/** * Time Functions * (C) 1999-2010 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_WIN32_GET_SYSTEMTIME) #include <windows.h> #endif #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) { std::tm tm; #if defined(BOTAN_TARGET_OS_HAS_GMTIME_S) gmtime_s(&tm, &time_val); // Windows #elif defined(BOTAN_TARGET_OS_HAS_GMTIME_R) gmtime_r(&time_val, &tm); // Unix/SUSv2 #else std::tm* tm_p = std::gmtime(&time_val); if (tm_p == 0) throw Encoding_Error("time_t_to_tm could not convert"); tm = *tm_p; #endif return tm; } } /** * Get the system clock */ u64bit system_time() { return static_cast<u64bit>(std::time(0)); } /* * Convert a time_point to a calendar_point */ calendar_point calendar_value(u64bit a_time_t) { std::tm tm = do_gmtime(static_cast<std::time_t>(a_time_t)); 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); #elif defined(BOTAN_TARGET_OS_HAS_WIN32_GET_SYSTEMTIME) // Returns time since January 1, 1601 in 100-ns increments ::FILETIME tv; ::GetSystemTimeAsFileTime(&tv); u64bit tstamp = (static_cast<u64bit>(tv.dwHighDateTime) << 32) | tv.dwLowDateTime; return (tstamp * 100); // Scale to 1 nanosecond units #else return combine_timers(static_cast<u32bit>(std::time(0)), std::clock(), CLOCKS_PER_SEC); #endif } }