Changeset 846 for trunk/src/gui/painting/qdatabuffer_p.h

Timestamp:

May 5, 2011, 5:36:53 AM (14 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/gui/painting/qdatabuffer_p.h (modified) (7 diffs)

trunk/src/gui/painting/qdatabuffer_p.h

@@ -1 +1 @@
 /****************************************************************************
 **
-** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
@@ -61 +61 @@
 {
 public:
-    QDataBuffer(int res = 64)
+    QDataBuffer(int res)
     {
         capacity = res;
-        buffer = (Type*) qMalloc(capacity * sizeof(Type));
+        if (res)
+            buffer = (Type*) qMalloc(capacity * sizeof(Type));
+        else
+            buffer = 0;
         siz = 0;
     }
@@ -70 +73 @@
     ~QDataBuffer()
     {
-        qFree(buffer);
+        if (buffer)
+            qFree(buffer);
     }
 
@@ -82 +86 @@
     inline Type &at(int i) { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; }
     inline const Type &at(int i) const { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; }
+    inline Type &last() { Q_ASSERT(!isEmpty()); return buffer[siz-1]; }
     inline const Type &last() const { Q_ASSERT(!isEmpty()); return buffer[siz-1]; }
+    inline Type &first() { Q_ASSERT(!isEmpty()); return buffer[0]; }
     inline const Type &first() const { Q_ASSERT(!isEmpty()); return buffer[0]; }
 
@@ -89 +95 @@
         buffer[siz] = t;
         ++siz;
+    }
+
+    inline void pop_back() {
+        Q_ASSERT(siz > 0);
+        --siz;
     }
 
@@ -98 +109 @@
     inline void reserve(int size) {
         if (size > capacity) {
+            if (capacity == 0)
+                capacity = 1;
             while (capacity < size)
                 capacity *= 2;
@@ -106 +119 @@
     inline void shrink(int size) {
         capacity = size;
-        buffer = (Type*) qRealloc(buffer, capacity * sizeof(Type));
+        if (size)
+            buffer = (Type*) qRealloc(buffer, capacity * sizeof(Type));
+        else {
+            qFree(buffer);
+            buffer = 0;
+        }
     }