ipld-nostd 0.2.1

A bundle of CID, IPLD, CAR, Multihash and serde serialization for [no_std]
Documentation 
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//! This module contains code that was just copied from cbor4ii.
//!
//! Some things needed for the Serde implementation are not public in the
//! cbor4ii crate. Those are copied into this file.

use {super::error::DecodeError, cbor4ii::core::dec};

// Copy from cbor4ii/core.rs.
#[allow(dead_code)]
pub(crate) mod marker {
	pub const START: u8 = 0x1f;
	pub const FALSE: u8 = 0xf4; // simple(20)
	pub const TRUE: u8 = 0xf5; // simple(21)
	pub const NULL: u8 = 0xf6; // simple(22)
	pub const UNDEFINED: u8 = 0xf7; // simple(23)
	pub const F16: u8 = 0xf9;
	pub const F32: u8 = 0xfa;
	pub const F64: u8 = 0xfb;
	pub const BREAK: u8 = 0xff;
}

// Copy from cbor4ii/core/dec.rs.
#[inline]
pub(crate) fn peek_one<'a, R: dec::Read<'a>>(
	reader: &mut R,
) -> Result<u8, DecodeError<R::Error>> {
	let buf = match reader.fill(1)? {
		dec::Reference::Long(buf) => buf,
		dec::Reference::Short(buf) => buf,
	};
	let byte = buf.first().copied().ok_or(DecodeError::Eof)?;
	Ok(byte)
}

// Copy from cbor4ii/core/dec.rs.
#[inline]
pub(crate) fn pull_one<'a, R: dec::Read<'a>>(
	reader: &mut R,
) -> Result<u8, DecodeError<R::Error>> {
	let byte = peek_one(reader)?;
	reader.advance(1);
	Ok(byte)
}