sl@0: // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include "US_STD.H"
sl@0: 
sl@0: TInt TPtrInput::PushL(const TAny* aPtr,TInt aMaxLength)
sl@0: //
sl@0: // Accept the data, copying it to the buffer pointed to.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aMaxLength>=0,Panic(EStreamPushLengthNegative));
sl@0: 	__ASSERT_DEBUG(aMaxLength>0,Panic(EStreamPushNoTransfer));
sl@0: 	iPtr=Mem::Copy(iPtr,aPtr,aMaxLength);
sl@0: 	return aMaxLength;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TPtrInput::ReadFromL(MStreamBuf&,TStreamTransfer aTransfer)
sl@0: //
sl@0: // This input is passive.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aTransfer>0,Panic(EStreamReadNoTransfer));
sl@0: 	return aTransfer;
sl@0: 	}
sl@0: 
sl@0: TInt TPtrOutput::PullL(TAny* aPtr,TInt aMaxLength)
sl@0: //
sl@0: // Produce data from the buffer pointed to.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aMaxLength>=0,Panic(EStreamPullLengthNegative));
sl@0: 	__ASSERT_DEBUG(aMaxLength>0,Panic(EStreamPullNoTransfer));
sl@0: 	Mem::Copy(aPtr,iPtr,aMaxLength);
sl@0: 	iPtr+=aMaxLength;
sl@0: 	return aMaxLength;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TPtrOutput::WriteToL(MStreamBuf&,TStreamTransfer aTransfer)
sl@0: //
sl@0: // This output is passive.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aTransfer>0,Panic(EStreamWriteNoTransfer));
sl@0: 	return aTransfer;
sl@0: 	}
sl@0: 
sl@0: TInt TNullInput::PushL(const TAny*,TInt aMaxLength)
sl@0: //
sl@0: // Accept and discard the data.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aMaxLength>=0,Panic(EStreamPushLengthNegative));
sl@0: 	__ASSERT_DEBUG(aMaxLength>0,Panic(EStreamPushNoTransfer));
sl@0: 	return aMaxLength;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TNullInput::ReadFromL(MStreamBuf& aSource,TStreamTransfer aTransfer)
sl@0: //
sl@0: // Read and discard data from aSource using a temporary buffer.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aTransfer>0,Panic(EStreamReadNoTransfer));
sl@0: 	do
sl@0: 		{
sl@0: 		TUint8 buf[KDefaultIoBufSize];
sl@0: 		TInt len=aSource.ReadL(buf,aTransfer[sizeof(buf)]);
sl@0: 		__ASSERT_DEBUG(len>=0&&len<=aTransfer[sizeof(buf)],Panic(EStreamReadInBreach));
sl@0: 		if (len==0)
sl@0: 			break;
sl@0: //
sl@0: 		aTransfer-=len;
sl@0: 		} while (aTransfer>0);
sl@0: 	return aTransfer;
sl@0: 	}
sl@0: 
sl@0: TInt TSourceOutput::PullL(TAny* aPtr,TInt aMaxLength)
sl@0: //
sl@0: // Pull up to aMaxLength bytes of data from this output's source.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aMaxLength>=0,Panic(EStreamPullLengthNegative));
sl@0: 	__ASSERT_DEBUG(aMaxLength>0,Panic(EStreamPullNoTransfer));
sl@0: 	__ASSERT_DEBUG(iSrc!=NULL,User::Invariant());
sl@0: //
sl@0: 	TPtrInput input(aPtr);
sl@0: 	TInt len=iSrc->ReadL(input,aMaxLength);
sl@0: 	__ASSERT_DEBUG(len>=0&&len<=aMaxLength,Panic(EStreamReadInBreach));
sl@0: 	return len;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TSourceOutput::WriteToL(MStreamBuf& aSink,TStreamTransfer aTransfer)
sl@0: //
sl@0: // Write data from this output's source to aSink using a temporary buffer.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aTransfer>0,Panic(EStreamWriteNoTransfer));
sl@0: 	__ASSERT_DEBUG(iSrc!=NULL,User::Invariant());
sl@0: 	do
sl@0: 		{
sl@0: 		TUint8 buf[KDefaultIoBufSize];
sl@0: 		TInt len=iSrc->ReadL(buf,aTransfer[sizeof(buf)]);
sl@0: 		__ASSERT_DEBUG(len>=0&&len<=aTransfer[sizeof(buf)],Panic(EStreamReadInBreach));
sl@0: 		if (len==0)
sl@0: 			break;
sl@0: //
sl@0: 		aSink.WriteL(buf,len);
sl@0: 		aTransfer-=len;
sl@0: 		} while (aTransfer>0);
sl@0: 	return aTransfer;
sl@0: 	}
sl@0: 
sl@0: TInt TFilterInput::PushL(const TAny* aPtr,TInt aMaxLength)
sl@0: //
sl@0: // Put up to aMaxLength bytes of data through the filter.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aMaxLength>=0,Panic(EStreamPushLengthNegative));
sl@0: 	__ASSERT_DEBUG(aMaxLength>0,Panic(EStreamPushNoTransfer));
sl@0: 	__ASSERT_DEBUG(!Eof(),Panic(EStreamReadInBreach));
sl@0: 	__ASSERT_DEBUG(iFltr!=NULL&&iLeft>=0,User::Invariant());
sl@0: 	if (Done())
sl@0: 		return 0;
sl@0: //
sl@0: 	const TUint8* from=(TUint8*)aPtr;
sl@0: 	TInt len=iFltr->FilterL(iPtr,iLeft,from,from+aMaxLength);
sl@0: 	__ASSERT_DEBUG(len>=0&&len<=iLeft,Panic(EStreamFilterInBreach));
sl@0: 	__ASSERT_DEBUG(from>=(TUint8*)aPtr&&from<=(TUint8*)aPtr+aMaxLength,Panic(EStreamFilterInBreach));
sl@0: 	__ASSERT_DEBUG(len==iLeft||from==(TUint8*)aPtr+aMaxLength,Panic(EStreamFilterInBreach));
sl@0: 	iPtr+=len;
sl@0: 	iLeft-=len;
sl@0: 	return from-(TUint8*)aPtr;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TFilterInput::ReadFromL(MStreamBuf& aSource,TStreamTransfer aTransfer)
sl@0: //
sl@0: // Put data read from aSource through the filter using a temporary buffer.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aTransfer>0,Panic(EStreamReadNoTransfer));
sl@0: 	__ASSERT_DEBUG(iFltr!=NULL&&iLeft>=0,User::Invariant());
sl@0: 	if (Done())
sl@0: 		return aTransfer;
sl@0: //
sl@0: 	TUint8 buf[KFilterIoBufSize];
sl@0: 	TInt cap=aTransfer[Min(iFltr->Capacity(iLeft),sizeof(buf))];
sl@0: 	const TUint8* end=buf+(cap==0?0:aSource.ReadL(buf,cap));
sl@0: 	__ASSERT_DEBUG(end>=buf&&end<=buf+cap&&(!Eof()||end==buf),Panic(EStreamReadInBreach));
sl@0: 	const TUint8* from=buf;
sl@0: 	TInt len=iFltr->FilterL(iPtr,iLeft,from,end);
sl@0: 	__ASSERT_DEBUG(len>=0&&len<=iLeft,Panic(EStreamFilterInBreach));
sl@0: 	__ASSERT_DEBUG(from==end,Panic(EStreamFilterInBreach));
sl@0: 	if (end==buf && len==0)	// no input && no output, => end of stream
sl@0: 		iPtr=NULL;
sl@0: 	else
sl@0: 		iPtr+=len;
sl@0: 	iLeft-=len;
sl@0: 	return aTransfer-(from-buf);
sl@0: 	}
sl@0: 
sl@0: TInt TFilterOutput::PullL(TAny* aPtr,TInt aMaxLength)
sl@0: //
sl@0: // Pull up to aMaxLength bytes of data through the filter.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aMaxLength>=0,Panic(EStreamPullLengthNegative));
sl@0: 	__ASSERT_DEBUG(aMaxLength>0,Panic(EStreamPullNoTransfer));
sl@0: 	__ASSERT_DEBUG(iFltr!=NULL&&iFrom!=NULL&&iFrom<=iEnd,User::Invariant());
sl@0: 	if (Done())
sl@0: 		return 0;
sl@0: //
sl@0: 	__DEBUG(const TUint8* from=iFrom);
sl@0: 	TInt len=iFltr->FilterL(aPtr,aMaxLength,iFrom,iEnd);
sl@0: 	__ASSERT_DEBUG(len>=0&&len<=aMaxLength,Panic(EStreamFilterInBreach));
sl@0: 	__ASSERT_DEBUG(iFrom>=from&&iFrom<=iEnd,Panic(EStreamFilterInBreach));
sl@0: 	__ASSERT_DEBUG(len==aMaxLength||iFrom==iEnd,Panic(EStreamFilterInBreach));
sl@0: 	return len;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TFilterOutput::WriteToL(MStreamBuf& aSink,TStreamTransfer aTransfer)
sl@0: //
sl@0: // Write data put through the filter to aSink using a temporary buffer.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_DEBUG(aTransfer>0,Panic(EStreamWriteNoTransfer));
sl@0: 	__ASSERT_DEBUG(iFltr!=NULL&&iFrom!=NULL&&iFrom<=iEnd,User::Invariant());
sl@0: 	if (Done())
sl@0: 		return aTransfer;
sl@0: //
sl@0: 	TUint8 buf[KFilterIoBufSize];
sl@0: 	__DEBUG(const TUint8* from=iFrom);
sl@0: 	TInt len=iFltr->FilterL(buf,aTransfer[sizeof(buf)],iFrom,iEnd);
sl@0: 	__ASSERT_DEBUG(len>=0&&len<=aTransfer[sizeof(buf)],Panic(EStreamFilterInBreach));
sl@0: 	__ASSERT_DEBUG(iFrom>=from&&iFrom<=iEnd,Panic(EStreamFilterInBreach));
sl@0: 	__ASSERT_DEBUG(len==aTransfer[sizeof(buf)]||iFrom==iEnd,Panic(EStreamFilterInBreach));
sl@0: 	if (len>0)
sl@0: 		aSink.WriteL(buf,len);
sl@0: 	return aTransfer-len;
sl@0: 	}
sl@0: 
sl@0: TDelimitedInput8::TDelimitedInput8(TUint8* aPtr,TInt aLength,TChar aDelim)
sl@0: 	: iPtr(aPtr),iLeft(aLength),iDelim(aDelim)
sl@0: 	{}
sl@0: 
sl@0: TInt TDelimitedInput8::PushL(const TAny* aPtr,TInt aMaxLength)
sl@0: //
sl@0: // Push 8-bit text into this input buffer up to the first occurrence of the delimiter.
sl@0: //
sl@0: 	{
sl@0: 	TInt len=Min(aMaxLength,iLeft);
sl@0: 	TInt d=TPtrC8((TUint8*)aPtr,len).Locate(iDelim)+1;
sl@0: 	if (d<=0)
sl@0: 		{
sl@0: 		d=len;
sl@0: 		iLeft-=len;
sl@0: 		}
sl@0: 	else
sl@0: 		iLeft=0;
sl@0: 	iPtr=(TUint8*)Mem::Copy(iPtr,aPtr,d);
sl@0: 	return d;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TDelimitedInput8::ReadFromL(MStreamBuf& aSource,TStreamTransfer aTransfer)
sl@0: //
sl@0: // Read a single 8-bit text character from aSource, testing it against the delimiter.
sl@0: //
sl@0: 	{
sl@0: 	if (Done())
sl@0: 		return aTransfer;
sl@0: //
sl@0: 	RReadStream stream(&aSource);
sl@0: 	TUint8 c=stream.ReadUint8L();
sl@0: 	*iPtr++=c;
sl@0: 	if (c==(TUint8)iDelim)
sl@0: 		iLeft=0;
sl@0: 	else
sl@0: 		--iLeft;
sl@0: 	return aTransfer-sizeof(c);
sl@0: 	}
sl@0: 
sl@0: TDelimitedInput16::TDelimitedInput16(TUint16* aPtr,TInt aLength,TChar aDelim)
sl@0: 	: iPtr(aPtr),iLeft(aLength),iDelim(aDelim)
sl@0: 	{}
sl@0: 
sl@0: TInt TDelimitedInput16::PushL(const TAny* aPtr,TInt aMaxLength)
sl@0: //
sl@0: // Push 16-bit text into this input buffer up to the first occurrence of the delimiter.
sl@0: // We cannot use TPtrC16 here as the data may not be half-word aligned
sl@0: //
sl@0: 	{
sl@0: 	TInt len=Min(aMaxLength>>1,iLeft);
sl@0: 	iLeft-=len;
sl@0: 	TInt lbyte=iDelim&0xffu;
sl@0: 	TInt hbyte=iDelim>>8;
sl@0: 	const TUint8* p=static_cast<const TUint8*>(aPtr);
sl@0: 	TInt d=0;
sl@0: 	while (d<len)
sl@0: 		{
sl@0: 		if (p[d<<1]==lbyte && p[(d<<1)+1]==hbyte) // platform dependency
sl@0: 			{
sl@0: 			++d;		// include the delimiter
sl@0: 			iLeft=0;	// found a match
sl@0: 			break;
sl@0: 			}
sl@0: 		++d;
sl@0: 		}
sl@0: 
sl@0: 	iPtr=(TUint16*)Mem::Copy(iPtr,aPtr,d<<1); // platform dependency
sl@0: 	return d<<1;
sl@0: 	}
sl@0: 
sl@0: TStreamTransfer TDelimitedInput16::ReadFromL(MStreamBuf& aSource,TStreamTransfer aTransfer)
sl@0: //
sl@0: // Read a single 16-bit text character from aSource, testing it against the delimiter.
sl@0: //
sl@0: 	{
sl@0: 	if (Done())
sl@0: 		return aTransfer;
sl@0: //
sl@0: 	RReadStream stream(&aSource);
sl@0: 	TUint16 c=stream.ReadUint16L();
sl@0: //
sl@0: 	*iPtr++=c;
sl@0: 	if (c==(TUint16)iDelim)
sl@0: 		iLeft=0;
sl@0: 	else
sl@0: 		--iLeft;
sl@0: 	return aTransfer-sizeof(c);
sl@0: 	}
sl@0: