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eth2.0-specs
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bits serialization clear now, directly to bytes

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protolambda 2019-07-12 22:20:07 +02:00
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specs/simple-serialize.md
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@ -120,8 +120,10 @@ return b""
### `Bitvector[N]`
```python
as_integer = sum([value[i] << i for i in range(len(value))])
return as_integer.to_bytes((N + 7) // 8, "little")
array = [0] * ((N + 7) // 8)
for i in range(N):
array[i // 8] |= value[i] << (i % 8)
return bytes(array)
```
### `Bitlist[N]`
@ -129,8 +131,11 @@ return as_integer.to_bytes((N + 7) // 8, "little")
Note that from the offset coding, the length (in bytes) of the bitlist is known. An additional leading `1` bit is added so that the length in bits will also be known.
```python
as_integer = (1 << len(value)) + sum([value[i] << i for i in range(len(value))])
return as_integer.to_bytes((as_integer.bit_length() + 7) // 8, "little")
array = [0] * ((len(value) // 8) + 1)
for i in range(len(value)):
array[i // 8] |= value[i] << (i % 8)
array[len(value) // 8] |= 1 << (len(value) % 8)
return bytes(array)
```
### Vectors, containers, lists, unions