/*
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Copyright 2002, 2005 Daryle Walker
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Distributed under the Boost Software License, Version 1.0.
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(http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_IO_IOS_STATE_HPP
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#define BOOST_IO_IOS_STATE_HPP
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#include <boost/config.hpp>
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#include <boost/io_fwd.hpp>
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#include <ios>
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#ifndef BOOST_NO_STD_LOCALE
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#include <locale>
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#endif
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#include <ostream>
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#include <streambuf>
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#include <string>
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namespace boost {
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namespace io {
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class ios_flags_saver {
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public:
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typedef std::ios_base state_type;
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typedef std::ios_base::fmtflags aspect_type;
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explicit ios_flags_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.flags()) { }
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ios_flags_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.flags(a)) { }
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~ios_flags_saver() {
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this->restore();
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}
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void restore() {
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s_save_.flags(a_save_);
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}
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private:
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ios_flags_saver(const ios_flags_saver&);
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ios_flags_saver& operator=(const ios_flags_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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class ios_precision_saver {
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public:
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typedef std::ios_base state_type;
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typedef std::streamsize aspect_type;
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explicit ios_precision_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.precision()) { }
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ios_precision_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.precision(a)) { }
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~ios_precision_saver() {
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this->restore();
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}
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void restore() {
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s_save_.precision(a_save_);
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}
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private:
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ios_precision_saver(const ios_precision_saver&);
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ios_precision_saver& operator=(const ios_precision_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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class ios_width_saver {
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public:
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typedef std::ios_base state_type;
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typedef std::streamsize aspect_type;
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explicit ios_width_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.width()) { }
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ios_width_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.width(a)) { }
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~ios_width_saver() {
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this->restore();
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}
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void restore() {
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s_save_.width(a_save_);
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}
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private:
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ios_width_saver(const ios_width_saver&);
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ios_width_saver& operator=(const ios_width_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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template<class Ch, class Tr>
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class basic_ios_iostate_saver {
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public:
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typedef std::basic_ios<Ch, Tr> state_type;
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typedef std::ios_base::iostate aspect_type;
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explicit basic_ios_iostate_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.rdstate()) { }
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basic_ios_iostate_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.rdstate()) {
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s.clear(a);
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}
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~basic_ios_iostate_saver() {
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this->restore();
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}
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void restore() {
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s_save_.clear(a_save_);
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}
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private:
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basic_ios_iostate_saver(const basic_ios_iostate_saver&);
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basic_ios_iostate_saver& operator=(const basic_ios_iostate_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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template<class Ch, class Tr>
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class basic_ios_exception_saver {
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public:
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typedef std::basic_ios<Ch, Tr> state_type;
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typedef std::ios_base::iostate aspect_type;
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explicit basic_ios_exception_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.exceptions()) { }
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basic_ios_exception_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.exceptions()) {
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s.exceptions(a);
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}
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~basic_ios_exception_saver() {
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this->restore();
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}
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void restore() {
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s_save_.exceptions(a_save_);
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}
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private:
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basic_ios_exception_saver(const basic_ios_exception_saver&);
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basic_ios_exception_saver& operator=(const basic_ios_exception_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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template<class Ch, class Tr>
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class basic_ios_tie_saver {
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public:
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typedef std::basic_ios<Ch, Tr> state_type;
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typedef std::basic_ostream<Ch, Tr>* aspect_type;
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explicit basic_ios_tie_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.tie()) { }
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basic_ios_tie_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.tie(a)) { }
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~basic_ios_tie_saver() {
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this->restore();
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}
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void restore() {
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s_save_.tie(a_save_);
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}
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private:
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basic_ios_tie_saver(const basic_ios_tie_saver&);
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basic_ios_tie_saver& operator=(const basic_ios_tie_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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template<class Ch, class Tr>
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class basic_ios_rdbuf_saver {
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public:
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typedef std::basic_ios<Ch, Tr> state_type;
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typedef std::basic_streambuf<Ch, Tr>* aspect_type;
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explicit basic_ios_rdbuf_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.rdbuf()) { }
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basic_ios_rdbuf_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.rdbuf(a)) { }
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~basic_ios_rdbuf_saver() {
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this->restore();
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}
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void restore() {
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s_save_.rdbuf(a_save_);
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}
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private:
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basic_ios_rdbuf_saver(const basic_ios_rdbuf_saver&);
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basic_ios_rdbuf_saver& operator=(const basic_ios_rdbuf_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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template<class Ch, class Tr>
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class basic_ios_fill_saver {
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public:
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typedef std::basic_ios<Ch, Tr> state_type;
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typedef typename state_type::char_type aspect_type;
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explicit basic_ios_fill_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.fill()) { }
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basic_ios_fill_saver(state_type& s, aspect_type a)
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: s_save_(s)
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, a_save_(s.fill(a)) { }
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~basic_ios_fill_saver() {
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this->restore();
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}
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void restore() {
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s_save_.fill(a_save_);
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}
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private:
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basic_ios_fill_saver(const basic_ios_fill_saver&);
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basic_ios_fill_saver& operator=(const basic_ios_fill_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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#ifndef BOOST_NO_STD_LOCALE
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template<class Ch, class Tr>
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class basic_ios_locale_saver {
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public:
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typedef std::basic_ios<Ch, Tr> state_type;
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typedef std::locale aspect_type;
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explicit basic_ios_locale_saver(state_type& s)
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: s_save_(s)
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, a_save_(s.getloc()) { }
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basic_ios_locale_saver(state_type& s, const aspect_type& a)
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: s_save_(s)
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, a_save_(s.imbue(a)) { }
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~basic_ios_locale_saver() {
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this->restore();
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}
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void restore() {
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s_save_.imbue(a_save_);
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}
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private:
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basic_ios_locale_saver(const basic_ios_locale_saver&);
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basic_ios_locale_saver& operator=(const basic_ios_locale_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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};
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#endif
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class ios_iword_saver {
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public:
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typedef std::ios_base state_type;
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typedef int index_type;
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typedef long aspect_type;
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explicit ios_iword_saver(state_type& s, index_type i)
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: s_save_(s)
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, a_save_(s.iword(i))
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, i_save_(i) { }
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ios_iword_saver(state_type& s, index_type i, aspect_type a)
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: s_save_(s)
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, a_save_(s.iword(i))
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, i_save_(i) {
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s.iword(i) = a;
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}
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~ios_iword_saver() {
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this->restore();
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}
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void restore() {
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s_save_.iword(i_save_) = a_save_;
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}
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private:
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ios_iword_saver(const ios_iword_saver&);
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ios_iword_saver& operator=(const ios_iword_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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index_type i_save_;
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};
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class ios_pword_saver {
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public:
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typedef std::ios_base state_type;
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typedef int index_type;
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typedef void* aspect_type;
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explicit ios_pword_saver(state_type& s, index_type i)
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: s_save_(s)
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, a_save_(s.pword(i))
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, i_save_(i) { }
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ios_pword_saver(state_type& s, index_type i, aspect_type a)
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: s_save_(s)
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, a_save_(s.pword(i))
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, i_save_(i) {
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s.pword(i) = a;
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}
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~ios_pword_saver() {
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this->restore();
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}
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void restore() {
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s_save_.pword(i_save_) = a_save_;
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}
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private:
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ios_pword_saver(const ios_pword_saver&);
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ios_pword_saver operator=(const ios_pword_saver&);
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state_type& s_save_;
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aspect_type a_save_;
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index_type i_save_;
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};
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class ios_base_all_saver {
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public:
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typedef std::ios_base state_type;
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explicit ios_base_all_saver(state_type& s)
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: s_save_(s)
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, a1_save_(s.flags())
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, a2_save_(s.precision())
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, a3_save_(s.width()) { }
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~ios_base_all_saver() {
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this->restore();
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}
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void restore() {
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s_save_.width(a3_save_);
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s_save_.precision(a2_save_);
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s_save_.flags(a1_save_);
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}
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private:
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ios_base_all_saver(const ios_base_all_saver&);
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ios_base_all_saver& operator=(const ios_base_all_saver&);
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state_type& s_save_;
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state_type::fmtflags a1_save_;
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std::streamsize a2_save_;
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std::streamsize a3_save_;
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};
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template<class Ch, class Tr>
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class basic_ios_all_saver {
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public:
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typedef std::basic_ios<Ch, Tr> state_type;
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explicit basic_ios_all_saver(state_type& s)
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: s_save_(s)
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, a1_save_(s.flags())
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, a2_save_(s.precision())
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, a3_save_(s.width())
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, a4_save_(s.rdstate())
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, a5_save_(s.exceptions())
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, a6_save_(s.tie())
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, a7_save_(s.rdbuf())
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, a8_save_(s.fill())
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#ifndef BOOST_NO_STD_LOCALE
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, a9_save_(s.getloc())
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#endif
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{ }
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~basic_ios_all_saver() {
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this->restore();
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}
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void restore() {
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#ifndef BOOST_NO_STD_LOCALE
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s_save_.imbue(a9_save_);
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#endif
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s_save_.fill(a8_save_);
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s_save_.rdbuf(a7_save_);
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s_save_.tie(a6_save_);
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s_save_.exceptions(a5_save_);
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s_save_.clear(a4_save_);
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s_save_.width(a3_save_);
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s_save_.precision(a2_save_);
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s_save_.flags(a1_save_);
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}
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private:
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basic_ios_all_saver(const basic_ios_all_saver&);
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basic_ios_all_saver& operator=(const basic_ios_all_saver&);
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state_type& s_save_;
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typename state_type::fmtflags a1_save_;
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std::streamsize a2_save_;
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std::streamsize a3_save_;
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typename state_type::iostate a4_save_;
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typename state_type::iostate a5_save_;
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std::basic_ostream<Ch, Tr>* a6_save_;
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std::basic_streambuf<Ch, Tr>* a7_save_;
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typename state_type::char_type a8_save_;
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#ifndef BOOST_NO_STD_LOCALE
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std::locale a9_save_;
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#endif
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};
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class ios_all_word_saver {
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public:
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typedef std::ios_base state_type;
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typedef int index_type;
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ios_all_word_saver(state_type& s, index_type i)
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: s_save_(s)
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, i_save_(i)
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, a1_save_(s.iword(i))
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, a2_save_(s.pword(i)) { }
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~ios_all_word_saver() {
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this->restore();
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}
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void restore() {
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s_save_.pword(i_save_) = a2_save_;
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s_save_.iword(i_save_) = a1_save_;
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}
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private:
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ios_all_word_saver(const ios_all_word_saver&);
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ios_all_word_saver& operator=(const ios_all_word_saver&);
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state_type& s_save_;
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index_type i_save_;
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long a1_save_;
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void* a2_save_;
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};
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} /* io */
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} /* boost */
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#endif
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