--- /dev/null
+/*
+ * Copyright 2017 Google
+ *
+ * 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.
+ */
+
+#ifndef FIRMessaging_xcodeproj_FIRMessagingDefines_h
+#define FIRMessaging_xcodeproj_FIRMessagingDefines_h
+
+#define _FIRMessaging_VERBOSE_LOGGING 1
+
+// Verbose Logging
+#if (_FIRMessaging_VERBOSE_LOGGING)
+#define FIRMessaging_DEV_VERBOSE_LOG(...) NSLog(__VA_ARGS__)
+#else
+#define FIRMessaging_DEV_VERBOSE_LOG(...) do { } while (0)
+#endif // FIRMessaging_VERBOSE_LOGGING
+
+
+// WEAKIFY & STRONGIFY
+// Helper macro.
+#define _FIRMessaging_WEAKNAME(VAR) VAR ## _weak_
+
+#define FIRMessaging_WEAKIFY(VAR) __weak __typeof__(VAR) _FIRMessaging_WEAKNAME(VAR) = (VAR);
+
+#define FIRMessaging_STRONGIFY(VAR) \
+_Pragma("clang diagnostic push") \
+_Pragma("clang diagnostic ignored \"-Wshadow\"") \
+__strong __typeof__(VAR) VAR = _FIRMessaging_WEAKNAME(VAR); \
+_Pragma("clang diagnostic pop")
+
+
+// Type Conversions (used for NSInteger etc)
+#ifndef _FIRMessaging_L
+#define _FIRMessaging_L(v) (long)(v)
+#endif
+
+#ifndef _FIRMessaging_UL
+#define _FIRMessaging_UL(v) (unsigned long)(v)
+#endif
+
+#endif
+
+// Debug Assert
+#ifndef _FIRMessagingDevAssert
+// we directly invoke the NSAssert handler so we can pass on the varargs
+// (NSAssert doesn't have a macro we can use that takes varargs)
+#if !defined(NS_BLOCK_ASSERTIONS)
+#define _FIRMessagingDevAssert(condition, ...) \
+ do { \
+ if (!(condition)) { \
+ [[NSAssertionHandler currentHandler] \
+ handleFailureInFunction:(NSString *) \
+ [NSString stringWithUTF8String:__PRETTY_FUNCTION__] \
+ file:(NSString *)[NSString stringWithUTF8String:__FILE__] \
+ lineNumber:__LINE__ \
+ description:__VA_ARGS__]; \
+ } \
+ } while(0)
+#else // !defined(NS_BLOCK_ASSERTIONS)
+#define _FIRMessagingDevAssert(condition, ...) do { } while (0)
+#endif // !defined(NS_BLOCK_ASSERTIONS)
+
+#endif // _FIRMessagingDevAssert
+
+// Invalidates the initializer from which it's called.
+#ifndef FIRMessagingInvalidateInitializer
+#define FIRMessagingInvalidateInitializer() \
+ do { \
+ [self class]; /* Avoid warning of dead store to |self|. */ \
+ _FIRMessagingDevAssert(NO, @"Invalid initializer."); \
+ return nil; \
+ } while (0)
+#endif