mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2013 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_BITSET_IO_HPP
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#define SPROUT_BITSET_IO_HPP
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#include <cstddef>
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#include <string>
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#include <iosfwd>
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#include <sprout/config.hpp>
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#include <sprout/bitset/bitset.hpp>
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namespace sprout {
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// 20.5.4 bitset operators:
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template<typename Char, typename Traits, std::size_t N>
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inline SPROUT_NON_CONSTEXPR std::basic_istream<Char, Traits>&
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operator>>(std::basic_istream<Char, Traits>& lhs, sprout::bitset<N>& rhs) {
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typedef typename Traits::char_type char_type;
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typedef std::basic_istream<Char, Traits> istream_type;
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typedef typename istream_type::ios_base ios_base;
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std::basic_string<Char, Traits> tmp;
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tmp.reserve(N);
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char_type const zero = lhs.widen('0');
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char_type const one = lhs.widen('1');
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typename ios_base::iostate state = ios_base::goodbit;
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typename istream_type::sentry sentry(lhs);
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if (sentry) {
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try {
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for (std::size_t i = N; i > 0; --i) {
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static typename Traits::int_type eof = Traits::eof();
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typename Traits::int_type c1 = lhs.rdbuf()->sbumpc();
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if (Traits::eq_int_type(c1, eof)) {
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state |= ios_base::eofbit;
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break;
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} else {
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char_type const c2 = Traits::to_char_type(c1);
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if (Traits::eq(c2, zero)) {
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tmp.push_back(zero);
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} else if (Traits::eq(c2, one)) {
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tmp.push_back(one);
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} else if (Traits::eq_int_type(lhs.rdbuf()->sputbackc(c2), eof)) {
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state |= ios_base::failbit;
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break;
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}
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}
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}
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} catch(...) {
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lhs.setstate(ios_base::badbit);
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}
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}
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if (tmp.empty() && N) {
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state |= ios_base::failbit;
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} else {
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rhs.copy_from_string(tmp, static_cast<std::size_t>(0), N, zero, one);
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if (state) {
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lhs.setstate(state);
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return lhs;
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}
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}
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return lhs;
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}
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template<typename Char, typename Traits, std::size_t N>
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inline SPROUT_NON_CONSTEXPR std::basic_ostream<Char, Traits>&
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operator<<(std::basic_ostream<Char, Traits>& lhs, sprout::bitset<N> const& rhs) {
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std::basic_string<Char, Traits> tmp;
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std::ctype<Char> const& ct = std::use_facet<std::ctype<Char> >(lhs.getloc());
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rhs.copy_to_string(tmp, ct.widen('0'), ct.widen('1'));
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return lhs << tmp;
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_BITSET_IO_HPP
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