interface/wx/sstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sstream.h
   3 // Purpose:     interface of wxStringInputStream
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxStringInputStream
  11
  12     This class implements an input stream which reads data from a string.
  13     It supports seeking.
  14
  15     @library{wxbase}
  16     @category{streams}
  17 */
  18 class wxStringInputStream : public wxInputStream
  19 {
  20 public:
  21     /**
  22         Creates a new read-only stream using the specified string.
  23
  24         Note that the string is copied by the stream so if the original string is
  25         modified after using this constructor, changes to it are not reflected
  26         when reading from stream.
  27     */
  28     wxStringInputStream(const wxString& s);
  29 };
  30
  31
  32
  33 /**
  34     @class wxStringOutputStream
  35
  36     This class implements an output stream which writes data either to a
  37     user-provided or internally allocated string.
  38
  39     Note that currently this stream does not support seeking but can tell
  40     its current position.
  41
  42     @library{wxbase}
  43     @category{streams}
  44 */
  45 class wxStringOutputStream : public wxOutputStream
  46 {
  47 public:
  48     /**
  49         Construct a new stream object writing the data to a string.
  50
  51         If the provided pointer is non-@NULL, data will be written to it.
  52         Otherwise, an internal string is used for the data written to this
  53         stream, use GetString() to get access to it.
  54
  55         If @a str is used, data written to the stream is appended to the current
  56         contents of it, i.e. the string is not cleared here. However if it is not
  57         empty, the positions returned by wxOutputStream::TellO will be offset by
  58         the initial string length, i.e. initial stream position will be the
  59         initial length of the string and not 0.
  60
  61         Notice that the life time of @a conv must be greater than the life time
  62         of this object itself as it stores a reference to it. Also notice that
  63         with default value of this argument the data written to the stream must
  64         be valid UTF-8, pass @c wxConvISO8859_1 to deal with arbitrary 8 bit data.
  65     */
  66     wxStringOutputStream(wxString* pString = 0, wxMBConv& conv = wxConvUTF8);
  67
  68     /**
  69         Returns the string containing all the data written to the stream so far.
  70     */
  71     const wxString& GetString() const;
  72 };
  73