decmathlib-rs 0.4.0

Port of the Intel Decimal Floating-Point Math Library decimal128 type to Rust.
Documentation 
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/* -------------------------------------------------------------------------------------------------- */
/* Port of the Intel Decimal Floating-Point Math Library decimal128 type to Rust.                     */
/* decmathlib-rs - Copyright (C) 2023-2024 Carlos Guzmán Álvarez                                      */
/* -------------------------------------------------------------------------------------------------- */
/* Licensed under the MIT license. See LICENSE file in the project root for full license information. */
/* -------------------------------------------------------------------------------------------------- */

use std::fmt::Formatter;
use std::str::FromStr;
use crate::d128::d128;

impl serde::ser::Serialize for d128 {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::ser::Serializer {
        serializer.serialize_str(&self.to_string())
    }
}

impl<'de> serde::de::Deserialize<'de> for d128 {
    fn deserialize<D>(deserializer: D) -> Result<d128, D::Error> where D: serde::de::Deserializer<'de> {
        deserializer.deserialize_str(Decimal128Visitor)
    }
}

struct Decimal128Visitor;

impl<'de> serde::de::Visitor<'de> for Decimal128Visitor {
    type Value = d128;

    fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
        write!(formatter, "a d128 value")
    }

    fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
        where E: serde::de::Error
    {
        d128::from_str(s).map_err(|_| E::invalid_value(serde::de::Unexpected::Str(s), &self))
    }
}