Rustify snapshot module #4691
Rustify snapshot module #4691
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| pub data: Data, | ||
| } | ||
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| impl<Data: for<'a> Deserialize<'a>> Snapshot<Data> { |
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| impl<Data: for<'a> Deserialize<'a>> Snapshot<Data> { | |
| impl<Data: DeserializeOwned> Snapshot<Data> { |
| // The snapshot version we can handle | ||
| version: Version, | ||
| } | ||
| pub fn load<R: Read>(reader: &mut R) -> Result<Self, SnapshotError> { |
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This function should also do the check the the header's magic value is correct
| pub data: Data, | ||
| } | ||
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| impl<Data: for<'a> Deserialize<'a>> Snapshot<Data> { | ||
| /// Helper function to deserialize an object from a reader | ||
| pub fn deserialize<T, O>(reader: &mut T) -> Result<O, SnapshotError> |
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This function should probably be free-standing, and not pub. Then you can reuse it inside SnapshotHdr::load as well
| } | ||
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| /// Load a snapshot from a reader and validate its CRC | ||
| pub fn load<T, O>(reader: &mut T, snapshot_len: usize) -> Result<(O, Version), SnapshotError> | ||
| pub fn load<R: Read>(reader: &mut R, snapshot_len: usize) -> Result<Self, SnapshotError> |
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This function's implementation we can change to only do a single pass over the snapshot bytes, as well as not taking a snapshot_len: usize parameter, I think:
- Construct
crc_readerfrom the given reader, as is done now - Deserialize the
Snapshot<Data>object from this reader. Since thestruct Snapshotdoes not contain thecrc, andallow_trailing_bytesis set forbincode, this will simply leave the crc bytes unread. - at the end, store the crc from the
CrcReaderin some local variable. - Read the remaining 4 bytes in the input stream, and check that they match the computed CRC.
| ) -> Result<O, SnapshotError> | ||
| impl<Data: Serialize + Debug> Snapshot<Data> { | ||
| /// Helper function to serialize an object to a writer | ||
| pub fn serialize<T, O>(writer: &mut T, data: &O) -> Result<usize, SnapshotError> |
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just like deserialize, this can be a free standing function, non-pub, and be reused in SnapshotHdr
| .map_err(|err| SnapshotError::Serde(err.to_string()))?; | ||
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| Ok(buffer.len()) | ||
| // bincode::serialize_into(writer, data).map_err(|err| SnapshotError::Serde(err.to_string())) |
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Why use a temporary buffer instead of just this commented out line? :o
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Messaging to let you know I'm still working on this |
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