fn resolve_decimal()

in avro/src/types.rs [766:810]
43 lines of code
5 McCabe index (conditional complexity)

    fn resolve_decimal(
        self,
        precision: Precision,
        scale: Scale,
        inner: &Schema,
    ) -> Result<Self, Error> {
        if scale > precision {
            return Err(Error::GetScaleAndPrecision { scale, precision });
        }
        match inner {
            &Schema::Fixed(FixedSchema { size, .. }) => {
                if max_prec_for_len(size)? < precision {
                    return Err(Error::GetScaleWithFixedSize { size, precision });
                }
            }
            Schema::Bytes => (),
            _ => return Err(Error::ResolveDecimalSchema(inner.into())),
        };
        match self {
            Value::Decimal(num) => {
                let num_bytes = num.len();
                if max_prec_for_len(num_bytes)? < precision {
                    Err(Error::ComparePrecisionAndSize {
                        precision,
                        num_bytes,
                    })
                } else {
                    Ok(Value::Decimal(num))
                }
                // check num.bits() here
            }
            Value::Fixed(_, bytes) | Value::Bytes(bytes) => {
                if max_prec_for_len(bytes.len())? < precision {
                    Err(Error::ComparePrecisionAndSize {
                        precision,
                        num_bytes: bytes.len(),
                    })
                } else {
                    // precision and scale match, can we assume the underlying type can hold the data?
                    Ok(Value::Decimal(Decimal::from(bytes)))
                }
            }
            other => Err(Error::ResolveDecimal(other)),
        }
    }