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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use std::ops::{Deref, DerefMut};
use serde::{de::Visitor, Deserialize, Deserializer, Serialize, Serializer};
pub const NAME: &str = "$__v8_magic_bytestring";
pub const FIELD_PTR: &str = "$__v8_magic_bytestring_ptr";
pub const FIELD_LEN: &str = "$__v8_magic_bytestring_len";
#[derive(PartialEq, Eq, Clone, Debug)]
pub struct ByteString(pub Vec<u8>);
impl ByteString {
pub fn new() -> ByteString {
ByteString(Vec::new())
}
pub fn with_capacity(capacity: usize) -> ByteString {
ByteString(Vec::with_capacity(capacity))
}
pub fn capacity(&self) -> usize {
self.0.capacity()
}
pub fn reserve(&mut self, additional: usize) {
self.0.reserve(additional)
}
pub fn reserve_exact(&mut self, additional: usize) {
self.0.reserve_exact(additional)
}
pub fn shrink_to_fit(&mut self) {
self.0.shrink_to_fit()
}
pub fn truncate(&mut self, len: usize) {
self.0.truncate(len)
}
pub fn push(&mut self, value: u8) {
self.0.push(value)
}
pub fn pop(&mut self) -> Option<u8> {
self.0.pop()
}
}
impl Default for ByteString {
fn default() -> Self {
ByteString::new()
}
}
impl Deref for ByteString {
type Target = [u8];
fn deref(&self) -> &[u8] {
self.0.deref()
}
}
impl DerefMut for ByteString {
fn deref_mut(&mut self) -> &mut [u8] {
self.0.deref_mut()
}
}
impl AsRef<[u8]> for ByteString {
fn as_ref(&self) -> &[u8] {
self.0.as_ref()
}
}
impl AsMut<[u8]> for ByteString {
fn as_mut(&mut self) -> &mut [u8] {
self.0.as_mut()
}
}
impl Serialize for ByteString {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
use serde::ser::SerializeStruct;
let mut s = serializer.serialize_struct(NAME, 1)?;
s.serialize_field(FIELD_PTR, &(self.0.as_ptr() as usize))?;
s.serialize_field(FIELD_LEN, &self.0.len())?;
s.end()
}
}
impl<'de> Deserialize<'de> for ByteString {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
struct ValueVisitor {}
impl<'de> Visitor<'de> for ValueVisitor {
type Value = ByteString;
fn expecting(
&self,
formatter: &mut std::fmt::Formatter,
) -> std::fmt::Result {
formatter.write_str("a serde_v8::ByteString")
}
fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
Ok(ByteString(v))
}
}
deserializer.deserialize_struct(NAME, &[], ValueVisitor {})
}
}
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