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STLport-4.5.3
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_time_facets.h
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2001-08-28
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/*
* Copyright (c) 1999
* Silicon Graphics Computer Systems, Inc.
*
* Copyright (c) 1999
* Boris Fomitchev
*
* This material is provided "as is", with absolutely no warranty expressed
* or implied. Any use is at your own risk.
*
* Permission to use or copy this software for any purpose is hereby granted
* without fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*
*/
// WARNING: This is an internal header file, included by other C++
// standard library headers. You should not attempt to use this header
// file directly.
#ifndef _STLP_INTERNAL_TIME_FACETS_H
#define _STLP_INTERNAL_TIME_FACETS_H
#ifndef _STLP_CTIME
# include <ctime> // Needed (for struct tm) by time facets
#endif
#include <stl/c_locale.h>
#include <stl/_ios_base.h>
_STLP_BEGIN_NAMESPACE
// Template functions used by time_get
// Matching input against a list of names
// Alphabetic input of the names of months and the names
// of weekdays requires matching input against a list of names.
// We use a simple generic algorithm to accomplish this. This
// algorithm is not very efficient, especially for longer lists
// of names, but it probably does not matter for the initial
// implementation and it may never matter, since we do not expect
// this kind of input to be used very often. The algorithm
// could be improved fairly simply by creating a new list of
// names still in the running at each iteration. A more sophisticated
// approach would be to build a trie to do the matching.
//
// We compare each character of the input to the corresponding
// character of each name on the list that has not been eliminated,
// either because every character in the name has already been
// matched, or because some character has not been matched. We
// continue only as long as there are some names that have not been
// eliminated.
// We do not really need a random access iterator (a forward iterator
// would do), but the extra generality makes the notation clumsier,
// and we don't really need it.
// We can recognize a failed match by the fact that the second
// component of the return value will be __name_end.
#define _MAXNAMES 64
#define _MAX_NAME_LENGTH 64
// Both time_get and time_put need a structure of type _Time_Info
// to provide names and abbreviated names for months and days,
// as well as the am/pm designator. The month and weekday tables
// have the all the abbreviated names before all the full names.
// The _Time_Info tables are initialized using the non-template
// function _Init_timeinfo, which has two overloadings: one
// with a single reference parameter for the table to be initialized,
// and one with a second _Locale_time * parameter. The first form
// is called by the default constructor and the second by a special
// constructor invoked from the _byname subclass constructor to
// construct the base class.
class _STLP_CLASS_DECLSPEC _Time_Info {
public:
string _M_dayname[14];
string _M_monthname[24];
string _M_am_pm[2];
string _M_time_format;
string _M_date_format;
string _M_date_time_format;
string _M_long_date_format;
string _M_long_date_time_format;
};
void _STLP_CALL _Init_timeinfo(_Time_Info&);
void _STLP_CALL _Init_timeinfo(_Time_Info&, _Locale_time*);
class _STLP_CLASS_DECLSPEC time_base {
public:
enum dateorder {no_order, dmy, mdy, ymd, ydm};
};
template <class _Ch, __DFL_TMPL_PARAM( _InIt , istreambuf_iterator<_Ch>) >
class time_get : public locale::facet, public time_base
{
friend class _Locale;
public:
typedef _Ch char_type;
typedef _InIt iter_type;
explicit time_get(size_t __refs = 0) : _BaseFacet(__refs) {
_Init_timeinfo(_M_timeinfo);
}
dateorder date_order() const { return do_date_order(); }
iter_type get_time(iter_type __s, iter_type __end, ios_base& __str,
ios_base::iostate& __err, tm* __t) const
{ return do_get_time(__s, __end, __str, __err, __t); }
iter_type get_date(iter_type __s, iter_type __end, ios_base& __str,
ios_base::iostate& __err, tm* __t) const
{ return do_get_date(__s, __end, __str, __err, __t); }
iter_type get_weekday(iter_type __s, iter_type __end, ios_base& __str,
ios_base::iostate& __err, tm* __t) const
{ return do_get_weekday(__s, __end, __str, __err, __t); }
iter_type get_monthname(iter_type __s, iter_type __end, ios_base& __str,
ios_base::iostate& __err, tm* __t) const
{ return do_get_monthname(__s, __end, __str, __err, __t); }
iter_type get_year(iter_type __s, iter_type __end, ios_base& __str,
ios_base::iostate& __err, tm* __t) const
{ return do_get_year(__s, __end, __str, __err, __t); }
_STLP_STATIC_MEMBER_DECLSPEC static locale::id id;
protected:
_Time_Info _M_timeinfo;
time_get(_Locale_time *, size_t __refs) : _BaseFacet(__refs) {}
~time_get() {}
virtual dateorder do_date_order() const {return no_order;}
virtual iter_type do_get_time(iter_type __s, iter_type __end,
ios_base&, ios_base::iostate& __err,
tm* __t) const;
virtual iter_type do_get_date(iter_type __s, iter_type __end,
ios_base&, ios_base::iostate& __err,
tm* __t) const;
virtual iter_type do_get_weekday(iter_type __s, iter_type __end,
ios_base&,
ios_base::iostate& __err,
tm* __t) const;
virtual iter_type do_get_monthname(iter_type __s, iter_type __end,
ios_base&,
ios_base::iostate& __err,
tm* __t) const;
virtual iter_type do_get_year(iter_type __s, iter_type __end,
ios_base&, ios_base::iostate& __err,
tm* __t) const;
};
time_base::dateorder _STLP_CALL
__get_date_order(_Locale_time*);
_Locale_time* _STLP_CALL __acquire_time(const char* __name);
void _STLP_CALL __release_time(_Locale_time* __time);
template <class _Ch, __DFL_TMPL_PARAM( _InIt , istreambuf_iterator<_Ch>) >
class time_get_byname : public time_get<_Ch, _InIt>
{
public:
typedef time_base::dateorder dateorder;
typedef _InIt iter_type;
explicit time_get_byname(const char* __name, size_t __refs = 0)
: time_get<_Ch, _InIt>((_Locale_time*) 0, __refs),
_M_time(__acquire_time(__name))
{ _Init_timeinfo(this->_M_timeinfo, this->_M_time); }
protected:
~time_get_byname() { __release_time(_M_time); }
dateorder do_date_order() const { return __get_date_order(_M_time); }
private:
_Locale_time* _M_time;
};
// time_put facet
// For the formats 'x, 'X', and 'c', do_put calls the first form of
// put with the pattern obtained from _M_timeinfo._M_date_format or
// _M_timeinfo._M_time_format.
// Helper function: __ takes a single-character
// format. As indicated by the foregoing remark, this will never be
// 'x', 'X', or 'c'.
char * _STLP_CALL
__write_formatted_time(char * __buf, char __format, char __modifier,
const _Time_Info& __table, const tm* __t);
template <class _OuIt>
inline _OuIt _STLP_CALL __put_time(char * __first, char * __last, _OuIt __out,
const ios_base& /* __loc */, char) {
return copy(__first, __last, __out);
}
# ifndef _STLP_NO_WCHAR_T
template <class _OuIt>
_OuIt _STLP_CALL __put_time(char * __first, char * __last, _OuIt __out,
const ios_base& __s, wchar_t);
# endif
template<class _Ch, __DFL_TMPL_PARAM( _OutputIter , ostreambuf_iterator<_Ch> ) >
class time_put : public locale::facet, public time_base
{
friend class _Locale;
public:
typedef _Ch char_type;
typedef _OutputIter iter_type;
explicit time_put(size_t __refs = 0) : _BaseFacet(__refs) {
_Init_timeinfo(_M_timeinfo);
}
_OutputIter put(iter_type __s, ios_base& __f, _Ch __fill,
const tm* __tmb,
const _Ch* __pat, const _Ch* __pat_end) const;
_OutputIter put(iter_type __s, ios_base& __f, _Ch __fill,
const tm* __tmb, char __format, char __modifier = 0) const {
return do_put(__s, __f, __fill, __tmb, __format, __modifier);
}
_STLP_STATIC_MEMBER_DECLSPEC static locale::id id;
protected:
_Time_Info _M_timeinfo;
time_put(_Locale_time* /*__time*/, size_t __refs) : _BaseFacet(__refs) {
// _Init_timeinfo(_M_timeinfo, __time);
}
~time_put() {}
virtual iter_type do_put(iter_type __s, ios_base& __f,
char_type /* __fill */, const tm* __tmb,
char __format, char /* __modifier */) const;
};
template <class _Ch, __DFL_TMPL_PARAM( _InIt , ostreambuf_iterator<_Ch> ) >
class time_put_byname : public time_put<_Ch, _InIt>
{
friend class _Locale;
public:
typedef time_base::dateorder dateorder;
typedef _InIt iter_type;
typedef _Ch char_type;
explicit time_put_byname(const char * __name, size_t __refs = 0)
: time_put<_Ch, _InIt>((_Locale_time*) 0, __refs),
_M_time(__acquire_time(__name))
{ _Init_timeinfo(this->_M_timeinfo, this->_M_time); }
protected:
~time_put_byname() { __release_time(_M_time); }
private:
_Locale_time* _M_time;
};
# ifdef _STLP_USE_TEMPLATE_EXPORT
_STLP_EXPORT_TEMPLATE_CLASS time_get<char, istreambuf_iterator<char, char_traits<char> > >;
_STLP_EXPORT_TEMPLATE_CLASS time_put<char, ostreambuf_iterator<char, char_traits<char> > >;
// _STLP_EXPORT_TEMPLATE_CLASS time_get<char, const char*>;
// _STLP_EXPORT_TEMPLATE_CLASS time_put<char, char*>;
# ifndef _STLP_NO_WCHAR_T
_STLP_EXPORT_TEMPLATE_CLASS time_get<wchar_t, istreambuf_iterator<wchar_t, char_traits<wchar_t> > >;
_STLP_EXPORT_TEMPLATE_CLASS time_put<wchar_t, ostreambuf_iterator<wchar_t, char_traits<wchar_t> > >;
// _STLP_EXPORT_TEMPLATE_CLASS time_get<wchar_t, const wchar_t*>;
// _STLP_EXPORT_TEMPLATE_CLASS time_put<wchar_t, wchar_t*>;
# endif /* INSTANTIATE_WIDE_STREAMS */
# endif
# if defined (__BORLANDC__) && defined (_RTLDLL)
inline void _Stl_loc_init_time_facets() {
time_get<char, istreambuf_iterator<char, char_traits<char> > >::id._M_index = 16;
time_get<char, const char*>::id._M_index = 17;
time_put<char, ostreambuf_iterator<char, char_traits<char> > >::id._M_index = 18;
time_put<char, char*>::id._M_index = 19;
# ifndef _STLP_NO_WCHAR_T
time_get<wchar_t, istreambuf_iterator<wchar_t, char_traits<wchar_t> > >::id._M_index = 35;
time_get<wchar_t, const wchar_t*>::id._M_index = 36;
time_put<wchar_t, ostreambuf_iterator<wchar_t, char_traits<wchar_t> > >::id._M_index = 37;
time_put<wchar_t, wchar_t*>::id._M_index = 38;
# endif
}
# endif
_STLP_END_NAMESPACE
#if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)
# include <stl/_time_facets.c>
# endif
#endif /* _STLP_INTERNAL_TIME_FACETS_H */
// Local Variables:
// mode:C++
// End: