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TBE/MinGW/include/c++/3.2.3/bits/sstream.tcc

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+// String based streams -*- C++ -*-
+
+// Copyright (C) 1997, 1998, 1999, 2001, 2002
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+//
+// ISO C++ 14882: 27.7  String-based streams
+//
+
+#ifndef _CPP_BITS_SSTREAM_TCC
+#define _CPP_BITS_SSTREAM_TCC	1
+
+#pragma GCC system_header
+
+#include <sstream>
+
+namespace std
+{
+  template <class _CharT, class _Traits, class _Alloc>
+    typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type 
+    basic_stringbuf<_CharT, _Traits, _Alloc>::
+    pbackfail(int_type __c)
+    {
+      int_type __ret = traits_type::eof();
+      bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());
+      bool __testpos = _M_in_cur && _M_in_beg < _M_in_cur; 
+      
+      // Try to put back __c into input sequence in one of three ways.
+      // Order these tests done in is unspecified by the standard.
+      if (__testpos)
+	{
+	  if (traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])
+	      && !__testeof)
+	    {
+	      --_M_in_cur;
+	      __ret = __c;
+	    }
+	  else if (!__testeof)
+	    {
+	      --_M_in_cur;
+	      *_M_in_cur = traits_type::to_char_type(__c);
+	      __ret = __c;
+	    }
+	  else if (__testeof)
+	    {
+	      --_M_in_cur;
+	      __ret = traits_type::not_eof(__c);
+	    }
+	}
+      return __ret;
+    }
+  
+  template <class _CharT, class _Traits, class _Alloc>
+    typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type 
+    basic_stringbuf<_CharT, _Traits, _Alloc>::
+    overflow(int_type __c)
+    {
+      int_type __ret = traits_type::eof();
+      bool __testeof = traits_type::eq_int_type(__c, __ret);
+      bool __testwrite = _M_out_cur < _M_buf + _M_buf_size;
+      bool __testout = _M_mode & ios_base::out;
+
+      // Try to append __c into output sequence in one of two ways.
+      // Order these tests done in is unspecified by the standard.
+      if (__testout)
+	{
+	  if (!__testeof)
+	    {
+	      __size_type __len = max(_M_buf_size, _M_buf_size_opt);
+	      __len *= 2;
+
+	      if (__testwrite)
+		__ret = this->sputc(traits_type::to_char_type(__c));
+	      else if (__len <= _M_string.max_size())
+		{
+		  // Force-allocate, re-sync.
+		  _M_string = this->str();
+		  _M_string.reserve(__len);
+		  _M_buf_size = __len;
+		  _M_really_sync(_M_in_cur - _M_in_beg, 
+				 _M_out_cur - _M_out_beg);
+		  *_M_out_cur = traits_type::to_char_type(__c);
+		  _M_out_cur_move(1);
+		  __ret = __c;
+		}
+	    }
+	  else
+	    __ret = traits_type::not_eof(__c);
+	}
+      return __ret;
+    }
+
+  template <class _CharT, class _Traits, class _Alloc>
+    typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
+    basic_stringbuf<_CharT, _Traits, _Alloc>::
+    seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __mode)
+    {
+      pos_type __ret =  pos_type(off_type(-1)); 
+      bool __testin = (ios_base::in & _M_mode & __mode) != 0;
+      bool __testout = (ios_base::out & _M_mode & __mode) != 0;
+      bool __testboth = __testin && __testout && __way != ios_base::cur;
+      __testin &= !(__mode & ios_base::out);
+      __testout &= !(__mode & ios_base::in);
+
+      if (_M_buf_size && (__testin || __testout || __testboth))
+	{
+	  char_type* __beg = _M_buf;
+	  char_type* __curi = NULL;
+	  char_type* __curo = NULL;
+	  char_type* __endi = NULL;
+	  char_type* __endo = NULL;
+
+	  if (__testin || __testboth)
+	    {
+	      __curi = this->gptr();
+	      __endi = this->egptr();
+	    }
+	  if (__testout || __testboth)
+	    {
+	      __curo = this->pptr();
+	      __endo = this->epptr();
+	    }
+
+	  off_type __newoffi = 0;
+	  off_type __newoffo = 0;
+	  if (__way == ios_base::cur)
+	    {
+	      __newoffi = __curi - __beg;
+	      __newoffo = __curo - __beg;
+	    }
+	  else if (__way == ios_base::end)
+	    {
+	      __newoffi = __endi - __beg;
+	      __newoffo = __endo - __beg;
+	    }
+
+	  if ((__testin || __testboth)
+	      && __newoffi + __off >= 0 && __endi - __beg >= __newoffi + __off)
+	    {
+	      _M_in_cur = __beg + __newoffi + __off;
+	      __ret = pos_type(__newoffi);
+	    }
+	  if ((__testout || __testboth)
+	      && __newoffo + __off >= 0 && __endo - __beg >= __newoffo + __off)
+	    {
+	      _M_out_cur_move(__newoffo + __off - (_M_out_cur - __beg));
+	      __ret = pos_type(__newoffo);
+	    }
+	}
+      return __ret;
+    }
+
+  template <class _CharT, class _Traits, class _Alloc>
+    typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
+    basic_stringbuf<_CharT, _Traits, _Alloc>::
+    seekpos(pos_type __sp, ios_base::openmode __mode)
+    {
+      pos_type __ret =  pos_type(off_type(-1)); 
+      
+      if (_M_buf_size)
+	{
+	  off_type __pos = __sp; // Use streamoff operator to do conversion.
+	  char_type* __beg = NULL;
+	  char_type* __end = NULL;
+	  bool __testin = (ios_base::in & _M_mode & __mode) != 0;
+	  bool __testout = (ios_base::out & _M_mode & __mode) != 0;
+	  bool __testboth = __testin && __testout;
+	  __testin &= !(__mode & ios_base::out);
+	  __testout &= !(__mode & ios_base::in);
+	  
+	  // NB: Ordered.
+	  bool __testposi = false;
+	  bool __testposo = false;
+	  if (__testin || __testboth)
+	    {
+	      __beg = this->eback();
+	      __end = this->egptr();
+	      if (0 <= __pos && __pos <= __end - __beg)
+		__testposi = true;
+	    }
+	  if (__testout || __testboth)
+	    {
+	      __beg = this->pbase();
+	      __end = _M_buf + _M_buf_size;
+	      if (0 <= __pos && __pos <= __end - __beg)
+		__testposo = true;
+	    }
+	  if (__testposi || __testposo)
+	    {
+	      if (__testposi)
+		_M_in_cur = _M_in_beg + __pos;
+	      if (__testposo)
+		_M_out_cur_move((__pos) - (_M_out_cur - __beg));
+	      __ret = pos_type(off_type(__pos));
+	    }
+	}
+      return __ret;
+    }
+
+  // Inhibit implicit instantiations for required instantiations,
+  // which are defined via explicit instantiations elsewhere.  
+  // NB:  This syntax is a GNU extension.
+  extern template class basic_stringbuf<char>;
+  extern template class basic_istringstream<char>;
+  extern template class basic_ostringstream<char>;
+  extern template class basic_stringstream<char>;
+
+#ifdef _GLIBCPP_USE_WCHAR_T
+  extern template class basic_stringbuf<wchar_t>;
+  extern template class basic_istringstream<wchar_t>;
+  extern template class basic_ostringstream<wchar_t>;
+  extern template class basic_stringstream<wchar_t>;
+#endif
+} // namespace std
+
+#endif