The Tor Browser: comparison ipc/chromium/src/base/file

--1:000000000000
+:7722e033c38d
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include <fstream>
+#include "base/file_path.h"
+#include "base/logging.h"
+// These includes are just for the *Hack functions, and should be removed
+// when those functions are removed.
+#include "base/string_piece.h"
+#include "base/string_util.h"
+#include "base/sys_string_conversions.h"
+#if defined(FILE_PATH_USES_WIN_SEPARATORS)
+const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("\\/");
+#else  // FILE_PATH_USES_WIN_SEPARATORS
+const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("/");
+#endif  // FILE_PATH_USES_WIN_SEPARATORS
+const FilePath::CharType FilePath::kCurrentDirectory[] = FILE_PATH_LITERAL(".");
+const FilePath::CharType FilePath::kParentDirectory[] = FILE_PATH_LITERAL("..");
+const FilePath::CharType FilePath::kExtensionSeparator = FILE_PATH_LITERAL('.');
+namespace {
+// If this FilePath contains a drive letter specification, returns the
+// position of the last character of the drive letter specification,
+// otherwise returns npos.  This can only be true on Windows, when a pathname
+// begins with a letter followed by a colon.  On other platforms, this always
+// returns npos.
+FilePath::StringType::size_type FindDriveLetter(
+const FilePath::StringType& path) {
+#if defined(FILE_PATH_USES_DRIVE_LETTERS)
+// This is dependent on an ASCII-based character set, but that's a
+// reasonable assumption.  iswalpha can be too inclusive here.
+if (path.length() >= 2 && path[1] == L':' &&
+((path[0] >= L'A' && path[0] <= L'Z') ||
+(path[0] >= L'a' && path[0] <= L'z'))) {
+return 1;
+}
+#endif  // FILE_PATH_USES_DRIVE_LETTERS
+return FilePath::StringType::npos;
+}
+bool IsPathAbsolute(const FilePath::StringType& path) {
+#if defined(FILE_PATH_USES_DRIVE_LETTERS)
+FilePath::StringType::size_type letter = FindDriveLetter(path);
+if (letter != FilePath::StringType::npos) {
+// Look for a separator right after the drive specification.
+return path.length() > letter + 1 &&
+FilePath::IsSeparator(path[letter + 1]);
+}
+// Look for a pair of leading separators.
+return path.length() > 1 &&
+FilePath::IsSeparator(path[0]) && FilePath::IsSeparator(path[1]);
+#else  // FILE_PATH_USES_DRIVE_LETTERS
+// Look for a separator in the first position.
+return path.length() > 0 && FilePath::IsSeparator(path[0]);
+#endif  // FILE_PATH_USES_DRIVE_LETTERS
+}
+}  // namespace
+bool FilePath::IsSeparator(CharType character) {
+for (size_t i = 0; i < arraysize(kSeparators) - 1; ++i) {
+if (character == kSeparators[i]) {
+return true;
+}
+}
+return false;
+}
+// libgen's dirname and basename aren't guaranteed to be thread-safe and aren't
+// guaranteed to not modify their input strings, and in fact are implemented
+// differently in this regard on different platforms.  Don't use them, but
+// adhere to their behavior.
+FilePath FilePath::DirName() const {
+FilePath new_path(path_);
+new_path.StripTrailingSeparatorsInternal();
+// The drive letter, if any, always needs to remain in the output.  If there
+// is no drive letter, as will always be the case on platforms which do not
+// support drive letters, letter will be npos, or -1, so the comparisons and
+// resizes below using letter will still be valid.
+StringType::size_type letter = FindDriveLetter(new_path.path_);
+StringType::size_type last_separator =
+new_path.path_.find_last_of(kSeparators, StringType::npos,
+arraysize(kSeparators) - 1);
+if (last_separator == StringType::npos) {
+// path_ is in the current directory.
+new_path.path_.resize(letter + 1);
+} else if (last_separator == letter + 1) {
+// path_ is in the root directory.
+new_path.path_.resize(letter + 2);
+} else if (last_separator == letter + 2 &&
+IsSeparator(new_path.path_[letter + 1])) {
+// path_ is in "//" (possibly with a drive letter); leave the double
+// separator intact indicating alternate root.
+new_path.path_.resize(letter + 3);
+} else if (last_separator != 0) {
+// path_ is somewhere else, trim the basename.
+new_path.path_.resize(last_separator);
+}
+new_path.StripTrailingSeparatorsInternal();
+if (!new_path.path_.length())
+new_path.path_ = kCurrentDirectory;
+return new_path;
+}
+FilePath FilePath::BaseName() const {
+FilePath new_path(path_);
+new_path.StripTrailingSeparatorsInternal();
+// The drive letter, if any, is always stripped.
+StringType::size_type letter = FindDriveLetter(new_path.path_);
+if (letter != StringType::npos) {
+new_path.path_.erase(0, letter + 1);
+}
+// Keep everything after the final separator, but if the pathname is only
+// one character and it's a separator, leave it alone.
+StringType::size_type last_separator =
+new_path.path_.find_last_of(kSeparators, StringType::npos,
+arraysize(kSeparators) - 1);
+if (last_separator != StringType::npos &&
+last_separator < new_path.path_.length() - 1) {
+new_path.path_.erase(0, last_separator + 1);
+}
+return new_path;
+}
+FilePath::StringType FilePath::Extension() const {
+// BaseName() calls StripTrailingSeparators, so cases like /foo.baz/// work.
+StringType base = BaseName().value();
+// Special case "." and ".."
+if (base == kCurrentDirectory || base == kParentDirectory)
+return StringType();
+const StringType::size_type last_dot = base.rfind(kExtensionSeparator);
+if (last_dot == StringType::npos)
+return StringType();
+return StringType(base, last_dot);
+}
+FilePath FilePath::RemoveExtension() const {
+StringType ext = Extension();
+// It's important to check Extension() since that verifies that the
+// kExtensionSeparator actually appeared in the last path component.
+if (ext.empty())
+return FilePath(path_);
+// Since Extension() verified that the extension is in fact in the last path
+// component, this substr will effectively strip trailing separators.
+const StringType::size_type last_dot = path_.rfind(kExtensionSeparator);
+return FilePath(path_.substr(0, last_dot));
+}
+FilePath FilePath::InsertBeforeExtension(const StringType& suffix) const {
+if (suffix.empty())
+return FilePath(path_);
+if (path_.empty())
+return FilePath();
+StringType base = BaseName().value();
+if (base.empty())
+return FilePath();
+if (*(base.end() - 1) == kExtensionSeparator) {
+// Special case "." and ".."
+if (base == kCurrentDirectory || base == kParentDirectory) {
+return FilePath();
+}
+}
+StringType ext = Extension();
+StringType ret = RemoveExtension().value();
+ret.append(suffix);
+ret.append(ext);
+return FilePath(ret);
+}
+FilePath FilePath::ReplaceExtension(const StringType& extension) const {
+if (path_.empty())
+return FilePath();
+StringType base = BaseName().value();
+if (base.empty())
+return FilePath();
+if (*(base.end() - 1) == kExtensionSeparator) {
+// Special case "." and ".."
+if (base == kCurrentDirectory || base == kParentDirectory) {
+return FilePath();
+}
+}
+FilePath no_ext = RemoveExtension();
+// If the new extension is "" or ".", then just remove the current extension.
+if (extension.empty() || extension == StringType(1, kExtensionSeparator))
+return no_ext;
+StringType str = no_ext.value();
+if (extension[0] != kExtensionSeparator)
+str.append(1, kExtensionSeparator);
+str.append(extension);
+return FilePath(str);
+}
+FilePath FilePath::Append(const StringType& component) const {
+DCHECK(!IsPathAbsolute(component));
+if (path_.compare(kCurrentDirectory) == 0) {
+// Append normally doesn't do any normalization, but as a special case,
+// when appending to kCurrentDirectory, just return a new path for the
+// component argument.  Appending component to kCurrentDirectory would
+// serve no purpose other than needlessly lengthening the path, and
+// it's likely in practice to wind up with FilePath objects containing
+// only kCurrentDirectory when calling DirName on a single relative path
+// component.
+return FilePath(component);
+}
+FilePath new_path(path_);
+new_path.StripTrailingSeparatorsInternal();
+// Don't append a separator if the path is empty (indicating the current
+// directory) or if the path component is empty (indicating nothing to
+// append).
+if (component.length() > 0 && new_path.path_.length() > 0) {
+// Don't append a separator if the path still ends with a trailing
+// separator after stripping (indicating the root directory).
+if (!IsSeparator(new_path.path_[new_path.path_.length() - 1])) {
+// Don't append a separator if the path is just a drive letter.
+if (FindDriveLetter(new_path.path_) + 1 != new_path.path_.length()) {
+new_path.path_.append(1, kSeparators[0]);
+}
+}
+}
+new_path.path_.append(component);
+return new_path;
+}
+FilePath FilePath::Append(const FilePath& component) const {
+return Append(component.value());
+}
+FilePath FilePath::AppendASCII(const std::string& component) const {
+DCHECK(IsStringASCII(component));
+#if defined(OS_WIN)
+return Append(ASCIIToWide(component));
+#elif defined(OS_POSIX)
+return Append(component);
+#endif
+}
+bool FilePath::IsAbsolute() const {
+return IsPathAbsolute(path_);
+}
+#if defined(OS_POSIX)
+// See file_path.h for a discussion of the encoding of paths on POSIX
+// platforms.  These *Hack() functions are not quite correct, but they're
+// only temporary while we fix the remainder of the code.
+// Remember to remove the #includes at the top when you remove these.
+// static
+FilePath FilePath::FromWStringHack(const std::wstring& wstring) {
+return FilePath(base::SysWideToNativeMB(wstring));
+}
+std::wstring FilePath::ToWStringHack() const {
+return base::SysNativeMBToWide(path_);
+}
+#elif defined(OS_WIN)
+// static
+FilePath FilePath::FromWStringHack(const std::wstring& wstring) {
+return FilePath(wstring);
+}
+std::wstring FilePath::ToWStringHack() const {
+return path_;
+}
+#endif
+void FilePath::OpenInputStream(std::ifstream& stream) const {
+stream.open(
+#ifndef __MINGW32__
+path_.c_str(),
+#else
+base::SysWideToNativeMB(path_).c_str(),
+#endif
+std::ios::in | std::ios::binary);
+}
+FilePath FilePath::StripTrailingSeparators() const {
+FilePath new_path(path_);
+new_path.StripTrailingSeparatorsInternal();
+return new_path;
+}
+void FilePath::StripTrailingSeparatorsInternal() {
+// If there is no drive letter, start will be 1, which will prevent stripping
+// the leading separator if there is only one separator.  If there is a drive
+// letter, start will be set appropriately to prevent stripping the first
+// separator following the drive letter, if a separator immediately follows
+// the drive letter.
+StringType::size_type start = FindDriveLetter(path_) + 2;
+StringType::size_type last_stripped = StringType::npos;
+for (StringType::size_type pos = path_.length();
+pos > start && IsSeparator(path_[pos - 1]);
+--pos) {
+// If the string only has two separators and they're at the beginning,
+// don't strip them, unless the string began with more than two separators.
+if (pos != start + 1 || last_stripped == start + 2 ||
+!IsSeparator(path_[start - 1])) {
+path_.resize(pos - 1);
+last_stripped = pos;
+}
+}
+}

The Tor Browser / file comparison

comparison: ipc/chromium/src/base/file_path.cc

ipc/chromium/src/base/file_path.cc