1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ppapi/shared_impl/file_ref_util.h"
6
7#include "base/files/file_path.h"
8#include "base/strings/string_util.h"
9#include "base/strings/utf_string_conversions.h"
10
11namespace ppapi {
12
13std::string GetNameForInternalFilePath(const std::string& path) {
14  if (path == "/")
15    return path;
16  size_t pos = path.rfind('/');
17  CHECK(pos != std::string::npos);
18  return path.substr(pos + 1);
19}
20
21std::string GetNameForExternalFilePath(const base::FilePath& path) {
22  const base::FilePath::StringType& file_path = path.value();
23  size_t pos = file_path.rfind(base::FilePath::kSeparators[0]);
24  CHECK(pos != base::FilePath::StringType::npos);
25#if defined(OS_WIN)
26  return base::WideToUTF8(file_path.substr(pos + 1));
27#elif defined(OS_POSIX)
28  return file_path.substr(pos + 1);
29#else
30#error "Unsupported platform."
31#endif
32}
33
34bool IsValidInternalPath(const std::string& path) {
35  // We check that:
36  //   The path starts with '/'
37  //   The path must contain valid UTF-8 characters.
38  //   It must not FilePath::ReferencesParent().
39  if (path.empty() || !base::IsStringUTF8(path) || path[0] != '/')
40    return false;
41  base::FilePath file_path = base::FilePath::FromUTF8Unsafe(path);
42  if (file_path.ReferencesParent())
43    return false;
44  return true;
45}
46
47bool IsValidExternalPath(const base::FilePath& path) {
48  return !path.empty() && !path.ReferencesParent();
49}
50
51void NormalizeInternalPath(std::string* path) {
52  if (path->size() > 1 && path->at(path->size() - 1) == '/')
53    path->erase(path->size() - 1, 1);
54}
55
56}  // namespace ppapi
57