create appendCopy method in OUStringBuffer

so we can avoid temporary copies when appending a substring of an
OUString to the buffer. I would have preferred to call the method just
"append" but that results in ambiguous method errors when the callsite
is something like
   sal_Int32 n;
   OUStringBuffer s;
   s.append(n, 10);
I'm not sure why

Change-Id: I6b5b6641fcb5b26ce2269f89ef06e03c0b6aa76f
Reviewed-on: https://gerrit.libreoffice.org/58666
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/opencl/source/openclconfig.cxx b/opencl/source/openclconfig.cxx
index 18a9f865be00..7517cf3fecdf 100644
--- a/opencl/source/openclconfig.cxx
+++ b/opencl/source/openclconfig.cxx
@@ -76,7 +76,7 @@ OUString getToken(const OUString& string, sal_Int32& index)
     while ((p = token.indexOf('%', i)) >= 0)
     {
         if (p > i)
-            result.append(token.copy(i, p - i));
+            result.appendCopy(token, i, p - i);
         if (p < token.getLength() - 2)
         {
             result.append(OUStringLiteral1(token.copy(p+1, 2).toInt32(16)));
@@ -87,7 +87,7 @@ OUString getToken(const OUString& string, sal_Int32& index)
             i = token.getLength();
         }
     }
-    result.append(token.copy(i));
+    result.appendCopy(token,i);
 
     return result.makeStringAndClear();
 }