formatting.hpp

//
// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
//
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt

#ifndef BOOST_LOCALE_FORMATTING_HPP_INCLUDED
#define BOOST_LOCALE_FORMATTING_HPP_INCLUDED

#include <boost/locale/config.hpp>
#include <boost/locale/time_zone.hpp>
#include <boost/locale/util/string.hpp>
#include <boost/assert.hpp>
#include <boost/cstdint.hpp>
#include <cstring>
#include <istream>
#include <ostream>
#include <string>
#include <typeinfo>

#ifdef BOOST_MSVC
#    pragma warning(push)
#    pragma warning(disable : 4275 4251 4231 4660)
#endif

namespace boost { namespace locale {

    namespace flags {

        enum display_flags_type {
            posix = 0,
            number = 1,
            currency = 2,
            percent = 3,
            date = 4,
            time = 5,
            datetime = 6,
            strftime = 7,
            spellout = 8,
            ordinal = 9,

            display_flags_mask = 31,

            currency_default = 0 << 5,
            currency_iso = 1 << 5,
            currency_national = 2 << 5,

            currency_flags_mask = 3 << 5,

            time_default = 0 << 7,
            time_short = 1 << 7,
            time_medium = 2 << 7,
            time_long = 3 << 7,
            time_full = 4 << 7,
            time_flags_mask = 7 << 7,

            date_default = 0 << 10,
            date_short = 1 << 10,
            date_medium = 2 << 10,
            date_long = 3 << 10,
            date_full = 4 << 10,
            date_flags_mask = 7 << 10,
        };

        enum pattern_type {
            datetime_pattern, 
            time_zone_id      
        };

        enum value_type {
            domain_id 
        };

    } // namespace flags

    class BOOST_LOCALE_DECL ios_info {
    public:
        ios_info();
        ios_info(const ios_info&);
        ios_info& operator=(const ios_info&);
        ~ios_info();

        static ios_info& get(std::ios_base& ios);

        void display_flags(uint64_t flags);
        uint64_t display_flags() const;

        void currency_flags(uint64_t flags);
        uint64_t currency_flags() const;

        void date_flags(uint64_t flags);
        uint64_t date_flags() const;

        void time_flags(uint64_t flags);
        uint64_t time_flags() const;

        void domain_id(int);
        int domain_id() const;

        void time_zone(const std::string&);
        std::string time_zone() const;

        template<typename CharType>
        void date_time_pattern(const std::basic_string<CharType>& str)
        {
            string_set& s = date_time_pattern_set();
            s.set(str.c_str());
        }
        template<typename CharType>
        std::basic_string<CharType> date_time_pattern() const
        {
            const string_set& s = date_time_pattern_set();
            return s.get<CharType>();
        }

        void on_imbue();

    private:
        class string_set;

        const string_set& date_time_pattern_set() const;
        string_set& date_time_pattern_set();

        class BOOST_LOCALE_DECL string_set {
        public:
            string_set();
            ~string_set();
            string_set(const string_set& other);
            string_set& operator=(string_set other);
            void swap(string_set& other);

            template<typename Char>
            void set(const Char* s)
            {
                BOOST_ASSERT(s);
                delete[] ptr;
                ptr = nullptr;
                type = &typeid(Char);
                size = sizeof(Char) * (util::str_end(s) - s + 1);
                ptr = new char[size];
                memcpy(ptr, s, size);
            }

            template<typename Char>
            std::basic_string<Char> get() const
            {
                if(type == 0 || *type != typeid(Char))
                    throw std::bad_cast();
                std::basic_string<Char> result = reinterpret_cast<const Char*>(ptr);
                return result;
            }

        private:
            const std::type_info* type;
            size_t size;
            char* ptr;
        };

        uint64_t flags_;
        int domain_id_;
        std::string time_zone_;
        string_set datetime_;
    };

    namespace as {

        inline std::ios_base& posix(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::posix);
            return ios;
        }

        inline std::ios_base& number(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::number);
            return ios;
        }

        inline std::ios_base& currency(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::currency);
            return ios;
        }

        inline std::ios_base& percent(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::percent);
            return ios;
        }

        inline std::ios_base& date(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::date);
            return ios;
        }

        inline std::ios_base& time(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::time);
            return ios;
        }

        inline std::ios_base& datetime(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::datetime);
            return ios;
        }

        inline std::ios_base& strftime(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::strftime);
            return ios;
        }

        inline std::ios_base& spellout(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::spellout);
            return ios;
        }

        inline std::ios_base& ordinal(std::ios_base& ios)
        {
            ios_info::get(ios).display_flags(flags::ordinal);
            return ios;
        }

        inline std::ios_base& currency_default(std::ios_base& ios)
        {
            ios_info::get(ios).currency_flags(flags::currency_default);
            return ios;
        }

        inline std::ios_base& currency_iso(std::ios_base& ios)
        {
            ios_info::get(ios).currency_flags(flags::currency_iso);
            return ios;
        }

        inline std::ios_base& currency_national(std::ios_base& ios)
        {
            ios_info::get(ios).currency_flags(flags::currency_national);
            return ios;
        }

        inline std::ios_base& time_default(std::ios_base& ios)
        {
            ios_info::get(ios).time_flags(flags::time_default);
            return ios;
        }

        inline std::ios_base& time_short(std::ios_base& ios)
        {
            ios_info::get(ios).time_flags(flags::time_short);
            return ios;
        }

        inline std::ios_base& time_medium(std::ios_base& ios)
        {
            ios_info::get(ios).time_flags(flags::time_medium);
            return ios;
        }

        inline std::ios_base& time_long(std::ios_base& ios)
        {
            ios_info::get(ios).time_flags(flags::time_long);
            return ios;
        }

        inline std::ios_base& time_full(std::ios_base& ios)
        {
            ios_info::get(ios).time_flags(flags::time_full);
            return ios;
        }

        inline std::ios_base& date_default(std::ios_base& ios)
        {
            ios_info::get(ios).date_flags(flags::date_default);
            return ios;
        }

        inline std::ios_base& date_short(std::ios_base& ios)
        {
            ios_info::get(ios).date_flags(flags::date_short);
            return ios;
        }

        inline std::ios_base& date_medium(std::ios_base& ios)
        {
            ios_info::get(ios).date_flags(flags::date_medium);
            return ios;
        }

        inline std::ios_base& date_long(std::ios_base& ios)
        {
            ios_info::get(ios).date_flags(flags::date_long);
            return ios;
        }

        inline std::ios_base& date_full(std::ios_base& ios)
        {
            ios_info::get(ios).date_flags(flags::date_full);
            return ios;
        }

        namespace detail {
            template<typename CharType>
            struct add_ftime {
                std::basic_string<CharType> ftime;

                void apply(std::basic_ios<CharType>& ios) const
                {
                    ios_info::get(ios).date_time_pattern(ftime);
                    as::strftime(ios);
                }
            };

            template<typename CharType>
            std::basic_ostream<CharType>& operator<<(std::basic_ostream<CharType>& out, const add_ftime<CharType>& fmt)
            {
                fmt.apply(out);
                return out;
            }

            template<typename CharType>
            std::basic_istream<CharType>& operator>>(std::basic_istream<CharType>& in, const add_ftime<CharType>& fmt)
            {
                fmt.apply(in);
                return in;
            }

        } // namespace detail


        template<typename CharType>
#ifdef BOOST_LOCALE_DOXYGEN
        unspecified_type
#else
        detail::add_ftime<CharType>
#endif
        ftime(const std::basic_string<CharType>& format)
        {
            detail::add_ftime<CharType> fmt;
            fmt.ftime = format;
            return fmt;
        }

        template<typename CharType>
#ifdef BOOST_LOCALE_DOXYGEN
        unspecified_type
#else
        detail::add_ftime<CharType>
#endif
        ftime(const CharType* format)
        {
            detail::add_ftime<CharType> fmt;
            fmt.ftime = format;
            return fmt;
        }

        namespace detail {
            struct set_timezone {
                std::string id;
            };
            template<typename CharType>
            std::basic_ostream<CharType>& operator<<(std::basic_ostream<CharType>& out, const set_timezone& fmt)
            {
                ios_info::get(out).time_zone(fmt.id);
                return out;
            }

            template<typename CharType>
            std::basic_istream<CharType>& operator>>(std::basic_istream<CharType>& in, const set_timezone& fmt)
            {
                ios_info::get(in).time_zone(fmt.id);
                return in;
            }
        } // namespace detail

        inline std::ios_base& gmt(std::ios_base& ios)
        {
            ios_info::get(ios).time_zone("GMT");
            return ios;
        }

        inline std::ios_base& local_time(std::ios_base& ios)
        {
            ios_info::get(ios).time_zone(time_zone::global());
            return ios;
        }

        inline
#ifdef BOOST_LOCALE_DOXYGEN
          unspecified_type
#else
          detail::set_timezone
#endif
          time_zone(const char* id)
        {
            detail::set_timezone tz;
            tz.id = id;
            return tz;
        }

        inline
#ifdef BOOST_LOCALE_DOXYGEN
          unspecified_type
#else
          detail::set_timezone
#endif
          time_zone(const std::string& id)
        {
            detail::set_timezone tz;
            tz.id = id;
            return tz;
        }


    } // namespace as

}} // namespace boost::locale

#ifdef BOOST_MSVC
#    pragma warning(pop)
#endif

#endif