diff options
Diffstat (limited to 'comm/third_party/json-c/json_visit.c')
| -rw-r--r-- | comm/third_party/json-c/json_visit.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/comm/third_party/json-c/json_visit.c b/comm/third_party/json-c/json_visit.c new file mode 100644 index 0000000000..fb16fa6fa6 --- /dev/null +++ b/comm/third_party/json-c/json_visit.c @@ -0,0 +1,128 @@ +/* + * 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 +} |