[wxWidgets.git] / docs / latex / wx / strmbase.tex

% -----------------------------------------------------------------------------
% wxStreamBase
% -----------------------------------------------------------------------------
\section{\class{wxStreamBase}}\label{wxstreambase}

\wxheading{Derived from}

None

\wxheading{See also}

\helpref{wxStreamBuffer}{wxstreambuffer}

% -----------------------------------------------------------------------------
% Members
% -----------------------------------------------------------------------------
\latexignore{\rtfignore{\wxheading{Members}}} 

% -----------
% ctor & dtor
% -----------

\membersection{wxStreamBase::wxStreamBase}

\func{}{wxStreamBase}{\void}

Creates a dummy stream object. It doesn't do anything.

\membersection{wxStreamBase::\destruct{wxStreamBase}}

\func{}{\destruct{wxStreamBase}}{\void}

Destructor.

\membersection{wxStreamBase::LastError}\label{wxstreambaselasterror}

\constfunc{wxStreamError}{LastError}{\void}

This function returns the last error.
\twocolwidtha{5cm}
\begin{twocollist}\itemsep=0pt
\twocolitem{{\bf wxStream_NOERROR}}{No error occured.}
\twocolitem{{\bf wxStream_EOF}}{An End-Of-File occured.}
\twocolitem{{\bf wxStream_WRITE_ERR}}{A generic error occured on the last write call.}
\twocolitem{\bf wxStream_READ_ERR}{A generic error occured on the last read call.}
\end{twocollist}

\membersection{wxStreamBase::StreamSize}
\constfunc{size_t}{StreamSize}{\void}

This function returns the size of the stream. For example, for a file it is the size of
the file).

\wxheading{Warning}

There are streams which do not have size by definition, such as socket streams.
In that cases, StreamSize returns an invalid size represented by
\begin{verbatim}
~(size_t)0
\end{verbatim}

\membersection{wxStreamBase::OnSysRead}\label{wxstreambaseonsysread}

\func{size_t}{OnSysRead}{\param{void*}{ buffer}, \param{size_t}{ bufsize}}

Internal function. It is called when the stream buffer needs a buffer of the
specified size. It should return the size that was actually read.

\membersection{wxStreamBase::OnSysWrite}

\func{size_t}{OnSysWrite}{\param{void *}{buffer}, \param{size_t}{ bufsize}}

See \helpref{OnSysRead}{wxstreambaseonsysread}.

\membersection{wxStreamBase::OnSysSeek}

\func{off_t}{OnSysSeek}{\param{off_t}{ pos}, \param{wxSeekMode}{ mode}}

Internal function. It is called when the stream buffer needs to change the
current position in the stream. See \helpref{wxStreamBuffer::Seek}{wxstreambufferseek}

\membersection{wxStreamBase::OnSysTell}

\constfunc{off_t}{OnSysTell}{\void}

Internal function. Is is called when the stream buffer needs to know the
real position in the stream.
Commit	Line	Data
e2a6f233 JS	1	% -----------------------------------------------------------------------------
	2	% wxStreamBase
	3	% -----------------------------------------------------------------------------
	4	\section{\class{wxStreamBase}}\label{wxstreambase}
	5
	6	\wxheading{Derived from}
	7
	8	None
	9
	10	\wxheading{See also}
	11
	12	\helpref{wxStreamBuffer}{wxstreambuffer}
	13
	14	% -----------------------------------------------------------------------------
	15	% Members
	16	% -----------------------------------------------------------------------------
	17	\latexignore{\rtfignore{\wxheading{Members}}}
	18
	19	% -----------
	20	% ctor & dtor
	21	% -----------
	22
	23	\membersection{wxStreamBase::wxStreamBase}
	24
	25	\func{}{wxStreamBase}{\void}
	26
da3aea64	27	Creates a dummy stream object. It doesn't do anything.
e2a6f233 JS	28
	29	\membersection{wxStreamBase::\destruct{wxStreamBase}}
	30
	31	\func{}{\destruct{wxStreamBase}}{\void}
	32
	33	Destructor.
	34
	35	\membersection{wxStreamBase::LastError}\label{wxstreambaselasterror}
	36
	37	\constfunc{wxStreamError}{LastError}{\void}
	38
	39	This function returns the last error.
07b73270 GL	40	\twocolwidtha{5cm}
	41	\begin{twocollist}\itemsep=0pt
	42	\twocolitem{{\bf wxStream_NOERROR}}{No error occured.}
	43	\twocolitem{{\bf wxStream_EOF}}{An End-Of-File occured.}
	44	\twocolitem{{\bf wxStream_WRITE_ERR}}{A generic error occured on the last write call.}
	45	\twocolitem{\bf wxStream_READ_ERR}{A generic error occured on the last read call.}
	46	\end{twocollist}
e2a6f233 JS	47
	48	\membersection{wxStreamBase::StreamSize}
	49	\constfunc{size_t}{StreamSize}{\void}
	50
	51	This function returns the size of the stream. For example, for a file it is the size of
da3aea64 GL	52	the file).
	53
	54	\wxheading{Warning}
	55
	56	There are streams which do not have size by definition, such as socket streams.
	57	In that cases, StreamSize returns an invalid size represented by
	58	\begin{verbatim}
	59	~(size_t)0
	60	\end{verbatim}
e2a6f233 JS	61
	62	\membersection{wxStreamBase::OnSysRead}\label{wxstreambaseonsysread}
	63
	64	\func{size_t}{OnSysRead}{\param{void*}{ buffer}, \param{size_t}{ bufsize}}
	65
	66	Internal function. It is called when the stream buffer needs a buffer of the
	67	specified size. It should return the size that was actually read.
	68
	69	\membersection{wxStreamBase::OnSysWrite}
	70
	71	\func{size_t}{OnSysWrite}{\param{void *}{buffer}, \param{size_t}{ bufsize}}
	72
	73	See \helpref{OnSysRead}{wxstreambaseonsysread}.
	74
	75	\membersection{wxStreamBase::OnSysSeek}
	76
	77	\func{off_t}{OnSysSeek}{\param{off_t}{ pos}, \param{wxSeekMode}{ mode}}
	78
	79	Internal function. It is called when the stream buffer needs to change the
	80	current position in the stream. See \helpref{wxStreamBuffer::Seek}{wxstreambufferseek}
	81
	82	\membersection{wxStreamBase::OnSysTell}
	83
	84	\constfunc{off_t}{OnSysTell}{\void}
	85
	86	Internal function. Is is called when the stream buffer needs to know the
7f42cff1	87	real position in the stream.
e2a6f233	88