libH/DynamicBuffer.cpp

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/*
  
  Copyright (c) 2007, Tim Burrell
  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. 
  
*/

#include "Debug.hpp"
#include "Exception.hpp"
#include <stdlib.h>
#include <string.h>

using namespace std;
using namespace H;

// Namespace

namespace H {

// Construction

template <class DataType>
DynamicBuffer<DataType>::DynamicBuffer() {
        mLength = 0;
        mBuffer = NULL;
}

template <class DataType>
DynamicBuffer<DataType>::~DynamicBuffer() {
        clear();
}

template <class ConvertTo, class DataType>
DynamicBufferConverter<ConvertTo, DataType>::DynamicBufferConverter() {
}

template <class ConvertTo, class DataType>
DynamicBufferConverter<ConvertTo, DataType>::~DynamicBufferConverter() {
}

// Class Body

template <class DataType>
void DynamicBuffer<DataType>::addToBuffer(const DataType * AddBuf, size_t BufLen) {
        if ((mBuffer = (DataType *) (realloc(mBuffer, (mLength + 1 + BufLen) * sizeof(DataType)))) == NULL)
                throw H::Exception("DynamicBuffer :: Failed to Allocate Memory!!", __FILE__, __FUNCTION__, __LINE__);

        memcpy(mBuffer + mLength, AddBuf, sizeof(DataType) * BufLen);   
        mLength += BufLen;
        mBuffer[mLength] = '\0';
}

template <class DataType>
void DynamicBuffer<DataType>::clear() {
        if (mBuffer)
                free(mBuffer);
        mBuffer = NULL;
        mLength = 0;
}

template <class DataType, class ConvertTo>
void DynamicBufferConverter<DataType, ConvertTo>::convert(std::vector<ConvertTo> & ConvertedVector, DynamicBuffer<DataType> const & Buffer) {
        int NumItems = Buffer.length() / sizeof(ConvertTo);
        ConvertedVector.resize(NumItems);
        const char * tBuf = Buffer.getBuffer();
        for (int lp = 0; lp < NumItems; lp ++)
                memcpy(&ConvertedVector[lp], tBuf + (lp * sizeof(ConvertTo)), sizeof(ConvertTo));
}

template <class DataType>
const DataType * DynamicBuffer<DataType>::getBuffer() const {
        return mBuffer;
}

template <class DataType>
size_t DynamicBuffer<DataType>::length() const {
        return mLength;
}


} // end namespace

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