/*

* Copyright (c) 1996-2009 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: 

*

*/

#include "r_rom.h"

#include "r_obey.h"

#include <e32std.h>

#include <e32std_private.h>

#include <iostream>

#include <fstream> 

#include <string.h>

const TInt KSRecBytesPerLine=32;		// max line = 1+1+2+8 + (32*2) + 2 = 78

LOCAL_C TInt enchex(TUint nibble)

//

// Return ascii hex character corresponding to nibble

//

    {

    nibble&=0xf;

    return(nibble<=9 ? '0'+nibble : 'A'-10+nibble);

    }

GLDEF_C TUint putbhx(TUint8 *buf,TUint byte)

//

// Write byte to buffer as two hex digits

//

    {

    *buf++ = (TUint8)enchex(byte>>4);

    *buf++ = (TUint8)enchex(byte);

	return byte&0xff;

    }

GLDEF_C TInt putmot(TUint8 *mcode, TUint8 *mdata,TUint mlen,TUint addr)

//

// Write SREC or S19 format to buffer at mcode from mlen bytes of binary data

// stored in buffer mdata. The code is given address addr.

// Returns the number of bytes written to mcode.

//

    {

    TUint8 *p,*q,*qend;

    TUint  sum,byte;

    p=mcode;

    *p='S';

#ifdef ALLOW_S_RECORD_THREE_BYTE_ADDRESSES

	// This is an optimisation which is useful for S-Record downloads over serial cable

	// but some S-Record tools don't support it, so it's off by default.

	if ((TUint)((addr>>24)&0xff) == 0)

		{

		*(p+1)='2';		// 3-byte address field

		sum=putbhx(p+=2,3+mlen+1);

 		}

	else

#endif

		{

		*(p+1)='3';		// 4-byte address field

		sum=putbhx(p+=2,4+mlen+1);

		sum+=putbhx(p+=2,(TUint)((addr>>24)&0xff));

		}

    sum+=putbhx(p+=2,(TUint)((addr>>16)&0xff));

    sum+=putbhx(p+=2,(TUint)((addr>>8)&0xff));

    sum+=putbhx(p+=2,(TUint)addr);

    q=mdata;

    qend=mdata+mlen;

    for (q=mdata;q<qend;q++)

		{

		byte=(*q);

		sum+=putbhx(p+=2,byte);

		}

	putbhx(p+=2,~sum);

    return((TUint)(p-mcode+2));

    }

void E32Rom::WriteSRecord(ofstream &of)

//

// Write the rom to a file in S record format and return its check sum.

//

	{

	TInt i;

	TUint8 sBuf[256];

	of << "S00600004844521B\n";

	TInt size=iObey->iRomSize;

	TUint8 *ptr=(TUint8 *)iHeader;

	for (i=0; i<size; i+=KSRecBytesPerLine)

		{

		TInt len;

		if ((i+KSRecBytesPerLine)>size)

			len=size-i;

		else

			len=KSRecBytesPerLine;

		TUint8 *pS=ptr+i;

		TInt l=putmot(sBuf,pS,len,i+iObey->iSRecordBase);

		of.write(reinterpret_cast<char *>(sBuf), l);

		of<<endl;

		}

	of << "S70500000000FA\n";		// Fixed address! - would need to compute the checksum

	}