gcc/libstdc++-v3/include/bits/basic_file.h
Benjamin Kosnik c0a26060f6 basic_file.h: Include basic_file_model.h.
2001-02-27  Benjamin Kosnik  <bkoz@redhat.com>

	libstdc++/1886
	* include/bits/basic_file.h: Include basic_file_model.h.
	* config/c_io_libio.cc: Move to...
	* config/basic_file_libio.cc: Here.
	* config/basic_file_libio.h: New file.
	* config/c_io_stdio.cc: Move to...
	* config/basic_file_stdio.cc: Here.
	* config/basic_file_stdio.h: New file.
	* config/c_io_libio.h: Tweak.
	* config/c_io_stdio.h: Tweak.
	* src/Makefile.am (build_headers): Add basic_file_model.h.
	(sources): Add basic_file.cc, remove c++io.cc.
	* src/Makefile.in: Regenerate.
	* acinclude.m4 (GLIBCPP_ENABLE_CSTDIO): Add support for
	basic_file_model.h and basic_file.cc.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* testsuite/27_io/filebuf.cc (test05): Add regression.

From-SVN: r40108
2001-02-28 03:20:36 +00:00

250 lines
7.5 KiB
C++

// Wrapper of C-language FILE struct -*- C++ -*-
// Copyright (C) 1999, 2000, 2001 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_BASIC_FILE
#define _CPP_BASIC_FILE 1
#pragma GCC system_header
#include <bits/c++config.h>
#include <bits/std_ios.h>
namespace std
{
// Ulrich is going to make some detailed comment here, explaining
// all this unpleasantness, providing detailed performance analysis
// as to why we have to do all this lame vtable hacking instead of a
// sane, function-based approach. This verbage will provide a clear
// and detailed description of the whole object-layout,
// vtable-swapping, sordid history of this hack.
template<typename _CharT>
struct __basic_file_base: public __c_file_type
{
virtual
~__basic_file_base() { };
virtual int
overflow(int __c = EOF) = 0;
virtual int
underflow() = 0;
virtual int
uflow() = 0;
virtual int
pbackfail(int __c) = 0;
virtual streamsize
xsputn(const _CharT* __s, streamsize __n) = 0;
virtual streamsize
xsgetn(_CharT* __s, streamsize __n) = 0;
virtual streamoff
seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode __mode = ios_base::in | ios_base::out) = 0;
virtual streamoff
seekpos(streamoff __pos,
ios_base::openmode __mode = ios_base::in | ios_base::out) = 0;
virtual streambuf*
setbuf(_CharT* __b, int __len) = 0;
virtual int
sync() = 0;
virtual int
doallocate() = 0;
virtual streamsize
sys_read(_CharT* __s, streamsize __n) = 0;
virtual streamsize
sys_write(const _CharT* __s, streamsize __n) = 0;
virtual streamoff
sys_seek(streamoff __off, ios_base::seekdir __way) = 0;
virtual int
sys_close() = 0;
virtual int
sys_stat(void* __v) = 0;
virtual int
showmanyc() = 0;
virtual void
imbue(void* __v) = 0;
};
// Some of these member functions are based on libio/filebuf.cc.
// Also note that the order and number of virtual functions has to precisely
// match the order and number in the _IO_jump_t struct defined in libioP.h.
template<typename _CharT>
#if _GLIBCPP_BASIC_FILE_INHERITANCE
class __basic_file: public __basic_file_base<_CharT>
#else
class __basic_file
#endif
{
#if _GLIBCPP_BASIC_FILE_ENCAPSULATION
int _M_fileno;
__c_file_type* _M_cfile;
#endif
#ifdef _GLIBCPP_USE_WCHAR_T
__c_wfile_type _M_wfile;
#endif /* !defined(_GLIBCPP_USE_WCHAR_T) */
public:
__basic_file(__c_lock* __lock = 0);
void
_M_open_mode(ios_base::openmode __mode, int& __p_mode, int& __rw_mode,
char* __c_mode);
// Eqivalent to the normal fopen function.
__basic_file*
open(const char* __name, ios_base::openmode __mode, int __prot = 0664);
// Used for opening the standard streams, cin, cout, cerr, clog,
// and their wide-stream equivalents. Instead of calling open, it
// just sets __c_file_type->_fileno and the respective _flags bits, and
// returns.
__basic_file*
sys_open(int __fd, ios_base::openmode __mode);
__basic_file*
close();
bool
is_open();
// Needed by ios_base::sync_with_stdio.
int get_fileno(void);
// NB: Must match FILE specific jump table starting here--this
// means all virtual functions starting with the dtor must match,
// slot by slot. For glibc-based dystems, this means the _IO_FILE
// as the FILE struct and _IO_jump_t as the jump table.
virtual
~__basic_file(); // Takes the place of __finish.
virtual int
overflow(int __c = EOF);
virtual int
underflow();
virtual int
uflow();
virtual int
pbackfail(int __c);
// A complex "write" function that sets all of __c_file_type's
// ponters and associated data members correctly and manages it's
// relation to the external byte sequence.
virtual streamsize
xsputn(const _CharT* __s, streamsize __n);
// A complex "read" function that sets all of __c_file_type's
// ponters and associated data members correctly and manages it's
// relation to the external byte sequence.
virtual streamsize
xsgetn(_CharT* __s, streamsize __n);
// A complex "seekoff" function that sets all of __c_file_type's
// ponters and associated data members correctly and manages it's
// relation to the external byte sequence.
virtual streamoff
seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode __mode = ios_base::in | ios_base::out);
// A complex "seekpos" function that sets all of __c_file_type's
// pointers and associated data members correctly and manages it's
// relation to the external byte sequence.
virtual streamoff
seekpos(streamoff __pos,
ios_base::openmode __mode = ios_base::in | ios_base::out);
virtual streambuf*
setbuf(_CharT* __b, int __len);
virtual int
sync();
virtual int
doallocate();
// A simple read function for the external byte sequence, that
// does no mucking around with or setting of the pointers or flags
// in __c_file_type.
virtual streamsize
sys_read(_CharT* __s, streamsize __n);
// A simple write function for the external byte sequence, that
// does no mucking around with or setting of the pointers or flags
// in __c_file_type.
virtual streamsize
sys_write(const _CharT* __s, streamsize __n);
// A simple seek function for the external byte sequence, that
// does no mucking around with or setting of the pointers or flags
// in __c_file_type.
virtual streamoff
sys_seek(streamoff __off, ios_base::seekdir __way);
virtual int
sys_close();
virtual int
sys_stat(void* __v);
virtual int
showmanyc();
virtual void
imbue(void* __v);
};
} // namespace std
// Now include the bits that are dependant on the underlying I/O
// model chosen at configure time.
#include <bits/basic_file_model.h>
#endif // _CPP_BASIC_FILE