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/* Test file for mpfr_set_str.
Copyright (C) 1999 Free Software Foundation.
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 Library General Public License as published by
the Free Software Foundation; either version 2 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the MPFR Library; see the file COPYING.LIB. 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 "gmp.h"
#include "mpfr.h"
#include "mpfr-impl.h"
#include <time.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> */
mpfr_init2(x, 53);
mpfr_set_str_raw(x, argv[1]);
printf("%1.20e\n", mpfr_get_d(x));
mpfr_clear(x);
return 0;
}
srandom(time(NULL));
if (argc > 1) { nc = atoi(argv[1]); } else { nc = 53; }
if (nc < 100) { nc = 100; }
bd = random()&8;
str2 = str = (char *) malloc (nc*sizeof(char));
if (bd)
{
for(k = 1; k <= bd; k++)
{ *(str2++) = (random() & 1) + '0'; }
}
else { *(str2++) = '0'; }
*(str2++) = '.';
for(k = 1; k < nc - 17 - bd; k++)
{
*(str2++) = '0' + (random() & 1);
}
*(str2++) = 'e';
sprintf(str2, "%d", (int) random() - (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_raw(x); putchar('\n');
mpfr_print_raw(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_d(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_d(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 = rand() % 4;
logbase = (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_raw(x); putchar('\n');
printf("s=%s, exp=%d, base=%d\n", str, (int) e, base);
printf("y="); mpfr_print_raw(y); putchar('\n');
mpfr_clear(x); mpfr_clear(y);
exit(1);
}
free(str);
}
mpfr_clear(x); mpfr_clear(y);
return 0;
}
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