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advapi32: Simplify and clean up RegDeleteTree implementation. 

Signed-off-by: Sebastian Lackner <sebastian@fds-team.de>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Sebastian Lackner 2016-02-26 17:02:25 +01:00 committed by Alexandre Julliard
parent 6b7c576bc5
commit 3f5457accf
1 changed files with 51 additions and 52 deletions
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103
dlls/advapi32/registry.c
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@ -3016,91 +3016,90 @@ LSTATUS WINAPI RegDisablePredefinedCache(void)
return ERROR_SUCCESS;
}
/******************************************************************************
* RegDeleteTreeW [ADVAPI32.@]
*
*/
LSTATUS WINAPI RegDeleteTreeW(HKEY hKey, LPCWSTR lpszSubKey)
LSTATUS WINAPI RegDeleteTreeW( HKEY hkey, const WCHAR *subkey )
{
static const WCHAR emptyW[] = {0};
DWORD name_size, max_name, max_subkey;
WCHAR *name_buf = NULL;
LONG ret;
DWORD dwMaxSubkeyLen, dwMaxValueLen;
DWORD dwMaxLen, dwSize;
WCHAR szNameBuf[MAX_PATH], *lpszName = szNameBuf;
HKEY hSubKey = hKey;
TRACE("(hkey=%p,%p %s)\n", hKey, lpszSubKey, debugstr_w(lpszSubKey));
TRACE( "(%p, %s)\n", hkey, debugstr_w(subkey) );
if(lpszSubKey)
if (subkey)
{
ret = RegOpenKeyExW(hKey, lpszSubKey, 0, KEY_READ, &hSubKey);
ret = RegOpenKeyExW( hkey, subkey, 0, KEY_READ, &hkey );
if (ret) return ret;
}
/* Get highest length for keys, values */
ret = RegQueryInfoKeyW(hSubKey, NULL, NULL, NULL, NULL,
&dwMaxSubkeyLen, NULL, NULL, &dwMaxValueLen, NULL, NULL, NULL);
if (ret) goto cleanup;
ret = RegQueryInfoKeyW( hkey, NULL, NULL, NULL, NULL, &max_subkey,
NULL, NULL, &max_name, NULL, NULL, NULL );
if (ret)
goto cleanup;
dwMaxSubkeyLen++;
dwMaxValueLen++;
dwMaxLen = max(dwMaxSubkeyLen, dwMaxValueLen);
if (dwMaxLen > sizeof(szNameBuf)/sizeof(WCHAR))
max_name = max( max_subkey, max_name ) + 1;
if (!(name_buf = heap_alloc( max_name * sizeof(WCHAR) )))
{
/* Name too big: alloc a buffer for it */
if (!(lpszName = heap_alloc( dwMaxLen*sizeof(WCHAR))))
{
ret = ERROR_NOT_ENOUGH_MEMORY;
goto cleanup;
}
ret = ERROR_NOT_ENOUGH_MEMORY;
goto cleanup;
}
/* Recursively delete all the subkeys */
while (TRUE)
/* Recursively delete subkeys */
for (;;)
{
dwSize = dwMaxLen;
if (RegEnumKeyExW(hSubKey, 0, lpszName, &dwSize, NULL,
NULL, NULL, NULL)) break;
ret = RegDeleteTreeW(hSubKey, lpszName);
name_size = max_name;
ret = RegEnumKeyExW( hkey, 0, name_buf, &name_size, NULL, NULL, NULL, NULL );
if (ret == ERROR_NO_MORE_ITEMS) break;
if (ret) goto cleanup;
ret = RegDeleteTreeW( hkey, name_buf );
if (ret) goto cleanup;
}
if (lpszSubKey)
ret = RegDeleteKeyW(hKey, lpszSubKey);
else
while (TRUE)
{
dwSize = dwMaxLen;
if (RegEnumValueW(hKey, 0, lpszName, &dwSize,
NULL, NULL, NULL, NULL)) break;
/* Delete the key itself */
if (subkey)
{
ret = RegDeleteKeyW( hkey, emptyW );
goto cleanup;
}
ret = RegDeleteValueW(hKey, lpszName);
if (ret) goto cleanup;
}
/* Delete values */
for (;;)
{
name_size = max_name;
ret = RegEnumValueW( hkey, 0, name_buf, &name_size, NULL, NULL, NULL, NULL );
if (ret == ERROR_NO_MORE_ITEMS) break;
if (ret) goto cleanup;
ret = RegDeleteValueW( hkey, name_buf );
if (ret) goto cleanup;
}
ret = ERROR_SUCCESS;
cleanup:
/* Free buffer if allocated */
if (lpszName != szNameBuf)
heap_free( lpszName);
if(lpszSubKey)
RegCloseKey(hSubKey);
heap_free( name_buf );
if (subkey)
RegCloseKey( hkey );
return ret;
}
/******************************************************************************
* RegDeleteTreeA [ADVAPI32.@]
*
*/
LSTATUS WINAPI RegDeleteTreeA(HKEY hKey, LPCSTR lpszSubKey)
LSTATUS WINAPI RegDeleteTreeA( HKEY hkey, const char *subkey )
{
UNICODE_STRING subkeyW;
LONG ret;
UNICODE_STRING lpszSubKeyW;
if (lpszSubKey) RtlCreateUnicodeStringFromAsciiz( &lpszSubKeyW, lpszSubKey);
else lpszSubKeyW.Buffer = NULL;
ret = RegDeleteTreeW( hKey, lpszSubKeyW.Buffer);
RtlFreeUnicodeString( &lpszSubKeyW );
if (subkey) RtlCreateUnicodeStringFromAsciiz( &subkeyW, subkey );
else subkeyW.Buffer = NULL;
ret = RegDeleteTreeW( hkey, subkeyW.Buffer );
RtlFreeUnicodeString( &subkeyW );
return ret;
}