Added project/solution files for Visual Studio 2012.

[mutilities/MUtilities.git] / src / Global.cpp

diff --git a/src/Global.cpp b/src/Global.cpp
index 17db27c..42d2189 100644 (file)
--- a/src/Global.cpp
+++ b/src/Global.cpp
@@ -1,6 +1,6 @@
 ///////////////////////////////////////////////////////////////////////////////
 // MuldeR's Utilities for Qt
-// Copyright (C) 2004-2014 LoRd_MuldeR <MuldeR2@GMX.de>
+// Copyright (C) 2004-2015 LoRd_MuldeR <MuldeR2@GMX.de>
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Lesser General Public
@@ -110,6 +110,23 @@ QString MUtils::rand_str(const bool &bLong)
 }
 
 ///////////////////////////////////////////////////////////////////////////////
+// COMPUTE PARITY
+///////////////////////////////////////////////////////////////////////////////
+
+/*
+ * Compute parity in parallel
+ * http://www.graphics.stanford.edu/~seander/bithacks.html#ParityParallel
+ */
+bool MUtils::parity(quint32 value)
+{
+       value ^= value >> 16;
+       value ^= value >> 8;
+       value ^= value >> 4;
+       value &= 0xf;
+       return ((0x6996 >> value) & 1) != 0;
+}
+
+///////////////////////////////////////////////////////////////////////////////
 // TEMP FOLDER
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -152,6 +169,29 @@ static MUtils::Internal::DirLock *try_init_temp_folder(const QString &baseDir)
        return NULL;
 }
 
+static bool temp_folder_cleanup_helper(const QString &tempPath)
+{
+       size_t delay = 1;
+       static const size_t MAX_DELAY = 8192;
+       forever
+       {
+               QDir::setCurrent(QDir::rootPath());
+               if(MUtils::remove_directory(tempPath, true))
+               {
+                       return true;
+               }
+               else
+               {
+                       if(delay > MAX_DELAY)
+                       {
+                               return false;
+                       }
+                       MUtils::OS::sleep_ms(delay);
+                       delay *= 2;
+               }
+       }
+}
+
 static void temp_folder_cleaup(void)
 {
        QWriteLocker writeLock(&g_temp_folder_lock);
@@ -159,7 +199,12 @@ static void temp_folder_cleaup(void)
        //Clean the directory
        while(!g_temp_folder_file.isNull())
        {
+               const QString tempPath = g_temp_folder_file->getPath();
                g_temp_folder_file.reset(NULL);
+               if(!temp_folder_cleanup_helper(tempPath))
+               {
+                       MUtils::OS::system_message_wrn(L"Temp Cleaner", L"Warning: Not all temporary files could be removed!");
+               }
        }
 }
 
@@ -219,6 +264,8 @@ const QString &MUtils::temp_folder(void)
 // REMOVE DIRECTORY / FILE
 ///////////////////////////////////////////////////////////////////////////////
 
+static const QFile::Permissions FILE_PERMISSIONS_NONE = QFile::ReadOther | QFile::WriteOther;
+
 bool MUtils::remove_file(const QString &fileName)
 {
        QFileInfo fileInfo(fileName);
@@ -230,7 +277,7 @@ bool MUtils::remove_file(const QString &fileName)
        for(int i = 0; i < 32; i++)
        {
                QFile file(fileName);
-               file.setPermissions(QFile::ReadOther | QFile::WriteOther);
+               file.setPermissions(FILE_PERMISSIONS_NONE);
                if((!(fileInfo.exists() && fileInfo.isFile())) || file.remove())
                {
                        return true;
@@ -242,20 +289,26 @@ bool MUtils::remove_file(const QString &fileName)
        return false;
 }
 
-static bool remove_directory_helper(QDir folder)
+static bool remove_directory_helper(const QDir &folder)
 {
        if(!folder.exists())
        {
                return true;
        }
-       
        const QString dirName = folder.dirName();
-       if(dirName.isEmpty() || (!folder.cdUp()))
+       if(!dirName.isEmpty())
        {
-               return false;
+               QDir parent(folder);
+               if(parent.cdUp())
+               {
+                       QFile::setPermissions(folder.absolutePath(), FILE_PERMISSIONS_NONE);
+                       if(parent.rmdir(dirName))
+                       {
+                               return true;
+                       }
+               }
        }
-
-       return folder.rmdir(dirName);
+       return false;
 }
 
 bool MUtils::remove_directory(const QString &folderPath, const bool &recursive)
@@ -284,22 +337,10 @@ bool MUtils::remove_directory(const QString &folderPath, const bool &recursive)
 
        for(int i = 0; i < 32; i++)
        {
-               if(!folder.exists())
+               if(remove_directory_helper(folder))
                {
                        return true;
                }
-               const QString dirName = folder.dirName();
-               if(!dirName.isEmpty())
-               {
-                       QDir parent(folder);
-                       if(parent.cdUp())
-                       {
-                               if(parent.rmdir(dirName))
-                               {
-                                       return true;
-                               }
-                       }
-               }
                folder.refresh();
        }
        
@@ -499,7 +540,7 @@ int MUtils::Internal::selfTest(const char *const buildKey, const bool debug)
        static const bool MY_DEBUG_FLAG = MUTILS_DEBUG;
        static const char *const MY_BUILD_KEY = __DATE__"@"__TIME__;
 
-       if(strncmp(buildKey, MY_BUILD_KEY, 14) || (MY_DEBUG_FLAG != debug))
+       if(strncmp(buildKey, MY_BUILD_KEY, 13) || (MY_DEBUG_FLAG != debug))
        {
                MUtils::OS::system_message_err(L"MUtils", L"FATAL ERROR: MUtils library version mismatch detected!");
                MUtils::OS::system_message_wrn(L"MUtils", L"Please re-build the complete solution in order to fix this issue!");