interface/wx/filename.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        filename.h
   3 // Purpose:     interface of wxFileName
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9
  10 /**
  11     The various values for the path format: this mainly affects the path
  12     separator but also whether or not the path has the drive part
  13     (as under Windows).
  14
  15     See wxFileName for more info.
  16 */
  17 enum wxPathFormat
  18 {
  19     wxPATH_NATIVE = 0,      //!< the path format for the current platform.
  20     wxPATH_UNIX,
  21     wxPATH_BEOS = wxPATH_UNIX,
  22     wxPATH_MAC,
  23     wxPATH_DOS,
  24     wxPATH_WIN = wxPATH_DOS,
  25     wxPATH_OS2 = wxPATH_DOS,
  26     wxPATH_VMS,
  27
  28     wxPATH_MAX   //!< Not a valid value for specifying path format
  29 };
  30
  31 /**
  32     Different conventions for human readable sizes.
  33
  34     @see wxFileName::GetHumanReadableSize().
  35
  36     @since 2.9.1
  37 */
  38 enum wxSizeConvention
  39 {
  40     /// 1024 bytes = 1KB.
  41     wxSIZE_CONV_TRADITIONAL,
  42
  43     /// 1024 bytes = 1KiB.
  44     wxSIZE_CONV_IEC,
  45
  46     /// 1000 bytes = 1KB.
  47     wxSIZE_CONV_SI
  48 };
  49
  50
  51 /**
  52     The kind of normalization to do with the file name: these values can be
  53     or'd together to perform several operations at once.
  54     See wxFileName::Normalize() for more info.
  55 */
  56 enum wxPathNormalize
  57 {
  58     //! Replace environment variables with their values.
  59     //! wxFileName understands both Unix and Windows (but only under Windows) environment
  60     //! variables expansion: i.e. @c "$var", @c "$(var)" and @c "${var}" are always understood
  61     //! and in addition under Windows @c "%var%" is also.
  62     wxPATH_NORM_ENV_VARS = 0x0001,
  63
  64     wxPATH_NORM_DOTS     = 0x0002,  //!< Squeeze all @c ".." and @c ".".
  65     wxPATH_NORM_TILDE    = 0x0004,  //!< Replace @c "~" and @c "~user" (Unix only).
  66     wxPATH_NORM_CASE     = 0x0008,  //!< If the platform is case insensitive, make lowercase the path.
  67     wxPATH_NORM_ABSOLUTE = 0x0010,  //!< Make the path absolute.
  68     wxPATH_NORM_LONG =     0x0020,  //!< Expand the path to the "long" form (Windows only).
  69     wxPATH_NORM_SHORTCUT = 0x0040,  //!< Resolve the shortcut, if it is a shortcut (Windows only).
  70
  71     //! A value indicating all normalization flags except for @c wxPATH_NORM_CASE.
  72     wxPATH_NORM_ALL      = 0x00ff & ~wxPATH_NORM_CASE
  73 };
  74
  75 /**
  76     Flags for wxFileName::Rmdir().
  77  */
  78 enum
  79 {
  80     /// Delete the specified directory and its subdirectories if they are empty.
  81     wxPATH_RMDIR_FULL = 1,
  82
  83     /**
  84       Delete the specified directory and all the files and subdirectories in it
  85       recursively.
  86
  87       This flag is obviously @b dangerous and should be used with care and
  88       after asking the user for confirmation.
  89      */
  90     wxPATH_RMDIR_RECURSIVE = 2
  91 };
  92
  93 /**
  94     The return value of wxFileName::GetSize() in case of error.
  95 */
  96 wxULongLong wxInvalidSize;
  97
  98
  99 /**
 100     @class wxFileName
 101
 102     wxFileName encapsulates a file name.
 103
 104     This class serves two purposes: first, it provides the functions to split the
 105     file names into components and to recombine these components in the full file
 106     name which can then be passed to the OS file functions
 107     (and @ref group_funcmacro_file "wxWidgets functions" wrapping them).
 108     Second, it includes the functions for working with the files itself. Note that
 109     to change the file data you should use wxFile class instead.
 110     wxFileName provides functions for working with the file attributes.
 111
 112     When working with directory names (i.e. without filename and extension)
 113     make sure not to misuse the file name part of this class with the last
 114     directory. Instead initialize the wxFileName instance like this:
 115
 116     @code
 117     wxFileName dirname( "C:\mydir", "" );
 118     MyMethod( dirname.GetPath() );
 119     @endcode
 120
 121     The same can be done using the static method wxFileName::DirName():
 122
 123     @code
 124     wxFileName dirname = wxFileName::DirName( "C:\mydir" );
 125     MyMethod( dirname.GetPath() );
 126     @endcode
 127
 128     Accordingly, methods dealing with directories or directory names like
 129     wxFileName::IsDirReadable() use wxFileName::GetPath() whereas methods dealing
 130     with file names like wxFileName::IsFileReadable() use wxFileName::GetFullPath().
 131
 132     If it is not known whether a string contains a directory name or a complete
 133     file name (such as when interpreting user input) you need to use the static
 134     function wxFileName::DirExists() (or its identical variants wxDir::Exists() and
 135     wxDirExists()) and construct the wxFileName instance accordingly.
 136     This will only work if the directory actually exists, of course:
 137
 138     @code
 139     wxString user_input;
 140     // get input from user
 141
 142     wxFileName fname;
 143     if (wxDirExists(user_input))
 144         fname.AssignDir( user_input );
 145     else
 146         fname.Assign( user_input );
 147     @endcode
 148
 149     Please note that many wxFileName methods accept the path format argument
 150     which is by @c wxPATH_NATIVE by default meaning to use the path format
 151     native for the current platform.
 152     The path format affects the operation of wxFileName functions in several ways:
 153     first and foremost, it defines the path separator character to use, but it
 154     also affects other things such as whether the path has the drive part or not.
 155     See wxPathFormat for more info.
 156
 157
 158     @section filename_format File name format
 159
 160     wxFileName currently supports the file names in the Unix, DOS/Windows,
 161     Mac OS and VMS formats. Although these formats are quite different,
 162     wxFileName tries to treat them all in the same generic way.
 163     It supposes that all file names consist of the following parts: the volume
 164     (also known as drive under Windows or device under VMS), the path which is
 165     a sequence of directory names separated by the path separators and the full
 166     filename itself which, in turn, is composed from the base file name and the
 167     extension. All of the individual components of the file name may be empty
 168     and, for example, the volume name is always empty under Unix, but if they
 169     are all empty simultaneously, the filename object is considered to be in an
 170     invalid state and wxFileName::IsOk() returns false for it.
 171
 172     File names can be case-sensitive or not, the function wxFileName::IsCaseSensitive()
 173     allows to determine this. The rules for determining whether the file name is
 174     absolute or relative also depend on the file name format and the only portable way
 175     to answer this question is to use wxFileName::IsAbsolute() or wxFileName::IsRelative()
 176     method.
 177
 178     Note that on Windows,"X:" refers to the current working directory on drive X.
 179     Therefore, a wxFileName instance constructed from for example "X:dir/file.ext"
 180     treats the portion beyond drive separator as being relative to that directory.
 181     To ensure that the filename is absolute, you may use wxFileName::MakeAbsolute().
 182     There is also an inverse function wxFileName::MakeRelativeTo() which undoes
 183     what wxFileName::Normalize(wxPATH_NORM_DOTS) does.
 184     Other functions returning information about the file format provided by this
 185     class are wxFileName::GetVolumeSeparator(), wxFileName::IsPathSeparator().
 186
 187
 188     @section filename_construction File name construction
 189
 190     You can initialize a wxFileName instance using one of the following functions:
 191
 192     @li wxFileName::wxFileName()
 193     @li wxFileName::Assign()
 194     @li wxFileName::AssignCwd()
 195     @li wxFileName::AssignDir()
 196     @li wxFileName::AssignHomeDir()
 197     @li wxFileName::AssignTempFileName()
 198     @li wxFileName::DirName()
 199     @li wxFileName::FileName()
 200     @li wxFileName::operator=()
 201
 202
 203     @section filename_tests File name tests
 204
 205     Before doing other tests, you should use wxFileName::IsOk() to verify that
 206     the filename is well defined. If it is, FileExists() can be used to test whether
 207     a file with such name exists and wxFileName::DirExists() can be used to test
 208     for directory existence.
 209     File names should be compared using the wxFileName::SameAs() method or
 210     wxFileName::operator==(). For testing basic access modes, you can use:
 211
 212     @li wxFileName::IsDirWritable()
 213     @li wxFileName::IsDirReadable()
 214     @li wxFileName::IsFileWritable()
 215     @li wxFileName::IsFileReadable()
 216     @li wxFileName::IsFileExecutable()
 217
 218
 219     @section filename_components File name components
 220
 221     These functions allow to examine and modify the individual directories
 222     of the path:
 223
 224     @li wxFileName::AppendDir()
 225     @li wxFileName::InsertDir()
 226     @li wxFileName::GetDirCount()
 227     @li wxFileName::PrependDir()
 228     @li wxFileName::RemoveDir()
 229     @li wxFileName::RemoveLastDir()
 230
 231     To change the components of the file name individually you can use the
 232     following functions:
 233
 234     @li wxFileName::GetExt()
 235     @li wxFileName::GetName()
 236     @li wxFileName::GetVolume()
 237     @li wxFileName::HasExt()
 238     @li wxFileName::HasName()
 239     @li wxFileName::HasVolume()
 240     @li wxFileName::SetExt()
 241     @li wxFileName::ClearExt()
 242     @li wxFileName::SetEmptyExt()
 243     @li wxFileName::SetName()
 244     @li wxFileName::SetVolume()
 245
 246     You can initialize a wxFileName instance using one of the following functions:
 247
 248
 249     @section filename_operations File name operations
 250
 251     These methods allow to work with the file creation, access and modification
 252     times. Note that not all filesystems under all platforms implement these times
 253     in the same way. For example, the access time under Windows has a resolution of
 254     one day (so it is really the access date and not time). The access time may be
 255     updated when the file is executed or not depending on the platform.
 256
 257     @li wxFileName::GetModificationTime()
 258     @li wxFileName::GetTimes()
 259     @li wxFileName::SetTimes()
 260     @li wxFileName::Touch()
 261
 262     Other file system operations functions are:
 263
 264     @li wxFileName::Mkdir()
 265     @li wxFileName::Rmdir()
 266
 267
 268     @library{wxbase}
 269     @category{file}
 270 */
 271 class wxFileName
 272 {
 273 public:
 274     /**
 275         Default constructor.
 276     */
 277     wxFileName();
 278
 279     /**
 280         Copy constructor.
 281     */
 282     wxFileName(const wxFileName& filename);
 283
 284     /**
 285         Constructor taking a full filename.
 286
 287         If it terminates with a '/', a directory path is constructed
 288         (the name will be empty), otherwise a file name and extension
 289         are extracted from it.
 290     */
 291     wxFileName(const wxString& fullpath,
 292                wxPathFormat format = wxPATH_NATIVE);
 293
 294     /**
 295         Constructor a directory name and file name.
 296     */
 297     wxFileName(const wxString& path, const wxString& name,
 298                wxPathFormat format = wxPATH_NATIVE);
 299
 300     /**
 301         Constructor from a directory name, base file name and extension.
 302     */
 303     wxFileName(const wxString& path, const wxString& name,
 304                const wxString& ext,
 305                wxPathFormat format = wxPATH_NATIVE);
 306
 307     /**
 308         Constructor from a volume name, a directory name, base file name and extension.
 309     */
 310     wxFileName(const wxString& volume, const wxString& path,
 311                const wxString& name,
 312                const wxString& ext,
 313                wxPathFormat format = wxPATH_NATIVE);
 314
 315     /**
 316         Appends a directory component to the path. This component should contain a
 317         single directory name level, i.e. not contain any path or volume separators nor
 318         should it be empty, otherwise the function does nothing (and generates an
 319         assert failure in debug build).
 320     */
 321     void AppendDir(const wxString& dir);
 322
 323     /**
 324         Creates the file name from another filename object.
 325     */
 326     void Assign(const wxFileName& filepath);
 327
 328     /**
 329         Creates the file name from a full file name with a path.
 330     */
 331     void Assign(const wxString& fullpath,
 332                 wxPathFormat format = wxPATH_NATIVE);
 333
 334     /**
 335         Creates the file name from volume, path, name and extension.
 336     */
 337     void Assign(const wxString& volume, const wxString& path,
 338                 const wxString& name,
 339                 const wxString& ext,
 340                 bool hasExt,
 341                 wxPathFormat format = wxPATH_NATIVE);
 342
 343     /**
 344         Creates the file name from volume, path, name and extension.
 345     */
 346     void Assign(const wxString& volume, const wxString& path,
 347                 const wxString& name,
 348                 const wxString& ext,
 349                 wxPathFormat format = wxPATH_NATIVE);
 350
 351     /**
 352         Creates the file name from file path and file name.
 353     */
 354     void Assign(const wxString& path, const wxString& name,
 355                 wxPathFormat format = wxPATH_NATIVE);
 356
 357     /**
 358         Creates the file name from path, name and extension.
 359     */
 360     void Assign(const wxString& path, const wxString& name,
 361                 const wxString& ext,
 362                 wxPathFormat format = wxPATH_NATIVE);
 363
 364     /**
 365         Makes this object refer to the current working directory on the specified
 366         volume (or current volume if @a volume is empty).
 367
 368         @see GetCwd()
 369     */
 370     void AssignCwd(const wxString& volume = wxEmptyString);
 371
 372     /**
 373         Sets this file name object to the given directory name.
 374         The name and extension will be empty.
 375     */
 376     void AssignDir(const wxString& dir,
 377                    wxPathFormat format = wxPATH_NATIVE);
 378
 379     /**
 380         Sets this file name object to the home directory.
 381     */
 382     void AssignHomeDir();
 383
 384     /**
 385         The function calls CreateTempFileName() to create a temporary file
 386         and sets this object to the name of the file.
 387
 388         If a temporary file couldn't be created, the object is put into
 389         an invalid state (see IsOk()).
 390     */
 391     void AssignTempFileName(const wxString& prefix);
 392
 393     /**
 394         The function calls CreateTempFileName() to create a temporary
 395         file name and open @a fileTemp with it.
 396
 397         If the file couldn't be opened, the object is put into
 398         an invalid state (see IsOk()).
 399     */
 400     void AssignTempFileName(const wxString& prefix, wxFile* fileTemp);
 401
 402     /**
 403         The function calls CreateTempFileName() to create a temporary
 404         file name and open @a fileTemp with it.
 405
 406         If the file couldn't be opened, the object is put into
 407         an invalid state (see IsOk()).
 408     */
 409     void AssignTempFileName(const wxString& prefix, wxFFile* fileTemp);
 410
 411     /**
 412         Reset all components to default, uninitialized state.
 413     */
 414     void Clear();
 415
 416     /**
 417         Removes the extension from the file name resulting in a
 418         file name with no trailing dot.
 419
 420         @see SetExt(), SetEmptyExt()
 421     */
 422     void ClearExt();
 423
 424     //@{
 425     /**
 426         Returns a temporary file name starting with the given @e prefix.
 427         If the @a prefix is an absolute path, the temporary file is created in this
 428         directory, otherwise it is created in the default system directory for the
 429         temporary files or in the current directory.
 430
 431         If the function succeeds, the temporary file is actually created.
 432         If @a fileTemp is not @NULL, this file will be opened using the name of
 433         the temporary file. When possible, this is done in an atomic way ensuring that
 434         no race condition occurs between the temporary file name generation and opening
 435         it which could often lead to security compromise on the multiuser systems.
 436         If @a fileTemp is @NULL, the file is only created, but not opened.
 437         Under Unix, the temporary file will have read and write permissions for the
 438         owner only to minimize the security problems.
 439
 440         @param prefix
 441             Prefix to use for the temporary file name construction
 442         @param fileTemp
 443             The file to open or @NULL to just get the name
 444
 445         @return The full temporary file name or an empty string on error.
 446     */
 447     static wxString CreateTempFileName(const wxString& prefix,
 448                                        wxFile* fileTemp = NULL);
 449     static wxString CreateTempFileName(const wxString& prefix,
 450                                        wxFFile* fileTemp = NULL);
 451     //@}
 452
 453     /**
 454         Returns @true if the directory with this name exists.
 455     */
 456     bool DirExists() const;
 457
 458     /**
 459         Returns @true if the directory with name @a dir exists.
 460     */
 461     static bool DirExists(const wxString& dir);
 462
 463     /**
 464         Returns the object corresponding to the directory with the given name.
 465         The @a dir parameter may have trailing path separator or not.
 466     */
 467     static wxFileName DirName(const wxString& dir,
 468                               wxPathFormat format = wxPATH_NATIVE);
 469
 470     /**
 471         Returns @true if the file with this name exists.
 472
 473         @see DirExists()
 474     */
 475     bool FileExists() const;
 476
 477     /**
 478         Returns @true if the file with name @a file exists.
 479
 480         @see DirExists()
 481     */
 482     static bool FileExists(const wxString& file);
 483
 484     /**
 485         Returns the file name object corresponding to the given @e file. This
 486         function exists mainly for symmetry with DirName().
 487     */
 488     static wxFileName FileName(const wxString& file,
 489                                wxPathFormat format = wxPATH_NATIVE);
 490
 491     /**
 492         Retrieves the value of the current working directory on the specified volume.
 493         If the volume is empty, the program's current working directory is returned for
 494         the current volume.
 495
 496         @return The string containing the current working directory or an empty
 497                 string on error.
 498
 499         @see AssignCwd()
 500     */
 501     static wxString GetCwd(const wxString& volume = wxEmptyString);
 502
 503     /**
 504         Returns the number of directories in the file name.
 505     */
 506     size_t GetDirCount() const;
 507
 508     /**
 509         Returns the directories in string array form.
 510     */
 511     const wxArrayString& GetDirs() const;
 512
 513     /**
 514         Returns the file name extension.
 515     */
 516     wxString GetExt() const;
 517
 518     /**
 519         Returns the characters that can't be used in filenames and directory names
 520         for the specified format.
 521     */
 522     static wxString GetForbiddenChars(wxPathFormat format = wxPATH_NATIVE);
 523
 524     /**
 525         Returns the canonical path format for this platform.
 526     */
 527     static wxPathFormat GetFormat(wxPathFormat format = wxPATH_NATIVE);
 528
 529     /**
 530         Returns the full name (including extension but excluding directories).
 531     */
 532     wxString GetFullName() const;
 533
 534     /**
 535         Returns the full path with name and extension.
 536     */
 537     wxString GetFullPath(wxPathFormat format = wxPATH_NATIVE) const;
 538
 539     /**
 540         Returns the home directory.
 541     */
 542     static wxString GetHomeDir();
 543
 544     //@{
 545     /**
 546         Returns the representation of the file size in a human-readable form.
 547
 548         In the first version, the size of this file is used. In the second one,
 549         the specified size @a bytes is used.
 550
 551         If the file size could not be retrieved or @a bytes is ::wxInvalidSize
 552         or zero, the @c failmsg string is returned.
 553
 554         Otherwise the returned string is a floating-point number with @c
 555         precision decimal digits followed by the abbreviation of the unit used.
 556         By default the traditional, although incorrect, convention of using SI
 557         units for multiples of 1024 is used, i.e. returned string will use
 558         suffixes of B, KB, MB, GB, TB for bytes, kilobytes, megabytes,
 559         gigabytes and terabytes respectively. With the IEC convention the names
 560         of the units are changed to B, KiB, MiB, GiB and TiB for bytes,
 561         kibibytes, mebibytes, gibibytes and tebibytes. Finally, with SI
 562         convention the same B, KB, MB, GB and TB suffixes are used but in their
 563         correct SI meaning, i.e. as multiples of 1000 and not 1024.
 564
 565         Support for the different size conventions is new in wxWidgets 2.9.1,
 566         in previous versions only the traditional convention was implemented.
 567     */
 568     wxString
 569     GetHumanReadableSize(const wxString& failmsg = _("Not available"),
 570                          int precision = 1,
 571                          wxSizeConvention conv = wxSIZE_CONV_TRADITIONAL) const;
 572
 573     static wxString
 574     GetHumanReadableSize(const wxULongLong& bytes,
 575                          const wxString& nullsize = _("Not available"),
 576                          int precision = 1,
 577                          wxSizeConvention conv = wxSIZE_CONV_TRADITIONAL);
 578     //@}
 579
 580     /**
 581         Return the long form of the path (returns identity on non-Windows platforms).
 582     */
 583     wxString GetLongPath() const;
 584
 585     /**
 586         Returns the last time the file was last modified.
 587     */
 588     wxDateTime GetModificationTime() const;
 589
 590     /**
 591         Returns the name part of the filename (without extension).
 592
 593         @see GetFullName()
 594     */
 595     wxString GetName() const;
 596
 597     /**
 598         Returns the path part of the filename (without the name or extension).
 599
 600         The possible flags values are:
 601
 602         - @b wxPATH_GET_VOLUME:
 603         Return the path with the volume (does nothing for the filename formats
 604         without volumes), otherwise the path without volume part is returned.
 605
 606         - @b wxPATH_GET_SEPARATOR:
 607         Return the path with the trailing separator, if this flag is not given
 608         there will be no separator at the end of the path.
 609
 610         - @b wxPATH_NO_SEPARATOR:
 611         Don't include the trailing separator in the returned string. This is
 612         the default (the value of this flag is 0) and exists only for symmetry
 613         with wxPATH_GET_SEPARATOR.
 614
 615         @note If the path is a toplevel one (e.g. @c "/" on Unix or @c "C:\" on
 616               Windows), then the returned path will contain trailing separator
 617               even with @c wxPATH_NO_SEPARATOR.
 618     */
 619     wxString GetPath(int flags = wxPATH_GET_VOLUME,
 620                      wxPathFormat format = wxPATH_NATIVE) const;
 621
 622     /**
 623         Returns the usually used path separator for this format.
 624         For all formats but @c wxPATH_DOS there is only one path separator anyhow,
 625         but for DOS there are two of them and the native one, i.e. the backslash
 626         is returned by this method.
 627
 628         @see GetPathSeparators()
 629     */
 630     static wxUniChar GetPathSeparator(wxPathFormat format = wxPATH_NATIVE);
 631
 632     /**
 633         Returns the string containing all the path separators for this format.
 634         For all formats but @c wxPATH_DOS this string contains only one character
 635         but for DOS and Windows both @c '/' and @c '\' may be used as separators.
 636
 637         @see GetPathSeparator()
 638     */
 639     static wxString GetPathSeparators(wxPathFormat format = wxPATH_NATIVE);
 640
 641     /**
 642         Returns the string of characters which may terminate the path part.
 643         This is the same as GetPathSeparators() except for VMS
 644         path format where ] is used at the end of the path part.
 645     */
 646     static wxString GetPathTerminators(wxPathFormat format = wxPATH_NATIVE);
 647
 648     /**
 649         Returns the path with the trailing separator, useful for appending the name
 650         to the given path.
 651
 652         This is the same as calling
 653         @code
 654         GetPath(wxPATH_GET_VOLUME | wxPATH_GET_SEPARATOR, format)
 655         @endcode
 656     */
 657     wxString GetPathWithSep(wxPathFormat format = wxPATH_NATIVE) const;
 658
 659     /**
 660         Return the short form of the path (returns identity on non-Windows platforms).
 661     */
 662     wxString GetShortPath() const;
 663
 664     /**
 665         Returns the size of the file If the file does not exist or its size could
 666         not be read (because e.g. the file is locked by another process) the returned
 667         value is ::wxInvalidSize.
 668     */
 669     wxULongLong GetSize() const;
 670
 671     /**
 672         Returns the size of the file If the file does not exist or its size could
 673         not be read (because e.g. the file is locked by another process) the returned
 674         value is ::wxInvalidSize.
 675     */
 676     static wxULongLong GetSize(const wxString& filename);
 677
 678     /**
 679         Returns the directory used for temporary files.
 680     */
 681     static wxString GetTempDir();
 682
 683     /**
 684         Returns the last access, last modification and creation times.
 685         The last access time is updated whenever the file is read or written
 686         (or executed in the case of Windows), last modification time is only
 687         changed when the file is written to.
 688         Finally, the creation time is indeed the time when the file was created
 689         under Windows and the inode change time under Unix (as it is impossible to
 690         retrieve the real file creation time there anyhow) which can also be changed
 691         by many operations after the file creation.
 692
 693         If no filename or extension is specified in this instance of wxFileName
 694         (and therefore IsDir() returns @true) then this function will return the
 695         directory times of the path specified by GetPath(), otherwise the file
 696         times of the file specified by GetFullPath().
 697         Any of the pointers may be @NULL if the corresponding time is not needed.
 698
 699         @return @true on success, @false if we failed to retrieve the times.
 700     */
 701     bool GetTimes(wxDateTime* dtAccess, wxDateTime* dtMod,
 702                   wxDateTime* dtCreate) const;
 703
 704     /**
 705         Returns the string containing the volume for this file name, empty if it
 706         doesn't have one or if the file system doesn't support volumes at all
 707         (for example, Unix).
 708     */
 709     wxString GetVolume() const;
 710
 711     /**
 712         Returns the string separating the volume from the path for this format.
 713     */
 714     static wxString GetVolumeSeparator(wxPathFormat format = wxPATH_NATIVE);
 715
 716      /**
 717         This function builds a volume path string, for example "C:\\".
 718
 719         Implemented for the platforms which use drive letters, i.e. DOS, MSW
 720         and OS/2 only.
 721
 722         @since 2.9.0
 723
 724         @param drive
 725             The drive letter, 'A' through 'Z' or 'a' through 'z'.
 726
 727         @param flags
 728             @c wxPATH_NO_SEPARATOR or @c wxPATH_GET_SEPARATOR to omit or include
 729             the trailing path separator, the default is to include it.
 730
 731         @return Volume path string.
 732     */
 733     static wxString GetVolumeString(char drive, int flags = wxPATH_GET_SEPARATOR);
 734
 735     /**
 736         Returns @true if an extension is present.
 737     */
 738     bool HasExt() const;
 739
 740     /**
 741         Returns @true if a name is present.
 742     */
 743     bool HasName() const;
 744
 745     /**
 746         Returns @true if a volume specifier is present.
 747     */
 748     bool HasVolume() const;
 749
 750     /**
 751         Inserts a directory component before the zero-based position in the directory
 752         list. Please see AppendDir() for important notes.
 753     */
 754     void InsertDir(size_t before, const wxString& dir);
 755
 756     /**
 757         Returns @true if this filename is absolute.
 758     */
 759     bool IsAbsolute(wxPathFormat format = wxPATH_NATIVE) const;
 760
 761     /**
 762         Returns @true if the file names of this type are case-sensitive.
 763     */
 764     static bool IsCaseSensitive(wxPathFormat format = wxPATH_NATIVE);
 765
 766     /**
 767         Returns @true if this object represents a directory, @false otherwise
 768         (i.e. if it is a file).
 769
 770         Note that this method doesn't test whether the directory or file really
 771         exists, you should use DirExists() or FileExists() for this.
 772     */
 773     bool IsDir() const;
 774
 775     /**
 776         Returns @true if the directory component of this instance is an existing
 777         directory and this process has read permissions on it. Read permissions
 778         on a directory mean that you can list the directory contents but it
 779         doesn't imply that you have read permissions on the files contained.
 780     */
 781     bool IsDirReadable() const;
 782
 783     /**
 784         Returns @true if the given @e dir is an existing directory and this process
 785         has read permissions on it. Read permissions on a directory mean that you
 786         can list the directory contents but it doesn't imply that you have read
 787         permissions on the files contained.
 788     */
 789     static bool IsDirReadable(const wxString& dir);
 790
 791     /**
 792         Returns @true if the directory component of this instance
 793         is an existing directory and this process has write permissions on it.
 794         Write permissions on a directory mean that you can create new files in the
 795         directory.
 796     */
 797     bool IsDirWritable() const;
 798
 799     /**
 800         Returns @true if the  given @a dir is an existing directory and this
 801         process has write permissions on it.
 802         Write permissions on a directory mean that you can create new files in the
 803         directory.
 804     */
 805     static bool IsDirWritable(const wxString& dir);
 806
 807     /**
 808         Returns @true if a file with this name exists and if this process has execute
 809         permissions on it.
 810     */
 811     bool IsFileExecutable() const;
 812
 813     /**
 814         Returns @true if a file with this name exists and if this process has execute
 815         permissions on it.
 816     */
 817     static bool IsFileExecutable(const wxString& file);
 818
 819     /**
 820         Returns @true if a file with this name exists and if this process has read
 821         permissions on it.
 822     */
 823     bool IsFileReadable() const;
 824
 825     /**
 826         Returns @true if a file with this name exists and if this process has read
 827         permissions on it.
 828     */
 829     static bool IsFileReadable(const wxString& file);
 830
 831     /**
 832         Returns @true if a file with this name exists and if this process has write
 833         permissions on it.
 834     */
 835     bool IsFileWritable() const;
 836
 837     /**
 838         Returns @true if a file with this name exists and if this process has write
 839         permissions on it.
 840     */
 841     static bool IsFileWritable(const wxString& file);
 842
 843     /**
 844         Returns @true if the filename is valid, @false if it is not initialized yet.
 845         The assignment functions and Clear() may reset the object to the uninitialized,
 846         invalid state (the former only do it on failure).
 847     */
 848     bool IsOk() const;
 849
 850     /**
 851         Returns @true if the char is a path separator for this format.
 852     */
 853     static bool IsPathSeparator(wxChar ch,
 854                                 wxPathFormat format = wxPATH_NATIVE);
 855
 856     /**
 857         Returns @true if the volume part of the path is a unique volume name.
 858
 859         This function will always return @false if the path format is not
 860         wxPATH_DOS.
 861
 862         Unique volume names are Windows volume identifiers which remain the same
 863         regardless of where the volume is actually mounted. Example of a path
 864         using a volume name could be
 865         @code
 866             \\?\Volume{8089d7d7-d0ac-11db-9dd0-806d6172696f}\Program Files\setup.exe
 867         @endcode
 868
 869         @since 2.9.1
 870     */
 871     static bool IsMSWUniqueVolumeNamePath(const wxString& path,
 872                                           wxPathFormat format = wxPATH_NATIVE);
 873
 874     /**
 875         Returns @true if this filename is not absolute.
 876     */
 877     bool IsRelative(wxPathFormat format = wxPATH_NATIVE) const;
 878
 879     /**
 880         On Mac OS, gets the common type and creator for the given extension.
 881
 882         @onlyfor{wxosx}
 883     */
 884     static bool MacFindDefaultTypeAndCreator(const wxString& ext,
 885                                             wxUint32* type,
 886                                             wxUint32* creator);
 887
 888     /**
 889         On Mac OS, registers application defined extensions and their default type
 890         and creator.
 891
 892         @onlyfor{wxosx}
 893     */
 894     static void MacRegisterDefaultTypeAndCreator(const wxString& ext,
 895                                                 wxUint32 type,
 896                                                 wxUint32 creator);
 897
 898     /**
 899         On Mac OS, looks up the appropriate type and creator from the registration
 900         and then sets it.
 901
 902         @onlyfor{wxosx}
 903     */
 904     bool MacSetDefaultTypeAndCreator();
 905
 906     /**
 907         Make the file name absolute.
 908         This is a shortcut for
 909         @code
 910         wxFileName::Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_ABSOLUTE |
 911                               wxPATH_NORM_TILDE, cwd, format)
 912         @endcode
 913
 914         @see MakeRelativeTo(), Normalize(), IsAbsolute()
 915     */
 916     bool MakeAbsolute(const wxString& cwd = wxEmptyString,
 917                       wxPathFormat format = wxPATH_NATIVE);
 918
 919     /**
 920         This function tries to put this file name in a form relative to
 921         @a pathBase.
 922         In other words, it returns the file name which should be used to access
 923         this file if the current directory were pathBase.
 924
 925         @param pathBase
 926             The directory to use as root, current directory is used by default
 927         @param format
 928             The file name format, native by default
 929
 930         @return @true if the file name has been changed, @false if we failed to do
 931                 anything with it (currently this only happens if the file name
 932                 is on a volume different from the volume specified by @a pathBase).
 933
 934         @see Normalize()
 935     */
 936     bool MakeRelativeTo(const wxString& pathBase = wxEmptyString,
 937                         wxPathFormat format = wxPATH_NATIVE);
 938
 939     /**
 940         Creates a directory.
 941
 942         @param perm
 943             The permissions for the newly created directory.
 944             See the ::wxPosixPermissions enumeration for more info.
 945         @param flags
 946             If the flags contain @c wxPATH_MKDIR_FULL flag, try to create each
 947             directory in the path and also don't return an error if the target
 948             directory already exists.
 949
 950         @return Returns @true if the directory was successfully created, @false
 951                 otherwise.
 952     */
 953     bool Mkdir(int perm = wxS_DIR_DEFAULT, int flags = 0) const;
 954
 955     /**
 956         Creates a directory.
 957
 958         @param dir
 959             The directory to create
 960         @param perm
 961             The permissions for the newly created directory.
 962             See the ::wxPosixPermissions enumeration for more info.
 963         @param flags
 964             If the flags contain @c wxPATH_MKDIR_FULL flag, try to create each
 965             directory in the path and also don't return an error if the target
 966             directory already exists.
 967
 968         @return Returns @true if the directory was successfully created, @false
 969                 otherwise.
 970     */
 971     static bool Mkdir(const wxString& dir, int perm = wxS_DIR_DEFAULT,
 972                       int flags = 0);
 973
 974     /**
 975         Normalize the path.
 976
 977         With the default flags value, the path will be made absolute, without
 978         any ".." and "." and all environment variables will be expanded in it.
 979
 980         Notice that in some rare cases normalizing a valid path may result in
 981         an invalid wxFileName object. E.g. normalizing "./" path using
 982         wxPATH_NORM_DOTS but not wxPATH_NORM_ABSOLUTE will result in a
 983         completely empty and thus invalid object. As long as there is a non
 984         empty file name the result of normalization will be valid however.
 985
 986         @param flags
 987             The kind of normalization to do with the file name. It can be
 988             any or-combination of the ::wxPathNormalize enumeration values.
 989         @param cwd
 990             If not empty, this directory will be used instead of current
 991             working directory in normalization (see @c wxPATH_NORM_ABSOLUTE).
 992         @param format
 993             The file name format to use when processing the paths, native by default.
 994
 995         @return @true if normalization was successfully or @false otherwise.
 996     */
 997     bool Normalize(int flags = wxPATH_NORM_ALL,
 998                    const wxString& cwd = wxEmptyString,
 999                    wxPathFormat format = wxPATH_NATIVE);
1000
1001     /**
1002         Prepends a directory to the file path.
1003         Please see AppendDir() for important notes.
1004     */
1005     void PrependDir(const wxString& dir);
1006
1007     /**
1008         Removes the specified directory component from the path.
1009
1010         @see GetDirCount()
1011     */
1012     void RemoveDir(size_t pos);
1013
1014     /**
1015         Removes last directory component from the path.
1016     */
1017     void RemoveLastDir();
1018
1019     /**
1020         If the path contains the value of the environment variable named @a envname
1021         then this function replaces it with the string obtained from
1022         wxString::Format(replacementFmtString, value_of_envname_variable).
1023
1024         This function is useful to make the path shorter or to make it dependent
1025         from a certain environment variable.
1026         Normalize() with @c wxPATH_NORM_ENV_VARS can perform the opposite of this
1027         function (depending on the value of @a replacementFmtString).
1028
1029         The name and extension of this filename are not modified.
1030
1031         Example:
1032         @code
1033             wxFileName fn("/usr/openwin/lib/someFile");
1034             fn.ReplaceEnvVariable("OPENWINHOME");
1035                     // now fn.GetFullPath() == "$OPENWINHOME/lib/someFile"
1036         @endcode
1037
1038         @since 2.9.0
1039
1040         @return @true if the operation was successful (which doesn't mean
1041                 that something was actually replaced, just that ::wxGetEnv
1042                 didn't fail).
1043     */
1044     bool ReplaceEnvVariable(const wxString& envname,
1045                             const wxString& replacementFmtString = "$%s",
1046                             wxPathFormat format = wxPATH_NATIVE);
1047
1048     /**
1049         Replaces, if present in the path, the home directory for the given user
1050         (see ::wxGetHomeDir) with a tilde (~).
1051
1052         Normalize() with @c wxPATH_NORM_TILDE performs the opposite of this
1053         function.
1054
1055         The name and extension of this filename are not modified.
1056
1057         @since 2.9.0
1058
1059         @return @true if the operation was successful (which doesn't mean
1060                 that something was actually replaced, just that ::wxGetHomeDir
1061                 didn't fail).
1062     */
1063     bool ReplaceHomeDir(wxPathFormat format = wxPATH_NATIVE);
1064
1065
1066     /**
1067         Deletes the specified directory from the file system.
1068
1069         @param flags
1070             Can contain one of wxPATH_RMDIR_FULL or wxPATH_RMDIR_RECURSIVE. By
1071             default contains neither so the directory will not be removed
1072             unless it is empty.
1073
1074         @return Returns @true if the directory was successfully deleted, @false
1075                 otherwise.
1076     */
1077     bool Rmdir(int flags = 0) const;
1078
1079     /**
1080         Deletes the specified directory from the file system.
1081
1082         @param dir
1083             The directory to delete
1084         @param flags
1085             Can contain one of wxPATH_RMDIR_FULL or wxPATH_RMDIR_RECURSIVE. By
1086             default contains neither so the directory will not be removed
1087             unless it is empty.
1088
1089         @return Returns @true if the directory was successfully deleted, @false
1090                 otherwise.
1091     */
1092     static bool Rmdir(const wxString& dir, int flags = 0);
1093
1094     /**
1095         Compares the filename using the rules of this platform.
1096     */
1097     bool SameAs(const wxFileName& filepath,
1098                 wxPathFormat format = wxPATH_NATIVE) const;
1099
1100     /**
1101         Changes the current working directory.
1102     */
1103     bool SetCwd() const;
1104
1105     /**
1106         Changes the current working directory.
1107     */
1108     static bool SetCwd(const wxString& cwd);
1109
1110     /**
1111         Sets the extension of the file name to be an empty extension.
1112         This is different from having no extension at all as the file
1113         name will have a trailing dot after a call to this method.
1114
1115         @see SetExt(), ClearExt()
1116     */
1117     void SetEmptyExt();
1118
1119     /**
1120         Sets the extension of the file name.
1121
1122         Setting an empty string as the extension will remove the extension
1123         resulting in a file name without a trailing dot, unlike a call to
1124         SetEmptyExt().
1125
1126         @see SetEmptyExt(), ClearExt()
1127     */
1128     void SetExt(const wxString& ext);
1129
1130     /**
1131         The full name is the file name and extension (but without the path).
1132     */
1133     void SetFullName(const wxString& fullname);
1134
1135     /**
1136         Sets the name part (without extension).
1137
1138         @see SetFullName()
1139     */
1140     void SetName(const wxString& name);
1141
1142     /**
1143         Sets the path.
1144
1145         The @a path argument includes both the path and the volume, if
1146         supported by @a format.
1147
1148         Calling this function doesn't affect the name and extension components,
1149         to change them as well you can use Assign() or just an assignment
1150         operator.
1151
1152         @see GetPath()
1153      */
1154     void SetPath(const wxString& path, wxPathFormat format = wxPATH_NATIVE);
1155
1156     /**
1157         Sets the file creation and last access/modification times (any of the pointers
1158         may be @NULL).
1159     */
1160     bool SetTimes(const wxDateTime* dtAccess,
1161                   const wxDateTime* dtMod,
1162                   const wxDateTime* dtCreate) const;
1163
1164     /**
1165         Sets the volume specifier.
1166     */
1167     void SetVolume(const wxString& volume);
1168
1169     //@{
1170     /**
1171         This function splits a full file name into components: the volume (with the
1172         first version) path (including the volume in the second version), the base name
1173         and the extension.
1174
1175         Any of the output parameters (@e volume, @e path, @a name or @e ext) may
1176         be @NULL if you are not interested in the value of a particular component.
1177         Also, @a fullpath may be empty on entry.
1178         On return, @a path contains the file path (without the trailing separator),
1179         @a name contains the file name and @a ext contains the file extension
1180         without leading dot. All three of them may be empty if the corresponding
1181         component is. The old contents of the strings pointed to by these parameters
1182         will be overwritten in any case (if the pointers are not @NULL).
1183
1184         Note that for a filename "foo." the extension is present, as indicated by the
1185         trailing dot, but empty. If you need to cope with such cases, you should use
1186         @a hasExt instead of relying on testing whether @a ext is empty or not.
1187     */
1188     static void SplitPath(const wxString& fullpath,
1189                           wxString* volume,
1190                           wxString* path,
1191                           wxString* name,
1192                           wxString* ext,
1193                           bool* hasExt = NULL,
1194                           wxPathFormat format = wxPATH_NATIVE);
1195     static void SplitPath(const wxString& fullpath,
1196                           wxString* volume,
1197                           wxString* path,
1198                           wxString* name,
1199                           wxString* ext,
1200                           wxPathFormat format);
1201     static void SplitPath(const wxString& fullpath,
1202                           wxString* path,
1203                           wxString* name,
1204                           wxString* ext,
1205                           wxPathFormat format = wxPATH_NATIVE);
1206     //@}
1207
1208     /**
1209         Splits the given @a fullpath into the volume part (which may be empty) and
1210         the pure path part, not containing any volume.
1211
1212         @see SplitPath()
1213     */
1214     static void SplitVolume(const wxString& fullpath,
1215                             wxString* volume,
1216                             wxString* path,
1217                             wxPathFormat format = wxPATH_NATIVE);
1218
1219
1220     /**
1221         Strip the file extension.
1222
1223         This function does more than just removing everything after the last
1224         period from the string, for example it will return the string ".vimrc"
1225         unchanged because the part after the period is not an extension but the
1226         file name in this case. You can use wxString::BeforeLast() to really
1227         get just the part before the last period (but notice that that function
1228         returns empty string if period is not present at all unlike this
1229         function which returns the @a fullname unchanged in this case).
1230
1231         @param fullname
1232            File path including name and, optionally, extension.
1233
1234         @return
1235             File path without extension
1236
1237         @since 2.9.0
1238     */
1239     static wxString StripExtension(const wxString& fullname);
1240
1241     /**
1242         Sets the access and modification times to the current moment.
1243     */
1244     bool Touch() const;
1245
1246     /**
1247         Returns @true if the filenames are different. The string @e filenames
1248         is interpreted as a path in the native filename format.
1249     */
1250     bool operator!=(const wxFileName& filename) const;
1251
1252     /**
1253         Returns @true if the filenames are different. The string @e filenames
1254         is interpreted as a path in the native filename format.
1255     */
1256     bool operator!=(const wxString& filename) const;
1257
1258     /**
1259         Returns @true if the filenames are equal. The string @e filenames is
1260         interpreted as a path in the native filename format.
1261     */
1262     bool operator==(const wxFileName& filename) const;
1263
1264     /**
1265         Returns @true if the filenames are equal. The string @e filenames is
1266         interpreted as a path in the native filename format.
1267     */
1268     bool operator==(const wxString& filename) const;
1269
1270     /**
1271         Assigns the new value to this filename object.
1272     */
1273     wxFileName& operator=(const wxFileName& filename);
1274
1275     /**
1276         Assigns the new value to this filename object.
1277     */
1278     wxFileName& operator=(const wxString& filename);
1279 };