Add QBT_APP_64BIT define

Now we use QT_POINTER_SIZE to detect CPU bitness, it has the advantage of applicable to all CPU
architectures not limiting to x86 arch.

src/app/stacktracedialog.h

@@ -50,7 +50,7 @@ public:
     void setStacktraceString(const QString &sigName, const QString &trace)
     {
         // try to call Qt function as less as possible
-        QString htmlStr = QString(
+        const QString htmlStr = QString(
             "<p align=center><b><font size=7 color=red>"
             "qBittorrent has crashed"
             "</font></b></p>"
@@ -61,21 +61,18 @@ public:
             "</p></font>"
             "<br/><hr><br/>"
             "<p align=center><font size=4>"
-#if defined(__x86_64__) || defined(_M_X64)
-            "qBittorrent version: " QBT_VERSION " (64-bit)<br/>"
-#else
-            "qBittorrent version: " QBT_VERSION " (32-bit)<br/>"
-#endif
-            "Libtorrent version: %1<br/>"
+            "qBittorrent version: " QBT_VERSION " (%1-bit)<br/>"
+            "Libtorrent version: %2<br/>"
             "Qt version: " QT_VERSION_STR "<br/>"
-            "Boost version: %2<br/>"
-            "OpenSSL version: %3<br/>"
-            "OS version: %4<br/><br/>"
-            "Caught signal: %5"
+            "Boost version: %3<br/>"
+            "OpenSSL version: %4<br/>"
+            "OS version: %5<br/><br/>"
+            "Caught signal: %6"
             "</font></p>"
-            "<pre><code>%6</code></pre>"
+            "<pre><code>%7</code></pre>"
             "<br/><hr><br/><br/>")
-                .arg(Utils::Misc::libtorrentVersionString()
+                .arg(QString::number(QT_POINTER_SIZE * 8)
+                     , Utils::Misc::libtorrentVersionString()
                      , Utils::Misc::boostVersionString()
                      , Utils::Misc::opensslVersionString()
                      , Utils::Misc::osName()

src/base/bittorrent/session.cpp

@@ -2777,7 +2777,7 @@ int Session::diskCacheSize() const
 {
     int size = m_diskCacheSize;
     // These macros may not be available on compilers other than MSVC and GCC
-#if defined(__x86_64__) || defined(_M_X64)
+#ifdef QBT_APP_64BIT
     size = qMin(size, 4096);  // 4GiB
 #else
     // When build as 32bit binary, set the maximum at less than 2GB to prevent crashes
@@ -2789,7 +2789,7 @@ int Session::diskCacheSize() const
 
 void Session::setDiskCacheSize(int size)
 {
-#if defined(__x86_64__) || defined(_M_X64)
+#ifdef QBT_APP_64BIT
     size = qMin(size, 4096);  // 4GiB
 #else
     // allocate 1536MiB and leave 512MiB to the rest of program data in RAM

src/base/global.h

@@ -31,6 +31,10 @@
 #include <type_traits>
 #include <QtGlobal>
 
+#if (QT_POINTER_SIZE == 8)
+#define QBT_APP_64BIT
+#endif
+
 const char C_TORRENT_FILE_EXTENSION[] = ".torrent";
 
 template <typename T>

src/gui/aboutdialog.h

@@ -48,11 +48,7 @@ public:
         setAttribute(Qt::WA_DeleteOnClose);
 
         // Title
-#if defined(__x86_64__) || defined(_M_X64)
-        labelName->setText("<b><h2>qBittorrent " QBT_VERSION " (64-bit)</h2></b>");
-#else
-        labelName->setText("<b><h2>qBittorrent " QBT_VERSION " (32-bit)</h2></b>");
-#endif
+        labelName->setText(QString("<b><h2>qBittorrent " QBT_VERSION " (%1-bit)</h2></b>").arg(QT_POINTER_SIZE * 8));
 
         logo->setPixmap(Utils::Gui::scaledPixmapSvg(":/icons/skin/qbittorrent-tray.svg", this, 32));
 

src/gui/advancedsettings.cpp

@@ -325,7 +325,7 @@ void AdvancedSettings::loadAdvancedSettings()
     // Checking Memory Usage
     spinBoxCheckingMemUsage.setMinimum(1);
     // When build as 32bit binary, set the maximum value lower to prevent crashes.
-#if (QT_POINTER_SIZE == 8)
+#ifdef QBT_APP_64BIT
     spinBoxCheckingMemUsage.setMaximum(1024);
 #else
     // Allocate at most 128MiB out of the remaining 512MiB (see the cache part below)
@@ -339,7 +339,7 @@ void AdvancedSettings::loadAdvancedSettings()
     spinBoxCache.setMinimum(-1);
     // When build as 32bit binary, set the maximum at less than 2GB to prevent crashes.
     // These macros may not be available on compilers other than MSVC and GCC
-#if defined(__x86_64__) || defined(_M_X64)
+#ifdef QBT_APP_64BIT
     spinBoxCache.setMaximum(4096);
 #else
     // allocate 1536MiB and leave 512MiB to the rest of program data in RAM