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/**
* Timestamp Functions
* (C) 1999-2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/timer.h>
#include <botan/loadstor.h>
#include <ctime>
namespace Botan {
/**
* Get the system clock
*/
u64bit system_time()
{
return static_cast<u64bit>(std::time(0));
}
/*
* Convert a time_t to a struct tm
*/
std::tm time_t_to_tm(u64bit timer)
{
std::time_t time_val = static_cast<std::time_t>(timer);
std::tm* tm_p = std::gmtime(&time_val);
if (tm_p == 0)
throw Encoding_Error("time_t_to_tm could not convert");
return (*tm_p);
}
/**
* Read the clock and return the output
*/
void Timer::poll(Entropy_Accumulator& accum)
{
const u64bit clock_value = this->clock();
accum.add(clock_value, 0);
}
/**
* Combine a two time values into a single one
*/
u64bit Timer::combine_timers(u32bit seconds, u32bit parts, u32bit parts_hz)
{
static const u64bit NANOSECONDS_UNITS = 1000000000;
u64bit res = seconds * NANOSECONDS_UNITS;
res += parts * (NANOSECONDS_UNITS / parts_hz);
return res;
}
/**
* ANSI Clock
*/
u64bit ANSI_Clock_Timer::clock() const
{
return combine_timers(std::time(0), std::clock(), CLOCKS_PER_SEC);
}
}
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