1 /*
2 * Copyright 2021 HIMSA II K/S - www.himsa.com.
3 * Represented by EHIMA - www.ehima.com
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #include "has_preset.h"
19
20 namespace le_audio {
21 namespace has {
22
FromCharacteristicValue(uint16_t & len,const uint8_t * value)23 std::optional<HasPreset> HasPreset::FromCharacteristicValue(
24 uint16_t& len, const uint8_t* value) {
25 if ((len < kCharValueMinSize) ||
26 (len > kCharValueMinSize + kPresetNameLengthLimit)) {
27 LOG(ERROR) << __func__ << " Preset record to long: " << len;
28 return std::nullopt;
29 }
30
31 HasPreset preset;
32 STREAM_TO_UINT8(preset.index_, value);
33 --len;
34 STREAM_TO_UINT8(preset.properties_, value);
35 --len;
36 preset.name_ = std::string(value, value + len);
37
38 return preset;
39 }
40
ToCharacteristicValue(std::vector<uint8_t> & value) const41 void HasPreset::ToCharacteristicValue(std::vector<uint8_t>& value) const {
42 auto initial_offset = value.size();
43
44 value.resize(value.size() + kCharValueMinSize + name_.size());
45 auto pp = value.data() + initial_offset;
46
47 UINT8_TO_STREAM(pp, index_);
48 UINT8_TO_STREAM(pp, properties_);
49 ARRAY_TO_STREAM(pp, name_.c_str(), (int)name_.size());
50 }
51
Serialize(uint8_t * p_out,size_t buffer_size) const52 uint8_t* HasPreset::Serialize(uint8_t* p_out, size_t buffer_size) const {
53 if (buffer_size < SerializedSize()) {
54 LOG(ERROR) << "Invalid output buffer size!";
55 return p_out;
56 }
57
58 uint8_t name_len = name_.length();
59 if (name_len > kPresetNameLengthLimit) {
60 LOG(ERROR) << __func__
61 << " Invalid preset name length. Cannot be serialized!";
62 return p_out;
63 }
64
65 /* Serialized data length */
66 UINT8_TO_STREAM(p_out, name_len + 2);
67
68 UINT8_TO_STREAM(p_out, index_);
69 UINT8_TO_STREAM(p_out, properties_);
70 ARRAY_TO_STREAM(p_out, name_.c_str(), (int)name_.size());
71 return p_out;
72 }
73
Deserialize(const uint8_t * p_in,size_t len,HasPreset & preset)74 const uint8_t* HasPreset::Deserialize(const uint8_t* p_in, size_t len,
75 HasPreset& preset) {
76 const uint8_t nonamed_size = HasPreset(0, 0).SerializedSize();
77 auto* p_curr = p_in;
78
79 if (len < nonamed_size) {
80 LOG(ERROR) << "Invalid buffer size " << +len << ". Cannot deserialize.";
81 return p_in;
82 }
83
84 uint8_t serialized_data_len;
85 STREAM_TO_UINT8(serialized_data_len, p_curr);
86 if (serialized_data_len < 2) {
87 LOG(ERROR) << __func__ << " Invalid data size. Cannot be deserialized!";
88 return p_in;
89 }
90
91 auto name_len = serialized_data_len - 2;
92 if ((name_len > kPresetNameLengthLimit) ||
93 ((size_t)nonamed_size + name_len > len)) {
94 LOG(ERROR) << __func__
95 << " Invalid preset name length. Cannot be deserialized!";
96 return p_in;
97 }
98
99 STREAM_TO_UINT8(preset.index_, p_curr);
100 STREAM_TO_UINT8(preset.properties_, p_curr);
101 if (name_len) preset.name_ = std::string((const char*)p_curr, name_len);
102
103 return p_curr + name_len;
104 }
105
operator <<(std::ostream & os,const HasPreset & b)106 std::ostream& operator<<(std::ostream& os, const HasPreset& b) {
107 os << "{\"index\": " << +b.GetIndex();
108 os << ", \"name\": \"" << b.GetName() << "\"";
109 os << ", \"is_available\": " << (b.IsAvailable() ? "\"True\"" : "\"False\"");
110 os << ", \"is_writable\": " << (b.IsWritable() ? "\"True\"" : "\"False\"");
111 os << "}";
112 return os;
113 }
114
115 } // namespace has
116 } // namespace le_audio
117