4d1cbdbe17
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16871 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
101 lines
3.4 KiB
TeX
101 lines
3.4 KiB
TeX
\section{\class{wxDataOutputStream}}\label{wxdataoutputstream}
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This class provides functions that write binary data types in a
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portable way. Data can be written in either big-endian or little-endian
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format, little-endian being the default on all architectures.
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If you want to write data to text files (or streams) use
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\helpref{wxTextOutputStream}{wxtextoutputstream} instead.
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The << operator is overloaded and you can use this class like a standard
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C++ iostream. See \helpref{wxDataInputStream}{wxdatainputstream} for its
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usage and caveats.
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See also \helpref{wxDataInputStream}{wxdatainputstream}.
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\wxheading{Derived from}
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None
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxDataOutputStream::wxDataOutputStream}\label{wxdataoutputstreamconstr}
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\func{}{wxDataOutputStream}{\param{wxOutputStream\&}{ stream}}
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\func{}{wxDataOutputStream}{\param{wxOutputStream\&}{ stream}, \param{wxMBConv\&}{ conv = wxMBConvUTF8}}
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Constructs a datastream object from an output stream. Only write methods will
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be available. The second form is only available in Unicode build of wxWindows.
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\wxheading{Parameters}
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\docparam{stream}{The output stream.}
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\docparam{conv}{Charset conversion object object used to encoding Unicode
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strings before writing them to the stream
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in Unicode mode (see \helpref{wxDataOutputStream::WriteString}{wxdataoutputstreamwritestring}
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documentation for detailed description). Note that you must not destroy
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{\it conv} before you destroy this wxDataOutputStream instance! It is
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recommended to use default value (UTF-8).}
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\membersection{wxDataOutputStream::\destruct{wxDataOutputStream}}
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\func{}{\destruct{wxDataOutputStream}}{\void}
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Destroys the wxDataOutputStream object.
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\membersection{wxDataOutputStream::BigEndianOrdered}
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\func{void}{BigEndianOrdered}{\param{bool}{ be\_order}}
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If {\it be\_order} is TRUE, all data will be written in big-endian
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order, e.g. for reading on a Sparc or from Java-Streams (which
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always use big-endian order), otherwise data will be written in
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little-endian order.
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\membersection{wxDataOutputStream::Write8}
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\func{void}{Write8}{{\param wxUint8 }{i8}}
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Writes the single byte {\it i8} to the stream.
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\membersection{wxDataOutputStream::Write16}
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\func{void}{Write16}{{\param wxUint16 }{i16}}
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Writes the 16 bit unsigned integer {\it i16} to the stream.
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\membersection{wxDataOutputStream::Write32}
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\func{void}{Write32}{{\param wxUint32 }{i32}}
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Writes the 32 bit unsigned integer {\it i32} to the stream.
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\membersection{wxDataOutputStream::Write64}
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\func{void}{Write64}{{\param wxUint64 }{i64}}
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Writes the 64 bit unsigned integer {\it i64} to the stream.
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\membersection{wxDataOutputStream::WriteDouble}
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\func{void}{WriteDouble}{{\param double }{f}}
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Writes the double {\it f} to the stream using the IEEE format.
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\membersection{wxDataOutputStream::WriteString}\label{wxdataoutputstreamwritestring}
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\func{void}{WriteString}{{\param const wxString\&}{string}}
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Writes {\it string} to the stream. Actually, this method writes the size of
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the string before writing {\it string} itself.
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In ANSI build of wxWindows, the string is written to the stream in exactly
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same way it is represented in memory. In Unicode build, however, the string
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is first converted to multibyte representation with {\it conv} object passed
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to stream's constructor (consequently, ANSI application can read data
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written by Unicode application, as long as they agree on encoding) and this
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representation is written to the stream. UTF-8 is used by default.
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