mirror of
https://github.com/denoland/deno.git
synced 2024-12-22 23:34:47 -05:00
bfc1fb8d68
Towards #16315
76 lines
1.9 KiB
Rust
76 lines
1.9 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
|
|
use super::buffer::ZeroCopyBuf;
|
|
use super::transl8::{FromV8, 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(),
|
|
}
|
|
}
|
|
}
|