Support MACADDR in Postgres (#1329)

Cargo.toml

@@ -59,6 +59,7 @@ all-types = [
     "time",
     "chrono",
     "ipnetwork",
+    "mac_address",
     "uuid",
     "bit-vec",
     "bstr",
@@ -121,6 +122,7 @@ bigdecimal = ["sqlx-core/bigdecimal", "sqlx-macros/bigdecimal"]
 decimal = ["sqlx-core/decimal", "sqlx-macros/decimal"]
 chrono = ["sqlx-core/chrono", "sqlx-macros/chrono"]
 ipnetwork = ["sqlx-core/ipnetwork", "sqlx-macros/ipnetwork"]
+mac_address = ["sqlx-core/mac_address", "sqlx-macros/mac_address"]
 uuid = ["sqlx-core/uuid", "sqlx-macros/uuid"]
 json = ["sqlx-core/json", "sqlx-macros/json"]
 time = ["sqlx-core/time", "sqlx-macros/time"]

sqlx-core/Cargo.toml

@@ -54,6 +54,7 @@ all-types = [
     "bigdecimal",
     "decimal",
     "ipnetwork",
+    "mac_address",
     "json",
     "uuid",
     "bit-vec",
@@ -125,6 +126,7 @@ hex = "0.4.2"
 hmac = { version = "0.10.1", default-features = false, optional = true }
 itoa = "0.4.5"
 ipnetwork = { version = "0.17.0", default-features = false, optional = true }
+mac_address = { version = "1.1", default-features = false, optional = true }
 libc = "0.2.71"
 libsqlite3-sys = { version = "0.22.0", optional = true, default-features = false, features = [
     "pkg-config",

sqlx-core/src/postgres/type_info.rs

@@ -198,6 +198,8 @@ impl PgTypeInfo {
         .contains(self)
         {
             Some("ipnetwork")
+        } else if [PgTypeInfo::MACADDR].contains(self) {
+            Some("mac_address")
         } else if [PgTypeInfo::NUMERIC, PgTypeInfo::NUMERIC_ARRAY].contains(self) {
             Some("bigdecimal")
         } else {

sqlx-core/src/postgres/types/mac_address.rs

@@ -0,0 +1,63 @@
+use mac_address::MacAddress;
+
+use std::convert::TryInto;
+
+use crate::decode::Decode;
+use crate::encode::{Encode, IsNull};
+use crate::error::BoxDynError;
+use crate::postgres::{PgArgumentBuffer, PgTypeInfo, PgValueFormat, PgValueRef, Postgres};
+use crate::types::Type;
+
+impl Type<Postgres> for MacAddress {
+    fn type_info() -> PgTypeInfo {
+        PgTypeInfo::MACADDR
+    }
+
+    fn compatible(ty: &PgTypeInfo) -> bool {
+        *ty == PgTypeInfo::MACADDR
+    }
+}
+
+impl Type<Postgres> for [MacAddress] {
+    fn type_info() -> PgTypeInfo {
+        PgTypeInfo::MACADDR_ARRAY
+    }
+}
+
+impl Type<Postgres> for Vec<MacAddress> {
+    fn type_info() -> PgTypeInfo {
+        <[MacAddress] as Type<Postgres>>::type_info()
+    }
+
+    fn compatible(ty: &PgTypeInfo) -> bool {
+        <[MacAddress] as Type<Postgres>>::compatible(ty)
+    }
+}
+
+impl Encode<'_, Postgres> for MacAddress {
+    fn encode_by_ref(&self, buf: &mut PgArgumentBuffer) -> IsNull {
+        buf.extend_from_slice(&self.bytes()); // write just the address
+        IsNull::No
+    }
+
+    fn size_hint(&self) -> usize {
+        6
+    }
+}
+
+impl Decode<'_, Postgres> for MacAddress {
+    fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError> {
+        let bytes = match value.format() {
+            PgValueFormat::Binary => value.as_bytes()?,
+            PgValueFormat::Text => {
+                return Ok(value.as_str()?.parse()?);
+            }
+        };
+
+        if bytes.len() == 6 {
+            return Ok(MacAddress::new(bytes.try_into().unwrap()));
+        }
+
+        Err("invalid data received when expecting an MACADDR".into())
+    }
+}

sqlx-core/src/postgres/types/mod.rs

@@ -73,6 +73,14 @@
 //! |---------------------------------------|------------------------------------------------------|
 //! | `ipnetwork::IpNetwork`                | INET, CIDR                                           |
 //!
+//! ### [`mac_address`](https://crates.io/crates/mac_address)
+//!
+//! Requires the `mac_address` Cargo feature flag.
+//!
+//! | Rust type                             | Postgres type(s)                                     |
+//! |---------------------------------------|------------------------------------------------------|
+//! | `mac_address::MacAddress`             | MACADDR                                              |
+//!
 //! ### [`bit-vec`](https://crates.io/crates/bit-vec)
 //!
 //! Requires the `bit-vec` Cargo feature flag.
@@ -194,6 +202,9 @@ mod json;
 #[cfg(feature = "ipnetwork")]
 mod ipnetwork;
 
+#[cfg(feature = "mac_address")]
+mod mac_address;
+
 #[cfg(feature = "bit-vec")]
 mod bit_vec;
 

sqlx-core/src/types/mod.rs

@@ -75,6 +75,13 @@ pub mod ipnetwork {
     pub use ipnetwork::{IpNetwork, Ipv4Network, Ipv6Network};
 }
 
+#[cfg(feature = "mac_address")]
+#[cfg_attr(docsrs, doc(cfg(feature = "mac_address")))]
+pub mod mac_address {
+    #[doc(no_inline)]
+    pub use mac_address::MacAddress;
+}
+
 #[cfg(feature = "json")]
 pub use json::Json;
 

sqlx-macros/Cargo.toml

@@ -72,6 +72,7 @@ decimal = ["sqlx-core/decimal"]
 chrono = ["sqlx-core/chrono"]
 time = ["sqlx-core/time"]
 ipnetwork = ["sqlx-core/ipnetwork"]
+mac_address = ["sqlx-core/mac_address"]
 uuid = ["sqlx-core/uuid"]
 bit-vec = ["sqlx-core/bit-vec"]
 json = ["sqlx-core/json", "serde_json"]

sqlx-macros/src/database/postgres.rs

@@ -60,6 +60,9 @@ impl_database_ext! {
         #[cfg(feature = "ipnetwork")]
         sqlx::types::ipnetwork::IpNetwork,
 
+        #[cfg(feature = "mac_address")]
+        sqlx::types::mac_address::MacAddress,
+
         #[cfg(feature = "json")]
         serde_json::Value,
 
@@ -113,6 +116,9 @@ impl_database_ext! {
         #[cfg(feature = "ipnetwork")]
         Vec<sqlx::types::ipnetwork::IpNetwork> | &[sqlx::types::ipnetwork::IpNetwork],
 
+        #[cfg(feature = "mac_address")]
+        Vec<sqlx::types::mac_address::MacAddress> | &[sqlx::types::mac_address::MacAddress],
+
         #[cfg(feature = "json")]
         Vec<serde_json::Value> | &[serde_json::Value],
 

tests/postgres/types.rs

@@ -167,6 +167,14 @@ test_type!(ipnetwork<sqlx::types::ipnetwork::IpNetwork>(Postgres,
             .unwrap(),
 ));
 
+#[cfg(feature = "mac_address")]
+test_type!(mac_address<sqlx::types::mac_address::MacAddress>(Postgres,
+    "'00:01:02:03:04:05'::macaddr"
+        == "00:01:02:03:04:05"
+            .parse::<sqlx::types::mac_address::MacAddress>()
+            .unwrap()
+));
+
 #[cfg(feature = "bit-vec")]
 test_type!(bitvec<sqlx::types::BitVec>(
     Postgres,
@@ -201,6 +209,15 @@ test_type!(ipnetwork_vec<Vec<sqlx::types::ipnetwork::IpNetwork>>(Postgres,
         ]
 ));
 
+#[cfg(feature = "mac_address")]
+test_type!(mac_address_vec<Vec<sqlx::types::mac_address::MacAddress>>(Postgres,
+    "'{01:02:03:04:05:06,FF:FF:FF:FF:FF:FF}'::inet[]"
+        == vec![
+           "01:02:03:04:05:06".parse::<sqlx::types::mac_address::MacAddress>().unwrap(),
+           "FF:FF:FF:FF:FF:FF".parse::<sqlx::types::mac_address::MacAddress>().unwrap()
+        ]
+));
+
 #[cfg(feature = "chrono")]
 mod chrono {
     use super::*;