+ // check if we have a real wxInputStream to work with
+ if (!m_wxis) {
+ bool blocked = wxPyBeginBlockThreads();
+ PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream");
+ wxPyEndBlockThreads(blocked);
+ return NULL;
+ }
+
+ // init list
+ bool blocked = wxPyBeginBlockThreads();
+ pylist = PyList_New(0);
+ wxPyEndBlockThreads(blocked);
+
+ if (!pylist) {
+ bool blocked = wxPyBeginBlockThreads();
+ PyErr_NoMemory();
+ wxPyEndBlockThreads(blocked);
+ return NULL;
+ }
+
+ // read sizehint bytes or until EOF
+ int i;
+ for (i=0; (m_wxis->CanRead()) && ((sizehint < 0) || (i < sizehint));) {
+ PyObject* s = this->readline();
+ if (s == NULL) {
+ bool blocked = wxPyBeginBlockThreads();
+ Py_DECREF(pylist);
+ wxPyEndBlockThreads(blocked);
+ return NULL;
+ }
+ bool blocked = wxPyBeginBlockThreads();
+ PyList_Append(pylist, s);
+ i += PyString_Size(s);
+ wxPyEndBlockThreads(blocked);
+ }
+
+ // error check
+ wxStreamError err = m_wxis->GetLastError();
+ if (err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF) {
+ bool blocked = wxPyBeginBlockThreads();
+ Py_DECREF(pylist);
+ PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
+ wxPyEndBlockThreads(blocked);
+ return NULL;
+ }
+
+ return pylist;
+}
+
+
+void wxPyInputStream::seek(int offset, int whence) {
+ if (m_wxis)
+ m_wxis->SeekI(offset, wxSeekMode(whence));
+}
+
+int wxPyInputStream::tell(){
+ if (m_wxis)
+ return m_wxis->TellI();
+ else return 0;
+}
+
+
+
+
+wxPyCBInputStream::wxPyCBInputStream(PyObject *r, PyObject *s, PyObject *t, bool block)
+ : wxInputStream(), m_read(r), m_seek(s), m_tell(t), m_block(block)
+{}
+
+
+wxPyCBInputStream::~wxPyCBInputStream() {
+ bool blocked=false;
+ if (m_block) blocked = wxPyBeginBlockThreads();
+ Py_XDECREF(m_read);
+ Py_XDECREF(m_seek);
+ Py_XDECREF(m_tell);
+ if (m_block) wxPyEndBlockThreads(blocked);
+}
+
+
+wxPyCBInputStream* wxPyCBInputStream::create(PyObject *py, bool block) {
+ bool blocked=false;
+ if (block) blocked = wxPyBeginBlockThreads();
+
+ PyObject* read = getMethod(py, "read");
+ PyObject* seek = getMethod(py, "seek");
+ PyObject* tell = getMethod(py, "tell");
+
+ if (!read) {
+ PyErr_SetString(PyExc_TypeError, "Not a file-like object");
+ Py_XDECREF(read);
+ Py_XDECREF(seek);
+ Py_XDECREF(tell);
+ if (block) wxPyEndBlockThreads(blocked);
+ return NULL;
+ }
+
+ if (block) wxPyEndBlockThreads(blocked);
+ return new wxPyCBInputStream(read, seek, tell, block);
+}
+
+
+wxPyCBInputStream* wxPyCBInputStream_create(PyObject *py, bool block) {
+ return wxPyCBInputStream::create(py, block);
+}
+
+PyObject* wxPyCBInputStream::getMethod(PyObject* py, char* name) {
+ if (!PyObject_HasAttrString(py, name))
+ return NULL;
+ PyObject* o = PyObject_GetAttrString(py, name);
+ if (!PyMethod_Check(o) && !PyCFunction_Check(o)) {
+ Py_DECREF(o);
+ return NULL;
+ }
+ return o;
+}
+
+
+wxFileOffset wxPyCBInputStream::GetLength() const {
+ wxPyCBInputStream* self = (wxPyCBInputStream*)this; // cast off const
+ if (m_seek && m_tell) {
+ wxFileOffset temp = self->OnSysTell();
+ wxFileOffset ret = self->OnSysSeek(0, wxFromEnd);
+ self->OnSysSeek(temp, wxFromStart);
+ return ret;
+ }
+ else
+ return wxInvalidOffset;
+}
+
+
+size_t wxPyCBInputStream::OnSysRead(void *buffer, size_t bufsize) {
+ if (bufsize == 0)
+ return 0;
+
+ bool blocked = wxPyBeginBlockThreads();
+ PyObject* arglist = Py_BuildValue("(i)", bufsize);
+ PyObject* result = PyEval_CallObject(m_read, arglist);
+ Py_DECREF(arglist);
+
+ size_t o = 0;
+ if ((result != NULL) && PyString_Check(result)) {
+ o = PyString_Size(result);
+ if (o == 0)
+ m_lasterror = wxSTREAM_EOF;
+ if (o > bufsize)
+ o = bufsize;
+ memcpy((char*)buffer, PyString_AsString(result), o); // strings only, not unicode...
+ Py_DECREF(result);
+
+ }
+ else
+ m_lasterror = wxSTREAM_READ_ERROR;
+ wxPyEndBlockThreads(blocked);
+ return o;
+}
+
+size_t wxPyCBInputStream::OnSysWrite(const void *buffer, size_t bufsize) {
+ m_lasterror = wxSTREAM_WRITE_ERROR;
+ return 0;
+}
+
+
+wxFileOffset wxPyCBInputStream::OnSysSeek(wxFileOffset off, wxSeekMode mode) {
+ bool blocked = wxPyBeginBlockThreads();
+ PyObject* arglist = PyTuple_New(2);
+
+ if (sizeof(wxFileOffset) > sizeof(long))
+ // wxFileOffset is a 64-bit value...
+ PyTuple_SET_ITEM(arglist, 0, PyLong_FromLongLong(off));
+ else
+ PyTuple_SET_ITEM(arglist, 0, PyInt_FromLong(off));
+
+ PyTuple_SET_ITEM(arglist, 1, PyInt_FromLong(mode));
+
+
+ PyObject* result = PyEval_CallObject(m_seek, arglist);
+ Py_DECREF(arglist);
+ Py_XDECREF(result);
+ wxPyEndBlockThreads(blocked);
+ return OnSysTell();
+}
+
+
+wxFileOffset wxPyCBInputStream::OnSysTell() const {
+ bool blocked = wxPyBeginBlockThreads();
+ PyObject* arglist = Py_BuildValue("()");
+ PyObject* result = PyEval_CallObject(m_tell, arglist);
+ Py_DECREF(arglist);
+ wxFileOffset o = 0;
+ if (result != NULL) {
+ if (PyLong_Check(result))
+ o = PyLong_AsLongLong(result);
+ else
+ o = PyInt_AsLong(result);
+ Py_DECREF(result);
+ };
+ wxPyEndBlockThreads(blocked);
+ return o;
+}
+
+//----------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxPyCallback, wxEvtHandler);
projects / wxWidgets.git / blobdiff