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hardcode value of filetime epoch

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avoid unnecessary calls to SystemTimeToFileTime() in get_file_epoch() by hardcoding the FILETIME value of jan_1_1970

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2011-09-15 14:34:55 -04:00 • committed by unknown
parent 5880a8bb1d
commit 3a115a39fa
2 changed files with 22 additions and 39 deletions
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27
daemon/util.h
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@ -94,13 +94,30 @@ void nfs_to_standard_info(
IN const nfs41_file_info *info,
OUT PFILE_STANDARD_INFO std_out);
/* nfstime4 */
void file_time_to_nfs_time(
/* http://msdn.microsoft.com/en-us/library/ms724290%28VS.85%29.aspx:
* A file time is a 64-bit value that represents the number of
* 100-nanosecond intervals that have elapsed since 12:00 A.M.
* January 1, 1601 Coordinated Universal Time (UTC). */
#define FILETIME_EPOCH 116444736000000000LL
static __inline void file_time_to_nfs_time(
IN const PLARGE_INTEGER file_time,
OUT nfstime4 *nfs_time);
void nfs_time_to_file_time(
OUT nfstime4 *nfs_time)
{
LONGLONG diff = file_time->QuadPart - FILETIME_EPOCH;
nfs_time->seconds = diff / 10000000;
nfs_time->nseconds = (uint32_t)((diff % 10000000)*100);
}
static __inline void nfs_time_to_file_time(
IN const nfstime4 *nfs_time,
OUT PLARGE_INTEGER file_time);
OUT PLARGE_INTEGER file_time)
{
file_time->QuadPart = FILETIME_EPOCH +
nfs_time->seconds * 10000000 +
nfs_time->nseconds / 100;
}
void get_file_time(
OUT PLARGE_INTEGER file_time);
void get_nfs_time(