1 files changed, 80 insertions, 0 deletions
diff --git a/src/libnetdata/json/json.h b/src/libnetdata/json/json.h
new file mode 100644
index 00000000..5c3459ed
--- /dev/null
+++ b/src/libnetdata/json/json.h
@@ -0,0 +1,80 @@
+#ifndef CHECKIN_JSON_H
+#define CHECKIN_JSON_H 1
+
+#if ENABLE_JSONC
+#include <json-c/json.h>
+// fix an older json-c bug
+// https://github.com/json-c/json-c/issues/135
+#ifdef error_description
+#undef error_description
+#endif // error_description
+#endif // ENABLE_JSONC
+
+#include "jsmn.h"
+
+//https://www.ibm.com/support/knowledgecenter/en/SS9H2Y_7.6.0/com.ibm.dp.doc/json_parserlimits.html
+#define JSON_NAME_LEN 256
+#define JSON_FULLNAME_LEN 1024
+
+typedef enum {
+    JSON_OBJECT = 0,
+    JSON_ARRAY = 1,
+    JSON_STRING = 2,
+    JSON_NUMBER = 3,
+    JSON_BOOLEAN = 4,
+    JSON_NULL = 5,
+} JSON_ENTRY_TYPE;
+
+typedef struct json_entry {
+    JSON_ENTRY_TYPE type;
+    char name[JSON_NAME_LEN + 1];
+    char fullname[JSON_FULLNAME_LEN + 1];
+    union {
+        char *string;           // type == JSON_STRING
+        NETDATA_DOUBLE number;  // type == JSON_NUMBER
+        int boolean;            // type == JSON_BOOLEAN
+        size_t items;           // type == JSON_ARRAY
+    } data;
+    size_t pos;                 // the position of this item in its parent
+
+    char *original_string;
+
+    void *callback_data;
+    int (*callback_function)(struct json_entry *);
+} JSON_ENTRY;
+
+// ----------------------------------------------------------------------------
+// public functions
+
+#define JSON_OK 				0
+#define JSON_CANNOT_DOWNLOAD 	1
+#define JSON_CANNOT_PARSE		2
+
+int json_parse(char *js, void *callback_data, int (*callback_function)(JSON_ENTRY *));
+
+
+// ----------------------------------------------------------------------------
+// private functions
+
+#ifdef ENABLE_JSONC
+json_object *json_tokenise(char *js);
+size_t json_walk(json_object *t, void *callback_data, int (*callback_function)(struct json_entry *));
+#else
+jsmntok_t *json_tokenise(char *js, size_t len, size_t *count);
+size_t json_walk_tree(char *js, jsmntok_t *t, void *callback_data, int (*callback_function)(struct json_entry *));
+#endif
+
+size_t json_walk_object(char *js, jsmntok_t *t, size_t nest, size_t start, JSON_ENTRY *e);
+size_t json_walk_array(char *js, jsmntok_t *t, size_t nest, size_t start, JSON_ENTRY *e);
+size_t json_walk_string(char *js, jsmntok_t *t, size_t start, JSON_ENTRY *e);
+size_t json_walk_primitive(char *js, jsmntok_t *t, size_t start, JSON_ENTRY *e);
+
+int json_callback_print(JSON_ENTRY *e);
+
+static inline void cleanup_json_object_pp(struct json_object **jobj) {
+    if(*jobj)
+        json_object_put(*jobj);
+}
+#define CLEAN_JSON_OBJECT _cleanup_(cleanup_json_object_pp) struct json_object
+
+#endif // CHECKIN_JSON_H