Fixed ctypes_generation about some bugs on py3

ctypes_generation/definitions/functions/winfunc.txt

@@ -33,10 +33,14 @@ HANDLE WINAPI CreateFileW(
 
 
 
+/*
+Flags is directly dereferenced if non-null on windows 10
+Let's assert it's a PVOID for now on
 
+*/
 NTSTATUS WINAPI LdrLoadDll(
   __in_opt LPCWSTR               PathToFile,
-  __in_opt ULONG                Flags,
+  __in_opt PVOID                Flags,
   _In_ PUNICODE_STRING      ModuleFileName,
   _Out_ PHANDLE             ModuleHandle
 );

ctypes_generation/definitions/ntstatus_template.py

@@ -1,6 +1,9 @@
+import sys
 import ctypes
 from .flag import Flag
 
+is_py3 = (sys.version_info.major >= 3)
+
 class NtStatusException(WindowsError):
     ALL_STATUS = {}
     def __init__(self , code):
@@ -11,8 +14,12 @@ class NtStatusException(WindowsError):
         self.code = x[0]
         self.name = x[1]
         self.descr = x[2]
-        x =  ctypes.c_long(x[0]).value, x[1], x[2]
-        return super(NtStatusException, self).__init__(*x)
+        code_as_long = ctypes.c_long(x[0]).value
+        if is_py3:
+            vals =  code_as_long, x[1], x[2], code_as_long
+        else:
+            vals =  code_as_long, x[1], x[2]
+        return super(NtStatusException, self).__init__(*vals)
 
     def __str__(self):
         return "{e.name}(0x{e.code:x}): {e.descr}".format(e=self)

ctypes_generation/extended_structs/_LSA_UNICODE_STRING.py

@@ -20,6 +20,11 @@ class _LSA_UNICODE_STRING(INITIAL_LSA_UNICODE_STRING):
         utf16_len = len(s) * 2
         return cls(utf16_len, utf16_len, ctypes.cast(PWSTR(s), PVOID))
 
+    @classmethod
+    def from_size(cls, size):
+        buffer = ctypes.create_string_buffer(size)
+        return cls(size, size, ctypes.cast(buffer, PVOID))
+
     def __repr__(self):
         return """<{0} "{1}" at {2}>""".format(type(self).__name__, self.str, hex(id(self)))