void EchoServer::compute(const std::string &word, const TcpConnectionPtr &conn, const TextQuery &tq)
{
if(word == "q")
exit(0);
typedef set<TextQuery::line_no> line_nums;
line_nums locs = tq.run_query(word);
line_nums::size_type size = locs.size();
char ssize[128] = "";
sprintf(ssize, "%d", size);
string s;
s = s + "\n" + word + " occurs " + ssize + " "
+ make_plural(size, "time", "s") + "\n";
line_nums::const_iterator it = locs.begin();
for ( ; it != locs.end(); ++it)
{
char sit[128] = "";
sprintf(sit, "%d", (*it) + 1);
s = s + "\t(line " + sit + ") "
+ tq.text_line(*it) + "\r\n";
}
s = s + "\nenter word to look for, or q to quit: ";
conn->send(s);
}
int main(int argc, char **argv)
{
if (argc != 2) {cerr << "No input file" << endl; return -2;}
// get a file to read from which user will query words
ifstream infile;
if (!open_file(infile, argv[1])) {
cerr << "No input file!" << endl;
return -1;
}
TextQuery tq;
tq.read_file(infile); // builds query map
// iterate with the user: prompt for a word to find and print results
string sought;
do {
cout << "enter a word against which to search the text.\n"
<< "to quit, enter a single character ==> ";
cin >> sought;
// stop if hit eof on input or single character entered
if (!cin || sought.size() < 2) break;
// find all the occurrences of the users requested string
vector<TextQuery::location> locs = tq.run_query(sought);
// report no matches
if (locs.empty()) {
cout << "\nSorry. There are no entries for "
<< sought << ".\nTry again." << endl;
continue;
}
// if the word was found, then print count and all occurrences
vector<TextQuery::location>::size_type size = locs.size();
cout << "\n" << sought << " occurs " << size
<< (size == 1 ? " time:" : " times:")
<< "\n" << endl;
// print each line in which the word appeared
vector<TextQuery::location>::iterator it = locs.begin();
while (it != locs.end()) {
cout << "\t(line: "
// don't confound user with text lines starting at 0
<< it->first + 1 << ", pos: " << it->second + 1 << ") "
<< tq.text_line(it->first) << endl;
++it;
}
} while (!sought.empty());
cout << "Ok, bye!" << endl;
// debugging aid -- look at the map that was built
tq.display_map();
return 0;
}
void print_results(const set<TextQuery::line_no>& locs, const string& sought, const TextQuery &file) {
// Print how many times a word shows, and all lines it in.
typedef set<TextQuery::line_no> line_nums;
line_nums::size_type size = locs.size();
cout << "\n" << sought << " occurs " << size << " " << make_plural(size, "time", "s") << endl;
line_nums::const_iterator it = locs.begin();
for (; it != locs.end(); ++it) {
cout << "\t(line " << (*it) + 1 << ") " << file.text_line(*it) << endl;
}
}
void TextQuery::print_result(const std::set<TextQuery::line_no>& locs, const std::string& sought, const TextQuery &file)
{
typedef std::set<TextQuery::line_no> line_nums;
line_nums::size_type size = locs.size();
std::cout << "\n" << sought << " occurs" << size << " " << make_plural(size, "time", "s") << std::endl;
line_nums::const_iterator it = locs.begin();
for (; it != locs.end(); ++it) {
std::cout << "\t(line " << (*it) + 1 << ")" << file.text_line(*it) << std::endl;
}
}
int main(int argc, char *argv[])
{
std::string s1("the"), s2("Her"), s3("in");
const std::string file("text.txt");;
TextQuery tq;
std::ifstream fin(file.c_str());
tq.read_file(fin);
Query q = (Query(s1) & Query(s2)) | Query(s3);
std::set<TextQuery::line_no> set = q.eval(tq);
typedef std::set<TextQuery::line_no>::iterator iter_stq;
for( iter_stq iter= set.begin() ; iter != set.end() ; iter++ )
{
std::cout << tq.text_line(*iter) << std::endl;
}
return 0;
}
int main(int argc, char *argv[])
{
TextQuery tq;
ifstream is("luo.txt");
tq.read_file(is);
string str("luo");
set<TextQuery::line_no> s_lno = tq.run_query(str);
cout << str << " occurs " << s_lno.size() << " times" << endl;
for(set<TextQuery::line_no>::iterator iter = s_lno.begin();
iter != s_lno.end(); ++iter) {
cout << "(line " << *iter << ") ";
cout << tq.text_line(*iter) <<endl;
}
return 0;
}