BOOL PyObject_AsPROPVARIANTs(PyObject *ob, PROPVARIANT **ppRet, ULONG *pcRet)
{
BOOL ret=FALSE;
DWORD len, i;
PyObject *tuple=PyWinSequence_Tuple(ob, &len);
if (tuple==NULL)
return FALSE;
PROPVARIANT *pRet = new PROPVARIANT[len];
if (pRet==NULL){
PyErr_NoMemory();
goto cleanup;
}
for (i=0;i<len;i++)
PropVariantInit(pRet+i);
for (i=0;i<len;i++) {
PyObject *sub = PyTuple_GET_ITEM(tuple, i);
if (!PyObject_AsPROPVARIANT(sub, pRet+i))
goto cleanup;
}
ret=TRUE;
cleanup:
if (ret){
*ppRet = pRet;
*pcRet = len;
}
else if (pRet)
PyObject_FreePROPVARIANTs(pRet, len);
Py_DECREF(tuple);
return ret;
}
// @object PROPSPEC|Identifies a property. Can be either an int property id, or a str/unicode property name.
BOOL PyWinObject_AsPROPSPECs( PyObject *ob, PROPSPEC **ppRet, ULONG *pcRet)
{
TmpPyObject tuple=PyWinSequence_Tuple(ob, pcRet);
if (tuple==NULL)
return FALSE;
size_t numBytes = sizeof(PROPSPEC) * *pcRet;
*ppRet = (PROPSPEC *)malloc(numBytes);
if (*ppRet==NULL) {
PyErr_NoMemory();
return FALSE;
}
ZeroMemory(*ppRet, numBytes);
for (DWORD i=0; i<*pcRet; i++) {
PyObject *sub = PyTuple_GET_ITEM((PyObject *)tuple, i);
(*ppRet)[i].propid = PyInt_AsUnsignedLongMask(sub);
if ((*ppRet)[i].propid != (ULONG)-1 || !PyErr_Occurred())
(*ppRet)[i].ulKind = PRSPEC_PROPID;
else{
PyErr_Clear();
(*ppRet)[i].lpwstr = NULL;
if (PyWinObject_AsWCHAR(sub, &(*ppRet)[i].lpwstr))
(*ppRet)[i].ulKind = PRSPEC_LPWSTR;
else{
PyErr_Clear();
PyErr_SetString(PyExc_TypeError, "PROPSPECs must be a sequence of strings or integers");
PyObject_FreePROPSPECs(*ppRet, *pcRet);
*ppRet=NULL;
return FALSE;
}
}
}
return TRUE;
}
BOOL PyWinObject_AsCharArray(PyObject *str_seq, char ***pchars, DWORD *str_cnt, BOOL bNoneOK)
{
BOOL ret=FALSE;
PyObject *str_tuple=NULL, *tuple_item;
DWORD bufsize, tuple_index;
*pchars=NULL;
*str_cnt=0;
if (bNoneOK && str_seq==Py_None)
return TRUE;
if ((str_tuple=PyWinSequence_Tuple(str_seq, str_cnt))==NULL)
return FALSE;
bufsize=*str_cnt * sizeof(char *);
*pchars=(char **)malloc(bufsize);
if (*pchars==NULL){
PyErr_Format(PyExc_MemoryError, "Unable to allocate %d bytes", bufsize);
goto done;
}
ZeroMemory(*pchars, bufsize);
for (tuple_index=0;tuple_index<*str_cnt;tuple_index++){
tuple_item=PyTuple_GET_ITEM(str_tuple, tuple_index);
if (!PyWinObject_AsString(tuple_item, &((*pchars)[tuple_index]), FALSE)){
PyWinObject_FreeCharArray(*pchars, *str_cnt);
*pchars=NULL;
*str_cnt=0;
goto done;
}
}
ret=TRUE;
done:
Py_DECREF(str_tuple);
return ret;
}
// @object PROPSPEC|Identifies a property. Can be either an int property id, or a str/unicode property name.
BOOL PyObject_AsPROPSPECs( PyObject *ob, PROPSPEC **ppRet, ULONG *pcRet)
{
BOOL ret=FALSE;
DWORD len, i;
PyObject *tuple=PyWinSequence_Tuple(ob, &len);
if (tuple==NULL)
return FALSE;
// First count the items, and the total string space we need.
size_t cChars = 0;
for (i=0;i<len;i++) {
PyObject *sub = PyTuple_GET_ITEM(tuple, i);
if (PyUnicode_Check(sub))
cChars += PyUnicode_GET_SIZE(sub) + 1;
else if (PyString_Check(sub))
cChars += PyString_Size(sub) + 1;
else if (PyInt_Check(sub))
; // PROPID is a ULONG, so this may fail for values that require a python long
else {
PyErr_SetString(PyExc_TypeError, "PROPSPECs must be a sequence of strings or integers");
goto cleanup;
}
}
size_t numBytes;
numBytes = (sizeof(PROPSPEC) * len) + (sizeof(WCHAR) * cChars);
PROPSPEC *pRet;
pRet = (PROPSPEC *)malloc(numBytes);
if (pRet==NULL) {
PyErr_SetString(PyExc_MemoryError, "allocating PROPSPECs");
goto cleanup;
}
WCHAR *curBuf;
curBuf = (WCHAR *)(pRet+len);
for (i=0;i<len;i++) {
PyObject *sub = PyTuple_GET_ITEM(tuple, i);
BSTR bstr;
if (PyWinObject_AsBstr(sub, &bstr)) {
pRet[i].ulKind = PRSPEC_LPWSTR;
pRet[i].lpwstr = curBuf;
wcscpy( curBuf, bstr);
curBuf += wcslen(curBuf) + 1;
PyWinObject_FreeBstr(bstr);
} else {
PyErr_Clear();
pRet[i].ulKind = PRSPEC_PROPID;
pRet[i].propid = PyInt_AsLong(sub);
}
}
ret=TRUE;
*ppRet = pRet;
*pcRet = len;
cleanup:
Py_DECREF(tuple);
return ret;
}
// Same conversion as PyObject_AsPROPVARIANTs, but PROPVARIANT array is allocated by caller
BOOL PyObject_AsPreallocatedPROPVARIANTs(PyObject *ob, PROPVARIANT *propvars, ULONG cpropvars)
{
DWORD len, i;
TmpPyObject tuple=PyWinSequence_Tuple(ob, &len);
if (tuple==NULL)
return FALSE;
if (len != cpropvars){
PyErr_SetString(PyExc_ValueError, "Sequence not of required length");
return FALSE;
}
for (i=0; i<cpropvars; i++) {
PyObject *sub = PyTuple_GET_ITEM((PyObject *)tuple, i);
if (!PyObject_AsPROPVARIANT(sub, &propvars[i]))
for (; i--;)
PropVariantClear(&propvars[i]);
return FALSE;
}
return TRUE;
}
// Alocates and populates an array of DWORDS from a sequence of Python ints
BOOL PyWinObject_AsDWORDArray(PyObject *obdwords, DWORD **pdwords, DWORD *item_cnt, BOOL bNoneOk)
{
BOOL ret=TRUE;
DWORD bufsize, tuple_index;
PyObject *dwords_tuple=NULL, *tuple_item;
*pdwords=NULL;
*item_cnt=0;
if (obdwords==Py_None){
if (bNoneOk)
return TRUE;
PyErr_SetString(PyExc_ValueError,"Sequence of dwords cannot be None");
return FALSE;
}
if ((dwords_tuple=PyWinSequence_Tuple(obdwords, item_cnt))==NULL)
return FALSE; // last exit without cleaning up
bufsize=*item_cnt * sizeof(DWORD);
*pdwords=(DWORD *)malloc(bufsize);
if (*pdwords==NULL){
PyErr_Format(PyExc_MemoryError, "Unable to allocate %d bytes", bufsize);
ret=FALSE;
}
else
for (tuple_index=0; tuple_index<*item_cnt; tuple_index++){
tuple_item=PyTuple_GET_ITEM(dwords_tuple,tuple_index);
// Doesn't check for overflow, but will accept a python long
// greater than INT_MAX (even on python 2.3). Also accepts
// negatives and converts to the correct hex representation
(*pdwords)[tuple_index]=PyInt_AsUnsignedLongMask(tuple_item);
if (((*pdwords)[tuple_index]==-1) && PyErr_Occurred()){
ret=FALSE;
break;
}
}
if (!ret)
if (*pdwords!=NULL){
free(*pdwords);
*pdwords=NULL;
*item_cnt=0;
}
Py_XDECREF(dwords_tuple);
return ret;
}
// Converts a sequence of strings into a caller-allocated array of WCHAR pointers,
// each of which is allocated using CoTaskMemAlloc
BOOL PyWinObject_AsTaskAllocatedWCHARArray(PyObject *str_seq, LPWSTR *wchars, ULONG str_cnt)
{
TmpPyObject str_tuple;
ULONG seq_size, tuple_index;
ZeroMemory(wchars, str_cnt * sizeof(WCHAR *));
if ((str_tuple=PyWinSequence_Tuple(str_seq, &seq_size))==NULL)
return FALSE;
if (seq_size != str_cnt){
PyErr_SetString(PyExc_ValueError, "Sequence not of required length");
return FALSE;
}
for (tuple_index=0; tuple_index<str_cnt; tuple_index++){
PyObject *tuple_item=PyTuple_GET_ITEM((PyObject *)str_tuple, tuple_index);
if (!PyWinObject_AsTaskAllocatedWCHAR(tuple_item, &wchars[tuple_index], FALSE)){
for (tuple_index=0; tuple_index<str_cnt; tuple_index++)
if (wchars[tuple_index])
CoTaskMemFree(wchars[tuple_index]);
return FALSE;
}
}
return TRUE;
}
