1 | #ifndef GREG_MONTH_HPP___ |
2 | #define GREG_MONTH_HPP___ |
3 | |
4 | /* Copyright (c) 2002,2003, 2020 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/constrained_value.hpp> |
13 | #include <boost/date_time/date_defs.hpp> |
14 | #include <boost/date_time/compiler_config.hpp> |
15 | #include <stdexcept> |
16 | #include <string> |
17 | |
18 | namespace boost { |
19 | namespace gregorian { |
20 | |
21 | typedef date_time::months_of_year months_of_year; |
22 | |
23 | //bring enum values into the namespace |
24 | using date_time::Jan; |
25 | using date_time::Feb; |
26 | using date_time::Mar; |
27 | using date_time::Apr; |
28 | using date_time::May; |
29 | using date_time::Jun; |
30 | using date_time::Jul; |
31 | using date_time::Aug; |
32 | using date_time::Sep; |
33 | using date_time::Oct; |
34 | using date_time::Nov; |
35 | using date_time::Dec; |
36 | using date_time::NotAMonth; |
37 | using date_time::NumMonths; |
38 | |
39 | //! Exception thrown if a greg_month is constructed with a value out of range |
40 | struct BOOST_SYMBOL_VISIBLE bad_month : public std::out_of_range |
41 | { |
42 | bad_month() : std::out_of_range(std::string("Month number is out of range 1..12" )) {} |
43 | }; |
44 | //! Build a policy class for the greg_month_rep |
45 | typedef CV::simple_exception_policy<unsigned short, 1, 12, bad_month> greg_month_policies; |
46 | //! A constrained range that implements the gregorian_month rules |
47 | typedef CV::constrained_value<greg_month_policies> greg_month_rep; |
48 | |
49 | |
50 | //! Wrapper class to represent months in gregorian based calendar |
51 | class BOOST_SYMBOL_VISIBLE greg_month : public greg_month_rep { |
52 | public: |
53 | typedef date_time::months_of_year month_enum; |
54 | |
55 | //! Construct a month from the months_of_year enumeration |
56 | BOOST_CXX14_CONSTEXPR greg_month(month_enum theMonth) : |
57 | greg_month_rep(static_cast<greg_month_rep::value_type>(theMonth)) {} |
58 | //! Construct from a short value |
59 | BOOST_CXX14_CONSTEXPR greg_month(value_type theMonth) : greg_month_rep(theMonth) {} |
60 | //! Convert the value back to a short |
61 | BOOST_CXX14_CONSTEXPR operator value_type() const {return value_;} |
62 | //! Returns month as number from 1 to 12 |
63 | BOOST_CXX14_CONSTEXPR value_type as_number() const {return value_;} |
64 | BOOST_CXX14_CONSTEXPR month_enum as_enum() const {return static_cast<month_enum>(value_);} |
65 | |
66 | //! Returns 3 char english string for the month ex: Jan, Feb, Mar, Apr |
67 | const char* |
68 | as_short_string() const |
69 | { |
70 | static const char* const short_month_names[NumMonths] |
71 | = {"Jan" ,"Feb" ,"Mar" ,"Apr" ,"May" ,"Jun" ,"Jul" ,"Aug" ,"Sep" ,"Oct" ,"Nov" ,"Dec" , "NAM" }; |
72 | return short_month_names[value_-1]; |
73 | } |
74 | |
75 | //! Returns full name of month as string in english ex: January, February |
76 | const char* |
77 | as_long_string() const |
78 | { |
79 | static const char* const long_month_names[NumMonths] |
80 | = {"January" ,"February" ,"March" ,"April" ,"May" ,"June" ,"July" ,"August" , |
81 | "September" ,"October" ,"November" ,"December" ,"NotAMonth" }; |
82 | return long_month_names[value_-1]; |
83 | } |
84 | |
85 | #ifndef BOOST_NO_STD_WSTRING |
86 | |
87 | //! Returns 3 wchar_t english string for the month ex: Jan, Feb, Mar, Apr |
88 | const wchar_t* |
89 | as_short_wstring() const |
90 | { |
91 | static const wchar_t* const w_short_month_names[NumMonths] |
92 | = {L"Jan" ,L"Feb" ,L"Mar" ,L"Apr" ,L"May" ,L"Jun" ,L"Jul" ,L"Aug" ,L"Sep" ,L"Oct" , |
93 | L"Nov" ,L"Dec" ,L"NAM" }; |
94 | return w_short_month_names[value_-1]; |
95 | } |
96 | |
97 | //! Returns full name of month as wchar_t string in english ex: January, February |
98 | const wchar_t* |
99 | as_long_wstring() const |
100 | { |
101 | static const wchar_t* const w_long_month_names[NumMonths] |
102 | = {L"January" ,L"February" ,L"March" ,L"April" ,L"May" ,L"June" ,L"July" ,L"August" , |
103 | L"September" ,L"October" ,L"November" ,L"December" ,L"NotAMonth" }; |
104 | return w_long_month_names[value_-1]; |
105 | } |
106 | |
107 | #endif // BOOST_NO_STD_WSTRING |
108 | |
109 | /* parameterized as_*_string functions are intended to be called |
110 | * from a template function: "... as_short_string(charT c='\0');" */ |
111 | const char* as_short_string(char) const |
112 | { |
113 | return as_short_string(); |
114 | } |
115 | const char* as_long_string(char) const |
116 | { |
117 | return as_long_string(); |
118 | } |
119 | #ifndef BOOST_NO_STD_WSTRING |
120 | const wchar_t* as_short_string(wchar_t) const |
121 | { |
122 | return as_short_wstring(); |
123 | } |
124 | const wchar_t* as_long_string(wchar_t) const |
125 | { |
126 | return as_long_wstring(); |
127 | } |
128 | #endif // BOOST_NO_STD_WSTRING |
129 | }; |
130 | |
131 | } } //namespace gregorian |
132 | |
133 | #endif |
134 | |