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/* <auto_header>
* <FILENAME>
*
* INTEL CONFIDENTIAL
* Copyright © 2011 Intel
* Corporation All Rights Reserved.
*
* The source code contained or described herein and all documents related to
* the source code ("Material") are owned by Intel Corporation or its suppliers
* or licensors. Title to the Material remains with Intel Corporation or its
* suppliers and licensors. The Material contains trade secrets and proprietary
* and confidential information of Intel or its suppliers and licensors. The
* Material is protected by worldwide copyright and trade secret laws and
* treaty provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed, or
* disclosed in any way without Intel’s prior express written permission.
*
* No license under any patent, copyright, trade secret or other intellectual
* property right is granted to or conferred upon you by disclosure or delivery
* of the Materials, either expressly, by implication, inducement, estoppel or
* otherwise. Any license under such intellectual property rights must be
* express and approved by Intel in writing.
*
* AUTHOR: Patrick Benavoli (patrickx.benavoli@intel.com)
* CREATED: 2011-06-01
* UPDATED: 2011-07-27
*
*
* </auto_header>
*/
#include "BinaryStream.h"
#include <string.h>
#include <assert.h>
using namespace std;
CBinaryStream::CBinaryStream(const string& strFileName, bool bOut, uint32_t uiDataSize, uint8_t uiStructureChecksum) :
_strFileName(strFileName),
_bOut(bOut),
_uiDataSize(uiDataSize),
_uiStructureChecksum(uiStructureChecksum),
_puiData(new uint8_t[uiDataSize]),
_uiPos(0),
_bOpen(false)
{
}
CBinaryStream::~CBinaryStream()
{
delete [] _puiData;
if (_bOpen) {
close();
}
}
bool CBinaryStream::open(string& strError)
{
assert(!_bOpen);
_fileStream.open(_strFileName.c_str(), (_bOut ? ios::out : ios::in|ios::ate)|ios::binary);
if (!_fileStream.is_open() || !_fileStream.good()) {
strError = string("Failed to ") + (_bOut ? "write" : "read") + "-open";
return false;
}
if (!_bOut) {
// Get file size
ifstream::pos_type uiFileSize = _fileStream.tellg();
// Validate file size
if (_uiDataSize + sizeof(_uiStructureChecksum) != (uint32_t)uiFileSize) {
// Size different from expected
strError = "Unexpected file size";
return false;
}
// Back to beginning of file
_fileStream.seekg(0, ios::beg);
// Get data
_fileStream.read((char*)_puiData, _uiDataSize);
// File checksum
uint8_t uiFileChecksum;
_fileStream.read((char*)&uiFileChecksum, sizeof(uiFileChecksum));
// Data checksum
uint8_t uiDataChecksum = computeChecksum();
// Validate checksum
if (uiDataChecksum != uiFileChecksum) {
strError = "Integrity checks failed";
return false;
}
}
// Keep track
_bOpen = true;
return true;
}
void CBinaryStream::close()
{
assert(_bOpen);
if (_bOut) {
// Get data
_fileStream.write((const char*)_puiData, _uiDataSize);
// Compute checksum
uint8_t uiDataChecksum = computeChecksum();
// Write checksum
_fileStream.write((const char*)&uiDataChecksum, sizeof(uiDataChecksum));
}
// Keep track
_bOpen = false;
// Close file
_fileStream.close();
}
void CBinaryStream::reset()
{
_uiPos = 0;
}
void CBinaryStream::write(const uint8_t* puiData, uint32_t uiSize)
{
assert(_uiPos + uiSize <= _uiDataSize);
memcpy(&_puiData[_uiPos], puiData, uiSize);
_uiPos += uiSize;
}
void CBinaryStream::read(uint8_t* puiData, uint32_t uiSize)
{
assert(_uiPos + uiSize <= _uiDataSize);
memcpy(puiData, &_puiData[_uiPos], uiSize);
_uiPos += uiSize;
}
uint8_t CBinaryStream::computeChecksum() const
{
uint32_t uiIndex;
uint8_t uiDataChecksum = _uiStructureChecksum;
for (uiIndex = 0; uiIndex < _uiDataSize; uiIndex++) {
uiDataChecksum += _puiData[uiIndex];
}
return uiDataChecksum;
}
bool CBinaryStream::isOut() const
{
return _bOut;
}
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