1 // Copyright 2023 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 #include "pw_protobuf/find.h"
16
17 #include "pw_protobuf/wire_format.h"
18
19 namespace pw::protobuf::internal {
20
AdvanceToField(Decoder & decoder,uint32_t field_number)21 Status AdvanceToField(Decoder& decoder, uint32_t field_number) {
22 if (!ValidFieldNumber(field_number)) {
23 return Status::InvalidArgument();
24 }
25
26 Status status;
27
28 while ((status = decoder.Next()).ok()) {
29 if (decoder.FieldNumber() == field_number) {
30 return OkStatus();
31 }
32 }
33
34 // As this is a backend for the Find() APIs, remap OUT_OF_RANGE to NOT_FOUND.
35 return status.IsOutOfRange() ? Status::NotFound() : status;
36 }
37
AdvanceToField(StreamDecoder & decoder,uint32_t field_number)38 Status AdvanceToField(StreamDecoder& decoder, uint32_t field_number) {
39 if (!ValidFieldNumber(field_number)) {
40 return Status::InvalidArgument();
41 }
42
43 Status status;
44
45 while ((status = decoder.Next()).ok()) {
46 PW_TRY_ASSIGN(uint32_t field, decoder.FieldNumber());
47 if (field == field_number) {
48 return OkStatus();
49 }
50 }
51
52 // As this is a backend for the Find() APIs, remap OUT_OF_RANGE to NOT_FOUND.
53 return status.IsOutOfRange() ? Status::NotFound() : status;
54 }
55
56 } // namespace pw::protobuf::internal
57