/*

 * 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