70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
|
#include "flags.h"
|
||
|
|
#include <sstream>
|
||
|
|
|
||
|
|
namespace Flags {
|
||
|
|
|
||
|
|
std::vector<std::string> split(const std::string &input, const char separator) {
|
||
|
|
std::vector<std::string> result;
|
||
|
|
std::istringstream stream(input);
|
||
|
|
std::string part;
|
||
|
|
while (std::getline(stream, part, separator))
|
||
|
|
result.push_back(part);
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool starts_with(const std::string &input, const std::string &start) {
|
||
|
|
return (input.length() >= start.length() && input.substr(0, 2) == start);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool Parser::parse(int argc, char **argv) {
|
||
|
|
// put each argument into a std::string
|
||
|
|
std::vector<std::string> args;
|
||
|
|
for (int i = 0; i < argc; i++) {
|
||
|
|
std::string arg(argv[i]);
|
||
|
|
if (starts_with(arg, prefix) && arg.length() > prefix.length()) {
|
||
|
|
std::vector<std::string> parts = split(arg, '=');
|
||
|
|
args.insert(args.end(), parts.begin(), parts.end());
|
||
|
|
} else {
|
||
|
|
args.push_back(arg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// search for flags
|
||
|
|
for (size_t i = 1; i < args.size() - 1; i++) {
|
||
|
|
const std::string &arg = args[i];
|
||
|
|
if (starts_with(arg, prefix) && arg.length() > prefix.length()) {
|
||
|
|
flags[arg.substr(prefix.length())]->parse(args[i + 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// check for the last argument
|
||
|
|
if (starts_with(args[args.size() - 1], prefix) &&
|
||
|
|
args[args.size() - 1].length() > prefix.length()) {
|
||
|
|
flags[args[args.size() - 1].substr(prefix.length())]->parse("");
|
||
|
|
}
|
||
|
|
|
||
|
|
return get_found() == flags.size();
|
||
|
|
}
|
||
|
|
|
||
|
|
const unsigned Parser::get_parsed() const {
|
||
|
|
return std::count_if(
|
||
|
|
flags.begin(), flags.end(),
|
||
|
|
[](std::pair<std::string, Flag *> f) { return f.second->get_parsed(); });
|
||
|
|
}
|
||
|
|
|
||
|
|
const unsigned Parser::get_found() const {
|
||
|
|
return std::count_if(
|
||
|
|
flags.begin(), flags.end(),
|
||
|
|
[](std::pair<std::string, Flag *> f) { return f.second->get_found(); });
|
||
|
|
}
|
||
|
|
|
||
|
|
void Parser::help() const {
|
||
|
|
std::cout << help_text << std::endl;
|
||
|
|
|
||
|
|
for (auto f : flags) {
|
||
|
|
std::cout << '\t' << prefix << f.first << ": "
|
||
|
|
<< f.second->get_description() << std::endl;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} // namespace Flags
|