52 template <class _CharT, class _Traits>

    53 streamsize

    54 basic_streambuf<_CharT, _Traits>::xsgetn(_CharT* __s, streamsize __n) {

    55   streamsize __result = 0;

    56   const int_type __eof = _Traits::eof();

    58   while (__result < __n) {

    59     if (_M_gnext < _M_gend) {

    60       size_t __chunk = (min) (__STATIC_CAST(size_t,_M_gend - _M_gnext),

    61                               __STATIC_CAST(size_t,__n - __result));

    62       _Traits::copy(__s, _M_gnext, __chunk);

    63       __result += __chunk;

    64       __s += __chunk;

    65       _M_gnext += __chunk;

    66     }

    67     else {

    68       int_type __c = this->sbumpc();

    69       if (!_Traits::eq_int_type(__c, __eof)) {

    70         *__s = _Traits::to_char_type(__c);

    71         ++__result;

    72         ++__s;

    73       }

    74       else

    75         break;

    76     }

    77   }

    78 

    79   return __result;

    80 }

    81 

    82 template <class _CharT, class _Traits>

    83 streamsize

    84 basic_streambuf<_CharT, _Traits>::xsputn(const _CharT* __s, streamsize __n)

    85 {

    86   streamsize __result = 0;

    87   const int_type __eof = _Traits::eof();

    88 

    89   while (__result < __n) {

    90     if (_M_pnext < _M_pend) {

    91       size_t __chunk = (min) (__STATIC_CAST(size_t,_M_pend - _M_pnext),

    92                            __STATIC_CAST(size_t,__n - __result));

    93       _Traits::copy(_M_pnext, __s, __chunk);

    94       __result += __chunk;

    95       __s += __chunk;

    96       _M_pnext += __chunk;

    97     }

    98 

    99     else if (!_Traits::eq_int_type(this->overflow(_Traits::to_int_type(*__s)),

   100                                    __eof)) {

   101       ++__result;

   102       ++__s;

   103     }

   104     else

   105       break;

   106   }

   107   return __result;

   108 }

   109 

   110 template <class _CharT, class _Traits>

   111 streamsize

   112 basic_streambuf<_CharT, _Traits>::_M_xsputnc(_CharT __c, streamsize __n)

   113 {

   114   streamsize __result = 0;

   115   const int_type __eof = _Traits::eof();

   116 

   117   while (__result < __n) {

   118     if (_M_pnext < _M_pend) {

   119       size_t __chunk = (min) (__STATIC_CAST(size_t,_M_pend - _M_pnext),

   120                            __STATIC_CAST(size_t,__n - __result));

   121       _Traits::assign(_M_pnext, __chunk, __c);

   122       __result += __chunk;

   123       _M_pnext += __chunk;

   124     }

   125 

   126     else if (!_Traits::eq_int_type(this->overflow(_Traits::to_int_type(__c)),

   127                                    __eof))

   128       ++__result;

   129     else

   130       break;

   131   }

   132   return __result;

   133 }

   148 template <class _CharT, class _Traits>

   149 _STLP_TYPENAME_ON_RETURN_TYPE basic_streambuf<_CharT, _Traits>::int_type

   150 basic_streambuf<_CharT, _Traits>::pbackfail(int_type) {

   151  return _Traits::eof();

   152 }

   154 template <class _CharT, class _Traits>

   155 _STLP_TYPENAME_ON_RETURN_TYPE basic_streambuf<_CharT, _Traits>::int_type

   156 basic_streambuf<_CharT, _Traits>::overflow(int_type) {

   157   return _Traits::eof();

   158 }

   159 

   160 template <class _CharT, class _Traits>

   161 _STLP_TYPENAME_ON_RETURN_TYPE basic_streambuf<_CharT, _Traits>::int_type

   162 basic_streambuf<_CharT, _Traits>::uflow() {

   163     return ( _Traits::eq_int_type(this->underflow(),_Traits::eof()) ?

   164              _Traits::eof() :

   165              _Traits::to_int_type(*_M_gnext++));

   166 }

   167 

   168 template <class _CharT, class _Traits>

   169 _STLP_TYPENAME_ON_RETURN_TYPE basic_streambuf<_CharT, _Traits>::int_type

   170 basic_streambuf<_CharT, _Traits>::underflow()

   171 { return _Traits::eof(); }

   172 

   173 template <class _CharT, class _Traits>

   174 streamsize

   175 basic_streambuf<_CharT, _Traits>::showmanyc()

   176 { return 0; }

   177 

   178 template <class _CharT, class _Traits>

   179 void

   180 basic_streambuf<_CharT, _Traits>::imbue(const locale&) {}

   181 

   182 template <class _CharT, class _Traits>

   183 int

   184 basic_streambuf<_CharT, _Traits>::sync() { return 0; }

   185 

   186 template <class _CharT, class _Traits>

   187 _STLP_TYPENAME_ON_RETURN_TYPE basic_streambuf<_CharT, _Traits>::pos_type

   188 basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode)

   189 { return pos_type(-1); }

   190 

   191 template <class _CharT, class _Traits>

   192 _STLP_TYPENAME_ON_RETURN_TYPE basic_streambuf<_CharT, _Traits>::pos_type

   193 basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir,

   194                                           ios_base::openmode)

   195 { return pos_type(-1); }

   196 

   197 template <class _CharT, class _Traits>

   198 basic_streambuf<_CharT, _Traits>*

   199 basic_streambuf<_CharT, _Traits>:: setbuf(char_type*, streamsize)

   200 { return this; }