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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Convert old-style binary data files to new-style XML *
* *
* 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 "packet/packet.h"
#include <cstdlib>
#include <cstring>
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 << " [ -2 | -3 ] [ -x | -u ]"
<< " <old-file> [ <new-file> ]\n"
" " << progName << " [ -v, --version | -?, --help ]\n";
std::cerr << std::endl;
std::cerr << " -2 : Convert to the old second-generation format used by Regina 3.0-6.0.1\n";
std::cerr << " -3 : Convert to the current third-generation file format (default)\n";
std::cerr << std::endl;
std::cerr << " -x : Convert to compressed XML (default)\n";
std::cerr << " -u : Convert to uncompressed XML\n\n";
std::cerr << " -v, --version : Show which version of Regina "
"is being used\n";
std::cerr << " -?, --help : Display this help\n";
std::cerr << std::endl;
std::cerr << " <new-file> may be the same as <old-file>.\n";
std::cerr << " <new-file> defaults to standard output (implies -u).\n";
exit(1);
}
int main(int argc, char* argv[]) {
std::string oldFile, newFile;
char typeOpt = 0;
char versionOpt = 0;
// Parse command line.
char optChar;
for (int i = 1; i < argc; i++) {
if (*argv[i] == '-') {
// 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);
}
// Option.
if (! argv[i][1])
usage(argv[0], std::string("Invalid option: ") + argv[i]);
else if (argv[i][2])
usage(argv[0], std::string("Invalid option: ") + argv[i]);
// Argument has length 2.
optChar = argv[i][1];
if (optChar == 'x' || optChar == 'u') {
if (typeOpt)
usage(argv[0],
"More than one file type has been specified.");
else
typeOpt = optChar;
} else if (optChar == '2' || optChar == '3') {
if (versionOpt)
usage(argv[0],
"More than one file format version has been specified.");
else
versionOpt = optChar;
} else
usage(argv[0], std::string("Invalid option: ") + argv[i]);
} else if (*argv[i]) {
// Filename.
if (oldFile.empty())
oldFile = argv[i];
else if (newFile.empty())
newFile = argv[i];
else
usage(argv[0], "More than two files have been specified.");
} else
usage(argv[0], "Empty arguments are not allowed.");
}
if (oldFile.empty())
usage(argv[0], "No files have been specified.");
// Add default options.
if (! typeOpt)
typeOpt = (newFile.empty() ? 'u' : 'x');
regina::FileFormat version = (versionOpt == '2' ?
regina::FileFormat::XmlGen2 : regina::FileFormat::XmlGen3);
// Check we're allowed to use stdout if we've asked for it.
if (newFile.empty() && typeOpt != 'u')
usage(argv[0],
"Only uncompressed XML can be written to standard output.");
// Read the old file.
std::shared_ptr<regina::Packet> tree = regina::open(oldFile.c_str());
if (! tree) {
std::cerr << "File " << oldFile << " could not be read.\n";
return 1;
}
// Write the new file.
bool result;
if (newFile.empty()) {
// Standard output
if (typeOpt == 'u') {
tree->writeXMLFile(std::cout, version);
result = true;
} else
result = false;
newFile = "<stdout>"; // (for error messages)
} else {
// Real output file.
// Use compressed / uncompressed XML
result = tree->save(newFile.c_str(), typeOpt == 'x', version);
}
if (! result) {
std::cerr << "File " << newFile << " could not be written.\n";
return 1;
}
return 0;
}
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