sippeangelo
121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* $Id: BinMemOutputStream.cpp 932887 2010-04-11 13:04:59Z borisk $
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*/
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#include <xercesc/internal/BinMemOutputStream.hpp>
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#include <xercesc/util/XMLString.hpp>
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#include <string.h>
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XERCES_CPP_NAMESPACE_BEGIN
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BinMemOutputStream::BinMemOutputStream( XMLSize_t initCapacity
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, MemoryManager* const manager)
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: fMemoryManager(manager)
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, fDataBuf(0)
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, fIndex(0)
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, fCapacity(initCapacity)
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{
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// Buffer is one larger than capacity, to allow for zero term
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fDataBuf = (XMLByte*) fMemoryManager->allocate
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(
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(fCapacity + 4) * sizeof(XMLByte)
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);
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// Keep it null terminated
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fDataBuf[0] = XMLByte(0);
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}
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BinMemOutputStream::~BinMemOutputStream()
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{
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fMemoryManager->deallocate(fDataBuf);
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}
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void BinMemOutputStream::writeBytes( const XMLByte* const toGo
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, const XMLSize_t maxToWrite)
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{
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if (maxToWrite)
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{
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ensureCapacity(maxToWrite);
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memcpy(&fDataBuf[fIndex], toGo, maxToWrite * sizeof(XMLByte));
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fIndex += maxToWrite;
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}
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}
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const XMLByte* BinMemOutputStream::getRawBuffer() const
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{
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fDataBuf[fIndex] = 0;
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fDataBuf[fIndex + 1] = 0;
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fDataBuf[fIndex + 2] = 0;
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fDataBuf[fIndex + 3] = 0;
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return fDataBuf;
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}
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void BinMemOutputStream::reset()
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{
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fIndex = 0;
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for (int i = 0; i < 4; i++)
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{
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fDataBuf[fIndex + i] = 0;
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}
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}
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XMLFilePos BinMemOutputStream::curPos() const
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{
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return fIndex;
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}
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XMLFilePos BinMemOutputStream::getSize() const
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{
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return fCapacity;
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}
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// ---------------------------------------------------------------------------
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// BinMemOutputStream: Private helper methods
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// ---------------------------------------------------------------------------
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void BinMemOutputStream::ensureCapacity(const XMLSize_t extraNeeded)
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{
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// If we can handle it, do nothing yet
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if (fIndex + extraNeeded < fCapacity)
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return;
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// Oops, not enough room. Calc new capacity and allocate new buffer
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const XMLSize_t newCap = ((fIndex + extraNeeded) * 2);
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XMLByte* newBuf = (XMLByte*) fMemoryManager->allocate
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(
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(newCap+4) * sizeof(XMLByte)
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);
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memset(newBuf, 0, (newCap+4) * sizeof(XMLByte));
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// Copy over the old stuff
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memcpy(newBuf, fDataBuf, fCapacity * sizeof(XMLByte) + 4);
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// Clean up old buffer and store new stuff
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fMemoryManager->deallocate(fDataBuf);
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fDataBuf = newBuf;
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fCapacity = newCap;
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}
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XERCES_CPP_NAMESPACE_END
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