support for fast string operator+ in operator+=/append

Not much point in building a string instance that will be copied elsewhere immediatelly.

Change-Id: I38b7d3696f2c619e6424eb3959b00cd2c7738c47

1 files changed, 19 insertions, 0 deletions

diff --git a/sal/inc/rtl/strbuf.hxx b/sal/inc/rtl/strbuf.hxx
index 77e588fe3cd3..286a862d032b 100644
--- a/sal/inc/rtl/strbuf.hxx
+++ b/sal/inc/rtl/strbuf.hxx
@@ -496,6 +496,25 @@ public:
         return *this;
     }
 
+#ifdef RTL_FAST_STRING
+    /**
+     @overload
+     @internal
+    */
+    template< typename T1, typename T2 >
+    OStringBuffer& append( const OStringConcat< T1, T2 >& c )
+    {
+        const int l = c.length();
+        if( l == 0 )
+            return *this;
+        rtl_stringbuffer_ensureCapacity( &pData, &nCapacity, pData->length + l );
+        char* end = c.addData( pData->buffer + pData->length );
+        *end = '\0';
+        pData->length = end - pData->buffer;
+        return *this;
+    }
+#endif
+
     /**
         Appends the string representation of the <code>sal_Bool</code>
         argument to the string buffer.