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elastix.h
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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef elastix_h
#define elastix_h
#include <cassert>
#include <ctime>
#include <cmath> // For fmod.
#include <iomanip> // std::setprecision
#include <sstream>
#include <string>
inline std::string
ConvertSecondsToDHMS(const double totalSeconds, const unsigned int precision = 0)
{
const std::size_t secondsPerMinute = 60;
const std::size_t secondsPerHour = 60 * secondsPerMinute;
const std::size_t secondsPerDay = 24 * secondsPerHour;
std::size_t iSeconds = static_cast<std::size_t>(totalSeconds);
const std::size_t days = iSeconds / secondsPerDay;
iSeconds %= secondsPerDay;
const std::size_t hours = iSeconds / secondsPerHour;
iSeconds %= secondsPerHour;
const std::size_t minutes = iSeconds / secondsPerMinute;
// iSeconds %= secondsPerMinute;
// const std::size_t seconds = iSeconds;
const double dSeconds = std::fmod(totalSeconds, 60.0);
bool nonzero = false;
std::ostringstream make_string;
if (days != 0)
{
make_string << days << "d";
nonzero = true;
}
if (hours != 0 || nonzero)
{
make_string << hours << "h";
nonzero = true;
}
if (minutes != 0 || nonzero)
{
make_string << minutes << "m";
}
make_string << std::showpoint << std::fixed << std::setprecision(precision);
make_string << dSeconds << "s";
return make_string.str();
} // end ConvertSecondsToDHMS()
inline std::string
GetCurrentDateAndTime()
{
// Obtain current time
const std::time_t rawtime{ std::time(nullptr) };
// Convert to local time
// Note: std::localtime is not threadsafe!
const std::tm * const localTimePtr{ std::localtime(&rawtime) };
if (localTimePtr == nullptr)
{
assert(!"std::localtime should not return null!");
return {};
}
// Make a copy of the internal object from std::localtime, to reduce the
// risk of a race condition.
const std::tm localTimeValue(*localTimePtr);
constexpr std::size_t maxNumberOfChars{ 32 };
char timeAsString[maxNumberOfChars]{};
static_assert(maxNumberOfChars > sizeof("Thu Aug 23 14:55:02 2001"),
"timeAsString should be large enough to hold a typical example date and time");
if (std::strftime(timeAsString, maxNumberOfChars, "%c", &localTimeValue) == 0)
{
assert(!"std::strftime has failed!");
return {};
}
return timeAsString;
} // end GetCurrentDateAndTime()
#endif
ConvertSecondsToDHMS
std::string ConvertSecondsToDHMS(const double totalSeconds, const unsigned int precision=0)
Definition elastix.h:33
GetCurrentDateAndTime
std::string GetCurrentDateAndTime()
Definition elastix.h:82

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