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// Copyright 2024 RisingWave Labs | ||
// | ||
// Licensed 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. | ||
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use risingwave_expr::{function, ExprError, Result}; | ||
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/// Given the dotted-quad representation of an IPv4 network address as a string, | ||
/// returns an integer that represents the numeric value of the address | ||
/// in network byte order (big endian). The returning value is a BIGINT (8-byte integer) | ||
/// because PG doesn't support unsigned 32-bit integer. | ||
/// | ||
/// Short-form IP addresses (such as '127.1' as a representation of '127.0.0.1') | ||
/// are NOT supported. | ||
/// | ||
/// This function is ported from MySQL. | ||
/// Ref: <https://dev.mysql.com/doc/refman/8.3/en/miscellaneous-functions.html#function_inet-aton>. | ||
/// | ||
/// # Example | ||
/// | ||
/// ```slt | ||
/// query I | ||
/// select inet_aton('10.0.5.9'); | ||
/// ---- | ||
/// 167773449 | ||
/// ``` | ||
#[function("inet_aton(varchar) -> int8")] | ||
pub fn inet_aton(str: &str) -> Result<i64> { | ||
let mut parts = str.split('.'); | ||
let mut result = 0; | ||
for _ in 0..4 { | ||
let part = parts.next().ok_or(ExprError::InvalidParam { | ||
name: "str", | ||
reason: format!("Invalid IP address: {}", &str).into(), | ||
})?; | ||
let part = part.parse::<u8>().map_err(|_| ExprError::InvalidParam { | ||
name: "str", | ||
reason: format!("Invalid IP address: {}", &str).into(), | ||
})?; | ||
result = (result << 8) | part as i64; | ||
} | ||
Ok(result) | ||
} | ||
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/// Given a numeric IPv4 network address in network byte order (big endian), | ||
/// returns the dotted-quad string representation of the address as a string. | ||
/// | ||
/// This function is ported from MySQL. | ||
/// Ref: <https://dev.mysql.com/doc/refman/8.3/en/miscellaneous-functions.html#function_inet-ntoa>. | ||
/// | ||
/// # Example | ||
/// | ||
/// ```slt | ||
/// query T | ||
/// select inet_ntoa(167773449); | ||
/// ---- | ||
/// 10.0.5.9 | ||
/// ``` | ||
#[function("inet_ntoa(int8) -> varchar")] | ||
pub fn inet_ntoa(mut num: i64) -> Result<Box<str>> { | ||
if (num > u32::MAX as i64) || (num < 0) { | ||
return Err(ExprError::InvalidParam { | ||
name: "num", | ||
reason: format!("Invalid IP number: {}", num).into(), | ||
}); | ||
} | ||
let mut parts = [0u8, 0, 0, 0]; | ||
for i in (0..4).rev() { | ||
parts[i] = (num & 0xFF) as u8; | ||
num >>= 8; | ||
} | ||
let str = parts | ||
.iter() | ||
.map(|&x| x.to_string()) | ||
.collect::<Vec<_>>() | ||
.join("."); | ||
Ok(str.into_boxed_str()) | ||
} | ||
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#[cfg(test)] | ||
mod tests { | ||
use std::assert_matches::assert_matches; | ||
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use super::*; | ||
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#[test] | ||
fn test_inet_aton() { | ||
assert_eq!(inet_aton("10.0.5.9").unwrap(), 167773449); | ||
assert_eq!(inet_aton("203.117.31.34").unwrap(), 3413450530); | ||
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if let ExprError::InvalidParam { name, reason } = inet_aton("127.1").unwrap_err() { | ||
assert_eq!(name, "str"); | ||
assert_eq!(reason, "Invalid IP address: 127.1".into()); | ||
} else { | ||
panic!("Expected InvalidParam error"); | ||
} | ||
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assert_matches!(inet_aton("127.0.1"), Err(ExprError::InvalidParam { .. })); | ||
assert_matches!(inet_aton("1.0.0.256"), Err(ExprError::InvalidParam { .. })); | ||
assert_matches!(inet_aton("1.0.0.-1"), Err(ExprError::InvalidParam { .. })); | ||
} | ||
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#[test] | ||
fn test_inet_ntoa() { | ||
assert_eq!(inet_ntoa(167773449).unwrap(), "10.0.5.9".into()); | ||
assert_eq!(inet_ntoa(3413450530).unwrap(), "203.117.31.34".into()); | ||
assert_eq!(inet_ntoa(0).unwrap(), "0.0.0.0".into()); | ||
assert_eq!( | ||
inet_ntoa(u32::MAX as i64).unwrap(), | ||
"255.255.255.255".into() | ||
); | ||
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if let ExprError::InvalidParam { name, reason } = inet_ntoa(-1).unwrap_err() { | ||
assert_eq!(name, "num"); | ||
assert_eq!(reason, "Invalid IP number: -1".into()); | ||
} else { | ||
panic!("Expected InvalidParam error"); | ||
} | ||
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assert_matches!( | ||
inet_ntoa(u32::MAX as i64 + 1), | ||
Err(ExprError::InvalidParam { .. }) | ||
); | ||
} | ||
} |
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