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use std::io::{self};
pub mod raw;
pub fn lenenc_int_len(x: u64) -> u64 {
if x < 251 {
1
} else if x < 65_536 {
3
} else if x < 16_777_216 {
4
} else {
9
}
}
pub fn lenenc_str_len(s: &[u8]) -> u64 {
let len = s.len() as u64;
lenenc_int_len(len) + len
}
pub(crate) fn unexpected_buf_eof() -> io::Error {
io::Error::new(
io::ErrorKind::UnexpectedEof,
"can't parse: buf doesn't have enough data",
)
}
pub fn split_version<T: AsRef<[u8]>>(version_str: T) -> (u8, u8, u8) {
let bytes = version_str.as_ref();
let mut offset = 0;
let mut nums = [0_u8; 3];
for i in 0..=2 {
match lexical::parse_partial::<u8, _>(&bytes[offset..]) {
Ok((x, count))
if count > 0
&& (i != 0
|| (bytes.len() > offset + count && bytes[offset + count] == b'.')) =>
{
offset += count + 1;
nums[i] = x;
}
_ => {
nums = [0_u8; 3];
break;
}
}
}
(nums[0], nums[1], nums[2])
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn should_split_version() {
assert_eq!((1, 2, 3), split_version("1.2.3"));
assert_eq!((10, 20, 30), split_version("10.20.30foo"));
assert_eq!((0, 0, 0), split_version("100.200.300foo"));
assert_eq!((0, 0, 0), split_version("100.200foo"));
assert_eq!((0, 0, 0), split_version("1,2.3"));
}
}