26   contents = open(filename, 'rb').read()
51     assert contents[0:8] == b'MSFT\x02\x00\x01\x00'
52     ntypes, = struct.unpack_from('<I', contents, 0x20)
54         '<II', contents, 0x54 + 4*ntypes + 11*16)
57     assert contents[custom_off:custom_off + 6] == b'\x08\x00\x3e\x00\x00\x00'
61         contents[custom_off + 6:custom_off + 6 + 0x3e])
63     assert contents[custom_off+6+0x3e:custom_off+6+0x3e+8] == \
66     assert contents[custom_off + 6 + 0x3e + 8:custom_off + 6 + 0x3e + 8 +
70     contents = (
71         contents[0:custom_off + 6] +
75         contents[custom_off + 0x54:])
77     contents = re.sub(
81         br'/* at a redacted point in time', contents)
82     contents = re.sub(
86         contents)
90     contents = contents.replace(b'#endif !_MIDL_USE_GUIDDEF_',
95     contents = contents.replace(b'0x801026c, /* MIDL Version 8.1.620 */',
97   open(filename, 'wb').write(contents)
102   contents = open(tlb_file, 'rb').read()
103   assert contents[0:8] == b'MSFT\x02\x00\x01\x00'
104   ntypes, = struct.unpack_from('<I', contents, 0x20)
105   type_off, type_len = struct.unpack_from('<II', contents, 0x54 + 4*ntypes)
108       '<II', contents, 0x54 + 4*ntypes + 5*16)
111   contents = array.array('B', contents)
113   return contents, ntypes, type_off, guid_off, guid_len
116 def recreate_guid_hashtable(contents, ntypes, guid_off, guid_len):  argument
124         '<16sII', contents, guidind)
129     struct.pack_into('<I', contents, guidind + 0x14, nextguid)
132       '<II', contents, 0x54 + 4*ntypes + 4*16)
134     struct.pack_into('<I', contents, hash_off + 4*i, hashval)
138   contents = open(h_file, 'rb').read()
140     contents = re.sub(key, dynamic_guids[key], contents, flags=re.I)
141   open(h_file, 'wb').write(contents)
159   contents = open(iid_file, 'rb').read()
161     contents = re.sub(get_uuid_format_iid_file(key),
163                       contents,
165   open(iid_file, 'wb').write(contents)
175   contents = open(proxy_file, 'rb').read()
177     contents = re.sub(get_uuid_format_proxy_file(key),
179                       contents,
181   open(proxy_file, 'wb').write(contents)
184 def getguid(contents, offset):  argument
186   g0, g1, g2, g3 = struct.unpack_from('<IHH8s', contents, offset)
191 def setguid(contents, offset, guid):  argument
193   struct.pack_into('<IHH8s', contents, offset,
198   contents, ntypes, type_off, guid_off, guid_len = get_tlb_contents(tlb_file)
201     current_guid = getguid(contents, guid_off + i)
204         setguid(contents, guid_off + i, dynamic_guids[key])
206   recreate_guid_hashtable(contents, ntypes, guid_off, guid_len)
207   open(tlb_file, 'wb').write(contents)
243   contents = open(idl_template, 'rb').read()
244   contents = re.sub(b'PLACEHOLDER-GUID-', b'', contents, flags=re.I)
247       contents = re.sub(key, dynamic_guids[key], contents, flags=re.I)
248   open(idl, 'wb').write(contents)