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conversion.rs
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conversion.rs
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
use bigdecimal::BigDecimal;
use half::f16;
use rust_decimal::prelude::*;
use rust_decimal::Decimal;
pub const NULL_STR: &str = "NULL";
pub fn bool_to_str(value: bool) -> String {
if value {
"true".to_string()
} else {
"false".to_string()
}
}
pub fn varchar_to_str(value: &str) -> String {
if value.is_empty() {
"(empty)".to_string()
} else {
value.to_string()
}
}
pub fn f16_to_str(value: f16) -> String {
if value.is_nan() {
"NaN".to_string()
} else if value == f16::INFINITY {
"Infinity".to_string()
} else if value == f16::NEG_INFINITY {
"-Infinity".to_string()
} else {
big_decimal_to_str(BigDecimal::from_str(&value.to_string()).unwrap())
}
}
pub fn f32_to_str(value: f32) -> String {
if value.is_nan() {
"NaN".to_string()
} else if value == f32::INFINITY {
"Infinity".to_string()
} else if value == f32::NEG_INFINITY {
"-Infinity".to_string()
} else {
big_decimal_to_str(BigDecimal::from_str(&value.to_string()).unwrap())
}
}
pub fn f64_to_str(value: f64) -> String {
if value.is_nan() {
"NaN".to_string()
} else if value == f64::INFINITY {
"Infinity".to_string()
} else if value == f64::NEG_INFINITY {
"-Infinity".to_string()
} else {
big_decimal_to_str(BigDecimal::from_str(&value.to_string()).unwrap())
}
}
pub fn i128_to_str(value: i128, scale: u32) -> String {
big_decimal_to_str(
BigDecimal::from_str(&Decimal::from_i128_with_scale(value, scale).to_string())
.unwrap(),
)
}
pub fn decimal_to_str(value: Decimal) -> String {
big_decimal_to_str(BigDecimal::from_str(&value.to_string()).unwrap())
}
pub fn big_decimal_to_str(value: BigDecimal) -> String {
value.round(12).normalized().to_string()
}