/*

* Copyright (c) 2005-2009 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:

*/

/*

* ==============================================================================

*  Name        : getcwd.cpp

*  Part of     : libc library

*  Description : gets current working directory.

*

* ============================================================================

*/

#include "sysif.h"

#include <sys/errno.h> //error codes (ENOMEM, EINVAL)

#include "sysreent.h"

#include <string.h> //strlen

#include <stdlib.h>

extern "C" {

/*

Gets the path name of the current working directory.

If a buffer is specified, the path name is placed in that buffer,

and the address of the buffer is returned. 

*/

EXPORT_C char* getcwd (char *_buf, size_t _size)

	{

        if (_buf != 0 && _size == 0)

		{

		errno = EINVAL;

		return NULL;

		}

	char * _ourbuf = _buf;	

	if (_buf==0)

		{

		if (_size >= (KMaxTInt/2))

			{

			errno=ENOMEM;

			return _buf;

			}

		//coverity[alloc_fn]

		//coverity[assign]

		_ourbuf = (char *)	malloc(_size);

		if (_ourbuf == 0)

			{

			errno=ENOMEM;

			return _buf;

			}

		}

   //we are dealing with wide characters from here so we need a temporary buffer

	wchar_t tmpbuf[KMaxFullName];

	//coverity[leave_without_push]

	wchar_t *cret = _getcwd_r(&errno, tmpbuf, _size);

	if (cret)	//we have a path

		{

		//convert it to UTF8

		size_t x = wcstombs(_ourbuf, tmpbuf, _size);	//convert the buffer

		//remove the trailing backslash

              int cwd_len = strlen(_ourbuf);

		if(_ourbuf[cwd_len - 1] == '\\')

			_ourbuf[cwd_len - 1] = '\0';

		return _ourbuf;

		}

	//deal with the fact we may have allocated our own buffer

	if (_buf != _ourbuf)  //we allocated it.

		{

			free(_ourbuf);

       	}

	return NULL;

	}

} // extern "C"