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/**
* Time Functions
* (C) 1999-2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/time.h>
#include <botan/exceptn.h>
#include <ctime>
#if defined(BOTAN_TARGET_OS_HAS_GETTIMEOFDAY)
#include <sys/time.h>
#endif
#if defined(BOTAN_TARGET_OS_HAS_CLOCK_GETTIME)
#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 199309
#endif
#include <time.h>
#ifndef CLOCK_REALTIME
#define CLOCK_REALTIME 0
#endif
#endif
namespace Botan {
namespace {
/**
* Combine a two time values into a single one
*/
u64bit 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;
}
std::tm do_gmtime(time_t time_val)
{
// Race condition: std::gmtime is not assured thread safe,
// and C++ does not include gmtime_r. Use a mutex here?
std::tm* tm_p = std::gmtime(&time_val);
if (tm_p == 0)
throw Encoding_Error("calendar_value could not convert with gmtime");
return *tm_p;
}
}
/*
* Convert a time_point to a calendar_point
*/
calendar_point calendar_value(
const std::chrono::system_clock::time_point& time_point)
{
std::tm tm = do_gmtime(std::chrono::system_clock::to_time_t(time_point));
return calendar_point(tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec);
}
u64bit get_nanoseconds_clock()
{
#if defined(BOTAN_TARGET_OS_HAS_CLOCK_GETTIME)
struct ::timespec tv;
::clock_gettime(CLOCK_REALTIME, &tv);
return combine_timers(tv.tv_sec, tv.tv_nsec, 1000000000);
#elif defined(BOTAN_TARGET_OS_HAS_GETTIMEOFDAY)
struct ::timeval tv;
::gettimeofday(&tv, 0);
return combine_timers(tv.tv_sec, tv.tv_usec, 1000000);
#else
return combine_timers(std::time(0), std::clock(), CLOCKS_PER_SEC);
#endif
}
}
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