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Diffstat (limited to 'src/lib/util/timeconv.h')
-rw-r--r-- | src/lib/util/timeconv.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/lib/util/timeconv.h b/src/lib/util/timeconv.h new file mode 100644 index 00000000000..5d3d4d4905c --- /dev/null +++ b/src/lib/util/timeconv.h @@ -0,0 +1,53 @@ +// license:BSD-3-Clause +// copyright-holders:Vas Crabb, Nathan Woods +/*************************************************************************** + + timeconv.h + + Time conversion utility code + +***************************************************************************/ + +#ifndef MAME_LIB_UTIL_TIMECONV_H +#define MAME_LIB_UTIL_TIMECONV_H + +#pragma once + +#include "osdcore.h" + +#include <chrono> + + +namespace util { + +/*************************************************************************** + TYPE DEFINITIONS +***************************************************************************/ + +typedef std::chrono::duration<std::uint64_t, std::ratio<1, 10000000> > ntfs_duration; + + +/*************************************************************************** + INLINE FUNCTIONS +***************************************************************************/ + +// ------------------------------------------------- +// ntfs_duration_from_filetime +// ------------------------------------------------- + +inline constexpr ntfs_duration ntfs_duration_from_filetime(std::uint32_t high, std::uint32_t low) +{ + return ntfs_duration((std::uint64_t(high) << 32) | std::uint64_t(low)); +} + + +/*************************************************************************** + FUNCTION PROTOTYPES +***************************************************************************/ + +std::chrono::system_clock::time_point system_clock_time_point_from_ntfs_duration(ntfs_duration d); + + +} // namespace util + +#endif // MAME_LIB_UTIL_TIMECONV_H |