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/* __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 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.
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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include <cctype>
#include <iostream>
#include <string>
#include "gmp.h"
#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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