U32 crc = 0;
const U32 DEFAULT_BUFFER_SIZE = 1024*32;
boost::crc_32_type CRC32;
char* buf = new char[DEFAULT_BUFFER_SIZE+1];
QFile file( "any.bin" );
Q_ASSERT( file.open(QIODevice::ReadOnly) );
while ( !file.atEnd() ) {
rd = file.read(buf, DEFAULT_BUFFER_SIZE );
CRC32.process_bytes( buf, rd );
}
delete buf;
crc = CRC32.checksum();// Boost CRC example program file ------------------------------------------//
// Copyright 2003 Daryle Walker. Use, modification, and distribution are
// subject to the Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
// See <http://www.boost.org/libs/crc/> for the library's home page.
// Revision History
// 17 Jun 2003 Initial version (Daryle Walker)
#include <boost/crc.hpp> // for boost::crc_32_type
#include <cstdlib> // for EXIT_SUCCESS, EXIT_FAILURE
#include <exception> // for std::exception
#include <fstream> // for std::ifstream
#include <ios> // for std::ios_base, etc.
#include <iostream> // for std::cerr, std::cout
#include <ostream> // for std::endl
// Redefine this to change to processing buffer size
#ifndef PRIVATE_BUFFER_SIZE
#define PRIVATE_BUFFER_SIZE 1024
#endif
// Global objects
std::streamsize const buffer_size = PRIVATE_BUFFER_SIZE;
// Main program
int
main
(
int argc,
char const * argv[]
)
try
{
boost::crc_32_type result;
for ( int i = 1; i < argc; ++i )
{
std::ifstream ifs( argv[i], std::ios_base::binary );
if ( ifs )
{
do
{
char buffer[ buffer_size ];
ifs.read( buffer, buffer_size );
result.process_bytes( buffer, ifs.gcount() );
} while ( ifs );
}
else
{
std::cerr << "Failed to open file '" << argv[i] << "'."
<< std::endl;
}
}
std::cout << std::hex << std::uppercase << result.checksum() << std::endl;
return EXIT_SUCCESS;
}
catch ( std::exception &e )
{
std::cerr << "Found an exception with '" << e.what() << "'." << std::endl;
return EXIT_FAILURE;
}
catch ( ... )
{
std::cerr << "Found an unknown exception." << std::endl;
return EXIT_FAILURE;
}
char* buf = new char[DEFAULT_BUFFER_SIZE];
