libstdc++-v3: New directory.

2000-04-21  Benjamin Kosnik  <bkoz@redhat.com>

	* libstdc++-v3: New directory.

From-SVN: r33317

1 files changed, 568 insertions, 0 deletions

diff --git a/libstdc++-v3/bits/fstream.tcc b/libstdc++-v3/bits/fstream.tcc
new file mode 100644
index 0000000..52d71f5
--- /dev/null
+++ b/libstdc++-v3/bits/fstream.tcc
@@ -0,0 +1,568 @@
+// File based streams -*- C++ -*-
+
+// Copyright (C) 1997-1999 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: 27.8  File-based streams
+//
+
+#ifndef _CPP_BITS_FSTREAM_TCC
+#define _CPP_BITS_FSTREAM_TCC 1
+
+namespace std
+{
+  template<typename _CharT, typename _Traits>
+    void
+    basic_filebuf<_CharT, _Traits>::
+    _M_init_filebuf(void)
+    {
+      _M_buf_unified = true; // Tie input to output for basic_filebuf.
+      _M_buf_size = static_cast<int_type>(BUFSIZ * sizeof(char_type)); 
+      try {
+	_M_file = new __file_type(&_M_lock);
+      }
+      catch(...) {
+	delete _M_file;
+	throw;
+      }
+    }
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::
+    basic_filebuf() 
+    : __streambuf_type(), _M_file(NULL), _M_last_overflowed(false), 
+    _M_state_cur(), _M_state_beg() 
+    { _M_fcvt = &use_facet<__codecvt_type>(this->getloc()); }
+
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::
+    basic_filebuf(int __fd, const char* /*__name*/, ios_base::openmode __mode)
+    : __streambuf_type(), _M_last_overflowed(false),
+    _M_state_cur(), _M_state_beg()
+    {
+      _M_fcvt = &use_facet<__codecvt_type>(this->getloc());
+      _M_init_filebuf();
+      _M_file->sys_open(__fd, __mode);
+      if (this->is_open() && _M_buf_size)
+	{
+	  _M_mode = __mode;
+	  // XXX So that istream::getc() will only need to get 1 char,
+	  // as opposed to BUF_SIZE.
+	  if (__fd == 0)
+	    _M_buf_size = 1;
+
+	  try {
+	    _M_buf = new char_type[_M_buf_size];
+	  }
+	  catch(...) {
+	    delete [] _M_buf;
+	    throw;
+	  }
+
+	  this->_M_set_indeterminate();
+	}
+   }
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::__filebuf_type* 
+    basic_filebuf<_CharT, _Traits>::
+    open(const char* __s, ios_base::openmode __mode)
+    {
+      __filebuf_type *__retval = NULL;
+      if (!this->is_open())
+	{
+	  _M_init_filebuf();
+	  _M_file->open(__s, __mode);
+	  if (this->is_open() && _M_buf_size)
+	    {
+	      _M_mode = __mode;
+
+	      try {
+		_M_buf = new char_type[_M_buf_size];
+	      }
+	      catch(...) {
+		delete [] _M_buf;
+		throw;
+	      }
+	      
+	      // For time being, set both (in/out) sets  of pointers.
+	      _M_set_indeterminate();
+	      if (__mode & ios_base::ate
+		  && this->seekoff(0, ios_base::end, __mode) < 0)
+		this->close();
+	      __retval = this;
+	    }
+	}
+      return __retval;
+    }
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::__filebuf_type* 
+    basic_filebuf<_CharT, _Traits>::
+    close()
+    {
+      __filebuf_type *__retval = NULL;
+      if (this->is_open())
+	{
+	  bool __testput = _M_out_cur && _M_out_beg < _M_out_end;
+	  if (__testput)
+	    _M_really_overflow(traits_type::eof());
+	  
+#if 0
+	  // XXX not done
+	  if (_M_last_overflowed)
+	    {
+	      _M_output_unshift();
+	      _M_really_overflow(traits_type::eof());
+	    }
+#endif
+	  
+	  if (_M_file->close())
+	    {
+	      _M_mode = ios_base::openmode(0);
+	      if (_M_buf_size)
+		delete [] _M_buf;
+	      _M_buf = NULL;
+	      this->setg(NULL, NULL, NULL);
+	      this->setp(NULL, NULL);
+	      __retval = this;
+	    }
+	}
+      _M_last_overflowed = false;	
+      return __retval;
+    }
+
+  template<typename _CharT, typename _Traits>
+    streamsize 
+    basic_filebuf<_CharT, _Traits>::
+    showmanyc()
+    {
+      streamsize __retval = -1;
+      bool __testin = _M_mode & ios_base::in;
+
+      if (__testin)
+	{
+	  bool __testeof = false;
+	  if (_M_in_cur >= _M_in_end)
+	    __testeof = this->underflow() == traits_type::eof();
+	  if (!__testeof)
+	    __retval = (_M_in_end - _M_in_cur) / sizeof(char_type);
+	}
+      _M_last_overflowed = false;	
+      return __retval;
+    }
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::int_type 
+    basic_filebuf<_CharT, _Traits>::
+    underflow()
+    {
+      int_type __retval = traits_type::eof();
+      bool __testget = _M_in_cur && _M_in_beg < _M_in_cur;
+      bool __testinit = _M_is_indeterminate();
+      bool __testout = _M_mode & ios_base::out;
+      bool __testin = _M_mode & ios_base::in;
+      
+      if (__testin)
+	{
+	  // Sync internal and external buffers.
+	  // NB: __testget -> __testput as _M_buf_unified here.
+	  if (__testget)
+	    {
+	      if (__testout)
+		_M_really_overflow();
+	      else 
+		_M_file->seekoff(_M_in_cur - _M_in_beg, ios_base::cur, 
+				 ios_base::in);
+	    }
+
+	  if (__testinit || __testget)
+	    {
+	      // Part one: (Re)fill external buf (_M_file->_IO_*) from
+	      // external byte sequence (whatever physical byte sink or
+	      // FILE actually is.)
+	      char __conv_buf[_M_buf_size];
+	      int_type __size = _M_file->xsgetn(__conv_buf, _M_buf_size);
+	      
+	      // Part two: (Re)fill internal buf contents from external buf.
+	      if (0 < __size)
+		{
+		  _M_set_determinate(__size);
+		  
+		  char* __conv_cur = __conv_buf;
+		  _M_state_beg = _M_state_cur;
+		  __res_type __r = _M_fcvt->in(_M_state_cur, 
+					       __conv_buf,
+					       __conv_buf + __size,
+					 const_cast<const char*&>(__conv_cur), 
+					      _M_in_beg, _M_in_end, _M_in_cur);
+	      
+		  if (__r == codecvt_base::partial)
+		    {
+		      // XXX Retry with larger _M_buf size.
+		    }
+		  
+		  // Set pointers to internal and external buffers
+		  // correctly. . .
+		  if (__r != codecvt_base::error)
+		    {
+		      if (__testout)
+			_M_out_cur = _M_in_cur;
+		      __retval = traits_type::to_int_type(*_M_in_cur);
+		    }
+
+		  // Part three: Sync the current internal buffer
+		  // position with the (now overshot) external buffer
+		  // position.  
+		  pos_type __p = _M_file->seekoff(0 - __size, ios_base::cur, 
+						  ios_base::in);
+		  if (__p._M_position() == -1)
+		    {
+		      // XXX Something is wrong, do error checking.
+		    }
+		}
+	    }	      
+	}
+      _M_last_overflowed = false;	
+      return __retval;
+    }
+  
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::int_type 
+    basic_filebuf<_CharT, _Traits>::
+    pbackfail(int_type __i)
+    {
+      int_type __retval = traits_type::eof();
+      char_type __c = traits_type::to_char_type(__i);
+      bool __testeof = traits_type::eq_int_type(__i, traits_type::eof());
+      bool __testout = _M_mode & ios_base::out;
+      bool __testin = _M_mode & ios_base::in;
+
+      if (__testin)
+	{
+	  if (!_M_is_indeterminate())	  
+	    {
+	      bool __testpb = _M_in_beg < _M_in_cur;
+	      bool __testeq = traits_type::eq(__c, this->gptr()[-1]);
+
+	      // Try to put back __c into input sequence in one of three ways.
+	      // Order these tests done in is unspecified by the standard.
+	      if (!__testeof && __testpb && __testeq)
+		{
+		  --_M_in_cur;
+		  if (__testout)
+		    --_M_out_cur;
+		  __retval = __i;
+		}
+	      else if (!__testeof && __testpb && __testout)
+		{
+		  --_M_in_cur;
+		  if (__testout)
+		    --_M_out_cur;
+		  *_M_in_cur = __c;
+		  __retval = __i;
+		}
+	      else if (__testeof && __testpb)
+		{
+		  --_M_in_cur;
+		  if (__testout)
+		    --_M_out_cur;
+		  __retval = traits_type::not_eof(__i);
+		}
+	    }
+	  else
+	    {
+	      // Need to make a putback position available.
+	      this->seekoff(-1, ios_base::cur);
+	      this->underflow();
+	      if (!__testeof)
+		{
+		  *_M_in_cur = __c;
+		  __retval = __c;
+		}
+	      else
+		__retval = traits_type::not_eof(__i);
+	    }
+	}
+      _M_last_overflowed = false;	
+      return __retval;
+    }
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::int_type 
+    basic_filebuf<_CharT, _Traits>::
+    overflow(int_type __c)
+    {
+      int_type __retval = traits_type::eof();
+      bool __testpos = _M_out_cur && _M_out_cur >= _M_buf + _M_buf_size;
+      bool __testout = _M_mode & ios_base::out;
+      
+      if (__testout)
+	{
+	  if (!__testpos)
+	    {
+	      *_M_out_cur = traits_type::to_char_type(__c);
+	      _M_buf_bump(1);
+	      __retval = traits_type::not_eof(__c);
+	    }
+	  else 
+	    __retval = this->_M_really_overflow(__c);
+	}
+
+      _M_last_overflowed = false;    // Set in _M_really_overflow, below.
+      return __retval;
+    }
+  
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::int_type 
+    basic_filebuf<_CharT, _Traits>::
+    _M_really_overflow(int_type __c)
+    {
+      int_type __retval = traits_type::eof();
+      bool __testput = _M_out_cur && _M_out_beg < _M_out_end;
+      bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());
+      
+      if (__testput)
+	{
+	  // Part one: Allocate temporary conversion buffer on
+	  // stack. Convert internal buffer plus __c (ie,
+	  // "pending sequence") to temporary conversion buffer.
+	  int __plen = _M_out_end - _M_out_beg;
+	  char_type __pbuf[__plen + sizeof(char_type)];	      
+	  traits_type::copy(__pbuf, this->pbase(), __plen);
+	  if (!__testeof)
+	    {
+	      __pbuf[__plen] = traits_type::to_char_type(__c);
+	      ++__plen;
+	    }
+
+	  char_type* __pend;
+	  char __conv_buf[__plen];
+	  char* __conv_end;
+	  _M_state_beg = _M_state_cur;
+
+	  __res_type __r = _M_fcvt->out(_M_state_cur, 
+					__pbuf, __pbuf + __plen,
+					const_cast<const char_type*&>(__pend),
+					__conv_buf, __conv_buf + __plen,
+					__conv_end);
+	  
+	  // Part two: (Re)spill converted "pending sequence"
+	  // contents (now in temporary conversion buffer) to
+	  // external buffer (_M_file->_IO_*) using
+	  // _M_file->sys_write(), and do error (minimal) checking.
+	  if (__r != codecvt_base::error)
+	    {
+	      streamsize __r = _M_file->xsputn(__conv_buf, __plen);
+	      // NB: Need this so that external byte sequence reflects
+	      // internal buffer.
+	      _M_file->sync();
+	      if (__r == __plen)
+		{
+		  _M_set_indeterminate();
+		  __retval = traits_type::not_eof(__c);
+		}
+	    }
+	}	      
+      _M_last_overflowed = true;	
+      return __retval;
+    }
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::pos_type
+    basic_filebuf<_CharT, _Traits>::
+    seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __mode)
+    {
+      pos_type __retval =  pos_type(off_type(-1)); 
+      bool __testopen = this->is_open();
+      bool __testin = __mode & ios_base::in && _M_mode & ios_base::in;
+      bool __testout = __mode & ios_base::out && _M_mode & ios_base::out;
+      int __width = _M_fcvt->encoding();
+      if (__width < 0)
+	__width = 0;
+      bool __testfail = __off != 0  && __width <= 0;
+      
+      if (__testopen && !__testfail && (__testin || __testout))
+	{
+	  if (__way != ios_base::cur || __off != 0)
+	    { 
+	      off_type __computed_off = __width * __off;
+	      
+	      bool __testget = _M_in_cur && _M_in_beg < _M_in_end;
+	      bool __testput = _M_out_cur && _M_out_beg < _M_out_end;
+	      // Sync the internal and external streams.
+	      // out
+	      if (__testput || _M_last_overflowed)
+		{
+		  // Part one: update the output sequence.
+		  this->sync();
+		  // Part two: output unshift sequence.
+		  _M_output_unshift();
+		}
+	      //in
+	      // NB: underflow() rewinds the external buffer.
+	      else if (__testget && __way == ios_base::cur)
+		__computed_off += _M_in_cur - _M_in_beg;
+	  
+	      __retval = _M_file->seekoff(__computed_off, __way, __mode);
+	      if (__retval._M_position() == -1)
+		__retval == pos_type(off_type(-1)); 
+	      _M_set_indeterminate();
+	    }
+	  // NB: Need to do this in case _M_file in indeterminate
+	  // state, ie _M_file->_offset == -1
+	  else
+	    {
+	      __retval = _M_file->seekoff(__off, ios_base::cur, __mode);
+	      __retval += max(_M_out_cur, _M_in_cur) - _M_buf;
+	    }
+	}
+      _M_last_overflowed = false;	
+      return __retval;
+    }
+
+  template<typename _CharT, typename _Traits>
+    basic_filebuf<_CharT, _Traits>::pos_type
+    basic_filebuf<_CharT, _Traits>::
+    seekpos(pos_type __pos, ios_base::openmode __mode)
+    {
+      pos_type __retval;
+      off_type __off = __pos;
+
+      __retval = this->seekoff(__off, ios_base::beg, __mode); 
+
+      _M_last_overflowed = false;	
+      return __retval;
+    }
+
+  template<typename _CharT, typename _Traits>
+    void 
+    basic_filebuf<_CharT, _Traits>::
+    _M_output_unshift()
+    {
+#if 0
+      // XXX Not complete, or correct.
+      int __width = _M_fcvt->encoding();
+      
+      if (__width < 0)
+	{
+	  // Part one: call codecvt::unshift
+	  int __unsft_len = 0;
+	  char_type __unsft_buf[_M_buf_size];
+	    char_type* __unsft_cur; // XXX Set to external buf.
+	    _M_state_beg = _M_state_cur;
+	    __res_type __r = _M_fcvt->unshift(_M_state_cur, 
+					      __unsft_buf,
+					      __unsft_buf + _M_buf_size,
+					      __unsft_cur);
+	    
+	    // Note, for char_type == char, wchar_t unshift
+	    // should store no charachers.
+	    if (__r == codecvt_base::ok || __r == codecvt_base::noconv)
+	      __unsft_len = __unsft_cur - __unsft_buf;
+	    
+	    // "Output the resulting sequence."
+	    if (__unsft_len)
+	      {
+		int __plen = _M_out_cur - _M_out_beg;
+		int __rlen = __plen  + __unsft_len;
+		char_type __rbuf[__rlen];
+		char_type* __rend;
+		traits_type::copy(__rbuf, this->pbase(), __plen);
+		traits_type::copy(__rbuf + __plen, __unsft_buf, 
+				  __unsft_len);
+
+		char __conv_buf[__rlen];
+		char* __conv_end;
+		
+		_M_state_beg = _M_state_cur; // XXX Needed?
+		__r = _M_fcvt->out(_M_state_cur, 
+				  __rbuf, __rbuf + __rlen,
+				  const_cast<const char_type*&>(__rend),
+				  __conv_buf, 
+				  __conv_buf + __rlen,
+				  __conv_end);
+		
+		if (__r != codecvt_base::error)
+		  {
+		    streamsize __r = _M_file->xsputn(__conv_buf, 
+						     __rlen);
+		    if (__r == __rlen)
+		      {
+			_M_out_cur = _M_out_beg;
+			if (_M_mode & ios_base::in)
+			  _M_in_cur = _M_out_cur;
+		      }
+		    else
+		      {
+			// XXX Throw "wig out and die exception?"
+		      }
+		  }
+	      }
+	  }
+#endif
+    }
+
+  template<typename _CharT, typename _Traits>
+    void
+    basic_filebuf<_CharT, _Traits>::
+    imbue(const locale& __loc)
+    {
+      bool __testbeg = gptr() == eback() && pptr() == pbase();
+      bool __teststate = _M_fcvt->encoding() == -1;
+      
+      _M_locale_set = true;
+      if (__testbeg && !__teststate && _M_locale_buf != __loc)
+	{
+	  // XXX Will need to save these older values.
+	  _M_locale_buf = __loc;
+	  _M_fcvt = &use_facet<__codecvt_type>(_M_locale_buf);
+	  // XXX Necessary?
+	  _M_fctype_buf = &use_facet<__ctype_type>(_M_locale_buf); 
+	}
+      // NB this may require the reconversion of previously
+      // converted chars. This in turn may cause the reconstruction
+      // of the original file. YIKES!!
+      // XXX The part in the above comment is not done.
+      _M_last_overflowed = false;	
+    }
+  
+} // namespace std
+
+#endif // _CPP_BITS_FSTREAM_TCC
+
+
+
+
+
+
+
+
+
+