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In json_object_deep_copy(), copy over _userdata, at least for json_type_string's with the default serializer set, and provide a way for people using custom serializers to provide a custom shallow_copy method.

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This commit is contained in:
Eric Haszlakiewicz
2017-11-29 23:35:38 -05:00
parent 96efeadd6e
commit 5dae561d33
4 changed files with 236 additions and 90 deletions
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33
json_object.h
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@@ -963,6 +963,36 @@ JSON_EXPORT int json_object_set_string_len(json_object* obj, const char* new_val
JSON_EXPORT int json_object_equal(struct json_object *obj1,
struct json_object *obj2);
/**
* Perform a shallow copy of src into *dst as part of an overall json_object_deep_copy().
*
* If src is part of a containing object or array, parent will be non-NULL,
* and key or index will be provided.
* When shallow_copy is called *dst will be NULL, and must be non-NULL when it returns.
* src will never be NULL.
*
* If shallow_copy sets the serializer on an object, return 2 to indicate to
* json_object_deep_copy that it should not attempt to use the standard userdata
* copy function.
*
* @return On success 1 or 2, -1 on errors
*/
typedef int (json_c_shallow_copy_fn)(json_object *src, json_object *parent, const char *key, size_t index, json_object **dst);
/**
* The default shallow copy implementation for use with json_object_deep_copy().
* This simply calls the appropriate json_object_new_<type>() function and
* copies over the serializer function (_to_json_string internal field of
* the json_object structure) but not any _userdata or _user_delete values.
*
* If you're writing a custom shallow_copy function, perhaps because you're using
* your own custom serializer, you can call this first to create the new object
* before customizing it with json_object_set_serializer().
*
* @return 1 on success, -1 on errors, but never 2.
*/
json_c_shallow_copy_fn json_c_shallow_copy_default;
/**
* Copy the contents of the JSON object.
* The destination object must be initialized to NULL,
@@ -979,8 +1009,7 @@ JSON_EXPORT int json_object_equal(struct json_object *obj1,
* or if the destination pointer is non-NULL
*/
extern int json_object_deep_copy(struct json_object *src, struct json_object **dst);
JSON_EXPORT int json_object_deep_copy(struct json_object *src, struct json_object **dst, json_c_shallow_copy_fn shallow_copy);
#ifdef __cplusplus
}
#endif