1 files changed, 85 insertions, 0 deletions
diff --git a/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp b/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp
new file mode 100644
index 000000000..6b66276b7
--- /dev/null
+++ b/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp
@@ -0,0 +1,85 @@
+void wrapInFunction()
+{
+
+//! [0]
+file = QFile("file.dat")
+file.open(QIODevice.WriteOnly)
+# we will serialize the data into the file
+out = QDataStream(file)
+# serialize a string
+out << "the answer is"    
+# serialize an integer
+out.writeInt32(42)
+//! [0]
+
+
+//! [1]
+file = QFile("file.dat")
+file.open(QIODevice.ReadOnly)
+# read the data serialized from the file
+i = QDataStream(file)
+str = QString()
+a = 0
+# extract "the answer is" and 42
+i >> str
+a = i.readInt32()                  
+//! [1]
+
+
+//! [2]
+stream.setVersion(QDataStream.Qt_4_0)
+//! [2]
+
+
+//! [3]
+file = QFile("file.xxx")
+file.open(QIODevice.WriteOnly)
+out = QDataStream(file)
+
+# Write a header with a "magic number" and a version
+out.writeInt32(0xA0B0C0D0)
+out.writeInt32(123)
+
+out.setVersion(QDataStream.Qt_4_0);
+
+// Write the data
+out << lots_of_interesting_data
+//! [3]
+
+
+//! [4]
+file = QFile("file.xxx")
+file.open(QIODevice.ReadOnly)
+i = QDataStream(file)
+
+// Read and check the header
+magic = i.readInt32()
+if magic != 0xA0B0C0D0:
+    return XXX_BAD_FILE_FORMAT
+
+// Read the version
+version = i.readInt32()
+if version < 100:
+    return XXX_BAD_FILE_TOO_OLD
+if version > 123:
+    return XXX_BAD_FILE_TOO_NEW
+
+if version <= 110:
+    in.setVersion(QDataStream.Qt_3_2)
+else:
+    in.setVersion(QDataStream.Qt_4_0)
+
+// Read the data
+in >> lots_of_interesting_data
+if version >= 120:
+    in >> data_new_in_XXX_version_1_2
+in >> other_interesting_data
+//! [4]
+
+
+//! [5]
+out = QDataStream(file)
+out.setVersion(QDataStream.Qt_4_0)
+//! [5]
+
+}