27 lines
830 B
Rust
27 lines
830 B
Rust
use num_bigint::BigInt;
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use num_traits::cast::FromPrimitive;
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use num_traits::cast::ToPrimitive;
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/// Enable big int serialization by providing a `serialize` function
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pub fn serialize<S>(big_int: &BigInt, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: serde::Serializer,
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{
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serde::Serialize::serialize(
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&big_int
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.to_i64()
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.ok_or_else(|| serde::ser::Error::custom("expected a i64-sized bignum"))?,
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serializer,
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)
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}
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/// Enable big int deserialization by providing a `deserialize` function
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pub fn deserialize<'de, D>(deserializer: D) -> Result<BigInt, D::Error>
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where
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D: serde::Deserializer<'de>,
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{
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let x: i64 = serde::Deserialize::deserialize(deserializer)?;
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Ok(BigInt::from_i64(x)
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.ok_or_else(|| serde::de::Error::custom("expected a i64-sized bignum"))?)
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}
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