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/*
Copyright (C) 2019 Julian Rüth
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "arf.h"
static void
arf_set_fmpz_2exp_dump(arf_t x, const fmpz_t m, const fmpz_t e) {
if (fmpz_is_zero(m)) {
if (fmpz_get_si(e) == 0) arf_zero(x);
else if (fmpz_get_si(e) == -1) arf_pos_inf(x);
else if (fmpz_get_si(e) == -2) arf_neg_inf(x);
else if (fmpz_get_si(e) == -3) arf_nan(x);
else {
/* Impossible to happen; all the special values have been treated above. */
flint_abort();
}
return;
}
arf_set_fmpz_2exp(x, m, e);
}
int
arf_load_str(arf_t x, const char* data)
{
fmpz_t mantissa, exponent;
char * e_str;
char * m_str;
int err = 0;
fmpz_init(mantissa);
fmpz_init(exponent);
e_str = strchr(data, ' ');
if (e_str == NULL) return 1;
m_str = (char*)flint_malloc(e_str - data + 1);
strncpy(m_str, data, e_str - data);
m_str[e_str - data] = '\0';
e_str++;
err = fmpz_set_str(mantissa, m_str, 16);
flint_free(m_str);
if (err)
{
fmpz_clear(exponent);
fmpz_clear(mantissa);
return err;
}
err = fmpz_set_str(exponent, e_str, 16);
if (err)
{
fmpz_clear(exponent);
fmpz_clear(mantissa);
return err;
}
arf_set_fmpz_2exp_dump(x, mantissa, exponent);
fmpz_clear(exponent);
fmpz_clear(mantissa);
return err;
}
int arf_load_file(arf_t x, FILE* stream)
{
mpz_t mantissa, exponent;
fmpz_t mantissa_, exponent_;
mpz_init(mantissa);
mpz_init(exponent);
if (mpz_inp_str(mantissa, stream, 16) == 0) return 1;
if (mpz_inp_str(exponent, stream, 16) == 0) return 1;
fmpz_init_set_readonly(mantissa_, mantissa);
fmpz_init_set_readonly(exponent_, exponent);
arf_set_fmpz_2exp_dump(x, mantissa_, exponent_);
mpz_clear(mantissa);
mpz_clear(exponent);
return 0;
}
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