diff options
Diffstat (limited to 'third_party/rust/serde_bytes')
| -rw-r--r-- | third_party/rust/serde_bytes/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/Cargo.toml | 56 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/LICENSE-APACHE | 176 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/LICENSE-MIT | 23 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/README.md | 54 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/src/bytebuf.rs | 253 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/src/bytes.rs | 172 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/src/de.rs | 229 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/src/lib.rs | 113 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/src/ser.rs | 136 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/tests/test_derive.rs | 101 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/tests/test_partialeq.rs | 15 | ||||
| -rw-r--r-- | third_party/rust/serde_bytes/tests/test_serde.rs | 59 |
13 files changed, 1388 insertions, 0 deletions
diff --git a/third_party/rust/serde_bytes/.cargo-checksum.json b/third_party/rust/serde_bytes/.cargo-checksum.json new file mode 100644 index 0000000000..27ae813b4f --- /dev/null +++ b/third_party/rust/serde_bytes/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"e3f6c9804e4d0ed098b931d2823029db07e50733a87896d9061815d05b998deb","LICENSE-APACHE":"62c7a1e35f56406896d7aa7ca52d0cc0d272ac022b5d2796e7d6905db8a3636a","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","README.md":"f544725bdd52ea9c6ad7a4240b64acce9ca51d7776b1d7fd157d286b5f01260e","src/bytebuf.rs":"4a03836f0e6cb04c9ea3db4880e1ab58d99ed9157a15470c54b60c332bbd8312","src/bytes.rs":"2bc824cc618b9db549a53899a4bbddc95698490dc935f4a41ae9a620524a0392","src/de.rs":"4ca87484a7015be6104022dabfaa50bcb296e1d809edbf040122d75515dadab2","src/lib.rs":"a923700a65bcdf312ed5eeba18e95b4b81078e1e3991aabfcaf3eb9d684e461e","src/ser.rs":"be02fcc1fb228caf6ce6f564bee8041579bd23069d75659ac665ce8e82b2c05d","tests/test_derive.rs":"ea246011c4b5008df6c5170640e806be8f553d0a7e7801254dadd156440c95bb","tests/test_partialeq.rs":"3ff7ba1dfa9f5b0213cc53d072364a9a1f00399a758b34c02d90e77da1536d94","tests/test_serde.rs":"10c980110505d47c7b8a876dcb911154339aa52124b6f1de5636001bcf39b56d"},"package":"416bda436f9aab92e02c8e10d49a15ddd339cea90b6e340fe51ed97abb548294"}
\ No newline at end of file diff --git a/third_party/rust/serde_bytes/Cargo.toml b/third_party/rust/serde_bytes/Cargo.toml new file mode 100644 index 0000000000..2e75f8ae7f --- /dev/null +++ b/third_party/rust/serde_bytes/Cargo.toml @@ -0,0 +1,56 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies. +# +# If you are reading this file be aware that the original Cargo.toml +# will likely look very different (and much more reasonable). +# See Cargo.toml.orig for the original contents. + +[package] +edition = "2018" +rust-version = "1.31" +name = "serde_bytes" +version = "0.11.9" +authors = ["David Tolnay <dtolnay@gmail.com>"] +description = "Optimized handling of `&[u8]` and `Vec<u8>` for Serde" +documentation = "https://docs.rs/serde_bytes" +readme = "README.md" +keywords = [ + "serde", + "serialization", + "no_std", + "bytes", +] +categories = [ + "encoding", + "no-std", +] +license = "MIT OR Apache-2.0" +repository = "https://github.com/serde-rs/bytes" + +[package.metadata.docs.rs] +targets = ["x86_64-unknown-linux-gnu"] + +[lib] +doc-scrape-examples = false + +[dependencies.serde] +version = "1.0" +default-features = false + +[dev-dependencies.bincode] +version = "1.0" + +[dev-dependencies.serde_derive] +version = "1.0" + +[dev-dependencies.serde_test] +version = "1.0" + +[features] +alloc = ["serde/alloc"] +default = ["std"] +std = ["serde/std"] diff --git a/third_party/rust/serde_bytes/LICENSE-APACHE b/third_party/rust/serde_bytes/LICENSE-APACHE new file mode 100644 index 0000000000..1b5ec8b78e --- /dev/null +++ b/third_party/rust/serde_bytes/LICENSE-APACHE @@ -0,0 +1,176 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/third_party/rust/serde_bytes/README.md b/third_party/rust/serde_bytes/README.md new file mode 100644 index 0000000000..e0a0e9f040 --- /dev/null +++ b/third_party/rust/serde_bytes/README.md @@ -0,0 +1,54 @@ +# serde\_bytes [](https://github.com/serde-rs/bytes/actions?query=branch%3Amaster) [](https://crates.io/crates/serde_bytes) + +Wrapper types to enable optimized handling of `&[u8]` and `Vec<u8>`. + +```toml +[dependencies] +serde_bytes = "0.11" +``` + +## Explanation + +Without specialization, Rust forces Serde to treat `&[u8]` just like any +other slice and `Vec<u8>` just like any other vector. In reality this +particular slice and vector can often be serialized and deserialized in a +more efficient, compact representation in many formats. + +When working with such a format, you can opt into specialized handling of +`&[u8]` by wrapping it in `serde_bytes::Bytes` and `Vec<u8>` by wrapping it +in `serde_bytes::ByteBuf`. + +Additionally this crate supports the Serde `with` attribute to enable efficient +handling of `&[u8]` and `Vec<u8>` in structs without needing a wrapper type. + +## Example + +```rust +use serde::{Deserialize, Serialize}; + +#[derive(Deserialize, Serialize)] +struct Efficient<'a> { + #[serde(with = "serde_bytes")] + bytes: &'a [u8], + + #[serde(with = "serde_bytes")] + byte_buf: Vec<u8>, +} +``` + +<br> + +#### License + +<sup> +Licensed under either of <a href="LICENSE-APACHE">Apache License, Version +2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option. +</sup> + +<br> + +<sub> +Unless you explicitly state otherwise, any contribution intentionally submitted +for inclusion in this crate by you, as defined in the Apache-2.0 license, shall +be dual licensed as above, without any additional terms or conditions. +</sub> diff --git a/third_party/rust/serde_bytes/src/bytebuf.rs b/third_party/rust/serde_bytes/src/bytebuf.rs new file mode 100644 index 0000000000..0c2daa6e25 --- /dev/null +++ b/third_party/rust/serde_bytes/src/bytebuf.rs @@ -0,0 +1,253 @@ +use core::borrow::{Borrow, BorrowMut}; +use core::cmp::{self, Ordering}; +use core::fmt::{self, Debug}; +use core::hash::{Hash, Hasher}; +use core::ops::{Deref, DerefMut}; + +#[cfg(feature = "alloc")] +use alloc::boxed::Box; +#[cfg(feature = "alloc")] +use alloc::string::String; +#[cfg(feature = "alloc")] +use alloc::vec::Vec; + +use serde::de::{Deserialize, Deserializer, Error, SeqAccess, Visitor}; +use serde::ser::{Serialize, Serializer}; + +use crate::Bytes; + +/// Wrapper around `Vec<u8>` to serialize and deserialize efficiently. +/// +/// ``` +/// use std::collections::HashMap; +/// use std::io; +/// +/// use serde_bytes::ByteBuf; +/// +/// fn deserialize_bytebufs() -> bincode::Result<()> { +/// let example_data = [ +/// 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 116, +/// 119, 111, 1, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 111, 110, 101]; +/// +/// let map: HashMap<u32, ByteBuf> = bincode::deserialize(&example_data[..])?; +/// +/// println!("{:?}", map); +/// +/// Ok(()) +/// } +/// # +/// # fn main() { +/// # deserialize_bytebufs().unwrap(); +/// # } +/// ``` +#[derive(Clone, Default, Eq, Ord)] +pub struct ByteBuf { + bytes: Vec<u8>, +} + +impl ByteBuf { + /// Construct a new, empty `ByteBuf`. + pub fn new() -> Self { + ByteBuf::from(Vec::new()) + } + + /// Construct a new, empty `ByteBuf` with the specified capacity. + pub fn with_capacity(cap: usize) -> Self { + ByteBuf::from(Vec::with_capacity(cap)) + } + + /// Wrap existing bytes in a `ByteBuf`. + pub fn from<T: Into<Vec<u8>>>(bytes: T) -> Self { + ByteBuf { + bytes: bytes.into(), + } + } + + /// Unwrap the vector of byte underlying this `ByteBuf`. + pub fn into_vec(self) -> Vec<u8> { + self.bytes + } + + #[allow(missing_docs)] + pub fn into_boxed_bytes(self) -> Box<Bytes> { + self.bytes.into_boxed_slice().into() + } + + // This would hit "cannot move out of borrowed content" if invoked through + // the Deref impl; make it just work. + #[doc(hidden)] + pub fn into_boxed_slice(self) -> Box<[u8]> { + self.bytes.into_boxed_slice() + } + + #[doc(hidden)] + #[allow(clippy::should_implement_trait)] + pub fn into_iter(self) -> <Vec<u8> as IntoIterator>::IntoIter { + self.bytes.into_iter() + } +} + +impl Debug for ByteBuf { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + Debug::fmt(&self.bytes, f) + } +} + +impl AsRef<[u8]> for ByteBuf { + fn as_ref(&self) -> &[u8] { + &self.bytes + } +} + +impl AsMut<[u8]> for ByteBuf { + fn as_mut(&mut self) -> &mut [u8] { + &mut self.bytes + } +} + +impl Deref for ByteBuf { + type Target = Vec<u8>; + + fn deref(&self) -> &Self::Target { + &self.bytes + } +} + +impl DerefMut for ByteBuf { + fn deref_mut(&mut self) -> &mut Self::Target { + &mut self.bytes + } +} + +impl Borrow<Bytes> for ByteBuf { + fn borrow(&self) -> &Bytes { + Bytes::new(&self.bytes) + } +} + +impl BorrowMut<Bytes> for ByteBuf { + fn borrow_mut(&mut self) -> &mut Bytes { + unsafe { &mut *(&mut self.bytes as &mut [u8] as *mut [u8] as *mut Bytes) } + } +} + +impl<Rhs> PartialEq<Rhs> for ByteBuf +where + Rhs: ?Sized + AsRef<[u8]>, +{ + fn eq(&self, other: &Rhs) -> bool { + self.as_ref().eq(other.as_ref()) + } +} + +impl<Rhs> PartialOrd<Rhs> for ByteBuf +where + Rhs: ?Sized + AsRef<[u8]>, +{ + fn partial_cmp(&self, other: &Rhs) -> Option<Ordering> { + self.as_ref().partial_cmp(other.as_ref()) + } +} + +impl Hash for ByteBuf { + fn hash<H: Hasher>(&self, state: &mut H) { + self.bytes.hash(state); + } +} + +impl IntoIterator for ByteBuf { + type Item = u8; + type IntoIter = <Vec<u8> as IntoIterator>::IntoIter; + + fn into_iter(self) -> Self::IntoIter { + self.bytes.into_iter() + } +} + +impl<'a> IntoIterator for &'a ByteBuf { + type Item = &'a u8; + type IntoIter = <&'a [u8] as IntoIterator>::IntoIter; + + fn into_iter(self) -> Self::IntoIter { + self.bytes.iter() + } +} + +impl<'a> IntoIterator for &'a mut ByteBuf { + type Item = &'a mut u8; + type IntoIter = <&'a mut [u8] as IntoIterator>::IntoIter; + + fn into_iter(self) -> Self::IntoIter { + self.bytes.iter_mut() + } +} + +impl Serialize for ByteBuf { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(&self.bytes) + } +} + +struct ByteBufVisitor; + +impl<'de> Visitor<'de> for ByteBufVisitor { + type Value = ByteBuf; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + formatter.write_str("byte array") + } + + fn visit_seq<V>(self, mut visitor: V) -> Result<ByteBuf, V::Error> + where + V: SeqAccess<'de>, + { + let len = cmp::min(visitor.size_hint().unwrap_or(0), 4096); + let mut bytes = Vec::with_capacity(len); + + while let Some(b) = visitor.next_element()? { + bytes.push(b); + } + + Ok(ByteBuf::from(bytes)) + } + + fn visit_bytes<E>(self, v: &[u8]) -> Result<ByteBuf, E> + where + E: Error, + { + Ok(ByteBuf::from(v)) + } + + fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<ByteBuf, E> + where + E: Error, + { + Ok(ByteBuf::from(v)) + } + + fn visit_str<E>(self, v: &str) -> Result<ByteBuf, E> + where + E: Error, + { + Ok(ByteBuf::from(v)) + } + + fn visit_string<E>(self, v: String) -> Result<ByteBuf, E> + where + E: Error, + { + Ok(ByteBuf::from(v)) + } +} + +impl<'de> Deserialize<'de> for ByteBuf { + fn deserialize<D>(deserializer: D) -> Result<ByteBuf, D::Error> + where + D: Deserializer<'de>, + { + deserializer.deserialize_byte_buf(ByteBufVisitor) + } +} diff --git a/third_party/rust/serde_bytes/src/bytes.rs b/third_party/rust/serde_bytes/src/bytes.rs new file mode 100644 index 0000000000..ad0902b434 --- /dev/null +++ b/third_party/rust/serde_bytes/src/bytes.rs @@ -0,0 +1,172 @@ +use core::cmp::Ordering; +use core::fmt::{self, Debug}; +use core::hash::{Hash, Hasher}; +use core::ops::{Deref, DerefMut}; + +#[cfg(feature = "alloc")] +use alloc::borrow::ToOwned; + +#[cfg(feature = "alloc")] +use alloc::boxed::Box; + +#[cfg(any(feature = "std", feature = "alloc"))] +use crate::ByteBuf; + +use serde::de::{Deserialize, Deserializer}; +use serde::ser::{Serialize, Serializer}; + +/// Wrapper around `[u8]` to serialize and deserialize efficiently. +/// +/// ``` +/// use std::collections::HashMap; +/// use std::io; +/// +/// use serde_bytes::Bytes; +/// +/// fn print_encoded_cache() -> bincode::Result<()> { +/// let mut cache = HashMap::new(); +/// cache.insert(3, Bytes::new(b"three")); +/// cache.insert(2, Bytes::new(b"two")); +/// cache.insert(1, Bytes::new(b"one")); +/// +/// bincode::serialize_into(&mut io::stdout(), &cache) +/// } +/// # +/// # fn main() { +/// # print_encoded_cache().unwrap(); +/// # } +/// ``` +#[derive(Eq, Ord)] +#[cfg_attr(not(doc), repr(transparent))] +pub struct Bytes { + bytes: [u8], +} + +impl Bytes { + /// Wrap an existing `&[u8]`. + pub fn new(bytes: &[u8]) -> &Self { + unsafe { &*(bytes as *const [u8] as *const Bytes) } + } +} + +impl Debug for Bytes { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + Debug::fmt(&self.bytes, f) + } +} + +impl AsRef<[u8]> for Bytes { + fn as_ref(&self) -> &[u8] { + &self.bytes + } +} + +impl AsMut<[u8]> for Bytes { + fn as_mut(&mut self) -> &mut [u8] { + &mut self.bytes + } +} + +impl Deref for Bytes { + type Target = [u8]; + + fn deref(&self) -> &Self::Target { + &self.bytes + } +} + +impl DerefMut for Bytes { + fn deref_mut(&mut self) -> &mut Self::Target { + &mut self.bytes + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl ToOwned for Bytes { + type Owned = ByteBuf; + + fn to_owned(&self) -> Self::Owned { + ByteBuf::from(&self.bytes) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl From<Box<[u8]>> for Box<Bytes> { + fn from(bytes: Box<[u8]>) -> Self { + unsafe { Box::from_raw(Box::into_raw(bytes) as *mut Bytes) } + } +} + +impl<'a> Default for &'a Bytes { + fn default() -> Self { + Bytes::new(&[]) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl Default for Box<Bytes> { + fn default() -> Self { + ByteBuf::new().into_boxed_bytes() + } +} + +impl<Rhs> PartialEq<Rhs> for Bytes +where + Rhs: ?Sized + AsRef<[u8]>, +{ + fn eq(&self, other: &Rhs) -> bool { + self.as_ref().eq(other.as_ref()) + } +} + +impl<Rhs> PartialOrd<Rhs> for Bytes +where + Rhs: ?Sized + AsRef<[u8]>, +{ + fn partial_cmp(&self, other: &Rhs) -> Option<Ordering> { + self.as_ref().partial_cmp(other.as_ref()) + } +} + +impl Hash for Bytes { + fn hash<H: Hasher>(&self, state: &mut H) { + self.bytes.hash(state); + } +} + +impl<'a> IntoIterator for &'a Bytes { + type Item = &'a u8; + type IntoIter = <&'a [u8] as IntoIterator>::IntoIter; + + fn into_iter(self) -> Self::IntoIter { + self.bytes.iter() + } +} + +impl<'a> IntoIterator for &'a mut Bytes { + type Item = &'a mut u8; + type IntoIter = <&'a mut [u8] as IntoIterator>::IntoIter; + + fn into_iter(self) -> Self::IntoIter { + self.bytes.iter_mut() + } +} + +impl Serialize for Bytes { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(&self.bytes) + } +} + +impl<'a, 'de: 'a> Deserialize<'de> for &'a Bytes { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + // serde::Deserialize for &[u8] is already optimized, so simply forward to that. + Deserialize::deserialize(deserializer).map(Bytes::new) + } +} diff --git a/third_party/rust/serde_bytes/src/de.rs b/third_party/rust/serde_bytes/src/de.rs new file mode 100644 index 0000000000..e4a4732eea --- /dev/null +++ b/third_party/rust/serde_bytes/src/de.rs @@ -0,0 +1,229 @@ +use crate::Bytes; +use core::fmt; +use core::marker::PhantomData; +use serde::de::{Error, Visitor}; +use serde::Deserializer; + +#[cfg(any(feature = "std", feature = "alloc"))] +use crate::ByteBuf; + +#[cfg(any(feature = "std", feature = "alloc"))] +use core::cmp; + +#[cfg(feature = "alloc")] +use alloc::borrow::Cow; +#[cfg(all(feature = "std", not(feature = "alloc")))] +use std::borrow::Cow; + +#[cfg(feature = "alloc")] +use alloc::boxed::Box; +#[cfg(feature = "alloc")] +use alloc::string::String; +#[cfg(feature = "alloc")] +use alloc::vec::Vec; + +#[cfg(any(feature = "std", feature = "alloc"))] +use serde::de::SeqAccess; + +/// Types that can be deserialized via `#[serde(with = "serde_bytes")]`. +pub trait Deserialize<'de>: Sized { + #[allow(missing_docs)] + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>; +} + +impl<'de: 'a, 'a> Deserialize<'de> for &'a [u8] { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + // serde::Deserialize for &[u8] is already optimized, so simply forward to that. + serde::Deserialize::deserialize(deserializer) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'de> Deserialize<'de> for Vec<u8> { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + Deserialize::deserialize(deserializer).map(ByteBuf::into_vec) + } +} + +impl<'de: 'a, 'a> Deserialize<'de> for &'a Bytes { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + // serde::Deserialize for &[u8] is already optimized, so simply forward to that. + serde::Deserialize::deserialize(deserializer).map(Bytes::new) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'de> Deserialize<'de> for ByteBuf { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + // Via the serde::Deserialize impl for ByteBuf. + serde::Deserialize::deserialize(deserializer) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, [u8]> { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + struct CowVisitor; + + impl<'de> Visitor<'de> for CowVisitor { + type Value = Cow<'de, [u8]>; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + formatter.write_str("a byte array") + } + + fn visit_borrowed_bytes<E>(self, v: &'de [u8]) -> Result<Self::Value, E> + where + E: Error, + { + Ok(Cow::Borrowed(v)) + } + + fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E> + where + E: Error, + { + Ok(Cow::Borrowed(v.as_bytes())) + } + + fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> + where + E: Error, + { + Ok(Cow::Owned(v.to_vec())) + } + + fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> + where + E: Error, + { + Ok(Cow::Owned(v.as_bytes().to_vec())) + } + + fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> + where + E: Error, + { + Ok(Cow::Owned(v)) + } + + fn visit_string<E>(self, v: String) -> Result<Self::Value, E> + where + E: Error, + { + Ok(Cow::Owned(v.into_bytes())) + } + + fn visit_seq<V>(self, mut visitor: V) -> Result<Self::Value, V::Error> + where + V: SeqAccess<'de>, + { + let len = cmp::min(visitor.size_hint().unwrap_or(0), 4096); + let mut bytes = Vec::with_capacity(len); + + while let Some(b) = visitor.next_element()? { + bytes.push(b); + } + + Ok(Cow::Owned(bytes)) + } + } + + deserializer.deserialize_bytes(CowVisitor) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, Bytes> { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + let cow: Cow<[u8]> = Deserialize::deserialize(deserializer)?; + match cow { + Cow::Borrowed(bytes) => Ok(Cow::Borrowed(Bytes::new(bytes))), + Cow::Owned(bytes) => Ok(Cow::Owned(ByteBuf::from(bytes))), + } + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'de> Deserialize<'de> for Box<[u8]> { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + Deserialize::deserialize(deserializer).map(Vec::into_boxed_slice) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'de> Deserialize<'de> for Box<Bytes> { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + let bytes: Box<[u8]> = Deserialize::deserialize(deserializer)?; + Ok(bytes.into()) + } +} + +impl<'de, T> Deserialize<'de> for Option<T> +where + T: Deserialize<'de>, +{ + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: Deserializer<'de>, + { + struct BytesVisitor<T> { + out: PhantomData<T>, + } + + impl<'de, T> Visitor<'de> for BytesVisitor<T> + where + T: Deserialize<'de>, + { + type Value = Option<T>; + + fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result { + f.write_str("optional byte array") + } + + fn visit_unit<E: Error>(self) -> Result<Self::Value, E> { + Ok(None) + } + + fn visit_none<E: Error>(self) -> Result<Self::Value, E> { + Ok(None) + } + + fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error> + where + D: Deserializer<'de>, + { + T::deserialize(deserializer).map(Some) + } + } + + let visitor = BytesVisitor { out: PhantomData }; + deserializer.deserialize_option(visitor) + } +} diff --git a/third_party/rust/serde_bytes/src/lib.rs b/third_party/rust/serde_bytes/src/lib.rs new file mode 100644 index 0000000000..871d6cbcb9 --- /dev/null +++ b/third_party/rust/serde_bytes/src/lib.rs @@ -0,0 +1,113 @@ +//! Wrapper types to enable optimized handling of `&[u8]` and `Vec<u8>`. +//! +//! Without specialization, Rust forces Serde to treat `&[u8]` just like any +//! other slice and `Vec<u8>` just like any other vector. In reality this +//! particular slice and vector can often be serialized and deserialized in a +//! more efficient, compact representation in many formats. +//! +//! When working with such a format, you can opt into specialized handling of +//! `&[u8]` by wrapping it in `serde_bytes::Bytes` and `Vec<u8>` by wrapping it +//! in `serde_bytes::ByteBuf`. +//! +//! Additionally this crate supports the Serde `with` attribute to enable +//! efficient handling of `&[u8]` and `Vec<u8>` in structs without needing a +//! wrapper type. +//! +//! ``` +//! # use serde_derive::{Deserialize, Serialize}; +//! use serde::{Deserialize, Serialize}; +//! +//! #[derive(Deserialize, Serialize)] +//! struct Efficient<'a> { +//! #[serde(with = "serde_bytes")] +//! bytes: &'a [u8], +//! +//! #[serde(with = "serde_bytes")] +//! byte_buf: Vec<u8>, +//! } +//! ``` + +#![doc(html_root_url = "https://docs.rs/serde_bytes/0.11.9")] +#![cfg_attr(not(feature = "std"), no_std)] +#![deny(missing_docs)] +#![allow( + clippy::missing_errors_doc, + clippy::must_use_candidate, + clippy::needless_doctest_main +)] + +mod bytes; +mod de; +mod ser; + +#[cfg(any(feature = "std", feature = "alloc"))] +mod bytebuf; + +#[cfg(feature = "alloc")] +extern crate alloc; + +#[cfg(any(feature = "std", feature = "alloc"))] +use serde::Deserializer; + +use serde::Serializer; + +pub use crate::bytes::Bytes; +pub use crate::de::Deserialize; +pub use crate::ser::Serialize; + +#[cfg(any(feature = "std", feature = "alloc"))] +pub use crate::bytebuf::ByteBuf; + +/// Serde `serialize_with` function to serialize bytes efficiently. +/// +/// This function can be used with either of the following Serde attributes: +/// +/// - `#[serde(with = "serde_bytes")]` +/// - `#[serde(serialize_with = "serde_bytes::serialize")]` +/// +/// ``` +/// # use serde_derive::Serialize; +/// use serde::Serialize; +/// +/// #[derive(Serialize)] +/// struct Efficient<'a> { +/// #[serde(with = "serde_bytes")] +/// bytes: &'a [u8], +/// +/// #[serde(with = "serde_bytes")] +/// byte_buf: Vec<u8>, +/// } +/// ``` +pub fn serialize<T, S>(bytes: &T, serializer: S) -> Result<S::Ok, S::Error> +where + T: ?Sized + Serialize, + S: Serializer, +{ + Serialize::serialize(bytes, serializer) +} + +/// Serde `deserialize_with` function to deserialize bytes efficiently. +/// +/// This function can be used with either of the following Serde attributes: +/// +/// - `#[serde(with = "serde_bytes")]` +/// - `#[serde(deserialize_with = "serde_bytes::deserialize")]` +/// +/// ``` +/// # use serde_derive::Deserialize; +/// use serde::Deserialize; +/// +/// #[derive(Deserialize)] +/// struct Packet { +/// #[serde(with = "serde_bytes")] +/// payload: Vec<u8>, +/// } +/// ``` +#[cfg(any(feature = "std", feature = "alloc"))] +pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error> +where + T: Deserialize<'de>, + D: Deserializer<'de>, +{ + Deserialize::deserialize(deserializer) +} diff --git a/third_party/rust/serde_bytes/src/ser.rs b/third_party/rust/serde_bytes/src/ser.rs new file mode 100644 index 0000000000..1cbed9f757 --- /dev/null +++ b/third_party/rust/serde_bytes/src/ser.rs @@ -0,0 +1,136 @@ +use crate::Bytes; +use serde::Serializer; + +#[cfg(any(feature = "std", feature = "alloc"))] +use crate::ByteBuf; + +#[cfg(feature = "alloc")] +use alloc::borrow::Cow; +#[cfg(all(feature = "std", not(feature = "alloc")))] +use std::borrow::Cow; + +#[cfg(feature = "alloc")] +use alloc::boxed::Box; + +#[cfg(feature = "alloc")] +use alloc::vec::Vec; + +/// Types that can be serialized via `#[serde(with = "serde_bytes")]`. +pub trait Serialize { + #[allow(missing_docs)] + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer; +} + +impl Serialize for [u8] { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(self) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl Serialize for Vec<u8> { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(self) + } +} + +impl Serialize for Bytes { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(self) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl Serialize for ByteBuf { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(self) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a> Serialize for Cow<'a, [u8]> { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(self) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a> Serialize for Cow<'a, Bytes> { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_bytes(self) + } +} + +impl<'a, T> Serialize for &'a T +where + T: ?Sized + Serialize, +{ + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + (**self).serialize(serializer) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<T> Serialize for Box<T> +where + T: ?Sized + Serialize, +{ + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + (**self).serialize(serializer) + } +} + +impl<T> Serialize for Option<T> +where + T: Serialize, +{ + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + struct AsBytes<T>(T); + + impl<T> serde::Serialize for AsBytes<T> + where + T: Serialize, + { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + self.0.serialize(serializer) + } + } + + match self { + Some(b) => serializer.serialize_some(&AsBytes(b)), + None => serializer.serialize_none(), + } + } +} diff --git a/third_party/rust/serde_bytes/tests/test_derive.rs b/third_party/rust/serde_bytes/tests/test_derive.rs new file mode 100644 index 0000000000..c7e97f1ec4 --- /dev/null +++ b/third_party/rust/serde_bytes/tests/test_derive.rs @@ -0,0 +1,101 @@ +#![allow(clippy::derive_partial_eq_without_eq, clippy::ref_option_ref)] + +use serde_bytes::{ByteBuf, Bytes}; +use serde_derive::{Deserialize, Serialize}; +use serde_test::{assert_tokens, Token}; +use std::borrow::Cow; + +#[derive(Serialize, Deserialize, PartialEq, Debug)] +struct Test<'a> { + #[serde(with = "serde_bytes")] + slice: &'a [u8], + + #[serde(with = "serde_bytes")] + vec: Vec<u8>, + + #[serde(with = "serde_bytes")] + bytes: &'a Bytes, + + #[serde(with = "serde_bytes")] + byte_buf: ByteBuf, + + #[serde(with = "serde_bytes")] + cow_slice: Cow<'a, [u8]>, + + #[serde(with = "serde_bytes")] + cow_bytes: Cow<'a, Bytes>, + + #[serde(with = "serde_bytes")] + boxed_slice: Box<[u8]>, + + #[serde(with = "serde_bytes")] + boxed_bytes: Box<Bytes>, + + #[serde(with = "serde_bytes")] + opt_slice: Option<&'a [u8]>, + + #[serde(with = "serde_bytes")] + opt_vec: Option<Vec<u8>>, + + #[serde(with = "serde_bytes")] + opt_cow_slice: Option<Cow<'a, [u8]>>, +} + +#[derive(Serialize)] +struct Dst { + #[serde(with = "serde_bytes")] + bytes: [u8], +} + +#[test] +fn test() { + let test = Test { + slice: b"...", + vec: b"...".to_vec(), + bytes: Bytes::new(b"..."), + byte_buf: ByteBuf::from(b"...".as_ref()), + cow_slice: Cow::Borrowed(b"..."), + cow_bytes: Cow::Borrowed(Bytes::new(b"...")), + boxed_slice: b"...".to_vec().into_boxed_slice(), + boxed_bytes: ByteBuf::from(b"...".as_ref()).into_boxed_bytes(), + opt_slice: Some(b"..."), + opt_vec: Some(b"...".to_vec()), + opt_cow_slice: Some(Cow::Borrowed(b"...")), + }; + + assert_tokens( + &test, + &[ + Token::Struct { + name: "Test", + len: 11, + }, + Token::Str("slice"), + Token::BorrowedBytes(b"..."), + Token::Str("vec"), + Token::Bytes(b"..."), + Token::Str("bytes"), + Token::BorrowedBytes(b"..."), + Token::Str("byte_buf"), + Token::Bytes(b"..."), + Token::Str("cow_slice"), + Token::BorrowedBytes(b"..."), + Token::Str("cow_bytes"), + Token::BorrowedBytes(b"..."), + Token::Str("boxed_slice"), + Token::Bytes(b"..."), + Token::Str("boxed_bytes"), + Token::Bytes(b"..."), + Token::Str("opt_slice"), + Token::Some, + Token::BorrowedBytes(b"..."), + Token::Str("opt_vec"), + Token::Some, + Token::Bytes(b"..."), + Token::Str("opt_cow_slice"), + Token::Some, + Token::BorrowedBytes(b"..."), + Token::StructEnd, + ], + ); +} diff --git a/third_party/rust/serde_bytes/tests/test_partialeq.rs b/third_party/rust/serde_bytes/tests/test_partialeq.rs new file mode 100644 index 0000000000..a57d194882 --- /dev/null +++ b/third_party/rust/serde_bytes/tests/test_partialeq.rs @@ -0,0 +1,15 @@ +#![allow(clippy::needless_pass_by_value)] + +use serde_bytes::{ByteBuf, Bytes}; + +fn _bytes_eq_slice(bytes: &Bytes, slice: &[u8]) -> bool { + bytes == slice +} + +fn _bytebuf_eq_vec(bytebuf: ByteBuf, vec: Vec<u8>) -> bool { + bytebuf == vec +} + +fn _bytes_eq_bytestring(bytes: &Bytes) -> bool { + bytes == b"..." +} diff --git a/third_party/rust/serde_bytes/tests/test_serde.rs b/third_party/rust/serde_bytes/tests/test_serde.rs new file mode 100644 index 0000000000..d48e3fd434 --- /dev/null +++ b/third_party/rust/serde_bytes/tests/test_serde.rs @@ -0,0 +1,59 @@ +use serde_bytes::{ByteBuf, Bytes}; +use serde_test::{assert_de_tokens, assert_ser_tokens, assert_tokens, Token}; + +#[test] +fn test_bytes() { + let empty = Bytes::new(&[]); + assert_tokens(&empty, &[Token::BorrowedBytes(b"")]); + assert_ser_tokens(&empty, &[Token::Bytes(b"")]); + assert_ser_tokens(&empty, &[Token::ByteBuf(b"")]); + assert_de_tokens(&empty, &[Token::BorrowedStr("")]); + + let buf = vec![65, 66, 67]; + let bytes = Bytes::new(&buf); + assert_tokens(&bytes, &[Token::BorrowedBytes(b"ABC")]); + assert_ser_tokens(&bytes, &[Token::Bytes(b"ABC")]); + assert_ser_tokens(&bytes, &[Token::ByteBuf(b"ABC")]); + assert_de_tokens(&bytes, &[Token::BorrowedStr("ABC")]); +} + +#[test] +fn test_byte_buf() { + let empty = ByteBuf::new(); + assert_tokens(&empty, &[Token::BorrowedBytes(b"")]); + assert_tokens(&empty, &[Token::Bytes(b"")]); + assert_tokens(&empty, &[Token::ByteBuf(b"")]); + assert_de_tokens(&empty, &[Token::BorrowedStr("")]); + assert_de_tokens(&empty, &[Token::Str("")]); + assert_de_tokens(&empty, &[Token::String("")]); + assert_de_tokens(&empty, &[Token::Seq { len: None }, Token::SeqEnd]); + assert_de_tokens(&empty, &[Token::Seq { len: Some(0) }, Token::SeqEnd]); + + let buf = ByteBuf::from(vec![65, 66, 67]); + assert_tokens(&buf, &[Token::BorrowedBytes(b"ABC")]); + assert_tokens(&buf, &[Token::Bytes(b"ABC")]); + assert_tokens(&buf, &[Token::ByteBuf(b"ABC")]); + assert_de_tokens(&buf, &[Token::BorrowedStr("ABC")]); + assert_de_tokens(&buf, &[Token::Str("ABC")]); + assert_de_tokens(&buf, &[Token::String("ABC")]); + assert_de_tokens( + &buf, + &[ + Token::Seq { len: None }, + Token::U8(65), + Token::U8(66), + Token::U8(67), + Token::SeqEnd, + ], + ); + assert_de_tokens( + &buf, + &[ + Token::Seq { len: Some(3) }, + Token::U8(65), + Token::U8(66), + Token::U8(67), + Token::SeqEnd, + ], + ); +} |