66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
/*
|
|
* Copyright (C) 2013 Emeric Poupon
|
|
*
|
|
* This file is part of LMS.
|
|
*
|
|
* LMS is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* LMS is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with LMS. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <fstream>
|
|
#include <stdexcept>
|
|
|
|
#include <boost/crc.hpp> // for boost::crc_32_type
|
|
|
|
#include "logger/Logger.hpp"
|
|
|
|
#include "Checksum.hpp"
|
|
|
|
typedef boost::crc_32_type crc_type;
|
|
|
|
void computeCrc(const boost::filesystem::path& p, std::vector<unsigned char>& crc)
|
|
{
|
|
crc_type result;
|
|
|
|
std::ifstream ifs( p.string().c_str(), std::ios_base::binary );
|
|
|
|
if (ifs)
|
|
{
|
|
do
|
|
{
|
|
std::array<char,1024> buffer;
|
|
|
|
ifs.read( buffer.data(), buffer.size() );
|
|
result.process_bytes( buffer.data(), ifs.gcount() );
|
|
}
|
|
while ( ifs );
|
|
}
|
|
else
|
|
{
|
|
LMS_LOG(MOD_DBUPDATER, SEV_ERROR) << "Failed to open file '" << p << "'";
|
|
throw std::runtime_error("Failed to open file '" + p.string() + "'" );
|
|
}
|
|
|
|
// Copy back result into the vector
|
|
|
|
// Copy the result into a vector of unsigned char
|
|
const crc_type::value_type checksum = result.checksum();
|
|
for (std::size_t i = 0; (i+1)*8 <= crc_type::bit_count; i++)
|
|
{
|
|
const unsigned char* data = reinterpret_cast<const unsigned char*>( &checksum );
|
|
crc.push_back(data[i]);
|
|
}
|
|
|
|
}
|
|
|