/* __gmpz_operator_in_nowhite -- C++-style input of mpz_t, no whitespace skip.
Copyright 2001 , 2003 Free Software Foundation , Inc .
This file is part of the GNU MP Library .
The GNU MP Library is free software ; you can redistribute it and / or modify
it under the terms of either :
* the GNU Lesser General Public License as published by the Free
Software Foundation ; either version 3 of the License , or ( at your
option ) any later version .
or
* the GNU General Public License as published by the Free Software
Foundation ; either version 2 of the License , or ( at your option ) any
later version .
or both in parallel , as here .
The GNU MP 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 General Public License
for more details .
You should have received copies of the GNU General Public License and the
GNU Lesser General Public License along with the GNU MP Library . If not ,
see https://www.gnu.org/licenses/. */
#include <cctype>
#include <iostream>
#include <string>
#include "gmp-impl.h"
using namespace std;
// For g++ libstdc++ parsing see num_get<chartype,initer>::_M_extract_int in
// include/bits/locale_facets.tcc.
istream &
__gmpz_operator_in_nowhite (istream &i, mpz_ptr z,
char c)
{
int base;
string s;
bool ok =
false , zero, showbase;
if (c ==
'-' || c ==
'+' )
// sign
{
if (c ==
'-' )
// mpz_set_str doesn't accept '+'
s =
"-" ;
i.get(c);
}
base = __gmp_istream_set_base(i, c, zero, showbase);
// select the base
__gmp_istream_set_digits(s, i, c, ok, base);
// read the number
if (i.good())
// last character read was non-numeric
i.putback(c);
else if (i.eof() && (ok || zero))
// stopped just before eof
i.clear(ios::eofbit);
if (ok)
ASSERT_NOCARRY (mpz_set_str (z, s.c_str(), base));
// extract the number
else if (zero)
mpz_set_ui(z,
0 );
else
i.setstate(ios::failbit);
// read failed
return i;
}
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