1/*
2 * Copyright (C) 2009 Apple Inc.  All rights reserved.
3 * Copyright (C) 2009 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "platform/clipboard/ClipboardUtilities.h"
29
30#include "wtf/text/WTFString.h"
31
32namespace blink {
33
34// On POSIX systems, the typical filename length limit is 255 character units. HFS+'s limit is
35// actually 255 Unicode characters using Apple's modification of Normzliation Form D, but the
36// differences aren't really worth dealing with here.
37static const unsigned maxFilenameLength = 255;
38
39static bool isInvalidFileCharacter(UChar c)
40{
41    // HFS+ disallows '/' and Linux systems also disallow null. For sanity's sake we'll also
42    // disallow control characters.
43    return c < ' ' || c == 0x7F || c == '/';
44}
45
46void validateFilename(String& name, String& extension)
47{
48    // Remove any invalid file system characters, especially "/".
49    name = name.removeCharacters(&isInvalidFileCharacter);
50    extension = extension.removeCharacters(&isInvalidFileCharacter);
51
52    // Remove a ridiculously-long extension.
53    if (extension.length() >= maxFilenameLength)
54        extension = String();
55
56    // Truncate an overly-long filename, reserving one character for a dot.
57    name.truncate(maxFilenameLength - extension.length() - 1);
58}
59
60} // namespace blink
61