1 files changed, 24 insertions, 13 deletions

diff --git a/src/corelib/tools/qbytearray.cpp b/src/corelib/tools/qbytearray.cpp
index 803c85e..5d3386e 100644
--- a/src/corelib/tools/qbytearray.cpp
+++ b/src/corelib/tools/qbytearray.cpp
@@ -579,7 +579,7 @@ static inline char qToLower(char c)
         return c;
 }
 
-Q_CORE_EXPORT QByteArray::Data QByteArray::shared_null = {Q_BASIC_ATOMIC_INITIALIZER(1),
+QByteArray::Data QByteArray::shared_null = {Q_BASIC_ATOMIC_INITIALIZER(1),
                                                           0, 0, shared_null.array, {0} };
 QByteArray::Data QByteArray::shared_empty = { Q_BASIC_ATOMIC_INITIALIZER(1),
                                               0, 0, shared_empty.array, {0} };
@@ -1304,6 +1304,21 @@ QByteArray::QByteArray(int size, char ch)
 }
 
 /*!
+    \internal 
+
+    Constructs a byte array of size \a size with uninitialized contents.
+*/
+
+QByteArray::QByteArray(int size, Qt::Initialization)
+{
+    d = static_cast<Data *>(qMalloc(sizeof(Data)+size));
+    d->ref = 1;
+    d->alloc = d->size = size;
+    d->data = d->array;
+    d->array[size] = '\0';
+}
+
+/*!
     Sets the size of the byte array to \a size bytes.
 
     If \a size is greater than the current size, the byte array is
@@ -2591,6 +2606,8 @@ void QByteArray::clear()
     d->ref.ref();
 }
 
+#ifndef QT_NO_DATASTREAM
+
 /*! \relates QByteArray
 
     Writes byte array \a ba to the stream \a out and returns a reference
@@ -2598,7 +2615,6 @@ void QByteArray::clear()
 
     \sa {Format of the QDataStream operators}
 */
-#ifndef QT_NO_DATASTREAM
 
 QDataStream &operator<<(QDataStream &out, const QByteArray &ba)
 {
@@ -2641,7 +2657,7 @@ QDataStream &operator>>(QDataStream &in, QByteArray &ba)
 
     return in;
 }
-#endif //QT_NO_DATASTREAM
+#endif // QT_NO_DATASTREAM
 
 /*! \fn bool QByteArray::operator==(const QString &str) const
 
@@ -2976,8 +2992,7 @@ QByteArray QByteArray::simplified() const
 {
     if (d->size == 0)
         return *this;
-    QByteArray result;
-    result.resize(d->size);
+    QByteArray result(d->size, Qt::Uninitialized);
     const char *from = d->data;
     const char *fromend = from + d->size;
     int outc=0;
@@ -3428,8 +3443,7 @@ QByteArray QByteArray::toBase64() const
     const char padchar = '=';
     int padlen = 0;
 
-    QByteArray tmp;
-    tmp.resize(((d->size * 4) / 3) + 3);
+    QByteArray tmp((d->size * 4) / 3 + 3, Qt::Uninitialized);
 
     int i = 0;
     char *out = tmp.data();
@@ -3767,8 +3781,7 @@ QByteArray QByteArray::fromBase64(const QByteArray &base64)
 {
     unsigned int buf = 0;
     int nbits = 0;
-    QByteArray tmp;
-    tmp.resize((base64.size() * 3) / 4);
+    QByteArray tmp((base64.size() * 3) / 4, Qt::Uninitialized);
 
     int offset = 0;
     for (int i = 0; i < base64.size(); ++i) {
@@ -3816,8 +3829,7 @@ QByteArray QByteArray::fromBase64(const QByteArray &base64)
 */
 QByteArray QByteArray::fromHex(const QByteArray &hexEncoded)
 {
-    QByteArray res;
-    res.resize((hexEncoded.size() + 1)/ 2);
+    QByteArray res((hexEncoded.size() + 1)/ 2, Qt::Uninitialized);
     uchar *result = (uchar *)res.data() + res.size();
 
     bool odd_digit = true;
@@ -3854,8 +3866,7 @@ QByteArray QByteArray::fromHex(const QByteArray &hexEncoded)
 */
 QByteArray QByteArray::toHex() const
 {
-    QByteArray hex;
-    hex.resize(d->size*2);
+    QByteArray hex(d->size * 2, Qt::Uninitialized);
     char *hexData = hex.data();
     const uchar *data = (const uchar *)d->data;
     for (int i = 0; i < d->size; ++i) {