Ticket #5908: example.cpp

#include <boost/iostreams/filter/gzip.hpp>
#include <boost/iostreams/filtering_stream.hpp>

#include <cstdlib>
#include <fstream>
#include <iostream>
#include <string>

using namespace std;
using namespace boost::iostreams;

int main(int argc, char** argv) {
    if (argc != 2) {
        cerr << "specify a file to decompress.\n";
        exit(1);
    }

    ifstream f(argv[1]);
    if (!f) {
        cerr << "failed to open " << argv[1] << "\n";
        exit(1);
    }

    filtering_stream<input> s;
    gzip_decompressor gz;
    s.push(gz);
    s.push(f);
    string line;
    unsigned count = 0;
    while (getline(s, line) && ++count)
        cout << line << "\n";
    cout << "read " << count << " lines\n";

    return 0;
}