Added the set_file_time() function.

diff --git a/include/MUtils/OSSupport.h b/include/MUtils/OSSupport.h
index 623e4e4..18df60d 100644 (file)
--- a/include/MUtils/OSSupport.h
+++ b/include/MUtils/OSSupport.h
@@ -29,6 +29,9 @@
 #include <QMap>
 #include <QDate>
 
+//Forward declaration
+class QFile;
+
 ///////////////////////////////////////////////////////////////////////////////
 
 namespace MUtils
@@ -168,6 +171,10 @@ namespace MUtils
                MUTILS_API bool setup_timer_resolution(const quint32 &interval = 1);
                MUTILS_API bool reset_timer_resolution(const quint32 &interval = 1);
 
+               //Set file time
+               MUTILS_API bool set_file_time(const QFile &file,   const QDateTime &created = QDateTime(), const QDateTime &modified = QDateTime(), const QDateTime &accessed = QDateTime());
+               MUTILS_API bool set_file_time(const QString &path, const QDateTime &created = QDateTime(), const QDateTime &modified = QDateTime(), const QDateTime &accessed = QDateTime());
+
                //Keyboard support
                MUTILS_API bool check_key_state_esc(void);
 

diff --git a/src/OSSupport_Win32.cpp b/src/OSSupport_Win32.cpp
index 7822808..be00e95 100644 (file)
--- a/src/OSSupport_Win32.cpp
+++ b/src/OSSupport_Win32.cpp
@@ -32,6 +32,9 @@
 #include <ShlObj.h>
 #pragma warning(pop)
 
+//CRT
+#include <io.h>
+
 //Internal
 #include <MUtils/Global.h>
 #include <MUtils/OSSupport.h>
@@ -1160,6 +1163,89 @@ bool MUtils::OS::reset_timer_resolution(const quint32 &interval)
 }
 
 ///////////////////////////////////////////////////////////////////////////////
+// SET FILE TIME
+///////////////////////////////////////////////////////////////////////////////
+
+static QScopedPointer<QDateTime> s_epoch;
+static QReadWriteLock            s_epochLock;
+
+static const QDateTime *get_epoch(void)
+{
+       QReadLocker rdLock(&s_epochLock);
+
+       if (s_epoch.isNull())
+       {
+               rdLock.unlock();
+               QWriteLocker wrLock(&s_epochLock);
+               if (s_epoch.isNull())
+               {
+                       s_epoch.reset(new QDateTime(QDate(1601, 1, 1), QTime(0, 0, 0, 0), Qt::UTC));
+               }
+               wrLock.unlock();
+               rdLock.relock();
+       }
+
+       return s_epoch.data();
+}
+
+static FILETIME *qt_time_to_file_time(FILETIME *const fileTime, const QDateTime &dateTime)
+{
+       memset(fileTime, 0, sizeof(FILETIME));
+
+       if (const QDateTime *const epoch = get_epoch())
+       {
+               const qint64 msecs = epoch->msecsTo(dateTime);
+               if (msecs > 0)
+               {
+                       const quint64 ticks = 10000U * quint64(msecs);
+                       fileTime->dwHighDateTime = ((ticks >> 32) & 0xFFFFFFFF);
+                       fileTime->dwLowDateTime = (ticks & 0xFFFFFFFF);
+                       return fileTime;
+               }
+       }
+
+       return NULL;
+}
+
+static bool set_file_time(const HANDLE hFile, const QDateTime &created, const QDateTime &lastMod, const QDateTime &lastAcc)
+{
+       FILETIME ftCreated, ftLastMod, ftLastAcc;
+
+       FILETIME *const pCreated = created.isValid() ? qt_time_to_file_time(&ftCreated, created) : NULL;
+       FILETIME *const pLastMod = lastMod.isValid() ? qt_time_to_file_time(&ftLastMod, lastMod) : NULL;
+       FILETIME *const pLastAcc = lastAcc.isValid() ? qt_time_to_file_time(&ftLastAcc, lastAcc) : NULL;
+
+       if (pCreated || pLastMod || pLastAcc)
+       {
+               return (SetFileTime(hFile, pCreated, pLastAcc, pLastMod) != FALSE);
+       }
+
+       return false;
+}
+
+bool MUtils::OS::set_file_time(const QFile &file, const QDateTime &created, const QDateTime &lastMod, const QDateTime &lastAcc)
+{
+       const int fd = file.handle();
+       if (fd >= 0)
+       {
+               return set_file_time((HANDLE)_get_osfhandle(fd), created, lastMod, lastAcc);
+       }
+       return false;
+}
+
+bool MUtils::OS::set_file_time(const QString &path, const QDateTime &created, const QDateTime &lastMod, const QDateTime &lastAcc)
+{
+       const HANDLE hFile = CreateFileW(MUTILS_WCHR(path), FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
+       bool okay = false;
+       if ((hFile != NULL) && (hFile != INVALID_HANDLE_VALUE))
+       {
+               okay = set_file_time(hFile, created, lastMod, lastAcc);
+               CloseHandle(hFile);
+       }
+       return okay;
+}
+
+///////////////////////////////////////////////////////////////////////////////
 // CHECK KEY STATE
 ///////////////////////////////////////////////////////////////////////////////