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#![no_std]
#![cfg_attr(docsrs, feature(doc_cfg))]
#![doc = include_str!("../README.md")]
#[cfg_attr(feature = "std", macro_use)]
extern crate alloc;
#[cfg(feature = "std")]
extern crate std;
use alloc::string::String;
use core::fmt::{self, Display};
#[cfg(feature = "std")]
use {
alloc::vec::Vec,
std::io::{Read, Write},
};
mod arrays;
mod primitives;
mod tls_vec;
pub use tls_vec::{
SecretTlsVecU16, SecretTlsVecU32, SecretTlsVecU8, TlsByteSliceU16, TlsByteSliceU32,
TlsByteSliceU8, TlsByteVecU16, TlsByteVecU32, TlsByteVecU8, TlsSliceU16, TlsSliceU32,
TlsSliceU8, TlsVecU16, TlsVecU32, TlsVecU8,
};
#[cfg(feature = "derive")]
pub use tls_codec_derive::{TlsDeserialize, TlsSerialize, TlsSize};
#[derive(Debug, PartialEq, Clone)]
pub enum Error {
EncodingError(String),
InvalidVectorLength,
InvalidWriteLength(String),
InvalidInput,
DecodingError(String),
EndOfStream,
}
#[cfg(feature = "std")]
impl std::error::Error for Error {}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_fmt(format_args!("{:?}", self))
}
}
#[cfg(feature = "std")]
#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
impl From<std::io::Error> for Error {
fn from(e: std::io::Error) -> Self {
match e.kind() {
std::io::ErrorKind::UnexpectedEof => Self::EndOfStream,
_ => Self::DecodingError(format!("io error: {:?}", e)),
}
}
}
pub trait Size {
fn tls_serialized_len(&self) -> usize;
}
pub trait Serialize: Size {
#[cfg(feature = "std")]
#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
fn tls_serialize<W: Write>(&self, writer: &mut W) -> Result<usize, Error>;
#[cfg(feature = "std")]
#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
fn tls_serialize_detached(&self) -> Result<Vec<u8>, Error> {
let mut buffer = Vec::with_capacity(self.tls_serialized_len());
let written = self.tls_serialize(&mut buffer)?;
debug_assert_eq!(
written,
buffer.len(),
"Expected that {} bytes were written but the output holds {} bytes",
written,
buffer.len()
);
if written != buffer.len() {
Err(Error::EncodingError(format!(
"Expected that {} bytes were written but the output holds {} bytes",
written,
buffer.len()
)))
} else {
Ok(buffer)
}
}
}
pub trait Deserialize: Size {
#[cfg(feature = "std")]
#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
fn tls_deserialize<R: Read>(bytes: &mut R) -> Result<Self, Error>
where
Self: Sized;
}