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.cc

@@ -0,0 +1,251 @@
+/*
+ *  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.
+ */
+
+#if defined(WEBRTC_WIN)
+#include "webrtc/base/win32.h"
+#include <shellapi.h>
+#include <shlobj.h>
+#include <tchar.h>
+#endif  // WEBRTC_WIN 
+
+#include "webrtc/base/common.h"
+#include "webrtc/base/fileutils.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/base/pathutils.h"
+#include "webrtc/base/stringutils.h"
+#include "webrtc/base/urlencode.h"
+
+namespace rtc {
+
+static const char EMPTY_STR[] = "";
+
+// EXT_DELIM separates a file basename from extension
+const char EXT_DELIM = '.';
+
+// FOLDER_DELIMS separate folder segments and the filename
+const char* const FOLDER_DELIMS = "/\\";
+
+// DEFAULT_FOLDER_DELIM is the preferred delimiter for this platform
+#if WEBRTC_WIN
+const char DEFAULT_FOLDER_DELIM = '\\';
+#else  // !WEBRTC_WIN 
+const char DEFAULT_FOLDER_DELIM = '/';
+#endif  // !WEBRTC_WIN 
+
+///////////////////////////////////////////////////////////////////////////////
+// Pathname - parsing of pathnames into components, and vice versa
+///////////////////////////////////////////////////////////////////////////////
+
+bool Pathname::IsFolderDelimiter(char ch) {
+  return (NULL != ::strchr(FOLDER_DELIMS, ch));
+}
+
+char Pathname::DefaultFolderDelimiter() {
+  return DEFAULT_FOLDER_DELIM;
+}
+
+Pathname::Pathname()
+    : folder_delimiter_(DEFAULT_FOLDER_DELIM) {
+}
+
+Pathname::Pathname(const std::string& pathname)
+    : folder_delimiter_(DEFAULT_FOLDER_DELIM) {
+  SetPathname(pathname);
+}
+
+Pathname::Pathname(const std::string& folder, const std::string& filename)
+    : folder_delimiter_(DEFAULT_FOLDER_DELIM) {
+  SetPathname(folder, filename);
+}
+
+void Pathname::SetFolderDelimiter(char delimiter) {
+  ASSERT(IsFolderDelimiter(delimiter));
+  folder_delimiter_ = delimiter;
+}
+
+void Pathname::Normalize() {
+  for (size_t i=0; i<folder_.length(); ++i) {
+    if (IsFolderDelimiter(folder_[i])) {
+      folder_[i] = folder_delimiter_;
+    }
+  }
+}
+
+void Pathname::clear() {
+  folder_.clear();
+  basename_.clear();
+  extension_.clear();
+}
+
+bool Pathname::empty() const {
+  return folder_.empty() && basename_.empty() && extension_.empty();
+}
+
+std::string Pathname::pathname() const {
+  std::string pathname(folder_);
+  pathname.append(basename_);
+  pathname.append(extension_);
+  if (pathname.empty()) {
+    // Instead of the empty pathname, return the current working directory.
+    pathname.push_back('.');
+    pathname.push_back(folder_delimiter_);
+  }
+  return pathname;
+}
+
+std::string Pathname::url() const {
+  std::string s = "file:///";
+  for (size_t i=0; i<folder_.length(); ++i) {
+    if (IsFolderDelimiter(folder_[i]))
+      s += '/';
+    else
+      s += folder_[i];
+  }
+  s += basename_;
+  s += extension_;
+  return UrlEncodeStringForOnlyUnsafeChars(s);
+}
+
+void Pathname::SetPathname(const std::string& pathname) {
+  std::string::size_type pos = pathname.find_last_of(FOLDER_DELIMS);
+  if (pos != std::string::npos) {
+    SetFolder(pathname.substr(0, pos + 1));
+    SetFilename(pathname.substr(pos + 1));
+  } else {
+    SetFolder(EMPTY_STR);
+    SetFilename(pathname);
+  }
+}
+
+void Pathname::SetPathname(const std::string& folder,
+                           const std::string& filename) {
+  SetFolder(folder);
+  SetFilename(filename);
+}
+
+void Pathname::AppendPathname(const std::string& pathname) {
+  std::string full_pathname(folder_);
+  full_pathname.append(pathname);
+  SetPathname(full_pathname);
+}
+
+std::string Pathname::folder() const {
+  return folder_;
+}
+
+std::string Pathname::folder_name() const {
+  std::string::size_type pos = std::string::npos;
+  if (folder_.size() >= 2) {
+    pos = folder_.find_last_of(FOLDER_DELIMS, folder_.length() - 2);
+  }
+  if (pos != std::string::npos) {
+    return folder_.substr(pos + 1);
+  } else {
+    return folder_;
+  }
+}
+
+std::string Pathname::parent_folder() const {
+  std::string::size_type pos = std::string::npos;
+  if (folder_.size() >= 2) {
+    pos = folder_.find_last_of(FOLDER_DELIMS, folder_.length() - 2);
+  }
+  if (pos != std::string::npos) {
+    return folder_.substr(0, pos + 1);
+  } else {
+    return EMPTY_STR;
+  }
+}
+
+void Pathname::SetFolder(const std::string& folder) {
+  folder_.assign(folder);
+  // Ensure folder ends in a path delimiter
+  if (!folder_.empty() && !IsFolderDelimiter(folder_[folder_.length()-1])) {
+    folder_.push_back(folder_delimiter_);
+  }
+}
+
+void Pathname::AppendFolder(const std::string& folder) {
+  folder_.append(folder);
+  // Ensure folder ends in a path delimiter
+  if (!folder_.empty() && !IsFolderDelimiter(folder_[folder_.length()-1])) {
+    folder_.push_back(folder_delimiter_);
+  }
+}
+
+std::string Pathname::basename() const {
+  return basename_;
+}
+
+bool Pathname::SetBasename(const std::string& basename) {
+  if(basename.find_first_of(FOLDER_DELIMS) != std::string::npos) {
+    return false;
+  }
+  basename_.assign(basename);
+  return true;
+}
+
+std::string Pathname::extension() const {
+  return extension_;
+}
+
+bool Pathname::SetExtension(const std::string& extension) {
+  if (extension.find_first_of(FOLDER_DELIMS) != std::string::npos ||
+    extension.find_first_of(EXT_DELIM, 1) != std::string::npos) {
+      return false;
+  }
+  extension_.assign(extension);
+  // Ensure extension begins with the extension delimiter
+  if (!extension_.empty() && (extension_[0] != EXT_DELIM)) {
+    extension_.insert(extension_.begin(), EXT_DELIM);
+  }
+  return true;
+}
+
+std::string Pathname::filename() const {
+  std::string filename(basename_);
+  filename.append(extension_);
+  return filename;
+}
+
+bool Pathname::SetFilename(const std::string& filename) {
+  std::string::size_type pos = filename.rfind(EXT_DELIM);
+  if ((pos == std::string::npos) || (pos == 0)) {
+    return SetExtension(EMPTY_STR) && SetBasename(filename);
+  } else {
+    return SetExtension(filename.substr(pos)) && SetBasename(filename.substr(0, pos));
+  }
+}
+
+#if defined(WEBRTC_WIN)
+bool Pathname::GetDrive(char *drive, uint32 bytes) const {
+  return GetDrive(drive, bytes, folder_);
+}
+
+// static
+bool Pathname::GetDrive(char *drive, uint32 bytes,
+                        const std::string& pathname) {
+  // need at lease 4 bytes to save c:
+  if (bytes < 4 || pathname.size() < 3) {
+    return false;
+  }
+
+  memcpy(drive, pathname.c_str(), 3);
+  drive[3] = 0;
+  // sanity checking
+  return (isalpha(drive[0]) &&
+          drive[1] == ':' &&
+          drive[2] == '\\');
+}
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+
+} // namespace rtc