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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 <algorithm>
#include "get_element_attributes_packet.h"
namespace bluetooth {
namespace avrcp {
uint64_t GetElementAttributesRequest::GetIdentifier() const {
auto it = begin() + VendorPacket::kMinSize();
return it.extract<uint64_t>();
}
uint8_t GetElementAttributesRequest::GetNumAttributes() const {
auto it = begin() + VendorPacket::kMinSize() + static_cast<size_t>(8);
return it.extract<uint8_t>();
}
std::vector<Attribute> GetElementAttributesRequest::GetAttributesRequested()
const {
auto it = begin() + VendorPacket::kMinSize() + static_cast<size_t>(8);
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 GetElementAttributesRequest::IsValid() const {
if (!VendorPacket::IsValid()) return false;
if (size() < kMinSize()) return false;
size_t num_attributes = GetNumAttributes();
auto attr_start = begin() + VendorPacket::kMinSize() + static_cast<size_t>(9);
// Casting the int returned from end - attr_start should be fine. If an
// overflow occurs we can definitly say the packet is invalid
return (num_attributes * sizeof(Attribute)) == (size_t)(end() - attr_start);
}
std::string GetElementAttributesRequest::ToString() const {
std::stringstream ss;
ss << "RegisterNotificationPacket: " << std::endl;
ss << " └ cType = " << GetCType() << std::endl;
ss << " └ Subunit Type = " << loghex(GetSubunitType()) << std::endl;
ss << " └ Subunit ID = " << loghex(GetSubunitId()) << std::endl;
ss << " └ OpCode = " << GetOpcode() << std::endl;
ss << " └ Company ID = " << loghex(GetCompanyId()) << std::endl;
ss << " └ Command PDU = " << GetCommandPdu() << std::endl;
ss << " └ PacketType = " << GetPacketType() << std::endl;
ss << " └ Parameter Length = " << GetParameterLength() << std::endl;
ss << " └ Identifier = " << loghex(GetIdentifier()) << 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();
}
std::unique_ptr<GetElementAttributesResponseBuilder>
GetElementAttributesResponseBuilder::MakeBuilder(size_t mtu) {
std::unique_ptr<GetElementAttributesResponseBuilder> builder(
new GetElementAttributesResponseBuilder(mtu));
return builder;
}
bool GetElementAttributesResponseBuilder::AddAttributeEntry(
AttributeEntry entry) {
CHECK_LT(entries_.size(), size_t(0xFF))
<< __func__ << ": attribute entry overflow";
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 GetElementAttributesResponseBuilder::AddAttributeEntry(Attribute attribute,
std::string value) {
return AddAttributeEntry(AttributeEntry(attribute, value));
}
size_t GetElementAttributesResponseBuilder::size() const {
size_t attr_list_size = 0;
for (auto& attribute_entry : entries_) {
attr_list_size += attribute_entry.size();
}
return VendorPacket::kMinSize() + 1 + attr_list_size;
}
bool GetElementAttributesResponseBuilder::Serialize(
const std::shared_ptr<::bluetooth::Packet>& pkt) {
ReserveSpace(pkt, size());
PacketBuilder::PushHeader(pkt);
VendorPacketBuilder::PushHeader(pkt, size() - VendorPacket::kMinSize());
AddPayloadOctets1(pkt, entries_.size());
for (const auto& attribute_entry : entries_) {
PushAttributeValue(pkt, attribute_entry);
}
return true;
}
} // namespace avrcp
} // namespace bluetooth
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