[857] | 1 | #ifndef DATE_TIME_STRINGS_FROM_FACET__HPP___
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| 2 | #define DATE_TIME_STRINGS_FROM_FACET__HPP___
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| 3 |
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| 4 | /* Copyright (c) 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
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| 9 | * $Date: 2005/03/04 06:52:10 $
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| 10 | */
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| 11 |
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| 12 | #include <sstream>
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| 13 | #include <string>
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| 14 | #include <vector>
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| 15 | #include <locale>
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| 16 |
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| 17 | namespace boost { namespace date_time {
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| 18 |
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| 19 | //! This function gathers up all the month strings from a std::locale
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| 20 | /*! Using the time_put facet, this function creates a collection of
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| 21 | * all the month strings from a locale. This is handy when building
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| 22 | * custom date parsers or formatters that need to be localized.
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| 23 | *
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| 24 | *@param charT The type of char to use when gathering typically char
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| 25 | * or wchar_t.
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| 26 | *@param locale The locale to use when gathering the strings
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| 27 | *@param short_strings True(default) to gather short strings,
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| 28 | * false for long strings.
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| 29 | *@return A vector of strings containing the strings in order. eg:
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| 30 | * Jan, Feb, Mar, etc.
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| 31 | */
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| 32 | template<typename charT>
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| 33 | std::vector<std::basic_string<charT> >
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| 34 | gather_month_strings(const std::locale& locale, bool short_strings=true)
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| 35 | {
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| 36 | typedef std::basic_string<charT> string_type;
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| 37 | typedef std::vector<string_type> collection_type;
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| 38 | typedef std::basic_ostringstream<charT> ostream_type;
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| 39 | typedef std::ostreambuf_iterator<charT> ostream_iter_type;
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| 40 | typedef std::basic_stringstream<charT> stringstream_type;
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| 41 | typedef std::time_put<charT> time_put_facet_type;
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| 42 | charT short_fmt[3] = { '%', 'b' };
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| 43 | charT long_fmt[3] = { '%', 'B' };
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| 44 | collection_type months;
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| 45 | string_type outfmt(short_fmt);
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| 46 | if (!short_strings) {
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| 47 | outfmt = long_fmt;
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| 48 | }
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| 49 | {
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| 50 | //grab the needed strings by using the locale to
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| 51 | //output each month
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| 52 | for (int m=0; m < 12; m++) {
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| 53 | tm tm_value;
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| 54 | tm_value.tm_mon = m;
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| 55 | stringstream_type ss;
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| 56 | ostream_iter_type oitr(ss);
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| 57 | std::use_facet<time_put_facet_type>(locale).put(oitr, ss, ss.fill(),
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| 58 | &tm_value,
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| 59 | &*outfmt.begin(),
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| 60 | &*outfmt.begin()+outfmt.size());
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| 61 | months.push_back(ss.str());
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| 62 | }
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| 63 | }
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| 64 | return months;
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| 65 | }
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| 66 |
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| 67 | //! This function gathers up all the weekday strings from a std::locale
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| 68 | /*! Using the time_put facet, this function creates a collection of
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| 69 | * all the weekday strings from a locale starting with the string for
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| 70 | * 'Sunday'. This is handy when building custom date parsers or
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| 71 | * formatters that need to be localized.
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| 72 | *
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| 73 | *@param charT The type of char to use when gathering typically char
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| 74 | * or wchar_t.
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| 75 | *@param locale The locale to use when gathering the strings
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| 76 | *@param short_strings True(default) to gather short strings,
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| 77 | * false for long strings.
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| 78 | *@return A vector of strings containing the weekdays in order. eg:
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| 79 | * Sun, Mon, Tue, Wed, Thu, Fri, Sat
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| 80 | */
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| 81 | template<typename charT>
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| 82 | std::vector<std::basic_string<charT> >
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| 83 | gather_weekday_strings(const std::locale& locale, bool short_strings=true)
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| 84 | {
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| 85 | typedef std::basic_string<charT> string_type;
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| 86 | typedef std::vector<string_type> collection_type;
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| 87 | typedef std::basic_ostringstream<charT> ostream_type;
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| 88 | typedef std::ostreambuf_iterator<charT> ostream_iter_type;
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| 89 | typedef std::basic_stringstream<charT> stringstream_type;
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| 90 | typedef std::time_put<charT> time_put_facet_type;
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| 91 | charT short_fmt[3] = { '%', 'a' };
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| 92 | charT long_fmt[3] = { '%', 'A' };
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| 93 |
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| 94 | collection_type weekdays;
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| 95 |
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| 96 |
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| 97 | string_type outfmt(short_fmt);
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| 98 | if (!short_strings) {
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| 99 | outfmt = long_fmt;
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| 100 | }
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| 101 | {
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| 102 | //grab the needed strings by using the locale to
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| 103 | //output each month / weekday
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| 104 | for (int i=0; i < 7; i++) {
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| 105 | tm tm_value;
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| 106 | tm_value.tm_wday = i;
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| 107 | stringstream_type ss;
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| 108 | ostream_iter_type oitr(ss);
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| 109 | std::use_facet<time_put_facet_type>(locale).put(oitr, ss, ss.fill(),
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| 110 | &tm_value,
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| 111 | &*outfmt.begin(),
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| 112 | &*outfmt.begin()+outfmt.size());
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| 113 |
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| 114 | weekdays.push_back(ss.str());
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| 115 | }
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| 116 | }
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| 117 | return weekdays;
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| 118 | }
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| 119 |
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| 120 | } } //namespace
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| 121 |
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| 122 |
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| 123 | #endif
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