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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 
32 namespace 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.
37 static const unsigned maxFilenameLength = 255;
38 
isInvalidFileCharacter(UChar c)39 static 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 
validateFilename(String & name,String & extension)46 void 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