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 lineSee 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(wxInputStream& stream)
Constructs a datastream object from an input stream. Only read methods will be available.
Parameters
stream
~wxDataInputStream()
Destroys the wxDataInputStream object.
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).
wxUint8 Read8()
Reads a single byte from the stream.
wxUint16 Read16()
Reads a 16 bit integer from the stream.
wxUint32 Read32()
Reads a 32 bit integer from the stream.
double ReadDouble()
Reads a double (IEEE encoded) from the stream.
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.