1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2013 Lennart Poettering
12 #include "bus-signature.h"
15 static int signature_element_length_internal(
17 bool allow_dict_entry,
19 unsigned struct_depth,
29 if (bus_type_is_basic(*s) || *s == SD_BUS_TYPE_VARIANT) {
34 if (*s == SD_BUS_TYPE_ARRAY) {
37 if (array_depth >= 32)
40 r = signature_element_length_internal(s + 1, true, array_depth+1, struct_depth, &t);
48 if (*s == SD_BUS_TYPE_STRUCT_BEGIN) {
49 const char *p = s + 1;
51 if (struct_depth >= 32)
54 while (*p != SD_BUS_TYPE_STRUCT_END) {
57 r = signature_element_length_internal(p, false, array_depth, struct_depth+1, &t);
68 if (*s == SD_BUS_TYPE_DICT_ENTRY_BEGIN && allow_dict_entry) {
69 const char *p = s + 1;
72 if (struct_depth >= 32)
75 while (*p != SD_BUS_TYPE_DICT_ENTRY_END) {
78 if (n == 0 && !bus_type_is_basic(*p))
81 r = signature_element_length_internal(p, false, array_depth, struct_depth+1, &t);
99 int signature_element_length(const char *s, size_t *l) {
100 return signature_element_length_internal(s, true, 0, 0, l);
103 bool signature_is_single(const char *s, bool allow_dict_entry) {
110 r = signature_element_length_internal(s, allow_dict_entry, 0, 0, &t);
117 bool signature_is_pair(const char *s) {
122 if (!bus_type_is_basic(*s))
125 return signature_is_single(s + 1, false);
128 bool signature_is_valid(const char *s, bool allow_dict_entry) {
139 r = signature_element_length_internal(p, allow_dict_entry, 0, 0, &t);