| |
| #ifndef DATETIME_SPECIAL_VALUE_FORMATTER_HPP___ |
| #define DATETIME_SPECIAL_VALUE_FORMATTER_HPP___ |
| |
| /* Copyright (c) 2004 CrystalClear Software, Inc. |
| * Use, modification and distribution is subject to the |
| * Boost Software License, Version 1.0. (See accompanying |
| * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
| * Author: Jeff Garland |
| * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ |
| */ |
| |
| #include <vector> |
| #include <string> |
| #include "boost/date_time/special_defs.hpp" |
| |
| namespace boost { namespace date_time { |
| |
| |
| //! Class that provides generic formmatting ostream formatting for special values |
| /*! This class provides for the formmating of special values to an output stream. |
| * In particular, it produces strings for the values of negative and positive |
| * infinity as well as not_a_date_time. |
| * |
| * While not a facet, this class is used by the date and time facets for formatting |
| * special value types. |
| * |
| */ |
| template <class CharT, class OutItrT = std::ostreambuf_iterator<CharT, std::char_traits<CharT> > > |
| class special_values_formatter |
| { |
| public: |
| typedef std::basic_string<CharT> string_type; |
| typedef CharT char_type; |
| typedef std::vector<string_type> collection_type; |
| static const char_type default_special_value_names[3][17]; |
| |
| //! Construct special values formatter using default strings. |
| /*! Default strings are not-a-date-time -infinity +infinity |
| */ |
| special_values_formatter() |
| { |
| std::copy(&default_special_value_names[0], |
| &default_special_value_names[3], |
| std::back_inserter(m_special_value_names)); |
| } |
| |
| //! Construct special values formatter from array of strings |
| /*! This constructor will take pair of iterators from an array of strings |
| * that represent the special values and copy them for use in formatting |
| * special values. |
| *@code |
| * const char* const special_value_names[]={"nadt","-inf","+inf" }; |
| * |
| * special_value_formatter svf(&special_value_names[0], &special_value_names[3]); |
| *@endcode |
| */ |
| special_values_formatter(const char_type* const* begin, const char_type* const* end) |
| { |
| std::copy(begin, end, std::back_inserter(m_special_value_names)); |
| } |
| special_values_formatter(typename collection_type::iterator beg, typename collection_type::iterator end) |
| { |
| std::copy(beg, end, std::back_inserter(m_special_value_names)); |
| } |
| |
| OutItrT put_special(OutItrT next, |
| const boost::date_time::special_values& value) const |
| { |
| |
| unsigned int index = value; |
| if (index < m_special_value_names.size()) { |
| std::copy(m_special_value_names[index].begin(), |
| m_special_value_names[index].end(), |
| next); |
| } |
| return next; |
| } |
| protected: |
| collection_type m_special_value_names; |
| }; |
| |
| //! Storage for the strings used to indicate special values |
| /* using c_strings to initialize these worked fine in testing, however, |
| * a project that compiled its objects separately, then linked in a separate |
| * step wound up with redefinition errors for the values in this array. |
| * Initializing individual characters eliminated this problem */ |
| template <class CharT, class OutItrT> |
| const typename special_values_formatter<CharT, OutItrT>::char_type special_values_formatter<CharT, OutItrT>::default_special_value_names[3][17] = { |
| {'n','o','t','-','a','-','d','a','t','e','-','t','i','m','e'}, |
| {'-','i','n','f','i','n','i','t','y'}, |
| {'+','i','n','f','i','n','i','t','y'} }; |
| |
| } } //namespace boost::date_time |
| |
| #endif |