QStringBuilder: Add support for QByteArrayView

[ChangeLog][QtCore][QStringBuilder] Added support for QByteArrayView.

Change-Id: If2c23549d533dd31c320f3ee455fcd01ea5b460a
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/corelib/text/qstringbuilder.h b/src/corelib/text/qstringbuilder.h
index 8494459d63..f3cbba26dd 100644
--- a/src/corelib/text/qstringbuilder.h
+++ b/src/corelib/text/qstringbuilder.h
@@ -187,6 +187,27 @@ template <> struct QConcatenable<char> : private QAbstractConcatenable
     { *out++ = c; }
 };
 
+template <> struct QConcatenable<QByteArrayView> : private QAbstractConcatenable
+{
+    typedef QByteArrayView type;
+    typedef QByteArray ConvertTo;
+    enum { ExactSize = true };
+    static qsizetype size(QByteArrayView bav) { return bav.size(); }
+#ifndef QT_NO_CAST_FROM_ASCII
+    QT_ASCII_CAST_WARN static inline void appendTo(QByteArrayView bav, QChar *&out)
+    {
+        QAbstractConcatenable::convertFromUtf8(bav, out);
+    }
+#endif
+    static inline void appendTo(QByteArrayView bav, char *&out)
+    {
+        qsizetype n = bav.size();
+        if (n)
+            memcpy(out, bav.data(), n);
+        out += n;
+    }
+};
+
 template <> struct QConcatenable<char16_t> : private QAbstractConcatenable
 {
     typedef char16_t type;