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1 | #ifndef DATE_TIME_DATE_FORMATTING_LIMITED_HPP___ |
2 | #define DATE_TIME_DATE_FORMATTING_LIMITED_HPP___ | |
3 | ||
4 | /* Copyright (c) 2002-2004 CrystalClear Software, Inc. | |
5 | * Use, modification and distribution is subject to the | |
6 | * Boost Software License, Version 1.0. (See accompanying | |
7 | * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) | |
8 | * Author: Jeff Garland, Bart Garst | |
9 | * $Date$ | |
10 | */ | |
11 | ||
12 | #include "boost/date_time/iso_format.hpp" | |
13 | #include "boost/date_time/compiler_config.hpp" | |
14 | #include <string> | |
15 | #include <sstream> | |
16 | #include <iomanip> | |
17 | ||
18 | ||
19 | namespace boost { | |
20 | namespace date_time { | |
21 | ||
22 | //! Formats a month as as string into an ostream | |
23 | template<class month_type, class format_type> | |
24 | class month_formatter | |
25 | { | |
26 | public: | |
27 | //! Formats a month as as string into an ostream | |
28 | /*! This function demands that month_type provide | |
29 | * functions for converting to short and long strings | |
30 | * if that capability is used. | |
31 | */ | |
32 | static std::ostream& format_month(const month_type& month, | |
33 | std::ostream& os) | |
34 | { | |
35 | switch (format_type::month_format()) | |
36 | { | |
37 | case month_as_short_string: | |
38 | { | |
39 | os << month.as_short_string(); | |
40 | break; | |
41 | } | |
42 | case month_as_long_string: | |
43 | { | |
44 | os << month.as_long_string(); | |
45 | break; | |
46 | } | |
47 | case month_as_integer: | |
48 | { | |
49 | os << std::setw(2) << std::setfill('0') << month.as_number(); | |
50 | break; | |
51 | } | |
52 | ||
53 | } | |
54 | return os; | |
55 | } // format_month | |
56 | }; | |
57 | ||
58 | ||
59 | //! Convert ymd to a standard string formatting policies | |
60 | template<class ymd_type, class format_type> | |
61 | class ymd_formatter | |
62 | { | |
63 | public: | |
64 | //! Convert ymd to a standard string formatting policies | |
65 | /*! This is standard code for handling date formatting with | |
66 | * year-month-day based date information. This function | |
67 | * uses the format_type to control whether the string will | |
68 | * contain separator characters, and if so what the character | |
69 | * will be. In addtion, it can format the month as either | |
70 | * an integer or a string as controled by the formatting | |
71 | * policy | |
72 | */ | |
73 | static std::string ymd_to_string(ymd_type ymd) | |
74 | { | |
75 | typedef typename ymd_type::month_type month_type; | |
76 | std::ostringstream ss; | |
77 | ss << ymd.year; | |
78 | if (format_type::has_date_sep_chars()) { | |
79 | ss << format_type::month_sep_char(); | |
80 | } | |
81 | //this name is a bit ugly, oh well.... | |
82 | month_formatter<month_type,format_type>::format_month(ymd.month, ss); | |
83 | if (format_type::has_date_sep_chars()) { | |
84 | ss << format_type::day_sep_char(); | |
85 | } | |
86 | ss << std::setw(2) << std::setfill('0') | |
87 | << ymd.day; | |
88 | return ss.str(); | |
89 | } | |
90 | }; | |
91 | ||
92 | ||
93 | //! Convert a date to string using format policies | |
94 | template<class date_type, class format_type> | |
95 | class date_formatter | |
96 | { | |
97 | public: | |
98 | //! Convert to a date to standard string using format policies | |
99 | static std::string date_to_string(date_type d) | |
100 | { | |
101 | typedef typename date_type::ymd_type ymd_type; | |
102 | if (d.is_not_a_date()) { | |
103 | return format_type::not_a_date(); | |
104 | } | |
105 | if (d.is_neg_infinity()) { | |
106 | return format_type::neg_infinity(); | |
107 | } | |
108 | if (d.is_pos_infinity()) { | |
109 | return format_type::pos_infinity(); | |
110 | } | |
111 | ymd_type ymd = d.year_month_day(); | |
112 | return ymd_formatter<ymd_type, format_type>::ymd_to_string(ymd); | |
113 | } | |
114 | }; | |
115 | ||
116 | ||
117 | } } //namespace date_time | |
118 | ||
119 | ||
120 | #endif | |
121 |