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4c74403188
Change-Id: Iae65e95cfa0d92091b8b0a424ae36d88efa76aa9 Reviewed-on: https://review.haiku-os.org/c/buildtools/+/3020 Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/* __gmpz_operator_in_nowhite -- C++-style input of mpz_t, no whitespace skip.
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Copyright 2001, 2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any
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later version.
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or both in parallel, as here.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received copies of the GNU General Public License and the
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GNU Lesser General Public License along with the GNU MP Library. If not,
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see https://www.gnu.org/licenses/. */
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#include <cctype>
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#include <iostream>
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#include <string>
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#include "gmp-impl.h"
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using namespace std;
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// For g++ libstdc++ parsing see num_get<chartype,initer>::_M_extract_int in
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// include/bits/locale_facets.tcc.
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istream &
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__gmpz_operator_in_nowhite (istream &i, mpz_ptr z, char c)
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{
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int base;
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string s;
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bool ok = false, zero, showbase;
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if (c == '-' || c == '+') // sign
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{
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if (c == '-') // mpz_set_str doesn't accept '+'
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s = "-";
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i.get(c);
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}
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base = __gmp_istream_set_base(i, c, zero, showbase); // select the base
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__gmp_istream_set_digits(s, i, c, ok, base); // read the number
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if (i.good()) // last character read was non-numeric
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i.putback(c);
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else if (i.eof() && (ok || zero)) // stopped just before eof
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i.clear(ios::eofbit);
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if (ok)
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ASSERT_NOCARRY (mpz_set_str (z, s.c_str(), base)); // extract the number
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else if (zero)
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mpz_set_ui(z, 0);
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else
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i.setstate(ios::failbit); // read failed
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return i;
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}
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