| // Copyright 2014 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 "storage/browser/fileapi/file_stream_reader.h" |
| |
| #include <stdint.h> |
| |
| #include "base/time/time.h" |
| |
| namespace storage { |
| |
| // Int64->double->int64_t conversions (e.g. through Blink) may lose some |
| // precision in the microsecond range. Allow 10us delta. |
| const int kModificationTimeAllowedDeltaMicroseconds = 10; |
| |
| // Verify if the underlying file has not been modified. |
| bool FileStreamReader::VerifySnapshotTime( |
| const base::Time& expected_modification_time, |
| const base::File::Info& file_info) { |
| return expected_modification_time.is_null() || |
| (expected_modification_time - file_info.last_modified) |
| .magnitude() |
| .InMicroseconds() < kModificationTimeAllowedDeltaMicroseconds; |
| } |
| |
| } // namespace storage |