Simplify QDataStream::skipRawData()

... by using the new QIODevice::skip() function.

Change-Id: I943c4feb896d677f3150da542950595d7f485e75
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/io/qdatastream.cpp

@@ -1385,32 +1385,13 @@ int QDataStream::writeRawData(const char *s, int len)
 int QDataStream::skipRawData(int len)
 {
     CHECK_STREAM_PRECOND(-1)
-
+    if (q_status != Ok && dev->isTransactionStarted())
-    if (dev->isSequential()) {
-        char buf[4096];
-        int sumRead = 0;
-
-        while (len > 0) {
-            int blockSize = qMin(len, (int)sizeof(buf));
-            int n = readBlock(buf, blockSize);
-            if (n == -1)
         return -1;
-            if (n == 0)
-                return sumRead;
 
-            sumRead += n;
+    const int skipResult = dev->skip(len);
-            len -= blockSize;
+    if (skipResult != len)
-        }
+        setStatus(ReadPastEnd);
-        return sumRead;
+    return skipResult;
-    } else {
-        qint64 pos = dev->pos();
-        qint64 size = dev->size();
-        if (pos + len > size)
-            len = size - pos;
-        if (!dev->seek(pos + len))
-            return -1;
-        return len;
-    }
 }
 
 QT_END_NAMESPACE