## wxDataInputStream

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 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:

      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

See also wxDataOutputStream.

Derived from

None

Include files

<wx/datstrm.h>

Members

wxDataInputStream::wxDataInputStream
wxDataInputStream::~wxDataInputStream
wxDataInputStream::BigEndianOrdered
wxDataInputStream::Read8
wxDataInputStream::Read16
wxDataInputStream::Read32
wxDataInputStream::ReadDouble
wxDataInputStream::ReadString

### wxDataInputStream::wxDataInputStream

wxDataInputStream(wxInputStream& stream)

Constructs a datastream object from an input stream. Only read methods will be available.

Parameters

stream

The input stream.

### wxDataInputStream::~wxDataInputStream

~wxDataInputStream()

Destroys the wxDataInputStream object.

### wxDataInputStream::BigEndianOrdered

void BigEndianOrdered(bool be_order)

If 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).

### wxDataInputStream::Read8

wxUint8 Read8()

Reads a single byte from the stream.

### wxDataInputStream::Read16

wxUint16 Read16()

Reads a 16 bit integer from the stream.

### wxDataInputStream::Read32

wxUint32 Read32()

Reads a 32 bit integer from the stream.

### wxDataInputStream::ReadDouble

double ReadDouble()

Reads a double (IEEE encoded) from the stream.

### wxDataInputStream::ReadString

wxString ReadString()

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.