--- /dev/null
+++ dyld/dyld-1340/common/JSONReader.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2017 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+
+#ifndef __JSON_READER_H__
+#define __JSON_READER_H__
+
+#include "JSON.h"
+
+class Diagnostics;
+
+namespace json {
+
+Node readJSON(Diagnostics& diags, const char* filePath, bool useJSON5);
+Node readJSON(Diagnostics& diags, const void* contents, size_t length, bool useJSON5);
+
+// Given a map node, returns the node representing the given value.
+// If it is missing, returns a sentinel node and sets an error on the diagnostic
+const Node& getRequiredValue(Diagnostics& diags, const Node& node, const char* key);
+
+// Given a map node, returns the node representing the given value.
+// If it is missing, return nullptr.
+const Node* getOptionalValue(Diagnostics& diags, const Node& node, const char* key);
+
+// Parses an int from the given node, or throws an error if its not an integer payload
+uint64_t parseRequiredInt(Diagnostics& diags, const Node& node);
+
+// Parses a bool from the given node, or throws an error if its not a boolean payload
+bool parseRequiredBool(Diagnostics& diags, const Node& node);
+
+// Parses a string from the given node, or throws an error if its not a string payload
+const std::string& parseRequiredString(Diagnostics& diags, const Node& node);
+
+
+} // namespace json
+
+
+#endif // __JSON_READER_H__