[857] | 1 | #ifndef DATE_TIME_DATE_FORMATTING_HPP___
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| 2 | #define DATE_TIME_DATE_FORMATTING_HPP___
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| 3 |
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| 4 | /* Copyright (c) 2002-2004 CrystalClear Software, Inc.
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| 5 | * Use, modification and distribution is subject to the
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| 6 | * Boost Software License, Version 1.0. (See accompanying
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| 7 | * file LICENSE-1.0 or http://www.boost.org/LICENSE-1.0)
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| 8 | * Author: Jeff Garland, Bart Garst
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| 9 | * $Date: 2004/08/29 19:31:11 $
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| 10 | */
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| 11 |
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| 12 | #include "boost/date_time/iso_format.hpp"
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| 13 | #include "boost/date_time/compiler_config.hpp"
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| 14 | #include <string>
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| 15 | #include <sstream>
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| 16 | #include <iomanip>
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| 17 |
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| 18 | /* NOTE: "formatter" code for older compilers, ones that define
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| 19 | * BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS, is located in
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| 20 | * date_formatting_limited.hpp
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| 21 | */
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| 22 |
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| 23 | namespace boost {
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| 24 | namespace date_time {
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| 25 |
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| 26 | //! Formats a month as as string into an ostream
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| 27 | template<class month_type, class format_type, class charT=char>
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| 28 | class month_formatter
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| 29 | {
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| 30 | public:
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| 31 | //! Formats a month as as string into an ostream
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| 32 | /*! This function demands that month_type provide
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| 33 | * functions for converting to short and long strings
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| 34 | * if that capability is used.
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| 35 | */
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| 36 | static std::basic_ostream<charT>& format_month(const month_type& month,
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| 37 | std::basic_ostream<charT>& os)
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| 38 | {
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| 39 | switch (format_type::month_format())
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| 40 | {
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| 41 | case month_as_short_string:
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| 42 | {
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| 43 | os << month.as_short_string();
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| 44 | break;
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| 45 | }
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| 46 | case month_as_long_string:
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| 47 | {
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| 48 | os << month.as_long_string();
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| 49 | break;
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| 50 | }
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| 51 | case month_as_integer:
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| 52 | {
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| 53 | os << std::setw(2) << std::setfill(os.widen('0')) << month.as_number();
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| 54 | break;
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| 55 | }
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| 56 |
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| 57 | }
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| 58 | return os;
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| 59 | } // format_month
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| 60 | };
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| 61 |
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| 62 |
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| 63 | //! Convert ymd to a standard string formatting policies
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| 64 | template<class ymd_type, class format_type, class charT=char>
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| 65 | class ymd_formatter
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| 66 | {
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| 67 | public:
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| 68 | //! Convert ymd to a standard string formatting policies
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| 69 | /*! This is standard code for handling date formatting with
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| 70 | * year-month-day based date information. This function
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| 71 | * uses the format_type to control whether the string will
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| 72 | * contain separator characters, and if so what the character
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| 73 | * will be. In addtion, it can format the month as either
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| 74 | * an integer or a string as controled by the formatting
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| 75 | * policy
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| 76 | */
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| 77 | static std::basic_string<charT> ymd_to_string(ymd_type ymd)
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| 78 | {
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| 79 | typedef typename ymd_type::month_type month_type;
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| 80 | std::basic_ostringstream<charT> ss;
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| 81 | ss << ymd.year;
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| 82 | if (format_type::has_date_sep_chars()) {
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| 83 | ss << format_type::month_sep_char();
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| 84 | }
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| 85 | //this name is a bit ugly, oh well....
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| 86 | month_formatter<month_type,format_type,charT>::format_month(ymd.month, ss);
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| 87 | if (format_type::has_date_sep_chars()) {
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| 88 | ss << format_type::day_sep_char();
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| 89 | }
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| 90 | ss << std::setw(2) << std::setfill(ss.widen('0'))
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| 91 | << ymd.day;
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| 92 | return ss.str();
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| 93 | }
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| 94 | };
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| 95 |
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| 96 |
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| 97 | //! Convert a date to string using format policies
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| 98 | template<class date_type, class format_type, class charT=char>
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| 99 | class date_formatter
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| 100 | {
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| 101 | public:
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| 102 | typedef std::basic_string<charT> string_type;
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| 103 | //! Convert to a date to standard string using format policies
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| 104 | static string_type date_to_string(date_type d)
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| 105 | {
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| 106 | typedef typename date_type::ymd_type ymd_type;
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| 107 | if (d.is_not_a_date()) {
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| 108 | return string_type(format_type::not_a_date());
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| 109 | }
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| 110 | if (d.is_neg_infinity()) {
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| 111 | return string_type(format_type::neg_infinity());
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| 112 | }
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| 113 | if (d.is_pos_infinity()) {
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| 114 | return string_type(format_type::pos_infinity());
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| 115 | }
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| 116 | ymd_type ymd = d.year_month_day();
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| 117 | return ymd_formatter<ymd_type, format_type, charT>::ymd_to_string(ymd);
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| 118 | }
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| 119 | };
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| 120 |
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| 121 |
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| 122 | } } //namespace date_time
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| 123 |
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| 124 |
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| 125 | #endif
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| 126 |
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