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#include <qpdf/assert_test.h>
#include <qpdf/QPDFArgParser.hh>
#include <qpdf/QPDFUsage.hh>
#include <cstring>
#include <iostream>
class ArgParser
{
public:
ArgParser(int argc, char* argv[]);
void parseArgs();
void test_exceptions();
private:
void handlePotato();
void handleSalad(std::string const& p);
void handleMoo(std::string const& p);
void handleOink(std::string const& p);
void handleQuack(std::string const& p);
void startQuack();
void getQuack(std::string const& p);
void endQuack();
void finalChecks();
void initOptions();
void output(std::string const&);
QPDFArgParser ap;
int quacks{0};
};
ArgParser::ArgParser(int argc, char* argv[]) :
ap(QPDFArgParser(argc, argv, "TEST_ARG_PARSER"))
{
initOptions();
}
void
ArgParser::initOptions()
{
auto b = [this](void (ArgParser::*f)()) { return QPDFArgParser::bindBare(f, this); };
auto p = [this](void (ArgParser::*f)(std::string const&)) {
return QPDFArgParser::bindParam(f, this);
};
ap.addBare("potato", b(&ArgParser::handlePotato));
ap.addRequiredParameter("salad", p(&ArgParser::handleSalad), "tossed");
ap.addOptionalParameter("moo", p(&ArgParser::handleMoo));
char const* choices[] = {"pig", "boar", "sow", nullptr};
ap.addChoices("oink", p(&ArgParser::handleOink), true, choices);
ap.selectHelpOptionTable();
ap.addBare("version", [this]() { output("3.14159"); });
ap.selectMainOptionTable();
ap.addBare("quack", b(&ArgParser::startQuack));
ap.registerOptionTable("quack", b(&ArgParser::endQuack));
ap.addPositional(p(&ArgParser::getQuack));
ap.addFinalCheck(b(&ArgParser::finalChecks));
ap.selectMainOptionTable();
ap.addBare("baaa", [this]() { this->ap.selectOptionTable("baaa"); });
ap.registerOptionTable("baaa", nullptr);
ap.addBare("ewe", [this]() { output("you"); });
ap.addBare("ram", [this]() { output("ram"); });
ap.selectMainOptionTable();
ap.addBare("sheep", [this]() { this->ap.selectOptionTable("sheep"); });
ap.registerOptionTable("sheep", nullptr);
ap.addHelpFooter("For more help, read the manual.\n");
ap.addHelpTopic(
"quack", "Quack Options", "Just put stuff after quack to get a count at the end.\n");
ap.addHelpTopic(
"baaa",
"Baaa Options",
"Ewe can do sheepish things.\n"
"For example, ewe can add more ram to your computer.\n");
ap.addOptionHelp("--ewe", "baaa", "just for ewe", "You are not a ewe.\n");
ap.addOptionHelp("--ram", "baaa", "curly horns", "");
}
void
ArgParser::output(std::string const& msg)
{
if (!this->ap.isCompleting()) {
std::cout << msg << std::endl;
}
}
void
ArgParser::handlePotato()
{
output("got potato");
}
void
ArgParser::handleSalad(std::string const& p)
{
output(std::string("got salad=") + p);
}
void
ArgParser::handleMoo(std::string const& p)
{
output(std::string("got moo=") + (p.empty() ? "(none)" : p));
}
void
ArgParser::handleOink(std::string const& p)
{
output(std::string("got oink=") + p);
}
void
ArgParser::parseArgs()
{
this->ap.parseArgs();
}
void
ArgParser::startQuack()
{
this->ap.selectOptionTable("quack");
if (this->ap.isCompleting()) {
if (this->ap.isCompleting() && (this->ap.argsLeft() == 0)) {
this->ap.insertCompletion("something");
this->ap.insertCompletion("anything");
}
return;
}
}
void
ArgParser::getQuack(std::string const& p)
{
++this->quacks;
if (this->ap.isCompleting() && (this->ap.argsLeft() == 0)) {
this->ap.insertCompletion(std::string("thing-") + std::to_string(this->quacks));
return;
}
output(std::string("got quack: ") + p);
}
void
ArgParser::endQuack()
{
output("total quacks so far: " + std::to_string(this->quacks));
}
void
ArgParser::finalChecks()
{
output("total quacks: " + std::to_string(this->quacks));
}
void
ArgParser::test_exceptions()
{
auto err = [](char const* msg, std::function<void()> fn) {
try {
fn();
assert(msg == nullptr);
} catch (std::exception& e) {
std::cout << msg << ": " << e.what() << std::endl;
}
};
err("duplicate handler", [this]() {
ap.selectMainOptionTable();
ap.addBare("potato", []() {});
});
err("duplicate handler", [this]() {
ap.selectOptionTable("baaa");
ap.addBare("ram", []() {});
});
err("duplicate table", [this]() { ap.registerOptionTable("baaa", nullptr); });
err("unknown table", [this]() { ap.selectOptionTable("aardvark"); });
err("add existing help topic", [this]() { ap.addHelpTopic("baaa", "potato", "salad"); });
err("add reserved help topic", [this]() { ap.addHelpTopic("all", "potato", "salad"); });
err("add to unknown topic", [this]() { ap.addOptionHelp("--new", "oops", "potato", "salad"); });
err("bad option for help", [this]() { ap.addOptionHelp("nodash", "baaa", "potato", "salad"); });
err("bad topic for help", [this]() { ap.addHelpTopic("--dashes", "potato", "salad"); });
err("duplicate option help",
[this]() { ap.addOptionHelp("--ewe", "baaa", "potato", "salad"); });
err("invalid choice handler to unknown",
[this]() { ap.addInvalidChoiceHandler("elephant", [](std::string const&) {}); });
}
int
main(int argc, char* argv[])
{
ArgParser ap(argc, argv);
if ((argc == 2) && (strcmp(argv[1], "exceptions") == 0)) {
ap.test_exceptions();
return 0;
}
try {
ap.parseArgs();
} catch (QPDFUsage& e) {
std::cerr << "usage: " << e.what() << std::endl;
exit(2);
} catch (std::exception& e) {
std::cerr << "exception: " << e.what() << std::endl;
exit(3);
}
return 0;
}
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