postgres_types/
private.rs

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1use crate::{FromSql, Type};
2pub use bytes::BytesMut;
3use std::error::Error;
4
5pub fn read_be_i32(buf: &mut &[u8]) -> Result<i32, Box<dyn Error + Sync + Send>> {
6    if buf.len() < 4 {
7        return Err("invalid buffer size".into());
8    }
9    let mut bytes = [0; 4];
10    bytes.copy_from_slice(&buf[..4]);
11    *buf = &buf[4..];
12    Ok(i32::from_be_bytes(bytes))
13}
14
15pub fn read_value<'a, T>(
16    type_: &Type,
17    buf: &mut &'a [u8],
18) -> Result<T, Box<dyn Error + Sync + Send>>
19where
20    T: FromSql<'a>,
21{
22    let len = read_be_i32(buf)?;
23    let value = if len < 0 {
24        None
25    } else {
26        if len as usize > buf.len() {
27            return Err("invalid buffer size".into());
28        }
29        let (head, tail) = buf.split_at(len as usize);
30        *buf = tail;
31        Some(head)
32    };
33    T::from_sql_nullable(type_, value)
34}
postgres_types/private.rs

postgres_types/
private.rs
