+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Name: file.tex
+%% Purpose: wxFile documentation
+%% Author: Vadim Zeitlin
+%% Modified by:
+%% Created: 14.01.02 (extracted from file.tex)
+%% RCS-ID: $Id$
+%% Copyright: (c) Vadim Zeitlin
+%% License: wxWindows license
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
\section{\class{wxFile}}\label{wxfile}
A wxFile performs raw file I/O. This is a very small class designed to
contents of the file is not erased and the file pointer is initially placed at the end of the file;
can not be used with Access(). This is the same as {\bf wxFile::write} if the
file doesn't exist.}
+\twocolitem{{\bf wxFile::write\_excl}}{Open the file securely for writing (Uses O\_EXCL | O\_CREAT).
+Will fail if the file already exists, else create and open it atomically. Useful for opening temporary files without being vulnerable to race exploits.}
\end{twocollist}
Other constants defined elsewhere but used by wxFile functions are wxInvalidOffset which represents an
Destructor will close the file.
-NB: it is not virtual so you should use wxFile polymorphically.
+{\bf NB:} it is not virtual so you should not use wxFile polymorphically.
\membersection{wxFile::Access}\label{wxfileaccess}
\membersection{wxFile::Write}\label{wxfilewrites}
-\func{bool}{Write}{\param{const wxString\& }{s}}
+\func{bool}{Write}{\param{const wxString\& }{s}, \param{wxMBConv\&}{ conv = wxConvLibc}}
Writes the contents of the string to the file, returns TRUE on success.
-\section{\class{wxFFile}}\label{wxffile}
-
-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 {\tt FILE *} handle used
-by standard C IO library (also known as {\tt stdio}).
-
-\wxheading{Derived from}
-
-None.
-
-\wxheading{Include files}
-
-<wx/ffile.h>
-
-\twocolwidtha{7cm}
-\begin{twocollist}\itemsep=0pt%
-\twocolitem{{\bf wxFromStart}}{Count offset from the start of the file}
-\twocolitem{{\bf wxFromCurrent}}{Count offset from the current position of the file pointer}
-\twocolitem{{\bf wxFromEnd}}{Count offset from the end of the file (backwards)}
-\end{twocollist}
-
-\latexignore{\rtfignore{\wxheading{Members}}}
-
-\membersection{wxFFile::wxFFile}\label{wxffileconstr}
-
-\func{}{wxFFile}{\void}
-
-Default constructor.
-
-\func{}{wxFFile}{\param{const char*}{ filename}, \param{const char*}{ mode = "r"}}
-
-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 \helpref{IsOpened}{wxffileisopened} to check that it didn't
-fail.
-
-\func{}{wxFFile}{\param{FILE*}{ fp}}
-
-Opens a file with the given file pointer, which has already been opened.
-
-\wxheading{Parameters}
-
-\docparam{filename}{The filename.}
-
-\docparam{mode}{The mode in which to open the file using standard C strings.
-Note that you should use {\tt "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.}
-
-\docparam{fp}{An existing file descriptor, such as stderr.}
-
-\membersection{wxFFile::\destruct{wxFFile}}
-
-\func{}{\destruct{wxFFile}}{\void}
-
-Destructor will close the file.
-
-NB: it is not virtual so you should {\it not} derive from wxFFile!
-
-\membersection{wxFFile::Attach}\label{wxffileattach}
-
-\func{void}{Attach}{\param{FILE*}{ fp}}
-
-Attaches an existing file pointer to the wxFFile object.
-
-The descriptor should be already opened and it will be closed by wxFFile
-object.
-
-\membersection{wxFFile::Close}\label{wxffileclose}
-
-\func{bool}{Close}{\void}
-
-Closes the file and returns TRUE on success.
-
-\membersection{wxFFile::Detach}\label{wxffiledetach}
-
-\func{void}{Detach}{\void}
-
-Get back a file pointer from wxFFile object - the caller is responsible for closing the file if this
-descriptor is opened. \helpref{IsOpened()}{wxffileisopened} will return FALSE after call to Detach().
-
-\membersection{wxFFile::fp}\label{wxffilefp}
-
-\constfunc{FILE *}{fp}{\void}
-
-Returns the file pointer associated with the file.
-
-\membersection{wxFFile::Eof}\label{wxffileeof}
-
-\constfunc{bool}{Eof}{\void}
-
-Returns TRUE if the an attempt has been made to read {\it past}
-the end of the file.
-
-Note that the behaviour of the file descriptor based class
-\helpref{wxFile}{wxfile} is different as \helpref{wxFile::Eof}{wxfileeof}
-will return TRUE here as soon as the last byte of the file has been
-read.
-
-\membersection{wxFFile::Flush}\label{wxffileflush}
-
-\func{bool}{Flush}{\void}
-
-Flushes the file and returns TRUE on success.
-
-\membersection{wxFFile::IsOpened}\label{wxffileisopened}
-
-\constfunc{bool}{IsOpened}{\void}
-
-Returns TRUE if the file has been opened.
-
-\membersection{wxFFile::Length}\label{wxffilelength}
-
-\constfunc{size\_t}{Length}{\void}
-
-Returns the length of the file.
-
-\membersection{wxFFile::Open}\label{wxffileopen}
-
-\func{bool}{Open}{\param{const char*}{ filename}, \param{const char*}{ mode = "r"}}
-
-Opens the file, returning TRUE if successful.
-
-\wxheading{Parameters}
-
-\docparam{filename}{The filename.}
-
-\docparam{mode}{The mode in which to open the file.}
-
-\membersection{wxFFile::Read}\label{wxffileread}
-
-\func{size\_t}{Read}{\param{void*}{ buffer}, \param{off\_t}{ count}}
-
-Reads the specified number of bytes into a buffer, returning the actual number read.
-
-\wxheading{Parameters}
-
-\docparam{buffer}{A buffer to receive the data.}
-
-\docparam{count}{The number of bytes to read.}
-
-\wxheading{Return value}
-
-The number of bytes read.
-
-\membersection{wxFFile::Seek}\label{wxffileseek}
-
-\func{bool}{Seek}{\param{long }{ofs}, \param{wxSeekMode }{mode = wxFromStart}}
-
-Seeks to the specified position and returs TRUE on success.
-
-\wxheading{Parameters}
-
-\docparam{ofs}{Offset to seek to.}
-
-\docparam{mode}{One of {\bf wxFromStart}, {\bf wxFromEnd}, {\bf wxFromCurrent}.}
-
-\membersection{wxFFile::SeekEnd}\label{wxffileseekend}
-
-\func{bool}{SeekEnd}{\param{long }{ofs = 0}}
-
-Moves the file pointer to the specified number of bytes before the end of the file
-and returns TRUE on success.
-
-\wxheading{Parameters}
-
-\docparam{ofs}{Number of bytes before the end of the file.}
-
-\membersection{wxFFile::Tell}\label{wxffiletell}
-
-\constfunc{size\_t}{Tell}{\void}
-
-Returns the current position.
-
-\membersection{wxFFile::Write}\label{wxffilewrite}
-
-\func{size\_t}{Write}{\param{const void*}{ buffer}, \param{size\_t}{ count}}
-
-Writes the specified number of bytes from a buffer.
-
-\wxheading{Parameters}
-
-\docparam{buffer}{A buffer containing the data.}
-
-\docparam{count}{The number of bytes to write.}
-
-\wxheading{Return value}
-
-Number of bytes written.
-
-\membersection{wxFFile::Write}\label{wxffilewrites}
-
-\func{bool}{Write}{\param{const wxString\& }{s}}
-
-Writes the contents of the string to the file, returns TRUE on success.
+The second argument is only meaningful in Unicode build of wxWindows when
+{\it conv} is used to convert {\it s} to multibyte representation.
projects / wxWidgets.git / blobdiff