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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Combine several data files into a single larger data file *
* *
* 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 <list>
#include "packet/container.h"
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 <<
" [ -o <output-file> ] <data-file> ...\n"
" " << progName << " [ -v, --version | -?, --help ]\n";
std::cerr << std::endl;
std::cerr << " -o <output-file> : Write to the given data file "
"(otherwise standard\n";
std::cerr << " output is used)\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[]) {
// Parse the command line.
std::list<std::string> files;
std::string outputFile;
for (int i = 1; i < argc; i++) {
if (*argv[i] == '-') {
// Option.
// Standard arguments:
if (strcmp(argv[i], "-?") == 0 || strcmp(argv[i], "--help") == 0)
usage(argv[0]);
if (strcmp(argv[i], "-v") == 0 ||
strcmp(argv[i], "--version") == 0) {
if (argc != 2)
usage(argv[0], "Option --version cannot be "
"used with any other arguments.");
std::cout << PACKAGE_BUILD_STRING << std::endl;
exit(0);
}
// Is it an argument we don't understand?
if (strcmp(argv[i], "-o") != 0)
usage(argv[0], std::string("Invalid option: ") + argv[i]);
// Are we missing the actual output filename?
if (i == argc - 1)
usage(argv[0], "Option -o is missing an output filename.");
// Have we already specified an output filename?
if (! outputFile.empty())
usage(argv[0],
"More than one output filename has been supplied.");
// Suck in the output filename.
outputFile = argv[++i];
} else if (*argv[i]) {
// Just an ordinary filename.
files.emplace_back(argv[i]);
} else
usage(argv[0], "Empty arguments are not allowed.");
}
if (files.empty())
usage(argv[0], "No data files have been supplied.");
// Read the input files one by one.
std::shared_ptr<regina::Packet> ans = std::make_shared<regina::Container>();
ans->setLabel("Combined Data");
bool error = false;
for (const auto& f : files) {
std::shared_ptr<regina::Packet> data = regina::open(f.c_str());
if (!data) {
std::cerr << "File " << f << " could not be read.\n";
error = true;
continue;
}
ans->append(data);
}
// Tidy up the final data file and write it.
if (outputFile.empty())
ans->writeXMLFile(std::cout);
else if (! ans->save(outputFile.c_str())) {
std::cerr << "File " << outputFile << " could not be written.\n";
error = true;
}
return (error ? 1 : 0);
}
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