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use crate::private::{LabelMap, LABELS};
use crate::{to_hash40, Hash40, Hash40Visitor, ReadHash40, WriteHash40};
use byteorder::{ByteOrder, ReadBytesExt, WriteBytesExt};
use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
use std::fmt::{Display, Error as fmtError, Formatter};
use std::io::{Error, Read, Write};
use std::num::ParseIntError;
impl Hash40 {
#[inline]
pub fn crc(self) -> u32 {
self.0 as u32
}
#[inline]
pub fn strlen(self) -> u8 {
(self.0 >> 32) as u8
}
pub fn from_hex_str(value: &str) -> Result<Self, Option<ParseIntError>> {
if &value[0..2] == "0x" {
Ok(Hash40(u64::from_str_radix(&value[2..], 16)?))
} else {
Err(None)
}
}
}
impl Display for Hash40 {
fn fmt(&self, f: &mut Formatter) -> Result<(), fmtError> {
match LABELS.lock() {
Ok(label_map) => match &*label_map {
LabelMap::Pure(map) => {
if let Some(label) = map.get(&self) {
write!(f, "{}", label)
} else {
write!(f, "0x{:010x}", self.0)
}
}
LabelMap::Custom(bimap) => {
if let Some(label) = bimap.get_by_left(&self) {
write!(f, "{}", label)
} else {
write!(f, "0x{:010x}", self.0)
}
}
LabelMap::Unset => write!(f, "0x{:010x}", self.0),
},
Err(_) => write!(f, "0x{:010x}", self.0),
}
}
}
impl<R: Read> ReadHash40 for R {
fn read_hash40<T: ByteOrder>(&mut self) -> Result<Hash40, Error> {
Ok(Hash40(self.read_u64::<T>()? & 0xff_ffff_ffff))
}
fn read_hash40_with_meta<T: ByteOrder>(&mut self) -> Result<(Hash40, u32), Error> {
let long = self.read_u64::<T>()?;
Ok((Hash40(long & 0xff_ffff_ffff), (long >> 40) as u32))
}
}
impl<W: Write> WriteHash40 for W {
fn write_hash40<T: ByteOrder>(&mut self, hash: Hash40) -> Result<(), Error> {
self.write_u64::<T>(hash.0)
}
fn write_hash40_with_meta<T: ByteOrder>(
&mut self,
hash: Hash40,
meta: u32,
) -> Result<(), Error> {
self.write_u64::<T>(hash.0 | (meta as u64) << 40)
}
}
impl<'de> de::Visitor<'de> for Hash40Visitor {
type Value = Hash40;
fn expecting(
&self,
formatter: &mut std::fmt::Formatter,
) -> std::result::Result<(), std::fmt::Error> {
formatter.write_str(
"A hex-formatted integer hash value, or a string standing for its reversed form",
)
}
fn visit_str<E: de::Error>(self, value: &str) -> Result<Self::Value, E> {
if value.starts_with("0x") {
Hash40::from_hex_str(value).map_err(|e| E::custom(e.unwrap()))
} else {
Ok(to_hash40(value))
}
}
}
impl Serialize for Hash40 {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
serializer.serialize_str(format!("{}", &self).as_ref())
}
}
impl<'de> Deserialize<'de> for Hash40 {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
deserializer.deserialize_str(Hash40Visitor)
}
}