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big to little endian, some more tests

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Darren Langley
2019-02-15 20:46:06 +10:00
parent 0800091a43
commit c59bab58d2
5 changed files with 141 additions and 59 deletions
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16
eth2/utils/ssz/README.md
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@@ -69,7 +69,7 @@ Syntax:
| Shorthand | Meaning |
|:-------------|:----------------------------------------------------|
| `big` | ``big endian`` |
| `little` | ``little endian`` |
| `to_bytes` | convert to bytes. Params: ``(size, byte order)`` |
| `from_bytes` | convert from bytes. Params: ``(bytes, byte order)`` |
| `value` | the value to serialize |
@@ -82,7 +82,7 @@ Syntax:
Convert directly to bytes the size of the int. (e.g. ``int16 = 2 bytes``)
All integers are serialized as **big endian**.
All integers are serialized as **little endian**.
| Check to perform | Code |
|:-----------------------|:------------------------|
@@ -92,7 +92,7 @@ All integers are serialized as **big endian**.
```python
buffer_size = int_size / 8
return value.to_bytes(buffer_size, 'big')
return value.to_bytes(buffer_size, 'little')
```
#### Address
@@ -131,7 +131,7 @@ For general `byte` type:
value_bytes ]``
```python
byte_length = (len(value)).to_bytes(4, 'big')
byte_length = (len(value)).to_bytes(4, 'little')
return byte_length + value
```
@@ -175,12 +175,12 @@ At each step, the following checks should be made:
Convert directly from bytes into integer utilising the number of bytes the same
size as the integer length. (e.g. ``int16 == 2 bytes``)
All integers are interpreted as **big endian**.
All integers are interpreted as **little endian**.
```python
byte_length = int_size / 8
new_index = current_index + int_size
return int.from_bytes(rawbytes[current_index:current_index+int_size], 'big'), new_index
return int.from_bytes(rawbytes[current_index:current_index+int_size], 'little'), new_index
```
#### Address
@@ -206,7 +206,7 @@ return rawbytes[current_index:current_index+32], new_index
Get the length of the bytes, return the bytes.
```python
bytes_length = int.from_bytes(rawbytes[current_index:current_index+4], 'big')
bytes_length = int.from_bytes(rawbytes[current_index:current_index+4], 'little')
new_index = current_index + 4 + bytes_lenth
return rawbytes[current_index+4:current_index+4+bytes_length], new_index
```
@@ -224,7 +224,7 @@ entire length of the list.
| rawbytes has enough left for length | ``len(rawbytes) > current_index + 4`` |
```python
total_length = int.from_bytes(rawbytes[current_index:current_index+4], 'big')
total_length = int.from_bytes(rawbytes[current_index:current_index+4], 'little')
new_index = current_index + 4 + total_length
item_index = current_index + 4
deserialized_list = []