- // C++
-// definitions of wxStringPtrList and wxPyInputStream
-#include <wx/listimpl.cpp>
-WX_DEFINE_LIST(wxStringPtrList);
-
-
-void wxPyInputStream::close() {
- /* do nothing */
-}
-
-void wxPyInputStream::flush() {
- /*do nothing*/
-}
-
-bool wxPyInputStream::eof() {
- if (wxi)
- return wxi->Eof();
- else
- return TRUE;
-}
-
-wxPyInputStream::~wxPyInputStream() {
- /*do nothing*/
-}
-
-wxString* wxPyInputStream::read(int size) {
- wxString* s = NULL;
- const int BUFSIZE = 1024;
-
- // check if we have a real wxInputStream to work with
- if (!wxi) {
- PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream below");
- return NULL;
- }
-
- if (size < 0) {
- // init buffers
- char * buf = new char[BUFSIZE];
- if (!buf) {
- PyErr_NoMemory();
- return NULL;
- }
-
- s = new wxString();
- if (!s) {
- delete buf;
- PyErr_NoMemory();
- return NULL;
- }
-
- // read until EOF
- while (! wxi->Eof()) {
- wxi->Read(buf, BUFSIZE);
- //*s += wxString(buf, wxi->LastRead());
- s->Append(buf, wxi->LastRead());
- }
- delete buf;
-
- // error check
- if (wxi->LastError() == wxSTREAM_READ_ERROR) {
- delete s;
- PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
- return NULL;
- }
-
- } else { // Read only size number of characters
- s = new wxString;
- if (!s) {
- PyErr_NoMemory();
- return NULL;
- }
-
- // read size bytes
- wxi->Read(s->GetWriteBuf(size+1), size);
- s->UngetWriteBuf(wxi->LastRead());
-
- // error check
- if (wxi->LastError() == wxSTREAM_READ_ERROR) {
- delete s;
- PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
- return NULL;
- }
- }
- return s;
-}
-
-
-wxString* wxPyInputStream::readline (int size) {
- // check if we have a real wxInputStream to work with
- if (!wxi) {
- PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream below");
- return NULL;
- }
-
- // init buffer
- int i;
- char ch;
- wxString* s = new wxString;
- if (!s) {
- PyErr_NoMemory();
- return NULL;
- }
-
- // read until \n or byte limit reached
- for (i=ch=0; (ch != '\n') && (!wxi->Eof()) && ((size < 0) || (i < size)); i++) {
- *s += ch = wxi->GetC();
- }
-
- // errorcheck
- if (wxi->LastError() == wxSTREAM_READ_ERROR) {
- delete s;
- PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
- return NULL;
- }
- return s;
-}
-
-
-wxStringPtrList* wxPyInputStream::readlines (int sizehint) {
- // check if we have a real wxInputStream to work with
- if (!wxi) {
- PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream below");
- return NULL;
- }
-
- // init list
- wxStringPtrList* l = new wxStringPtrList();
- if (!l) {
- PyErr_NoMemory();
- return NULL;
- }
-
- // read sizehint bytes or until EOF
- int i;
- for (i=0; (!wxi->Eof()) && ((sizehint < 0) || (i < sizehint));) {
- wxString* s = readline();
- if (s == NULL) {
- l->DeleteContents(TRUE);
- l->Clear();
- return NULL;
- }
- l->Append(s);
- i = i + s->Length();
- }
-
- // error check
- if (wxi->LastError() == wxSTREAM_READ_ERROR) {
- l->DeleteContents(TRUE);
- l->Clear();
- PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
- return NULL;
- }
- return l;
-}
-
-
-void wxPyInputStream::seek(int offset, int whence) {
- if (wxi)
- wxi->SeekI(offset, wxSeekMode(whence));
-}
-
-int wxPyInputStream::tell(){
- if (wxi)
- return wxi->TellI();
-}
-
-
-
-// wxInputStream which operates on a Python file-like object
-class wxPyCBInputStream : public wxInputStream {
-protected:
- PyObject* read;
- PyObject* seek;
- PyObject* tell;
- PyObject* py;
-
- virtual size_t OnSysRead(void *buffer, size_t bufsize) {
- if (bufsize == 0)
- return 0;
-
- wxPyBeginBlockThreads();
- PyObject* arglist = Py_BuildValue("(i)", bufsize);
- PyObject* result = PyEval_CallObject(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;
- strncpy((char*)buffer, PyString_AsString(result), o);
- Py_DECREF(result);
-
- }
- else
- m_lasterror = wxSTREAM_READ_ERROR;
- wxPyEndBlockThreads();
- m_lastcount = o;
- return o;
- }
-
- virtual size_t OnSysWrite(const void *buffer, size_t bufsize){
- m_lasterror = wxSTREAM_WRITE_ERROR;
- return 0;
- }
-
- virtual off_t OnSysSeek(off_t off, wxSeekMode mode){
- wxPyBeginBlockThreads();
- PyObject*arglist = Py_BuildValue("(ii)", off, mode);
- PyObject*result = PyEval_CallObject(seek, arglist);
- Py_DECREF(arglist);
- Py_XDECREF(result);
- wxPyEndBlockThreads();
- return OnSysTell();
- }
-
- virtual off_t OnSysTell() const{
- wxPyBeginBlockThreads();
- PyObject* arglist = Py_BuildValue("()");
- PyObject* result = PyEval_CallObject(tell, arglist);
- Py_DECREF(arglist);
- off_t o = 0;
- if (result != NULL) {
- o = PyInt_AsLong(result);
- Py_DECREF(result);
- };
- wxPyEndBlockThreads();
- return o;
- }
-
- wxPyCBInputStream(PyObject *p, PyObject *r, PyObject *s, PyObject *t)
- : py(p), read(r), seek(s), tell(t)
- {}
-
-public:
- ~wxPyCBInputStream() {
- wxPyBeginBlockThreads();
- Py_XDECREF(py);
- Py_XDECREF(read);
- Py_XDECREF(seek);
- Py_XDECREF(tell);
- wxPyEndBlockThreads();
- }
-
- virtual size_t GetSize() {
- if (seek && tell) {
- off_t temp = OnSysTell();
- off_t ret = OnSysSeek(0, wxFromEnd);
- OnSysSeek(temp, wxFromStart);
- return ret;
- }
- else
- return 0;
- }
-
- static wxPyCBInputStream* create(PyObject *py) {
- PyObject* read;
- PyObject* seek;
- PyObject* tell;
-
- if (!PyInstance_Check(py) && !PyFile_Check(py)) {
- PyErr_SetString(PyExc_TypeError, "Not a file-like object");
- Py_XDECREF(py);
- return NULL;
- }
- read = getMethod(py, "read");
- seek = getMethod(py, "seek");
- tell = getMethod(py, "tell");
-
- if (!read) {
- PyErr_SetString(PyExc_TypeError, "Not a file-like object");
- Py_XDECREF(py);
- Py_XDECREF(read);
- Py_XDECREF(seek);
- Py_XDECREF(tell);
- return NULL;
- }
- return new wxPyCBInputStream(py, read, seek, tell);
- }
-
- static PyObject* 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;
- }
-
-protected:
-
-};
-
projects / wxWidgets.git / blobdiff