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/*
* Copyright 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "get_item_attributes.h"
namespace bluetooth {
namespace avrcp {
std::unique_ptr<GetItemAttributesResponseBuilder>
GetItemAttributesResponseBuilder::MakeBuilder(Status status, size_t mtu) {
std::unique_ptr<GetItemAttributesResponseBuilder> builder(
new GetItemAttributesResponseBuilder(status, mtu));
return builder;
}
bool GetItemAttributesResponseBuilder::AddAttributeEntry(AttributeEntry entry) {
CHECK(entries_.size() < 0xFF);
size_t remaining_space = mtu_ - size();
if (entry.size() > remaining_space) {
entry.resize(remaining_space);
}
if (entry.empty()) {
return false;
}
entries_.insert(entry);
return true;
}
bool GetItemAttributesResponseBuilder::AddAttributeEntry(Attribute attribute,
std::string value) {
return AddAttributeEntry(AttributeEntry(attribute, value));
}
size_t GetItemAttributesResponseBuilder::size() const {
size_t len = BrowsePacket::kMinSize();
len += 1; // Status
if (status_ != Status::NO_ERROR) return len;
len += 1; // Number of attributes
for (const auto& entry : entries_) {
len += entry.size();
}
return len;
}
bool GetItemAttributesResponseBuilder::Serialize(
const std::shared_ptr<::bluetooth::Packet>& pkt) {
ReserveSpace(pkt, size());
BrowsePacketBuilder::PushHeader(pkt, size() - BrowsePacket::kMinSize());
AddPayloadOctets1(pkt, (uint8_t)status_);
if (status_ != Status::NO_ERROR) return true;
AddPayloadOctets1(pkt, entries_.size());
for (const auto& entry : entries_) {
AddPayloadOctets4(pkt, base::ByteSwap((uint32_t)entry.attribute()));
uint16_t character_set = 0x006a; // UTF-8
AddPayloadOctets2(pkt, base::ByteSwap(character_set));
uint16_t value_length = entry.value().length();
AddPayloadOctets2(pkt, base::ByteSwap(value_length));
for (const uint8_t& byte : entry.value()) {
AddPayloadOctets1(pkt, byte);
}
}
return true;
}
Scope GetItemAttributesRequest::GetScope() const {
auto it = begin() + BrowsePacket::kMinSize();
return static_cast<Scope>(*it);
}
uint64_t GetItemAttributesRequest::GetUid() const {
auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(1);
return it.extractBE<uint64_t>();
}
uint16_t GetItemAttributesRequest::GetUidCounter() const {
auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(9);
return it.extractBE<uint16_t>();
}
uint8_t GetItemAttributesRequest::GetNumAttributes() const {
auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(11);
return *it;
}
std::vector<Attribute> GetItemAttributesRequest::GetAttributesRequested()
const {
auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(11);
size_t number_of_attributes = it.extract<uint8_t>();
std::vector<Attribute> attribute_list;
for (size_t i = 0; i < number_of_attributes; i++) {
attribute_list.push_back((Attribute)it.extractBE<uint32_t>());
}
return attribute_list;
}
bool GetItemAttributesRequest::IsValid() const {
if (!BrowsePacket::IsValid()) return false;
if (size() < kMinSize()) return false;
// Casting the int returned from end - attr_start should be fine. If an
// overflow occurs we can definitly say the packet is invalid
return (GetNumAttributes() * sizeof(Attribute)) == (size() - kMinSize());
}
std::string GetItemAttributesRequest::ToString() const {
std::stringstream ss;
ss << "GetItemAttributesRequestPacket: " << std::endl;
ss << " └ PDU = " << GetPdu() << std::endl;
ss << " └ Length = " << GetLength() << std::endl;
ss << " └ Scope = " << GetScope() << std::endl;
ss << " └ UID Requested = " << loghex(GetUid()) << std::endl;
ss << " └ UID Counter = " << loghex(GetUidCounter()) << std::endl;
ss << " └ Num Attributes = " << loghex(GetNumAttributes()) << std::endl;
auto attr_list = GetAttributesRequested();
ss << " └ Attribute List: Size: " << attr_list.size() << std::endl;
for (auto it = attr_list.begin(); it != attr_list.end(); it++) {
ss << " └ " << loghex((uint32_t)(*it)) << std::endl;
}
ss << std::endl;
return ss.str();
}
} // namespace avrcp
} // namespace bluetooth
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