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How to pass image file as pointer of std::vector ?

Zesan RikyZesan Riky Member Posts: 2

I have done it using reference, my code below :

include

include

include

include

include

std::vector get_bytes( const std::string& in_file_name )
{
std::ifstream file( in_file_name, std::ios::binary ) ;
using iterator = std::istream_iterator ;
return { iterator(file), iterator{} } ;
}

void put_bytes( const std::vector& bytes, const std::string& out_file_name )
{
std::ofstream file( out_file_name, std::ios::binary ) ;
for( unsigned char c : bytes ) file.put(c) ;
}

std::vector& convert( std::vector& bytes )
{
// static_assert( std::numeric_limits::max() > 254, "out of range" ) ;
for( unsigned char& c : bytes ) c = 255 - c ;
return bytes ;
}

int main( int argc, char* argv[] )
{
if( argc != 3 )
{
std::cerr << "usage: " << argv[0] << " \n" ;
return 1 ;
}

const std::string in_file_name = argv[1] ;
const std::string out_file_name = argv[2] ;

auto vec = get_bytes(in_file_name) ;
put_bytes( convert(vec), out_file_name ) ;
std::cout << "input file '" << in_file_name << " was converted. output file '"
          << out_file_name << "'\n" ;

}

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