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gh-102344: implement winreg QueryValue / SetValue using QueryValueEx / SetValueEx #102345

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Merged
zooba merged 10 commits into from
Mar 1, 2023
Merged

gh-102344: implement winreg QueryValue / SetValue using QueryValueEx / SetValueEx #102345

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0d928df
reimplement QueryValue / SetValue
maxbachmann Feb 28, 2023
e0b256d
refactor QueryValueEx
maxbachmann Feb 28, 2023
799f380
cleanup
maxbachmann Feb 28, 2023
67ef9f3
fix type
maxbachmann Feb 28, 2023
fbc1a0e
remove unused variables
maxbachmann Feb 28, 2023
de0549b
fix duplicated variable name
maxbachmann Mar 1, 2023
deca441
add news
maxbachmann Mar 1, 2023
2c95f23
Update PC/winreg.c
maxbachmann Mar 1, 2023
8a4543b
revert part
maxbachmann Mar 1, 2023
8397a2f
move news
maxbachmann Mar 1, 2023
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reimplement QueryValue / SetValue
  • Loading branch information
@maxbachmann
maxbachmann authored Feb 28, 2023
commit 0d928df61a177021a3575932e6ed97831afcc0fe
146 changes: 100 additions & 46 deletions PC/winreg.c
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Original file line number Diff line number Diff line change
Expand Up @@ -561,7 +561,7 @@ Py2Reg(PyObject *value, DWORD typ, BYTE **retDataBuf, DWORD *retDataSize)
{
Py_ssize_t i,j;
switch (typ) {
case REG_DWORD:
case REG_DWORD:
{
if (value != Py_None && !PyLong_Check(value)) {
return FALSE;
Expand All @@ -585,7 +585,7 @@ Py2Reg(PyObject *value, DWORD typ, BYTE **retDataBuf, DWORD *retDataSize)
*retDataSize = sizeof(DWORD);
break;
}
case REG_QWORD:
case REG_QWORD:
{
if (value != Py_None && !PyLong_Check(value)) {
return FALSE;
Expand Down Expand Up @@ -1488,53 +1488,76 @@ static PyObject *
winreg_QueryValue_impl(PyObject *module, HKEY key, const Py_UNICODE *sub_key)
/*[clinic end generated code: output=c655810ae50c63a9 input=41cafbbf423b21d6]*/
{
long rc;
PyObject *retStr;
wchar_t *retBuf;
DWORD bufSize = 0;
DWORD retSize = 0;
wchar_t *tmp;
LONG rc;
HKEY childKey = key;
WCHAR buf[256], *pbuf = buf;
DWORD size = sizeof(buf);
DWORD type;
Py_ssize_t length;
PyObject *result = NULL;

if (PySys_Audit("winreg.QueryValue", "nuu",
(Py_ssize_t)key, sub_key, NULL) < 0) {
return NULL;
}
rc = RegQueryValueW(key, sub_key, NULL, &retSize);
if (rc == ERROR_MORE_DATA)
retSize = 256;
else if (rc != ERROR_SUCCESS)
return PyErr_SetFromWindowsErrWithFunction(rc,

if (key == HKEY_PERFORMANCE_DATA) {
return PyErr_SetFromWindowsErrWithFunction(ERROR_INVALID_HANDLE,
"RegQueryValue");
}

bufSize = retSize;
retBuf = (wchar_t *) PyMem_Malloc(bufSize);
if (retBuf == NULL)
return PyErr_NoMemory();
if (sub_key && sub_key[0]) {
Py_BEGIN_ALLOW_THREADS
rc = RegOpenKeyExW(key, sub_key, 0, KEY_QUERY_VALUE, &childKey);
Py_END_ALLOW_THREADS
if (rc != ERROR_SUCCESS) {
return PyErr_SetFromWindowsErrWithFunction(rc, "RegOpenKeyEx");
}
}

while (1) {
retSize = bufSize;
rc = RegQueryValueW(key, sub_key, retBuf, &retSize);
if (rc != ERROR_MORE_DATA)
Py_BEGIN_ALLOW_THREADS
rc = RegQueryValueExW(childKey, NULL, NULL, &type, (LPBYTE)pbuf,
&size);
Py_END_ALLOW_THREADS
if (rc != ERROR_MORE_DATA) {
break;

bufSize *= 2;
tmp = (wchar_t *) PyMem_Realloc(retBuf, bufSize);
}
void *tmp = PyMem_Realloc(pbuf != buf ? pbuf : NULL, size);
if (tmp == NULL) {
PyMem_Free(retBuf);
return PyErr_NoMemory();
PyErr_NoMemory();
goto exit;
}
retBuf = tmp;
pbuf = tmp;
}

if (rc != ERROR_SUCCESS) {
PyMem_Free(retBuf);
return PyErr_SetFromWindowsErrWithFunction(rc,
"RegQueryValue");
if (rc == ERROR_SUCCESS) {
if (type != REG_SZ) {
PyErr_SetFromWindowsErrWithFunction(ERROR_INVALID_DATA,
"RegQueryValue");
goto exit;
}
length = wcsnlen(pbuf, size / sizeof(WCHAR));
}
else if (rc == ERROR_FILE_NOT_FOUND) {
// Return an empty string if there's no default value.
length = 0;
}
else {
PyErr_SetFromWindowsErrWithFunction(rc, "RegQueryValueEx");
goto exit;
}

retStr = PyUnicode_FromWideChar(retBuf, wcslen(retBuf));
PyMem_Free(retBuf);
return retStr;
result = PyUnicode_FromWideChar(pbuf, length);

exit:
if (pbuf != buf) {
PyMem_Free(pbuf);
}
if (childKey != key) {
RegCloseKey(childKey);
}
return result;
}


Expand Down Expand Up @@ -1687,38 +1710,69 @@ winreg_SetValue_impl(PyObject *module, HKEY key, const Py_UNICODE *sub_key,
DWORD type, PyObject *value_obj)
/*[clinic end generated code: output=d4773dc9c372311a input=bf088494ae2d24fd]*/
{
Py_ssize_t value_length;
long rc;
LONG rc;
HKEY childKey = key;
LPWSTR value;
Py_ssize_t size;
Py_ssize_t length;
PyObject *result = NULL;

if (type != REG_SZ) {
PyErr_SetString(PyExc_TypeError, "type must be winreg.REG_SZ");
return NULL;
}

wchar_t *value = PyUnicode_AsWideCharString(value_obj, &value_length);
value = PyUnicode_AsWideCharString(value_obj, &length);
if (value == NULL) {
return NULL;
}
if ((Py_ssize_t)(DWORD)value_length != value_length) {

size = (length + 1) * sizeof(WCHAR);
if ((Py_ssize_t)(DWORD)size != size) {
PyErr_SetString(PyExc_OverflowError, "value is too long");
PyMem_Free(value);
return NULL;
goto exit;
}

if (PySys_Audit("winreg.SetValue", "nunu#",
(Py_ssize_t)key, sub_key, (Py_ssize_t)type,
value, value_length) < 0) {
PyMem_Free(value);
return NULL;
value, length) < 0)
{
goto exit;
}

if (key == HKEY_PERFORMANCE_DATA) {
PyErr_SetFromWindowsErrWithFunction(ERROR_INVALID_HANDLE,
"RegSetValue");
goto exit;
}

if (sub_key && sub_key[0]) {
Py_BEGIN_ALLOW_THREADS
rc = RegCreateKeyExW(key, sub_key, 0, NULL, 0, KEY_SET_VALUE, NULL,
&childKey, NULL);
Py_END_ALLOW_THREADS
if (rc != ERROR_SUCCESS) {
PyErr_SetFromWindowsErrWithFunction(rc, "RegCreateKeyEx");
goto exit;
}
}

Py_BEGIN_ALLOW_THREADS
rc = RegSetValueW(key, sub_key, REG_SZ, value, (DWORD)(value_length + 1));
rc = RegSetValueExW(childKey, NULL, 0, REG_SZ, (LPBYTE)value, (DWORD)size);
Py_END_ALLOW_THREADS
if (rc == ERROR_SUCCESS) {
result = Py_NewRef(Py_None);
}
else {
PyErr_SetFromWindowsErrWithFunction(rc, "RegSetValueEx");
}

exit:
PyMem_Free(value);
if (rc != ERROR_SUCCESS)
return PyErr_SetFromWindowsErrWithFunction(rc, "RegSetValue");
Py_RETURN_NONE;
if (childKey != key) {
RegCloseKey(childKey);
}
return result;
}

/*[clinic input]
Expand Down