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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: filefn.h
3 // Purpose: interface of wxPathList and file functions
4 // Author: wxWidgets team
5 // RCS-ID: $Id$
6 // Licence: wxWindows license
7 /////////////////////////////////////////////////////////////////////////////
8
9 /**
10 @class wxPathList
11
12 The path list is a convenient way of storing a number of directories, and
13 when presented with a filename without a directory, searching for an
14 existing file in those directories.
15
16 Be sure to look also at wxStandardPaths if you only want to search files in
17 some standard paths.
18
19 @library{wxbase}
20 @category{file}
21
22 @see wxArrayString, wxStandardPaths, wxFileName
23 */
24 class wxPathList : public wxArrayString
25 {
26 public:
27 /**
28 Standard constructor.
29 */
30 wxPathList();
31
32 /**
33 Constructs the object calling the Add() function.
34 */
35 wxPathList(const wxArrayString& arr);
36
37 /**
38 Adds the given directory to the path list, if the @a path is not already in the list.
39 If the path cannot be normalized for some reason, it returns @false.
40
41 The @a path is always considered to be a directory but no existence checks will be
42 done on it (because if it doesn't exist, it could be created later and thus result a
43 valid path when FindValidPath() is called).
44
45 @note if the given path is relative, it won't be made absolute before adding it
46 (this is why FindValidPath() may return relative paths).
47 */
48 bool Add(const wxString& path);
49
50 /**
51 Adds all elements of the given array as paths.
52 */
53 void Add(const wxArrayString& arr);
54
55 /**
56 Finds the value of the given environment variable, and adds all paths
57 to the path list.
58
59 Useful for finding files in the @c PATH variable, for example.
60 */
61 void AddEnvList(const wxString& env_variable);
62
63 /**
64 Given a full filename (with path), calls Add() with the path of the file.
65 */
66 bool EnsureFileAccessible(const wxString& filename);
67
68 /**
69 Like FindValidPath() but this function always returns an absolute path
70 (eventually prepending the current working directory to the value returned
71 wxPathList::FindValidPath()) or an empty string.
72 */
73 wxString FindAbsoluteValidPath(const wxString& file) const;
74
75 /**
76 Searches the given file in all paths stored in this class.
77
78 The first path which concatenated to the given string points to an existing
79 file (see wxFileExists()) is returned.
80
81 If the file wasn't found in any of the stored paths, an empty string is returned.
82
83 The given string must be a file name, eventually with a path prefix (if the path
84 prefix is absolute, only its name will be searched); i.e. it must not end with
85 a directory separator (see wxFileName::GetPathSeparator) otherwise an assertion
86 will fail.
87
88 The returned path may be relative to the current working directory.
89
90 Note in fact that wxPathList can be used to store both relative and absolute
91 paths so that if you added relative paths, then the current working directory
92 (see wxGetCwd() and wxSetWorkingDirectory()) may affect the value returned
93 by this function!
94 */
95 wxString FindValidPath(const wxString& file) const;
96 };
97
98
99
100 // ============================================================================
101 // Global functions/macros
102 // ============================================================================
103
104 /** @addtogroup group_funcmacro_file */
105 //@{
106
107 /**
108 A special return value of many wxWidgets classes to indicate that
109 an invalid offset was given.
110 */
111 const int wxInvalidOffset = -1;
112
113 /**
114 The type used to store and provide byte offsets or byte sizes for files or streams.
115
116 It is type-defined as @c off_t on POSIX platforms
117 (see http://www.gnu.org/software/libc/manual/html_node/File-Position-Primitive.html)
118 or to @c wxLongLong_t on Windows when @c wxHAS_HUGE_FILES is defined.
119 */
120 typedef off_t wxFileOffset;
121
122 /**
123 Under Unix this macro changes the current process umask to the given value,
124 unless it is equal to -1 in which case nothing is done, and restores it to
125 the original value on scope exit. It works by declaring a variable which
126 sets umask to @a mask in its constructor and restores it in its destructor.
127 Under other platforms this macro expands to nothing.
128
129 @header{wx/filefn.h}
130 */
131 #define wxCHANGE_UMASK(mask)
132
133 /**
134 This function returns the total number of bytes and number of free bytes on
135 the disk containing the directory @a path (it should exist). Both @a total
136 and @a free parameters may be @NULL if the corresponding information is not
137 needed.
138
139 @since 2.3.2
140
141 @note The generic Unix implementation depends on the system having the
142 @c statfs() or @c statvfs() function.
143
144 @return @true on success, @false if an error occurred (for example, the
145 directory doesn’t exist).
146
147 @header{wx/filefn.h}
148 */
149 bool wxGetDiskSpace(const wxString& path,
150 wxLongLong total = NULL,
151 wxLongLong free = NULL);
152
153 /**
154 Returns the Windows directory under Windows; other platforms return an
155 empty string.
156
157 @header{wx/filefn.h}
158 */
159 wxString wxGetOSDirectory();
160
161 /**
162 Parses the @a wildCard, returning the number of filters. Returns 0 if none
163 or if there's a problem.
164
165 The arrays will contain an equal number of items found before the error. On
166 platforms where native dialogs handle only one filter per entry, entries in
167 arrays are automatically adjusted. @a wildCard is in the form:
168
169 @code
170 "All files (*)|*|Image Files (*.jpeg *.png)|*.jpg;*.png"
171 @endcode
172
173 @header{wx/filefn.h}
174 */
175 int wxParseCommonDialogsFilter(const wxString& wildCard,
176 wxArrayString& descriptions,
177 wxArrayString& filters);
178
179 /**
180 Converts a DOS to a Unix filename by replacing backslashes with forward
181 slashes.
182
183 @deprecated
184 Construct a wxFileName with wxPATH_DOS and then use
185 wxFileName::GetFullPath(wxPATH_UNIX) instead.
186
187 @header{wx/filefn.h}
188 */
189 void wxDos2UnixFilename(wxChar* s);
190
191 /**
192 Converts a Unix to a DOS filename by replacing forward slashes with
193 backslashes.
194
195 @deprecated
196 Construct a wxFileName with wxPATH_UNIX and then use
197 wxFileName::GetFullPath(wxPATH_DOS) instead.
198
199 @header{wx/filefn.h}
200 */
201 void wxUnix2DosFilename(wxChar* s);
202
203 /**
204 Returns @true if @a dirname exists and is a directory.
205
206 @header{wx/filefn.h}
207 */
208 bool wxDirExists(const wxString& dirname);
209
210 /**
211 @deprecated
212 This function is obsolete, please use wxFileName::SplitPath() instead.
213
214 This function splits a full file name into components: the path (including
215 possible disk/drive specification under Windows), the base name, and the
216 extension. Any of the output parameters (@a path, @a name or @a ext) may be
217 @NULL if you are not interested in the value of a particular component.
218
219 wxSplitPath() will correctly handle filenames with both DOS and Unix path
220 separators under Windows, however it will not consider backslashes as path
221 separators under Unix (where backslash is a valid character in a filename).
222
223 On entry, @a fullname should be non-@NULL (it may be empty though).
224
225 On return, @a path contains the file path (without the trailing separator),
226 @a name contains the file name and @c ext contains the file extension
227 without leading dot. All three of them may be empty if the corresponding
228 component is. The old contents of the strings pointed to by these
229 parameters will be overwritten in any case (if the pointers are not @NULL).
230
231 @header{wx/filefn.h}
232 */
233 void wxSplitPath(const wxString& fullname,
234 wxString* path,
235 wxString* name,
236 wxString* ext);
237
238 /**
239 Returns time of last modification of given file.
240
241 The function returns <tt>(time_t)-1</tt> if an error occurred (e.g. file
242 not found).
243
244 @header{wx/filefn.h}
245 */
246 time_t wxFileModificationTime(const wxString& filename);
247
248 /**
249 Renames @a file1 to @e file2, returning @true if successful.
250
251 If @a overwrite parameter is @true (default), the destination file is
252 overwritten if it exists, but if @a overwrite is @false, the functions
253 fails in this case.
254
255 @header{wx/filefn.h}
256 */
257 bool wxRenameFile(const wxString& file1,
258 const wxString& file2,
259 bool overwrite = true);
260
261 /**
262 Copies @a file1 to @e file2, returning @true if successful. If @a overwrite
263 parameter is @true (default), the destination file is overwritten if it
264 exists, but if @a overwrite is @false, the functions fails in this case.
265
266 This function supports resources forks under Mac OS.
267
268 @header{wx/filefn.h}
269 */
270 bool wxCopyFile(const wxString& file1,
271 const wxString& file2,
272 bool overwrite = true);
273
274 /**
275 Returns @true if the file exists and is a plain file.
276
277 @header{wx/filefn.h}
278 */
279 bool wxFileExists(const wxString& filename);
280
281 /**
282 Returns @true if the @a pattern matches the @e text; if @a dot_special is
283 @true, filenames beginning with a dot are not matched with wildcard
284 characters.
285
286 @see wxIsWild()
287
288 @header{wx/filefn.h}
289 */
290 bool wxMatchWild(const wxString& pattern,
291 const wxString& text,
292 bool dot_special);
293
294 /**
295 @deprecated This function is deprecated, use wxGetCwd() instead.
296
297 Copies the current working directory into the buffer if supplied, or copies
298 the working directory into new storage (which you must delete yourself) if
299 the buffer is @NULL.
300
301 @a sz is the size of the buffer if supplied.
302
303 @header{wx/filefn.h}
304 */
305 wxString wxGetWorkingDirectory(char* buf = NULL, int sz = 1000);
306
307 /**
308 Returns the directory part of the filename.
309
310 @header{wx/filefn.h}
311 */
312 wxString wxPathOnly(const wxString& path);
313
314 /**
315 Returns @true if the pattern contains wildcards.
316
317 @see wxMatchWild()
318
319 @header{wx/filefn.h}
320 */
321 bool wxIsWild(const wxString& pattern);
322
323 /**
324 Returns @true if the argument is an absolute filename, i.e. with a slash
325 or drive name at the beginning.
326
327 @header{wx/filefn.h}
328 */
329 bool wxIsAbsolutePath(const wxString& filename);
330
331 /**
332 Returns a string containing the current (or working) directory.
333
334 @header{wx/filefn.h}
335 */
336 wxString wxGetCwd();
337
338 /**
339 Sets the current working directory, returning @true if the operation
340 succeeded. Under MS Windows, the current drive is also changed if @a dir
341 contains a drive specification.
342
343 @header{wx/filefn.h}
344 */
345 bool wxSetWorkingDirectory(const wxString& dir);
346
347 /**
348 Concatenates @a file1 and @a file2 to @e file3, returning @true if
349 successful.
350
351 @header{wx/filefn.h}
352 */
353 bool wxConcatFiles(const wxString& file1,
354 const wxString& file2,
355 const wxString& file3);
356
357 /**
358 Removes @e file, returning @true if successful.
359
360 @header{wx/filefn.h}
361 */
362 bool wxRemoveFile(const wxString& file);
363
364 /**
365 File permission bit names.
366
367 We define these constants in wxWidgets because S_IREAD &c are not standard.
368 However, we do assume that the values correspond to the Unix umask bits.
369 */
370 enum wxPosixPermissions
371 {
372 /// Standard POSIX names for these permission flags with "wx" prefix.
373 //@{
374 wxS_IRUSR = 00400,
375 wxS_IWUSR = 00200,
376 wxS_IXUSR = 00100,
377
378 wxS_IRGRP = 00040,
379 wxS_IWGRP = 00020,
380 wxS_IXGRP = 00010,
381
382 wxS_IROTH = 00004,
383 wxS_IWOTH = 00002,
384 wxS_IXOTH = 00001,
385 //@}
386
387 /// Longer but more readable synonyms for the constants above.
388 //@{
389 wxPOSIX_USER_READ = wxS_IRUSR,
390 wxPOSIX_USER_WRITE = wxS_IWUSR,
391 wxPOSIX_USER_EXECUTE = wxS_IXUSR,
392
393 wxPOSIX_GROUP_READ = wxS_IRGRP,
394 wxPOSIX_GROUP_WRITE = wxS_IWGRP,
395 wxPOSIX_GROUP_EXECUTE = wxS_IXGRP,
396
397 wxPOSIX_OTHERS_READ = wxS_IROTH,
398 wxPOSIX_OTHERS_WRITE = wxS_IWOTH,
399 wxPOSIX_OTHERS_EXECUTE = wxS_IXOTH,
400 //@}
401
402 /// Default mode for the new files: allow reading/writing them to everybody but
403 /// the effective file mode will be set after ANDing this value with umask and
404 /// so won't include wxS_IW{GRP,OTH} for the default 022 umask value
405 wxS_DEFAULT = (wxPOSIX_USER_READ | wxPOSIX_USER_WRITE | \
406 wxPOSIX_GROUP_READ | wxPOSIX_GROUP_WRITE | \
407 wxPOSIX_OTHERS_READ | wxPOSIX_OTHERS_WRITE),
408
409 /// Default mode for the new directories (see wxFileName::Mkdir): allow
410 /// reading/writing/executing them to everybody, but just like wxS_DEFAULT
411 /// the effective directory mode will be set after ANDing this value with umask
412 wxS_DIR_DEFAULT = (wxPOSIX_USER_READ | wxPOSIX_USER_WRITE | wxPOSIX_USER_EXECUTE | \
413 wxPOSIX_GROUP_READ | wxPOSIX_GROUP_WRITE | wxPOSIX_GROUP_EXECUTE | \
414 wxPOSIX_OTHERS_READ | wxPOSIX_OTHERS_WRITE | wxPOSIX_OTHERS_EXECUTE)
415 };
416
417 /**
418 Makes the directory @a dir, returning @true if successful.
419
420 @a perm is the access mask for the directory for the systems on which it is
421 supported (Unix) and doesn't have any effect on the other ones.
422
423 @header{wx/filefn.h}
424 */
425 bool wxMkdir(const wxString& dir, int perm = wxS_DIR_DEFAULT);
426
427 /**
428 Removes the directory @a dir, returning @true if successful. Does not work
429 under VMS.
430
431 The @a flags parameter is reserved for future use.
432
433 @note There is also a wxRmDir() function which simply wraps the standard
434 POSIX @c rmdir() function and so return an integer error code instead
435 of a boolean value (but otherwise is currently identical to
436 wxRmdir()), don't confuse these two functions.
437
438 @header{wx/filefn.h}
439 */
440 bool wxRmdir(const wxString& dir, int flags = 0);
441
442 /**
443 Returns the next file that matches the path passed to wxFindFirstFile().
444
445 See wxFindFirstFile() for an example.
446
447 @header{wx/filefn.h}
448 */
449 wxString wxFindNextFile();
450
451 /**
452 This function does directory searching; returns the first file that matches
453 the path @a spec, or the empty string. Use wxFindNextFile() to get the next
454 matching file. Neither will report the current directory "." or the parent
455 directory "..".
456
457 @warning As of 2.5.2, these functions are not thread-safe! (they use static
458 variables). You probably want to use wxDir::GetFirst() or
459 wxDirTraverser instead.
460
461 @a spec may contain wildcards.
462
463 @a flags may be wxDIR for restricting the query to directories, wxFILE for
464 files or zero for either.
465
466 For example:
467
468 @code
469 wxString f = wxFindFirstFile("/home/project/*.*");
470 while ( !f.empty() )
471 {
472 ...
473 f = wxFindNextFile();
474 }
475 @endcode
476
477 @header{wx/filefn.h}
478 */
479 wxString wxFindFirstFile(const wxString& spec, int flags = 0);
480
481 /**
482 File kind enumerations returned from wxGetFileKind().
483
484 @header{wx/filefn.h}
485 */
486 enum wxFileKind
487 {
488 wxFILE_KIND_UNKNOWN, ///< Unknown file kind, or unable to determine
489 wxFILE_KIND_DISK, ///< A file supporting seeking to arbitrary offsets
490 wxFILE_KIND_TERMINAL, ///< A tty
491 wxFILE_KIND_PIPE ///< A pipe
492 };
493
494 //@}
495
496 /** @addtogroup group_funcmacro_file */
497 //@{
498 /**
499 Returns the type of an open file. Possible return values are enumerations
500 of ::wxFileKind.
501
502 @header{wx/filefn.h}
503 */
504 wxFileKind wxGetFileKind(int fd);
505 wxFileKind wxGetFileKind(FILE* fp);
506 //@}
507
508 /** @addtogroup group_funcmacro_file */
509 //@{
510 /**
511 @deprecated
512 This function is obsolete, please use wxFileName::SplitPath() instead.
513
514 Returns the filename for a full path. The second form returns a pointer to
515 temporary storage that should not be deallocated.
516
517 @header{wx/filefn.h}
518 */
519 wxString wxFileNameFromPath(const wxString& path);
520 char* wxFileNameFromPath(char* path);
521 //@}
522
523 /** @addtogroup group_funcmacro_file */
524 //@{
525 /**
526 @deprecated
527 This function is obsolete, please use wxFileName::CreateTempFileName() instead.
528
529 @header{wx/filefn.h}
530 */
531 char* wxGetTempFileName(const wxString& prefix, char* buf = NULL);
532 bool wxGetTempFileName(const wxString& prefix, wxString& buf);
533 //@}
534