diff options
Diffstat (limited to 'vendor/gmp-6.3.0/cxx/ismpq.cc')
-rw-r--r-- | vendor/gmp-6.3.0/cxx/ismpq.cc | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/cxx/ismpq.cc b/vendor/gmp-6.3.0/cxx/ismpq.cc new file mode 100644 index 0000000..8cd5121 --- /dev/null +++ b/vendor/gmp-6.3.0/cxx/ismpq.cc @@ -0,0 +1,66 @@ +/* operator>> -- C++-style input of mpq_t. + +Copyright 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; + + +istream & +operator>> (istream &i, mpq_ptr q) +{ + if (! (i >> mpq_numref(q))) + return i; + + char c = 0; + i.get(c); // start reading + + if (c == '/') + { + // skip slash, read denominator + i.get(c); + return __gmpz_operator_in_nowhite (i, mpq_denref(q), c); + } + else + { + // no denominator, set 1 + q->_mp_den._mp_size = 1; + q->_mp_den._mp_d[0] = 1; + if (i.good()) + i.putback(c); + else if (i.eof()) + i.clear(ios::eofbit); + } + + return i; +} |