mpfr_eq(y, y2, k))
104 {
105 printf ("Error in ceil, x = "); mpfr_dump (x);
106 printf ("ceil(x) = "); mpfr_dump (t);
107 printf ("round(x, RNDU) = "); mpfr_dump (t2);
108 exit(1);
109 }
110 MPFR_EXP(x)++;
111 }
112 }
113
114 mpfr_clears (x, y, z, t, y2, z2, t2, (mpfr_ptr) 0);
115
116 tests_end_mpfr ();
117 return 0;
118 }
119