+++ /dev/null
-// Wrapper of C-language FILE struct -*- C++ -*-
-
-// Copyright (C) 2000, 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: 27.8 File-based streams
-//
-
-/** @file basic_file.h
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
- */
-
-#ifndef _CPP_BASIC_FILE
-#define _CPP_BASIC_FILE 1
-
-#pragma GCC system_header
-
-#include <bits/c++config.h>
-#include <ios>
-#include <libioP.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 verbiage 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>
- class __basic_file: public __basic_file_base<_CharT>
- {
-# ifdef _GLIBCPP_USE_WCHAR_T
- __c_wfile_type _M_wfile;
-# endif
-
- public:
- __basic_file(__c_lock* __lock = 0);
-
- void
- _M_open_mode(ios_base::openmode __mode, int& __p_mode, int& __rw_mode,
- char* __c_mode);
-
- // Equivalent 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
- // - for libio: __c_file_type->_fileno and the respective _flags bits
- // - for stdio: _M_cfile = __file and some internal flags
- // and returns.
- __basic_file*
- sys_open(__c_file_type* __file, ios_base::openmode __mode);
-
- _CharT
- sys_getc();
-
- _CharT
- sys_ungetc(_CharT);
-
- __basic_file*
- close();
-
- bool
- is_open();
-
- int
- fd();
-
- // 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
- // pointers and associated data members correctly and manages its
- // 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
- // pointers and associated data members correctly and manages its
- // 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
- // pointers and associated data members correctly and manages its
- // 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 its
- // 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);
- };
-
- // __basic_file<char> specializations
- template<>
- __basic_file<char>::__basic_file(__c_lock* __lock);
-
- template<>
- int
- __basic_file<char>::overflow(int __c);
-
- template<>
- int
- __basic_file<char>::underflow();
-
- template<>
- int
- __basic_file<char>::uflow();
-
- template<>
- int
- __basic_file<char>::pbackfail(int __c);
-
- template<>
- streamsize
- __basic_file<char>::xsputn(const char* __s, streamsize __n);
-
- template<>
- streamoff
- __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
- ios_base::openmode __mode);
-
- template<>
- streamoff
- __basic_file<char>::seekpos(streamoff __pos, ios_base::openmode __mode);
-
- template<>
- streambuf*
- __basic_file<char>::setbuf(char* __b, int __len);
-
- template<>
- int
- __basic_file<char>::sync();
-
- template<>
- int
- __basic_file<char>::doallocate();
-
- // __basic_file<wchar_t> specializations
-#ifdef _GLIBCPP_USE_WCHAR_T
- template<>
- __basic_file<wchar_t>::__basic_file(__c_lock* __lock);
-
- template<>
- int
- __basic_file<wchar_t>::overflow(int __c);
-
- template<>
- int
- __basic_file<wchar_t>::underflow();
-
- template<>
- int
- __basic_file<wchar_t>::uflow();
-
- template<>
- int
- __basic_file<wchar_t>::pbackfail(int __c);
-
- template<>
- streamsize
- __basic_file<wchar_t>::xsputn(const wchar_t* __s, streamsize __n);
-
- template<>
- streamoff
- __basic_file<wchar_t>::seekoff(streamoff __off, ios_base::seekdir __way,
- ios_base::openmode __mode);
-
- template<>
- streamoff
- __basic_file<wchar_t>::seekpos(streamoff __pos, ios_base::openmode __mode);
-
- template<>
- streambuf*
- __basic_file<wchar_t>::setbuf(wchar_t* __b, int __len);
-
- template<>
- int
- __basic_file<wchar_t>::sync();
-
- template<>
- int
- __basic_file<wchar_t>::doallocate();
-#endif
-
- template<typename _CharT>
- __basic_file<_CharT>::~__basic_file()
- { _IO_file_finish(this, 0); }
-
- template<typename _CharT>
- void
- __basic_file<_CharT>::_M_open_mode(ios_base::openmode __mode,
- int& __p_mode, int& __rw_mode,
- char* /*__c_mode*/)
- {
-#ifdef O_BINARY
- bool __testb = __mode & ios_base::binary;
-#endif
- bool __testi = __mode & ios_base::in;
- bool __testo = __mode & ios_base::out;
- bool __testt = __mode & ios_base::trunc;
- bool __testa = __mode & ios_base::app;
-
- if (!__testi && __testo && !__testt && !__testa)
- {
- __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
- __rw_mode = _IO_NO_READS;
- }
- if (!__testi && __testo && !__testt && __testa)
- {
- __p_mode = O_WRONLY | O_APPEND | O_CREAT;
- __rw_mode = _IO_NO_READS | _IO_IS_APPENDING;
- }
- if (!__testi && __testo && __testt && !__testa)
- {
- __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
- __rw_mode = _IO_NO_READS;
- }
- if (__testi && !__testo && !__testt && !__testa)
- {
- __p_mode = O_RDONLY;
- __rw_mode = _IO_NO_WRITES;
- }
- if (__testi && __testo && !__testt && !__testa)
- {
- __p_mode = O_RDWR;
- __rw_mode = 0;
- }
- if (__testi && __testo && __testt && !__testa)
- {
- __p_mode = O_RDWR | O_TRUNC | O_CREAT;
- __rw_mode = 0;
- }
-#ifdef O_BINARY
- if (__testb)
- __p_mode |= O_BINARY;
-#endif
- }
-
- template<typename _CharT>
- __basic_file<_CharT>*
- __basic_file<_CharT>::sys_open(__c_file_type* __f,
- ios_base::openmode __mode)
- {
- __basic_file* __ret = NULL;
- int __fd = fileno(__f);
- int __p_mode = 0;
- int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
- char __c_mode[4];
-
- _M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
-
- if (!_IO_file_is_open(this))
- {
- _fileno = __fd;
- _flags &= ~(_IO_NO_READS + _IO_NO_WRITES);
- _flags |= _IO_DELETE_DONT_CLOSE;
- _offset = _IO_pos_BAD;
- int __mask = _IO_NO_READS + _IO_NO_WRITES + _IO_IS_APPENDING;
- _IO_mask_flags(this, __rw_mode, __mask);
- }
-
- return __ret;
- }
-
- template<typename _CharT>
- __basic_file<_CharT>*
- __basic_file<_CharT>::open(const char* __name, ios_base::openmode __mode,
- int __prot)
- {
- __basic_file* __ret = NULL;
- int __p_mode = 0;
- int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
- char __c_mode[4];
-
- _M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
- if (!_IO_file_is_open(this))
- {
- __c_file_type* __f;
- __f = _IO_file_open(this, __name, __p_mode, __prot, __rw_mode, 0);
- __ret = __f ? this: NULL;
- }
- return __ret;
- }
-
- template<typename _CharT>
- bool
- __basic_file<_CharT>::is_open() { return _fileno >= 0; }
-
- template<typename _CharT>
- __basic_file<_CharT>*
- __basic_file<_CharT>::close()
- {
- return _IO_file_close_it(this) ? static_cast<__basic_file*>(NULL) : this;
- }
-
- template<typename _CharT>
- streamsize
- __basic_file<_CharT>::xsgetn(_CharT* __s, streamsize __n)
- { return _IO_file_xsgetn(this, __s, __n); }
-
- // NB: Unused.
- template<typename _CharT>
- streamsize
- __basic_file<_CharT>::sys_read(_CharT* __s, streamsize __n)
- { return _IO_file_read(this, __s, __n); }
-
- // NB: Unused.
- template<typename _CharT>
- streamsize
- __basic_file<_CharT>::sys_write(const _CharT* __s, streamsize __n)
- { return _IO_file_write(this, __s, __n); }
-
- // NB: Unused.
- template<typename _CharT>
- streamoff
- __basic_file<_CharT>::sys_seek(streamoff __pos, ios_base::seekdir __way)
- { return _IO_file_seek(this, __pos, __way); }
-
- // NB: Unused.
- template<typename _CharT>
- int
- __basic_file<_CharT>::sys_close()
- { return _IO_file_close(this); }
-
- // NB: Unused.
- template<typename _CharT>
- int
- __basic_file<_CharT>::sys_stat(void* __v)
- { return _IO_file_stat(this, __v); }
-
- // NB: Unused.
- template<typename _CharT>
- int
- __basic_file<_CharT>::showmanyc() { return EOF; }
-
- // NB: Unused.
- template<typename _CharT>
- void
- __basic_file<_CharT>::imbue(void* /*__v*/) { }
-} // namespace std
-
-#endif // _CPP_BASIC_FILE
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