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/******************************************************************************
*
* Purpose: Implementation of the CPCIDSKBinarySegment class.
*
******************************************************************************
* Copyright (c) 2010
* PCI Geomatics, 50 West Wilmot Street, Richmond Hill, Ont, Canada
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "segment/cpcidskbinarysegment.h"
#include "segment/cpcidsksegment.h"
#include "core/pcidsk_utils.h"
#include "pcidsk_exception.h"
#include "core/pcidsk_utils.h"
#include <vector>
#include <string>
#include <cassert>
#include <cstring>
using namespace PCIDSK;
/**
* Binary Segment constructor
* @param[in,out] file the PCIDSK file
* @param[in] segment the segment index
* @param[in] segment_pointer the segement pointer
* @param[in] bLoad true to load the segment, else false (default true)
*/
CPCIDSKBinarySegment::CPCIDSKBinarySegment(PCIDSKFile *file,
int segment,
const char *segment_pointer,
bool bLoad) :
CPCIDSKSegment(file, segment, segment_pointer),
loaded_(false),mbModified(false)
{
if (true == bLoad)
{
Load();
}
return;
}// Initializer constructor
CPCIDSKBinarySegment::~CPCIDSKBinarySegment()
{
}
/**
* Load the contents of the segment
*/
void CPCIDSKBinarySegment::Load()
{
// Check if we've already loaded the segment into memory
if (loaded_) {
return;
}
seg_data.SetSize((int)data_size - 1024);
ReadFromFile(seg_data.buffer, 0, data_size - 1024);
// Mark it as being loaded properly.
loaded_ = true;
}
/**
* Write the segment on disk
*/
void CPCIDSKBinarySegment::Write(void)
{
//We are not writing if nothing was loaded.
if (!loaded_) {
return;
}
WriteToFile(seg_data.buffer, 0, seg_data.buffer_size);
mbModified = false;
}
/**
* Synchronize the segement, if it was modified then
* write it into disk.
*/
void CPCIDSKBinarySegment::Synchronize()
{
if(mbModified)
{
this->Write();
}
}
void
CPCIDSKBinarySegment::SetBuffer(const char* pabyBuf,
unsigned int nBufSize)
{
// Round the buffer size up to the next multiple of 512.
int nNumBlocks = nBufSize / 512 + ((0 == nBufSize % 512) ? 0 : 1);
unsigned int nAllocBufSize = 512 * nNumBlocks;
seg_data.SetSize((int)nAllocBufSize);
data_size = nAllocBufSize + 1024; // Incl. header
memcpy(seg_data.buffer, pabyBuf, nBufSize);
// Fill unused data at end with zeroes.
if (nBufSize < nAllocBufSize)
{
memset(seg_data.buffer + nBufSize, 0,
nAllocBufSize - nBufSize);
}
mbModified = true;
return;
}// SetBuffer
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