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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:26:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:26:00 +0000
commit830407e88f9d40d954356c3754f2647f91d5c06a (patch)
treed6a0ece6feea91f3c656166dbaa884ef8a29740e /contrib/ccan/json/json.h
parentInitial commit. (diff)
downloadknot-resolver-830407e88f9d40d954356c3754f2647f91d5c06a.tar.xz
knot-resolver-830407e88f9d40d954356c3754f2647f91d5c06a.zip
Adding upstream version 5.6.0.upstream/5.6.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'contrib/ccan/json/json.h')
-rw-r--r--contrib/ccan/json/json.h99
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
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+++ b/contrib/ccan/json/json.h
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+/* 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