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use core::ops::Deref;
use xmltree::Element;
use crate::types::Parse;
use crate::elementext::ElementExt;
use crate::encode::Encode;
use crate::error::*;
use crate::svd::{dimelement::DimElement, fieldinfo::FieldInfo};
#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
#[derive(Clone, Debug, PartialEq)]
pub enum Field {
Single(FieldInfo),
Array(FieldInfo, DimElement),
}
impl Deref for Field {
type Target = FieldInfo;
fn deref(&self) -> &FieldInfo {
match self {
Field::Single(info) => info,
Field::Array(info, _) => info,
}
}
}
impl Parse for Field {
type Object = Self;
type Error = anyhow::Error;
fn parse(tree: &Element) -> Result<Self> {
assert_eq!(tree.name, "field");
let info = FieldInfo::parse(tree)?;
if tree.get_child("dimIncrement").is_some() {
let array_info = DimElement::parse(tree)?;
check_has_placeholder(&info.name, "field")?;
if let Some(indices) = &array_info.dim_index {
assert_eq!(array_info.dim as usize, indices.len())
}
Ok(Field::Array(info, array_info))
} else {
Ok(Field::Single(info))
}
}
}
impl Encode for Field {
type Error = anyhow::Error;
fn encode(&self) -> Result<Element> {
match self {
Field::Single(info) => info.encode(),
Field::Array(info, array_info) => {
let mut base = info.encode()?;
base.merge(&array_info.encode()?);
Ok(base)
}
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::bitrange::{BitRange, BitRangeType};
use crate::dimelement::DimElementBuilder;
use crate::fieldinfo::FieldInfoBuilder;
use crate::run_test;
#[test]
fn decode_encode() {
let tests = vec![(
Field::Array(
FieldInfoBuilder::default()
.name("MODE%s".to_string())
.derived_from(Some("other_field".to_string()))
.bit_range(BitRange {
offset: 24,
width: 2,
range_type: BitRangeType::OffsetWidth,
})
.build()
.unwrap(),
DimElementBuilder::default()
.dim(2)
.dim_increment(4)
.dim_index(Some(vec!["10".to_string(), "20".to_string()]))
.build()
.unwrap(),
),
"
<field derivedFrom=\"other_field\">
<name>MODE%s</name>
<bitOffset>24</bitOffset>
<bitWidth>2</bitWidth>
<dim>2</dim>
<dimIncrement>4</dimIncrement>
<dimIndex>10,20</dimIndex>
</field>
",
)];
run_test::<Field>(&tests[..]);
}
}