Edit: /usr/include/json-c/json_visit.h (3181B)
#ifndef _json_c_json_visit_h_
#define _json_c_json_visit_h_
/**
* @file
* @brief Methods for walking a tree of objects.
*/
#include "json_object.h"
typedef int (json_c_visit_userfunc)(json_object *jso, int flags,
json_object *parent_jso, const char *jso_key,
size_t *jso_index, void *userarg);
/**
* Visit each object in the JSON hierarchy starting at jso.
* For each object, userfunc is called, passing the object and userarg.
* If the object has a parent (i.e. anything other than jso itself)
* its parent will be passed as parent_jso, and either jso_key or jso_index
* will be set, depending on whether the parent is an object or an array.
*
* Nodes will be visited depth first, but containers (arrays and objects)
* will be visited twice, the second time with JSON_C_VISIT_SECOND set in
* flags.
*
* userfunc must return one of the defined return values, to indicate
* whether and how to continue visiting nodes, or one of various ways to stop.
*
* Returns 0 if nodes were visited successfully, even if some were
* intentionally skipped due to what userfunc returned.
* Returns <0 if an error occurred during iteration, including if
* userfunc returned JSON_C_VISIT_RETURN_ERROR.
*/
int json_c_visit(json_object *jso, int future_flags,
json_c_visit_userfunc *userfunc, void *userarg);
/**
* Passed to json_c_visit_userfunc as one of the flags values to indicate
* that this is the second time a container (array or object) is being
* called, after all of it's members have been iterated over.
*/
#define JSON_C_VISIT_SECOND 0x02
/**
* This json_c_visit_userfunc return value indicates that iteration
* should proceed normally.
*/
#define JSON_C_VISIT_RETURN_CONTINUE 0
/**
* This json_c_visit_userfunc return value indicates that iteration
* over the members of the current object should be skipped.
* If the current object isn't a container (array or object), this
* is no different than JSON_C_VISIT_RETURN_CONTINUE.
*/
#define JSON_C_VISIT_RETURN_SKIP 7547
/**
* This json_c_visit_userfunc return value indicates that iteration
* of the fields/elements of the
containing object should stop
* and continue "popped up" a level of the object hierarchy.
* For example, returning this when handling arg will result in
* arg3 and any other fields being skipped. The next call to userfunc
* will be the JSON_C_VISIT_SECOND call on "foo", followed by a userfunc
* call on "bar".
*
* {
* "foo": {
* "arg1": 1,
* "arg2": 2,
* "arg3": 3,
* ...
* },
* "bar": {
* ...
* }
* }
*
*/
#define JSON_C_VISIT_RETURN_POP 767
/**
* This json_c_visit_userfunc return value indicates that iteration
* should stop immediately, and cause json_c_visit to return success.
*/
#define JSON_C_VISIT_RETURN_STOP 7867
/**
* This json_c_visit_userfunc return value indicates that iteration
* should stop immediately, and cause json_c_visit to return an error.
*/
#define JSON_C_VISIT_RETURN_ERROR -1
#endif /* _json_c_json_visit_h_ */