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use super::{
sink_names_a_b, source_names_output, BinBuildEnvironment,
BinDescription, Calculator, FetchItem, GetCalibration, Item,
Iteration, Result, Scope, SinkBin, SinkNames, SourceBin, SourceId,
SourceNames, SourceSinkBinDescription, WriteDotSimple, SINK_A, SINK_B,
SOURCE_OUTPUT,
};
use crate::error;
use crate::item::TwoItemsExt;
use indexmap::IndexSet;
use std;
static BIN_TYPE: &str = "subtract";
#[derive(Debug)]
pub struct Bin {
scope: Scope,
source_a: Box<dyn FetchItem>,
source_b: Box<dyn FetchItem>,
result_output: Item,
}
impl SinkBin for Bin {}
impl SourceBin for Bin {
fn get_source_data(&self, source: &SourceId) -> Result<Item> {
if source.id == SOURCE_OUTPUT {
Ok(self.result_output.clone())
} else {
error::MissingSourceName {
scope: self.scope.clone(),
name: source.id.to_string(),
bin_type: BIN_TYPE.to_string(),
}
.fail()
}
}
}
impl Calculator for Bin {
fn calculate(&mut self, _iteration: &Iteration) -> Result<()> {
let a = self.source_a.fetch_item(&self.scope)?;
let b = self.source_b.fetch_item(&self.scope)?;
self.result_output = match (a, b).common_type() {
(Item::I8(a), Item::I8(b)) => logic(a, b),
(Item::I16(a), Item::I16(b)) => logic(a, b),
(Item::I32(a), Item::I32(b)) => logic(a, b),
(Item::I64(a), Item::I64(b)) => logic(a, b),
(Item::U8(a), Item::U8(b)) => logic(a, b),
(Item::U16(a), Item::U16(b)) => logic(a, b),
(Item::U32(a), Item::U32(b)) => logic(a, b),
(Item::U64(a), Item::U64(b)) => logic(a, b),
(Item::F32(a), Item::F32(b)) => logic(a, b),
(Item::F64(a), Item::F64(b)) => logic(a, b),
_ => Item::Nothing,
};
Ok(())
}
}
fn logic<T: std::ops::Sub + Into<Item>>(a: T, b: T) -> Item
where
T: std::ops::Sub,
Item: From<<T as std::ops::Sub>::Output>,
{
(a - b).into()
}
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct Description;
impl BinDescription for Description {
type Bin = Bin;
fn check_validity(
&self,
_scope: &Scope,
_get_calibration: &mut dyn GetCalibration,
) -> Result<()> {
Ok(())
}
fn bin_type(&self) -> &'static str {
BIN_TYPE
}
}
impl SinkNames for Description {
fn sink_names(&self) -> IndexSet<String> {
sink_names_a_b()
}
}
impl SourceNames for Description {
fn source_names(&self) -> Result<IndexSet<String>> {
Ok(source_names_output())
}
}
impl SourceSinkBinDescription for Description {
fn build_bin(
&self,
scope: &Scope,
env: &mut dyn BinBuildEnvironment,
) -> Result<Self::Bin> {
Ok(Bin {
scope: scope.clone(),
source_a: env.resolve(SINK_A)?,
source_b: env.resolve(SINK_B)?,
result_output: Item::Nothing,
})
}
}
impl WriteDotSimple for Description {}