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From: Christian Ebner <c.ebner@proxmox.com>
To: pbs-devel@lists.proxmox.com
Date: Fri, 22 Sep 2023 09:16:03 +0200
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Subject: [pbs-devel] [RFC pxar 2/20] fix #3174: decoder: factor out
skip_bytes from skip_entry
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Allows to skip bytes independently of the current entries header, as is
implemented by skip_entry.
Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
---
src/decoder/mod.rs | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/src/decoder/mod.rs b/src/decoder/mod.rs
index d1fb911..2ca263b 100644
--- a/src/decoder/mod.rs
+++ b/src/decoder/mod.rs
@@ -562,20 +562,25 @@ impl<I: SeqRead> DecoderImpl<I> {
// These utilize additional information and hence are not part of the `dyn SeqRead` impl.
//
- async fn skip_entry(&mut self, offset: u64) -> io::Result<()> {
- let mut len = self.current_header.content_size() - offset;
+ async fn skip_bytes(&mut self, len: usize) -> io::Result<()> {
+ let mut remaining = len;
let scratch = scratch_buffer();
- while len >= (scratch.len() as u64) {
+ while remaining >= scratch.len() {
seq_read_exact(&mut self.input, scratch).await?;
- len -= scratch.len() as u64;
+ remaining -= scratch.len();
}
- let len = len as usize;
- if len > 0 {
- seq_read_exact(&mut self.input, &mut scratch[..len]).await?;
+ if remaining > 0 {
+ seq_read_exact(&mut self.input, &mut scratch[..remaining]).await?;
}
Ok(())
}
+ async fn skip_entry(&mut self, offset: u64) -> io::Result<()> {
+ let len =
+ usize::try_from(self.current_header.content_size() - offset).map_err(io_err_other)?;
+ self.skip_bytes(len).await
+ }
+
async fn read_entry_as_bytes(&mut self) -> io::Result<Vec<u8>> {
let size = usize::try_from(self.current_header.content_size()).map_err(io_err_other)?;
let data = seq_read_exact_data(&mut self.input, size).await?;
--
2.39.2