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WebDriverAgentLib/Utilities/FBMacros.h

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+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+// Typedef to help with storing constant strings for enums.
+#if __has_feature(objc_arc)
+    typedef __unsafe_unretained NSString* FBLiteralString;
+#else
+    typedef NSString* FBLiteralString;
+#endif
+
+/*! Returns 'value' or nil if 'value' is an empty string */
+#define FBTransferEmptyStringToNil(value) ([value isEqual:@""] ? nil : value)
+
+/*! Returns 'value1' or 'value2' if 'value1' is an empty string */
+#define FBFirstNonEmptyValue(value1, value2) ^{ \
+  id value1computed = value1; \
+  return (value1computed == nil || [value1computed isEqual:@""] ? value2 : value1computed); \
+}()
+
+/*! Returns 'value' or NSNull if 'value' is nil */
+#define FBValueOrNull(value) ((value) ?: [NSNull null])
+
+/*!
+  Returns name of class property as a string
+  previously used [class new] errors out on certain classes because new will be declared unavailable
+  Instead we are casting into a class to get compiler support with property name.
+*/
+#define FBStringify(class, property) ({if(NO){[((class *)nil) property];} @#property;})
+
+/*! Creates weak type for given 'arg' */
+#define FBWeakify(arg) typeof(arg) __weak wda_weak_##arg = arg
+
+/*! Creates strong type for FBWeakify-ed 'arg' */
+#define FBStrongify(arg) \
+  _Pragma("clang diagnostic push") \
+  _Pragma("clang diagnostic ignored \"-Wshadow\"") \
+  typeof(arg) arg = wda_weak_##arg \
+  _Pragma("clang diagnostic pop")
+
+/*! Returns YES if current system version satisfies the given codition */
+#define SYSTEM_VERSION_EQUAL_TO(v)                  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
+#define SYSTEM_VERSION_GREATER_THAN(v)              ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)
+#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
+#define SYSTEM_VERSION_LESS_THAN(v)                 ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
+#define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v)     ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)
+
+/*! Converts the given number of milliseconds into seconds */
+#define FBMillisToSeconds(ms) ((ms) / 1000.0)
+
+/*! Converts boolean value to its string representation */
+#define FBBoolToString(b) ((b) ? @"true" : @"false")
+