+% ----------------------------------------------------------------------------
+% wxDataInputStream
+% ----------------------------------------------------------------------------
\section{\class{wxDataInputStream}}\label{wxdatainputstream}
-This class provides functions that read data types in a
-portable way. So, a file written by an Intel processor can be read by a
-Sparc or anything else.
+This class provides functions that read binary data types in a
+portable way. Data can be read in either big-endian or litte-endian
+format, little-endian being the default on all architectures.
+
+If you want to read data from text files (or streams) use
+\helpref{wxTextInputStream}{wxtextinputstream} instead.
+
+The >> operator is overloaded and you can use this class like a standard C++ iostream.
+Note, however, that the arguments are the fixed size types wxUint32, wxInt32 etc
+and on a typical 32-bit computer, none of these match to the "long" type (wxInt32
+is defined as signed int on 32-bit architectures) so that you cannot use long. To avoid
+problems (here and elsewhere), make use of the wxInt32, wxUint32, etc types.
+
+For example:
+
+\begin{verbatim}
+ wxFileInputStream input( "mytext.dat" );
+ wxDataInputStream store( input );
+ wxUint8 i1;
+ float f2;
+ wxString line;
+
+ store >> i1; // read a 8 bit integer.
+ store >> i1 >> f2; // read a 8 bit integer followed by float.
+ store >> line; // read a text line
+\end{verbatim}
+
+See also \helpref{wxDataOutputStream}{wxdataoutputstream}.
\wxheading{Derived from}
-\helpref{wxFilterInputStream}{wxfilterinputstream}\\
-\helpref{wxInputStream}{wxinputstream}\\
-\helpref{wxStreamBase}{wxstreambase}
+None
\wxheading{Include files}
Destroys the wxDataInputStream object.
+\membersection{wxDataInputStream::BigEndianOrdered}
+
+\func{void}{BigEndianOrdered}{\param{bool}{ be\_order}}
+
+If {\it be\_order} is TRUE, all data will be read in big-endian
+order, such as written by programs on a big endian architecture
+(e.g. Sparc) or written by Java-Streams (which always use
+big-endian order).
+
\membersection{wxDataInputStream::Read8}
-\func{unsigned char}{Read8}{\void}
+\func{wxUint8}{Read8}{\void}
Reads a single byte from the stream.
\membersection{wxDataInputStream::Read16}
-\func{unsigned short}{Read16}{\void}
+\func{wxUint16}{Read16}{\void}
Reads a 16 bit integer from the stream.
\membersection{wxDataInputStream::Read32}
-\func{unsigned long}{Read32}{\void}
+\func{wxUint32}{Read32}{\void}
Reads a 32 bit integer from the stream.
Reads a double (IEEE encoded) from the stream.
-\membersection{wxDataInputStream::ReadLine}
-
-\func{wxString}{wxDataInputStream::ReadLine}{\void}
-
-Reads a line from the stream. A line is a string which ends with \\n or \\r\\n.
-
\membersection{wxDataInputStream::ReadString}
-\func{wxString}{wxDataInputStream::ReadString}{\void}
+\func{wxString}{ReadString}{\void}
Reads a string from a stream. Actually, this function first reads a long integer
specifying the length of the string (without the last null character) and then
reads the string.
+% ----------------------------------------------------------------------------
+% wxDataOutputStream
+% ----------------------------------------------------------------------------
+
\section{\class{wxDataOutputStream}}\label{wxdataoutputstream}
-This class provides functions that write data types in a
-portable way. So, a file written by an Intel processor can be read by a
-Sparc or anything else.
+This class provides functions that write binary data types in a
+portable way. Data can be written in either big-endian or litte-endian
+format, little-endian being the default on all architectures.
+
+If you want to write data to text files (or streams) use
+\helpref{wxTextOutputStream}{wxtextoutputstream} instead.
+
+The << operator is overloaded and you can use this class like a standard
+C++ iostream. See \helpref{wxDataInputStream}{wxdatainputstream} for its
+usage and caveats.
+
+See also \helpref{wxDataInputStream}{wxdatainputstream}.
+
+\wxheading{Derived from}
+
+None
\latexignore{\rtfignore{\wxheading{Members}}}
\membersection{wxDataOutputStream::wxDataOutputStream}\label{wxdataoutputstreamconstr}
-\func{}{wxDataInputStream}{\param{wxOutputStream\&}{ stream}}
+\func{}{wxDataOutputStream}{\param{wxOutputStream\&}{ stream}}
-Constructs a datastream object from an output stream. Only read methods will
+Constructs a datastream object from an output stream. Only write methods will
be available.
\wxheading{Parameters}
Destroys the wxDataOutputStream object.
+\membersection{wxDataOutputStream::BigEndianOrdered}
+
+\func{void}{BigEndianOrdered}{\param{bool}{ be\_order}}
+
+If {\it be\_order} is TRUE, all data will be written in big-endian
+order, e.g. for reading on a Sparc or from Java-Streams (which
+always use big-endian order), otherwise data will be written in
+little-endian order.
+
\membersection{wxDataOutputStream::Write8}
-\func{void}{wxDataOutputStream::Write8}{{\param unsigned char }{i8}}
+\func{void}{Write8}{{\param wxUint8 }{i8}}
Writes the single byte {\it i8} to the stream.
\membersection{wxDataOutputStream::Write16}
-\func{void}{wxDataOutputStream::Write16}{{\param unsigned short }{i16}}
+\func{void}{Write16}{{\param wxUint16 }{i16}}
Writes the 16 bit integer {\it i16} to the stream.
\membersection{wxDataOutputStream::Write32}
-\func{void}{wxDataOutputStream::Write32}{{\param unsigned long }{i32}}
+\func{void}{Write32}{{\param wxUint32 }{i32}}
Writes the 32 bit integer {\it i32} to the stream.
\membersection{wxDataOutputStream::WriteDouble}
-\func{void}{wxDataOutputStream::WriteDouble}{{\param double }{f}}
+\func{void}{WriteDouble}{{\param double }{f}}
Writes the double {\it f} to the stream using the IEEE format.
-\membersection{wxDataOutputStream::WriteLine}
-
-\func{void}{wxDataOutputStream::WriteLine}{{\param const wxString\& }{string}}
-
-Writes {\it string} as a line. Depending on the operating system, it adds
-$\backslash$n or $\backslash$r$\backslash$n.
-
\membersection{wxDataOutputStream::WriteString}
-\func{void}{wxDataOutputStream::WriteString}{{\param const wxString\& }{string}}
+\func{void}{WriteString}{{\param const wxString\& }{string}}
Writes {\it string} to the stream. Actually, this method writes the size of
the string before writing {\it string} itself.
projects / wxWidgets.git / blobdiff