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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "device/core/device_info_query_win.h" | |
| 6 | |
| 7 #include <stddef.h> | |
| 8 #include <string.h> | |
| 9 | |
| 10 #include "base/strings/string_util.h" | |
| 11 | |
| 12 namespace device { | |
| 13 | |
| 14 DeviceInfoQueryWin::DeviceInfoQueryWin() | |
| 15 : device_info_list_(SetupDiCreateDeviceInfoList(nullptr, nullptr)) { | |
| 16 memset(&device_info_data_, 0, sizeof(device_info_data_)); | |
| 17 } | |
| 18 | |
| 19 DeviceInfoQueryWin::~DeviceInfoQueryWin() { | |
| 20 if (device_info_list_valid()) { | |
| 21 // Release |device_info_data_| only when it is valid. | |
| 22 if (device_info_data_.cbSize != 0) | |
| 23 SetupDiDeleteDeviceInfo(device_info_list_, &device_info_data_); | |
| 24 SetupDiDestroyDeviceInfoList(device_info_list_); | |
| 25 } | |
| 26 } | |
| 27 | |
| 28 bool DeviceInfoQueryWin::AddDevice(const char* device_path) { | |
| 29 return SetupDiOpenDeviceInterfaceA(device_info_list_, device_path, 0, | |
| 30 nullptr) != FALSE; | |
| 31 } | |
| 32 | |
| 33 bool DeviceInfoQueryWin::GetDeviceInfo() { | |
| 34 DCHECK_EQ(0U, device_info_data_.cbSize); | |
| 35 device_info_data_.cbSize = sizeof(device_info_data_); | |
| 36 if (!SetupDiEnumDeviceInfo(device_info_list_, 0, &device_info_data_)) { | |
| 37 // Clear cbSize to maintain the invariant. | |
| 38 device_info_data_.cbSize = 0; | |
| 39 return false; | |
| 40 } | |
| 41 return true; | |
| 42 } | |
| 43 | |
| 44 bool DeviceInfoQueryWin::GetDeviceStringProperty(DWORD property, | |
| 45 std::string* property_buffer) { | |
| 46 DWORD property_reg_data_type; | |
| 47 const size_t property_buffer_length = 512; | |
| 48 if (!SetupDiGetDeviceRegistryPropertyA( | |
| 49 device_info_list_, &device_info_data_, property, | |
| 50 &property_reg_data_type, | |
| 51 reinterpret_cast<PBYTE>( | |
| 52 base::WriteInto(property_buffer, property_buffer_length)), | |
| 53 static_cast<DWORD>(property_buffer_length), nullptr)) | |
| 54 return false; | |
| 55 | |
| 56 if (property_reg_data_type != REG_SZ) | |
| 57 return false; | |
| 58 | |
| 59 // Shrink |property_buffer| down to its correct size. | |
| 60 size_t eos = property_buffer->find('\0'); | |
| 61 if (eos != std::string::npos) | |
| 62 property_buffer->resize(eos); | |
| 63 | |
| 64 return true; | |
| 65 } | |
| 66 | |
| 67 } // namespace device | |
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Chromium Code Reviews
Issue 2417043002:
Move device/core files to device/base directory. (Closed)
