diff options
Diffstat (limited to 'adenosine-pds/src/vendored/iroh_car/util.rs')
-rw-r--r-- | adenosine-pds/src/vendored/iroh_car/util.rs | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/adenosine-pds/src/vendored/iroh_car/util.rs b/adenosine-pds/src/vendored/iroh_car/util.rs deleted file mode 100644 index 90435b1..0000000 --- a/adenosine-pds/src/vendored/iroh_car/util.rs +++ /dev/null @@ -1,95 +0,0 @@ -use integer_encoding::VarIntAsyncReader; -use libipld::Cid; -use tokio::io::{AsyncRead, AsyncReadExt}; - -use super::error::Error; - -/// Maximum size that is used for single node. -pub(crate) const MAX_ALLOC: usize = 4 * 1024 * 1024; - -pub(crate) async fn ld_read<R>(mut reader: R, buf: &mut Vec<u8>) -> Result<Option<&[u8]>, Error> -where - R: AsyncRead + Send + Unpin, -{ - let length: usize = match VarIntAsyncReader::read_varint_async(&mut reader).await { - Ok(len) => len, - Err(e) => { - if e.kind() == std::io::ErrorKind::UnexpectedEof { - return Ok(None); - } - return Err(Error::Parsing(e.to_string())); - } - }; - - if length > MAX_ALLOC { - return Err(Error::LdReadTooLarge(length)); - } - if length > buf.len() { - buf.resize(length, 0); - } - - reader - .read_exact(&mut buf[..length]) - .await - .map_err(|e| Error::Parsing(e.to_string()))?; - - Ok(Some(&buf[..length])) -} - -pub(crate) async fn read_node<R>( - buf_reader: &mut R, - buf: &mut Vec<u8>, -) -> Result<Option<(Cid, Vec<u8>)>, Error> -where - R: AsyncRead + Send + Unpin, -{ - if let Some(buf) = ld_read(buf_reader, buf).await? { - let mut cursor = std::io::Cursor::new(buf); - let c = Cid::read_bytes(&mut cursor)?; - let pos = cursor.position() as usize; - - return Ok(Some((c, buf[pos..].to_vec()))); - } - Ok(None) -} - -#[cfg(test)] -mod tests { - use integer_encoding::VarIntAsyncWriter; - use tokio::io::{AsyncWrite, AsyncWriteExt}; - - use super::*; - - async fn ld_write<'a, W>(writer: &mut W, bytes: &[u8]) -> Result<(), Error> - where - W: AsyncWrite + Send + Unpin, - { - writer.write_varint_async(bytes.len()).await?; - writer.write_all(bytes).await?; - writer.flush().await?; - Ok(()) - } - - #[tokio::test] - async fn ld_read_write_good() { - let mut buffer = Vec::<u8>::new(); - ld_write(&mut buffer, b"test bytes").await.unwrap(); - let reader = std::io::Cursor::new(buffer); - - let mut buffer = vec![1u8; 1024]; - let read = ld_read(reader, &mut buffer).await.unwrap().unwrap(); - assert_eq!(read, b"test bytes"); - } - - #[tokio::test] - async fn ld_read_write_fail() { - let mut buffer = Vec::<u8>::new(); - let size = MAX_ALLOC + 1; - ld_write(&mut buffer, &vec![2u8; size]).await.unwrap(); - let reader = std::io::Cursor::new(buffer); - - let mut buffer = vec![1u8; 1024]; - let read = ld_read(reader, &mut buffer).await; - assert!(matches!(read, Err(Error::LdReadTooLarge(_)))); - } -} |