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