/*
* Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "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: 
*
*/


#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;
	}


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