Detailed Description

These functions provide a platform-independent API for common file and directory functionality.

Related class group: File Handling

Defines
#define	wxCHANGE_UMASK(mask)
	Under Unix this macro changes the current process umask to the given value, unless it is equal to -1 in which case nothing is done, and restores it to the original value on scope exit.
Typedefs
typedef off_t	wxFileOffset
	The type used to store and provide byte offsets or byte sizes for files or streams.
Enumerations
enum	wxPosixPermissions { wxS_IRUSR = 00400, wxS_IWUSR = 00200, wxS_IXUSR = 00100, wxS_IRGRP = 00040, wxS_IWGRP = 00020, wxS_IXGRP = 00010, wxS_IROTH = 00004, wxS_IWOTH = 00002, wxS_IXOTH = 00001, wxPOSIX_USER_READ = wxS_IRUSR, wxPOSIX_USER_WRITE = wxS_IWUSR, wxPOSIX_USER_EXECUTE = wxS_IXUSR, wxPOSIX_GROUP_READ = wxS_IRGRP, wxPOSIX_GROUP_WRITE = wxS_IWGRP, wxPOSIX_GROUP_EXECUTE = wxS_IXGRP, wxPOSIX_OTHERS_READ = wxS_IROTH, wxPOSIX_OTHERS_WRITE = wxS_IWOTH, wxPOSIX_OTHERS_EXECUTE = wxS_IXOTH, wxS_DEFAULT, wxS_DIR_DEFAULT }
	File permission bit names. More...
enum	wxSeekMode { wxFromStart, wxFromCurrent, wxFromEnd }
	Parameter indicating how file offset should be interpreted. More...
enum	wxFileKind { wxFILE_KIND_UNKNOWN, wxFILE_KIND_DISK, wxFILE_KIND_TERMINAL, wxFILE_KIND_PIPE }
	File kind enumerations returned from wxGetFileKind(). More...
Functions
bool	wxTransferFileToStream (const wxString &filename, ostream &stream)
	Copies the given file to stream.
bool	wxTransferStreamToFile (istream &stream, const wxString &filename)
	Copies the given stream to the file filename.
bool	wxGetDiskSpace (const wxString &path, wxLongLong total=NULL, wxLongLong free=NULL)
	This function returns the total number of bytes and number of free bytes on the disk containing the directory path (it should exist).
wxString	wxGetOSDirectory ()
	Returns the Windows directory under Windows; other platforms return an empty string.
int	wxParseCommonDialogsFilter (const wxString &wildCard, wxArrayString &descriptions, wxArrayString &filters)
	Parses the wildCard, returning the number of filters.
void	wxDos2UnixFilename (wxChar *s)
	Converts a DOS to a Unix filename by replacing backslashes with forward slashes.
void	wxUnix2DosFilename (wxChar *s)
	Converts a Unix to a DOS filename by replacing forward slashes with backslashes.
bool	wxDirExists (const wxString &dirname)
	Returns true if dirname exists and is a directory.
void	wxSplitPath (const wxString &fullname, wxString path, wxString name, wxString *ext)
time_t	wxFileModificationTime (const wxString &filename)
	Returns time of last modification of given file.
bool	wxRenameFile (const wxString &file1, const wxString &file2, bool overwrite=true)
	Renames file1 to file2, returning true if successful.
bool	wxCopyFile (const wxString &file1, const wxString &file2, bool overwrite=true)
	Copies file1 to file2, returning true if successful.
bool	wxFileExists (const wxString &filename)
	Returns true if the file exists and is a plain file.
bool	wxMatchWild (const wxString &pattern, const wxString &text, bool dot_special)
	Returns true if the pattern matches the text; if dot_special is true, filenames beginning with a dot are not matched with wildcard characters.
wxString	wxGetWorkingDirectory (char *buf=NULL, int sz=1000)
wxString	wxPathOnly (const wxString &path)
	Returns the directory part of the filename.
bool	wxIsWild (const wxString &pattern)
	Returns true if the pattern contains wildcards.
bool	wxIsAbsolutePath (const wxString &filename)
	Returns true if the argument is an absolute filename, i.e.
wxString	wxGetCwd ()
	Returns a string containing the current (or working) directory.
bool	wxSetWorkingDirectory (const wxString &dir)
	Sets the current working directory, returning true if the operation succeeded.
bool	wxConcatFiles (const wxString &file1, const wxString &file2, const wxString &file3)
	Concatenates file1 and file2 to file3, returning true if successful.
bool	wxRemoveFile (const wxString &file)
	Removes file, returning true if successful.
bool	wxMkdir (const wxString &dir, int perm=wxS_DIR_DEFAULT)
	Makes the directory dir, returning true if successful.
bool	wxRmdir (const wxString &dir, int flags=0)
	Removes the directory dir, returning true if successful.
wxString	wxFindNextFile ()
	Returns the next file that matches the path passed to wxFindFirstFile().
wxString	wxFindFirstFile (const wxString &spec, int flags=0)
	This function does directory searching; returns the first file that matches the path spec, or the empty string.
wxFileKind	wxGetFileKind (int fd)
	Returns the type of an open file.
wxFileKind	wxGetFileKind (FILE *fp)
wxString	wxFileNameFromPath (const wxString &path)
char *	wxFileNameFromPath (char *path)
char *	wxGetTempFileName (const wxString &prefix, char *buf=NULL)
bool	wxGetTempFileName (const wxString &prefix, wxString &buf)
Variables
const int	wxInvalidOffset = -1
	A special return value of many wxWidgets classes to indicate that an invalid offset was given.

Define Documentation

#define wxCHANGE_UMASK ( mask )

Under Unix this macro changes the current process umask to the given value, unless it is equal to -1 in which case nothing is done, and restores it to the original value on scope exit.

It works by declaring a variable which sets umask to mask in its constructor and restores it in its destructor. Under other platforms this macro expands to nothing.

Include file:

#include <wx/filefn.h>

Typedef Documentation

typedef off_t wxFileOffset

The type used to store and provide byte offsets or byte sizes for files or streams.

This type is usually just a synonym for off_t but can be defined as wxLongLong_t if wxHAS_HUGE_FILES is defined but off_t is only 32 bits.

Enumeration Type Documentation

enum wxFileKind

File kind enumerations returned from wxGetFileKind().

Also used by wxFFile::GetKind() and wxFile::GetKind().

Include file:

#include <wx/filefn.h>

Enumerator:

wxFILE_KIND_UNKNOWN	Unknown file kind, or unable to determine.
wxFILE_KIND_DISK	A file supporting seeking to arbitrary offsets.
wxFILE_KIND_TERMINAL	A tty.
wxFILE_KIND_PIPE	A pipe.

enum wxPosixPermissions

File permission bit names.

We define these constants in wxWidgets because S_IREAD &c are not standard. However, we do assume that the values correspond to the Unix umask bits.

Enumerator:

wxS_IRUSR	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IWUSR	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IXUSR	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IRGRP	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IWGRP	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IXGRP	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IROTH	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IWOTH	Standard POSIX names for these permission flags with "wx" prefix.
wxS_IXOTH	Standard POSIX names for these permission flags with "wx" prefix.
wxPOSIX_USER_READ	Longer but more readable synonyms for the constants above.
wxPOSIX_USER_WRITE	Longer but more readable synonyms for the constants above.
wxPOSIX_USER_EXECUTE	Longer but more readable synonyms for the constants above.
wxPOSIX_GROUP_READ	Longer but more readable synonyms for the constants above.
wxPOSIX_GROUP_WRITE	Longer but more readable synonyms for the constants above.
wxPOSIX_GROUP_EXECUTE	Longer but more readable synonyms for the constants above.
wxPOSIX_OTHERS_READ	Longer but more readable synonyms for the constants above.
wxPOSIX_OTHERS_WRITE	Longer but more readable synonyms for the constants above.
wxPOSIX_OTHERS_EXECUTE	Longer but more readable synonyms for the constants above.
wxS_DEFAULT	Default mode for the new files: allow reading/writing them to everybody but the effective file mode will be set after ANDing this value with umask and so won't include wxS_IW{GRP,OTH} for the default 022 umask value.
wxS_DIR_DEFAULT	Default mode for the new directories (see wxFileName::Mkdir): allow reading/writing/executing them to everybody, but just like wxS_DEFAULT the effective directory mode will be set after ANDing this value with umask.

enum wxSeekMode

Parameter indicating how file offset should be interpreted.

This is used by wxFFile::Seek() and wxFile::Seek().

Include file:

#include <wx/filefn.h>

Enumerator:

wxFromStart	Seek from the file beginning.
wxFromCurrent	Seek from the current position.
wxFromEnd	Seek from end of the file.

Function Documentation

bool wxConcatFiles	(	const wxString &	file1,
		const wxString &	file2,
		const wxString &	file3
	)

Concatenates file1 and file2 to file3, returning true if successful.

Include file:

#include <wx/filefn.h>

bool wxCopyFile	(	const wxString &	file1,
		const wxString &	file2,
		bool	overwrite = `true`
	)

Copies file1 to file2, returning true if successful.

If overwrite parameter is true (default), the destination file is overwritten if it exists, but if overwrite is false, the functions fails in this case.

This function supports resources forks under Mac OS.

Include file:

#include <wx/filefn.h>

bool wxDirExists ( const wxString & dirname )

Returns true if dirname exists and is a directory.

Include file:

#include <wx/filefn.h>

void wxDos2UnixFilename ( wxChar * s )

Converts a DOS to a Unix filename by replacing backslashes with forward slashes.

Deprecated:: Construct a wxFileName with wxPATH_DOS and then use wxFileName::GetFullPath(wxPATH_UNIX) instead.

Include file:

#include <wx/filefn.h>

bool wxFileExists ( const wxString & filename )

Returns true if the file exists and is a plain file.

Include file:

#include <wx/filefn.h>

time_t wxFileModificationTime ( const wxString & filename )

Returns time of last modification of given file.

The function returns (time_t)-1 if an error occurred (e.g. file not found).

Include file:

#include <wx/filefn.h>

wxString wxFileNameFromPath ( const wxString & path )

Deprecated:: This function is obsolete, please use wxFileName::SplitPath() instead.

Returns the filename for a full path. The second form returns a pointer to temporary storage that should not be deallocated.

Include file:

#include <wx/filefn.h>

char* wxFileNameFromPath ( char * path )

wxString wxFindFirstFile	(	const wxString &	spec,
		int	flags = `0`
	)

This function does directory searching; returns the first file that matches the path spec, or the empty string.

Use wxFindNextFile() to get the next matching file. Neither will report the current directory "." or the parent directory "..".

Warning:: As of 2.5.2, these functions are not thread-safe! (they use static variables). You probably want to use wxDir::GetFirst() or wxDirTraverser instead.

spec may contain wildcards.

flags may be wxDIR for restricting the query to directories, wxFILE for files or zero for either.

以下に例を示します:

    wxString f = wxFindFirstFile("/home/project/*.*");
    while ( !f.empty() )
    {
        ...
        f = wxFindNextFile();
    }

Include file:

#include <wx/filefn.h>

wxString wxFindNextFile ( )

Returns the next file that matches the path passed to wxFindFirstFile().

See wxFindFirstFile() for an example.

Include file:

#include <wx/filefn.h>

wxString wxGetCwd ( )

Returns a string containing the current (or working) directory.

Include file:

#include <wx/filefn.h>

bool wxGetDiskSpace	(	const wxString &	path,
		wxLongLong	total = `NULL`,
		wxLongLong	free = `NULL`
	)

This function returns the total number of bytes and number of free bytes on the disk containing the directory path (it should exist).

Both total and free parameters may be NULL if the corresponding information is not needed.

Since:: 2.3.2

注:: The generic Unix implementation depends on the system having the statfs() or statvfs() function.

Returns:: true on success, false if an error occurred (for example, the directory doesn’t exist).

Include file:

#include <wx/filefn.h>

wxFileKind wxGetFileKind ( int fd )

Returns the type of an open file.

Possible return values are enumerations of wxFileKind.

Include file:

#include <wx/filefn.h>

wxFileKind wxGetFileKind ( FILE * fp )

wxString wxGetOSDirectory ( )

Returns the Windows directory under Windows; other platforms return an empty string.

Include file:

#include <wx/filefn.h>

bool wxGetTempFileName	(	const wxString &	prefix,
		wxString &	buf
	)

char* wxGetTempFileName	(	const wxString &	prefix,
		char *	buf = `NULL`
	)

Deprecated:: This function is obsolete, please use wxFileName::CreateTempFileName() instead.

Include file:

#include <wx/filefn.h>

wxString wxGetWorkingDirectory	(	char *	buf = `NULL`,
		int	sz = `1000`
	)

Deprecated:: This function is deprecated, use wxGetCwd() instead.

Copies the current working directory into the buffer if supplied, or copies the working directory into new storage (which you must delete yourself) if the buffer is NULL.

sz is the size of the buffer if supplied.

Include file:

#include <wx/filefn.h>

bool wxIsAbsolutePath ( const wxString & filename )

Returns true if the argument is an absolute filename, i.e.

with a slash or drive name at the beginning.

Include file:

#include <wx/filefn.h>

bool wxIsWild ( const wxString & pattern )

Returns true if the pattern contains wildcards.

参照:: wxMatchWild()

Include file:

#include <wx/filefn.h>

bool wxMatchWild	(	const wxString &	pattern,
		const wxString &	text,
		bool	dot_special
	)

Returns true if the pattern matches the text; if dot_special is true, filenames beginning with a dot are not matched with wildcard characters.

参照:: wxIsWild()

Include file:

#include <wx/filefn.h>

bool wxMkdir	(	const wxString &	dir,
		int	perm = `wxS_DIR_DEFAULT`
	)

Makes the directory dir, returning true if successful.

perm is the access mask for the directory for the systems on which it is supported (Unix) and doesn't have any effect on the other ones.

Include file:

#include <wx/filefn.h>

int wxParseCommonDialogsFilter	(	const wxString &	wildCard,
		wxArrayString &	descriptions,
		wxArrayString &	filters
	)

Parses the wildCard, returning the number of filters.

Returns 0 if none or if there's a problem.

The arrays will contain an equal number of items found before the error. On platforms where native dialogs handle only one filter per entry, entries in arrays are automatically adjusted. wildCard is in the form:

    "All files (*)|*|Image Files (*.jpeg *.png)|*.jpg;*.png"

Include file:

#include <wx/filefn.h>

wxString wxPathOnly ( const wxString & path )

Returns the directory part of the filename.

Include file:

#include <wx/filefn.h>

bool wxRemoveFile ( const wxString & file )

Removes file, returning true if successful.

Include file:

#include <wx/filefn.h>

bool wxRenameFile	(	const wxString &	file1,
		const wxString &	file2,
		bool	overwrite = `true`
	)

Renames file1 to file2, returning true if successful.

If file2 is a directory, file1 is moved into it (overwrite is ignored in this case). Otherwise, if file2 is an existing file, it is overwritten if overwrite is true (default) and the function fails if overwrite is false.

Include file:

#include <wx/filefn.h>

bool wxRmdir	(	const wxString &	dir,
		int	flags = `0`
	)

Removes the directory dir, returning true if successful.

Does not work under VMS.

The flags parameter is reserved for future use.

注:: There is also a wxRmDir() function which simply wraps the standard POSIX rmdir() function and so return an integer error code instead of a boolean value (but otherwise is currently identical to wxRmdir()), don't confuse these two functions.

Include file:

#include <wx/filefn.h>

bool wxSetWorkingDirectory ( const wxString & dir )

Sets the current working directory, returning true if the operation succeeded.

Under MS Windows, the current drive is also changed if dir contains a drive specification.

Include file:

#include <wx/filefn.h>

void wxSplitPath	(	const wxString &	fullname,
		wxString *	path,
		wxString *	name,
		wxString *	ext
	)

Deprecated:: This function is obsolete, please use wxFileName::SplitPath() instead.

This function splits a full file name into components: the path (including possible disk/drive specification under Windows), the base name, and the extension. Any of the output parameters (path, name or ext) may be NULL if you are not interested in the value of a particular component.

wxSplitPath() will correctly handle filenames with both DOS and Unix path separators under Windows, however it will not consider backslashes as path separators under Unix (where backslash is a valid character in a filename).

On entry, fullname should be non-NULL (it may be empty though).

On return, path contains the file path (without the trailing separator), name contains the file name and ext contains the file extension without leading dot. All three of them may be empty if the corresponding component is. The old contents of the strings pointed to by these parameters will be overwritten in any case (if the pointers are not NULL).

Include file:

#include <wx/filefn.h>

bool wxTransferFileToStream	(	const wxString &	filename,
		ostream &	stream
	)

Copies the given file to stream.

Useful when converting an old application to use streams (within the document/view framework, for example).

Include file:

#include <wx/docview.h>

bool wxTransferStreamToFile	(	istream &	stream,
		const wxString &	filename
	)

Copies the given stream to the file filename.

Useful when converting an old application to use streams (within the document/view framework, for example).

Include file:

#include <wx/docview.h>

void wxUnix2DosFilename ( wxChar * s )

Converts a Unix to a DOS filename by replacing forward slashes with backslashes.

Deprecated:: Construct a wxFileName with wxPATH_UNIX and then use wxFileName::GetFullPath(wxPATH_DOS) instead.

Include file:

#include <wx/filefn.h>

Variable Documentation

const int wxInvalidOffset = -1

A special return value of many wxWidgets classes to indicate that an invalid offset was given.

Detailed Description

Defines

Typedefs

Enumerations

Functions

Variables

Define Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation