use super::buffer::ZeroCopyBuf;
use super::transl8::FromV8;
use super::transl8::ToV8;
use crate::magic::transl8::impl_magic;
use crate::Error;
use std::ops::Deref;
#[derive(Debug)]
pub enum StringOrBuffer {
Buffer(ZeroCopyBuf),
String(String),
}
impl_magic!(StringOrBuffer);
impl Deref for StringOrBuffer {
type Target = [u8];
fn deref(&self) -> &Self::Target {
match self {
Self::Buffer(b) => b.as_ref(),
Self::String(s) => s.as_bytes(),
}
}
}
impl ToV8 for StringOrBuffer {
fn to_v8<'a>(
&mut self,
scope: &mut v8::HandleScope<'a>,
) -> Result<v8::Local<'a, v8::Value>, crate::Error> {
match self {
Self::Buffer(buf) => {
let buf: Box<[u8]> = match buf {
ZeroCopyBuf::FromV8(buf) => {
let value: &[u8] = buf;
value.into()
}
ZeroCopyBuf::Temp(_) => unreachable!(),
ZeroCopyBuf::ToV8(ref mut x) => {
x.take().expect("ZeroCopyBuf was empty")
}
};
let backing_store =
v8::ArrayBuffer::new_backing_store_from_boxed_slice(buf);
Ok(
v8::ArrayBuffer::with_backing_store(scope, &backing_store.into())
.into(),
)
}
Self::String(s) => crate::to_v8(scope, s),
}
}
}
impl FromV8 for StringOrBuffer {
fn from_v8(
scope: &mut v8::HandleScope,
value: v8::Local<v8::Value>,
) -> Result<Self, crate::Error> {
if let Ok(buf) = ZeroCopyBuf::from_v8(scope, value) {
return Ok(Self::Buffer(buf));
} else if let Ok(s) = crate::from_v8(scope, value) {
return Ok(Self::String(s));
}
Err(Error::ExpectedBuffer)
}
}
impl From<StringOrBuffer> for bytes::Bytes {
fn from(sob: StringOrBuffer) -> Self {
match sob {
StringOrBuffer::Buffer(b) => b.into(),
StringOrBuffer::String(s) => s.into_bytes().into(),
}
}
}