Getting desired binary data ranges from std::istreambuf_iterator and std::ifstream

Question

#include 
#include 
#include 
#include 

int main()
{
    std::ifstream file(\"data.bin\", std::ios::bin         


        

Answer 1

Here's my recommended Spirit approach:

#include 
#include 

namespace qi = boost::spirit::qi;

int main()
{
    std::ifstream file("data.bin", std::ios::binary);
    if(!file)
        std::cout << "File does not exist or could not open file";
    boost::spirit::istream_iterator f(file), l;

    std::vector buffer;
    bool ok = qi::parse(f, l, *qi::word, buffer);
}

Of course, there is qi::dword, qi::qword, big-endian/little-endian variatations etc.:

• http://www.boost.org/doc/libs/1_52_0/libs/spirit/doc/html/spirit/qi/reference/binary/binary_native.html
• http://www.boost.org/doc/libs/1_52_0/libs/spirit/doc/html/spirit/qi/reference/binary/binary_little.html
• http://www.boost.org/doc/libs/1_52_0/libs/spirit/doc/html/spirit/qi/reference/binary/binary_big.html

---

You can look at wchar_t

#include 
#include 
#include 
#include 
int main()
{
    std::wifstream file("data.bin", std::ios::binary );
    if( file.fail() )
    {
        std::cout << "File does not exist or could not open file";
        return 0;
    }
    std::vector buffer;
    std::copy( 
            std::istreambuf_iterator( file ),
            std::istreambuf_iterator(),
            std::back_inserter( buffer )
            );
}

I'm not too sure whether the actual size of wchar_t is implementation defined.