use platform-specific NSString for case changes on OS X/iOS

refs #309

1 files changed, 6 insertions, 0 deletions

diff --git a/include/mbgl/platform/platform.hpp b/include/mbgl/platform/platform.hpp
index 43c6ce4f5e..22405a4cfd 100644
--- a/include/mbgl/platform/platform.hpp
+++ b/include/mbgl/platform/platform.hpp
@@ -28,6 +28,12 @@ std::shared_ptr<Request> request_http(const std::string &url,
                                       std::function<void(Response *)> callback,
                                       std::shared_ptr<uv::loop> loop = nullptr);
 
+// Uppercase a string, potentially using platform-specific routines.
+std::string uppercase(const std::string &string);
+
+// Lowercase a string, potentially using platform-specific routines.
+std::string lowercase(const std::string &string);
+
 // Cancels an HTTP request.
 void cancel_request_http(const std::shared_ptr<Request> &req);