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Nicolas Stalder
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.gitignore
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/target
Cargo.lock
Cargo.toml
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[package]
name = "cbor-smol"
version = "0.1.0"
authors = ["Nicolas Stalder <n@stalder.io>"]
edition = "2018"
description = "Streamlined serde serializer/deserializer for CBOR"
repository = "https://github.com/nickray/cbor-smol"
readme = "README.md"
license = "Apache-2.0 OR MIT"
documentation = "https://docs.rs/cbor-smol"
keywords = ["CBOR", "serde"]
categories = ["development-tools", "embedded"]
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
delog = "0.1.0-alpha.3"
heapless-bytes = "0.1.0"
serde = { version = "1.0", default-features = false } #, features = ["derive"] }
LICENSE-APACHE
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LICENSE-MIT
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Copyright (c) 2020 SoloKeys
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README.md
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# cbor-smol
[<img alt="github" src="https://img.shields.io/badge/github-cbor%2Fsmol-8da0cb?style=for-the-badge&labelColor=555555&logo=github" height="20">](https://github.com/nickray/cbor-smol)
[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-cbor%2Fsmol-66c2a5?style=for-the-badge&labelColor=555555&logoColor=white&logo=data:image/svg+xml;base64,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" height="20">](https://docs.rs/cbor-smol)
[<img alt="main" src="https://img.shields.io/badge/main-cbor%2Fsmol-66c2a5?style=for-the-badge&labelColor=555555&logoColor=white&logo=data:image/svg+xml;base64,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" height="20">](https://nickray.github.io/cbor-smol/cbor-smol/index.html)
[<img alt="build status" src="https://img.shields.io/github/workflow/status/nickray/cbor-smol/CI/main?style=for-the-badge" height="20">](https://github.com/nickray/cbor-smol/actions?query=branch%3Amain)
#### 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>
src/de.rs
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src/error.rs
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#![allow(unused_variables)]
use core::fmt::{Display, Formatter};
/// This is the Result type used by cbor-smol.
pub type Result<T> = core::result::Result<T, Error>;
/// This is the error type used by cbor-smol
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
#[repr(u8)]
pub enum Error {
/// This is a feature that cbor-smol will never implement
WontImplement,
/// This is a feature that cbor-smol intends to support, but does not yet
NotYetImplemented,
/// The serialize buffer is full
SerializeBufferFull(usize),
// /// The length of a sequence must be known
// SerializeSeqLengthUnknown,
/// Hit the end of buffer, expected more data
DeserializeUnexpectedEnd,
// /// Found a varint that didn't terminate. Is the usize too big for this platform?
// DeserializeBadVarint,
/// Found a bool that wasn't 0xf4 or 0xf5
DeserializeBadBool,
// /// Found an invalid unicode char
// DeserializeBadChar,
/// Tried to parse invalid utf-8
DeserializeBadUtf8,
// /// Found an Option discriminant that wasn't 0 or 1
// DeserializeBadOption,
// /// Found an enum discriminant that was > u32::max_value()
/// Could not parse an enum
DeserializeBadEnum,
// /// The original data was not well encoded
// DeserializeBadEncoding,
/// Expected a different major type
DeserializeBadMajor,
/// Expected a i8, was too large
DeserializeBadI8,
/// Expected a i16, was too large
DeserializeBadI16,
/// Expected a i32, was too large
DeserializeBadI32,
/// Expected a u8
DeserializeBadU8,
/// Expected a u16
DeserializeBadU16,
/// Expected a u32
DeserializeBadU32,
/// Expected a NULL marker
DeserializeExpectedNull,
/// Inexistent slice-to-array cast error. Used here to avoid calling unwrap.
InexistentSliceToArrayError,
/// Value may be valid, but not encoded in minimal way
DeserializeNonMinimal,
/// Serde Serialization Error
SerdeSerCustom,
/// Serde Deserialization Error
SerdeDeCustom,
/// Serde Missing required value
SerdeMissingField,
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter) -> core::fmt::Result {
use Error::*;
write!(
f,
"{}",
match self {
WontImplement => "This is a feature that cbor-smol will never implement",
NotYetImplemented => {
"This is a feature that cbor-smol intends to support, but does not yet"
}
SerializeBufferFull(i) => "The serialize buffer is full",
// SerializeSeqLengthUnknown => "The length of a sequence must be known",
DeserializeUnexpectedEnd => "Hit the end of buffer, expected more data",
// DeserializeBadVarint => {
// "Found a varint that didn't terminate. Is the usize too big for this platform?"
// }
DeserializeBadBool => "Found a bool that wasn't 0xf4 or 0xf5",
// DeserializeBadChar => "Found an invalid unicode char",
DeserializeBadUtf8 => "Tried to parse invalid utf-8",
// DeserializeBadOption => "Found an Option discriminant that wasn't 0 or 1",
// DeserializeBadEnum => "Found an enum discriminant that was > u32::max_value()",
DeserializeBadEnum => "Could not parse an enum",
// DeserializeBadEncoding => "The original data was not well encoded",
DeserializeBadI8 => "Expected a i8",
DeserializeBadI16 => "Expected a i16",
DeserializeBadI32 => "Expected a i32",
DeserializeBadMajor => "Expected a different major type",
DeserializeBadU8 => "Expected a u8",
DeserializeBadU16 => "Expected a u16",
DeserializeBadU32 => "Expected a u32",
DeserializeExpectedNull => "Expected 0xf6",
InexistentSliceToArrayError => "",
DeserializeNonMinimal => "Value may be valid, but not encoded in minimal way",
SerdeSerCustom => "Serde Serialization Error",
SerdeDeCustom => "Serde Deserialization Error",
SerdeMissingField => "Serde Missing Required Field"
}
)
}
}
impl serde::ser::Error for Error {
fn custom<T>(_msg: T) -> Self
where
T: Display,
{
Error::SerdeSerCustom
}
}
impl serde::de::Error for Error {
fn custom<T>(msg: T) -> Self
where
T: Display,
{
// TODO: Would be helpful to log this to system logger
// This shows e.g.
// - missing fields
// - expected sequence, received X
// - etc.
//
// Particularly helpful would be better errors when receiving
// structures are undersized.
//
// E.g. if there is a `ByteBuf<N>` and more than N bytes are delivered,
// currently the error _msg: T is:
//
// `invalid length 297, expected a sequence`
//
info_now!("deser error: {}",&msg);
Error::SerdeDeCustom
}
fn missing_field(field: &'static str) -> Self {
info_now!("deser missing: {}", field);
Error::SerdeMissingField
}
}
impl serde::ser::StdError for Error {}
src/lib.rs
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#![cfg_attr(not(test), no_std)]
#[macro_use]
extern crate delog;
generate_macros!();
pub use heapless_bytes::{ArrayLength, Bytes as ByteBuf};
pub mod de;
pub mod ser;
pub mod error;
pub use error::{Error, Result};
// pub use de::from_bytes;
// pub use de::take_from_bytes;
// kudos to postcard, this is much nicer than returning size
pub fn cbor_serialize<'a, 'b, T: serde::Serialize>(
object: &'a T,
buffer: &'b mut [u8],
) -> Result<&'b [u8]> {
let writer = ser::SliceWriter::new(buffer);
let mut ser = ser::Serializer::new(writer);
object.serialize(&mut ser)?;
let writer = ser.into_inner();
let size = writer.bytes_written();
Ok(&buffer[..size])
}
pub fn cbor_serialize_bytes<'a, 'b, N: ArrayLength<u8>, T: serde::Serialize>(
object: &'a T,
bytes: &'b mut ByteBuf<N>,
) -> Result<usize> {
let len_before = bytes.len();
let mut ser = ser::Serializer::new(bytes);
object.serialize(&mut ser)?;
Ok(ser.into_inner().len() - len_before)
}
pub fn cbor_serialize_bytebuf<N: ArrayLength<u8>, T: serde::Serialize>(object: &T) -> Result<ByteBuf<N>> {
let mut data = ByteBuf::<N>::new();
cbor_serialize_bytes(object, &mut data)?;
Ok(data)
}
pub fn cbor_deserialize<'de, T: serde::Deserialize<'de>>(
buffer: &'de [u8],
) -> Result<T> {
// cortex_m_semihosting::hprintln!("deserializing {:?}", buffer).ok();
de::from_bytes(buffer)
}
src/ser.rs
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