Add includes and split off json_types.h to help ensure that headers can be included in any order.

json_types.h

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2020 Eric Hawicz
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ */
+
+#ifndef _json_types_h_
+#define _json_types_h_
+
+/**
+ * @file
+ * @brief Basic types used in a few places in json-c, but you should include "json_object.h" instead.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef JSON_EXPORT
+#if defined(_MSC_VER)
+#define JSON_EXPORT __declspec(dllexport)
+#else
+#define JSON_EXPORT extern
+#endif
+#endif
+
+struct printbuf;
+
+/**
+ * A structure to use with json_object_object_foreachC() loops.
+ * Contains key, val and entry members.
+ */
+struct json_object_iter
+{
+	char *key;
+	struct json_object *val;
+	struct lh_entry *entry;
+};
+typedef struct json_object_iter json_object_iter;
+
+typedef int json_bool;
+
+/**
+ * @brief The core type for all type of JSON objects handled by json-c
+ */
+typedef struct json_object json_object;
+
+/**
+ * Type of custom user delete functions.  See json_object_set_serializer.
+ */
+typedef void(json_object_delete_fn)(struct json_object *jso, void *userdata);
+
+/**
+ * Type of a custom serialization function.  See json_object_set_serializer.
+ */
+typedef int(json_object_to_json_string_fn)(struct json_object *jso, struct printbuf *pb, int level,
+                                           int flags);
+
+/* supported object types */
+
+typedef enum json_type
+{
+	/* If you change this, be sure to update json_type_to_name() too */
+	json_type_null,
+	json_type_boolean,
+	json_type_double,
+	json_type_int,
+	json_type_object,
+	json_type_array,
+	json_type_string
+} json_type;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif