gtest/internal/gtest-filepath.h

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// Author: keith.ray (at) gmail.com (Keith Ray)
//
// Google Test filepath utilities
//
// This header file declares classes and functions used internally by
// Google Test.  They are subject to change without notice.
//
// This file is #included in testing/base/internal/gtest-internal.h
// Do not include this header file separately!

#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_

#include <gtest/internal/gtest-string.h>

namespace testing {
namespace internal {

// FilePath - a class for file and directory pathname manipulation which
// handles platform-specific conventions (like the pathname separator).
// Used for helper functions for naming files in a directory for xml output.
// Except for Set methods, all methods are const or static, which provides an
// "immutable value object" -- useful for peace of mind.
// A FilePath with a value ending in a path separator ("like/this/") represents
// a directory, otherwise it is assumed to represent a file. In either case,
// it may or may not represent an actual file or directory in the file system.
// Names are NOT checked for syntax correctness -- no checking for illegal
// characters, malformed paths, etc.

class FilePath {
 public:
  FilePath() : pathname_("") { }
  FilePath(const FilePath& rhs) : pathname_(rhs.pathname_) { }
  explicit FilePath(const char* pathname) : pathname_(pathname) { }
  explicit FilePath(const String& pathname) : pathname_(pathname) { }

  void Set(const FilePath& rhs) {
    pathname_ = rhs.pathname_;
  }

  String ToString() const { return pathname_; }
  const char* c_str() const { return pathname_.c_str(); }

  // Given directory = "dir", base_name = "test", number = 0,
  // extension = "xml", returns "dir/test.xml". If number is greater
  // than zero (e.g., 12), returns "dir/test_12.xml".
  // On Windows platform, uses \ as the separator rather than /.
  static FilePath MakeFileName(const FilePath& directory,
                               const FilePath& base_name,
                               int number,
                               const char* extension);

  // Returns a pathname for a file that does not currently exist. The pathname
  // will be directory/base_name.extension or
  // directory/base_name_<number>.extension if directory/base_name.extension
  // already exists. The number will be incremented until a pathname is found
  // that does not already exist.
  // Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
  // There could be a race condition if two or more processes are calling this
  // function at the same time -- they could both pick the same filename.
  static FilePath GenerateUniqueFileName(const FilePath& directory,
                                         const FilePath& base_name,
                                         const char* extension);

  // If input name has a trailing separator character, removes it and returns
  // the name, otherwise return the name string unmodified.
  // On Windows platform, uses \ as the separator, other platforms use /.
  FilePath RemoveTrailingPathSeparator() const;

  // Returns a copy of the FilePath with the directory part removed.
  // Example: FilePath("path/to/file").RemoveDirectoryName() returns
  // FilePath("file"). If there is no directory part ("just_a_file"), it returns
  // the FilePath unmodified. If there is no file part ("just_a_dir/") it
  // returns an empty FilePath ("").
  // On Windows platform, '\' is the path separator, otherwise it is '/'.
  FilePath RemoveDirectoryName() const;

  // RemoveFileName returns the directory path with the filename removed.
  // Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
  // If the FilePath is "a_file" or "/a_file", RemoveFileName returns
  // FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
  // not have a file, like "just/a/dir/", it returns the FilePath unmodified.
  // On Windows platform, '\' is the path separator, otherwise it is '/'.
  FilePath RemoveFileName() const;

  // Returns a copy of the FilePath with the case-insensitive extension removed.
  // Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
  // FilePath("dir/file"). If a case-insensitive extension is not
  // found, returns a copy of the original FilePath.
  FilePath RemoveExtension(const char* extension) const;

  // Creates directories so that path exists. Returns true if successful or if
  // the directories already exist; returns false if unable to create
  // directories for any reason. Will also return false if the FilePath does
  // not represent a directory (that is, it doesn't end with a path separator).
  bool CreateDirectoriesRecursively() const;

  // Create the directory so that path exists. Returns true if successful or
  // if the directory already exists; returns false if unable to create the
  // directory for any reason, including if the parent directory does not
  // exist. Not named "CreateDirectory" because that's a macro on Windows.
  bool CreateFolder() const;

  // Returns true if FilePath describes something in the file-system,
  // either a file, directory, or whatever, and that something exists.
  bool FileOrDirectoryExists() const;

  // Returns true if pathname describes a directory in the file-system
  // that exists.
  bool DirectoryExists() const;

  // Returns true if FilePath ends with a path separator, which indicates that
  // it is intended to represent a directory. Returns false otherwise.
  // This does NOT check that a directory (or file) actually exists.
  bool IsDirectory() const;

 private:
  String pathname_;

  // Don't implement operator= because it is banned by the style guide.
  FilePath& operator=(const FilePath& rhs);
};  // class FilePath

}  // namespace internal
}  // namespace testing

#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_