Introduce std::string conversion to QByteArray

Add conversion methods similar to those in QString to QByteArray. This
is often more useful than the QString version since std::string like
QByteArray are byte arrays.

[ChangeLog][QtCore][QByteArray] Added convenience methods to convert
directly to and from std::string.

Change-Id: I92c29d4bb1d9e06a667dd9cdd936970e2d272006
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qbytearray/tst_qbytearray.cpp b/tests/auto/corelib/tools/qbytearray/tst_qbytearray.cpp
index cdcbd19ae8..8fac232962 100644
--- a/tests/auto/corelib/tools/qbytearray/tst_qbytearray.cpp
+++ b/tests/auto/corelib/tools/qbytearray/tst_qbytearray.cpp
@@ -153,6 +153,8 @@ private slots:
 #endif
 
     void macTypes();
+
+    void stdString();
 };
 
 static const struct StaticByteArrays {
@@ -2007,6 +2009,23 @@ void tst_QByteArray::macTypes()
 #endif
 }
 
+void tst_QByteArray::stdString()
+{
+    std::string stdstr( "QByteArray" );
+
+    const QByteArray stlqt = QByteArray::fromStdString(stdstr);
+    QCOMPARE(stlqt.length(), int(stdstr.length()));
+    QCOMPARE(stlqt.data(), stdstr.c_str());
+    QCOMPARE(stlqt.toStdString(), stdstr);
+
+    std::string utf8str( "Nøt æscii" );
+    const QByteArray u8 = QByteArray::fromStdString(utf8str);
+    const QByteArray l1 = QString::fromUtf8(u8).toLatin1();
+    std::string l1str = l1.toStdString();
+    QVERIFY(l1str.length() < utf8str.length());
+}
+
+
 const char globalChar = '1';
 
 QTEST_MAIN(tst_QByteArray)