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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <AK/StringView.h>
#include "Database.h"
namespace USBDB {
RefPtr<Database> Database::open(const String& filename)
{
auto file_or_error = Core::MappedFile::map(filename);
if (file_or_error.is_error())
return nullptr;
auto res = adopt_ref(*new Database(file_or_error.release_value()));
if (res->init() != 0)
return nullptr;
return res;
}
const StringView Database::get_vendor(u16 vendor_id) const
{
const auto& vendor = m_vendors.get(vendor_id);
if (!vendor.has_value())
return "";
return vendor.value()->name;
}
const StringView Database::get_device(u16 vendor_id, u16 device_id) const
{
const auto& vendor = m_vendors.get(vendor_id);
if (!vendor.has_value()) {
return "";
}
const auto& device = vendor.value()->devices.get(device_id);
if (!device.has_value())
return "";
return device.value()->name;
}
const StringView Database::get_interface(u16 vendor_id, u16 device_id, u16 interface_id) const
{
const auto& vendor = m_vendors.get(vendor_id);
if (!vendor.has_value())
return "";
const auto& device = vendor.value()->devices.get(device_id);
if (!device.has_value())
return "";
const auto& interface = device.value()->interfaces.get(interface_id);
if (!interface.has_value())
return "";
return interface.value()->name;
}
const StringView Database::get_class(u8 class_id) const
{
const auto& xclass = m_classes.get(class_id);
if (!xclass.has_value())
return "";
return xclass.value()->name;
}
const StringView Database::get_subclass(u8 class_id, u8 subclass_id) const
{
const auto& xclass = m_classes.get(class_id);
if (!xclass.has_value())
return "";
const auto& subclass = xclass.value()->subclasses.get(subclass_id);
if (!subclass.has_value())
return "";
return subclass.value()->name;
}
const StringView Database::get_protocol(u8 class_id, u8 subclass_id, u8 protocol_id) const
{
const auto& xclass = m_classes.get(class_id);
if (!xclass.has_value())
return "";
const auto& subclass = xclass.value()->subclasses.get(subclass_id);
if (!subclass.has_value())
return "";
const auto& protocol = subclass.value()->protocols.get(protocol_id);
if (!protocol.has_value())
return "";
return protocol.value()->name;
}
int Database::init()
{
if (m_ready)
return 0;
m_view = StringView { m_file->bytes() };
ParseMode mode = ParseMode::UnknownMode;
OwnPtr<Vendor> current_vendor {};
OwnPtr<Device> current_device {};
OwnPtr<Class> current_class {};
OwnPtr<Subclass> current_subclass {};
auto commit_device = [&]() {
if (current_device && current_vendor) {
auto id = current_device->id;
current_vendor->devices.set(id, current_device.release_nonnull());
}
};
auto commit_vendor = [&]() {
commit_device();
if (current_vendor) {
auto id = current_vendor->id;
m_vendors.set(id, current_vendor.release_nonnull());
}
};
auto commit_subclass = [&]() {
if (current_subclass && current_class) {
auto id = current_subclass->id;
current_class->subclasses.set(id, current_subclass.release_nonnull());
}
};
auto commit_class = [&]() {
commit_subclass();
if (current_class) {
auto id = current_class->id;
m_classes.set(id, current_class.release_nonnull());
}
};
auto commit_all = [&]() {
commit_vendor();
commit_class();
};
auto lines = m_view.split_view('\n');
for (auto& line : lines) {
if (line.length() < 2 || line[0] == '#')
continue;
if (line[0] == 'C') {
mode = ParseMode::ClassMode;
commit_all();
} else if ((line[0] >= '0' && line[0] <= '9') || (line[0] >= 'a' && line[0] <= 'f')) {
mode = ParseMode::VendorMode;
commit_all();
} else if (line[0] != '\t') {
mode = ParseMode::UnknownMode;
continue;
}
switch (mode) {
case ParseMode::VendorMode:
if (line[0] != '\t') {
commit_vendor();
current_vendor = make<Vendor>();
current_vendor->id = AK::StringUtils::convert_to_uint_from_hex<u16>(line.substring_view(0, 4)).value_or(0);
current_vendor->name = line.substring_view(6, line.length() - 6);
} else if (line[0] == '\t' && line[1] != '\t') {
commit_device();
current_device = make<Device>();
current_device->id = AK::StringUtils::convert_to_uint_from_hex<u16>((line.substring_view(1, 4))).value_or(0);
current_device->name = line.substring_view(7, line.length() - 7);
} else if (line[0] == '\t' && line[1] == '\t') {
auto interface = make<Interface>();
interface->interface = AK::StringUtils::convert_to_uint_from_hex<u16>((line.substring_view(2, 4))).value_or(0);
interface->name = line.substring_view(7, line.length() - 7);
current_device->interfaces.set(interface->interface, move(interface));
}
break;
case ParseMode::ClassMode:
if (line[0] != '\t') {
commit_class();
current_class = make<Class>();
current_class->id = AK::StringUtils::convert_to_uint_from_hex<u16>((line.substring_view(2, 2))).value_or(0);
current_class->name = line.substring_view(6, line.length() - 6);
} else if (line[0] == '\t' && line[1] != '\t') {
commit_subclass();
current_subclass = make<Subclass>();
current_subclass->id = AK::StringUtils::convert_to_uint_from_hex<u16>((line.substring_view(1, 2))).value_or(0);
current_subclass->name = line.substring_view(5, line.length() - 5);
} else if (line[0] == '\t' && line[1] == '\t') {
auto protocol = make<Protocol>();
protocol->id = AK::StringUtils::convert_to_uint_from_hex<u16>((line.substring_view(2, 2))).value_or(0);
protocol->name = line.substring_view(6, line.length() - 6);
current_subclass->protocols.set(protocol->id, move(protocol));
}
break;
default:
break;
}
}
commit_all();
m_ready = true;
return 0;
}
}
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