dolphin/Externals/cpp-optparse/OptionParser.cpp

594 lines
17 KiB
C++

/**
* Copyright (C) 2010 Johannes Weißl <jargon@molb.org>
* License: MIT License
* URL: https://github.com/weisslj/cpp-optparse
*/
#include "OptionParser.h"
#include <cstdlib>
#include <algorithm>
#include <complex>
#include <ciso646>
#if defined(ENABLE_NLS) && ENABLE_NLS
# include <libintl.h>
# define _(s) gettext(s)
#else
# define _(s) ((const char *) (s))
#endif
using namespace std;
namespace optparse {
////////// auxiliary (string) functions { //////////
class str_wrap {
public:
str_wrap(const string& l, const string& r) : lwrap(l), rwrap(r) {}
str_wrap(const string& w) : lwrap(w), rwrap(w) {}
string operator() (const string& s) { return lwrap + s + rwrap; }
const string lwrap, rwrap;
};
template<typename InputIterator, typename UnaryOperator>
static string str_join_trans(const string& sep, InputIterator begin, InputIterator end, UnaryOperator op) {
string buf;
for (InputIterator it = begin; it != end; ++it) {
if (it != begin)
buf += sep;
buf += op(*it);
}
return buf;
}
template<class InputIterator>
static string str_join(const string& sep, InputIterator begin, InputIterator end) {
return str_join_trans(sep, begin, end, str_wrap(""));
}
static string& str_replace(string& s, const string& patt, const string& repl) {
size_t pos = 0, n = patt.length();
while (true) {
pos = s.find(patt, pos);
if (pos == string::npos)
break;
s.replace(pos, n, repl);
pos += repl.size();
}
return s;
}
static string str_replace(const string& s, const string& patt, const string& repl) {
string tmp = s;
str_replace(tmp, patt, repl);
return tmp;
}
static string str_format(const string& str, size_t pre, size_t len, bool running_text = true, bool indent_first = true) {
string s = str;
stringstream ss;
string p;
len -= 2; // Python seems to not use full length
if (running_text)
replace(s.begin(), s.end(), '\n', ' ');
if (indent_first)
p = string(pre, ' ');
size_t pos = 0, linestart = 0;
size_t line = 0;
while (true) {
bool wrap = false;
size_t new_pos = s.find_first_of(" \n\t", pos);
if (new_pos == string::npos)
break;
if (s[new_pos] == '\n') {
pos = new_pos + 1;
wrap = true;
}
if (line == 1)
p = string(pre, ' ');
if (wrap || new_pos + pre > linestart + len) {
ss << p << s.substr(linestart, pos - linestart - 1) << endl;
linestart = pos;
line++;
}
pos = new_pos + 1;
}
ss << p << s.substr(linestart) << endl;
return ss.str();
}
static string str_inc(const string& s) {
stringstream ss;
string v = (s != "") ? s : "0";
long i;
istringstream(v) >> i;
ss << i+1;
return ss.str();
}
static unsigned int cols() {
unsigned int n = 80;
#ifndef _WIN32
const char *s = getenv("COLUMNS");
if (s)
istringstream(s) >> n;
#endif
return n;
}
static string basename(const string& s) {
string b = s;
size_t i = b.find_last_not_of('/');
if (i == string::npos) {
if (b[0] == '/')
b.erase(1);
return b;
}
b.erase(i+1, b.length()-i-1);
i = b.find_last_of("/");
if (i != string::npos)
b.erase(0, i+1);
return b;
}
////////// } auxiliary (string) functions //////////
////////// class OptionContainer { //////////
Option& OptionContainer::add_option(const string& opt) {
const string tmp[1] = { opt };
return add_option(vector<string>(&tmp[0], &tmp[1]));
}
Option& OptionContainer::add_option(const string& opt1, const string& opt2) {
const string tmp[2] = { opt1, opt2 };
return add_option(vector<string>(&tmp[0], &tmp[2]));
}
Option& OptionContainer::add_option(const string& opt1, const string& opt2, const string& opt3) {
const string tmp[3] = { opt1, opt2, opt3 };
return add_option(vector<string>(&tmp[0], &tmp[3]));
}
Option& OptionContainer::add_option(const vector<string>& v) {
_opts.resize(_opts.size()+1, Option(get_parser()));
Option& option = _opts.back();
string dest_fallback;
for (vector<string>::const_iterator it = v.begin(); it != v.end(); ++it) {
if (it->substr(0,2) == "--") {
const string s = it->substr(2);
if (option.dest() == "")
option.dest(str_replace(s, "-", "_"));
option._long_opts.insert(s);
_optmap_l[s] = &option;
} else {
const string s = it->substr(1,1);
if (dest_fallback == "")
dest_fallback = s;
option._short_opts.insert(s);
_optmap_s[s] = &option;
}
}
if (option.dest() == "")
option.dest(dest_fallback);
return option;
}
string OptionContainer::format_option_help(unsigned int indent /* = 2 */) const {
stringstream ss;
if (_opts.empty())
return ss.str();
for (list<Option>::const_iterator it = _opts.begin(); it != _opts.end(); ++it) {
if (it->help() != SUPPRESS_HELP)
ss << it->format_help(indent);
}
return ss.str();
}
////////// } class OptionContainer //////////
////////// class OptionParser { //////////
OptionParser::OptionParser() :
OptionContainer(),
_usage(_("%prog [options]")),
_add_help_option(true),
_add_version_option(true),
_interspersed_args(true) {}
OptionParser& OptionParser::add_option_group(const OptionGroup& group) {
for (list<Option>::const_iterator oit = group._opts.begin(); oit != group._opts.end(); ++oit) {
const Option& option = *oit;
for (set<string>::const_iterator it = option._short_opts.begin(); it != option._short_opts.end(); ++it)
_optmap_s[*it] = &option;
for (set<string>::const_iterator it = option._long_opts.begin(); it != option._long_opts.end(); ++it)
_optmap_l[*it] = &option;
}
_groups.push_back(&group);
return *this;
}
const Option& OptionParser::lookup_short_opt(const string& opt) const {
optMap::const_iterator it = _optmap_s.find(opt);
if (it == _optmap_s.end())
error(_("no such option") + string(": -") + opt);
return *it->second;
}
void OptionParser::handle_short_opt(const string& opt, const string& arg) {
_remaining.pop_front();
string value;
const Option& option = lookup_short_opt(opt);
if (option._nargs == 1) {
value = arg.substr(2);
if (value == "") {
if (_remaining.empty())
error("-" + opt + " " + _("option requires an argument"));
value = _remaining.front();
_remaining.pop_front();
}
} else {
if (arg.length() > 2)
_remaining.push_front(string("-") + arg.substr(2));
}
process_opt(option, string("-") + opt, value);
}
const Option& OptionParser::lookup_long_opt(const string& opt) const {
list<string> matching;
for (optMap::const_iterator it = _optmap_l.begin(); it != _optmap_l.end(); ++it) {
if (it->first.compare(0, opt.length(), opt) == 0) {
matching.push_back(it->first);
if (it->first.length() == opt.length())
break;
}
}
if (matching.size() > 1) {
string x = str_join_trans(", ", matching.begin(), matching.end(), str_wrap("--", ""));
error(_("ambiguous option") + string(": --") + opt + " (" + x + "?)");
}
if (matching.size() == 0)
error(_("no such option") + string(": --") + opt);
return *_optmap_l.find(matching.front())->second;
}
void OptionParser::handle_long_opt(const string& optstr) {
_remaining.pop_front();
string opt, value;
size_t delim = optstr.find("=");
if (delim != string::npos) {
opt = optstr.substr(0, delim);
value = optstr.substr(delim+1);
} else
opt = optstr;
const Option& option = lookup_long_opt(opt);
if (option._nargs == 1 and delim == string::npos) {
if (not _remaining.empty()) {
value = _remaining.front();
_remaining.pop_front();
}
}
if (option._nargs == 1 and value == "")
error("--" + opt + " " + _("option requires an argument"));
process_opt(option, string("--") + opt, value);
}
Values& OptionParser::parse_args(const int argc, char const* const* const argv) {
if (prog() == "")
prog(basename(argv[0]));
return parse_args(&argv[1], &argv[argc]);
}
Values& OptionParser::parse_args(const vector<string>& v) {
_remaining.assign(v.begin(), v.end());
if (add_help_option()) {
add_option("-h", "--help") .action("help") .help(_("show this help message and exit"));
_opts.splice(_opts.begin(), _opts, --(_opts.end()));
}
if (add_version_option() and version() != "") {
add_option("--version") .action("version") .help(_("show program's version number and exit"));
_opts.splice(_opts.begin(), _opts, --(_opts.end()));
}
while (not _remaining.empty()) {
const string arg = _remaining.front();
if (arg == "--") {
_remaining.pop_front();
break;
}
if (arg.substr(0,2) == "--") {
handle_long_opt(arg.substr(2));
} else if (arg.substr(0,1) == "-" and arg.length() > 1) {
handle_short_opt(arg.substr(1,1), arg);
} else {
_remaining.pop_front();
_leftover.push_back(arg);
if (not interspersed_args())
break;
}
}
while (not _remaining.empty()) {
const string arg = _remaining.front();
_remaining.pop_front();
_leftover.push_back(arg);
}
for (list<Option>::const_iterator it = _opts.begin(); it != _opts.end(); ++it) {
if (it->get_default() != "" and not _values.is_set(it->dest()))
_values[it->dest()] = it->get_default();
}
for (list<OptionGroup const*>::iterator group_it = _groups.begin(); group_it != _groups.end(); ++group_it) {
for (list<Option>::const_iterator it = (*group_it)->_opts.begin(); it != (*group_it)->_opts.end(); ++it) {
if (it->get_default() != "" and not _values.is_set(it->dest()))
_values[it->dest()] = it->get_default();
}
}
return _values;
}
void OptionParser::process_opt(const Option& o, const string& opt, const string& value) {
if (o.action() == "store") {
string err = o.check_type(opt, value);
if (err != "")
error(err);
_values[o.dest()] = value;
_values.is_set_by_user(o.dest(), true);
}
else if (o.action() == "store_const") {
_values[o.dest()] = o.get_const();
_values.is_set_by_user(o.dest(), true);
}
else if (o.action() == "store_true") {
_values[o.dest()] = "1";
_values.is_set_by_user(o.dest(), true);
}
else if (o.action() == "store_false") {
_values[o.dest()] = "0";
_values.is_set_by_user(o.dest(), true);
}
else if (o.action() == "append") {
string err = o.check_type(opt, value);
if (err != "")
error(err);
_values[o.dest()] = value;
_values.all(o.dest()).push_back(value);
_values.is_set_by_user(o.dest(), true);
}
else if (o.action() == "append_const") {
_values[o.dest()] = o.get_const();
_values.all(o.dest()).push_back(o.get_const());
_values.is_set_by_user(o.dest(), true);
}
else if (o.action() == "count") {
_values[o.dest()] = str_inc(_values[o.dest()]);
_values.is_set_by_user(o.dest(), true);
}
else if (o.action() == "help") {
print_help();
std::exit(0);
}
else if (o.action() == "version") {
print_version();
std::exit(0);
}
else if (o.action() == "callback" && o.callback()) {
string err = o.check_type(opt, value);
if (err != "")
error(err);
(*o.callback())(o, opt, value, *this);
}
}
string OptionParser::format_help() const {
stringstream ss;
if (usage() != SUPPRESS_USAGE)
ss << get_usage() << endl;
if (description() != "")
ss << str_format(description(), 0, cols()) << endl;
ss << _("Options") << ":" << endl;
ss << format_option_help();
for (list<OptionGroup const*>::const_iterator it = _groups.begin(); it != _groups.end(); ++it) {
const OptionGroup& group = **it;
ss << endl << " " << group.title() << ":" << endl;
if (group.description() != "") {
unsigned int malus = 4; // Python seems to not use full length
ss << str_format(group.description(), 4, cols() - malus) << endl;
}
ss << group.format_option_help(4);
}
if (epilog() != "")
ss << endl << str_format(epilog(), 0, cols());
return ss.str();
}
void OptionParser::print_help() const {
cout << format_help();
}
void OptionParser::set_usage(const string& u) {
string lower = u;
transform(lower.begin(), lower.end(), lower.begin(), ::tolower);
if (lower.compare(0, 7, "usage: ") == 0)
_usage = u.substr(7);
else
_usage = u;
}
string OptionParser::format_usage(const string& u) const {
stringstream ss;
ss << _("Usage") << ": " << u << endl;
return ss.str();
}
string OptionParser::get_usage() const {
if (usage() == SUPPRESS_USAGE)
return string("");
return format_usage(str_replace(usage(), "%prog", prog()));
}
void OptionParser::print_usage(ostream& out) const {
string u = get_usage();
if (u != "")
out << u << endl;
}
void OptionParser::print_usage() const {
print_usage(cout);
}
string OptionParser::get_version() const {
return str_replace(_version, "%prog", prog());
}
void OptionParser::print_version(ostream& out) const {
out << get_version() << endl;
}
void OptionParser::print_version() const {
print_version(cout);
}
void OptionParser::exit() const {
std::exit(2);
}
void OptionParser::error(const string& msg) const {
print_usage(cerr);
cerr << prog() << ": " << _("error") << ": " << msg << endl;
exit();
}
////////// } class OptionParser //////////
////////// class Values { //////////
const string& Values::operator[] (const string& d) const {
strMap::const_iterator it = _map.find(d);
static const string empty = "";
return (it != _map.end()) ? it->second : empty;
}
void Values::is_set_by_user(const string& d, bool yes) {
if (yes)
_userSet.insert(d);
else
_userSet.erase(d);
}
////////// } class Values //////////
////////// class Option { //////////
string Option::check_type(const string& opt, const string& val) const {
istringstream ss(val);
stringstream err;
if (type() == "int" || type() == "long") {
long t;
if (not (ss >> t))
err << _("option") << " " << opt << ": " << _("invalid integer value") << ": '" << val << "'";
}
else if (type() == "float" || type() == "double") {
double t;
if (not (ss >> t))
err << _("option") << " " << opt << ": " << _("invalid floating-point value") << ": '" << val << "'";
}
else if (type() == "choice") {
if (find(choices().begin(), choices().end(), val) == choices().end()) {
list<string> tmp = choices();
transform(tmp.begin(), tmp.end(), tmp.begin(), str_wrap("'"));
err << _("option") << " " << opt << ": " << _("invalid choice") << ": '" << val << "'"
<< " (" << _("choose from") << " " << str_join(", ", tmp.begin(), tmp.end()) << ")";
}
}
else if (type() == "complex") {
complex<double> t;
if (not (ss >> t))
err << _("option") << " " << opt << ": " << _("invalid complex value") << ": '" << val << "'";
}
return err.str();
}
string Option::format_option_help(unsigned int indent /* = 2 */) const {
string mvar_short, mvar_long;
if (nargs() == 1) {
string mvar = metavar();
if (mvar == "") {
mvar = dest();
transform(mvar.begin(), mvar.end(), mvar.begin(), ::toupper);
}
mvar_short = " " + mvar;
mvar_long = "=" + mvar;
}
stringstream ss;
ss << string(indent, ' ');
if (not _short_opts.empty()) {
ss << str_join_trans(", ", _short_opts.begin(), _short_opts.end(), str_wrap("-", mvar_short));
if (not _long_opts.empty())
ss << ", ";
}
if (not _long_opts.empty())
ss << str_join_trans(", ", _long_opts.begin(), _long_opts.end(), str_wrap("--", mvar_long));
return ss.str();
}
string Option::format_help(unsigned int indent /* = 2 */) const {
stringstream ss;
string h = format_option_help(indent);
unsigned int width = cols();
unsigned int opt_width = min(width*3/10, 36u);
bool indent_first = false;
ss << h;
// if the option list is too long, start a new paragraph
if (h.length() >= (opt_width-1)) {
ss << endl;
indent_first = true;
} else {
ss << string(opt_width - h.length(), ' ');
if (help() == "")
ss << endl;
}
if (help() != "") {
string help_str = (get_default() != "") ? str_replace(help(), "%default", get_default()) : help();
if (type() == "choice") {
help_str = str_replace(help_str, "%choices", str_join("|", _choices.begin(), _choices.end()));
}
ss << str_format(help_str, opt_width, width, false, indent_first);
}
return ss.str();
}
Option& Option::action(const string& a) {
_action = a;
if (a == "store_const" || a == "store_true" || a == "store_false" ||
a == "append_const" || a == "count" || a == "help" || a == "version") {
nargs(0);
} else if (a == "callback") {
nargs(0);
type("");
}
return *this;
}
Option& Option::type(const std::string& t) {
_type = t;
nargs((t == "") ? 0 : 1);
return *this;
}
const std::string& Option::get_default() const {
strMap::const_iterator it = _parser._defaults.find(dest());
if (it != _parser._defaults.end())
return it->second;
else
return _default;
}
////////// } class Option //////////
}