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main.cpp
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main.cpp
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/***********************************************************************
FILE MAIN.CPP CONTAINS EXPERIMENTAL CODE RELATED TO BOOST, FMTLIB & DATE
FILE UTMOST REVIEW DONE ON (06.01.2021) BY ARTUR K.
***********************************************************************/
#include <boost/filesystem.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/program_options.hpp>
#include <fmt/format.h>
#include <date/date.h>
#include <iostream>
#include <vector>
#include <string>
#include <thread>
#include <chrono>
// There is an issue with fmt/format (fmtlib)
// https://github.com/fmtlib/fmt/issues/795
namespace fs = boost::filesystem;
namespace po = boost::program_options;
void threadMethod()
{
for ( int i = 0; i < 10; i++ )
{
fmt::print( "Threaded method...\n" );
}
}
int main( int argc, char* argv[] )
{
fmt::print( "Welcome to Raspbery PI 4!\n" );
fmt::print(
"Current time and date: {}\n",
date::format( "%F %T %Z", date::floor< std::chrono::milliseconds >( std::chrono::system_clock::now() ) ) );
auto revDate = date::January/6/2021;
fmt::print( "Revision completed on: {}\n", date::format( "%F", revDate ) );
fmt::print( "Day of the week: {}\n", date::format( "%A", revDate ) );
fmt::print( "Day of the week: {}\n", date::format( "%A", date::weekday{ revDate } ) );
// For all formats see: https://howardhinnant.github.io/date/date.html#to_stream_formatting
fmt::print(
"Thread available: {}\n",
std::thread::hardware_concurrency() );
po::options_description optDesc;
po::variables_map varMap;
int value { 0 };
std::vector<std::string> fileNames;
optDesc.add_options()
( "help,h", "Some help message here ...")
( "value,v", po::value< int >( &value )->default_value( 75 ), "Value for ..." )
( "files,f", po::value< std::vector< std::string > >( &fileNames )->multitoken(), "Files ..." );
// To print help all you need is to pass --help
// To set a value you either use --value or -v
po::store( po::parse_command_line( argc, argv, optDesc ), varMap );
po::notify( varMap ) ;
if ( varMap.count( "help" ) )
{
std::cout << optDesc << std::endl;
}
if ( varMap.count( "value" ) )
{
std::cout << varMap[ "value" ].as< int >() << std::endl;
}
for (auto i = 0u; i < fileNames.size(); i++)
{
fmt::print( "File Name: {}\n", fileNames[ i ] );
}
std::thread th( threadMethod );
std::string fileName { "test.bin" };
if ( fs::exists( fileName ) )
{
fmt::print(
"File {} already exists, but we will overwrite it.\n",
fileName );
}
std::string valueStr = "17.5";
fmt::print( "Lexical cast example 1: {}\n", boost::lexical_cast< std::string >( 10.5f ) );
fmt::print( "Lexical cast example 2: {}\n", boost::lexical_cast< float >( valueStr ) );
FILE* pOutFile = nullptr;
pOutFile = fopen( &fileName[0], "wb" );
if ( pOutFile )
{
fwrite( &value, sizeof( int ), 1, pOutFile );
fclose( pOutFile );
fmt::print( "INFO: FILE '{}' CREATED AND WRITTEN\n", fileName );
}
else
{
fmt::print( "ERROR: COULDN'T CREATE '{}' FILE!\n", fileName );
}
th.join();
return 0;
}