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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "device/base/device_info_query_win.h"
#include <stddef.h>
#include <string.h>
#include "base/compiler_specific.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
namespace device {
DeviceInfoQueryWin::DeviceInfoQueryWin()
: device_info_list_(SetupDiCreateDeviceInfoList(nullptr, nullptr)) {
UNSAFE_TODO(memset(&device_info_data_, 0, sizeof(device_info_data_)));
}
DeviceInfoQueryWin::~DeviceInfoQueryWin() {
if (device_info_list_valid()) {
// Release |device_info_data_| only when it is valid.
if (device_info_data_.cbSize != 0)
SetupDiDeleteDeviceInfo(device_info_list_, &device_info_data_);
SetupDiDestroyDeviceInfoList(device_info_list_);
}
}
bool DeviceInfoQueryWin::AddDevice(const std::wstring& device_path) {
return SetupDiOpenDeviceInterface(device_info_list_, device_path.c_str(), 0,
nullptr) != FALSE;
}
bool DeviceInfoQueryWin::GetDeviceInfo() {
DCHECK_EQ(0U, device_info_data_.cbSize);
device_info_data_.cbSize = sizeof(device_info_data_);
if (!SetupDiEnumDeviceInfo(device_info_list_, 0, &device_info_data_)) {
// Clear cbSize to maintain the invariant.
device_info_data_.cbSize = 0;
return false;
}
return true;
}
bool DeviceInfoQueryWin::GetDeviceStringProperty(const DEVPROPKEY& property,
std::string* property_buffer) {
DEVPROPTYPE property_type;
DWORD required_size;
if (SetupDiGetDeviceProperty(device_info_list_, &device_info_data_, &property,
&property_type, nullptr, 0, &required_size, 0) ||
GetLastError() != ERROR_INSUFFICIENT_BUFFER ||
property_type != DEVPROP_TYPE_STRING) {
return false;
}
std::u16string buffer;
if (!SetupDiGetDeviceProperty(
device_info_list_, &device_info_data_, &property, &property_type,
reinterpret_cast<PBYTE>(base::WriteInto(&buffer, required_size)),
required_size, nullptr, 0)) {
return false;
}
*property_buffer = base::UTF16ToUTF8(buffer);
return true;
}
} // namespace device
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