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m1n1.fw.common: Implement OSSerialize build

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Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2022-08-31 02:11:41 +09:00
parent 041e07b56b
commit 2c528baf2d
1 changed files with 41 additions and 1 deletions
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42
proxyclient/m1n1/fw/common.py
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@ -119,8 +119,48 @@ class OSSerialize(Construct):
#print(f"{' '*level} => {d}")
return d, last
def build_obj(self, obj, stream, last=True, level=0):
tag = 0
if last:
tag |= 0x80000000
if isinstance(obj, dict):
tag |= (1 << 24) | len(obj)
Int32ul.build_stream(tag, stream)
for i, (k, v) in enumerate(obj.items()):
self.build_obj(k, stream, False, level + 1)
self.build_obj(v, stream, i == len(obj) - 1, level + 1)
elif isinstance(obj, list):
tag |= (2 << 24) | len(obj)
Int32ul.build_stream(tag, stream)
for i, v in enumerate(obj):
self.build_obj(v, stream, i == len(obj) - 1, level + 1)
elif isinstance(obj, int):
tag |= (4 << 24) | 64
Int32ul.build_stream(tag, stream)
Int64ul.build_stream(obj, stream)
elif isinstance(obj, str):
obj = obj.encode("utf-8")
tag |= (9 << 24) | len(obj)
Int32ul.build_stream(tag, stream)
stream.write(obj)
elif isinstance(obj, bytes):
tag |= (10 << 24) | len(obj)
Int32ul.build_stream(tag, stream)
stream.write(obj)
elif isinstance(obj, bool):
tag |= (11 << 24) | int(obj)
Int32ul.build_stream(tag, stream)
else:
raise Exception(f"Cannot encode {obj!r}")
pos = stream.tell()
if pos & 3:
stream.write(bytes(4 - (pos & 3)))
def _build(self, obj, stream, context, path):
assert False
Int32ul.build_stream(0xd3, stream)
self.build_obj(obj, stream)
def _sizeof(self, context, path):
return None