7cb1ffe100
This commits fixes the flat encoding and decoding (and consequently,
the zigzag) for large integers in the following ways:
- It removes support for encoding and decoding i128 values.
- It optionally (feature = "num-bigint") introduces encoding and
decoding of large sized integers through the num-bigint::BigInt
type.
Without the feature enabled, it is still possible to encode and decode
isize values; but the use of i128 is now prohibited (as it would
overflow on boundaries) in favor of arbitrarily sized integers.
The commit also introduces a missing property roundtrip for encoding
and decoding large integers, which was missing and thus, failed to
identify the overflow problem.
See related issue: https://github.com/aiken-lang/aiken/issues/796
71 lines
1.3 KiB
Rust
71 lines
1.3 KiB
Rust
mod decoder;
|
|
mod error;
|
|
|
|
use crate::flat::filler::Filler;
|
|
|
|
#[cfg(feature = "num-bigint")]
|
|
use num_bigint::BigInt;
|
|
|
|
pub use decoder::Decoder;
|
|
pub use error::Error;
|
|
|
|
pub trait Decode<'b>: Sized {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error>;
|
|
}
|
|
|
|
impl Decode<'_> for Filler {
|
|
fn decode(d: &mut Decoder) -> Result<Filler, Error> {
|
|
d.filler()?;
|
|
|
|
Ok(Filler::FillerEnd)
|
|
}
|
|
}
|
|
|
|
impl Decode<'_> for Vec<u8> {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error> {
|
|
d.bytes()
|
|
}
|
|
}
|
|
|
|
impl Decode<'_> for u8 {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error> {
|
|
d.u8()
|
|
}
|
|
}
|
|
|
|
impl Decode<'_> for isize {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error> {
|
|
d.integer()
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "num-bigint")]
|
|
impl Decode<'_> for BigInt {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error> {
|
|
Ok(d.big_integer()?.into())
|
|
}
|
|
}
|
|
|
|
impl Decode<'_> for usize {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error> {
|
|
d.word()
|
|
}
|
|
}
|
|
|
|
impl Decode<'_> for char {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error> {
|
|
d.char()
|
|
}
|
|
}
|
|
|
|
impl Decode<'_> for String {
|
|
fn decode(d: &mut Decoder) -> Result<Self, Error> {
|
|
d.utf8()
|
|
}
|
|
}
|
|
|
|
impl Decode<'_> for bool {
|
|
fn decode(d: &mut Decoder) -> Result<bool, Error> {
|
|
d.bool()
|
|
}
|
|
}
|