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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef LIBNETDATA_OS_TIMESTAMPS_H
#define LIBNETDATA_OS_TIMESTAMPS_H
// Windows file time starts on January 1, 1601, Unix epoch starts on January 1, 1970
// Difference in 100-nanosecond intervals between these two dates is 116444736000000000ULL
// Convert Windows file time (in 100-nanosecond intervals) to Unix epoch in nanoseconds
#define os_windows_ulonglong_to_unix_epoch_ns(ft) (((uint64_t)(ft) - 116444736000000000ULL) * 100ULL)
// Convert Unix epoch time (in nanoseconds) to Windows file time (in 100-nanosecond intervals)
#define os_unix_epoch_ns_to_windows_ulonglong(ns) (((uint64_t)(ns) / 100ULL) + 116444736000000000ULL)
#if defined(OS_WINDOWS)
// Convert FILETIME to Unix epoch in nanoseconds
#define os_filetime_to_unix_epoch_ns(ft) \
((((uint64_t)(ft).dwHighDateTime << 32 | (ft).dwLowDateTime) - 116444736000000000ULL) * 100ULL)
// Convert Unix epoch in nanoseconds to FILETIME (returns FILETIME)
#define os_unix_epoch_ns_to_filetime(ns) \
({ \
uint64_t temp = ((uint64_t)(ns) / 100ULL) + 116444736000000000ULL; \
FILETIME ft; \
ft.dwLowDateTime = (uint32_t)(temp & 0xFFFFFFFF); \
ft.dwHighDateTime = (uint32_t)(temp >> 32); \
ft; \
})
// Convert Unix epoch in microseconds to FILETIME (returns FILETIME)
#define os_unix_epoch_ut_to_filetime(ns) \
({ \
uint64_t temp = ((uint64_t)(ns) * 10ULL) + 116444736000000000ULL; \
FILETIME ft; \
ft.dwLowDateTime = (uint32_t)(temp & 0xFFFFFFFF); \
ft.dwHighDateTime = (uint32_t)(temp >> 32); \
ft; \
})
#endif //OS_WINDOWS
#endif //LIBNETDATA_OS_TIMESTAMPS_H
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