封装了一些文件操作的接口，使用的是boost库里面的文件操作，封装的好处是以后即使不用boost库也不至于影响使用者。
namespace FileUtils { /// Return true if given file or directory exists. LPPAPI bool fileExists(const String& path); /// Return file last modified date and time. LPPAPI uint64_t fileModified(const String& path); /// Set file last modified date and time to now. LPPAPI bool touchFile(const String& path); /// Return file length in bytes. LPPAPI int64_t fileLength(const String& path); /// Set new file length, truncating or expanding as required. LPPAPI bool setFileLength(const String& path, int64_t length); /// Delete file from file system. LPPAPI bool removeFile(const String& path); /// Copy a file to/from file system. LPPAPI bool copyFile(const String& source, const String& dest); /// Create new directory under given location. LPPAPI bool createDirectory(const String& path); /// Delete directory from file system. LPPAPI bool removeDirectory(const String& path); /// Return true if given path points to a directory. LPPAPI bool isDirectory(const String& path); /// Return list of files (and/or directories) under given directory. /// @param path path to list directory. /// @param filesOnly if true the exclude sub-directories. /// @param dirList list of files to return. LPPAPI bool listDirectory(const String& path, bool filesOnly, HashSet<String> dirList); /// Copy a directory to/from file system. LPPAPI bool copyDirectory(const String& source, const String& dest); /// Return complete path after joining given directory and file name. LPPAPI String joinPath(const String& path, const String& file); /// Extract parent path from given path. LPPAPI String extractPath(const String& path); /// Extract file name from given path. LPPAPI String extractFile(const String& path); }
