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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* 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 <fstream>
#include <sstream>
#include "foreign/dehydration.h"
#include "packet/container.h"
#include "packet/text.h"
#include "triangulation/dim3.h"
namespace regina {
std::shared_ptr<Container> readDehydrationList(const char *filename,
unsigned colDehydrations, int colLabels, unsigned long ignoreLines) {
// Open the file.
std::ifstream in(filename);
if (! in)
return nullptr;
// Ignore the specified number of lines.
std::string line;
unsigned long i;
for (i = 0; i < ignoreLines; i++) {
std::getline(in, line);
if (in.eof())
return std::make_shared<Container>();
}
// Read in and process the remaining lines.
std::shared_ptr<Container> ans = std::make_shared<Container>();
std::string errStrings;
int col;
std::string token;
std::string dehydration;
std::string label;
while(! in.eof()) {
// Read in the next line.
line.clear();
std::getline(in, line);
if (line.empty())
continue;
// Find the appropriate tokens.
std::istringstream tokens(line);
dehydration.clear();
label.clear();
for (col = 0; col <= static_cast<int>(colDehydrations) ||
col <= colLabels; col++) {
tokens >> token;
if (token.empty())
break;
if (col == static_cast<int>(colDehydrations))
dehydration = token;
if (col == colLabels)
label = token;
}
if (! dehydration.empty()) {
// Process this dehydration string.
try {
ans->append(make_packet(
Triangulation<3>::rehydrate(dehydration),
(label.empty() ? dehydration : label)));
} catch (const InvalidArgument&) {
errStrings += '\n';
errStrings += dehydration;
}
}
}
// Finish off.
if (! errStrings.empty()) {
auto errPkt = std::make_shared<Text>(std::string(
"The following dehydration string(s) could not be rehydrated:\n") +
errStrings);
errPkt->setLabel("Errors");
ans->append(errPkt);
}
return ans;
}
} // namespace regina
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