#include <assert.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "json.h"
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#include "json_tokener.h"
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#include "json_visit.h"
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static json_c_visit_userfunc emit_object;
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static json_c_visit_userfunc skip_arrays;
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static json_c_visit_userfunc pop_and_stop;
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static json_c_visit_userfunc err_on_subobj2;
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static json_c_visit_userfunc pop_array;
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static json_c_visit_userfunc stop_array;
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static json_c_visit_userfunc err_return;
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int main(void)
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{
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MC_SET_DEBUG(1);
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const char *input = "{\
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\"obj1\": 123,\
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\"obj2\": {\
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\"subobj1\": \"aaa\",\
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\"subobj2\": \"bbb\",\
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\"subobj3\": [ \"elem1\", \"elem2\", true ],\
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},\
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\"obj3\": 1.234,\
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\"obj4\": [ true, false, null ]\
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}";
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json_object *jso = json_tokener_parse(input);
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printf("jso.to_string()=%s\n", json_object_to_json_string(jso));
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int rv;
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rv = json_c_visit(jso, 0, emit_object, NULL);
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printf("json_c_visit(emit_object)=%d\n", rv);
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printf("================================\n\n");
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rv = json_c_visit(jso, 0, skip_arrays, NULL);
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printf("json_c_visit(skip_arrays)=%d\n", rv);
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printf("================================\n\n");
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rv = json_c_visit(jso, 0, pop_and_stop, NULL);
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printf("json_c_visit(pop_and_stop)=%d\n", rv);
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printf("================================\n\n");
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rv = json_c_visit(jso, 0, err_on_subobj2, NULL);
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printf("json_c_visit(err_on_subobj2)=%d\n", rv);
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printf("================================\n\n");
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rv = json_c_visit(jso, 0, pop_array, NULL);
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printf("json_c_visit(pop_array)=%d\n", rv);
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printf("================================\n\n");
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rv = json_c_visit(jso, 0, stop_array, NULL);
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printf("json_c_visit(stop_array)=%d\n", rv);
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printf("================================\n\n");
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rv = json_c_visit(jso, 0, err_return, NULL);
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printf("json_c_visit(err_return)=%d\n", rv);
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printf("================================\n\n");
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json_object_put(jso);
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return 0;
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}
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static int emit_object(json_object *jso, int flags, json_object *parent_jso, const char *jso_key,
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size_t *jso_index, void *userarg)
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{
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printf("flags: 0x%x, key: %s, index: %ld, value: %s\n", flags,
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(jso_key ? jso_key : "(null)"), (jso_index ? (long)*jso_index : -1L),
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json_object_to_json_string(jso));
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return JSON_C_VISIT_RETURN_CONTINUE;
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}
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static int skip_arrays(json_object *jso, int flags, json_object *parent_jso, const char *jso_key,
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size_t *jso_index, void *userarg)
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{
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(void)emit_object(jso, flags, parent_jso, jso_key, jso_index, userarg);
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if (json_object_get_type(jso) == json_type_array)
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return JSON_C_VISIT_RETURN_SKIP;
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return JSON_C_VISIT_RETURN_CONTINUE;
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}
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static int pop_and_stop(json_object *jso, int flags, json_object *parent_jso, const char *jso_key,
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size_t *jso_index, void *userarg)
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{
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(void)emit_object(jso, flags, parent_jso, jso_key, jso_index, userarg);
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if (jso_key != NULL && strcmp(jso_key, "subobj1") == 0)
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{
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printf("POP after handling subobj1\n");
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return JSON_C_VISIT_RETURN_POP;
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}
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if (jso_key != NULL && strcmp(jso_key, "obj3") == 0)
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{
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printf("STOP after handling obj3\n");
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return JSON_C_VISIT_RETURN_STOP;
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}
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return JSON_C_VISIT_RETURN_CONTINUE;
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}
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static int err_on_subobj2(json_object *jso, int flags, json_object *parent_jso, const char *jso_key,
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size_t *jso_index, void *userarg)
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{
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(void)emit_object(jso, flags, parent_jso, jso_key, jso_index, userarg);
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if (jso_key != NULL && strcmp(jso_key, "subobj2") == 0)
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{
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printf("ERROR after handling subobj1\n");
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return JSON_C_VISIT_RETURN_ERROR;
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}
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return JSON_C_VISIT_RETURN_CONTINUE;
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}
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static int pop_array(json_object *jso, int flags, json_object *parent_jso, const char *jso_key,
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size_t *jso_index, void *userarg)
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{
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(void)emit_object(jso, flags, parent_jso, jso_key, jso_index, userarg);
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if (jso_index != NULL && (*jso_index == 0))
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{
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printf("POP after handling array[0]\n");
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return JSON_C_VISIT_RETURN_POP;
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}
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return JSON_C_VISIT_RETURN_CONTINUE;
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}
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static int stop_array(json_object *jso, int flags, json_object *parent_jso, const char *jso_key,
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size_t *jso_index, void *userarg)
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{
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(void)emit_object(jso, flags, parent_jso, jso_key, jso_index, userarg);
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if (jso_index != NULL && (*jso_index == 0))
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{
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printf("STOP after handling array[1]\n");
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return JSON_C_VISIT_RETURN_STOP;
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}
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return JSON_C_VISIT_RETURN_CONTINUE;
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}
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static int err_return(json_object *jso, int flags, json_object *parent_jso, const char *jso_key,
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size_t *jso_index, void *userarg)
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{
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printf("flags: 0x%x, key: %s, index: %ld, value: %s\n", flags,
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(jso_key ? jso_key : "(null)"), (jso_index ? (long)*jso_index : -1L),
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json_object_to_json_string(jso));
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return 100;
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}
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