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[models] Calculate group_num based on GUID

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derrod 2020-05-09 11:04:29 +02:00
parent 17ea65d2da
commit 8328a8ebaa
1 changed files with 21 additions and 9 deletions
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30
legendary/models/manifest.py
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@ -400,11 +400,12 @@ class ChunkInfo:
self.guid = None
self.hash = 0
self.sha_hash = b''
self.group_num = 0
self.window_size = 0
self.file_size = 0
self._manifest_version = manifest_version
# caches for things that are "expensive" to compute
self._group_num = None
self._guid_str = None
self._guid_num = None
@ -426,17 +427,28 @@ class ChunkInfo:
self._guid_num = self.guid[3] + (self.guid[2] << 32) + (self.guid[1] << 64) + (self.guid[0] << 96)
return self._guid_num
@property
def group_num(self):
if self._guid_num is not None:
return self._group_num
self._group_num = (zlib.crc32(
struct.pack('<I', self.guid[0]) +
struct.pack('<I', self.guid[1]) +
struct.pack('<I', self.guid[2]) +
struct.pack('<I', self.guid[3])
) & 0xffffffff) % 100
return self._group_num
@group_num.setter
def group_num(self, value):
self._group_num = value
@property
def path(self):
return '{}/{:02d}/{:016X}_{}.chunk'.format(
get_chunk_dir(self._manifest_version),
# the result of this seems to always match the group number, but this is the "correct way"
(zlib.crc32(struct.pack('<I', self.guid[0]) +
struct.pack('<I', self.guid[1]) +
struct.pack('<I', self.guid[2]) +
struct.pack('<I', self.guid[3])) & 0xffffffff) % 100,
self.hash, ''.join('{:08X}'.format(g) for g in self.guid)
)
get_chunk_dir(self._manifest_version), self.group_num,
self.hash, ''.join('{:08X}'.format(g) for g in self.guid))
class FML: