// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// 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:

//

#ifdef __LINUX__

#include <unistd.h>

#else	// Windows specific

#include <io.h>

#endif

#include <fcntl.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include "h_utl.h"

TInt HFile::Open(const TText * const aFileName, TInt32 * const aFileHandle)

	{

#ifdef __LINUX__

	TInt32 hFile = open((const char *)aFileName, O_RDONLY );

#else

	TInt32 hFile = _open((const char *)aFileName, _O_RDONLY | _O_BINARY);

#endif

	if (hFile == -1)

		{

		switch (errno)

			{

		case EACCES:

			Print(EError,"Can't open file %s - access violation.\n",aFileName);

			break;

		case EEXIST:

			Print(EAlways,"Tried to create existing file %s\n",aFileName);

			break;

		case EINVAL:

			Print(EError,"Can't open file %s - invalid open flags.\n",aFileName);

			break;

		case EMFILE:

			Print(EError,"Can't open file %s - too many open files.\n",aFileName);

			break;

		case ENOENT:

			Print(EError,"Can't open file %s - file or path not found.\n",aFileName);

			break;

		default:

			Print(EError,"Can't open file %s, error %d (decimal).\n",aFileName,errno);

			break;

			}

		return errno;

		}

 	*aFileHandle = hFile;

	return 0;

	}	

/******************************************************************************/

TBool HFile::Read(const TInt32 aFileHandle, TAny * const aBuffer, const TUint32 aCount)

	{

	TInt32 bytesRead =  _read(aFileHandle, aBuffer, aCount);

	if (bytesRead != (TInt32)aCount)

		return EFalse;

	else

		return ETrue;

	}  

/******************************************************************************/

TBool HFile::Seek(const TInt32 aFileHandle, const TUint32 aOffset)

	{

	TInt32 newPos = _lseek(aFileHandle, aOffset, SEEK_SET);

	if (newPos == -1)

		return(EFalse);

	else

		return ETrue;

	}

/******************************************************************************/

TUint32 HFile::GetPos(const TInt32 aFileHandle)

	{

	TUint32 pos = _lseek(aFileHandle, 0, SEEK_CUR);

	return pos;

	}

/******************************************************************************/

TUint32 HFile::GetLength(TText *aName)

	{

	TInt32 handle;

	if (HFile::Open(aName, &handle)==0)

		{

		TUint32 size = _filelength(handle);

		HFile::Close(handle);

		return size;

		}

	else

		return 0;

	}

/******************************************************************************/

TUint32 HFile::GetLength(const TInt32 aFileHandle)

	{

	TUint32 size = _filelength(aFileHandle);

	return size;

	}

/******************************************************************************/

void HFile::Close(const TInt32 aFileHandle)

	{

	_close(aFileHandle);

	}

/******************************************************************************/

TUint32 HFile::Read(TText *aName, TAny *someMem)

 	{

	TInt32 handle;

	if (HFile::Open(aName, &handle)==0)

		{

		TUint32 size = HFile::GetLength(handle);

		if (HFile::Read(handle, someMem, size))

			{

			HFile::Close(handle);

			return size;

			}

		else 

			{

			HFile::Close(handle);

			return 0;

			}

		}

	else

		return 0;

	}

/******************************************************************************/