1 files changed, 125 insertions, 0 deletions
diff --git a/serde_v8/src/magic/bytestring.rs b/serde_v8/src/magic/bytestring.rs
new file mode 100644
index 000000000..e90b7528e
--- /dev/null
+++ b/serde_v8/src/magic/bytestring.rs
@@ -0,0 +1,125 @@
+// Copyright 2018-2021 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 {})
+  }
+}