1 files changed, 45 insertions, 0 deletions
diff --git a/Firebase/Database/FImmutableSortedDictionary/FImmutableSortedDictionary/FLLRBNode.h b/Firebase/Database/FImmutableSortedDictionary/FImmutableSortedDictionary/FLLRBNode.h
new file mode 100644
index 0000000..2634494
--- /dev/null
+++ b/Firebase/Database/FImmutableSortedDictionary/FImmutableSortedDictionary/FLLRBNode.h
@@ -0,0 +1,45 @@
+/*
+ * 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.
+ */
+
+#import <Foundation/Foundation.h>
+
+#define RED @true
+#define BLACK @false
+
+typedef NSNumber FLLRBColor;
+
+@protocol FLLRBNode <NSObject>
+
+- (id)copyWith:(id) aKey withValue:(id) aValue withColor:(FLLRBColor*) aColor withLeft:(id<FLLRBNode>)aLeft withRight:(id<FLLRBNode>)aRight;
+- (id<FLLRBNode>) insertKey:(id) aKey forValue:(id)aValue withComparator:(NSComparator)aComparator;
+- (id<FLLRBNode>) remove:(id) key withComparator:(NSComparator)aComparator;
+- (int) count;
+- (BOOL) isEmpty;
+- (BOOL) inorderTraversal:(BOOL (^)(id key, id value))action;
+- (BOOL) reverseTraversal:(BOOL (^)(id key, id value))action;
+- (id<FLLRBNode>) min;
+- (id) minKey;
+- (id) maxKey;
+- (BOOL) isRed;
+- (int) check;
+
+@property (nonatomic, strong) id key;
+@property (nonatomic, strong) id value;
+@property (nonatomic, strong) FLLRBColor* color;
+@property (nonatomic, strong) id<FLLRBNode> left;
+@property (nonatomic, strong) id<FLLRBNode> right;
+
+@end