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use byteorder::{BigEndian, ByteOrder};
#[cfg(feature = "serde")]
use serde::{de::Deserializer, ser::Serializer, Deserialize, Serialize};
use crate::decode::Decode;
use crate::encode::{Encode, IsNull};
use crate::error::BoxDynError;
use crate::postgres::{
PgArgumentBuffer, PgHasArrayType, PgTypeInfo, PgValueFormat, PgValueRef, Postgres,
};
use crate::types::Type;
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, Default)]
pub struct Oid(
pub u32,
);
impl Oid {
pub(crate) fn incr_one(&mut self) {
self.0 = self.0.wrapping_add(1);
}
}
impl Type<Postgres> for Oid {
fn type_info() -> PgTypeInfo {
PgTypeInfo::OID
}
}
impl PgHasArrayType for Oid {
fn array_type_info() -> PgTypeInfo {
PgTypeInfo::OID_ARRAY
}
}
impl Encode<'_, Postgres> for Oid {
fn encode_by_ref(&self, buf: &mut PgArgumentBuffer) -> IsNull {
buf.extend(&self.0.to_be_bytes());
IsNull::No
}
}
impl Decode<'_, Postgres> for Oid {
fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError> {
Ok(Self(match value.format() {
PgValueFormat::Binary => BigEndian::read_u32(value.as_bytes()?),
PgValueFormat::Text => value.as_str()?.parse()?,
}))
}
}
#[cfg(feature = "serde")]
impl Serialize for Oid {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
self.0.serialize(serializer)
}
}
#[cfg(feature = "serde")]
impl<'de> Deserialize<'de> for Oid {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
u32::deserialize(deserializer).map(Self)
}
}