// File descriptor layer for filebuf -*- C++ -*-
-// Copyright (C) 2002 Free Software Foundation, Inc.
+// Copyright (C) 2002, 2003, 2004, 2005, 2009 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)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// 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.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// 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.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
/** @file ext/stdio_filebuf.h
* This file is a GNU extension to the Standard C++ Library.
*/
-#ifndef _EXT_STDIO_FILEBUF
-#define _EXT_STDIO_FILEBUF
+#ifndef _STDIO_FILEBUF_H
+#define _STDIO_FILEBUF_H 1
#pragma GCC system_header
+
#include <fstream>
-namespace __gnu_cxx
-{
+_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+
/**
- * @class stdio_filebuf ext/stdio_filebuf.h <ext/stdio_filebuf.h>
* @brief Provides a layer of compatibility for C/POSIX.
*
* This GNU extension provides extensions for working with standard C
{
public:
// Types:
- typedef _CharT char_type;
- typedef _Traits traits_type;
- typedef typename traits_type::int_type int_type;
- typedef typename traits_type::pos_type pos_type;
- typedef typename traits_type::off_type off_type;
-
- protected:
- // Stack-based buffer for unbuffered input.
- char_type _M_unbuf[4];
-
+ typedef _CharT char_type;
+ typedef _Traits traits_type;
+ typedef typename traits_type::int_type int_type;
+ typedef typename traits_type::pos_type pos_type;
+ typedef typename traits_type::off_type off_type;
+ typedef std::size_t size_t;
+
public:
+ /**
+ * deferred initialization
+ */
+ stdio_filebuf() : std::basic_filebuf<_CharT, _Traits>() {}
+
/**
* @param fd An open file descriptor.
* @param mode Same meaning as in a standard filebuf.
- * @param del Whether to close the file on destruction.
- * @param size Optimal or preferred size of internal buffer, in bytes.
+ * @param size Optimal or preferred size of internal buffer, in chars.
*
* This constructor associates a file stream buffer with an open
- * POSIX file descriptor. Iff @a del is true, then the associated
- * file will be closed when the stdio_filebuf is closed/destroyed.
+ * POSIX file descriptor. The file descriptor will be automatically
+ * closed when the stdio_filebuf is closed/destroyed.
*/
- stdio_filebuf(int __fd, std::ios_base::openmode __mode, bool __del,
- int_type __size);
+ stdio_filebuf(int __fd, std::ios_base::openmode __mode,
+ size_t __size = static_cast<size_t>(BUFSIZ));
/**
* @param f An open @c FILE*.
* @param mode Same meaning as in a standard filebuf.
- * @param size Optimal or preferred size of internal buffer, in bytes.
+ * @param size Optimal or preferred size of internal buffer, in chars.
* Defaults to system's @c BUFSIZ.
*
* This constructor associates a file stream buffer with an open
* C @c FILE*. The @c FILE* will not be automatically closed when the
* stdio_filebuf is closed/destroyed.
*/
- stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
- int_type __size = static_cast<int_type>(BUFSIZ));
+ stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
+ size_t __size = static_cast<size_t>(BUFSIZ));
/**
- * Possibly closes the external data stream, in the case of the file
- * descriptor constructor and @c del @c == @c true.
+ * Closes the external data stream if the file descriptor constructor
+ * was used.
*/
virtual
~stdio_filebuf();
* descriptor, so be careful.
*/
int
- fd()
- { return _M_file.fd(); }
+ fd() { return this->_M_file.fd(); }
+
+ /**
+ * @return The underlying FILE*.
+ *
+ * This function can be used to access the underlying "C" file pointer.
+ * Note that there is no way for the library to track what you do
+ * with the file, so be careful.
+ */
+ std::__c_file*
+ file() { return this->_M_file.file(); }
};
template<typename _CharT, typename _Traits>
template<typename _CharT, typename _Traits>
stdio_filebuf<_CharT, _Traits>::
- stdio_filebuf(int __fd, std::ios_base::openmode __mode, bool __del,
- int_type __size)
+ stdio_filebuf(int __fd, std::ios_base::openmode __mode, size_t __size)
{
- _M_file.sys_open(__fd, __mode, __del);
+ this->_M_file.sys_open(__fd, __mode);
if (this->is_open())
{
- _M_mode = __mode;
- if (__size > 0 && __size < 4)
- {
- // Specify unbuffered.
- _M_buf = _M_unbuf;
- _M_buf_size = __size;
- _M_buf_size_opt = 0;
- }
- else
- {
- _M_buf_size_opt = __size;
- _M_allocate_internal_buffer();
- }
- _M_set_indeterminate();
+ this->_M_mode = __mode;
+ this->_M_buf_size = __size;
+ this->_M_allocate_internal_buffer();
+ this->_M_reading = false;
+ this->_M_writing = false;
+ this->_M_set_buffer(-1);
}
}
template<typename _CharT, typename _Traits>
stdio_filebuf<_CharT, _Traits>::
- stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
- int_type __size)
+ stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
+ size_t __size)
{
- _M_file.sys_open(__f, __mode);
+ this->_M_file.sys_open(__f, __mode);
if (this->is_open())
{
- _M_mode = __mode;
- if (__size > 0 && __size < 4)
- {
- // Specify unbuffered.
- _M_buf = _M_unbuf;
- _M_buf_size = __size;
- _M_buf_size_opt = 0;
- }
- else
- {
- _M_buf_size_opt = __size;
- _M_allocate_internal_buffer();
- }
- _M_set_indeterminate();
+ this->_M_mode = __mode;
+ this->_M_buf_size = __size;
+ this->_M_allocate_internal_buffer();
+ this->_M_reading = false;
+ this->_M_writing = false;
+ this->_M_set_buffer(-1);
}
}
-} // namespace __gnu_cxx
-#endif /* _EXT_STDIO_FILEBUF */
+_GLIBCXX_END_NAMESPACE
+
+#endif
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