wxPython/src/_streams.i

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        _streams.i
   3 // Purpose:     SWIG typemaps and wrappers for wxInputStream
   4 //
   5 // Author:      Robin Dunn
   6 //
   7 // Created:     25-Sept-2000
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2003 by Total Control Software
  10 // Licence:     wxWindows license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // Not a %module
  14
  15
  16 //---------------------------------------------------------------------------
  17
  18 %{
  19 #include "wx/wxPython/pyistream.h"
  20 %}
  21
  22 //---------------------------------------------------------------------------
  23 %newgroup
  24
  25
  26 // Typemaps for wxInputStream
  27 //
  28 // We assume that input params taking a wxInputStream& will *not* take
  29 // ownership of the stream and so we manage it in the typemaps. On the other
  30 // hand, when a paramter expects a wxInputStream* then it does take ownership
  31 // (such as wxFSFile) and so the typemap will make a copy of the stream object
  32 // to give to it.
  33
  34 %typemap(in) wxInputStream&  (wxPyInputStream* temp, bool created) {
  35     if (wxPyConvertSwigPtr($input, (void **)&temp, wxT("wxPyInputStream"))) {
  36         $1 = temp->m_wxis;
  37         created = false;
  38     } else {
  39         PyErr_Clear();  // clear the failure of the wxPyConvert above
  40         $1 = wxPyCBInputStream_create($input, false);
  41         if ($1 == NULL) {
  42             PyErr_SetString(PyExc_TypeError, "Expected wx.InputStream or Python file-like object.");
  43             SWIG_fail;
  44         }
  45         created = true;
  46     }
  47 }
  48 %typemap(freearg) wxInputStream& { if (created$argnum) delete $1; }
  49
  50
  51 %typemap(in) wxInputStream*  (wxPyInputStream* temp) {
  52     if (wxPyConvertSwigPtr($input, (void **)&temp, wxT("wxPyInputStream"))) {
  53         $1 = wxPyCBInputStream_copy((wxPyCBInputStream*)temp->m_wxis);
  54     } else {
  55         PyErr_Clear();  // clear the failure of the wxPyConvert above
  56         $1 = wxPyCBInputStream_create($input, true);
  57         if ($1 == NULL) {
  58             PyErr_SetString(PyExc_TypeError, "Expected wx.InputStream or Python file-like object.");
  59             SWIG_fail;
  60         }
  61     }
  62 }
  63
  64
  65
  66 %typemap(out) wxInputStream* {
  67     wxPyInputStream * _ptr = NULL;
  68
  69     if ($1) {
  70         _ptr = new wxPyInputStream($1);
  71     }
  72     $result = wxPyConstructObject(_ptr, wxT("wxPyInputStream"), $owner);
  73 }
  74
  75
  76 //---------------------------------------------------------------------------
  77
  78 enum wxSeekMode
  79 {
  80   wxFromStart,
  81   wxFromCurrent,
  82   wxFromEnd
  83 };
  84
  85
  86 %rename(InputStream) wxPyInputStream;
  87 class wxPyInputStream
  88 {
  89 public:
  90     %extend {
  91         wxPyInputStream(PyObject* p) {
  92             wxInputStream* wxis = wxPyCBInputStream::create(p);
  93             if (wxis)
  94                 return new wxPyInputStream(wxis);
  95             else
  96                 return NULL;
  97         }
  98     }
  99     ~wxPyInputStream();
 100
 101     void close();
 102     void flush();
 103     bool eof();
 104     PyObject* read(int size=-1);
 105     PyObject* readline(int size=-1);
 106     PyObject* readlines(int sizehint=-1);
 107     void seek(int offset, int whence=0);
 108     int tell();
 109
 110     /*
 111       bool isatty();
 112       int fileno();
 113       void truncate(int size=-1);
 114       void write(wxString data);
 115       void writelines(wxStringPtrList);
 116     */
 117
 118     char Peek();
 119     char GetC();
 120     size_t LastRead();
 121     bool CanRead();
 122     bool Eof();
 123     bool Ungetch(char c);
 124
 125     long SeekI(long pos, wxSeekMode mode = wxFromStart);
 126     long TellI();
 127 };
 128
 129
 130
 131 // TODO:  make a more fully implemented file interface...
 132 class wxOutputStream {
 133 public:
 134     /*
 135       void close();
 136       void flush();
 137       wxString* read(int size=-1);
 138       wxString* readline(int size=-1);
 139       wxStringPtrList* readlines(int sizehint=-1);
 140       void seek(int offset, int whence=0);
 141       int tell();
 142       bool isatty();
 143       int fileno();
 144       void truncate(int size=-1);
 145       void write(wxString data);
 146       void writelines(wxStringPtrList);
 147     */
 148
 149     %extend {
 150         void write(PyObject* obj) {
 151             // We use only strings for the streams, not unicode
 152             PyObject* str = PyObject_Str(obj);
 153             if (! str) {
 154                 PyErr_SetString(PyExc_TypeError, "Unable to convert to string");
 155                 return;
 156             }
 157             self->Write(PyString_AS_STRING(str),
 158                         PyString_GET_SIZE(str));
 159             Py_DECREF(str);
 160         }
 161     }
 162     size_t LastWrite() const;
 163 };
 164
 165
 166 //---------------------------------------------------------------------------
 167 %init %{
 168     wxPyPtrTypeMap_Add("wxInputStream", "wxPyInputStream");
 169 %}
 170 //---------------------------------------------------------------------------