// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+
+
+/**
+ Values used for both wxFile and wxFFile.
+
+ @todo make the value names uppercase
+*/
+enum wxSeekMode
+{
+ wxFromStart,
+ wxFromCurrent,
+ wxFromEnd
+};
+
+/**
+ See wxFFile::GetKind().
+*/
+enum wxFileKind
+{
+ wxFILE_KIND_UNKNOWN,
+ wxFILE_KIND_DISK, /**< A file supporting seeking to arbitrary offsets. */
+ wxFILE_KIND_TERMINAL, /**< A terminal. */
+ wxFILE_KIND_PIPE /**< A pipe. */
+};
+
+
/**
@class wxFFile
@wxheader{ffile.h}
- wxFFile implements buffered file I/O. This is a very small class designed to
- minimize the overhead of using it - in fact, there is hardly any overhead at
- all, but using it brings you automatic error checking and hides differences
- between platforms and compilers. It wraps inside it a @c FILE * handle used
- by standard C IO library (also known as @c stdio).
+ wxFFile implements buffered file I/O.
+
+ This is a very small class designed to minimize the overhead of using it - in fact,
+ there is hardly any overhead at all, but using it brings you automatic error checking
+ and hides differences between platforms and compilers.
+
+ It wraps inside it a @c FILE * handle used by standard C IO library (also known as @c stdio).
@library{wxbase}
@category{file}
class wxFFile
{
public:
- //@{
+ wxFFile();
+
/**
Opens a file with the given file pointer, which has already been opened.
+ @param fp
+ An existing file descriptor, such as stderr.
+ */
+ wxFFile(FILE* fp);
+
+ /**
+ Opens a file with the given mode.
+ As there is no way to return whether the operation was successful or not from
+ the constructor you should test the return value of IsOpened() to check that it
+ didn't fail.
+
@param filename
The filename.
@param mode
Note that you should use "b" flag if you use binary files under Windows
or the results might be unexpected due to automatic newline conversion done
for the text files.
- @param fp
- An existing file descriptor, such as stderr.
*/
- wxFFile();
wxFFile(const wxString& filename, const wxString& mode = "r");
- wxFFile(FILE* fp);
- //@}
+
/**
Destructor will close the file.
- NB: it is not virtual so you should @e not derive from wxFFile!
+
+ @note it is not virtual so you should @e not derive from wxFFile!
*/
~wxFFile();
/**
Attaches an existing file pointer to the wxFFile object.
- The descriptor should be already opened and it will be closed by wxFFile
- object.
+
+ The descriptor should be already opened and it will be closed by wxFFile object.
*/
void Attach(FILE* fp);
/**
Get back a file pointer from wxFFile object -- the caller is responsible for
- closing the file if this
- descriptor is opened. IsOpened() will return @false after call to Detach().
+ closing the file if this descriptor is opened.
+
+ IsOpened() will return @false after call to Detach().
*/
void Detach();
/**
Returns @true if the an attempt has been made to read @e past
the end of the file.
- Note that the behaviour of the file descriptor based class
- wxFile is different as wxFile::Eof
- will return @true here as soon as the last byte of the file has been
- read.
+
+ Note that the behaviour of the file descriptor based class wxFile is different as
+ wxFile::Eof() will return @true here as soon as the last byte of the file has been read.
+
Also note that this method may only be called for opened files and may crash if
the file is not opened.
+ @todo THIS METHOD MAY CRASH? DOESN'T SOUND GOOD
+
@see IsOpened()
*/
bool Eof() const;
/**
Returns @true if an error has occurred on this file, similar to the standard
@c ferror() function.
+
Please note that this method may only be called for opened files and may crash
if the file is not opened.
+ @todo THIS METHOD MAY CRASH? DOESN'T SOUND GOOD
+
@see IsOpened()
*/
-
+ bool Error() const;
/**
Flushes the file and returns @true on success.
bool Flush();
/**
- Returns the type of the file. Possible return values are:
+ Returns the type of the file.
+
+ @see wxFileKind
*/
wxFileKind GetKind() const;
/**
- Returns @true if the file is opened. Most of the methods of this class may
- only
- be used for an opened file.
+ Returns @true if the file is opened.
+
+ Most of the methods of this class may only be used for an opened file.
*/
bool IsOpened() const;
bool Open(const wxString& filename, const wxString& mode = "r");
/**
- Reads the specified number of bytes into a buffer, returning the actual number
- read.
+ Reads the specified number of bytes into a buffer, returning the actual number read.
@param buffer
A buffer to receive the data.
@param count
The number of bytes to read.
- @returns The number of bytes read.
+ @return The number of bytes read.
*/
size_t Read(void* buffer, size_t count);
/**
- )
Reads the entire contents of the file into a string.
@param str
Conversion object to use in Unicode build; by default supposes
that file contents is encoded in UTF-8.
- @returns @true if file was read successfully, @false otherwise.
+ @return @true if file was read successfully, @false otherwise.
*/
- bool ReadAll(wxString* str);
+ bool ReadAll(wxString* str, const wxMBConv& conv = wxConvAuto());
/**
Seeks to the specified position and returns @true on success.
/**
Moves the file pointer to the specified number of bytes before the end of the
- file
- and returns @true on success.
+ file and returns @true on success.
@param ofs
Number of bytes before the end of the file.
wxFileOffset Tell() const;
/**
- )
Writes the contents of the string to the file, returns @true on success.
+
The second argument is only meaningful in Unicode build of wxWidgets when
- @e conv is used to convert @a s to multibyte representation.
+ @a conv is used to convert @a str to multibyte representation.
+ */
+ bool Write(const wxString& str, const wxMBConv& conv = wxConvAuto());
+
+ /**
+ Writes the specified number of bytes from a buffer.
+
+ @param buffer
+ A buffer containing the data.
+ @param count
+ The number of bytes to write.
+
+ @return The number of bytes written.
*/
- bool Write(const wxString& s);
+ size_t Write(const void* buffer, size_t count);
/**
Returns the file pointer associated with the file.
projects / wxWidgets.git / blobdiff