| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/installer/mini_installer/regkey.h" |
| |
| #include "chrome/installer/mini_installer/mini_installer_constants.h" |
| #include "chrome/installer/mini_installer/mini_string.h" |
| |
| namespace mini_installer { |
| |
| LONG RegKey::Open(HKEY key, const wchar_t* sub_key, REGSAM access) { |
| Close(); |
| return ::RegOpenKeyEx(key, sub_key, NULL, access, &key_); |
| } |
| |
| LONG RegKey::ReadSZValue(const wchar_t* value_name, |
| wchar_t* value, |
| size_t value_size) const { |
| DWORD type = 0; |
| DWORD byte_length = static_cast<DWORD>(value_size * sizeof(wchar_t)); |
| LONG result = ::RegQueryValueEx(key_, value_name, NULL, &type, |
| reinterpret_cast<BYTE*>(value), |
| &byte_length); |
| if (result == ERROR_SUCCESS) { |
| if (type != REG_SZ) { |
| result = ERROR_NOT_SUPPORTED; |
| } else if (byte_length == 0) { |
| *value = L'\0'; |
| } else if (value[byte_length/sizeof(wchar_t) - 1] != L'\0') { |
| if ((byte_length / sizeof(wchar_t)) < value_size) |
| value[byte_length / sizeof(wchar_t)] = L'\0'; |
| else |
| result = ERROR_MORE_DATA; |
| } |
| } |
| return result; |
| } |
| |
| LONG RegKey::ReadDWValue(const wchar_t* value_name, DWORD* value) const { |
| DWORD type = 0; |
| DWORD byte_length = sizeof(*value); |
| LONG result = ::RegQueryValueEx(key_, value_name, NULL, &type, |
| reinterpret_cast<BYTE*>(value), |
| &byte_length); |
| if (result == ERROR_SUCCESS) { |
| if (type != REG_DWORD) { |
| result = ERROR_NOT_SUPPORTED; |
| } else if (byte_length != sizeof(*value)) { |
| result = ERROR_NO_DATA; |
| } |
| } |
| return result; |
| } |
| |
| LONG RegKey::WriteSZValue(const wchar_t* value_name, const wchar_t* value) { |
| return ::RegSetValueEx(key_, value_name, 0, REG_SZ, |
| reinterpret_cast<const BYTE*>(value), |
| (lstrlen(value) + 1) * sizeof(wchar_t)); |
| } |
| |
| LONG RegKey::WriteDWValue(const wchar_t* value_name, DWORD value) { |
| return ::RegSetValueEx(key_, value_name, 0, REG_DWORD, |
| reinterpret_cast<const BYTE*>(&value), |
| sizeof(value)); |
| } |
| |
| void RegKey::Close() { |
| if (key_ != NULL) { |
| ::RegCloseKey(key_); |
| key_ = NULL; |
| } |
| } |
| |
| |
| // static |
| bool RegKey::ReadSZValue(HKEY root_key, const wchar_t *sub_key, |
| const wchar_t *value_name, wchar_t *value, |
| size_t size) { |
| RegKey key; |
| return (key.Open(root_key, sub_key, KEY_QUERY_VALUE) == ERROR_SUCCESS && |
| key.ReadSZValue(value_name, value, size) == ERROR_SUCCESS); |
| } |
| |
| // Opens the Google Update ClientState key for a product. This finds only |
| // registry entries for Chrome; it does not support the Chromium registry |
| // layout. |
| bool OpenClientStateKey(HKEY root_key, const wchar_t* app_guid, |
| REGSAM access, RegKey* key) { |
| StackString<MAX_PATH> client_state_key; |
| return client_state_key.assign(kClientStateKeyBase) && |
| client_state_key.append(app_guid) && |
| (key->Open(root_key, |
| client_state_key.get(), |
| access | KEY_WOW64_32KEY) == ERROR_SUCCESS); |
| } |
| |
| } // namespace mini_installer |