henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2003-2008, Google Inc. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 19 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 20 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 21 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 22 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 23 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 24 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 25 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | // Registry configuration wrapers class implementation |
| 29 | // |
| 30 | // Change made by S. Ganesh - ganesh@google.com: |
| 31 | // Use SHQueryValueEx instead of RegQueryValueEx throughout. |
| 32 | // A call to the SHLWAPI function is essentially a call to the standard |
| 33 | // function but with post-processing: |
| 34 | // * to fix REG_SZ or REG_EXPAND_SZ data that is not properly null-terminated; |
| 35 | // * to expand REG_EXPAND_SZ data. |
| 36 | |
| 37 | #include "talk/base/win32regkey.h" |
| 38 | |
| 39 | #include <shlwapi.h> |
| 40 | |
| 41 | #include "talk/base/common.h" |
| 42 | #include "talk/base/logging.h" |
| 43 | #include "talk/base/scoped_ptr.h" |
| 44 | |
| 45 | namespace talk_base { |
| 46 | |
| 47 | RegKey::RegKey() { |
| 48 | h_key_ = NULL; |
| 49 | } |
| 50 | |
| 51 | RegKey::~RegKey() { |
| 52 | Close(); |
| 53 | } |
| 54 | |
| 55 | HRESULT RegKey::Create(HKEY parent_key, const wchar_t* key_name) { |
| 56 | return Create(parent_key, |
| 57 | key_name, |
| 58 | REG_NONE, |
| 59 | REG_OPTION_NON_VOLATILE, |
| 60 | KEY_ALL_ACCESS, |
| 61 | NULL, |
| 62 | NULL); |
| 63 | } |
| 64 | |
| 65 | HRESULT RegKey::Open(HKEY parent_key, const wchar_t* key_name) { |
| 66 | return Open(parent_key, key_name, KEY_ALL_ACCESS); |
| 67 | } |
| 68 | |
| 69 | bool RegKey::HasValue(const TCHAR* value_name) const { |
| 70 | return (ERROR_SUCCESS == ::RegQueryValueEx(h_key_, value_name, NULL, |
| 71 | NULL, NULL, NULL)); |
| 72 | } |
| 73 | |
| 74 | HRESULT RegKey::SetValue(const wchar_t* full_key_name, |
| 75 | const wchar_t* value_name, |
| 76 | DWORD value) { |
| 77 | ASSERT(full_key_name != NULL); |
| 78 | |
| 79 | return SetValueStaticHelper(full_key_name, value_name, REG_DWORD, &value); |
| 80 | } |
| 81 | |
| 82 | HRESULT RegKey::SetValue(const wchar_t* full_key_name, |
| 83 | const wchar_t* value_name, |
| 84 | DWORD64 value) { |
| 85 | ASSERT(full_key_name != NULL); |
| 86 | |
| 87 | return SetValueStaticHelper(full_key_name, value_name, REG_QWORD, &value); |
| 88 | } |
| 89 | |
| 90 | HRESULT RegKey::SetValue(const wchar_t* full_key_name, |
| 91 | const wchar_t* value_name, |
| 92 | float value) { |
| 93 | ASSERT(full_key_name != NULL); |
| 94 | |
| 95 | return SetValueStaticHelper(full_key_name, value_name, |
| 96 | REG_BINARY, &value, sizeof(value)); |
| 97 | } |
| 98 | |
| 99 | HRESULT RegKey::SetValue(const wchar_t* full_key_name, |
| 100 | const wchar_t* value_name, |
| 101 | double value) { |
| 102 | ASSERT(full_key_name != NULL); |
| 103 | |
| 104 | return SetValueStaticHelper(full_key_name, value_name, |
| 105 | REG_BINARY, &value, sizeof(value)); |
| 106 | } |
| 107 | |
| 108 | HRESULT RegKey::SetValue(const wchar_t* full_key_name, |
| 109 | const wchar_t* value_name, |
| 110 | const TCHAR* value) { |
| 111 | ASSERT(full_key_name != NULL); |
| 112 | ASSERT(value != NULL); |
| 113 | |
| 114 | return SetValueStaticHelper(full_key_name, value_name, |
| 115 | REG_SZ, const_cast<wchar_t*>(value)); |
| 116 | } |
| 117 | |
| 118 | HRESULT RegKey::SetValue(const wchar_t* full_key_name, |
| 119 | const wchar_t* value_name, |
| 120 | const uint8* value, |
| 121 | DWORD byte_count) { |
| 122 | ASSERT(full_key_name != NULL); |
| 123 | |
| 124 | return SetValueStaticHelper(full_key_name, value_name, REG_BINARY, |
| 125 | const_cast<uint8*>(value), byte_count); |
| 126 | } |
| 127 | |
| 128 | HRESULT RegKey::SetValueMultiSZ(const wchar_t* full_key_name, |
| 129 | const wchar_t* value_name, |
| 130 | const uint8* value, |
| 131 | DWORD byte_count) { |
| 132 | ASSERT(full_key_name != NULL); |
| 133 | |
| 134 | return SetValueStaticHelper(full_key_name, value_name, REG_MULTI_SZ, |
| 135 | const_cast<uint8*>(value), byte_count); |
| 136 | } |
| 137 | |
| 138 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 139 | const wchar_t* value_name, |
| 140 | DWORD* value) { |
| 141 | ASSERT(full_key_name != NULL); |
| 142 | ASSERT(value != NULL); |
| 143 | |
| 144 | return GetValueStaticHelper(full_key_name, value_name, REG_DWORD, value); |
| 145 | } |
| 146 | |
| 147 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 148 | const wchar_t* value_name, |
| 149 | DWORD64* value) { |
| 150 | ASSERT(full_key_name != NULL); |
| 151 | ASSERT(value != NULL); |
| 152 | |
| 153 | return GetValueStaticHelper(full_key_name, value_name, REG_QWORD, value); |
| 154 | } |
| 155 | |
| 156 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 157 | const wchar_t* value_name, |
| 158 | float* value) { |
| 159 | ASSERT(value != NULL); |
| 160 | ASSERT(full_key_name != NULL); |
| 161 | |
| 162 | DWORD byte_count = 0; |
wu@webrtc.org | 5c9dd59 | 2013-10-25 21:18:33 +0000 | [diff] [blame] | 163 | scoped_ptr<byte[]> buffer; |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 164 | HRESULT hr = GetValueStaticHelper(full_key_name, value_name, |
| 165 | REG_BINARY, buffer.accept(), &byte_count); |
| 166 | if (SUCCEEDED(hr)) { |
| 167 | ASSERT(byte_count == sizeof(*value)); |
| 168 | if (byte_count == sizeof(*value)) { |
| 169 | *value = *reinterpret_cast<float*>(buffer.get()); |
| 170 | } |
| 171 | } |
| 172 | return hr; |
| 173 | } |
| 174 | |
| 175 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 176 | const wchar_t* value_name, |
| 177 | double* value) { |
| 178 | ASSERT(value != NULL); |
| 179 | ASSERT(full_key_name != NULL); |
| 180 | |
| 181 | DWORD byte_count = 0; |
wu@webrtc.org | 5c9dd59 | 2013-10-25 21:18:33 +0000 | [diff] [blame] | 182 | scoped_ptr<byte[]> buffer; |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 183 | HRESULT hr = GetValueStaticHelper(full_key_name, value_name, |
| 184 | REG_BINARY, buffer.accept(), &byte_count); |
| 185 | if (SUCCEEDED(hr)) { |
| 186 | ASSERT(byte_count == sizeof(*value)); |
| 187 | if (byte_count == sizeof(*value)) { |
| 188 | *value = *reinterpret_cast<double*>(buffer.get()); |
| 189 | } |
| 190 | } |
| 191 | return hr; |
| 192 | } |
| 193 | |
| 194 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 195 | const wchar_t* value_name, |
| 196 | wchar_t** value) { |
| 197 | ASSERT(full_key_name != NULL); |
| 198 | ASSERT(value != NULL); |
| 199 | |
| 200 | return GetValueStaticHelper(full_key_name, value_name, REG_SZ, value); |
| 201 | } |
| 202 | |
| 203 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 204 | const wchar_t* value_name, |
| 205 | std::wstring* value) { |
| 206 | ASSERT(full_key_name != NULL); |
| 207 | ASSERT(value != NULL); |
| 208 | |
wu@webrtc.org | 5c9dd59 | 2013-10-25 21:18:33 +0000 | [diff] [blame] | 209 | scoped_ptr<wchar_t[]> buffer; |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 210 | HRESULT hr = RegKey::GetValue(full_key_name, value_name, buffer.accept()); |
| 211 | if (SUCCEEDED(hr)) { |
| 212 | value->assign(buffer.get()); |
| 213 | } |
| 214 | return hr; |
| 215 | } |
| 216 | |
| 217 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 218 | const wchar_t* value_name, |
| 219 | std::vector<std::wstring>* value) { |
| 220 | ASSERT(full_key_name != NULL); |
| 221 | ASSERT(value != NULL); |
| 222 | |
| 223 | return GetValueStaticHelper(full_key_name, value_name, REG_MULTI_SZ, value); |
| 224 | } |
| 225 | |
| 226 | HRESULT RegKey::GetValue(const wchar_t* full_key_name, |
| 227 | const wchar_t* value_name, |
| 228 | uint8** value, |
| 229 | DWORD* byte_count) { |
| 230 | ASSERT(full_key_name != NULL); |
| 231 | ASSERT(value != NULL); |
| 232 | ASSERT(byte_count != NULL); |
| 233 | |
| 234 | return GetValueStaticHelper(full_key_name, value_name, |
| 235 | REG_BINARY, value, byte_count); |
| 236 | } |
| 237 | |
| 238 | HRESULT RegKey::DeleteSubKey(const wchar_t* key_name) { |
| 239 | ASSERT(key_name != NULL); |
| 240 | ASSERT(h_key_ != NULL); |
| 241 | |
| 242 | LONG res = ::RegDeleteKey(h_key_, key_name); |
| 243 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 244 | if (hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) || |
| 245 | hr == HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND)) { |
| 246 | hr = S_FALSE; |
| 247 | } |
| 248 | return hr; |
| 249 | } |
| 250 | |
| 251 | HRESULT RegKey::DeleteValue(const wchar_t* value_name) { |
| 252 | ASSERT(h_key_ != NULL); |
| 253 | |
| 254 | LONG res = ::RegDeleteValue(h_key_, value_name); |
| 255 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 256 | if (hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) || |
| 257 | hr == HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND)) { |
| 258 | hr = S_FALSE; |
| 259 | } |
| 260 | return hr; |
| 261 | } |
| 262 | |
| 263 | HRESULT RegKey::Close() { |
| 264 | HRESULT hr = S_OK; |
| 265 | if (h_key_ != NULL) { |
| 266 | LONG res = ::RegCloseKey(h_key_); |
| 267 | hr = HRESULT_FROM_WIN32(res); |
| 268 | h_key_ = NULL; |
| 269 | } |
| 270 | return hr; |
| 271 | } |
| 272 | |
| 273 | HRESULT RegKey::Create(HKEY parent_key, |
| 274 | const wchar_t* key_name, |
| 275 | wchar_t* lpszClass, |
| 276 | DWORD options, |
| 277 | REGSAM sam_desired, |
| 278 | LPSECURITY_ATTRIBUTES lpSecAttr, |
| 279 | LPDWORD lpdwDisposition) { |
| 280 | ASSERT(key_name != NULL); |
| 281 | ASSERT(parent_key != NULL); |
| 282 | |
| 283 | DWORD dw = 0; |
| 284 | HKEY h_key = NULL; |
| 285 | LONG res = ::RegCreateKeyEx(parent_key, key_name, 0, lpszClass, options, |
| 286 | sam_desired, lpSecAttr, &h_key, &dw); |
| 287 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 288 | |
| 289 | if (lpdwDisposition) { |
| 290 | *lpdwDisposition = dw; |
| 291 | } |
| 292 | |
| 293 | // we have to close the currently opened key |
| 294 | // before replacing it with the new one |
| 295 | if (hr == S_OK) { |
| 296 | hr = Close(); |
| 297 | ASSERT(hr == S_OK); |
| 298 | h_key_ = h_key; |
| 299 | } |
| 300 | return hr; |
| 301 | } |
| 302 | |
| 303 | HRESULT RegKey::Open(HKEY parent_key, |
| 304 | const wchar_t* key_name, |
| 305 | REGSAM sam_desired) { |
| 306 | ASSERT(key_name != NULL); |
| 307 | ASSERT(parent_key != NULL); |
| 308 | |
| 309 | HKEY h_key = NULL; |
| 310 | LONG res = ::RegOpenKeyEx(parent_key, key_name, 0, sam_desired, &h_key); |
| 311 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 312 | |
| 313 | // we have to close the currently opened key |
| 314 | // before replacing it with the new one |
| 315 | if (hr == S_OK) { |
| 316 | // close the currently opened key if any |
| 317 | hr = Close(); |
| 318 | ASSERT(hr == S_OK); |
| 319 | h_key_ = h_key; |
| 320 | } |
| 321 | return hr; |
| 322 | } |
| 323 | |
| 324 | // save the key and all of its subkeys and values to a file |
| 325 | HRESULT RegKey::Save(const wchar_t* full_key_name, const wchar_t* file_name) { |
| 326 | ASSERT(full_key_name != NULL); |
| 327 | ASSERT(file_name != NULL); |
| 328 | |
| 329 | std::wstring key_name(full_key_name); |
| 330 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 331 | if (!h_key) { |
| 332 | return E_FAIL; |
| 333 | } |
| 334 | |
| 335 | RegKey key; |
| 336 | HRESULT hr = key.Open(h_key, key_name.c_str(), KEY_READ); |
| 337 | if (FAILED(hr)) { |
| 338 | return hr; |
| 339 | } |
| 340 | |
| 341 | AdjustCurrentProcessPrivilege(SE_BACKUP_NAME, true); |
| 342 | LONG res = ::RegSaveKey(key.h_key_, file_name, NULL); |
| 343 | AdjustCurrentProcessPrivilege(SE_BACKUP_NAME, false); |
| 344 | |
| 345 | return HRESULT_FROM_WIN32(res); |
| 346 | } |
| 347 | |
| 348 | // restore the key and all of its subkeys and values which are saved into a file |
| 349 | HRESULT RegKey::Restore(const wchar_t* full_key_name, |
| 350 | const wchar_t* file_name) { |
| 351 | ASSERT(full_key_name != NULL); |
| 352 | ASSERT(file_name != NULL); |
| 353 | |
| 354 | std::wstring key_name(full_key_name); |
| 355 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 356 | if (!h_key) { |
| 357 | return E_FAIL; |
| 358 | } |
| 359 | |
| 360 | RegKey key; |
| 361 | HRESULT hr = key.Open(h_key, key_name.c_str(), KEY_WRITE); |
| 362 | if (FAILED(hr)) { |
| 363 | return hr; |
| 364 | } |
| 365 | |
| 366 | AdjustCurrentProcessPrivilege(SE_RESTORE_NAME, true); |
| 367 | LONG res = ::RegRestoreKey(key.h_key_, file_name, REG_FORCE_RESTORE); |
| 368 | AdjustCurrentProcessPrivilege(SE_RESTORE_NAME, false); |
| 369 | |
| 370 | return HRESULT_FROM_WIN32(res); |
| 371 | } |
| 372 | |
| 373 | // check if the current key has the specified subkey |
| 374 | bool RegKey::HasSubkey(const wchar_t* key_name) const { |
| 375 | ASSERT(key_name != NULL); |
| 376 | |
| 377 | RegKey key; |
| 378 | HRESULT hr = key.Open(h_key_, key_name, KEY_READ); |
| 379 | key.Close(); |
| 380 | return hr == S_OK; |
| 381 | } |
| 382 | |
| 383 | // static flush key |
| 384 | HRESULT RegKey::FlushKey(const wchar_t* full_key_name) { |
| 385 | ASSERT(full_key_name != NULL); |
| 386 | |
| 387 | HRESULT hr = HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND); |
| 388 | // get the root HKEY |
| 389 | std::wstring key_name(full_key_name); |
| 390 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 391 | |
| 392 | if (h_key != NULL) { |
| 393 | LONG res = ::RegFlushKey(h_key); |
| 394 | hr = HRESULT_FROM_WIN32(res); |
| 395 | } |
| 396 | return hr; |
| 397 | } |
| 398 | |
| 399 | // static SET helper |
| 400 | HRESULT RegKey::SetValueStaticHelper(const wchar_t* full_key_name, |
| 401 | const wchar_t* value_name, |
| 402 | DWORD type, |
| 403 | LPVOID value, |
| 404 | DWORD byte_count) { |
| 405 | ASSERT(full_key_name != NULL); |
| 406 | |
| 407 | HRESULT hr = HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND); |
| 408 | // get the root HKEY |
| 409 | std::wstring key_name(full_key_name); |
| 410 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 411 | |
| 412 | if (h_key != NULL) { |
| 413 | RegKey key; |
| 414 | hr = key.Create(h_key, key_name.c_str()); |
| 415 | if (hr == S_OK) { |
| 416 | switch (type) { |
| 417 | case REG_DWORD: |
| 418 | hr = key.SetValue(value_name, *(static_cast<DWORD*>(value))); |
| 419 | break; |
| 420 | case REG_QWORD: |
| 421 | hr = key.SetValue(value_name, *(static_cast<DWORD64*>(value))); |
| 422 | break; |
| 423 | case REG_SZ: |
| 424 | hr = key.SetValue(value_name, static_cast<const wchar_t*>(value)); |
| 425 | break; |
| 426 | case REG_BINARY: |
| 427 | hr = key.SetValue(value_name, static_cast<const uint8*>(value), |
| 428 | byte_count); |
| 429 | break; |
| 430 | case REG_MULTI_SZ: |
| 431 | hr = key.SetValue(value_name, static_cast<const uint8*>(value), |
| 432 | byte_count, type); |
| 433 | break; |
| 434 | default: |
| 435 | ASSERT(false); |
| 436 | hr = HRESULT_FROM_WIN32(ERROR_DATATYPE_MISMATCH); |
| 437 | break; |
| 438 | } |
| 439 | // close the key after writing |
| 440 | HRESULT temp_hr = key.Close(); |
| 441 | if (hr == S_OK) { |
| 442 | hr = temp_hr; |
| 443 | } |
| 444 | } |
| 445 | } |
| 446 | return hr; |
| 447 | } |
| 448 | |
| 449 | // static GET helper |
| 450 | HRESULT RegKey::GetValueStaticHelper(const wchar_t* full_key_name, |
| 451 | const wchar_t* value_name, |
| 452 | DWORD type, |
| 453 | LPVOID value, |
| 454 | DWORD* byte_count) { |
| 455 | ASSERT(full_key_name != NULL); |
| 456 | |
| 457 | HRESULT hr = HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND); |
| 458 | // get the root HKEY |
| 459 | std::wstring key_name(full_key_name); |
| 460 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 461 | |
| 462 | if (h_key != NULL) { |
| 463 | RegKey key; |
| 464 | hr = key.Open(h_key, key_name.c_str(), KEY_READ); |
| 465 | if (hr == S_OK) { |
| 466 | switch (type) { |
| 467 | case REG_DWORD: |
| 468 | hr = key.GetValue(value_name, reinterpret_cast<DWORD*>(value)); |
| 469 | break; |
| 470 | case REG_QWORD: |
| 471 | hr = key.GetValue(value_name, reinterpret_cast<DWORD64*>(value)); |
| 472 | break; |
| 473 | case REG_SZ: |
| 474 | hr = key.GetValue(value_name, reinterpret_cast<wchar_t**>(value)); |
| 475 | break; |
| 476 | case REG_MULTI_SZ: |
| 477 | hr = key.GetValue(value_name, reinterpret_cast< |
| 478 | std::vector<std::wstring>*>(value)); |
| 479 | break; |
| 480 | case REG_BINARY: |
| 481 | hr = key.GetValue(value_name, reinterpret_cast<uint8**>(value), |
| 482 | byte_count); |
| 483 | break; |
| 484 | default: |
| 485 | ASSERT(false); |
| 486 | hr = HRESULT_FROM_WIN32(ERROR_DATATYPE_MISMATCH); |
| 487 | break; |
| 488 | } |
| 489 | // close the key after writing |
| 490 | HRESULT temp_hr = key.Close(); |
| 491 | if (hr == S_OK) { |
| 492 | hr = temp_hr; |
| 493 | } |
| 494 | } |
| 495 | } |
| 496 | return hr; |
| 497 | } |
| 498 | |
| 499 | // GET helper |
| 500 | HRESULT RegKey::GetValueHelper(const wchar_t* value_name, |
| 501 | DWORD* type, |
| 502 | uint8** value, |
| 503 | DWORD* byte_count) const { |
| 504 | ASSERT(byte_count != NULL); |
| 505 | ASSERT(value != NULL); |
| 506 | ASSERT(type != NULL); |
| 507 | |
| 508 | // init return buffer |
| 509 | *value = NULL; |
| 510 | |
| 511 | // get the size of the return data buffer |
| 512 | LONG res = ::SHQueryValueEx(h_key_, value_name, NULL, type, NULL, byte_count); |
| 513 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 514 | |
| 515 | if (hr == S_OK) { |
| 516 | // if the value length is 0, nothing to do |
| 517 | if (*byte_count != 0) { |
| 518 | // allocate the buffer |
| 519 | *value = new byte[*byte_count]; |
| 520 | ASSERT(*value != NULL); |
| 521 | |
| 522 | // make the call again to get the data |
| 523 | res = ::SHQueryValueEx(h_key_, value_name, NULL, |
| 524 | type, *value, byte_count); |
| 525 | hr = HRESULT_FROM_WIN32(res); |
| 526 | ASSERT(hr == S_OK); |
| 527 | } |
| 528 | } |
| 529 | return hr; |
| 530 | } |
| 531 | |
| 532 | // Int32 Get |
| 533 | HRESULT RegKey::GetValue(const wchar_t* value_name, DWORD* value) const { |
| 534 | ASSERT(value != NULL); |
| 535 | |
| 536 | DWORD type = 0; |
| 537 | DWORD byte_count = sizeof(DWORD); |
| 538 | LONG res = ::SHQueryValueEx(h_key_, value_name, NULL, &type, |
| 539 | value, &byte_count); |
| 540 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 541 | ASSERT((hr != S_OK) || (type == REG_DWORD)); |
| 542 | ASSERT((hr != S_OK) || (byte_count == sizeof(DWORD))); |
| 543 | return hr; |
| 544 | } |
| 545 | |
| 546 | // Int64 Get |
| 547 | HRESULT RegKey::GetValue(const wchar_t* value_name, DWORD64* value) const { |
| 548 | ASSERT(value != NULL); |
| 549 | |
| 550 | DWORD type = 0; |
| 551 | DWORD byte_count = sizeof(DWORD64); |
| 552 | LONG res = ::SHQueryValueEx(h_key_, value_name, NULL, &type, |
| 553 | value, &byte_count); |
| 554 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 555 | ASSERT((hr != S_OK) || (type == REG_QWORD)); |
| 556 | ASSERT((hr != S_OK) || (byte_count == sizeof(DWORD64))); |
| 557 | return hr; |
| 558 | } |
| 559 | |
| 560 | // String Get |
| 561 | HRESULT RegKey::GetValue(const wchar_t* value_name, wchar_t** value) const { |
| 562 | ASSERT(value != NULL); |
| 563 | |
| 564 | DWORD byte_count = 0; |
| 565 | DWORD type = 0; |
| 566 | |
| 567 | // first get the size of the string buffer |
| 568 | LONG res = ::SHQueryValueEx(h_key_, value_name, NULL, |
| 569 | &type, NULL, &byte_count); |
| 570 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 571 | |
| 572 | if (hr == S_OK) { |
| 573 | // allocate room for the string and a terminating \0 |
| 574 | *value = new wchar_t[(byte_count / sizeof(wchar_t)) + 1]; |
| 575 | |
| 576 | if ((*value) != NULL) { |
| 577 | if (byte_count != 0) { |
| 578 | // make the call again |
| 579 | res = ::SHQueryValueEx(h_key_, value_name, NULL, &type, |
| 580 | *value, &byte_count); |
| 581 | hr = HRESULT_FROM_WIN32(res); |
| 582 | } else { |
| 583 | (*value)[0] = L'\0'; |
| 584 | } |
| 585 | |
| 586 | ASSERT((hr != S_OK) || (type == REG_SZ) || |
| 587 | (type == REG_MULTI_SZ) || (type == REG_EXPAND_SZ)); |
| 588 | } else { |
| 589 | hr = E_OUTOFMEMORY; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | return hr; |
| 594 | } |
| 595 | |
| 596 | // get a string value |
| 597 | HRESULT RegKey::GetValue(const wchar_t* value_name, std::wstring* value) const { |
| 598 | ASSERT(value != NULL); |
| 599 | |
| 600 | DWORD byte_count = 0; |
| 601 | DWORD type = 0; |
| 602 | |
| 603 | // first get the size of the string buffer |
| 604 | LONG res = ::SHQueryValueEx(h_key_, value_name, NULL, |
| 605 | &type, NULL, &byte_count); |
| 606 | HRESULT hr = HRESULT_FROM_WIN32(res); |
| 607 | |
| 608 | if (hr == S_OK) { |
| 609 | if (byte_count != 0) { |
| 610 | // Allocate some memory and make the call again |
| 611 | value->resize(byte_count / sizeof(wchar_t) + 1); |
| 612 | res = ::SHQueryValueEx(h_key_, value_name, NULL, &type, |
| 613 | &value->at(0), &byte_count); |
| 614 | hr = HRESULT_FROM_WIN32(res); |
| 615 | value->resize(wcslen(value->data())); |
| 616 | } else { |
| 617 | value->clear(); |
| 618 | } |
| 619 | |
| 620 | ASSERT((hr != S_OK) || (type == REG_SZ) || |
| 621 | (type == REG_MULTI_SZ) || (type == REG_EXPAND_SZ)); |
| 622 | } |
| 623 | |
| 624 | return hr; |
| 625 | } |
| 626 | |
| 627 | // convert REG_MULTI_SZ bytes to string array |
| 628 | HRESULT RegKey::MultiSZBytesToStringArray(const uint8* buffer, |
| 629 | DWORD byte_count, |
| 630 | std::vector<std::wstring>* value) { |
| 631 | ASSERT(buffer != NULL); |
| 632 | ASSERT(value != NULL); |
| 633 | |
| 634 | const wchar_t* data = reinterpret_cast<const wchar_t*>(buffer); |
| 635 | DWORD data_len = byte_count / sizeof(wchar_t); |
| 636 | value->clear(); |
| 637 | if (data_len > 1) { |
| 638 | // must be terminated by two null characters |
| 639 | if (data[data_len - 1] != 0 || data[data_len - 2] != 0) { |
| 640 | return E_INVALIDARG; |
| 641 | } |
| 642 | |
| 643 | // put null-terminated strings into arrays |
| 644 | while (*data) { |
| 645 | std::wstring str(data); |
| 646 | value->push_back(str); |
| 647 | data += str.length() + 1; |
| 648 | } |
| 649 | } |
| 650 | return S_OK; |
| 651 | } |
| 652 | |
| 653 | // get a std::vector<std::wstring> value from REG_MULTI_SZ type |
| 654 | HRESULT RegKey::GetValue(const wchar_t* value_name, |
| 655 | std::vector<std::wstring>* value) const { |
| 656 | ASSERT(value != NULL); |
| 657 | |
| 658 | DWORD byte_count = 0; |
| 659 | DWORD type = 0; |
| 660 | uint8* buffer = 0; |
| 661 | |
| 662 | // first get the size of the buffer |
| 663 | HRESULT hr = GetValueHelper(value_name, &type, &buffer, &byte_count); |
| 664 | ASSERT((hr != S_OK) || (type == REG_MULTI_SZ)); |
| 665 | |
| 666 | if (SUCCEEDED(hr)) { |
| 667 | hr = MultiSZBytesToStringArray(buffer, byte_count, value); |
| 668 | } |
| 669 | |
| 670 | return hr; |
| 671 | } |
| 672 | |
| 673 | // Binary data Get |
| 674 | HRESULT RegKey::GetValue(const wchar_t* value_name, |
| 675 | uint8** value, |
| 676 | DWORD* byte_count) const { |
| 677 | ASSERT(byte_count != NULL); |
| 678 | ASSERT(value != NULL); |
| 679 | |
| 680 | DWORD type = 0; |
| 681 | HRESULT hr = GetValueHelper(value_name, &type, value, byte_count); |
| 682 | ASSERT((hr != S_OK) || (type == REG_MULTI_SZ) || (type == REG_BINARY)); |
| 683 | return hr; |
| 684 | } |
| 685 | |
| 686 | // Raw data get |
| 687 | HRESULT RegKey::GetValue(const wchar_t* value_name, |
| 688 | uint8** value, |
| 689 | DWORD* byte_count, |
| 690 | DWORD*type) const { |
| 691 | ASSERT(type != NULL); |
| 692 | ASSERT(byte_count != NULL); |
| 693 | ASSERT(value != NULL); |
| 694 | |
| 695 | return GetValueHelper(value_name, type, value, byte_count); |
| 696 | } |
| 697 | |
| 698 | // Int32 set |
| 699 | HRESULT RegKey::SetValue(const wchar_t* value_name, DWORD value) const { |
| 700 | ASSERT(h_key_ != NULL); |
| 701 | |
| 702 | LONG res = ::RegSetValueEx(h_key_, value_name, NULL, REG_DWORD, |
| 703 | reinterpret_cast<const uint8*>(&value), |
| 704 | sizeof(DWORD)); |
| 705 | return HRESULT_FROM_WIN32(res); |
| 706 | } |
| 707 | |
| 708 | // Int64 set |
| 709 | HRESULT RegKey::SetValue(const wchar_t* value_name, DWORD64 value) const { |
| 710 | ASSERT(h_key_ != NULL); |
| 711 | |
| 712 | LONG res = ::RegSetValueEx(h_key_, value_name, NULL, REG_QWORD, |
| 713 | reinterpret_cast<const uint8*>(&value), |
| 714 | sizeof(DWORD64)); |
| 715 | return HRESULT_FROM_WIN32(res); |
| 716 | } |
| 717 | |
| 718 | // String set |
| 719 | HRESULT RegKey::SetValue(const wchar_t* value_name, |
| 720 | const wchar_t* value) const { |
| 721 | ASSERT(value != NULL); |
| 722 | ASSERT(h_key_ != NULL); |
| 723 | |
| 724 | LONG res = ::RegSetValueEx(h_key_, value_name, NULL, REG_SZ, |
| 725 | reinterpret_cast<const uint8*>(value), |
| 726 | (lstrlen(value) + 1) * sizeof(wchar_t)); |
| 727 | return HRESULT_FROM_WIN32(res); |
| 728 | } |
| 729 | |
| 730 | // Binary data set |
| 731 | HRESULT RegKey::SetValue(const wchar_t* value_name, |
| 732 | const uint8* value, |
| 733 | DWORD byte_count) const { |
| 734 | ASSERT(h_key_ != NULL); |
| 735 | |
| 736 | // special case - if 'value' is NULL make sure byte_count is zero |
| 737 | if (value == NULL) { |
| 738 | byte_count = 0; |
| 739 | } |
| 740 | |
| 741 | LONG res = ::RegSetValueEx(h_key_, value_name, NULL, |
| 742 | REG_BINARY, value, byte_count); |
| 743 | return HRESULT_FROM_WIN32(res); |
| 744 | } |
| 745 | |
| 746 | // Raw data set |
| 747 | HRESULT RegKey::SetValue(const wchar_t* value_name, |
| 748 | const uint8* value, |
| 749 | DWORD byte_count, |
| 750 | DWORD type) const { |
| 751 | ASSERT(value != NULL); |
| 752 | ASSERT(h_key_ != NULL); |
| 753 | |
| 754 | LONG res = ::RegSetValueEx(h_key_, value_name, NULL, type, value, byte_count); |
| 755 | return HRESULT_FROM_WIN32(res); |
| 756 | } |
| 757 | |
| 758 | bool RegKey::HasKey(const wchar_t* full_key_name) { |
| 759 | ASSERT(full_key_name != NULL); |
| 760 | |
| 761 | // get the root HKEY |
| 762 | std::wstring key_name(full_key_name); |
| 763 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 764 | |
| 765 | if (h_key != NULL) { |
| 766 | RegKey key; |
| 767 | HRESULT hr = key.Open(h_key, key_name.c_str(), KEY_READ); |
| 768 | key.Close(); |
| 769 | return S_OK == hr; |
| 770 | } |
| 771 | return false; |
| 772 | } |
| 773 | |
| 774 | // static version of HasValue |
| 775 | bool RegKey::HasValue(const wchar_t* full_key_name, const wchar_t* value_name) { |
| 776 | ASSERT(full_key_name != NULL); |
| 777 | |
| 778 | bool has_value = false; |
| 779 | // get the root HKEY |
| 780 | std::wstring key_name(full_key_name); |
| 781 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 782 | |
| 783 | if (h_key != NULL) { |
| 784 | RegKey key; |
| 785 | if (key.Open(h_key, key_name.c_str(), KEY_READ) == S_OK) { |
| 786 | has_value = key.HasValue(value_name); |
| 787 | key.Close(); |
| 788 | } |
| 789 | } |
| 790 | return has_value; |
| 791 | } |
| 792 | |
| 793 | HRESULT RegKey::GetValueType(const wchar_t* full_key_name, |
| 794 | const wchar_t* value_name, |
| 795 | DWORD* value_type) { |
| 796 | ASSERT(full_key_name != NULL); |
| 797 | ASSERT(value_type != NULL); |
| 798 | |
| 799 | *value_type = REG_NONE; |
| 800 | |
| 801 | std::wstring key_name(full_key_name); |
| 802 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 803 | |
| 804 | RegKey key; |
| 805 | HRESULT hr = key.Open(h_key, key_name.c_str(), KEY_READ); |
| 806 | if (SUCCEEDED(hr)) { |
| 807 | LONG res = ::SHQueryValueEx(key.h_key_, value_name, NULL, value_type, |
| 808 | NULL, NULL); |
| 809 | if (res != ERROR_SUCCESS) { |
| 810 | hr = HRESULT_FROM_WIN32(res); |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | return hr; |
| 815 | } |
| 816 | |
| 817 | HRESULT RegKey::DeleteKey(const wchar_t* full_key_name) { |
| 818 | ASSERT(full_key_name != NULL); |
| 819 | |
| 820 | return DeleteKey(full_key_name, true); |
| 821 | } |
| 822 | |
| 823 | HRESULT RegKey::DeleteKey(const wchar_t* full_key_name, bool recursively) { |
| 824 | ASSERT(full_key_name != NULL); |
| 825 | |
| 826 | // need to open the parent key first |
| 827 | // get the root HKEY |
| 828 | std::wstring key_name(full_key_name); |
| 829 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 830 | |
| 831 | // get the parent key |
| 832 | std::wstring parent_key(GetParentKeyInfo(&key_name)); |
| 833 | |
| 834 | RegKey key; |
| 835 | HRESULT hr = key.Open(h_key, parent_key.c_str()); |
| 836 | |
| 837 | if (hr == S_OK) { |
| 838 | hr = recursively ? key.RecurseDeleteSubKey(key_name.c_str()) |
| 839 | : key.DeleteSubKey(key_name.c_str()); |
| 840 | } else if (hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) || |
| 841 | hr == HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND)) { |
| 842 | hr = S_FALSE; |
| 843 | } |
| 844 | |
| 845 | key.Close(); |
| 846 | return hr; |
| 847 | } |
| 848 | |
| 849 | HRESULT RegKey::DeleteValue(const wchar_t* full_key_name, |
| 850 | const wchar_t* value_name) { |
| 851 | ASSERT(full_key_name != NULL); |
| 852 | |
| 853 | HRESULT hr = HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND); |
| 854 | // get the root HKEY |
| 855 | std::wstring key_name(full_key_name); |
| 856 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 857 | |
| 858 | if (h_key != NULL) { |
| 859 | RegKey key; |
| 860 | hr = key.Open(h_key, key_name.c_str()); |
| 861 | if (hr == S_OK) { |
| 862 | hr = key.DeleteValue(value_name); |
| 863 | key.Close(); |
| 864 | } |
| 865 | } |
| 866 | return hr; |
| 867 | } |
| 868 | |
| 869 | HRESULT RegKey::RecurseDeleteSubKey(const wchar_t* key_name) { |
| 870 | ASSERT(key_name != NULL); |
| 871 | |
| 872 | RegKey key; |
| 873 | HRESULT hr = key.Open(h_key_, key_name); |
| 874 | |
| 875 | if (hr == S_OK) { |
| 876 | // enumerate all subkeys of this key and recursivelly delete them |
| 877 | FILETIME time = {0}; |
| 878 | wchar_t key_name_buf[kMaxKeyNameChars] = {0}; |
| 879 | DWORD key_name_buf_size = kMaxKeyNameChars; |
| 880 | while (hr == S_OK && |
| 881 | ::RegEnumKeyEx(key.h_key_, 0, key_name_buf, &key_name_buf_size, |
| 882 | NULL, NULL, NULL, &time) == ERROR_SUCCESS) { |
| 883 | hr = key.RecurseDeleteSubKey(key_name_buf); |
| 884 | |
| 885 | // restore the buffer size |
| 886 | key_name_buf_size = kMaxKeyNameChars; |
| 887 | } |
| 888 | // close the top key |
| 889 | key.Close(); |
| 890 | } |
| 891 | |
| 892 | if (hr == S_OK) { |
| 893 | // the key has no more children keys |
| 894 | // delete the key and all of its values |
| 895 | hr = DeleteSubKey(key_name); |
| 896 | } |
| 897 | |
| 898 | return hr; |
| 899 | } |
| 900 | |
| 901 | HKEY RegKey::GetRootKeyInfo(std::wstring* full_key_name) { |
| 902 | ASSERT(full_key_name != NULL); |
| 903 | |
| 904 | HKEY h_key = NULL; |
| 905 | // get the root HKEY |
| 906 | size_t index = full_key_name->find(L'\\'); |
| 907 | std::wstring root_key; |
| 908 | |
| 909 | if (index == -1) { |
| 910 | root_key = *full_key_name; |
| 911 | *full_key_name = L""; |
| 912 | } else { |
| 913 | root_key = full_key_name->substr(0, index); |
| 914 | *full_key_name = full_key_name->substr(index + 1, |
| 915 | full_key_name->length() - index - 1); |
| 916 | } |
| 917 | |
| 918 | for (std::wstring::iterator iter = root_key.begin(); |
| 919 | iter != root_key.end(); ++iter) { |
| 920 | *iter = toupper(*iter); |
| 921 | } |
| 922 | |
| 923 | if (!root_key.compare(L"HKLM") || |
| 924 | !root_key.compare(L"HKEY_LOCAL_MACHINE")) { |
| 925 | h_key = HKEY_LOCAL_MACHINE; |
| 926 | } else if (!root_key.compare(L"HKCU") || |
| 927 | !root_key.compare(L"HKEY_CURRENT_USER")) { |
| 928 | h_key = HKEY_CURRENT_USER; |
| 929 | } else if (!root_key.compare(L"HKU") || |
| 930 | !root_key.compare(L"HKEY_USERS")) { |
| 931 | h_key = HKEY_USERS; |
| 932 | } else if (!root_key.compare(L"HKCR") || |
| 933 | !root_key.compare(L"HKEY_CLASSES_ROOT")) { |
| 934 | h_key = HKEY_CLASSES_ROOT; |
| 935 | } |
| 936 | |
| 937 | return h_key; |
| 938 | } |
| 939 | |
| 940 | |
| 941 | // Returns true if this key name is 'safe' for deletion |
| 942 | // (doesn't specify a key root) |
| 943 | bool RegKey::SafeKeyNameForDeletion(const wchar_t* key_name) { |
| 944 | ASSERT(key_name != NULL); |
| 945 | std::wstring key(key_name); |
| 946 | |
| 947 | HKEY root_key = GetRootKeyInfo(&key); |
| 948 | |
| 949 | if (!root_key) { |
| 950 | key = key_name; |
| 951 | } |
| 952 | if (key.empty()) { |
| 953 | return false; |
| 954 | } |
| 955 | bool found_subkey = false, backslash_found = false; |
| 956 | for (size_t i = 0 ; i < key.length() ; ++i) { |
| 957 | if (key[i] == L'\\') { |
| 958 | backslash_found = true; |
| 959 | } else if (backslash_found) { |
| 960 | found_subkey = true; |
| 961 | break; |
| 962 | } |
| 963 | } |
| 964 | return (root_key == HKEY_USERS) ? found_subkey : true; |
| 965 | } |
| 966 | |
| 967 | std::wstring RegKey::GetParentKeyInfo(std::wstring* key_name) { |
| 968 | ASSERT(key_name != NULL); |
| 969 | |
| 970 | // get the parent key |
| 971 | size_t index = key_name->rfind(L'\\'); |
| 972 | std::wstring parent_key; |
| 973 | if (index == -1) { |
| 974 | parent_key = L""; |
| 975 | } else { |
| 976 | parent_key = key_name->substr(0, index); |
| 977 | *key_name = key_name->substr(index + 1, key_name->length() - index - 1); |
| 978 | } |
| 979 | |
| 980 | return parent_key; |
| 981 | } |
| 982 | |
| 983 | // get the number of values for this key |
| 984 | uint32 RegKey::GetValueCount() { |
| 985 | DWORD num_values = 0; |
| 986 | |
henrike@webrtc.org | bc4ec12 | 2014-04-04 22:33:34 +0000 | [diff] [blame] | 987 | if (ERROR_SUCCESS != ::RegQueryInfoKey( |
| 988 | h_key_, // key handle |
| 989 | NULL, // buffer for class name |
| 990 | NULL, // size of class string |
| 991 | NULL, // reserved |
| 992 | NULL, // number of subkeys |
| 993 | NULL, // longest subkey size |
| 994 | NULL, // longest class string |
| 995 | &num_values, // number of values for this key |
| 996 | NULL, // longest value name |
| 997 | NULL, // longest value data |
| 998 | NULL, // security descriptor |
| 999 | NULL)) { // last write time |
| 1000 | ASSERT(false); |
| 1001 | } |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1002 | return num_values; |
| 1003 | } |
| 1004 | |
| 1005 | // Enumerators for the value_names for this key |
| 1006 | |
| 1007 | // Called to get the value name for the given value name index |
| 1008 | // Use GetValueCount() to get the total value_name count for this key |
| 1009 | // Returns failure if no key at the specified index |
| 1010 | HRESULT RegKey::GetValueNameAt(int index, std::wstring* value_name, |
| 1011 | DWORD* type) { |
| 1012 | ASSERT(value_name != NULL); |
| 1013 | |
| 1014 | LONG res = ERROR_SUCCESS; |
| 1015 | wchar_t value_name_buf[kMaxValueNameChars] = {0}; |
| 1016 | DWORD value_name_buf_size = kMaxValueNameChars; |
| 1017 | res = ::RegEnumValue(h_key_, index, value_name_buf, &value_name_buf_size, |
| 1018 | NULL, type, NULL, NULL); |
| 1019 | |
| 1020 | if (res == ERROR_SUCCESS) { |
| 1021 | value_name->assign(value_name_buf); |
| 1022 | } |
| 1023 | |
| 1024 | return HRESULT_FROM_WIN32(res); |
| 1025 | } |
| 1026 | |
| 1027 | uint32 RegKey::GetSubkeyCount() { |
| 1028 | // number of values for key |
| 1029 | DWORD num_subkeys = 0; |
| 1030 | |
henrike@webrtc.org | bc4ec12 | 2014-04-04 22:33:34 +0000 | [diff] [blame] | 1031 | if (ERROR_SUCCESS != ::RegQueryInfoKey( |
| 1032 | h_key_, // key handle |
| 1033 | NULL, // buffer for class name |
| 1034 | NULL, // size of class string |
| 1035 | NULL, // reserved |
| 1036 | &num_subkeys, // number of subkeys |
| 1037 | NULL, // longest subkey size |
| 1038 | NULL, // longest class string |
| 1039 | NULL, // number of values for this key |
| 1040 | NULL, // longest value name |
| 1041 | NULL, // longest value data |
| 1042 | NULL, // security descriptor |
| 1043 | NULL)) { // last write time |
| 1044 | ASSERT(false); |
| 1045 | } |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1046 | return num_subkeys; |
| 1047 | } |
| 1048 | |
| 1049 | HRESULT RegKey::GetSubkeyNameAt(int index, std::wstring* key_name) { |
| 1050 | ASSERT(key_name != NULL); |
| 1051 | |
| 1052 | LONG res = ERROR_SUCCESS; |
| 1053 | wchar_t key_name_buf[kMaxKeyNameChars] = {0}; |
| 1054 | DWORD key_name_buf_size = kMaxKeyNameChars; |
| 1055 | |
| 1056 | res = ::RegEnumKeyEx(h_key_, index, key_name_buf, &key_name_buf_size, |
| 1057 | NULL, NULL, NULL, NULL); |
| 1058 | |
| 1059 | if (res == ERROR_SUCCESS) { |
| 1060 | key_name->assign(key_name_buf); |
| 1061 | } |
| 1062 | |
| 1063 | return HRESULT_FROM_WIN32(res); |
| 1064 | } |
| 1065 | |
| 1066 | // Is the key empty: having no sub-keys and values |
| 1067 | bool RegKey::IsKeyEmpty(const wchar_t* full_key_name) { |
| 1068 | ASSERT(full_key_name != NULL); |
| 1069 | |
| 1070 | bool is_empty = true; |
| 1071 | |
| 1072 | // Get the root HKEY |
| 1073 | std::wstring key_name(full_key_name); |
| 1074 | HKEY h_key = GetRootKeyInfo(&key_name); |
| 1075 | |
| 1076 | // Open the key to check |
| 1077 | if (h_key != NULL) { |
| 1078 | RegKey key; |
| 1079 | HRESULT hr = key.Open(h_key, key_name.c_str(), KEY_READ); |
| 1080 | if (SUCCEEDED(hr)) { |
| 1081 | is_empty = key.GetSubkeyCount() == 0 && key.GetValueCount() == 0; |
| 1082 | key.Close(); |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | return is_empty; |
| 1087 | } |
| 1088 | |
| 1089 | bool AdjustCurrentProcessPrivilege(const TCHAR* privilege, bool to_enable) { |
| 1090 | ASSERT(privilege != NULL); |
| 1091 | |
| 1092 | bool ret = false; |
| 1093 | HANDLE token; |
| 1094 | if (::OpenProcessToken(::GetCurrentProcess(), |
| 1095 | TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &token)) { |
| 1096 | LUID luid; |
| 1097 | memset(&luid, 0, sizeof(luid)); |
| 1098 | if (::LookupPrivilegeValue(NULL, privilege, &luid)) { |
| 1099 | TOKEN_PRIVILEGES privs; |
| 1100 | privs.PrivilegeCount = 1; |
| 1101 | privs.Privileges[0].Luid = luid; |
| 1102 | privs.Privileges[0].Attributes = to_enable ? SE_PRIVILEGE_ENABLED : 0; |
| 1103 | if (::AdjustTokenPrivileges(token, FALSE, &privs, 0, NULL, 0)) { |
| 1104 | ret = true; |
| 1105 | } else { |
| 1106 | LOG_GLE(LS_ERROR) << "AdjustTokenPrivileges failed"; |
| 1107 | } |
| 1108 | } else { |
| 1109 | LOG_GLE(LS_ERROR) << "LookupPrivilegeValue failed"; |
| 1110 | } |
| 1111 | CloseHandle(token); |
| 1112 | } else { |
| 1113 | LOG_GLE(LS_ERROR) << "OpenProcessToken(GetCurrentProcess) failed"; |
| 1114 | } |
| 1115 | |
| 1116 | return ret; |
| 1117 | } |
| 1118 | |
| 1119 | } // namespace talk_base |