fn parse_precision_and_scale()

in avro/src/schema.rs [1445:1479]

• 33 lines of code
• 4 McCabe index (conditional complexity)

    fn parse_precision_and_scale(
        complex: &Map<String, Value>,
    ) -> Result<(Precision, Scale), Error> {
        fn get_decimal_integer(
            complex: &Map<String, Value>,
            key: &'static str,
        ) -> Result<DecimalMetadata, Error> {
            match complex.get(key) {
                Some(Value::Number(value)) => parse_json_integer_for_decimal(value),
                None => {
                    if key == "scale" {
                        Ok(0)
                    } else {
                        Err(Error::GetDecimalMetadataFromJson(key))
                    }
                }
                Some(value) => Err(Error::GetDecimalMetadataValueFromJson {
                    key: key.into(),
                    value: value.clone(),
                }),
            }
        }
        let precision = get_decimal_integer(complex, "precision")?;
        let scale = get_decimal_integer(complex, "scale")?;

        if precision < 1 {
            return Err(Error::DecimalPrecisionMuBePositive { precision });
        }

        if precision < scale {
            Err(Error::DecimalPrecisionLessThanScale { precision, scale })
        } else {
            Ok((precision, scale))
        }
    }