97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
|
|
||
|
|
#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 12:00:24 -0800 (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
|