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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "chrome/installer/util/delete_tree_work_item.h" | 5 #include "chrome/installer/util/delete_tree_work_item.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 #include <limits> | 8 #include <limits> |
| 9 | 9 |
| 10 #include "base/files/file_util.h" | 10 #include "base/files/file_util.h" |
| 11 #include "base/logging.h" | 11 #include "base/logging.h" |
| 12 | 12 |
| 13 namespace { | 13 namespace { |
| 14 | 14 |
| 15 // Casts a value of an unsigned type to a signed type of the same size provided | 15 // Casts a value of an unsigned type to a signed type of the same size provided |
| 16 // that there is no overflow. | 16 // that there is no overflow. |
| 17 template<typename L, typename R> | 17 template<typename L, typename R> |
| 18 bool SafeCast(L left, R* right) { | 18 bool SafeCast(L left, R* right) { |
| 19 DCHECK(right); | 19 DCHECK(right); |
| 20 COMPILE_ASSERT(sizeof(left) == sizeof(right), | 20 static_assert(sizeof(left) == sizeof(right), |
| 21 must_add_support_for_crazy_data_types); | 21 "Items SafeCast is used with must be of the same size"); |
| 22 if (left > static_cast<L>(std::numeric_limits<R>::max())) | 22 if (left > static_cast<L>(std::numeric_limits<R>::max())) |
| 23 return false; | 23 return false; |
| 24 *right = static_cast<L>(left); | 24 *right = static_cast<L>(left); |
| 25 return true; | 25 return true; |
| 26 } | 26 } |
| 27 | 27 |
| 28 } // namespace | 28 } // namespace |
| 29 | 29 |
| 30 DeleteTreeWorkItem::DeleteTreeWorkItem( | 30 DeleteTreeWorkItem::DeleteTreeWorkItem( |
| 31 const base::FilePath& root_path, | 31 const base::FilePath& root_path, |
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| 158 backup_dir.path().Append(key_file.BaseName()); | 158 backup_dir.path().Append(key_file.BaseName()); |
| 159 if (base::PathExists(backup_file) && | 159 if (base::PathExists(backup_file) && |
| 160 !base::Move(backup_file, key_file)) { | 160 !base::Move(backup_file, key_file)) { |
| 161 // This could happen if we could not delete the key file to begin with. | 161 // This could happen if we could not delete the key file to begin with. |
| 162 PLOG(WARNING) << "Rollback: Failed to move backup file back in place: " | 162 PLOG(WARNING) << "Rollback: Failed to move backup file back in place: " |
| 163 << backup_file.value() << " to " << key_file.value(); | 163 << backup_file.value() << " to " << key_file.value(); |
| 164 } | 164 } |
| 165 } | 165 } |
| 166 } | 166 } |
| 167 } | 167 } |
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