Wxwidgets file functions

Note that the behaviour of the file pointer-based class wxFFile is different as wxFFile::Eof will return true here only if an attempt has been made to read past the last byte of the file, while wxFile::Eof will return true even before such attempt is made if the file pointer is at the last position in the file. Note also that this function doesn't work on unseekable file descriptors examples include pipes, terminals and sockets under Unix and an attempt to use it will result in an error message.

So, to read the entire file into memory, you should write a loop which uses Read repeatedly and tests its return condition instead of using Eof as this will not work for special files under Unix. Returns true if the given name specifies an existing regular file not a directory or a link.

Note that Flush is not implemented on some Windows compilers due to a missing fsync function, which reduces the usefulness of this function it can still be called but it will do nothing on unsupported compilers. The error code is system-dependent and corresponds to the value of the standard errno variable when the last error occurred. Notice that only simple accessors such as IsOpened and Eof and this method itself don't modify the last error value, all other methods can potentially change it if an error occurs, including the const ones such as Tell or Length.

Returns the current position or wxInvalidOffset if file is not opened or if another error occurred. 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 conv is used to convert s to a multibyte representation.

Note that this method only works with NUL-terminated strings, if you want to write data with embedded NULs to the file you should use the other Write overload. Version: 3. Library: wxBase. Category: File Handling. Standard file descriptors. Enumerator read Open file for reading or test if it can be opened for reading with Access write Open file for writing deleting the contents of the file if it already exists or test if it can be opened for writing with Access.

This is the same as OpenMode::write if the file doesn't exist. Opens a file with a filename. Parameters filename The filename. Converts URL into a well-formed filename. The URL must use the file protocol. GetPath const. Public Member Functions inherited from wxObject. Default ctor; initializes to NULL the internal reference data. GetClassInfo const. GetRefData const.

Determines whether this class is a subclass of or the same class as the given class. Returns true if this object has the same data pointer as obj. Makes this object refer to the data in clone.

However, we do assume that the values correspond to the Unix umask bits. Concatenates src1 and src2 to dest , 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.

Returns the filename for a full path. The second form returns a pointer to temporary storage that should not be deallocated. 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 ". Returns the next file that matches the path passed to wxFindFirstFile.

See wxFindFirstFile for an example. Possible return values are enumerations of wxFileKind. 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.

Returns true if the argument is an absolute filename, i. 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. Process Control The functions in this section are used to launch or terminate the other processes. Strings Global string functions and macros. Time The functions in this section deal with getting the current time and sleeping for the specified time interval.

Versioning The following constants are defined in wxWidgets: Wrappers of CRT functions For documentation of these functions please refer to the documentation of the standard CRT functions see e. Application Initialization and Termination. Atomic Operations. When using multi-threaded applications, it is often required to access or modify memory which is shared between threads. Byte Order.