1 files changed, 99 insertions, 0 deletions
diff --git a/contrib/ccan/json/json.h b/contrib/ccan/json/json.h
new file mode 100644
index 0000000..6eef48a
--- /dev/null
+++ b/contrib/ccan/json/json.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: MIT
+ * Source: https://ccodearchive.net/info/json.html
+ * Copyright (C) 2011 Joseph A. Adams (joeyadams3.14159@gmail.com) */
+
+#ifndef CCAN_JSON_H
+#define CCAN_JSON_H
+
+#include <lib/defines.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef enum {
+	JSON_NULL,
+	JSON_BOOL,
+	JSON_STRING,
+	JSON_NUMBER,
+	JSON_ARRAY,
+	JSON_OBJECT,
+} JsonTag;
+
+typedef struct JsonNode JsonNode;
+
+struct JsonNode
+{
+	/* only if parent is an object or array (NULL otherwise) */
+	JsonNode *parent;
+	JsonNode *prev, *next;
+	
+	/* only if parent is an object (NULL otherwise) */
+	char *key; /* Must be valid UTF-8. */
+	
+	JsonTag tag;
+	union {
+		/* JSON_BOOL */
+		bool bool_;
+		
+		/* JSON_STRING */
+		char *string_; /* Must be valid UTF-8. */
+		
+		/* JSON_NUMBER */
+		double number_;
+		
+		/* JSON_ARRAY */
+		/* JSON_OBJECT */
+		struct {
+			JsonNode *head, *tail;
+		} children;
+	};
+};
+
+/*** Encoding, decoding, and validation ***/
+
+KR_EXPORT JsonNode   *json_decode         (const char *json);
+KR_EXPORT char       *json_encode         (const JsonNode *node);
+KR_EXPORT char       *json_encode_string  (const char *str);
+KR_EXPORT char       *json_stringify      (const JsonNode *node, const char *space);
+KR_EXPORT void        json_delete         (JsonNode *node);
+
+KR_EXPORT bool        json_validate       (const char *json);
+
+/*** Lookup and traversal ***/
+
+KR_EXPORT JsonNode   *json_find_element   (JsonNode *array, int index);
+KR_EXPORT JsonNode   *json_find_member    (JsonNode *object, const char *key);
+
+KR_EXPORT JsonNode   *json_first_child    (const JsonNode *node);
+
+#define json_foreach(i, object_or_array)            \
+	for ((i) = json_first_child(object_or_array);   \
+		 (i) != NULL;                               \
+		 (i) = (i)->next)
+
+/*** Construction and manipulation ***/
+
+KR_EXPORT JsonNode *json_mknull(void);
+KR_EXPORT JsonNode *json_mkbool(bool b);
+KR_EXPORT JsonNode *json_mkstring(const char *s);
+KR_EXPORT JsonNode *json_mknumber(double n);
+KR_EXPORT JsonNode *json_mkarray(void);
+KR_EXPORT JsonNode *json_mkobject(void);
+
+KR_EXPORT void json_append_element(JsonNode *array, JsonNode *element);
+KR_EXPORT void json_prepend_element(JsonNode *array, JsonNode *element);
+KR_EXPORT void json_append_member(JsonNode *object, const char *key, JsonNode *value);
+KR_EXPORT void json_prepend_member(JsonNode *object, const char *key, JsonNode *value);
+
+KR_EXPORT void json_remove_from_parent(JsonNode *node);
+
+/*** Debugging ***/
+
+/*
+ * Look for structure and encoding problems in a JsonNode or its descendents.
+ *
+ * If a problem is detected, return false, writing a description of the problem
+ * to errmsg (unless errmsg is NULL).
+ */
+KR_EXPORT bool json_check(const JsonNode *node, char errmsg[256]);
+
+#endif