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use crate::{
FromValue, InstallWith, Mut, Named, RawMut, RawRef, RawStr, Ref, UnsafeFromValue, Value,
VmError,
};
use std::cmp;
use std::fmt;
use std::ops;
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Bytes {
pub(crate) bytes: Vec<u8>,
}
impl Bytes {
pub const fn new() -> Self {
Bytes { bytes: Vec::new() }
}
pub fn with_capacity(cap: usize) -> Self {
Bytes {
bytes: Vec::with_capacity(cap),
}
}
pub fn into_vec(self) -> Vec<u8> {
self.bytes
}
pub fn from_vec(bytes: Vec<u8>) -> Self {
Self { bytes }
}
pub fn extend(&mut self, other: &Self) {
self.bytes.extend(other.bytes.iter().copied());
}
pub fn extend_str(&mut self, s: &str) {
self.bytes.extend(s.as_bytes());
}
pub fn is_empty(&self) -> bool {
self.bytes.is_empty()
}
pub fn len(&self) -> usize {
self.bytes.len()
}
pub fn capacity(&self) -> usize {
self.bytes.capacity()
}
pub fn clear(&mut self) {
self.bytes.clear();
}
pub fn reserve(&mut self, additional: usize) {
self.bytes.reserve(additional);
}
pub fn reserve_exact(&mut self, additional: usize) {
self.bytes.reserve_exact(additional);
}
pub fn shrink_to_fit(&mut self) {
self.bytes.shrink_to_fit();
}
pub fn pop(&mut self) -> Option<u8> {
self.bytes.pop()
}
pub fn last(&mut self) -> Option<u8> {
self.bytes.last().copied()
}
}
impl From<Vec<u8>> for Bytes {
fn from(bytes: Vec<u8>) -> Self {
Self { bytes }
}
}
impl fmt::Debug for Bytes {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt.debug_list().entries(&self.bytes).finish()
}
}
impl ops::Deref for Bytes {
type Target = [u8];
fn deref(&self) -> &Self::Target {
&self.bytes
}
}
impl ops::DerefMut for Bytes {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.bytes
}
}
impl FromValue for Bytes {
fn from_value(value: Value) -> Result<Self, VmError> {
Ok(value.into_bytes()?.borrow_ref()?.clone())
}
}
impl<'a> UnsafeFromValue for &'a Bytes {
type Output = *const Bytes;
type Guard = RawRef;
fn from_value(value: Value) -> Result<(Self::Output, Self::Guard), VmError> {
let bytes = value.into_bytes()?;
let bytes = bytes.into_ref()?;
Ok(Ref::into_raw(bytes))
}
unsafe fn unsafe_coerce(output: Self::Output) -> Self {
&*output
}
}
impl<'a> UnsafeFromValue for &'a mut Bytes {
type Output = *mut Bytes;
type Guard = RawMut;
fn from_value(value: Value) -> Result<(Self::Output, Self::Guard), VmError> {
let bytes = value.into_bytes()?;
let bytes = bytes.into_mut()?;
Ok(Mut::into_raw(bytes))
}
unsafe fn unsafe_coerce(output: Self::Output) -> Self {
&mut *output
}
}
impl<'a> UnsafeFromValue for &'a [u8] {
type Output = *const [u8];
type Guard = RawRef;
fn from_value(value: Value) -> Result<(Self::Output, Self::Guard), VmError> {
let bytes = value.into_bytes()?;
let bytes = bytes.into_ref()?;
let (value, guard) = Ref::into_raw(bytes);
Ok((unsafe { (*value).bytes.as_slice() }, guard))
}
unsafe fn unsafe_coerce(output: Self::Output) -> Self {
&*output
}
}
impl Named for Bytes {
const BASE_NAME: RawStr = RawStr::from_str("Bytes");
}
impl InstallWith for Bytes {}
impl cmp::PartialEq<[u8]> for Bytes {
fn eq(&self, other: &[u8]) -> bool {
self.bytes == other
}
}
impl cmp::PartialEq<Bytes> for [u8] {
fn eq(&self, other: &Bytes) -> bool {
self == other.bytes
}
}
#[cfg(test)]
mod tests {
use crate::{Bytes, Shared, Value};
#[test]
fn test_clone_issue() -> Result<(), Box<dyn std::error::Error>> {
let shared = Value::Bytes(Shared::new(Bytes::new()));
let _ = {
let shared = shared.into_bytes()?;
let out = shared.borrow_ref()?.clone();
out
};
Ok(())
}
}