1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* Test file for mpfr_set_str.
Copyright 1999, 2001, 2002 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The 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 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 MPFR Library; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "gmp.h"
#include "mpfr.h"
#include "mpfr-impl.h"
#include "mpfr-test.h"
int
main (int argc, char *argv[])
{
mpfr_t x, y;
unsigned long k, bd, nc, i;
char *str, *str2;
mp_exp_t e;
int base, logbase, prec, baseprec;
if (argc>=2) /* tset_str <string> <prec> */
{
prec = (argc>=3) ? atoi(argv[2]) : 53;
mpfr_init2 (x, prec);
mpfr_set_str_raw (x, argv[1]);
mpfr_out_str (stdout, 10, 0, x, GMP_RNDN);
putchar ('\n');
mpfr_clear (x);
return 0;
}
SEED_RAND (time(NULL));
nc = (argc > 1) ? atoi(argv[1]) : 53;
if (nc < 100)
nc = 100;
bd = LONG_RAND() & 8;
str2 = str = (char *) malloc (nc * sizeof(char));
if (bd)
{
for(k = 1; k <= bd; k++)
*(str2++) = (LONG_RAND() & 1) + '0';
}
else
*(str2++) = '0';
*(str2++) = '.';
for (k = 1; k < nc - 17 - bd; k++)
*(str2++) = '0' + (LONG_RAND() & 1);
*(str2++) = 'e';
sprintf (str2, "%d", (int) LONG_RAND() - (1 << 30));
mpfr_init2 (x, nc + 10);
mpfr_set_str_raw (x, str);
mpfr_set_prec (x, 54);
mpfr_set_str_raw (x, "0.100100100110110101001010010101111000001011100100101010E-529");
mpfr_init2 (y, 54);
mpfr_set_str (y, "4.936a52bc17254@-133", 16, GMP_RNDN);
if (mpfr_cmp (x, y))
{
fprintf (stderr, "Error in mpfr_set_str\n");
mpfr_print_binary(x);
putchar('\n');
mpfr_print_binary(y);
putchar('\n');
mpfr_clear(x);
mpfr_clear(y);
exit(1);
}
free(str);
mpfr_set_prec (x, 53);
mpfr_set_str_raw (x, "+110101100.01010000101101000000100111001000101011101110E00");
mpfr_set_str_raw (x, "1.0");
if (mpfr_get_d1 (x) != 1.0)
{
fprintf (stderr, "Error in mpfr_set_str_raw for s=1.0\n");
mpfr_clear(x);
mpfr_clear(y);
exit(1);
}
mpfr_set_str_raw (x, "+0000");
mpfr_set_str_raw (x, "+0000E0");
mpfr_set_str_raw (x, "0000E0");
if (mpfr_get_d1 (x) != 0.0)
{
fprintf (stderr, "Error in mpfr_set_str_raw for s=0.0\n");
mpfr_clear (x);
mpfr_clear (y);
exit (1);
}
mpfr_set_str (x, "+243495834958.53452345E1", 10, GMP_RNDN);
mpfr_set_str (x, "9007199254740993", 10, GMP_RNDN);
mpfr_set_str (x, "9007199254740992", 10, GMP_RNDU);
mpfr_set_str (x, "9007199254740992", 10, GMP_RNDD);
mpfr_set_str (x, "9007199254740992", 10, GMP_RNDZ);
/* check a random number printed and read is not modified */
prec = 53;
mpfr_set_prec (x, prec);
mpfr_set_prec (y, prec);
for (i=0;i<100000;i++)
{
mpfr_random (x);
k = LONG_RAND() % 4;
logbase = (LONG_RAND() % 5) + 1;
base = 1 << logbase;
/* Warning: the number of bits needed to print exactly a number of
'prec' bits in base 2^logbase may be greater than ceil(prec/logbase),
for example 0.11E-1 in base 2 cannot be written exactly with only
one digit in base 4 */
if (base == 2)
baseprec = prec;
else
baseprec = 1 + (prec - 2 + logbase) / logbase;
str = mpfr_get_str (NULL, &e, base, baseprec, x, k);
mpfr_set_str (y, str, base, k);
MPFR_EXP(y) += logbase * (e - strlen (str));
if (mpfr_cmp (x, y))
{
fprintf (stderr, "mpfr_set_str o mpfr_get_str <> id for rnd_mode=%s\n",
mpfr_print_rnd_mode (k));
printf ("x=");
mpfr_print_binary (x);
putchar('\n');
printf ("s=%s, exp=%d, base=%d\n", str, (int) e, base);
printf ("y=");
mpfr_print_binary (y);
putchar('\n');
mpfr_clear (x);
mpfr_clear (y);
exit (1);
}
free (str);
}
mpfr_clear (x);
mpfr_clear (y);
return 0;
}
|
