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#[cfg(all(feature = "alloc", not(feature = "std")))]
use alloc::string::FromUtf8Error;
#[cfg(feature = "std")]
use std::{io, string::FromUtf8Error};
#[derive(Clone, Eq, PartialEq, Debug, Fail)]
pub enum Error {
#[fail(display = "checksum mismatch")]
ChecksumInvalid,
#[fail(display = "bad encoding")]
EncodingInvalid,
#[cfg(feature = "std")]
#[fail(display = "I/O error")]
IoError,
#[fail(display = "invalid length")]
LengthInvalid,
#[fail(display = "padding invalid")]
PaddingInvalid,
#[fail(display = "trailing whitespace")]
TrailingWhitespace,
}
macro_rules! ensure {
($condition:expr, $err:ident) => {
if !($condition) {
Err($err)?;
}
};
}
#[cfg(feature = "std")]
impl From<io::Error> for Error {
fn from(_err: io::Error) -> Error {
Error::IoError
}
}
#[cfg(feature = "alloc")]
impl From<FromUtf8Error> for Error {
fn from(_err: FromUtf8Error) -> Error {
Error::EncodingInvalid
}
}