FileSummary.cpp

/*File summary - Prints file summary all printable, non-printable characters from any file.
Can also works as strings extraction from any file just like GNU 'strings'. tool.
Written by - Ha5eeB MiR (haseebmir.hm@gmail.com)
Dated : 13/08/2018
*/

#include <iostream>
#include <fstream>
#include <vector>

std::string ReadFile(std::string file_name);

int main()
{
    std::string file_name;

    std::cout << "Enter file name to print summary!" << std::endl;
    std::cin>> file_name;

    std::string ascii_data = ReadFile(file_name);

    if(!ascii_data.empty()){
    int cntrl_count = 0,graph_count = 0,space_count = 0,null_count = 0,strings_count = 0;
    std::vector<uint8_t> cntrl_vec,print_vec,space_vec,string_s;

/* Minimum length of sequence of graphic chars to trigger output. (same as of (GNU strings tool)  */
    static int string_min = 4;

    for(auto& c : ascii_data) {
        if(::iscntrl(c)) {
            cntrl_count++;
            cntrl_vec.push_back(c);
        }

        if(::isspace(c)) {
            space_count++;
            space_vec.push_back(c);
        }

        if(::isprint(c) || c == '\0') {
            graph_count++;

            if(::isprint(c)){
            string_s.push_back(c);
            strings_count++;
            }

            if(string_min <= strings_count  && c == '\0') {

                    for(auto ss : string_s)
                    print_vec.push_back(ss);
                    print_vec.push_back('\0');

                    string_s.clear();
                    strings_count = 0;
                }
            }
    }


    std::cout << "File summary : " << std::endl;

    std::cout <<"\nNon-printable characters : " << cntrl_count << std::endl;
    for(auto& v : cntrl_vec) std::cout << " '" << v << "' ";

    std::cout <<"\nPrintable characters : " << graph_count << std::endl;
    for(auto& v : print_vec) {
        if(v == '\0') {
            std::cout << "\n";
        }
        std::cout << v;
    }

    std::cout <<"\nSpaces : " << space_count << std::endl;
    for(auto& v : space_vec) std::cout << " _ ";
    }
    else
    {
        return EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}


std::string ReadFile(std::string file_name)
{
    /*Buffers to store output data from file.*/
    std::string str_buf;

    try {
        std::ifstream in_stream(file_name,std::ifstream::binary);
        if (in_stream) {
            /*Get the length of the file.*/
            in_stream.seekg (0, in_stream.end);
            int64_t length = in_stream.tellg();
            in_stream.seekg (0, in_stream.beg);

            char* data_buf = new char [length];

            /*Read data in chunks into buffer.*/
            in_stream.read(data_buf,length);

            if (!in_stream) {
        std::cerr << "Error : " << in_stream.gcount() << " characters could be read!" << std::endl;
            }
            in_stream.close();

            std::string s_buf(data_buf,length);
            str_buf = s_buf;

            delete[] data_buf;
        } else {
            throw std::exception();
        }
    }

    catch(std::exception const& ex) {
        std::cerr << "Error : " << file_name <<  ": No such file or directory" << std::endl;
    }
    return str_buf;
}