Initial commit
This commit is contained in:
Tadeo Kondrak
commit
3478b85dc3
|
|
@ -0,0 +1,2 @@
|
|||
/target
|
||||
Cargo.lock
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
[package]
|
||||
name = "serde_bare"
|
||||
version = "0.1.0"
|
||||
authors = ["Tadeo Kondrak <me@tadeo.ca>"]
|
||||
license = "MIT OR Apache-2.0"
|
||||
edition = "2018"
|
||||
description = "An incomplete implementation of the BARE (https://git.sr.ht/~sircmpwn/bare) encoding format."
|
||||
repository = "https://git.sr.ht/~tdeo/serde_bare"
|
||||
keywords = ["serde", "bare"]
|
||||
categories = ["encoding"]
|
||||
|
||||
[dependencies]
|
||||
serde = "1.0"
|
||||
|
|
@ -0,0 +1,201 @@
|
|||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
||||
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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Permission is hereby granted, free of charge, to any
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@ -0,0 +1,15 @@
|
|||
serde_bare
|
||||
|
||||
An incomplete implementation of the BARE (https://git.sr.ht/~sircmpwn/bare) encoding format.
|
||||
|
||||
Missing types:
|
||||
- f16 (in BARE, not in Serde's data model)
|
||||
- i128 (in Serde's data model, not in BARE)
|
||||
- u128 (in Serde's data model, not in BARE)
|
||||
- tagged unions (in BARE, not immediately clear how to integrate with Serde's data model)
|
||||
|
||||
Licensed under either of Apache License, Version 2.0 or MIT license at your option.
|
||||
|
||||
Unless you explicitly state otherwise, any contribution intentionally submitted
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||||
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
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be dual licensed as above, without any additional terms or conditions.
|
||||
|
|
@ -0,0 +1,515 @@
|
|||
use crate::error::Error;
|
||||
use serde::de;
|
||||
use std::{
|
||||
i16, i32, i64, i8,
|
||||
io::{Cursor, Read},
|
||||
str, u16, u32, u64, u8,
|
||||
};
|
||||
|
||||
pub struct Deserializer<R> {
|
||||
reader: R,
|
||||
}
|
||||
|
||||
impl<R> Deserializer<R> {
|
||||
pub fn new(reader: R) -> Self {
|
||||
Deserializer { reader }
|
||||
}
|
||||
}
|
||||
|
||||
impl<'de, 'a, R> de::Deserializer<'de> for &'a mut Deserializer<R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
|
||||
/// Returns Error::AnyUnsupported.
|
||||
fn deserialize_any<V>(self, _visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
Err(Error::AnyUnsupported)
|
||||
}
|
||||
|
||||
/// BARE type: bool
|
||||
fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
self.deserialize_u8(visitor)
|
||||
}
|
||||
|
||||
/// BARE type: i8
|
||||
fn deserialize_i8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 1];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_i8(i8::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: i16
|
||||
fn deserialize_i16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 2];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_i16(i16::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: i32
|
||||
fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_i32(i32::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: i64
|
||||
fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 8];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_i64(i64::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: u8
|
||||
fn deserialize_u8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 1];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_u8(u8::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: u16
|
||||
fn deserialize_u16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 2];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_u16(u16::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: u32
|
||||
fn deserialize_u32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_u32(u32::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: u64
|
||||
fn deserialize_u64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 8];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_u64(u64::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: f32
|
||||
fn deserialize_f32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_f32(f32::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: f64
|
||||
fn deserialize_f64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let mut buf = [0u8; 8];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_f64(f64::from_le_bytes(buf))
|
||||
}
|
||||
|
||||
/// BARE type: u32
|
||||
fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
self.deserialize_u32(visitor)
|
||||
}
|
||||
|
||||
/// BARE type: string
|
||||
fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let length = {
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
u32::from_le_bytes(buf) as usize
|
||||
};
|
||||
let mut buf = Vec::with_capacity(length);
|
||||
buf.resize(length, 0);
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
let utf8 = str::from_utf8(&buf).map_err(|_| Error::InvalidUtf8)?;
|
||||
visitor.visit_str(utf8)
|
||||
}
|
||||
|
||||
/// BARE type: string
|
||||
fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let length = {
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
u32::from_le_bytes(buf) as usize
|
||||
};
|
||||
let mut buf = Vec::with_capacity(length);
|
||||
buf.resize(length, 0);
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
let utf8 = String::from_utf8(buf).map_err(|_| Error::InvalidUtf8)?;
|
||||
visitor.visit_string(utf8)
|
||||
}
|
||||
|
||||
/// BARE type: data
|
||||
fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let length = {
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
u32::from_le_bytes(buf) as usize
|
||||
};
|
||||
let mut buf = Vec::with_capacity(length);
|
||||
buf.resize(length, 0);
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_bytes(&buf)
|
||||
}
|
||||
|
||||
/// BARE type: data
|
||||
fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let length = {
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
u32::from_le_bytes(buf) as usize
|
||||
};
|
||||
let mut buf = Vec::with_capacity(length);
|
||||
buf.resize(length, 0);
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
visitor.visit_byte_buf(buf)
|
||||
}
|
||||
|
||||
/// BARE type: optional<T>
|
||||
fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let is_present = {
|
||||
let mut buf = [0u8; 1];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
match buf[0] {
|
||||
0 => false,
|
||||
1 => true,
|
||||
_ => return Err(Error::InvalidBool),
|
||||
}
|
||||
};
|
||||
if !is_present {
|
||||
visitor.visit_none()
|
||||
} else {
|
||||
visitor.visit_some(self)
|
||||
}
|
||||
}
|
||||
|
||||
/// Unserialized type.
|
||||
fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
visitor.visit_unit()
|
||||
}
|
||||
|
||||
/// Unserialized type.
|
||||
fn deserialize_unit_struct<V>(
|
||||
self,
|
||||
_name: &'static str,
|
||||
visitor: V,
|
||||
) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
visitor.visit_unit()
|
||||
}
|
||||
|
||||
/// Unserialized type.
|
||||
fn deserialize_newtype_struct<V>(
|
||||
self,
|
||||
_name: &'static str,
|
||||
visitor: V,
|
||||
) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
visitor.visit_newtype_struct(self)
|
||||
}
|
||||
|
||||
/// BARE type: []T
|
||||
fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let length = {
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
u32::from_le_bytes(buf)
|
||||
};
|
||||
struct Seq<'a, R>(&'a mut Deserializer<R>, u32);
|
||||
impl<'de, 'a, R> de::SeqAccess<'de> for Seq<'a, R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
|
||||
fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
|
||||
where
|
||||
T: de::DeserializeSeed<'de>,
|
||||
{
|
||||
if self.1 == 0 {
|
||||
Ok(None)
|
||||
} else {
|
||||
self.1 -= 1;
|
||||
Ok(Some(seed.deserialize(&mut *self.0)?))
|
||||
}
|
||||
}
|
||||
}
|
||||
visitor.visit_seq(Seq::<'a, R>(self, length))
|
||||
}
|
||||
|
||||
/// BARE type: \[len\]T
|
||||
fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
struct Seq<'a, R>(&'a mut Deserializer<R>);
|
||||
impl<'de, 'a, R> de::SeqAccess<'de> for Seq<'a, R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
|
||||
fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
|
||||
where
|
||||
T: de::DeserializeSeed<'de>,
|
||||
{
|
||||
Ok(Some(seed.deserialize(&mut *self.0)?))
|
||||
}
|
||||
}
|
||||
visitor.visit_seq(Seq::<'a, R>(self))
|
||||
}
|
||||
|
||||
/// BARE type: struct
|
||||
fn deserialize_tuple_struct<V>(
|
||||
self,
|
||||
_name: &'static str,
|
||||
_len: usize,
|
||||
visitor: V,
|
||||
) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
struct Seq<'a, R>(&'a mut Deserializer<R>);
|
||||
impl<'de, 'a, R> de::SeqAccess<'de> for Seq<'a, R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
|
||||
fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
|
||||
where
|
||||
T: de::DeserializeSeed<'de>,
|
||||
{
|
||||
Ok(Some(seed.deserialize(&mut *self.0)?))
|
||||
}
|
||||
}
|
||||
visitor.visit_seq(Seq::<'a, R>(self))
|
||||
}
|
||||
|
||||
/// BARE type: map\[T\]U
|
||||
fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
let length = {
|
||||
let mut buf = [0u8; 4];
|
||||
self.reader.read_exact(&mut buf).map_err(|e| Error::Io(e))?;
|
||||
u32::from_le_bytes(buf)
|
||||
};
|
||||
|
||||
struct Map<'a, R>(&'a mut Deserializer<R>, u32);
|
||||
impl<'de, 'a, R> de::MapAccess<'de> for Map<'a, R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
|
||||
fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Self::Error>
|
||||
where
|
||||
K: de::DeserializeSeed<'de>,
|
||||
{
|
||||
if self.1 == 0 {
|
||||
Ok(None)
|
||||
} else {
|
||||
Ok(Some(seed.deserialize(&mut *self.0)?))
|
||||
}
|
||||
}
|
||||
|
||||
fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::DeserializeSeed<'de>,
|
||||
{
|
||||
self.1 -= 1;
|
||||
Ok(seed.deserialize(&mut *self.0)?)
|
||||
}
|
||||
}
|
||||
visitor.visit_map(Map::<'a, R>(self, length))
|
||||
}
|
||||
|
||||
/// BARE type: struct
|
||||
fn deserialize_struct<V>(
|
||||
self,
|
||||
_name: &'static str,
|
||||
_fields: &'static [&'static str],
|
||||
visitor: V,
|
||||
) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
struct Seq<'a, R>(&'a mut Deserializer<R>);
|
||||
impl<'de, 'a, R> de::SeqAccess<'de> for Seq<'a, R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
|
||||
where
|
||||
T: de::DeserializeSeed<'de>,
|
||||
{
|
||||
Ok(Some(seed.deserialize(&mut *self.0)?))
|
||||
}
|
||||
}
|
||||
visitor.visit_seq(Seq::<'a, R>(self))
|
||||
}
|
||||
|
||||
fn deserialize_enum<V>(
|
||||
self,
|
||||
_name: &'static str,
|
||||
_variants: &'static [&'static str],
|
||||
visitor: V,
|
||||
) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
struct Enum<'a, R>(&'a mut Deserializer<R>);
|
||||
impl<'de, 'a, R> de::EnumAccess<'de> for Enum<'a, R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
type Variant = Variant<'a, R>;
|
||||
|
||||
fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
|
||||
where
|
||||
V: de::DeserializeSeed<'de>,
|
||||
{
|
||||
let val = seed.deserialize(&mut *self.0)?;
|
||||
Ok((val, Variant(self.0)))
|
||||
}
|
||||
}
|
||||
struct Variant<'a, R>(&'a mut Deserializer<R>);
|
||||
impl<'de, 'a, R> de::VariantAccess<'de> for Variant<'a, R>
|
||||
where
|
||||
R: Read,
|
||||
{
|
||||
type Error = Error;
|
||||
|
||||
fn unit_variant(self) -> Result<(), Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Self::Error>
|
||||
where
|
||||
T: de::DeserializeSeed<'de>,
|
||||
{
|
||||
seed.deserialize(self.0)
|
||||
}
|
||||
|
||||
fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
de::Deserializer::deserialize_tuple(self.0, len, visitor)
|
||||
}
|
||||
|
||||
fn struct_variant<V>(
|
||||
self,
|
||||
fields: &'static [&'static str],
|
||||
visitor: V,
|
||||
) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
de::Deserializer::deserialize_struct(self.0, "", fields, visitor)
|
||||
}
|
||||
}
|
||||
visitor.visit_enum(Enum::<'a, R>(self))
|
||||
}
|
||||
|
||||
/// Returns Error::IdentifierUnsupported.
|
||||
fn deserialize_identifier<V>(self, _visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
Err(Error::IdentifierUnsupported)
|
||||
}
|
||||
|
||||
/// Returns Error::AnyUnsupported.
|
||||
fn deserialize_ignored_any<V>(self, _visitor: V) -> Result<V::Value, Self::Error>
|
||||
where
|
||||
V: de::Visitor<'de>,
|
||||
{
|
||||
Err(Error::AnyUnsupported)
|
||||
}
|
||||
|
||||
fn is_human_readable(&self) -> bool {
|
||||
false
|
||||
}
|
||||
}
|
||||
|
||||
pub fn from_reader<R, T>(reader: R) -> Result<T, Error>
|
||||
where
|
||||
R: Read,
|
||||
T: de::DeserializeOwned,
|
||||
{
|
||||
T::deserialize(&mut Deserializer { reader })
|
||||
}
|
||||
|
||||
pub fn from_slice<T>(slice: &[u8]) -> Result<T, Error>
|
||||
where
|
||||
T: de::DeserializeOwned,
|
||||
{
|
||||
T::deserialize(&mut Deserializer {
|
||||
reader: Cursor::new(slice),
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
use serde::{de, ser};
|
||||
use std::{
|
||||
fmt::{self, Display},
|
||||
io,
|
||||
};
|
||||
|
||||
pub type Result<T> = std::result::Result<T, Error>;
|
||||
|
||||
#[derive(Debug)]
|
||||
pub enum Error {
|
||||
Message(String),
|
||||
Io(io::Error),
|
||||
AnyUnsupported,
|
||||
InvalidUtf8,
|
||||
InvalidBool,
|
||||
IdentifierUnsupported,
|
||||
LengthOverflow,
|
||||
MapLengthRequired,
|
||||
}
|
||||
|
||||
impl ser::Error for Error {
|
||||
fn custom<T: Display>(msg: T) -> Self {
|
||||
Error::Message(msg.to_string())
|
||||
}
|
||||
}
|
||||
|
||||
impl de::Error for Error {
|
||||
fn custom<T: Display>(msg: T) -> Self {
|
||||
Error::Message(msg.to_string())
|
||||
}
|
||||
}
|
||||
|
||||
impl Display for Error {
|
||||
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
|
||||
match self {
|
||||
Error::Message(msg) => formatter.write_str(msg),
|
||||
Error::Io(e) => e.fmt(formatter),
|
||||
Error::AnyUnsupported => {
|
||||
formatter.write_str("any is unsupported because BARE is not self-describing")
|
||||
}
|
||||
Error::InvalidUtf8 => formatter.write_str("invalid utf-8 in string"),
|
||||
Error::InvalidBool => formatter.write_str("invalid bool, neither 0 or 1"),
|
||||
Error::IdentifierUnsupported => formatter.write_str("identifier is not supported"),
|
||||
Error::LengthOverflow => formatter.write_str("length above u32::MAX"),
|
||||
Error::MapLengthRequired => formatter.write_str("map length required"),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl std::error::Error for Error {}
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
#![forbid(unsafe_code)]
|
||||
//!```text
|
||||
//! serde_bare
|
||||
//!
|
||||
//! An incomplete implementation of the BARE (https://git.sr.ht/~sircmpwn/bare) encoding format.
|
||||
//!
|
||||
//! Missing types:
|
||||
//! - f16 (in BARE, not in Serde's data model)
|
||||
//! - i128 (in Serde's data model, not in BARE)
|
||||
//! - u128 (in Serde's data model, not in BARE)
|
||||
//! - tagged unions (in BARE, not immediately clear how to integrate with Serde's data model)
|
||||
//!```
|
||||
|
||||
pub mod de;
|
||||
pub mod error;
|
||||
pub mod ser;
|
||||
|
||||
#[doc(inline)]
|
||||
pub use de::{from_reader, from_slice, Deserializer};
|
||||
#[doc(inline)]
|
||||
pub use error::{Error, Result};
|
||||
#[doc(inline)]
|
||||
pub use ser::{to_vec, to_writer, Serializer};
|
||||
|
|
@ -0,0 +1,442 @@
|
|||
use crate::error::Error;
|
||||
use serde::{ser, Serialize};
|
||||
use std::{convert::TryInto, io::Write};
|
||||
|
||||
pub struct Serializer<W> {
|
||||
writer: W,
|
||||
}
|
||||
|
||||
impl<W> Serializer<W> {
|
||||
pub fn new(writer: W) -> Self {
|
||||
Serializer { writer }
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::Serializer for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
type SerializeSeq = Self;
|
||||
type SerializeTuple = Self;
|
||||
type SerializeTupleStruct = Self;
|
||||
type SerializeTupleVariant = Self;
|
||||
type SerializeMap = Self;
|
||||
type SerializeStruct = Self;
|
||||
type SerializeStructVariant = Self;
|
||||
|
||||
/// BARE type: bool
|
||||
fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
|
||||
self.serialize_u8(v as u8)
|
||||
}
|
||||
|
||||
/// BARE type: i8
|
||||
fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: i16
|
||||
fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: i32
|
||||
fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: i64
|
||||
fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: u8
|
||||
fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: u16
|
||||
fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: u32
|
||||
fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: u64
|
||||
fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: f32
|
||||
fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: f64
|
||||
fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
|
||||
self.writer
|
||||
.write_all(&v.to_le_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: u32
|
||||
fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
|
||||
self.serialize_u32(v as u32)
|
||||
}
|
||||
|
||||
/// BARE type: string
|
||||
/// Restriction: len < u32::MAX
|
||||
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
|
||||
let len: u32 = v.len().try_into().map_err(|_| Error::LengthOverflow)?;
|
||||
self.serialize_u32(len)?;
|
||||
self.writer
|
||||
.write_all(v.as_bytes())
|
||||
.map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: data
|
||||
/// Restriction: len < u32::MAX
|
||||
fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error> {
|
||||
let len: u32 = v.len().try_into().map_err(|_| Error::LengthOverflow)?;
|
||||
self.serialize_u32(len)?;
|
||||
self.writer.write_all(v).map_err(|e| Error::Io(e))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// BARE type: optional<T>
|
||||
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
|
||||
self.serialize_u8(0)
|
||||
}
|
||||
|
||||
/// BARE type: optional<T>
|
||||
fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
self.serialize_u8(1)?;
|
||||
value.serialize(self)
|
||||
}
|
||||
|
||||
/// No-op.
|
||||
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// No-op.
|
||||
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
|
||||
self.serialize_unit()
|
||||
}
|
||||
|
||||
/// BARE type: u32
|
||||
fn serialize_unit_variant(
|
||||
self,
|
||||
_name: &'static str,
|
||||
variant_index: u32,
|
||||
_variant: &'static str,
|
||||
) -> Result<Self::Ok, Self::Error> {
|
||||
self.serialize_u32(variant_index)
|
||||
}
|
||||
|
||||
/// BARE type: T
|
||||
fn serialize_newtype_struct<T: ?Sized>(
|
||||
self,
|
||||
_name: &'static str,
|
||||
value: &T,
|
||||
) -> Result<Self::Ok, Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(self)
|
||||
}
|
||||
|
||||
/// BARE type: { u32, T }
|
||||
fn serialize_newtype_variant<T: ?Sized>(
|
||||
self,
|
||||
_name: &'static str,
|
||||
variant_index: u32,
|
||||
_variant: &'static str,
|
||||
value: &T,
|
||||
) -> Result<Self::Ok, Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
self.serialize_u32(variant_index)?;
|
||||
value.serialize(self)
|
||||
}
|
||||
|
||||
/// BARE type if len is None: []type
|
||||
/// BARE type if len is Some: \[len\]type
|
||||
/// Error::LengthOverflow if len > u32::MAX
|
||||
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
|
||||
if let Some(len) = len {
|
||||
self.serialize_u32(len.try_into().map_err(|_| Error::LengthOverflow)?)?;
|
||||
}
|
||||
Ok(self)
|
||||
}
|
||||
|
||||
/// BARE type: \[len\]type
|
||||
/// Error::LengthOverflow if len > u32::MAX
|
||||
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
|
||||
Ok(self)
|
||||
}
|
||||
|
||||
/// BARE type: struct
|
||||
fn serialize_tuple_struct(
|
||||
self,
|
||||
_name: &'static str,
|
||||
_len: usize,
|
||||
) -> Result<Self::SerializeTupleStruct, Self::Error> {
|
||||
Ok(self)
|
||||
}
|
||||
|
||||
/// BARE type: { u32, struct }
|
||||
fn serialize_tuple_variant(
|
||||
self,
|
||||
_name: &'static str,
|
||||
variant_index: u32,
|
||||
_variant: &'static str,
|
||||
_len: usize,
|
||||
) -> Result<Self::SerializeTupleVariant, Self::Error> {
|
||||
self.serialize_u32(variant_index)?;
|
||||
Ok(self)
|
||||
}
|
||||
|
||||
/// BARE type: map\[T\]U
|
||||
/// Error::MapLengthRequired if len is None
|
||||
/// Error::LengthOverflow if len > u32::MAX
|
||||
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
|
||||
self.serialize_u32(
|
||||
len.ok_or(Error::MapLengthRequired)?
|
||||
.try_into()
|
||||
.map_err(|_| Error::LengthOverflow)?,
|
||||
)?;
|
||||
Ok(self)
|
||||
}
|
||||
|
||||
/// BARE type: struct
|
||||
fn serialize_struct(
|
||||
self,
|
||||
_name: &'static str,
|
||||
_len: usize,
|
||||
) -> Result<Self::SerializeStruct, Self::Error> {
|
||||
Ok(self)
|
||||
}
|
||||
|
||||
/// BARE type: { u32, struct }
|
||||
fn serialize_struct_variant(
|
||||
self,
|
||||
_name: &'static str,
|
||||
variant_index: u32,
|
||||
_variant: &'static str,
|
||||
_len: usize,
|
||||
) -> Result<Self::SerializeStructVariant, Self::Error> {
|
||||
self.serialize_u32(variant_index)?;
|
||||
Ok(self)
|
||||
}
|
||||
|
||||
/// Returns false.
|
||||
fn is_human_readable(&self) -> bool {
|
||||
false
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::SerializeSeq for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
|
||||
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn end(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::SerializeTuple for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
|
||||
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn end(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::SerializeTupleStruct for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
|
||||
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn end(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::SerializeTupleVariant for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
|
||||
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn end(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::SerializeMap for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
|
||||
fn serialize_key<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn end(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::SerializeStruct for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
|
||||
fn serialize_field<T: ?Sized>(
|
||||
&mut self,
|
||||
_key: &'static str,
|
||||
value: &T,
|
||||
) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn end(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, W> ser::SerializeStructVariant for &'a mut Serializer<W>
|
||||
where
|
||||
W: Write,
|
||||
{
|
||||
type Ok = ();
|
||||
type Error = Error;
|
||||
|
||||
fn serialize_field<T: ?Sized>(
|
||||
&mut self,
|
||||
_key: &'static str,
|
||||
value: &T,
|
||||
) -> Result<(), Self::Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
value.serialize(&mut **self)
|
||||
}
|
||||
|
||||
fn end(self) -> Result<Self::Ok, Self::Error> {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
pub fn to_vec<T: ?Sized>(value: &T) -> Result<Vec<u8>, Error>
|
||||
where
|
||||
T: Serialize,
|
||||
{
|
||||
let mut vec = Vec::new();
|
||||
let mut serializer = Serializer { writer: &mut vec };
|
||||
value.serialize(&mut serializer)?;
|
||||
Ok(vec)
|
||||
}
|
||||
|
||||
pub fn to_writer<W, T: ?Sized>(writer: W, value: &T) -> Result<(), Error>
|
||||
where
|
||||
W: Write,
|
||||
T: Serialize,
|
||||
{
|
||||
let mut serializer = Serializer { writer };
|
||||
value.serialize(&mut serializer)?;
|
||||
Ok(())
|
||||
}
|
||||
Loading…
Reference in New Issue