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[/] [altor32/] [trunk/] [gcc-x64/] [or1knd-elf/] [or1knd-elf/] [include/] [c++/] [4.8.0/] [bits/] [sstream.tcc] - Blame information for rev 35

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1 35 ultra_embe
// String based streams -*- C++ -*-
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// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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// 2006, 2007, 2008, 2009, 2010, 2011
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// Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library.  This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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// .
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/** @file bits/sstream.tcc
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 *  This is an internal header file, included by other library headers.
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 *  Do not attempt to use it directly. @headername{sstream}
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 */
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//
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// ISO C++ 14882: 27.7  String-based streams
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//
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#ifndef _SSTREAM_TCC
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#define _SSTREAM_TCC 1
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#pragma GCC system_header
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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  template 
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    typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
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    basic_stringbuf<_CharT, _Traits, _Alloc>::
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    pbackfail(int_type __c)
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    {
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      int_type __ret = traits_type::eof();
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      if (this->eback() < this->gptr())
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        {
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          // Try to put back __c into input sequence in one of three ways.
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          // Order these tests done in is unspecified by the standard.
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          const bool __testeof = traits_type::eq_int_type(__c, __ret);
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          if (!__testeof)
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            {
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              const bool __testeq = traits_type::eq(traits_type::
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                                                    to_char_type(__c),
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                                                    this->gptr()[-1]);
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              const bool __testout = this->_M_mode & ios_base::out;
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              if (__testeq || __testout)
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                {
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                  this->gbump(-1);
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                  if (!__testeq)
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                    *this->gptr() = traits_type::to_char_type(__c);
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                  __ret = __c;
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                }
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            }
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          else
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            {
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              this->gbump(-1);
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              __ret = traits_type::not_eof(__c);
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            }
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        }
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      return __ret;
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    }
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  template 
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    typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
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    basic_stringbuf<_CharT, _Traits, _Alloc>::
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    overflow(int_type __c)
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    {
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      const bool __testout = this->_M_mode & ios_base::out;
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      if (__builtin_expect(!__testout, false))
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        return traits_type::eof();
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      const bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());
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      if (__builtin_expect(__testeof, false))
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        return traits_type::not_eof(__c);
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      const __size_type __capacity = _M_string.capacity();
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      const __size_type __max_size = _M_string.max_size();
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      const bool __testput = this->pptr() < this->epptr();
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      if (__builtin_expect(!__testput && __capacity == __max_size, false))
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        return traits_type::eof();
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      // Try to append __c into output sequence in one of two ways.
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      // Order these tests done in is unspecified by the standard.
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      const char_type __conv = traits_type::to_char_type(__c);
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      if (!__testput)
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        {
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          // NB: Start ostringstream buffers at 512 chars.  This is an
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          // experimental value (pronounced "arbitrary" in some of the
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          // hipper English-speaking countries), and can be changed to
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          // suit particular needs.
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          //
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          // _GLIBCXX_RESOLVE_LIB_DEFECTS
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          // 169. Bad efficiency of overflow() mandated
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          // 432. stringbuf::overflow() makes only one write position
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          //      available
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          const __size_type __opt_len = std::max(__size_type(2 * __capacity),
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                                                 __size_type(512));
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          const __size_type __len = std::min(__opt_len, __max_size);
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          __string_type __tmp;
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          __tmp.reserve(__len);
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          if (this->pbase())
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            __tmp.assign(this->pbase(), this->epptr() - this->pbase());
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          __tmp.push_back(__conv);
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          _M_string.swap(__tmp);
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          _M_sync(const_cast(_M_string.data()),
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                  this->gptr() - this->eback(), this->pptr() - this->pbase());
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        }
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      else
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        *this->pptr() = __conv;
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      this->pbump(1);
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      return __c;
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    }
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130
  template 
131
    typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
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    basic_stringbuf<_CharT, _Traits, _Alloc>::
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    underflow()
134
    {
135
      int_type __ret = traits_type::eof();
136
      const bool __testin = this->_M_mode & ios_base::in;
137
      if (__testin)
138
        {
139
          // Update egptr() to match the actual string end.
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          _M_update_egptr();
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142
          if (this->gptr() < this->egptr())
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            __ret = traits_type::to_int_type(*this->gptr());
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        }
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      return __ret;
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    }
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148
  template 
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    typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
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    basic_stringbuf<_CharT, _Traits, _Alloc>::
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    seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __mode)
152
    {
153
      pos_type __ret =  pos_type(off_type(-1));
154
      bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
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      bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
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      const bool __testboth = __testin && __testout && __way != ios_base::cur;
157
      __testin &= !(__mode & ios_base::out);
158
      __testout &= !(__mode & ios_base::in);
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160
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
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      // 453. basic_stringbuf::seekoff need not always fail for an empty stream.
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      const char_type* __beg = __testin ? this->eback() : this->pbase();
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      if ((__beg || !__off) && (__testin || __testout || __testboth))
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        {
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          _M_update_egptr();
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167
          off_type __newoffi = __off;
168
          off_type __newoffo = __newoffi;
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          if (__way == ios_base::cur)
170
            {
171
              __newoffi += this->gptr() - __beg;
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              __newoffo += this->pptr() - __beg;
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            }
174
          else if (__way == ios_base::end)
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            __newoffo = __newoffi += this->egptr() - __beg;
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          if ((__testin || __testboth)
178
              && __newoffi >= 0
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              && this->egptr() - __beg >= __newoffi)
180
            {
181
              this->setg(this->eback(), this->eback() + __newoffi,
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                         this->egptr());
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              __ret = pos_type(__newoffi);
184
            }
185
          if ((__testout || __testboth)
186
              && __newoffo >= 0
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              && this->egptr() - __beg >= __newoffo)
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            {
189
              _M_pbump(this->pbase(), this->epptr(), __newoffo);
190
              __ret = pos_type(__newoffo);
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            }
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        }
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      return __ret;
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    }
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  template 
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    typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
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    basic_stringbuf<_CharT, _Traits, _Alloc>::
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    seekpos(pos_type __sp, ios_base::openmode __mode)
200
    {
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      pos_type __ret =  pos_type(off_type(-1));
202
      const bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
203
      const bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
204
 
205
      const char_type* __beg = __testin ? this->eback() : this->pbase();
206
      if ((__beg || !off_type(__sp)) && (__testin || __testout))
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        {
208
          _M_update_egptr();
209
 
210
          const off_type __pos(__sp);
211
          const bool __testpos = (0 <= __pos
212
                                  && __pos <= this->egptr() - __beg);
213
          if (__testpos)
214
            {
215
              if (__testin)
216
                this->setg(this->eback(), this->eback() + __pos,
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                           this->egptr());
218
              if (__testout)
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                _M_pbump(this->pbase(), this->epptr(), __pos);
220
              __ret = __sp;
221
            }
222
        }
223
      return __ret;
224
    }
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226
  template 
227
    void
228
    basic_stringbuf<_CharT, _Traits, _Alloc>::
229
    _M_sync(char_type* __base, __size_type __i, __size_type __o)
230
    {
231
      const bool __testin = _M_mode & ios_base::in;
232
      const bool __testout = _M_mode & ios_base::out;
233
      char_type* __endg = __base + _M_string.size();
234
      char_type* __endp = __base + _M_string.capacity();
235
 
236
      if (__base != _M_string.data())
237
        {
238
          // setbuf: __i == size of buffer area (_M_string.size() == 0).
239
          __endg += __i;
240
          __i = 0;
241
          __endp = __endg;
242
        }
243
 
244
      if (__testin)
245
        this->setg(__base, __base + __i, __endg);
246
      if (__testout)
247
        {
248
          _M_pbump(__base, __endp, __o);
249
          // egptr() always tracks the string end.  When !__testin,
250
          // for the correct functioning of the streambuf inlines
251
          // the other get area pointers are identical.
252
          if (!__testin)
253
            this->setg(__endg, __endg, __endg);
254
        }
255
    }
256
 
257
  template 
258
    void
259
    basic_stringbuf<_CharT, _Traits, _Alloc>::
260
    _M_pbump(char_type* __pbeg, char_type* __pend, off_type __off)
261
    {
262
      this->setp(__pbeg, __pend);
263
      while (__off > __gnu_cxx::__numeric_traits::__max)
264
        {
265
          this->pbump(__gnu_cxx::__numeric_traits::__max);
266
          __off -= __gnu_cxx::__numeric_traits::__max;
267
        }
268
      this->pbump(__off);
269
    }
270
 
271
  // Inhibit implicit instantiations for required instantiations,
272
  // which are defined via explicit instantiations elsewhere.
273
#if _GLIBCXX_EXTERN_TEMPLATE
274
  extern template class basic_stringbuf;
275
  extern template class basic_istringstream;
276
  extern template class basic_ostringstream;
277
  extern template class basic_stringstream;
278
 
279
#ifdef _GLIBCXX_USE_WCHAR_T
280
  extern template class basic_stringbuf;
281
  extern template class basic_istringstream;
282
  extern template class basic_ostringstream;
283
  extern template class basic_stringstream;
284
#endif
285
#endif
286
 
287
_GLIBCXX_END_NAMESPACE_VERSION
288
} // namespace std
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290
#endif

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