Changeset 561 for trunk/src/gui/text/qfragmentmap_p.h

Timestamp:

Feb 11, 2010, 11:19:06 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.1 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/gui/text/qfragmentmap_p.h (modified) (9 diffs)

trunk/src/gui/text/qfragmentmap_p.h

@@ -2 +2 @@
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtGui module of the Qt Toolkit.
@@ -21 +22 @@
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
-** In addition, as a special exception, Nokia gives you certain
-** additional rights. These rights are described in the Nokia Qt LGPL
-** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
-** package.
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
@@ -34 +34 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
@@ -215 +215 @@
 template <class Fragment>
 QFragmentMapData<Fragment>::QFragmentMapData()
+    : fragments(0)
 {
     init();
@@ -222 +223 @@
 void QFragmentMapData<Fragment>::init()
 {
-    fragments = (Fragment *)malloc(64*fragmentSize);
+    // the following code will realloc an existing fragment or create a new one.
+    // it will also ignore errors when shrinking an existing fragment.
+    Fragment *newFragments = (Fragment *)realloc(fragments, 64*fragmentSize);
+    if (newFragments) {
+        fragments = newFragments;
+        head->allocated = 64;
+    }
+    Q_CHECK_PTR(fragments);
+
     head->tag = (((quint32)'p') << 24) | (((quint32)'m') << 16) | (((quint32)'a') << 8) | 'p'; //TAG('p', 'm', 'a', 'p');
     head->root = 0;
     head->freelist = 1;
     head->node_count = 0;
-    head->allocated = 64;
     // mark all items to the right as unused
     F(head->freelist).right = 0;
@@ -235 +243 @@
 QFragmentMapData<Fragment>::~QFragmentMapData()
 {
-    free(head);
+    free(fragments);
 }
 
@@ -248 +256 @@
         uint needed = qAllocMore((freePos+1)*fragmentSize, 0);
         Q_ASSERT(needed/fragmentSize > head->allocated);
-        fragments = (Fragment *)realloc(fragments, needed);
+        Fragment *newFragments = (Fragment *)realloc(fragments, needed);
+        Q_CHECK_PTR(newFragments);
+        fragments = newFragments;
         head->allocated = needed/fragmentSize;
         F(freePos).right = 0;
@@ -788 +798 @@
     ~QFragmentMap()
     {
+        if (!data.fragments)
+            return; // in case of out-of-memory, we won't have fragments
         for (Iterator it = begin(); !it.atEnd(); ++it)
             it.value()->free();
@@ -795 +807 @@
         for (Iterator it = begin(); !it.atEnd(); ++it)
             it.value()->free();
-        ::free(data.head);
         data.init();
     }