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Implement SerializableState for unsigned types and arrays
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,345 @@ | ||
| use crate::array::{ | ||
| self, | ||
| typenum::{Prod, Unsigned, U1, U16, U2, U4, U8}, | ||
| ArraySize, ByteArray, | ||
| }; | ||
| use core::{convert::TryInto, default::Default, fmt}; | ||
|
|
||
| /// Serialized internal state. | ||
| pub type SerializedState<T> = ByteArray<<T as SerializableState>::SerializedStateSize>; | ||
|
|
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| /// The error type returned when an object cannot be deserialized from the state. | ||
| #[derive(Copy, Clone, Eq, PartialEq, Debug)] | ||
| pub struct DeserializeStateError; | ||
|
|
||
| impl fmt::Display for DeserializeStateError { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> { | ||
| f.write_str("Deserialization error") | ||
| } | ||
| } | ||
|
|
||
| #[cfg(feature = "std")] | ||
| impl std::error::Error for DeserializeStateError {} | ||
|
|
||
| /// Types which can serialize the internal state and be restored from it. | ||
| /// | ||
| /// # SECURITY WARNING | ||
| /// | ||
| /// Serialized state may contain sensitive data. | ||
| pub trait SerializableState | ||
| where | ||
| Self: Sized, | ||
| { | ||
| /// Size of serialized internal state. | ||
| type SerializedStateSize: ArraySize; | ||
|
|
||
| /// Serialize and return internal state. | ||
| fn serialize(&self) -> SerializedState<Self>; | ||
| /// Create an object from serialized internal state. | ||
| fn deserialize(serialized_state: &SerializedState<Self>) | ||
| -> Result<Self, DeserializeStateError>; | ||
| } | ||
|
|
||
| macro_rules! impl_seializable_state_unsigned { | ||
| ($type: ty, $type_size: ty) => { | ||
| impl SerializableState for $type { | ||
| type SerializedStateSize = $type_size; | ||
|
|
||
| fn serialize(&self) -> SerializedState<Self> { | ||
| self.to_le_bytes().into() | ||
| } | ||
|
|
||
| fn deserialize( | ||
| serialized_state: &SerializedState<Self>, | ||
| ) -> Result<Self, DeserializeStateError> { | ||
| Ok(<$type>::from_le_bytes((*serialized_state).into())) | ||
| } | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| impl_seializable_state_unsigned!(u8, U1); | ||
| impl_seializable_state_unsigned!(u16, U2); | ||
| impl_seializable_state_unsigned!(u32, U4); | ||
| impl_seializable_state_unsigned!(u64, U8); | ||
| impl_seializable_state_unsigned!(u128, U16); | ||
|
|
||
| macro_rules! impl_serializable_state_u8_array { | ||
| ($($n: ty),*) => { | ||
| $( | ||
| impl SerializableState for [u8; <$n>::USIZE] { | ||
| type SerializedStateSize = $n; | ||
|
|
||
| fn serialize(&self) -> SerializedState<Self> { | ||
| (*self).into() | ||
| } | ||
|
|
||
| fn deserialize( | ||
| serialized_state: &SerializedState<Self>, | ||
| ) -> Result<Self, DeserializeStateError> { | ||
| Ok((*serialized_state).into()) | ||
| } | ||
| } | ||
| )* | ||
| }; | ||
| } | ||
|
|
||
| macro_rules! impl_serializable_state_type_array { | ||
| ($type: ty, $type_size: ty, $n: ty) => { | ||
| impl SerializableState for [$type; <$n>::USIZE] { | ||
| type SerializedStateSize = Prod<$n, $type_size>; | ||
|
|
||
| fn serialize(&self) -> SerializedState<Self> { | ||
| let mut serialized_state = SerializedState::<Self>::default(); | ||
| for (val, chunk) in self | ||
| .iter() | ||
| .zip(serialized_state.chunks_exact_mut(<$type_size>::USIZE)) | ||
| { | ||
| chunk.copy_from_slice(&val.to_le_bytes()); | ||
| } | ||
|
|
||
| serialized_state | ||
| } | ||
|
|
||
| fn deserialize( | ||
| serialized_state: &SerializedState<Self>, | ||
| ) -> Result<Self, DeserializeStateError> { | ||
| let mut array = [0; <$n>::USIZE]; | ||
| for (val, chunk) in array | ||
| .iter_mut() | ||
| .zip(serialized_state.chunks_exact(<$type_size>::USIZE)) | ||
| { | ||
| *val = <$type>::from_le_bytes(chunk.try_into().unwrap()); | ||
| } | ||
| Ok(array) | ||
| } | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| macro_rules! impl_serializable_state_u16_array { | ||
| ($($n: ty),*) => { | ||
| $( | ||
| impl_serializable_state_type_array!(u16, U2, $n); | ||
| )* | ||
| }; | ||
| } | ||
|
|
||
| macro_rules! impl_serializable_state_u32_array { | ||
| ($($n: ty),*) => { | ||
| $( | ||
| impl_serializable_state_type_array!(u32, U4, $n); | ||
| )* | ||
| }; | ||
| } | ||
|
|
||
| macro_rules! impl_serializable_state_u64_array { | ||
| ($($n: ty),*) => { | ||
| $( | ||
| impl_serializable_state_type_array!(u64, U8, $n); | ||
| )* | ||
| }; | ||
| } | ||
|
|
||
| macro_rules! impl_serializable_state_u128_array { | ||
| ($($n: ty),*) => { | ||
| $( | ||
| impl_serializable_state_type_array!(u128, U8, $n); | ||
| )* | ||
| }; | ||
| } | ||
|
|
||
| impl_serializable_state_u8_array! { | ||
| array::typenum::U1, | ||
| array::typenum::U2, | ||
| array::typenum::U3, | ||
| array::typenum::U4, | ||
| array::typenum::U5, | ||
| array::typenum::U6, | ||
| array::typenum::U7, | ||
| array::typenum::U8, | ||
| array::typenum::U9, | ||
| array::typenum::U10, | ||
| array::typenum::U11, | ||
| array::typenum::U12, | ||
| array::typenum::U13, | ||
| array::typenum::U14, | ||
| array::typenum::U15, | ||
| array::typenum::U16, | ||
| array::typenum::U17, | ||
| array::typenum::U18, | ||
| array::typenum::U19, | ||
| array::typenum::U20, | ||
| array::typenum::U21, | ||
| array::typenum::U22, | ||
| array::typenum::U23, | ||
| array::typenum::U24, | ||
| array::typenum::U25, | ||
| array::typenum::U26, | ||
| array::typenum::U27, | ||
| array::typenum::U28, | ||
| array::typenum::U29, | ||
| array::typenum::U30, | ||
| array::typenum::U31, | ||
| array::typenum::U32, | ||
| array::typenum::U33, | ||
| array::typenum::U34, | ||
| array::typenum::U35, | ||
| array::typenum::U36, | ||
| array::typenum::U37, | ||
| array::typenum::U38, | ||
| array::typenum::U39, | ||
| array::typenum::U40, | ||
| array::typenum::U41, | ||
| array::typenum::U42, | ||
| array::typenum::U43, | ||
| array::typenum::U44, | ||
| array::typenum::U45, | ||
| array::typenum::U46, | ||
| array::typenum::U47, | ||
| array::typenum::U48, | ||
| array::typenum::U49, | ||
| array::typenum::U50, | ||
| array::typenum::U51, | ||
| array::typenum::U52, | ||
| array::typenum::U53, | ||
| array::typenum::U54, | ||
| array::typenum::U55, | ||
| array::typenum::U56, | ||
| array::typenum::U57, | ||
| array::typenum::U58, | ||
| array::typenum::U59, | ||
| array::typenum::U60, | ||
| array::typenum::U61, | ||
| array::typenum::U62, | ||
| array::typenum::U63, | ||
| array::typenum::U64, | ||
| array::typenum::U96, | ||
| array::typenum::U128, | ||
| array::typenum::U192, | ||
| array::typenum::U256, | ||
| array::typenum::U384, | ||
| array::typenum::U448, | ||
| array::typenum::U512, | ||
| array::typenum::U768, | ||
| array::typenum::U896, | ||
| array::typenum::U1024, | ||
| array::typenum::U2048, | ||
| array::typenum::U4096, | ||
| array::typenum::U8192 | ||
| } | ||
|
|
||
| impl_serializable_state_u16_array! { | ||
| array::typenum::U1, | ||
| array::typenum::U2, | ||
| array::typenum::U3, | ||
| array::typenum::U4, | ||
| array::typenum::U5, | ||
| array::typenum::U6, | ||
| array::typenum::U7, | ||
| array::typenum::U8, | ||
| array::typenum::U9, | ||
| array::typenum::U10, | ||
| array::typenum::U11, | ||
| array::typenum::U12, | ||
| array::typenum::U13, | ||
| array::typenum::U14, | ||
| array::typenum::U15, | ||
| array::typenum::U16, | ||
| array::typenum::U17, | ||
| array::typenum::U18, | ||
| array::typenum::U19, | ||
| array::typenum::U20, | ||
| array::typenum::U21, | ||
| array::typenum::U22, | ||
| array::typenum::U23, | ||
| array::typenum::U24, | ||
| array::typenum::U25, | ||
| array::typenum::U26, | ||
| array::typenum::U27, | ||
| array::typenum::U28, | ||
| array::typenum::U29, | ||
| array::typenum::U30, | ||
| array::typenum::U31, | ||
| array::typenum::U32, | ||
| array::typenum::U48, | ||
| array::typenum::U96, | ||
| array::typenum::U128, | ||
| array::typenum::U192, | ||
| array::typenum::U256, | ||
| array::typenum::U384, | ||
| array::typenum::U448, | ||
| array::typenum::U512, | ||
| array::typenum::U2048, | ||
| array::typenum::U4096 | ||
| } | ||
|
|
||
| impl_serializable_state_u32_array! { | ||
| array::typenum::U1, | ||
| array::typenum::U2, | ||
| array::typenum::U3, | ||
| array::typenum::U4, | ||
| array::typenum::U5, | ||
| array::typenum::U6, | ||
| array::typenum::U7, | ||
| array::typenum::U8, | ||
| array::typenum::U9, | ||
| array::typenum::U10, | ||
| array::typenum::U11, | ||
| array::typenum::U12, | ||
| array::typenum::U13, | ||
| array::typenum::U14, | ||
| array::typenum::U15, | ||
| array::typenum::U16, | ||
| array::typenum::U24, | ||
| array::typenum::U32, | ||
| array::typenum::U48, | ||
| array::typenum::U64, | ||
| array::typenum::U96, | ||
| array::typenum::U128, | ||
| array::typenum::U192, | ||
| array::typenum::U256, | ||
| array::typenum::U512, | ||
| array::typenum::U1024, | ||
| array::typenum::U2048 | ||
| } | ||
|
|
||
| impl_serializable_state_u64_array! { | ||
| array::typenum::U1, | ||
| array::typenum::U2, | ||
| array::typenum::U3, | ||
| array::typenum::U4, | ||
| array::typenum::U5, | ||
| array::typenum::U6, | ||
| array::typenum::U7, | ||
| array::typenum::U8, | ||
| array::typenum::U12, | ||
| array::typenum::U16, | ||
| array::typenum::U24, | ||
| array::typenum::U32, | ||
| array::typenum::U48, | ||
| array::typenum::U64, | ||
| array::typenum::U96, | ||
| array::typenum::U128, | ||
| array::typenum::U256, | ||
| array::typenum::U512, | ||
| array::typenum::U1024 | ||
| } | ||
|
|
||
| impl_serializable_state_u128_array! { | ||
| array::typenum::U1, | ||
| array::typenum::U2, | ||
| array::typenum::U3, | ||
| array::typenum::U4, | ||
| array::typenum::U6, | ||
| array::typenum::U8, | ||
| array::typenum::U12, | ||
| array::typenum::U16, | ||
| array::typenum::U24, | ||
| array::typenum::U32, | ||
| array::typenum::U48, | ||
| array::typenum::U64, | ||
| array::typenum::U128, | ||
| array::typenum::U256, | ||
| array::typenum::U512 | ||
| } |