File: file_stream_reader.cc

package info (click to toggle)
chromium 138.0.7204.183-1
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 6,071,908 kB
  • sloc: cpp: 34,937,088; ansic: 7,176,967; javascript: 4,110,704; python: 1,419,953; asm: 946,768; xml: 739,971; pascal: 187,324; sh: 89,623; perl: 88,663; objc: 79,944; sql: 50,304; cs: 41,786; fortran: 24,137; makefile: 21,806; php: 13,980; tcl: 13,166; yacc: 8,925; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (27 lines) | stat: -rw-r--r-- 905 bytes parent folder | download | duplicates (9) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "storage/browser/file_system/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