/*

* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

* FUNCTION

* <<fdopen>>---turn open file into a stream

* INDEX

* fdopen

* INDEX

* _fdopen_r

* ANSI_SYNOPSIS

* #include <stdio.h>

* FILE *fdopen(int <[fd]>, const char *<[mode]>);

* FILE *_fdopen_r(void *<[reent]>,

* int <[fd]>, const char *<[mode]>);

* TRAD_SYNOPSIS

* #include <stdio.h>

* FILE *fdopen(<[fd]>, <[mode]>)

* int <[fd]>;

* char *<[mode]>;

* FILE *_fdopen_r(<[reent]>, <[fd]>, <[mode]>)

* char *<[reent]>;

* int <[fd]>;

* char *<[mode]>);

* <<fdopen>> produces a file descriptor of type <<FILE *>>, from a

* descriptor for an already-open file (returned, for example, by the

* system subroutine <<open>> rather than by <<fopen>>).

* The <[mode]> argument has the same meanings as in <<fopen>>.

* RETURNS

* File pointer or <<NULL>>, as for <<fopen>>.

* PORTABILITY

* <<fdopen>> is ANSI.

* 

*

*/

#include <sys/types.h>

#include <stdlib_r.h>

#include <stdio_r.h>

#include <errno.h>

#include "LOCAL.H"

#define MaxFullName 255

/**

A reentrant version of fdopen().

*/

EXPORT_C FILE * _fdopen_r (struct _reent *ptr, int fd, const char *mode)

	{

	wchar_t _wmode[MaxFullName+1];

	if (-1 != mbstowcs(_wmode, mode, MaxFullName))

		return _wfdopen_r(ptr, fd, _wmode);

	ptr->_errno = EILSEQ;

	return NULL;

	}

/**

A reentrant version of wfdopen().

*/

EXPORT_C FILE * _wfdopen_r (struct _reent *ptr, int fd, const wchar_t *mode)

{

  register FILE *fp;

  int flags, oflags;

  if ((flags = __sflags (ptr, mode, &oflags)) == 0)

    return 0;

  /* make sure the mode the user wants is a subset of the actual mode */

#ifdef F_GETFL

  if ((fdflags = _fcntl (fd, F_GETFL, 0)) < 0)

    return 0;

  fdmode = fdflags & O_ACCMODE;

  if (fdmode != O_RDWR && (fdmode != (oflags & O_ACCMODE)))

    {

      ptr->_errno = EBADF;

      return 0;

    }

#endif

  if ((fp = __sfp (ptr)) == 0)

    return 0;

  fp->_flags = (short)flags;

  /*

   * If opened for appending, but underlying descriptor

   * does not have O_APPEND bit set, assert __SAPP so that

   * __swrite() will lseek to end before each write.

   */

#ifdef F_GETFL

  if ((oflags & O_APPEND) && !(fdflags & O_APPEND))

#endif

    fp->_flags |= __SAPP;

  fp->_file = (short)fd;

  fp->_cookie = (void*) fp;

#undef _read

#undef _write

#undef _seek

#undef _close

  fp->_read = __sread;

  fp->_write = __swrite;

  fp->_seek = __sseek;

  fp->_close = __sclose;

  return fp;

}

#ifndef _REENT_ONLY

/**

This function associates a stream with an open file descriptor. 

A stream is a pointer to a FILE structure that contains information about a file.

A stream permits user-controlled buffering and formatted input and output.

@return a FILE pointer to the control block for the new stream.

@param fd The open file descriptor on which to open a stream.

@param mode The access mode for the stream. 

*/

EXPORT_C FILE * fdopen (int fd, const char *mode)

{

  return _fdopen_r (_REENT, fd, mode);

}

/**

A wide-character version of fdopen()

*/

EXPORT_C FILE * wfdopen (int fd, const wchar_t *mode)

{

  return _wfdopen_r (_REENT, fd, mode);

}

#endif