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use crate::{
calc_result::CalcResult,
cast::NumberOrArray,
expressions::{
parser::{ArrayNode, Node},
token::Error,
types::CellReferenceIndex,
},
model::Model,
};
/// Unify how we map booleans/strings to f64
fn to_f64(value: &ArrayNode) -> Result<f64, Error> {
match value {
ArrayNode::Number(f) => Ok(*f),
ArrayNode::Boolean(b) => Ok(if *b { 1.0 } else { 0.0 }),
ArrayNode::String(s) => match s.parse::<f64>() {
Ok(f) => Ok(f),
Err(_) => Err(Error::VALUE),
},
ArrayNode::Error(err) => Err(err.clone()),
}
}
impl<'a> Model<'a> {
/// Applies `op` elementâwise for arrays/numbers.
pub(crate) fn handle_arithmetic(
&mut self,
left: &Node,
right: &Node,
cell: CellReferenceIndex,
op: &dyn Fn(f64, f64) -> Result<f64, Error>,
) -> CalcResult {
let l = match self.get_number_or_array(left, cell) {
Ok(f) => f,
Err(s) => {
return s;
}
};
let r = match self.get_number_or_array(right, cell) {
Ok(f) => f,
Err(s) => {
return s;
}
};
match (l, r) {
// -----------------------------------------------------
// Case 1: Both are numbers
// -----------------------------------------------------
(NumberOrArray::Number(f1), NumberOrArray::Number(f2)) => match op(f1, f2) {
Ok(x) => CalcResult::Number(x),
Err(Error::DIV) => CalcResult::Error {
error: Error::DIV,
origin: cell,
message: "Divide by 0".to_string(),
},
Err(Error::VALUE) => CalcResult::Error {
error: Error::VALUE,
origin: cell,
message: "Invalid number".to_string(),
},
Err(e) => CalcResult::Error {
error: e,
origin: cell,
message: "Unknown error".to_string(),
},
},
// -----------------------------------------------------
// Case 2: left is Number, right is Array
// -----------------------------------------------------
(NumberOrArray::Number(f1), NumberOrArray::Array(a2)) => {
let mut array = Vec::new();
for row in a2 {
let mut data_row = Vec::new();
for node in row {
match to_f64(&node) {
Ok(f2) => match op(f1, f2) {
Ok(x) => data_row.push(ArrayNode::Number(x)),
Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
Err(Error::VALUE) => data_row.push(ArrayNode::Error(Error::VALUE)),
Err(e) => data_row.push(ArrayNode::Error(e)),
},
Err(err) => data_row.push(ArrayNode::Error(err)),
}
}
array.push(data_row);
}
CalcResult::Array(array)
}
// -----------------------------------------------------
// Case 3: left is Array, right is Number
// -----------------------------------------------------
(NumberOrArray::Array(a1), NumberOrArray::Number(f2)) => {
let mut array = Vec::new();
for row in a1 {
let mut data_row = Vec::new();
for node in row {
match to_f64(&node) {
Ok(f1) => match op(f1, f2) {
Ok(x) => data_row.push(ArrayNode::Number(x)),
Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
Err(Error::VALUE) => data_row.push(ArrayNode::Error(Error::VALUE)),
Err(e) => data_row.push(ArrayNode::Error(e)),
},
Err(err) => data_row.push(ArrayNode::Error(err)),
}
}
array.push(data_row);
}
CalcResult::Array(array)
}
// -----------------------------------------------------
// Case 4: Both are arrays
// -----------------------------------------------------
(NumberOrArray::Array(a1), NumberOrArray::Array(a2)) => {
let n1 = a1.len();
let m1 = a1.first().map(|r| r.len()).unwrap_or(0);
let n2 = a2.len();
let m2 = a2.first().map(|r| r.len()).unwrap_or(0);
let n = n1.max(n2);
let m = m1.max(m2);
let mut array = Vec::new();
for i in 0..n {
let row1 = a1.get(i);
let row2 = a2.get(i);
let mut data_row = Vec::new();
for j in 0..m {
let val1 = row1.and_then(|r| r.get(j));
let val2 = row2.and_then(|r| r.get(j));
match (val1, val2) {
(Some(v1), Some(v2)) => match (to_f64(v1), to_f64(v2)) {
(Ok(f1), Ok(f2)) => match op(f1, f2) {
Ok(x) => data_row.push(ArrayNode::Number(x)),
Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
Err(Error::VALUE) => {
data_row.push(ArrayNode::Error(Error::VALUE))
}
Err(e) => data_row.push(ArrayNode::Error(e)),
},
(Err(e), _) | (_, Err(e)) => data_row.push(ArrayNode::Error(e)),
},
// Mismatched dimensions => #VALUE!
_ => data_row.push(ArrayNode::Error(Error::VALUE)),
}
}
array.push(data_row);
}
CalcResult::Array(array)
}
}
}
}