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authorBjörn-Egil Dahlberg <[email protected]>2011-11-16 18:46:23 +0100
committerBjörn-Egil Dahlberg <[email protected]>2011-12-02 15:41:13 +0100
commit98da1412fbf9fd6aa6ebcff4a014bf9bbc45d962 (patch)
treea40f33d87aaaa06fd5df3f0efdc453387a029239
parent3c5f8d903787b24a3d0d0f4404a652e25f089765 (diff)
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Fix EPOCH <-> FILETIME conversion
-rw-r--r--erts/emulator/drivers/win32/win_efile.c51
1 files changed, 24 insertions, 27 deletions
diff --git a/erts/emulator/drivers/win32/win_efile.c b/erts/emulator/drivers/win32/win_efile.c
index 19b9384940..134c4b675f 100644
--- a/erts/emulator/drivers/win32/win_efile.c
+++ b/erts/emulator/drivers/win32/win_efile.c
@@ -45,21 +45,24 @@
#define INVALID_FILE_ATTRIBUTES ((DWORD) 0xFFFFFFFF)
#endif
-// #define TICKS_PER_SECOND 10000000
-// #define EPOCH_DIFFERENCE 11644473600LL
-// time_t convertWindowsTimeToUnixTime(long long int input){
-// long long int temp;
-// temp = input / TICKS_PER_SECOND; //convert from 100ns intervals to seconds;
-// temp = temp - EPOCH_DIFFERENCE; //subtract number of seconds between epochs
-// return (time_t) temp;
-// }
-
-#define TICKS_PER_SECOND (10000000)
+#define TICKS_PER_SECOND (10000000ULL)
#define EPOCH_DIFFERENCE (11644473600LL)
-#define FILETIME_TO_EPOCH(time) \
- (((time) / TICKS_PER_SECOND) - EPOCH_DIFFERENCE)
-#define EPOCH_TO_FILETIME(epoch) \
- (EPOCH_DIFFERENCE + ((epoch) * TICKS_PER_SECOND))
+
+#define FILETIME_TO_EPOCH(epoch, ft) \
+ do { \
+ ULARGE_INTEGER ull; \
+ ull.LowPart = (ft).dwLowDateTime; \
+ ull.HighPart = (ft).dwHighDateTime; \
+ (epoch) = ((ull.QuadPart / TICKS_PER_SECOND) - EPOCH_DIFFERENCE); \
+ } while(0)
+
+#define EPOCH_TO_FILETIME(ft, epoch) \
+ do { \
+ ULARGE_INTEGER ull; \
+ ull.QuadPart = (((epoch)*TICKS_PER_SECOND) + EPOCH_DIFFERENCE); \
+ (ft).dwLowDateTime = ull.LowPart; \
+ (ft).dwHighDateTime = ull.HighPart; \
+ } while(0)
static int check_error(int result, Efile_error* errInfo);
@@ -881,13 +884,7 @@ efile_fileinfo(Efile_error* errInfo, Efile_info* pInfo,
findbuf.cFileName[0] = L'\0';
pInfo->links = 1;
- pInfo->modifyTime.year = 1980;
- pInfo->modifyTime.month = 1;
- pInfo->modifyTime.day = 1;
- pInfo->modifyTime.hour = 0;
- pInfo->modifyTime.minute = 0;
- pInfo->modifyTime.second = 0;
-
+ pInfo->modifyTime = 0;
pInfo->accessTime = pInfo->modifyTime;
} else {
SYSTEMTIME SystemTime;
@@ -922,20 +919,20 @@ efile_fileinfo(Efile_error* errInfo, Efile_info* pInfo,
}
}
- pInfo->modifyTime = FILETIME_TO_EPOCH(findbuf.ftLastWriteTime);
+ FILETIME_TO_EPOCH(pInfo->modifyTime, findbuf.ftLastWriteTime);
if (findbuf.ftLastAccessTime.dwLowDateTime == 0 &&
findbuf.ftLastAccessTime.dwHighDateTime == 0) {
pInfo->accessTime = pInfo->modifyTime;
} else {
- pInfo->accessTime = FILETIME_TO_EPOCH(findbuf.ftLastAccessTime);
+ FILETIME_TO_EPOCH(pInfo->accessTime, findbuf.ftLastAccessTime);
}
if (findbuf.ftCreationTime.dwLowDateTime == 0 &&
findbuf.ftCreationTime.dwHighDateTime == 0) {
pInfo->cTime = pInfo->modifyTime;
} else {
- pInfo->cTime = FILETIME_TO_EPOCH(findbuf.ftCreationTime);
+ FILETIME_TO_EPOCH(pInfo->cTime ,findbuf.ftCreationTime);
}
FindClose(findhandle);
}
@@ -1002,9 +999,9 @@ efile_write_info(Efile_error* errInfo,
* Construct all file times.
*/
- ModifyFileTime = EPOCH_TO_FILETIME(pInfo->modifyTime);
- AccessFileTime = EPOCH_TO_FILETIME(pInfo->accessTime);
- CreationFileTime = EPOCH_TO_FILETIME(pInfo->cTime);
+ EPOCH_TO_FILETIME(ModifyFileTime, pInfo->modifyTime);
+ EPOCH_TO_FILETIME(AccessFileTime, pInfo->accessTime);
+ EPOCH_TO_FILETIME(CreationFileTime, pInfo->cTime);
/*
* If necessary, set the file times.