OLMKit: Use the same version as libolm

xcode/OLMKit/OLMKit.h

@@ -8,15 +8,11 @@
 
 #import <UIKit/UIKit.h>
 
-//! Project version number for OLMKit.
-FOUNDATION_EXPORT double OLMKitVersionNumber;
-
-//! Project version string for OLMKit.
-FOUNDATION_EXPORT const unsigned char OLMKitVersionString[];
+//! Project version string for OLMKit, the same as libolm.
+NSString *OLMKitVersionString();
 
 // In this header, you should import all the public headers of your framework using statements like #import <OLMKit/PublicHeader.h>
 
-
 #import <OLMKit/OLMAccount.h>
 #import <OLMKit/OLMSession.h>
 #import <OLMKit/OLMMessage.h>

xcode/OLMKit/OLMKit.m

+/*
+ Copyright 2016 OpenMarket Ltd
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#import "OLMKit.h"
+
+#include "olm/olm.h"
+
+NSString *OLMKitVersionString()
+{
+    uint8_t major, minor, patch;
+
+    olm_get_library_version(&major, &minor, &patch);
+
+    return [NSString stringWithFormat:@"%tu.%tu.%tu", major, minor, patch];
+}