| #![cfg_attr(docsrs, doc(cfg(feature = "borsh")))] |
| |
| use alloc::vec::Vec; |
| use core::hash::BuildHasher; |
| use core::hash::Hash; |
| use core::iter::ExactSizeIterator; |
| use core::mem::size_of; |
| |
| use borsh::error::ERROR_ZST_FORBIDDEN; |
| use borsh::io::{Error, ErrorKind, Read, Result, Write}; |
| use borsh::{BorshDeserialize, BorshSerialize}; |
| |
| use crate::map::IndexMap; |
| use crate::set::IndexSet; |
| |
| impl<K, V, S> BorshSerialize for IndexMap<K, V, S> |
| where |
| K: BorshSerialize, |
| V: BorshSerialize, |
| { |
| #[inline] |
| fn serialize<W: Write>(&self, writer: &mut W) -> Result<()> { |
| check_zst::<K>()?; |
| |
| let iterator = self.iter(); |
| |
| u32::try_from(iterator.len()) |
| .map_err(|_| ErrorKind::InvalidData)? |
| .serialize(writer)?; |
| |
| for (key, value) in iterator { |
| key.serialize(writer)?; |
| value.serialize(writer)?; |
| } |
| |
| Ok(()) |
| } |
| } |
| |
| impl<K, V, S> BorshDeserialize for IndexMap<K, V, S> |
| where |
| K: BorshDeserialize + Eq + Hash, |
| V: BorshDeserialize, |
| S: BuildHasher + Default, |
| { |
| #[inline] |
| fn deserialize_reader<R: Read>(reader: &mut R) -> Result<Self> { |
| check_zst::<K>()?; |
| let vec = <Vec<(K, V)>>::deserialize_reader(reader)?; |
| Ok(vec.into_iter().collect::<IndexMap<K, V, S>>()) |
| } |
| } |
| |
| impl<T, S> BorshSerialize for IndexSet<T, S> |
| where |
| T: BorshSerialize, |
| { |
| #[inline] |
| fn serialize<W: Write>(&self, writer: &mut W) -> Result<()> { |
| check_zst::<T>()?; |
| |
| let iterator = self.iter(); |
| |
| u32::try_from(iterator.len()) |
| .map_err(|_| ErrorKind::InvalidData)? |
| .serialize(writer)?; |
| |
| for item in iterator { |
| item.serialize(writer)?; |
| } |
| |
| Ok(()) |
| } |
| } |
| |
| impl<T, S> BorshDeserialize for IndexSet<T, S> |
| where |
| T: BorshDeserialize + Eq + Hash, |
| S: BuildHasher + Default, |
| { |
| #[inline] |
| fn deserialize_reader<R: Read>(reader: &mut R) -> Result<Self> { |
| check_zst::<T>()?; |
| let vec = <Vec<T>>::deserialize_reader(reader)?; |
| Ok(vec.into_iter().collect::<IndexSet<T, S>>()) |
| } |
| } |
| |
| fn check_zst<T>() -> Result<()> { |
| if size_of::<T>() == 0 { |
| return Err(Error::new(ErrorKind::InvalidData, ERROR_ZST_FORBIDDEN)); |
| } |
| Ok(()) |
| } |
| |
| #[cfg(test)] |
| mod borsh_tests { |
| use super::*; |
| |
| #[test] |
| fn map_borsh_roundtrip() { |
| let original_map: IndexMap<i32, i32> = { |
| let mut map = IndexMap::new(); |
| map.insert(1, 2); |
| map.insert(3, 4); |
| map.insert(5, 6); |
| map |
| }; |
| let serialized_map = borsh::to_vec(&original_map).unwrap(); |
| let deserialized_map: IndexMap<i32, i32> = |
| BorshDeserialize::try_from_slice(&serialized_map).unwrap(); |
| assert_eq!(original_map, deserialized_map); |
| } |
| |
| #[test] |
| fn set_borsh_roundtrip() { |
| let original_map: IndexSet<i32> = [1, 2, 3, 4, 5, 6].into_iter().collect(); |
| let serialized_map = borsh::to_vec(&original_map).unwrap(); |
| let deserialized_map: IndexSet<i32> = |
| BorshDeserialize::try_from_slice(&serialized_map).unwrap(); |
| assert_eq!(original_map, deserialized_map); |
| } |
| } |