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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Form a census of splitting surface signatures of given order *
* *
* Copyright (c) 1999-2025, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* As an exception, when this program is distributed through (i) the *
* App Store by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or *
* (iii) Google Play by Google Inc., then that store may impose any *
* digital rights management, device limits and/or redistribution *
* restrictions that are required by its terms of service. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <https://www.gnu.org/licenses/>. *
* *
**************************************************************************/
#include <cstdlib>
#include <cstring>
#include "split/sigcensus.h"
#include "utilities/stringutils.h"
#define MAXORDER 20
// Stringification of MAXORDER requires several layers of macros.
#define ORDER_STR(order) #order
#define ORDER_XSTR(order) ORDER_STR(order)
#define MAXORDER_STR ORDER_XSTR(MAXORDER)
void usage(const char* progName, const std::string& error = std::string()) {
if (! error.empty())
std::cerr << error << "\n\n";
std::cerr << "Usage:\n";
std::cerr << " " << progName << " <order>\n";
std::cerr << " " << progName
<< " [ -v, --version | -?, --help ]\n\n";
std::cerr << " -v, --version : Show which version of Regina "
"is being used\n";
std::cerr << " -?, --help : Display this help\n";
exit(1);
}
int main(int argc, char* argv[]) {
if (argc != 2)
usage(argv[0], "Please specify exactly one order.");
// Check for standard arguments:
if (strcmp(argv[1], "-?") == 0 || strcmp(argv[1], "--help") == 0)
usage(argv[0]);
if (strcmp(argv[1], "-v") == 0 || strcmp(argv[1], "--version") == 0) {
std::cout << PACKAGE_BUILD_STRING << std::endl;
exit(0);
}
int order;
bool valid = regina::valueOf(argv[1], order);
if ((! valid) || order < 1 || order > MAXORDER)
usage(argv[0],
"Only numerical orders between 1 and " MAXORDER_STR
" inclusive are accepted.");
size_t result = regina::SigCensus::formCensus(order,
[](const regina::Signature& sig,
const regina::SigCensus::IsoList&) {
sig.writeCycles(std::cout, "", "", ".");
std::cout << '\n';
});
std::cout << "Total signatures: " << result << '\n';
return 0;
}
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