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pub mod bytes;
pub mod number;
use std::io::{self, ErrorKind};
use error_code::{self, ErrorCode, ErrorCodeExt};
use thiserror::Error;
pub type BytesSlice<'a> = &'a [u8];
#[inline]
pub fn read_slice<'a>(data: &mut BytesSlice<'a>, size: usize) -> Result<BytesSlice<'a>> {
if data.len() >= size {
let buf = &data[0..size];
*data = &data[size..];
Ok(buf)
} else {
Err(Error::unexpected_eof())
}
}
#[derive(Debug, Error)]
pub enum Error {
#[error("{0}")]
Io(#[from] io::Error),
#[error("bad format key(length)")]
KeyLength,
#[error("bad format key(padding)")]
KeyPadding,
#[error("key not found")]
KeyNotFound,
#[error("bad format value(length)")]
ValueLength,
}
impl Error {
pub fn maybe_clone(&self) -> Option<Error> {
match *self {
Error::KeyLength => Some(Error::KeyLength),
Error::KeyPadding => Some(Error::KeyPadding),
Error::KeyNotFound => Some(Error::KeyNotFound),
Error::ValueLength => Some(Error::ValueLength),
Error::Io(_) => None,
}
}
pub fn unexpected_eof() -> Error {
Error::Io(io::Error::new(ErrorKind::UnexpectedEof, "eof"))
}
}
pub type Result<T> = std::result::Result<T, Error>;
impl ErrorCodeExt for Error {
fn error_code(&self) -> ErrorCode {
match self {
Error::Io(_) => error_code::codec::IO,
Error::KeyLength => error_code::codec::KEY_LENGTH,
Error::KeyPadding => error_code::codec::BAD_PADDING,
Error::KeyNotFound => error_code::codec::KEY_NOT_FOUND,
Error::ValueLength => error_code::codec::VALUE_LENGTH,
}
}
}