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#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 <b>containing</b> 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". * <pre> * { * "foo": { * "arg1": 1, * "arg2": 2, * "arg3": 3, * ... * }, * "bar": { * ... * } * } * </pre> */ #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_ */
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arraylist.h
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