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authorwolfbeast <mcwerewolf@wolfbeast.com>2019-03-29 16:04:01 +0100
committerwolfbeast <mcwerewolf@wolfbeast.com>2019-03-29 16:04:01 +0100
commit88083f8c683c18f4de68a20c863a82a9da65db8f (patch)
tree926656892d9d80260da02ea8ea71031b140c51df /other-licenses/7zstub/src/CPP/Windows/TimeUtils.cpp
parentf999f544aad04069b03704d994a99352263f600b (diff)
parent843e4ceffd6ce21a6e6db37419335eafdc543e18 (diff)
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Merge branch 'master' into Sync-weave
Diffstat (limited to 'other-licenses/7zstub/src/CPP/Windows/TimeUtils.cpp')
-rw-r--r--other-licenses/7zstub/src/CPP/Windows/TimeUtils.cpp213
1 files changed, 213 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CPP/Windows/TimeUtils.cpp b/other-licenses/7zstub/src/CPP/Windows/TimeUtils.cpp
new file mode 100644
index 000000000..3fc02bc86
--- /dev/null
+++ b/other-licenses/7zstub/src/CPP/Windows/TimeUtils.cpp
@@ -0,0 +1,213 @@
+// Windows/TimeUtils.cpp
+
+#include "StdAfx.h"
+
+#include "Defs.h"
+#include "TimeUtils.h"
+
+namespace NWindows {
+namespace NTime {
+
+static const UInt32 kNumTimeQuantumsInSecond = 10000000;
+static const UInt32 kFileTimeStartYear = 1601;
+static const UInt32 kDosTimeStartYear = 1980;
+static const UInt32 kUnixTimeStartYear = 1970;
+static const UInt64 kUnixTimeOffset =
+ (UInt64)60 * 60 * 24 * (89 + 365 * (kUnixTimeStartYear - kFileTimeStartYear));
+static const UInt64 kNumSecondsInFileTime = (UInt64)(Int64)-1 / kNumTimeQuantumsInSecond;
+
+bool DosTimeToFileTime(UInt32 dosTime, FILETIME &ft) throw()
+{
+ #if defined(_WIN32) && !defined(UNDER_CE)
+ return BOOLToBool(::DosDateTimeToFileTime((UInt16)(dosTime >> 16), (UInt16)(dosTime & 0xFFFF), &ft));
+ #else
+ ft.dwLowDateTime = 0;
+ ft.dwHighDateTime = 0;
+ UInt64 res;
+ if (!GetSecondsSince1601(kDosTimeStartYear + (dosTime >> 25), (dosTime >> 21) & 0xF, (dosTime >> 16) & 0x1F,
+ (dosTime >> 11) & 0x1F, (dosTime >> 5) & 0x3F, (dosTime & 0x1F) * 2, res))
+ return false;
+ res *= kNumTimeQuantumsInSecond;
+ ft.dwLowDateTime = (UInt32)res;
+ ft.dwHighDateTime = (UInt32)(res >> 32);
+ return true;
+ #endif
+}
+
+static const UInt32 kHighDosTime = 0xFF9FBF7D;
+static const UInt32 kLowDosTime = 0x210000;
+
+#define PERIOD_4 (4 * 365 + 1)
+#define PERIOD_100 (PERIOD_4 * 25 - 1)
+#define PERIOD_400 (PERIOD_100 * 4 + 1)
+
+bool FileTimeToDosTime(const FILETIME &ft, UInt32 &dosTime) throw()
+{
+ #if defined(_WIN32) && !defined(UNDER_CE)
+
+ WORD datePart, timePart;
+ if (!::FileTimeToDosDateTime(&ft, &datePart, &timePart))
+ {
+ dosTime = (ft.dwHighDateTime >= 0x01C00000) ? kHighDosTime : kLowDosTime;
+ return false;
+ }
+ dosTime = (((UInt32)datePart) << 16) + timePart;
+
+ #else
+
+ unsigned year, mon, day, hour, min, sec;
+ UInt64 v64 = ft.dwLowDateTime | ((UInt64)ft.dwHighDateTime << 32);
+ Byte ms[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+ unsigned temp;
+ UInt32 v;
+ v64 += (kNumTimeQuantumsInSecond * 2 - 1);
+ v64 /= kNumTimeQuantumsInSecond;
+ sec = (unsigned)(v64 % 60);
+ v64 /= 60;
+ min = (unsigned)(v64 % 60);
+ v64 /= 60;
+ hour = (unsigned)(v64 % 24);
+ v64 /= 24;
+
+ v = (UInt32)v64;
+
+ year = (unsigned)(kFileTimeStartYear + v / PERIOD_400 * 400);
+ v %= PERIOD_400;
+
+ temp = (unsigned)(v / PERIOD_100);
+ if (temp == 4)
+ temp = 3;
+ year += temp * 100;
+ v -= temp * PERIOD_100;
+
+ temp = v / PERIOD_4;
+ if (temp == 25)
+ temp = 24;
+ year += temp * 4;
+ v -= temp * PERIOD_4;
+
+ temp = v / 365;
+ if (temp == 4)
+ temp = 3;
+ year += temp;
+ v -= temp * 365;
+
+ if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0))
+ ms[1] = 29;
+ for (mon = 1; mon <= 12; mon++)
+ {
+ unsigned s = ms[mon - 1];
+ if (v < s)
+ break;
+ v -= s;
+ }
+ day = (unsigned)v + 1;
+
+ dosTime = kLowDosTime;
+ if (year < kDosTimeStartYear)
+ return false;
+ year -= kDosTimeStartYear;
+ dosTime = kHighDosTime;
+ if (year >= 128)
+ return false;
+ dosTime = (year << 25) | (mon << 21) | (day << 16) | (hour << 11) | (min << 5) | (sec >> 1);
+ #endif
+ return true;
+}
+
+UInt64 UnixTimeToFileTime64(UInt32 unixTime) throw()
+{
+ return (kUnixTimeOffset + (UInt64)unixTime) * kNumTimeQuantumsInSecond;
+}
+
+void UnixTimeToFileTime(UInt32 unixTime, FILETIME &ft) throw()
+{
+ UInt64 v = UnixTimeToFileTime64(unixTime);
+ ft.dwLowDateTime = (DWORD)v;
+ ft.dwHighDateTime = (DWORD)(v >> 32);
+}
+
+UInt64 UnixTime64ToFileTime64(Int64 unixTime) throw()
+{
+ return (UInt64)(kUnixTimeOffset + unixTime) * kNumTimeQuantumsInSecond;
+}
+
+bool UnixTime64ToFileTime(Int64 unixTime, FILETIME &ft) throw()
+{
+ if (unixTime > (Int64)(kNumSecondsInFileTime - kUnixTimeOffset))
+ {
+ ft.dwLowDateTime = ft.dwHighDateTime = (UInt32)(Int32)-1;
+ return false;
+ }
+ Int64 v = (Int64)kUnixTimeOffset + unixTime;
+ if (v < 0)
+ {
+ ft.dwLowDateTime = ft.dwHighDateTime = 0;
+ return false;
+ }
+ UInt64 v2 = (UInt64)v * kNumTimeQuantumsInSecond;
+ ft.dwLowDateTime = (DWORD)v2;
+ ft.dwHighDateTime = (DWORD)(v2 >> 32);
+ return true;
+}
+
+Int64 FileTimeToUnixTime64(const FILETIME &ft) throw()
+{
+ UInt64 winTime = (((UInt64)ft.dwHighDateTime) << 32) + ft.dwLowDateTime;
+ return (Int64)(winTime / kNumTimeQuantumsInSecond) - (Int64)kUnixTimeOffset;
+}
+
+bool FileTimeToUnixTime(const FILETIME &ft, UInt32 &unixTime) throw()
+{
+ UInt64 winTime = (((UInt64)ft.dwHighDateTime) << 32) + ft.dwLowDateTime;
+ winTime /= kNumTimeQuantumsInSecond;
+ if (winTime < kUnixTimeOffset)
+ {
+ unixTime = 0;
+ return false;
+ }
+ winTime -= kUnixTimeOffset;
+ if (winTime > 0xFFFFFFFF)
+ {
+ unixTime = 0xFFFFFFFF;
+ return false;
+ }
+ unixTime = (UInt32)winTime;
+ return true;
+}
+
+bool GetSecondsSince1601(unsigned year, unsigned month, unsigned day,
+ unsigned hour, unsigned min, unsigned sec, UInt64 &resSeconds) throw()
+{
+ resSeconds = 0;
+ if (year < kFileTimeStartYear || year >= 10000 || month < 1 || month > 12 ||
+ day < 1 || day > 31 || hour > 23 || min > 59 || sec > 59)
+ return false;
+ UInt32 numYears = year - kFileTimeStartYear;
+ UInt32 numDays = numYears * 365 + numYears / 4 - numYears / 100 + numYears / 400;
+ Byte ms[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+ if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0))
+ ms[1] = 29;
+ month--;
+ for (unsigned i = 0; i < month; i++)
+ numDays += ms[i];
+ numDays += day - 1;
+ resSeconds = ((UInt64)(numDays * 24 + hour) * 60 + min) * 60 + sec;
+ return true;
+}
+
+void GetCurUtcFileTime(FILETIME &ft) throw()
+{
+ // Both variants provide same low resolution on WinXP: about 15 ms.
+ // But GetSystemTimeAsFileTime is much faster.
+
+ #ifdef UNDER_CE
+ SYSTEMTIME st;
+ GetSystemTime(&st);
+ SystemTimeToFileTime(&st, &ft);
+ #else
+ GetSystemTimeAsFileTime(&ft);
+ #endif
+}
+
+}}