Use q20::{cmp_{equal,not_equal,{less,greater}{,_equal}} around the code

- edited a few places that compare signed and unsigned integer
variables, using C-style casts. The cmp_<name> functions allow
to do such comparisons in a convenient way.

Task-number: QTBUG-105464
Change-Id: I912893a47a1c93d163b0fbeccb61602adca80dd2
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>

src/gui/image/qimage_conversions.cpp

@@ -24,6 +24,8 @@
 #endif
 #endif
 
+#include <QtCore/q20utility.h>
+
 QT_BEGIN_NAMESPACE
 
 struct QDefaultColorTables
@@ -1773,7 +1775,7 @@ void dither_to_Mono(QImageData *dst, const QImageData *src,
                     }
                 } else {
                     while (p < end) {
-                        if ((uint)qGray(*p++) < qt_bayer_matrix[j++&15][i&15])
+                        if (q20::cmp_less(qGray(*p++), qt_bayer_matrix[j++&15][i&15]))
                             *m |= 1 << bit;
                         if (bit == 0) {
                             m++;

src/gui/text/qtextdocument_p.cpp

@@ -17,6 +17,8 @@
 #include "qtexttable.h"
 #include "qtextengine_p.h"
 
+#include <QtCore/q20utility.h>
+
 #include <stdlib.h>
 
 QT_BEGIN_NAMESPACE
@@ -461,13 +463,13 @@ int QTextDocumentPrivate::remove_string(int pos, uint length, QTextUndoCommand::
 {
     Q_ASSERT(pos >= 0);
     Q_ASSERT(blocks.length() == fragments.length());
-    Q_ASSERT(blocks.length() >= pos+(int)length);
+    Q_ASSERT(q20::cmp_greater_equal(blocks.length(), pos+length));
 
     int b = blocks.findNode(pos);
     uint x = fragments.findNode(pos);
 
     Q_ASSERT(blocks.size(b) > length);
-    Q_ASSERT(x && fragments.position(x) == (uint)pos && fragments.size(x) == length);
+    Q_ASSERT(x && q20::cmp_equal(fragments.position(x), pos) && fragments.size(x) == length);
     Q_ASSERT(noBlockInString(QStringView{text}.mid(fragments.fragment(x)->stringPosition, length)));
 
     blocks.setSize(b, blocks.size(b)-length);
@@ -725,7 +727,7 @@ void QTextDocumentPrivate::setCharFormat(int pos, int length, const QTextCharFor
         appendUndoItem(c);
 
         pos += length;
-        Q_ASSERT(pos == (int)(it.position() + fragment->size_array[0]) || pos >= endPos);
+        Q_ASSERT(q20::cmp_equal(pos, (it.position() + fragment->size_array[0])) || pos >= endPos);
     }
 
     int n = fragments.findNode(startPos - 1);
@@ -1036,7 +1038,7 @@ void QTextDocumentPrivate::appendUndoItem(const QTextUndoCommand &c)
         clearUndoRedoStacks(QTextDocument::RedoStack);
 
     if (editBlock != 0 && editBlockCursorPosition >= 0) { // we had a beginEditBlock() with a cursor position
-        if (c.pos != (quint32) editBlockCursorPosition) { // and that cursor position is different from the command
+        if (q20::cmp_not_equal(c.pos, editBlockCursorPosition)) { // and that cursor position is different from the command
             // generate a CursorMoved undo item
             QT_INIT_TEXTUNDOCOMMAND(cc, QTextUndoCommand::CursorMoved, true, QTextUndoCommand::MoveCursor,
                                     0, 0, editBlockCursorPosition, 0, 0);

src/plugins/platforms/linuxfb/qlinuxfbscreen.cpp

@@ -6,6 +6,7 @@
 #include <QtFbSupport/private/qfbwindow_p.h>
 #include <QtCore/QFile>
 #include <QtCore/QRegularExpression>
+#include <QtCore/q20utility.h>
 #include <QtGui/QPainter>
 
 #include <private/qcore_unix_p.h> // overrides QT_OPEN
@@ -69,16 +70,16 @@ static QRect determineGeometry(const fb_var_screeninfo &vinfo, const QRect &user
     if (userGeometry.isValid()) {
         w = userGeometry.width();
         h = userGeometry.height();
-        if ((uint)w > vinfo.xres)
+        if (q20::cmp_greater(w, vinfo.xres))
             w = vinfo.xres;
-        if ((uint)h > vinfo.yres)
+        if (q20::cmp_greater(h, vinfo.yres))
             h = vinfo.yres;
 
         int xxoff = userGeometry.x(), yyoff = userGeometry.y();
         if (xxoff != 0 || yyoff != 0) {
-            if (xxoff < 0 || xxoff + w > (int)(vinfo.xres))
+            if (xxoff < 0 || q20::cmp_greater(xxoff + w, vinfo.xres))
                 xxoff = vinfo.xres - w;
-            if (yyoff < 0 || yyoff + h > (int)(vinfo.yres))
+            if (yyoff < 0 || q20::cmp_greater(yyoff + h, vinfo.yres))
                 yyoff = vinfo.yres - h;
             xoff += xxoff;
             yoff += yyoff;

src/widgets/itemviews/qtreeview.cpp

@@ -2840,7 +2840,7 @@ void QTreeView::expandToDepth(int depth)
     d->interruptDelayedItemsLayout();
     d->layout(-1);
     for (int i = 0; i < d->viewItems.size(); ++i) {
-        if (d->viewItems.at(i).level <= (uint)depth) {
+        if (q20::cmp_less_equal(d->viewItems.at(i).level, depth)) {
             d->viewItems[i].expanded = true;
             d->layout(i);
             d->storeExpanded(d->viewItems.at(i).index);
@@ -3463,7 +3463,7 @@ void QTreeViewPrivate::layout(int i, bool recursiveExpanding, bool afterIsUninit
         }
         viewItems.resize(count);
         afterIsUninitialized = true;
-    } else if (viewItems[i].total != (uint)count) {
+    } else if (q20::cmp_not_equal(viewItems[i].total, count)) {
         if (!afterIsUninitialized)
             insertViewItems(i + 1, count, QTreeViewItem()); // expand
         else if (count > 0)

src/widgets/styles/qstyle.cpp

@@ -14,6 +14,7 @@
 #ifndef QT_NO_DEBUG
 #include "qdebug.h"
 #endif
+#include <QtCore/q20utility.h>
 
 #include <limits.h>
 #include <algorithm>
@@ -2234,7 +2235,7 @@ int QStyle::sliderPositionFromValue(int min, int max, int logicalValue, int span
     if (range > (uint)INT_MAX/4096) {
         double dpos = (double(p))/(double(range)/span);
         return int(dpos);
-    } else if (range > (uint)span) {
+    } else if (q20::cmp_greater(range, span)) {
         return (2 * p * span + range) / (2*range);
     } else {
         uint div = span / range;
@@ -2273,7 +2274,7 @@ int QStyle::sliderValueFromPosition(int min, int max, int pos, int span, bool up
 
     const qint64 range = qint64(max) - min;
 
-    if ((uint)span > range) {
+    if (q20::cmp_greater(span, range)) {
         const int tmp = (2 * range * pos + span) / (qint64(2) * span);
         return upsideDown ? max - tmp : tmp + min;
     } else {