static PyObject *
io_open(PyObject *self, PyObject *args, PyObject *kwds)
{
char *kwlist[] = {"file", "mode", "buffering",
"encoding", "errors", "newline",
"closefd", NULL};
PyObject *file;
char *mode = "r";
int buffering = -1, closefd = 1;
char *encoding = NULL, *errors = NULL, *newline = NULL;
unsigned i;
int reading = 0, writing = 0, appending = 0, updating = 0;
int text = 0, binary = 0, universal = 0;
char rawmode[5], *m;
int line_buffering;
long isatty;
PyObject *raw, *modeobj = NULL, *buffer, *wrapper, *result = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|sizzzi:open", kwlist,
&file, &mode, &buffering,
&encoding, &errors, &newline,
&closefd)) {
return NULL;
}
if (!PyUnicode_Check(file) &&
!PyBytes_Check(file) &&
!PyNumber_Check(file)) {
PyObject *repr = PyObject_Repr(file);
if (repr != NULL) {
PyErr_Format(PyExc_TypeError, "invalid file: %s",
PyString_AS_STRING(repr));
Py_DECREF(repr);
}
return NULL;
}
/* Decode mode */
for (i = 0; i < strlen(mode); i++) {
char c = mode[i];
switch (c) {
case 'r':
reading = 1;
break;
case 'w':
writing = 1;
break;
case 'a':
appending = 1;
break;
case '+':
updating = 1;
break;
case 't':
text = 1;
break;
case 'b':
binary = 1;
break;
case 'U':
universal = 1;
reading = 1;
break;
default:
goto invalid_mode;
}
/* c must not be duplicated */
if (strchr(mode+i+1, c)) {
invalid_mode:
PyErr_Format(PyExc_ValueError, "invalid mode: '%s'", mode);
return NULL;
}
}
m = rawmode;
if (reading) *(m++) = 'r';
if (writing) *(m++) = 'w';
if (appending) *(m++) = 'a';
if (updating) *(m++) = '+';
*m = '\0';
/* Parameters validation */
if (universal) {
if (writing || appending) {
PyErr_SetString(PyExc_ValueError,
"can't use U and writing mode at once");
return NULL;
}
reading = 1;
}
if (text && binary) {
PyErr_SetString(PyExc_ValueError,
"can't have text and binary mode at once");
return NULL;
}
if (reading + writing + appending > 1) {
PyErr_SetString(PyExc_ValueError,
"must have exactly one of read/write/append mode");
return NULL;
}
if (binary && encoding != NULL) {
PyErr_SetString(PyExc_ValueError,
"binary mode doesn't take an encoding argument");
return NULL;
}
if (binary && errors != NULL) {
PyErr_SetString(PyExc_ValueError,
"binary mode doesn't take an errors argument");
return NULL;
}
if (binary && newline != NULL) {
PyErr_SetString(PyExc_ValueError,
"binary mode doesn't take a newline argument");
return NULL;
}
/* Create the Raw file stream */
raw = PyObject_CallFunction((PyObject *)&PyFileIO_Type,
"Osi", file, rawmode, closefd);
if (raw == NULL)
return NULL;
result = raw;
modeobj = PyUnicode_FromString(mode);
if (modeobj == NULL)
goto error;
/* buffering */
{
PyObject *res = PyObject_CallMethod(raw, "isatty", NULL);
if (res == NULL)
goto error;
isatty = PyLong_AsLong(res);
Py_DECREF(res);
if (isatty == -1 && PyErr_Occurred())
goto error;
}
if (buffering == 1 || (buffering < 0 && isatty)) {
buffering = -1;
line_buffering = 1;
}
else
line_buffering = 0;
if (buffering < 0) {
buffering = DEFAULT_BUFFER_SIZE;
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
{
struct stat st;
int fileno;
PyObject *res = PyObject_CallMethod(raw, "fileno", NULL);
if (res == NULL)
goto error;
fileno = _PyInt_AsInt(res);
Py_DECREF(res);
if (fileno == -1 && PyErr_Occurred())
goto error;
if (fstat(fileno, &st) >= 0 && st.st_blksize > 1)
buffering = st.st_blksize;
}
#endif
}
if (buffering < 0) {
PyErr_SetString(PyExc_ValueError,
"invalid buffering size");
goto error;
}
/* if not buffering, returns the raw file object */
if (buffering == 0) {
if (!binary) {
PyErr_SetString(PyExc_ValueError,
"can't have unbuffered text I/O");
goto error;
}
Py_DECREF(modeobj);
return result;
}
/* wraps into a buffered file */
{
PyObject *Buffered_class;
if (updating)
Buffered_class = (PyObject *)&PyBufferedRandom_Type;
else if (writing || appending)
Buffered_class = (PyObject *)&PyBufferedWriter_Type;
else if (reading)
Buffered_class = (PyObject *)&PyBufferedReader_Type;
else {
PyErr_Format(PyExc_ValueError,
"unknown mode: '%s'", mode);
goto error;
}
buffer = PyObject_CallFunction(Buffered_class, "Oi", raw, buffering);
}
if (buffer == NULL)
goto error;
result = buffer;
Py_DECREF(raw);
/* if binary, returns the buffered file */
if (binary) {
Py_DECREF(modeobj);
return result;
}
/* wraps into a TextIOWrapper */
wrapper = PyObject_CallFunction((PyObject *)&PyTextIOWrapper_Type,
"Osssi",
buffer,
encoding, errors, newline,
line_buffering);
if (wrapper == NULL)
goto error;
result = wrapper;
Py_DECREF(buffer);
if (PyObject_SetAttrString(wrapper, "mode", modeobj) < 0)
goto error;
Py_DECREF(modeobj);
return result;
error:
if (result != NULL) {
PyObject *exc, *val, *tb, *close_result;
PyErr_Fetch(&exc, &val, &tb);
close_result = PyObject_CallMethod(result, "close", NULL);
_PyErr_ReplaceException(exc, val, tb);
Py_XDECREF(close_result);
Py_DECREF(result);
}
Py_XDECREF(modeobj);
return NULL;
}
/* This function is called by the tp_dealloc handler to clear weak references.
*
* This iterates through the weak references for 'object' and calls callbacks
* for those references which have one. It returns when all callbacks have
* been attempted.
*/
void
PyObject_ClearWeakRefs(PyObject *object)
{
PyWeakReference **list;
if (object == NULL
|| !PyType_SUPPORTS_WEAKREFS(Py_TYPE(object))
|| object->ob_refcnt != 0) {
PyErr_BadInternalCall();
return;
}
list = GET_WEAKREFS_LISTPTR(object);
/* Remove the callback-less basic and proxy references */
if (*list != NULL && (*list)->wr_callback == NULL) {
clear_weakref(*list);
if (*list != NULL && (*list)->wr_callback == NULL)
clear_weakref(*list);
}
if (*list != NULL) {
PyWeakReference *current = *list;
Py_ssize_t count = _PyWeakref_GetWeakrefCount(current);
PyObject *err_type, *err_value, *err_tb;
PyErr_Fetch(&err_type, &err_value, &err_tb);
if (count == 1) {
PyObject *callback = current->wr_callback;
current->wr_callback = NULL;
clear_weakref(current);
if (callback != NULL) {
if (current->ob_refcnt > 0)
handle_callback(current, callback);
Py_DECREF(callback);
}
}
else {
PyObject *tuple;
Py_ssize_t i = 0;
tuple = PyTuple_New(count * 2);
if (tuple == NULL) {
_PyErr_ReplaceException(err_type, err_value, err_tb);
return;
}
for (i = 0; i < count; ++i) {
PyWeakReference *next = current->wr_next;
if (current->ob_refcnt > 0)
{
Py_INCREF(current);
PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current);
PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback);
}
else {
Py_DECREF(current->wr_callback);
}
current->wr_callback = NULL;
clear_weakref(current);
current = next;
}
for (i = 0; i < count; ++i) {
PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1);
/* The tuple may have slots left to NULL */
if (callback != NULL) {
PyObject *item = PyTuple_GET_ITEM(tuple, i * 2);
handle_callback((PyWeakReference *)item, callback);
}
}
Py_DECREF(tuple);
}
assert(!PyErr_Occurred());
PyErr_Restore(err_type, err_value, err_tb);
}
}
