/*
 * Copyright 2002-2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * XSEC
 *
 * TXFMSB := Class that takes an input safeBuffer to start a transform pipe
 *
 * $Id$
 *
 */

#include <xsec/transformers/TXFMSB.hpp>

XERCES_CPP_NAMESPACE_USE

// General includes 

#include <memory.h>

TXFMSB::TXFMSB(DOMDocument *doc) : TXFMBase(doc) {

	toOutput = 0;

}


TXFMSB::~TXFMSB() {

}

	// Methods to set the inputs

void TXFMSB::setInput(TXFMBase *newInput) {

	// Not possible as this needs to be the start of a tranform pipe

	return;

}

void TXFMSB::setInput(const safeBuffer sbIn) {

	// Assume this is a string

	sb = sbIn;
	toOutput = sb.sbStrlen();
	sbs = toOutput;

}

void TXFMSB::setInput(const safeBuffer sbIn, unsigned int sbSize) {

	// Assume this is a string

	sb = sbIn;
	if (sbSize > sb.sbRawBufferSize())
		toOutput = sb.sbRawBufferSize();
	else
		toOutput = sbSize;
	sbs = toOutput;

}


	// Methods to get tranform output type and input requirement

TXFMBase::ioType TXFMSB::getInputType(void) {

	return TXFMBase::BYTE_STREAM;

}

TXFMBase::ioType TXFMSB::getOutputType(void) {

	return TXFMBase::BYTE_STREAM;

}


TXFMBase::nodeType TXFMSB::getNodeType(void) {

	return TXFMBase::DOM_NODE_NONE;

}



	// Methods to get output data

unsigned int TXFMSB::readBytes(XMLByte * const toFill, unsigned int maxToFill) {
	
	// Return from the buffer
	
	unsigned int ret;

	if (toOutput == 0)
		return 0;

	// Check if we can just output everything left
	if (toOutput <= maxToFill) {

		memcpy((char *) toFill, &(sb.rawBuffer()[sbs - toOutput]), toOutput);
		ret = (unsigned int) toOutput;
		toOutput = 0;

		return ret;

	}

	// Output just some

	memcpy((char *) toFill, &(sb.rawBuffer()[sbs - toOutput]), maxToFill);
	ret = maxToFill;
	toOutput -= maxToFill;

	return ret;
}

DOMDocument *TXFMSB::getDocument() {

	return NULL;

};

DOMNode * TXFMSB::getFragmentNode() {

	return NULL;

};

const XMLCh * TXFMSB::getFragmentId() {

	return NULL;	// Empty string

}