use std::convert::TryInto;
use std::io::prelude::*;
use crate::deserialize::{self, FromSql};
use crate::pg::{Pg, PgValue};
use crate::serialize::{self, IsNull, Output, ToSql};
use crate::sql_types::MacAddr;
#[allow(dead_code)]
mod foreign_derives {
use super::*;
use crate::deserialize::FromSqlRow;
use crate::expression::AsExpression;
#[derive(AsExpression, FromSqlRow)]
#[diesel(foreign_derive)]
#[diesel(sql_type = MacAddr)]
struct ByteArrayProxy([u8; 6]);
}
#[cfg(feature = "postgres_backend")]
impl FromSql<MacAddr, Pg> for [u8; 6] {
fn from_sql(value: PgValue<'_>) -> deserialize::Result<Self> {
value
.as_bytes()
.try_into()
.map_err(|_| "invalid network address format: input isn't 6 bytes.".into())
}
}
#[cfg(feature = "postgres_backend")]
impl ToSql<MacAddr, Pg> for [u8; 6] {
fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> serialize::Result {
out.write_all(&self[..])
.map(|_| IsNull::No)
.map_err(Into::into)
}
}
#[test]
fn macaddr_roundtrip() {
use crate::query_builder::bind_collector::ByteWrapper;
let mut buffer = Vec::new();
let mut bytes = Output::test(ByteWrapper(&mut buffer));
let input_address = [0x52, 0x54, 0x00, 0xfb, 0xc6, 0x16];
ToSql::<MacAddr, Pg>::to_sql(&input_address, &mut bytes).unwrap();
let output_address: [u8; 6] = FromSql::from_sql(PgValue::for_test(&buffer)).unwrap();
assert_eq!(input_address, output_address);
}