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use crate::types::VarInt;
use std::string::FromUtf8Error;
#[derive(Debug)]
pub enum DeserializeErr {
Eof,
VarNumTooLong(Vec<u8>),
NegativeLength(VarInt),
BadStringEncoding(FromUtf8Error),
InvalidBool(u8),
NbtUnknownTagType(u8),
NbtBadLength(isize),
NbtInvalidStartTag(u8),
CannotUnderstandValue(String),
FailedJsonDeserialize(String)
}
impl<'b, R> Into<DeserializeResult<'b, R>> for DeserializeErr {
#[inline]
fn into(self) -> DeserializeResult<'b, R> {
Err(self)
}
}
pub struct Deserialized<'b, R> {
pub value: R,
pub data: &'b [u8],
}
impl<'b, R> Into<DeserializeResult<'b, R>> for Deserialized<'b, R> {
#[inline]
fn into(self) -> DeserializeResult<'b, R> {
Ok(self)
}
}
impl<'b, R> Deserialized<'b, R> {
#[inline]
pub fn create(value: R, data: &'b [u8]) -> Self {
Deserialized {
value,
data,
}
}
#[inline]
pub fn ok(value: R, rest: &'b [u8]) -> DeserializeResult<'b, R> {
Self::create(value, rest).into()
}
#[inline]
pub fn replace<T>(self, other: T) -> Deserialized<'b, T> {
Deserialized{
value: other,
data: self.data,
}
}
#[inline]
pub fn map<F, T>(self, f: F) -> Deserialized<'b, T> where F: FnOnce(R) -> T {
Deserialized{
value: f(self.value),
data: self.data,
}
}
#[inline]
pub fn try_map<F, T>(self, f: F) -> DeserializeResult<'b, T> where
F: FnOnce(R) -> Result<T, DeserializeErr>
{
match f(self.value) {
Ok(new_value) => Ok(Deserialized{
value: new_value,
data: self.data,
}),
Err(err) => Err(err)
}
}
#[inline]
pub fn and_then<F, T>(self, f: F) -> DeserializeResult<'b, T> where
F: FnOnce(R, &'b[u8]) -> DeserializeResult<'b, T>
{
f(self.value, self.data)
}
}
impl<'b, R> From<(R, &'b [u8])> for Deserialized<'b, R> {
fn from(v: (R, &'b [u8])) -> Self {
let (value, data) = v;
Deserialized {
value,
data,
}
}
}
pub type DeserializeResult<'b, R>
= Result<
Deserialized<'b, R>,
DeserializeErr>;
pub trait Deserialize: Sized {
fn mc_deserialize(data: &[u8]) -> DeserializeResult<Self>;
}
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