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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 <regina-config.h>
#include <thread>
#include "core/engine.h"
#include "utilities/intutils.h"
namespace regina {
const char* versionString() {
return PACKAGE_VERSION;
}
int versionMajor() {
return PACKAGE_VERSION_MAJOR;
}
int versionMinor() {
return PACKAGE_VERSION_MINOR;
}
const char* buildInfo() {
return BUILD_INFO;
}
bool versionUsesUTF8(const char* version) {
// No version is fine.
// Also any version that does not begin with 0-4 is fine.
if (version[0] < '0' || version[0] > '4')
return true;
if (version[0] < '4') {
// Deal with 0.x .. 3.x.
// Unless this is the beginning of a larger number,
// this is a bad version.
return (version[0] != '0' &&
version[1] >= '0' && version[1] <= '9');
} else {
// The 4.x case is a bit messier to deal with.
// If it's the beginning of a larger number, we're fine.
if (version[1] >= '0' && version[1] <= '9')
return true;
// Definitely begins with 4 and 4 alone.
// The only way to save ourselves is to have 4.x for x >= 5.
if (version[1] != '.')
return false;
// We definitely begin with "4.".
// The only good possibilities now are to begin with:
// - 4.[number larger than 4]
if (version[2] == '0')
return false;
else if (version[2] >= '1' && version[2] <= '4')
return (version[3] >= '0' && version[3] <= '9');
else if (version[2] >= '5' && version[2] <= '9')
return true;
else
return false;
}
}
const char* versionSnapPy() {
return SNAPPY_VERSION;
}
const char* versionSnapPea() {
return SNAPPY_VERSION;
}
bool hasInt128() {
#ifdef INT128_AVAILABLE
return true;
#else
return false;
#endif
}
int politeThreads() {
int result = std::thread::hardware_concurrency() / 2;
if (result < 1)
result = 1;
return result;
}
int testEngine(int value) {
return value;
}
} // namespace regina
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