Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/pathutils.h

@@ -0,0 +1,163 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_BASE_PATHUTILS_H__
+#define WEBRTC_BASE_PATHUTILS_H__
+
+#include <string>
+// Temporary, until deprecated helpers are removed.
+#include "webrtc/base/fileutils.h"
+
+namespace rtc {
+
+///////////////////////////////////////////////////////////////////////////////
+// Pathname - parsing of pathnames into components, and vice versa.
+//
+// To establish consistent terminology, a filename never contains a folder
+// component.  A folder never contains a filename.  A pathname may include
+// a folder and/or filename component.  Here are some examples:
+//
+//   pathname()      /home/john/example.txt
+//   folder()        /home/john/
+//   filename()                 example.txt
+//   parent_folder() /home/
+//   folder_name()         john/
+//   basename()                 example
+//   extension()                       .txt
+//
+// Basename may begin, end, and/or include periods, but no folder delimiters.
+// If extension exists, it consists of a period followed by zero or more
+// non-period/non-delimiter characters, and basename is non-empty.
+///////////////////////////////////////////////////////////////////////////////
+
+class Pathname {
+public:
+  // Folder delimiters are slash and backslash
+  static bool IsFolderDelimiter(char ch);
+  static char DefaultFolderDelimiter();
+
+  Pathname();
+  Pathname(const std::string& pathname);
+  Pathname(const std::string& folder, const std::string& filename);
+
+  // Set's the default folder delimiter for this Pathname
+  char folder_delimiter() const { return folder_delimiter_; }
+  void SetFolderDelimiter(char delimiter);
+
+  // Normalize changes all folder delimiters to folder_delimiter()
+  void Normalize();
+
+  // Reset to the empty pathname
+  void clear();
+
+  // Returns true if the pathname is empty.  Note: this->pathname().empty()
+  // is always false.
+  bool empty() const;
+
+  std::string url() const;
+
+  // Returns the folder and filename components.  If the pathname is empty,
+  // returns a string representing the current directory (as a relative path,
+  // i.e., ".").
+  std::string pathname() const;
+  void SetPathname(const std::string& pathname);
+  void SetPathname(const std::string& folder, const std::string& filename);
+
+  // Append pathname to the current folder (if any).  Any existing filename
+  // will be discarded.
+  void AppendPathname(const std::string& pathname);
+
+  std::string folder() const;
+  std::string folder_name() const;
+  std::string parent_folder() const;
+  // SetFolder and AppendFolder will append a folder delimiter, if needed.
+  void SetFolder(const std::string& folder);
+  void AppendFolder(const std::string& folder);
+
+  std::string basename() const;
+  bool SetBasename(const std::string& basename);
+
+  std::string extension() const;
+  // SetExtension will prefix a period, if needed.
+  bool SetExtension(const std::string& extension);
+
+  std::string filename() const;
+  bool SetFilename(const std::string& filename);
+
+#if defined(WEBRTC_WIN)
+  bool GetDrive(char *drive, uint32 bytes) const;
+  static bool GetDrive(char *drive, uint32 bytes,const std::string& pathname);
+#endif
+
+private:
+  std::string folder_, basename_, extension_;
+  char folder_delimiter_;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Global Helpers (deprecated)
+///////////////////////////////////////////////////////////////////////////////
+
+inline void SetOrganizationName(const std::string& organization) {
+  Filesystem::SetOrganizationName(organization);
+}
+inline void SetApplicationName(const std::string& application) {
+  Filesystem::SetApplicationName(application);
+}
+inline void GetOrganizationName(std::string* organization) {
+  Filesystem::GetOrganizationName(organization);
+}
+inline void GetApplicationName(std::string* application) {
+  Filesystem::GetApplicationName(application);
+}
+inline bool CreateFolder(const Pathname& path) {
+  return Filesystem::CreateFolder(path);
+}
+inline bool FinishPath(Pathname& path, bool create, const std::string& append) {
+  if (!append.empty())
+    path.AppendFolder(append);
+  return !create || CreateFolder(path);
+}
+// Note: this method uses the convention of <temp>/<appname> for the temporary
+// folder.  Filesystem uses <temp>/<exename>.  We will be migrating exclusively
+// to <temp>/<orgname>/<appname> eventually.  Since these are temp folders,
+// it's probably ok to orphan them during the transition.
+inline bool GetTemporaryFolder(Pathname& path, bool create,
+                               const std::string& append) {
+  std::string application_name;
+  Filesystem::GetApplicationName(&application_name);
+  ASSERT(!application_name.empty());
+  return Filesystem::GetTemporaryFolder(path, create, &application_name)
+         && FinishPath(path, create, append);
+}
+inline bool GetAppDataFolder(Pathname& path, bool create,
+                             const std::string& append) {
+  ASSERT(!create); // TODO: Support create flag on Filesystem::GetAppDataFolder.
+  return Filesystem::GetAppDataFolder(&path, true)
+         && FinishPath(path, create, append);
+}
+inline bool CleanupTemporaryFolder() {
+  Pathname path;
+  if (!GetTemporaryFolder(path, false, ""))
+    return false;
+  if (Filesystem::IsAbsent(path))
+    return true;
+  if (!Filesystem::IsTemporaryPath(path)) {
+    ASSERT(false);
+    return false;
+  }
+  return Filesystem::DeleteFolderContents(path);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+}  // namespace rtc
+
+#endif // WEBRTC_BASE_PATHUTILS_H__