_numpunct.h

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#ifndef _RWSTD_LOC_NUMPUNCT_H_INCLUDED
#define _RWSTD_LOC_NUMPUNCT_H_INCLUDED
 
 
#if __GNUG__ >= 3
#  pragma GCC system_header
#endif   // gcc >= 3
 
 
#include <string>
#include <loc/_facet.h>
#include <loc/_punct.h>
#include <rw/_defs.h>
 
 
_RWSTD_NAMESPACE (std) { 
 
 
// FIXME: provide just required specializations when #defined
// #ifndef _RWSTD_NO_EXT_NUMPUNCT_PRIMARY
 
// 22.2.3.1
_EXPORT
template <class _CharT>
struct numpunct: _RW::__rw_facet
{
    typedef _CharT char_type;
    typedef
    basic_string<char_type, char_traits<char_type>, allocator<char_type> >
    string_type;
 
    explicit numpunct (_RWSTD_SIZE_T __ref = 0)
        : _RW::__rw_facet (__ref), _C_flags (0) { }
 
    virtual ~numpunct ();
 
    // 22.2.3.1.1, p1
    char_type decimal_point () const;
 
    // 22.2.3.1.1, p2
    char_type thousands_sep () const;
 
    // 22.2.3.1.1, p3
    string grouping () const;
 
    // 22.2.3.1.1, p4
    string_type truename () const;
 
    // 22.2.3.1.1, p4
    string_type falsename () const;
 
    static _RW::__rw_facet_id id;
 
protected:
 
    // 22.2.3.1.2, p1
    virtual char_type do_decimal_point () const {
        return *_RW::__rw_get_punct (this, _RW::__rw_dp, char_type ());
    }
 
    // 22.2.3.1.2, p2
    virtual char_type do_thousands_sep () const {
        return *_RW::__rw_get_punct (this, _RW::__rw_ts, char_type ());
    }
 
    // 22.2.3.1.2, p3
    virtual string do_grouping () const {
        return _RWSTD_REINTERPRET_CAST (const char*,
                   _RW::__rw_get_punct (this, _RW::__rw_gr, char_type ()));
    }
 
    // 22.2.3.1.2, p4
    virtual string_type do_truename () const {
        return _RW::__rw_get_punct (this, _RW::__rw_tn, char_type ());
    }
 
    // 22.2.3.1.2, p4
    virtual string_type do_falsename () const {
        return _RW::__rw_get_punct (this, _RW::__rw_fn, char_type ());
    }
 
private:
 
    int         _C_flags;           // bitmap of "cached data valid" flags
    string      _C_grouping;        // cached results of virtual members
    string_type _C_truename;
    string_type _C_falsename;
    char_type   _C_decimal_point;
    char_type   _C_thousands_sep;
};
 
 
#ifndef _RWSTD_NO_SPECIALIZED_FACET_ID
 
_RWSTD_SPECIALIZED_CLASS
_RW::__rw_facet_id numpunct<char>::id;
 
#  ifndef _RWSTD_NO_WCHAR_T
 
_RWSTD_SPECIALIZED_CLASS
_RW::__rw_facet_id numpunct<wchar_t>::id;
 
#  endif   // _RWSTD_NO_WCHAR_T
#endif   // _RWSTD_NO_SPECIALIZED_FACET_ID
 
 
template <class _CharT>
inline typename numpunct<_CharT>::char_type
numpunct<_CharT>::decimal_point () const
{
    if (!(_C_flags & _RW::__rw_dp)) {
 
        numpunct* const __self = _RWSTD_CONST_CAST (numpunct*, this);
 
        // [try to] get the decimal point first (may throw)
        // then set a flag to avoid future initializations
        __self->_C_decimal_point  = do_decimal_point ();
        __self->_C_flags         |= _RW::__rw_dp;
    }
 
    return _C_decimal_point;
}
 
 
template <class _CharT>
inline typename numpunct<_CharT>::char_type
numpunct<_CharT>::thousands_sep () const
{
    if (!(_C_flags & _RW::__rw_ts)) {
 
        numpunct* const __self = _RWSTD_CONST_CAST (numpunct*, this);
 
        // [try to] get the thousands_sep first (may throw)
        // then set a flag to avoid future initializations
        __self->_C_thousands_sep  = do_thousands_sep ();
        __self->_C_flags         |= _RW::__rw_ts;
    }
 
    return _C_thousands_sep;
}
 
 
template <class _CharT>
inline string numpunct<_CharT>::grouping () const
{
    if (!(_C_flags & _RW::__rw_gr)) {
 
        numpunct* const __self = _RWSTD_CONST_CAST (numpunct*, this);
 
        // [try to] get the grouping first (may throw)
        // then set a flag to avoid future initializations
        __self->_C_grouping  = do_grouping ();
        __self->_C_flags    |= _RW::__rw_gr;
    }
 
    return _C_grouping;
}
 
 
template <class _CharT>
inline typename numpunct<_CharT>::string_type
numpunct<_CharT>::truename () const
{
    if (!(_C_flags & _RW::__rw_tn)) {
 
        numpunct* const __self = _RWSTD_CONST_CAST (numpunct*, this);
 
        // [try to] get the true name first (may throw)
        // then set a flag to avoid future initializations
        __self->_C_truename  = do_truename ();
        __self->_C_flags    |= _RW::__rw_tn;
    }
 
    return _C_truename;
}
 
 
template <class _CharT>
inline typename numpunct<_CharT>::string_type
numpunct<_CharT>::falsename () const
{
    if (!(_C_flags & _RW::__rw_fn)) {
 
        numpunct* const __self = _RWSTD_CONST_CAST (numpunct*, this);
 
        // [try to] get the false name first (may throw)
        // then set a flag to avoid future initializations
        __self->_C_falsename  = do_falsename ();
        __self->_C_flags     |= _RW::__rw_fn;
    }
 
    return _C_falsename;
}
 
// #endif _RWSTD_NO_EXT_NUMPUNCT_PRIMARY
 
 
// 22.2.3.2
template <class _CharT>
class numpunct_byname: public numpunct<_CharT>
{
    char _C_namebuf [32];
 
public:
 
    explicit numpunct_byname (const char *__name, _RWSTD_SIZE_T __refs = 0)
        : numpunct<_CharT>(__refs) {
        this->_C_set_name (__name, _C_namebuf, sizeof _C_namebuf);
    }
 
    virtual ~numpunct_byname () _RWSTD_ATTRIBUTE_NOTHROW;
};
 
}   // namespace std
 
 
#if _RWSTD_DEFINE_TEMPLATE_FIRST (_NUMPUNCT)
#  include <loc/_numpunct.cc>
#endif   // _RWSTD_DEFINE_TEMPLATE_FIRST (_NUMPUNCT)
 
 
#ifdef _RWSTD_MSVC
#  pragma warning (push)
#  pragma warning (disable: 4231)
#endif   // _RWSTD_MSVC
 
 
_RWSTD_NAMESPACE (std) { 
 
#if _RWSTD_INSTANTIATE (_NUMPUNCT, _CHAR)
 
_RWSTD_INSTANTIATE_1 (struct _RWSTD_TI_EXPORT numpunct<char>);
 
#endif   // _RWSTD_INSTANTIATE (_NUMPUNCT, _CHAR)
 
#if _RWSTD_INSTANTIATE (_NUMPUNCT, _WCHAR_T)
 
_RWSTD_INSTANTIATE_1 (struct _RWSTD_TI_EXPORT numpunct<wchar_t>);
 
#endif   // _RWSTD_INSTANTIATE (_NUMPUNCT, _WCHAR_T)
 
}   // namespace std
 
 
#ifdef _RWSTD_MSVC
#  pragma warning (pop)
#endif   // _RWSTD_MSVC
 
 
#if _RWSTD_DEFINE_TEMPLATE_LAST (_NUMPUNCT)
#  include <loc/_numpunct.cc>
#endif   // _RWSTD_DEFINE_TEMPLATE_LAST (_NUMPUNCT)
 
 
#endif   // _RWSTD_LOC_NUMPUNCT_H_INCLUDED