59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
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// timemath.h---written by Bill Griffin (Billgr)
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#if !defined(_TIMEMATH_H_)
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#define _TIMEMATH_H_
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const __int64 hnsPerMillisecond = 10000i64;
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const __int64 hnsPerSecond = 10000000i64;
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const __int64 hnsPerMinute = 600000000i64;
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const __int64 hnsPerHour = 36000000000i64;
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const __int64 hnsPerDay = 864000000000i64;
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inline __int64 MsFromHns(__int64 hns)
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{ return hns / hnsPerMillisecond; }
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inline __int64 SecFromHns(__int64 hns)
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{ return hns / hnsPerSecond; }
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inline __int64 MinFromHns(__int64 hns)
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{ return hns / hnsPerMinute; }
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inline __int64 HrFromHns(__int64 hns)
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{ return hns / hnsPerHour; }
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inline __int64 DayFromHns(__int64 hns)
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{ return hns / hnsPerDay; }
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inline __int64 HnsFromMs(__int64 ms)
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{ return ms * hnsPerMillisecond; }
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inline __int64 HnsFromSec(__int64 sec)
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{ return sec * hnsPerSecond; }
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inline __int64 HnsFromMin(__int64 min)
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{ return min * hnsPerMinute; }
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inline __int64 HnsFromHr(__int64 hr)
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{ return hr * hnsPerHour; }
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inline __int64 HnsFromDay(__int64 day)
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{ return day * hnsPerDay; }
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inline __int64 HnsFromFt(FILETIME ft)
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{ return *((__int64*)&ft); }
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inline __int64 HnsFromFtSpan(FILETIME ftStart, FILETIME ftEnd)
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{ return HnsFromFt(ftEnd) - HnsFromFt(ftStart); }
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inline __int64 SecFromFtSpan(FILETIME ftStart, FILETIME ftEnd)
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{ return SecFromHns(HnsFromFtSpan(ftStart, ftEnd)); }
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inline __int64 MinFromFtSpan(FILETIME ftStart, FILETIME ftEnd)
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{ return MinFromHns(HnsFromFtSpan(ftStart, ftEnd)); }
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inline __int64 HrFromFtSpan(FILETIME ftStart, FILETIME ftEnd)
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{ return HrFromHns(HnsFromFtSpan(ftStart, ftEnd)); }
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inline __int64 DayFromFtSpan(FILETIME ftStart, FILETIME ftEnd)
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{ return DayFromHns(HnsFromFtSpan(ftStart, ftEnd)); }
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//NimishK - some more good stuff related to the time math issues
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#define I64_LI(cli) (*((__int64*)&cli))
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#define LI_I64(i) (*((LARGE_INTEGER*)&i))
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#define INT64_FROM_LARGE_INTEGER(cli) I64_LI(cli)
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#define LARGE_INTEGER_FROM_INT64(i) LI_I64(i)
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#define I64_FT(ft) (*((__int64*)&ft))
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#define FT_I64(i) (*((FILETIME*)&i))
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#define INT64_FROM_FILETIME(ft) I64_FT(ft)
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#define FILETIME_FROM_INT64(i) FT_I64(i)
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#endif // !defined(_TIMEMATH_H_)
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