整理

include/boost/io/detail/buffer_fill.hpp

@@ -0,0 +1,39 @@
+/*
+Copyright 2019-2020 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_IO_DETAIL_BUFFER_FILL_HPP
+#define BOOST_IO_DETAIL_BUFFER_FILL_HPP
+
+#include <iosfwd>
+#include <cstddef>
+
+namespace boost {
+namespace io {
+namespace detail {
+
+template<class charT, class traits>
+inline bool
+buffer_fill(std::basic_streambuf<charT, traits>& buf, charT ch,
+    std::size_t size)
+{
+    charT fill[] = { ch, ch, ch, ch, ch, ch, ch, ch };
+    enum {
+        chunk = sizeof fill / sizeof(charT)
+    };
+    for (; size > chunk; size -= chunk) {
+        if (static_cast<std::size_t>(buf.sputn(fill, chunk)) != chunk) {
+            return false;
+        }
+    }
+    return static_cast<std::size_t>(buf.sputn(fill, size)) == size;
+}
+
+} /* detail */
+} /* io */
+} /* boost */
+
+#endif

include/boost/io/detail/ostream_guard.hpp

@@ -0,0 +1,45 @@
+/*
+Copyright 2019-2020 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_IO_DETAIL_OSTREAM_GUARD_HPP
+#define BOOST_IO_DETAIL_OSTREAM_GUARD_HPP
+
+#include <boost/config.hpp>
+#include <iosfwd>
+
+namespace boost {
+namespace io {
+namespace detail {
+
+template<class Char, class Traits>
+class ostream_guard {
+public:
+    explicit ostream_guard(std::basic_ostream<Char, Traits>& os) BOOST_NOEXCEPT
+        : os_(&os) { }
+
+    ~ostream_guard() BOOST_NOEXCEPT_IF(false) {
+        if (os_) {
+            os_->setstate(std::basic_ostream<Char, Traits>::badbit);
+        }
+    }
+
+    void release() BOOST_NOEXCEPT {
+        os_ = 0;
+    }
+
+private:
+    ostream_guard(const ostream_guard&);
+    ostream_guard& operator=(const ostream_guard&);
+
+    std::basic_ostream<Char, Traits>* os_;
+};
+
+} /* detail */
+} /* io */
+} /* boost */
+
+#endif

include/boost/io/ios_state.hpp

@@ -0,0 +1,485 @@
+/*
+Copyright 2002, 2005 Daryle Walker
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_IO_IOS_STATE_HPP
+#define BOOST_IO_IOS_STATE_HPP
+
+#include <boost/config.hpp>
+#include <boost/io_fwd.hpp>
+#include <ios>
+#ifndef BOOST_NO_STD_LOCALE
+#include <locale>
+#endif
+#include <ostream>
+#include <streambuf>
+#include <string>
+
+namespace boost {
+namespace io {
+
+class ios_flags_saver {
+public:
+    typedef std::ios_base state_type;
+    typedef std::ios_base::fmtflags aspect_type;
+
+    explicit ios_flags_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.flags()) { }
+
+    ios_flags_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.flags(a)) { }
+
+    ~ios_flags_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.flags(a_save_);
+    }
+
+private:
+    ios_flags_saver(const ios_flags_saver&);
+    ios_flags_saver& operator=(const ios_flags_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+class ios_precision_saver {
+public:
+    typedef std::ios_base state_type;
+    typedef std::streamsize aspect_type;
+
+    explicit ios_precision_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.precision()) { }
+
+    ios_precision_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.precision(a)) { }
+
+    ~ios_precision_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.precision(a_save_);
+    }
+
+private:
+    ios_precision_saver(const ios_precision_saver&);
+    ios_precision_saver& operator=(const ios_precision_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+class ios_width_saver {
+public:
+    typedef std::ios_base state_type;
+    typedef std::streamsize aspect_type;
+
+    explicit ios_width_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.width()) { }
+
+    ios_width_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.width(a)) { }
+
+    ~ios_width_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.width(a_save_);
+    }
+
+private:
+    ios_width_saver(const ios_width_saver&);
+    ios_width_saver& operator=(const ios_width_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+template<class Ch, class Tr>
+class basic_ios_iostate_saver {
+public:
+    typedef std::basic_ios<Ch, Tr> state_type;
+    typedef std::ios_base::iostate aspect_type;
+
+    explicit basic_ios_iostate_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.rdstate()) { }
+
+    basic_ios_iostate_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.rdstate()) {
+            s.clear(a);
+        }
+
+    ~basic_ios_iostate_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.clear(a_save_);
+    }
+
+private:
+    basic_ios_iostate_saver(const basic_ios_iostate_saver&);
+    basic_ios_iostate_saver& operator=(const basic_ios_iostate_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+template<class Ch, class Tr>
+class basic_ios_exception_saver {
+public:
+    typedef std::basic_ios<Ch, Tr> state_type;
+    typedef std::ios_base::iostate aspect_type;
+
+    explicit basic_ios_exception_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.exceptions()) { }
+
+    basic_ios_exception_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.exceptions()) {
+        s.exceptions(a);
+    }
+
+    ~basic_ios_exception_saver() BOOST_NOEXCEPT_IF(false) {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.exceptions(a_save_);
+    }
+
+private:
+    basic_ios_exception_saver(const basic_ios_exception_saver&);
+    basic_ios_exception_saver& operator=(const basic_ios_exception_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+template<class Ch, class Tr>
+class basic_ios_tie_saver {
+public:
+    typedef std::basic_ios<Ch, Tr> state_type;
+    typedef std::basic_ostream<Ch, Tr>* aspect_type;
+
+    explicit basic_ios_tie_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.tie()) { }
+
+    basic_ios_tie_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.tie(a)) { }
+
+    ~basic_ios_tie_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.tie(a_save_);
+    }
+
+private:
+    basic_ios_tie_saver(const basic_ios_tie_saver&);
+    basic_ios_tie_saver& operator=(const basic_ios_tie_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+template<class Ch, class Tr>
+class basic_ios_rdbuf_saver {
+public:
+    typedef std::basic_ios<Ch, Tr> state_type;
+    typedef std::basic_streambuf<Ch, Tr>* aspect_type;
+
+    explicit basic_ios_rdbuf_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.rdbuf()) { }
+
+    basic_ios_rdbuf_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.rdbuf(a)) { }
+
+    ~basic_ios_rdbuf_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.rdbuf(a_save_);
+    }
+
+private:
+    basic_ios_rdbuf_saver(const basic_ios_rdbuf_saver&);
+    basic_ios_rdbuf_saver& operator=(const basic_ios_rdbuf_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+template<class Ch, class Tr>
+class basic_ios_fill_saver {
+public:
+    typedef std::basic_ios<Ch, Tr> state_type;
+    typedef typename state_type::char_type aspect_type;
+
+    explicit basic_ios_fill_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.fill()) { }
+
+    basic_ios_fill_saver(state_type& s, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.fill(a)) { }
+
+    ~basic_ios_fill_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.fill(a_save_);
+    }
+
+private:
+    basic_ios_fill_saver(const basic_ios_fill_saver&);
+    basic_ios_fill_saver& operator=(const basic_ios_fill_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+
+#ifndef BOOST_NO_STD_LOCALE
+template<class Ch, class Tr>
+class basic_ios_locale_saver {
+public:
+    typedef std::basic_ios<Ch, Tr> state_type;
+    typedef std::locale aspect_type;
+
+    explicit basic_ios_locale_saver(state_type& s)
+        : s_save_(s)
+        , a_save_(s.getloc()) { }
+
+    basic_ios_locale_saver(state_type& s, const aspect_type& a)
+        : s_save_(s)
+        , a_save_(s.imbue(a)) { }
+
+    ~basic_ios_locale_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.imbue(a_save_);
+    }
+
+private:
+    basic_ios_locale_saver(const basic_ios_locale_saver&);
+    basic_ios_locale_saver& operator=(const basic_ios_locale_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+};
+#endif
+
+class ios_iword_saver {
+public:
+    typedef std::ios_base state_type;
+    typedef int index_type;
+    typedef long aspect_type;
+
+    explicit ios_iword_saver(state_type& s, index_type i)
+        : s_save_(s)
+        , a_save_(s.iword(i))
+        , i_save_(i) { }
+
+    ios_iword_saver(state_type& s, index_type i, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.iword(i))
+        , i_save_(i) {
+        s.iword(i) = a;
+    }
+
+    ~ios_iword_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.iword(i_save_) = a_save_;
+    }
+
+private:
+    ios_iword_saver(const ios_iword_saver&);
+    ios_iword_saver& operator=(const ios_iword_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+    index_type i_save_;
+};
+
+class ios_pword_saver {
+public:
+    typedef std::ios_base state_type;
+    typedef int index_type;
+    typedef void* aspect_type;
+
+    explicit ios_pword_saver(state_type& s, index_type i)
+        : s_save_(s)
+        , a_save_(s.pword(i))
+        , i_save_(i) { }
+
+    ios_pword_saver(state_type& s, index_type i, aspect_type a)
+        : s_save_(s)
+        , a_save_(s.pword(i))
+        , i_save_(i) {
+        s.pword(i) = a;
+    }
+
+    ~ios_pword_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.pword(i_save_) = a_save_;
+    }
+
+private:
+    ios_pword_saver(const ios_pword_saver&);
+    ios_pword_saver operator=(const ios_pword_saver&);
+
+    state_type& s_save_;
+    aspect_type a_save_;
+    index_type i_save_;
+};
+
+class ios_base_all_saver {
+public:
+    typedef std::ios_base state_type;
+
+    explicit ios_base_all_saver(state_type& s)
+        : s_save_(s)
+        , a1_save_(s.flags())
+        , a2_save_(s.precision())
+        , a3_save_(s.width()) { }
+
+    ~ios_base_all_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.width(a3_save_);
+        s_save_.precision(a2_save_);
+        s_save_.flags(a1_save_);
+    }
+
+private:
+    ios_base_all_saver(const ios_base_all_saver&);
+    ios_base_all_saver& operator=(const ios_base_all_saver&);
+
+    state_type& s_save_;
+    state_type::fmtflags a1_save_;
+    std::streamsize a2_save_;
+    std::streamsize a3_save_;
+};
+
+template<class Ch, class Tr>
+class basic_ios_all_saver {
+public:
+    typedef std::basic_ios<Ch, Tr> state_type;
+
+    explicit basic_ios_all_saver(state_type& s)
+        : s_save_(s)
+        , a1_save_(s.flags())
+        , a2_save_(s.precision())
+        , a3_save_(s.width())
+        , a4_save_(s.rdstate())
+        , a5_save_(s.exceptions())
+        , a6_save_(s.tie())
+        , a7_save_(s.rdbuf())
+        , a8_save_(s.fill())
+#ifndef BOOST_NO_STD_LOCALE
+        , a9_save_(s.getloc())
+#endif
+        { }
+
+    ~basic_ios_all_saver() BOOST_NOEXCEPT_IF(false) {
+        this->restore();
+    }
+
+    void restore() {
+#ifndef BOOST_NO_STD_LOCALE
+        s_save_.imbue(a9_save_);
+#endif
+        s_save_.fill(a8_save_);
+        s_save_.rdbuf(a7_save_);
+        s_save_.tie(a6_save_);
+        s_save_.exceptions(a5_save_);
+        s_save_.clear(a4_save_);
+        s_save_.width(a3_save_);
+        s_save_.precision(a2_save_);
+        s_save_.flags(a1_save_);
+    }
+
+private:
+    basic_ios_all_saver(const basic_ios_all_saver&);
+    basic_ios_all_saver& operator=(const basic_ios_all_saver&);
+
+    state_type& s_save_;
+    typename state_type::fmtflags a1_save_;
+    std::streamsize a2_save_;
+    std::streamsize a3_save_;
+    typename state_type::iostate a4_save_;
+    typename state_type::iostate a5_save_;
+    std::basic_ostream<Ch, Tr>* a6_save_;
+    std::basic_streambuf<Ch, Tr>* a7_save_;
+    typename state_type::char_type a8_save_;
+#ifndef BOOST_NO_STD_LOCALE
+    std::locale a9_save_;
+#endif
+};
+
+class ios_all_word_saver {
+public:
+    typedef std::ios_base state_type;
+    typedef int index_type;
+
+    ios_all_word_saver(state_type& s, index_type i)
+        : s_save_(s)
+        , i_save_(i)
+        , a1_save_(s.iword(i))
+        , a2_save_(s.pword(i)) { }
+
+    ~ios_all_word_saver() {
+        this->restore();
+    }
+
+    void restore() {
+        s_save_.pword(i_save_) = a2_save_;
+        s_save_.iword(i_save_) = a1_save_;
+    }
+
+private:
+    ios_all_word_saver(const ios_all_word_saver&);
+    ios_all_word_saver& operator=(const ios_all_word_saver&);
+
+    state_type& s_save_;
+    index_type i_save_;
+    long a1_save_;
+    void* a2_save_;
+};
+
+} /* io */
+} /* boost */
+
+#endif

include/boost/io/nullstream.hpp

@@ -0,0 +1,63 @@
+/*
+Copyright 2021-2022 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_IO_NULLSTREAM_HPP
+#define BOOST_IO_NULLSTREAM_HPP
+
+#include <boost/config.hpp>
+#include <ostream>
+#include <streambuf>
+
+namespace boost {
+namespace io {
+
+template<class CharT, class Traits = std::char_traits<CharT> >
+class basic_nullbuf
+    : public std::basic_streambuf<CharT, Traits> {
+protected:
+    typename Traits::int_type overflow(typename Traits::int_type c)
+        BOOST_OVERRIDE {
+        return Traits::not_eof(c);
+    }
+
+    std::streamsize xsputn(const CharT*, std::streamsize n) BOOST_OVERRIDE {
+        return n;
+    }
+};
+
+namespace detail {
+
+template<class CharT, class Traits>
+class nullbuf {
+public:
+    boost::io::basic_nullbuf<CharT, Traits>* buf() {
+        return &buf_;
+    }
+
+private:
+    boost::io::basic_nullbuf<CharT, Traits> buf_;
+};
+
+} /* detail */
+
+template<class CharT, class Traits = std::char_traits<CharT> >
+class basic_onullstream
+    : detail::nullbuf<CharT, Traits>
+    , public std::basic_ostream<CharT, Traits> {
+public:
+    basic_onullstream()
+        : std::basic_ostream<CharT, Traits>(detail::nullbuf<CharT,
+             Traits>::buf()) { }
+};
+
+typedef basic_onullstream<char> onullstream;
+typedef basic_onullstream<wchar_t> wonullstream;
+
+} /* io */
+} /* boost */
+
+#endif

include/boost/io/ostream_joiner.hpp

@@ -0,0 +1,118 @@
+/*
+Copyright 2019 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_IO_OSTREAM_JOINER_HPP
+#define BOOST_IO_OSTREAM_JOINER_HPP
+
+#include <boost/config.hpp>
+#include <ostream>
+#include <string>
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+#include <type_traits>
+#endif
+#include <utility>
+#endif
+
+namespace boost {
+namespace io {
+namespace detail {
+
+#if !defined(BOOST_NO_CXX11_ADDRESSOF)
+template<class T>
+inline T*
+osj_address(T& o)
+{
+    return std::addressof(o);
+}
+#else
+template<class T>
+inline T*
+osj_address(T& obj)
+{
+    return &obj;
+}
+#endif
+
+} /* detail */
+
+template<class Delim, class Char = char,
+    class Traits = std::char_traits<Char> >
+class ostream_joiner {
+public:
+    typedef Char char_type;
+    typedef Traits traits_type;
+    typedef std::basic_ostream<Char, Traits> ostream_type;
+    typedef std::output_iterator_tag iterator_category;
+    typedef void value_type;
+    typedef void difference_type;
+    typedef void pointer;
+    typedef void reference;
+
+    ostream_joiner(ostream_type& output, const Delim& delim)
+        : output_(detail::osj_address(output))
+        , delim_(delim)
+        , first_(true) { }
+
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+    ostream_joiner(ostream_type& output, Delim&& delim)
+        : output_(detail::osj_address(output))
+        , delim_(std::move(delim))
+        , first_(true) { }
+#endif
+
+    template<class T>
+    ostream_joiner& operator=(const T& value) {
+        if (!first_) {
+            *output_ << delim_;
+        }
+        first_ = false;
+        *output_ << value;
+        return *this;
+    }
+
+    ostream_joiner& operator*() BOOST_NOEXCEPT {
+        return *this;
+    }
+
+    ostream_joiner& operator++() BOOST_NOEXCEPT {
+        return *this;
+    }
+
+    ostream_joiner& operator++(int) BOOST_NOEXCEPT {
+        return *this;
+    }
+
+private:
+    ostream_type* output_;
+    Delim delim_;
+    bool first_;
+};
+
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && \
+    !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+template<class Char, class Traits, class Delim>
+inline ostream_joiner<typename std::decay<Delim>::type, Char, Traits>
+make_ostream_joiner(std::basic_ostream<Char, Traits>& output, Delim&& delim)
+{
+    return ostream_joiner<typename std::decay<Delim>::type, Char,
+        Traits>(output, std::forward<Delim>(delim));
+}
+#else
+template<class Char, class Traits, class Delim>
+inline ostream_joiner<Delim, Char, Traits>
+make_ostream_joiner(std::basic_ostream<Char, Traits>& output,
+    const Delim& delim)
+{
+    return ostream_joiner<Delim, Char, Traits>(output, delim);
+}
+#endif
+
+} /* io */
+} /* boost */
+
+#endif

include/boost/io/ostream_put.hpp

@@ -0,0 +1,50 @@
+/*
+Copyright 2019 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_IO_OSTREAM_PUT_HPP
+#define BOOST_IO_OSTREAM_PUT_HPP
+
+#include <boost/io/detail/buffer_fill.hpp>
+#include <boost/io/detail/ostream_guard.hpp>
+
+namespace boost {
+namespace io {
+
+template<class charT, class traits>
+inline std::basic_ostream<charT, traits>&
+ostream_put(std::basic_ostream<charT, traits>& os, const charT* data,
+    std::size_t size)
+{
+    typedef std::basic_ostream<charT, traits> stream;
+    detail::ostream_guard<charT, traits> guard(os);
+    typename stream::sentry entry(os);
+    if (entry) {
+        std::basic_streambuf<charT, traits>& buf = *os.rdbuf();
+        std::size_t width = static_cast<std::size_t>(os.width());
+        if (width <= size) {
+            if (static_cast<std::size_t>(buf.sputn(data, size)) != size) {
+                return os;
+            }
+        } else if ((os.flags() & stream::adjustfield) == stream::left) {
+            if (static_cast<std::size_t>(buf.sputn(data, size)) != size ||
+                !detail::buffer_fill(buf, os.fill(), width - size)) {
+                return os;
+            }
+        } else if (!detail::buffer_fill(buf, os.fill(), width - size) ||
+            static_cast<std::size_t>(buf.sputn(data, size)) != size) {
+            return os;
+        }
+        os.width(0);
+    }
+    guard.release();
+    return os;
+}
+
+} /* io */
+} /* boost */
+
+#endif

include/boost/io/quoted.hpp

@@ -0,0 +1,217 @@
+/*
+Copyright 2010 Beman Dawes
+
+Copyright 2019-2020 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_IO_QUOTED_HPP
+#define BOOST_IO_QUOTED_HPP
+
+#include <boost/io/detail/buffer_fill.hpp>
+#include <boost/io/detail/ostream_guard.hpp>
+#include <boost/io/ios_state.hpp>
+
+namespace boost {
+namespace io {
+namespace detail {
+
+template<class String, class Char>
+struct quoted_proxy {
+    String string;
+    Char escape;
+    Char delim;
+};
+
+template<class Char>
+struct quoted_state {
+    const Char* string;
+    std::size_t size;
+    std::size_t count;
+};
+
+template<class Char>
+inline quoted_state<Char>
+quoted_start(const Char* string, Char escape, Char delim)
+{
+    const Char* end = string;
+    std::size_t count = 2;
+    for (Char ch; (ch = *end) != 0; ++end) {
+        count += 1 + (ch == escape || ch == delim);
+    }
+    quoted_state<Char> state = { string,
+        static_cast<std::size_t>(end - string), count };
+    return state;
+}
+
+template<class Char, class String>
+inline quoted_state<Char>
+quoted_start(const String* string, Char escape, Char delim)
+{
+    const Char* begin = string->data();
+    std::size_t size = string->size();
+    std::size_t count = 2;
+    for (const Char *it = begin, *end = begin + size; it != end; ++it) {
+        Char ch = *it;
+        count += 1 + (ch == escape || ch == delim);
+    }
+    quoted_state<Char> state = { begin, size, count };
+    return state;
+}
+
+template<class Char, class Traits>
+inline bool
+quoted_put(std::basic_streambuf<Char, Traits>& buf, const Char* string,
+    std::size_t size, std::size_t count, Char escape, Char delim)
+{
+    if (buf.sputc(delim) == Traits::eof()) {
+        return false;
+    }
+    if (size == count) {
+        if (static_cast<std::size_t>(buf.sputn(string, size)) != size) {
+            return false;
+        }
+    } else {
+        for (const Char* end = string + size; string != end; ++string) {
+            Char ch = *string;
+            if ((ch == escape || ch == delim) &&
+                buf.sputc(escape) == Traits::eof()) {
+                return false;
+            }
+            if (buf.sputc(ch) == Traits::eof()) {
+                return false;
+            }
+        }
+    }
+    return buf.sputc(delim) != Traits::eof();
+}
+
+template<class Char, class Traits, class String>
+inline std::basic_ostream<Char, Traits>&
+quoted_out(std::basic_ostream<Char, Traits>& os, String* string, Char escape,
+    Char delim)
+{
+    typedef std::basic_ostream<Char, Traits> stream;
+    ostream_guard<Char, Traits> guard(os);
+    typename stream::sentry entry(os);
+    if (entry) {
+        quoted_state<Char> state = boost::io::detail::quoted_start(string,
+            escape, delim);
+        std::basic_streambuf<Char, Traits>& buf = *os.rdbuf();
+        std::size_t width = static_cast<std::size_t>(os.width());
+        if (width <= state.count) {
+            if (!boost::io::detail::quoted_put(buf, state.string, state.size,
+                state.count, escape, delim)) {
+                return os;
+            }
+        } else if ((os.flags() & stream::adjustfield) == stream::left) {
+            if (!boost::io::detail::quoted_put(buf, state.string, state.size,
+                    state.count, escape, delim) ||
+                !boost::io::detail::buffer_fill(buf, os.fill(),
+                    width - state.count)) {
+                return os;
+            }
+        } else if (!boost::io::detail::buffer_fill(buf, os.fill(),
+                width - state.count) ||
+            !boost::io::detail::quoted_put(buf, state.string, state.size,
+                state.count, escape, delim)) {
+            return os;
+        }
+        os.width(0);
+    }
+    guard.release();
+    return os;
+}
+
+template<class Char, class Traits>
+inline std::basic_ostream<Char, Traits>&
+operator<<(std::basic_ostream<Char, Traits>& os,
+    const quoted_proxy<const Char*, Char>& proxy)
+{
+    return boost::io::detail::quoted_out(os, proxy.string, proxy.escape,
+        proxy.delim);
+}
+
+template <class Char, class Traits, class Alloc>
+inline std::basic_ostream<Char, Traits>&
+operator<<(std::basic_ostream<Char, Traits>& os,
+    const quoted_proxy<const std::basic_string<Char, Traits, Alloc>*,
+        Char>& proxy)
+{
+    return boost::io::detail::quoted_out(os, proxy.string, proxy.escape,
+        proxy.delim);
+}
+
+template<class Char, class Traits, class Alloc>
+inline std::basic_ostream<Char, Traits>&
+operator<<(std::basic_ostream<Char, Traits>& os,
+    const quoted_proxy<std::basic_string<Char, Traits, Alloc>*, Char>& proxy)
+{
+    return boost::io::detail::quoted_out(os, proxy.string, proxy.escape,
+        proxy.delim);
+}
+
+template<class Char, class Traits, class Alloc>
+inline std::basic_istream<Char, Traits>&
+operator>>(std::basic_istream<Char, Traits>& is,
+    const quoted_proxy<std::basic_string<Char, Traits, Alloc>*, Char>& proxy)
+{
+    Char ch;
+    if (!(is >> ch)) {
+        return is;
+    }
+    if (ch != proxy.delim) {
+        is.unget();
+        return is >> *proxy.string;
+    }
+    {
+        boost::io::ios_flags_saver ifs(is);
+        std::noskipws(is);
+        proxy.string->clear();
+        while ((is >> ch) && ch != proxy.delim) {
+            if (ch == proxy.escape && !(is >> ch)) {
+                break;
+            }
+            proxy.string->push_back(ch);
+        }
+    }
+    return is;
+}
+
+} /* detail */
+
+template<class Char, class Traits, class Alloc>
+inline detail::quoted_proxy<const std::basic_string<Char, Traits, Alloc>*,
+    Char>
+quoted(const std::basic_string<Char, Traits, Alloc>& s, Char escape='\\',
+    Char delim='\"')
+{
+    detail::quoted_proxy<const std::basic_string<Char, Traits, Alloc>*,
+        Char> proxy = { &s, escape, delim };
+    return proxy;
+}
+
+template<class Char, class Traits, class Alloc>
+inline detail::quoted_proxy<std::basic_string<Char, Traits, Alloc>*, Char>
+quoted(std::basic_string<Char, Traits, Alloc>& s, Char escape='\\',
+    Char delim='\"')
+{
+    detail::quoted_proxy<std::basic_string<Char, Traits, Alloc>*,
+        Char> proxy = { &s, escape, delim };
+    return proxy;
+}
+
+template<class Char>
+inline detail::quoted_proxy<const Char*, Char>
+quoted(const Char* s, Char escape='\\', Char delim='\"')
+{
+    detail::quoted_proxy<const Char*, Char> proxy = { s, escape, delim };
+    return proxy;
+}
+
+} /* io */
+} /* boost */
+
+#endif