1 | #ifndef DATE_TIME_DATE_FORMATTING_LIMITED_HPP___ |
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2 | #define DATE_TIME_DATE_FORMATTING_LIMITED_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.txt or http://www.boost.org/LICENSE_1_0.txt) |
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8 | * Author: Jeff Garland, Bart Garst |
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9 | * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ |
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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 | |
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19 | namespace boost { |
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20 | namespace date_time { |
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21 | |
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22 | //! Formats a month as as string into an ostream |
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23 | template<class month_type, class format_type> |
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24 | class month_formatter |
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25 | { |
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26 | public: |
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27 | //! Formats a month as as string into an ostream |
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28 | /*! This function demands that month_type provide |
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29 | * functions for converting to short and long strings |
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30 | * if that capability is used. |
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31 | */ |
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32 | static std::ostream& format_month(const month_type& month, |
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33 | std::ostream& os) |
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34 | { |
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35 | switch (format_type::month_format()) |
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36 | { |
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37 | case month_as_short_string: |
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38 | { |
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39 | os << month.as_short_string(); |
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40 | break; |
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41 | } |
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42 | case month_as_long_string: |
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43 | { |
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44 | os << month.as_long_string(); |
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45 | break; |
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46 | } |
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47 | case month_as_integer: |
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48 | { |
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49 | os << std::setw(2) << std::setfill('0') << month.as_number(); |
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50 | break; |
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51 | } |
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52 | |
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53 | } |
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54 | return os; |
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55 | } // format_month |
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56 | }; |
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57 | |
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58 | |
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59 | //! Convert ymd to a standard string formatting policies |
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60 | template<class ymd_type, class format_type> |
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61 | class ymd_formatter |
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62 | { |
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63 | public: |
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64 | //! Convert ymd to a standard string formatting policies |
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65 | /*! This is standard code for handling date formatting with |
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66 | * year-month-day based date information. This function |
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67 | * uses the format_type to control whether the string will |
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68 | * contain separator characters, and if so what the character |
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69 | * will be. In addtion, it can format the month as either |
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70 | * an integer or a string as controled by the formatting |
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71 | * policy |
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72 | */ |
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73 | static std::string ymd_to_string(ymd_type ymd) |
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74 | { |
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75 | typedef typename ymd_type::month_type month_type; |
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76 | std::ostringstream ss; |
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77 | ss << ymd.year; |
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78 | if (format_type::has_date_sep_chars()) { |
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79 | ss << format_type::month_sep_char(); |
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80 | } |
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81 | //this name is a bit ugly, oh well.... |
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82 | month_formatter<month_type,format_type>::format_month(ymd.month, ss); |
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83 | if (format_type::has_date_sep_chars()) { |
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84 | ss << format_type::day_sep_char(); |
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85 | } |
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86 | ss << std::setw(2) << std::setfill('0') |
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87 | << ymd.day; |
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88 | return ss.str(); |
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89 | } |
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90 | }; |
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91 | |
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92 | |
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93 | //! Convert a date to string using format policies |
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94 | template<class date_type, class format_type> |
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95 | class date_formatter |
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96 | { |
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97 | public: |
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98 | //! Convert to a date to standard string using format policies |
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99 | static std::string date_to_string(date_type d) |
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100 | { |
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101 | typedef typename date_type::ymd_type ymd_type; |
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102 | if (d.is_not_a_date()) { |
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103 | return format_type::not_a_date(); |
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104 | } |
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105 | if (d.is_neg_infinity()) { |
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106 | return format_type::neg_infinity(); |
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107 | } |
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108 | if (d.is_pos_infinity()) { |
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109 | return format_type::pos_infinity(); |
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110 | } |
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111 | ymd_type ymd = d.year_month_day(); |
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112 | return ymd_formatter<ymd_type, format_type>::ymd_to_string(ymd); |
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113 | } |
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114 | }; |
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115 | |
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116 | |
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117 | } } //namespace date_time |
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118 | |
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119 | |
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120 | #endif |
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121 | |
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