| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * XSECCanon := Base (virtual) class for canonicalisation objects |
| * |
| * Author(s): Berin Lautenbach |
| * |
| * $ID$ |
| * |
| * $LOG$ |
| * |
| */ |
| |
| #include <xsec/canon/XSECCanon.hpp> |
| #include <xsec/utils/XSECDOMUtils.hpp> |
| |
| #include <memory.h> |
| |
| XERCES_CPP_NAMESPACE_USE |
| |
| // -------------------------------------------------------------------------------- |
| // XSECCanon Virtual Class implementation |
| // -------------------------------------------------------------------------------- |
| |
| |
| // Constructors |
| |
| XSECCanon::XSECCanon() {}; |
| |
| XSECCanon::XSECCanon(DOMDocument *newDoc) : m_buffer() { |
| |
| |
| mp_doc = newDoc; |
| mp_startNode = mp_nextNode = newDoc; // By default, start from startNode |
| m_bufferLength = m_bufferPoint = 0; // Start with an empty buffer |
| m_allNodesDone = false; |
| |
| }; |
| |
| XSECCanon::XSECCanon(DOMDocument *newDoc, DOMNode *newStartNode) { |
| |
| mp_doc = newDoc; |
| mp_startNode = mp_nextNode = newStartNode; |
| m_bufferLength = m_bufferPoint = 0; // Start with an empty buffer |
| m_allNodesDone = false; |
| |
| }; |
| |
| // Destructors |
| |
| XSECCanon::~XSECCanon() {}; |
| |
| // Public Methods |
| |
| xsecsize_t XSECCanon::outputBuffer(unsigned char *outBuffer, xsecsize_t numBytes) { |
| |
| // numBytes of data are required to be placed in outBuffer. |
| |
| // Calculate amount left in buffer |
| |
| xsecsize_t remaining = m_bufferLength - m_bufferPoint; |
| xsecsize_t bytesToGo = numBytes; |
| xsecsize_t i = 0; // current point in outBuffer |
| |
| |
| // While we don't have enough, and have not completed - |
| |
| while (!m_allNodesDone && (remaining < bytesToGo)) { |
| |
| // Copy what we have and get some more in the buffer |
| memcpy(&outBuffer[i], &m_buffer[m_bufferPoint], remaining); |
| i += remaining; |
| m_bufferPoint += remaining; |
| bytesToGo -= remaining; |
| |
| // Get more |
| |
| processNextNode(); |
| |
| remaining = m_bufferLength - m_bufferPoint; // This will be reset by processNextElement |
| // "-bufferPoint" is just in case. |
| |
| } |
| |
| if (m_allNodesDone && (remaining < bytesToGo)) { |
| |
| // Was not enough data to fill everything up |
| memcpy (&outBuffer[i], &m_buffer[m_bufferPoint], remaining); |
| m_bufferPoint += remaining; |
| return i + remaining; |
| } |
| |
| // Copy the tail of the buffer |
| |
| memcpy(&outBuffer[i], &m_buffer[m_bufferPoint], bytesToGo); |
| m_bufferPoint += bytesToGo; |
| return (bytesToGo + i); |
| |
| } |
| |
| // setStartNode sets the starting point for the output if it is a sub-document |
| // that needs canonicalisation and we want to re-start |
| |
| bool XSECCanon::setStartNode(DOMNode *newStartNode) { |
| |
| mp_startNode = newStartNode; |
| m_bufferPoint = 0; |
| m_bufferLength = 0; |
| mp_nextNode = mp_startNode; |
| |
| m_allNodesDone = false; // Restart |
| |
| return true; // Should check to ensure that the StartNode is part of the doc. |
| |
| } |
| |
| |