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use crate::{
types::extra::{LeEqU128, LeEqU16, LeEqU32, LeEqU64, LeEqU8},
FixedI128, FixedI16, FixedI32, FixedI64, FixedI8, FixedU128, FixedU16, FixedU32, FixedU64,
FixedU8, Wrapping,
};
use core::fmt::{Formatter, Result as FmtResult};
use serde::{
de::{self, Deserialize, Deserializer, MapAccess, SeqAccess, Visitor},
ser::{Serialize, SerializeStruct, Serializer},
};
macro_rules! serde_fixed {
($Fixed:ident($LeEqU:ident) is $TBits:ident name $Name:expr) => {
impl<Frac: $LeEqU> Serialize for $Fixed<Frac> {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
let bits = self.to_bits();
let mut state = serializer.serialize_struct($Name, 1)?;
state.serialize_field("bits", &bits)?;
state.end()
}
}
impl<Frac: $LeEqU> Serialize for Wrapping<$Fixed<Frac>> {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
self.0.serialize(serializer)
}
}
impl<'de, Frac: $LeEqU> Deserialize<'de> for $Fixed<Frac> {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
struct FixedVisitor;
impl<'de> Visitor<'de> for FixedVisitor {
type Value = $TBits;
fn expecting(&self, formatter: &mut Formatter) -> FmtResult {
formatter.write_str("struct ")?;
formatter.write_str($Name)
}
fn visit_seq<V: SeqAccess<'de>>(self, mut seq: V) -> Result<$TBits, V::Error> {
let bits = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(0, &self))?;
Ok(bits)
}
fn visit_map<V: MapAccess<'de>>(self, mut map: V) -> Result<$TBits, V::Error> {
let mut bits = None;
while let Some(key) = map.next_key()? {
match key {
Field::Bits => {
if bits.is_some() {
return Err(de::Error::duplicate_field("bits"));
}
bits = Some(map.next_value()?);
}
}
}
let bits = bits.ok_or_else(|| de::Error::missing_field("bits"))?;
Ok(bits)
}
}
let bits = deserializer.deserialize_struct($Name, FIELDS, FixedVisitor)?;
Ok($Fixed::from_bits(bits))
}
}
impl<'de, Frac: $LeEqU> Deserialize<'de> for Wrapping<$Fixed<Frac>> {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
$Fixed::deserialize(deserializer).map(Wrapping)
}
}
};
}
serde_fixed! { FixedI8(LeEqU8) is i8 name "FixedI8" }
serde_fixed! { FixedI16(LeEqU16) is i16 name "FixedI16" }
serde_fixed! { FixedI32(LeEqU32) is i32 name "FixedI32" }
serde_fixed! { FixedI64(LeEqU64) is i64 name "FixedI64" }
serde_fixed! { FixedI128(LeEqU128) is i128 name "FixedI128" }
serde_fixed! { FixedU8(LeEqU8) is u8 name "FixedU8" }
serde_fixed! { FixedU16(LeEqU16) is u16 name "FixedU16" }
serde_fixed! { FixedU32(LeEqU32) is u32 name "FixedU32" }
serde_fixed! { FixedU64(LeEqU64) is u64 name "FixedU64" }
serde_fixed! { FixedU128(LeEqU128) is u128 name "FixedU128" }
const FIELDS: &[&str] = &["bits"];
enum Field {
Bits,
}
impl<'de> Deserialize<'de> for Field {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Field, D::Error> {
struct FieldVisitor;
impl<'de> Visitor<'de> for FieldVisitor {
type Value = Field;
fn expecting(&self, formatter: &mut Formatter) -> FmtResult {
formatter.write_str("`bits`")
}
fn visit_str<E: de::Error>(self, value: &str) -> Result<Field, E> {
match value {
"bits" => Ok(Field::Bits),
_ => Err(de::Error::unknown_field(value, FIELDS)),
}
}
}
deserializer.deserialize_identifier(FieldVisitor)
}
}