ppapi/shared_impl/file_ref_util.cc

   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
  11 namespace ppapi {
  12
  13 std::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
  21 std::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
  34 bool 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
  47 bool IsValidExternalPath(const base::FilePath& path) {
  48   return !path.empty() && !path.ReferencesParent();
  49 }
  50
  51 void 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