1 /* Test file for mpfr_check.
2
3 Copyright 2003-2004, 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 PRINT_ERROR(s) \
26 (printf ("mpfr_check failed " s " Prec=%lu\n", (unsigned long) pr), \
27 exit(1))
28
29 int
30 main (void)
31 {
32 mpfr_t a;
33 mp_limb_t *p, tmp;
34 mp_size_t s;
35 mpfr_prec_t pr;
36 int max;
37
38 tests_start_mpfr ();
39 for (pr = MPFR_PREC_MIN ; pr < 500 ; pr++)
40 {
41 mpfr_init2 (a, pr);
42 if (!mpfr_check (a))
43 PRINT_ERROR ("for init");
44 /* Check special cases */
45 MPFR_SET_NAN (a);
46 if (!mpfr_check (a))
47 PRINT_ERROR ("for nan");
48 MPFR_SET_POS (a);
49 MPFR_SET_INF (a);
50 if (!mpfr_check (a))
51 PRINT_ERROR ("for inf");
52 MPFR_SET_ZERO (a);
53 if (!mpfr_check (a))
54 PRINT_ERROR ("for zero");
55 MPFR_EXP (a) = MPFR_EXP_MIN;
56 if (mpfr_check (a))
57 PRINT_ERROR ("for EXP = MPFR_EXP_MIN");
58 /* Check var */
59 mpfr_set_ui (a, 2, MPFR_RNDN);
60 if (!mpfr_check (a))
61 PRINT_ERROR ("for set_ui");
62 mpfr_clear_overflow ();
63 max = 1000; /* Allows max 2^1000 bits for the exponent */
64 while (!mpfr_overflow_p () && max > 0)
65 {
66 /* this call to mpfr_mul with identical arguments is intentional,
67 and should not be replaced by mpfr_sqr */
68 mpfr_mul (a, a, a, MPFR_RNDN);
69 if (!mpfr_check (a))
70 PRINT_ERROR ("for mul");
71 max--;
72 }
73 if (max == 0)
74 PRINT_ERROR ("for overflow");
75 mpfr_set_ui (a, 2137, MPFR_RNDN);
76 /* Corrupt a and check for it */
77 MPFR_SIGN (a) = 2;
78 if (mpfr_check (a))
79 PRINT_ERROR ("sgn");
80 MPFR_SET_POS (a);
81 /* Check prec */
82 MPFR_PREC (a) = MPFR_PREC_MIN - 1;
83 if (mpfr_check (a)) PRINT_ERROR ("precmin");
84 #if MPFR_VERSION_MAJOR < 3
85 /* Disable the test with MPFR >= 3 since mpfr_prec_t is now signed.
86 The "if" below is sufficient, but the MPFR_PREC_MAX+1 generates
87 a warning with GCC 4.4.4 even though the test is always false. */
88 if ((mpfr_prec_t) 0 - 1 > 0)
89 {
90 MPFR_PREC (a) = MPFR_PREC_MAX + 1;
91 if (mpfr_check (a))
92 PRINT_ERROR ("precmax");
93 }
94 #endif
95 MPFR_PREC (a) = pr;
96 if (!mpfr_check (a))
97 PRINT_ERROR ("prec");
98 /* Check exponent */
99 MPFR_EXP (a) = MPFR_EXP_INVALID;
100 if (mpfr_check(a))
101 PRINT_ERROR ("exp invalid");
102 MPFR_EXP (a) = -MPFR_EXP_INVALID;
103 if (mpfr_check(a))
104 PRINT_ERROR ("-exp invalid");
105 MPFR_EXP(a) = 0;
106 if (!mpfr_check(a)) PRINT_ERROR ("exp 0");
107 /* Check Mantissa */
108 p = MPFR_MANT(a);
109 MPFR_MANT (a) = NULL;
110 if (mpfr_check (a))
111 PRINT_ERROR ("Mantissa Null Ptr");
112 MPFR_MANT (a) = p;
113 /* Check size */
114 s = MPFR_GET_ALLOC_SIZE (a);
115 MPFR_SET_ALLOC_SIZE (a, 0);
116 if (mpfr_check (a))
117 PRINT_ERROR ("0 size");
118 MPFR_SET_ALLOC_SIZE (a, MP_SIZE_T_MIN);
119 if (mpfr_check (a)) PRINT_ERROR ("min size");
120 MPFR_SET_ALLOC_SIZE (a, MPFR_LIMB_SIZE (a) - 1);
121 if (mpfr_check (a))
122 PRINT_ERROR ("size < prec");
123 MPFR_SET_ALLOC_SIZE (a, s);
124 /* Check normal form */
125 tmp = MPFR_MANT (a)[0];
126 if ((pr % GMP_NUMB_BITS) != 0)
127 {
128 MPFR_MANT(a)[0] = MPFR_LIMB_MAX;
129 if (mpfr_check (a))
130 PRINT_ERROR ("last bits non 0");
131 }
132 MPFR_MANT(a)[0] = tmp;
133 MPFR_MANT(a)[MPFR_LIMB_SIZE(a)-1] &= MPFR_LIMB_MASK (GMP_NUMB_BITS-1);
134 if (mpfr_check (a))
135 PRINT_ERROR ("last bits non 0");
136 /* Final */
137 mpfr_set_ui (a, 2137, MPFR_RNDN);
138 if (!mpfr_check (a))
139 PRINT_ERROR ("after last set");
140 mpfr_clear (a);
141 if (mpfr_check (a))
142 PRINT_ERROR ("after clear");
143 }
144 tests_end_mpfr ();
145 return 0;
146 }