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/*
* Copyright (c) 2016 Eric Haszlakiewicz
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See COPYING for details.
*/
#include <stdio.h>
#include "config.h"
#include "json_inttypes.h"
#include "json_object.h"
#include "json_visit.h"
#include "linkhash.h"
static int _json_c_visit(json_object *jso, json_object *parent_jso, const char *jso_key,
size_t *jso_index, json_c_visit_userfunc *userfunc, void *userarg);
int json_c_visit(json_object *jso, int future_flags, json_c_visit_userfunc *userfunc, void *userarg)
{
int ret = _json_c_visit(jso, NULL, NULL, NULL, userfunc, userarg);
switch (ret)
{
case JSON_C_VISIT_RETURN_CONTINUE:
case JSON_C_VISIT_RETURN_SKIP:
case JSON_C_VISIT_RETURN_POP:
case JSON_C_VISIT_RETURN_STOP: return 0;
default: return JSON_C_VISIT_RETURN_ERROR;
}
}
static int _json_c_visit(json_object *jso, json_object *parent_jso, const char *jso_key,
size_t *jso_index, json_c_visit_userfunc *userfunc, void *userarg)
{
int userret = userfunc(jso, 0, parent_jso, jso_key, jso_index, userarg);
switch (userret)
{
case JSON_C_VISIT_RETURN_CONTINUE: break;
case JSON_C_VISIT_RETURN_SKIP:
case JSON_C_VISIT_RETURN_POP:
case JSON_C_VISIT_RETURN_STOP:
case JSON_C_VISIT_RETURN_ERROR: return userret;
default:
fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n",
userret);
return JSON_C_VISIT_RETURN_ERROR;
}
switch (json_object_get_type(jso))
{
case json_type_null:
case json_type_boolean:
case json_type_double:
case json_type_int:
case json_type_string:
// we already called userfunc above, move on to the next object
return JSON_C_VISIT_RETURN_CONTINUE;
case json_type_object:
{
json_object_object_foreach(jso, key, child)
{
userret = _json_c_visit(child, jso, key, NULL, userfunc, userarg);
if (userret == JSON_C_VISIT_RETURN_POP)
break;
if (userret == JSON_C_VISIT_RETURN_STOP ||
userret == JSON_C_VISIT_RETURN_ERROR)
return userret;
if (userret != JSON_C_VISIT_RETURN_CONTINUE &&
userret != JSON_C_VISIT_RETURN_SKIP)
{
fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n",
userret);
return JSON_C_VISIT_RETURN_ERROR;
}
}
break;
}
case json_type_array:
{
size_t array_len = json_object_array_length(jso);
size_t ii;
for (ii = 0; ii < array_len; ii++)
{
json_object *child = json_object_array_get_idx(jso, ii);
userret = _json_c_visit(child, jso, NULL, &ii, userfunc, userarg);
if (userret == JSON_C_VISIT_RETURN_POP)
break;
if (userret == JSON_C_VISIT_RETURN_STOP ||
userret == JSON_C_VISIT_RETURN_ERROR)
return userret;
if (userret != JSON_C_VISIT_RETURN_CONTINUE &&
userret != JSON_C_VISIT_RETURN_SKIP)
{
fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n",
userret);
return JSON_C_VISIT_RETURN_ERROR;
}
}
break;
}
default:
fprintf(stderr, "INTERNAL ERROR: _json_c_visit found object of unknown type: %d\n",
json_object_get_type(jso));
return JSON_C_VISIT_RETURN_ERROR;
}
// Call userfunc for the second type on container types, after all
// members of the container have been visited.
// Non-container types will have already returned before this point.
userret = userfunc(jso, JSON_C_VISIT_SECOND, parent_jso, jso_key, jso_index, userarg);
switch (userret)
{
case JSON_C_VISIT_RETURN_SKIP:
case JSON_C_VISIT_RETURN_POP:
// These are not really sensible during JSON_C_VISIT_SECOND,
// but map them to JSON_C_VISIT_CONTINUE anyway.
// FALLTHROUGH
case JSON_C_VISIT_RETURN_CONTINUE: return JSON_C_VISIT_RETURN_CONTINUE;
case JSON_C_VISIT_RETURN_STOP:
case JSON_C_VISIT_RETURN_ERROR: return userret;
default:
fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n",
userret);
return JSON_C_VISIT_RETURN_ERROR;
}
// NOTREACHED
}
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