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229 lines (200 loc) · 8.87 KB
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import dummy_wintypes
import itertools
from winstruct import WinStruct, WinUnion, WinStructType, Ptr, WinEnum, BitFieldValue, ComplexArrayExpression
from simpleparser import *
class WinStructParser(Parser):
def __init__(self, *args, **kwargs):
super(WinStructParser, self).__init__(*args, **kwargs)
self.pack = None
def parse_array_or_bitfield(self):
if type(self.peek()) == OpenSquareBracketToken:
# Array
self.assert_token_type(OpenSquareBracketToken)
nb_rep = ComplexArrayExpression()
while type(self.peek()) != CloseSquareBracketToken:
tok = self.next_token()
if type(tok) not in (NameToken, PlusToken, StarToken):
raise ValueError("Array expression only accept names/+/*")
is_name = (type(tok) == NameToken)
nb_rep.add_token_to_expression(tok.value, is_name)
self.assert_token_type(CloseSquareBracketToken)
return nb_rep # YOLO, import
# Bitfield
self.assert_token_type(ColonToken)
nb_bits = self.promote_to_int(self.next_token())
return BitFieldValue(nb_bits)
def parse_def(self):
if type(self.peek()) != NameToken and self.peek() in (KeywordToken("union"), KeywordToken("struct")):
# Anonymous union-structure :)
# kword = self.assert_token_type(KeywordToken)
# Not a name. Anon union/struct ?
subdef_type = self.next_token() # union / struct
if type(self.peek()) == OpenBracketToken:
sub = self.parse_winstruct(anonymous=True, anon_type=subdef_type)
return (sub, NameToken(None), 1)
else:
# struct _MYNAME_ -> no anon juste the name of the struct.
# Nothing special: juste drop the struct
assert subdef_type.value == "struct"
# Name will be enforced by nest line.
def_type_tok = self.assert_token_type(NameToken)
def_type = WinStructType(def_type_tok.value)
if type(self.peek()) == StarToken:
def_type = Ptr(def_type)
discard_star = self.next_token()
def_name = self.assert_token_type(NameToken)
if type(self.peek()) == SemiColonToken:
self.next_token()
return (def_type, def_name, 1)
number_rep = self.parse_array_or_bitfield()
self.assert_token_type(SemiColonToken)
return (def_type, def_name, number_rep)
def parse_typedef(self, struct):
if type(self.peek()) == SemiColonToken: # Just a ; no typedef
self.next_token()
return
sep = CommaToken()
while type(sep) == CommaToken:
add_to_typedef = struct.add_typedef
if type(self.peek()) == StarToken:
self.next_token()
add_to_typedef = struct.add_ptr_typedef
name = self.assert_token_type(NameToken)
# UGLY HACK for LDR definition
if name.value == "RESTRICTED_POINTER":
name = self.assert_token_type(NameToken)
add_to_typedef(name.value)
sep = self.next_token()
self.assert_token_type(SemiColonToken, sep)
def parse_enum(self, is_typedef):
"""Handle enum typedef with no value assignement and 1 typedef after"""
if not type(self.peek()) == OpenBracketToken:
# Not an ANON enum
enum_name = self.assert_token_type(NameToken).value
res_enum = WinEnum(enum_name)
else:
if not is_typedef:
raise ValueError("Anonymous union not in a typedef")
enum_name = "<anonymous>"
res_enum = WinEnum(None)
self.assert_token_type(OpenBracketToken)
count = itertools.count()
while type(self.peek()) != CloseBracketToken:
i = next(count)
name = self.assert_token_type(NameToken)
if type(self.peek()) == EqualToken:
# Equal sign (hard define of enum value)
self.assert_token_type(EqualToken)
i = self.promote_to_int(self.next_token())
# print(i, new_i)
# assert new_i >= i, "Cannot define eum value with inferior current value ({0})".format(enum_name)
# Setup new counter from here
count = itertools.count(i + 1)
res_enum.add_enum_entry(i, name.value)
if not type(self.peek()) == CloseBracketToken:
self.assert_token_type(CommaToken)
self.assert_token_type(CloseBracketToken)
self.parse_typedef(res_enum)
#other_name = self.assert_token_type(NameToken).value
#res_enum.add_typedef(other_name)
#self.assert_token_type(SemiColonToken)
return res_enum
def parse_winstruct(self, anonymous=False, anon_type=None):
is_typedef = False
peeked = self.peek()
if peeked == KeywordToken("typedef"):
self.assert_keyword("typedef")
is_typedef = True
if not anonymous:
def_type = self.assert_token_type(KeywordToken)
else:
def_type = anon_type # Hack car le lexeing a ete fait avant, l'info est donc passee en param.
if def_type.value == "enum":
return self.parse_enum(is_typedef)
if def_type.value == "struct":
WinDefType = WinStruct
elif def_type.value == "union":
WinDefType = WinUnion
else:
raise ParsingError("Expecting union or struct got <{0}> instead".format(def_type.value))
if not type(self.peek()) == OpenBracketToken:
# Not an anonymous structure def
struct_name = self.assert_token_type(NameToken).value
else:
# Anonymous structure def: check if we are ina typedef
if not is_typedef and not anonymous:
raise ValueError("Anonymous structure/union not in a typedef")
struct_name = None
self.assert_token_type(OpenBracketToken)
result = WinDefType(struct_name, self.pack)
while type(self.peek()) != CloseBracketToken:
tok_type, tok_name, nb_rep = self.parse_def()
result.add_field((tok_type, tok_name.value, nb_rep))
self.assert_token_type(CloseBracketToken)
if is_typedef:
self.parse_typedef(result)
elif anonymous:
if type(self.peek()) == NameToken:
result.add_typedef(self.assert_token_type(NameToken).value)
self.assert_token_type(SemiColonToken)
else:
self.assert_token_type(SemiColonToken)
return result
def parse(self):
strucs = []
enums = []
while self.peek() is not None:
# HANDLE PRAGMA_PACK / PRAGMA_NOPACK
if type(self.peek()) == NameToken:
pragma = self.next_token().value
if pragma == "PRAGMA_NOPACK":
self.pack = None
continue
if pragma != "PRAGMA_PACK":
raise ValueError("Expected struct/union def or PRAGMA_[NO]PACK")
pack_value = self.promote_to_int(self.next_token())
self.pack = pack_value
x = self.parse_winstruct()
#x.packing = self.pack
#if x.packing != None:
# print("{0} pack = {1}".format(x.name, x.packing))
if type(x) == WinStruct or type(x) == WinUnion:
strucs.append(x)
elif type(x) == WinEnum:
enums.append(x)
else:
raise ValueError("Unknow returned type {0}".format(x))
return strucs, enums
class SimpleTypeDefine(object):
def __init__(self, lvalue, rvalue):
self.lvalue = lvalue
self.rvalue = rvalue
def generate_ctypes(self):
return "{self.lvalue} = {self.rvalue}".format(self=self)
class SimpleTypesParser(Parser):
def __init__(self, data):
self.lexer = iter(Lexer(self.initial_processing(data), newlinetoken=True))
self.peek_token = None
def parse(self):
results = []
while self.peek() is not None:
lvalue = self.assert_token_type(NameToken).value
self.assert_token_type(EqualToken)
rvalue = ""
while type(self.peek()) is not NewLineToken:
rvalue += self.next_token().value
results.append(SimpleTypeDefine(lvalue, rvalue))
while type(self.peek()) is NewLineToken: # discard the NewLineToken(s)
self.next_token()
return results
def dbg_lexer(data):
for i in Lexer(data).token_generation():
print i
def dbg_parser(data):
return WinStructParser(data).parse()
def dbg_validate(data):
return validate_structs(Parser(data).parse())
if __name__ == "__main__":
import sys
#data = open(sys.argv[1], 'r').read()
#ctypes_code = generate_ctypes(data)