[pbs-devel] [PATCH v3 pxar 03/58] decoder: add method to read payload references

[Christian Ebner <c.ebner@proxmox.com>]

This is in preparation for reading payloads from a dedicated payload
input stream.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
---
changes since version 2:
- decode based on format struct, instead of reading u64 and constructing
  object

 src/decoder/mod.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/decoder/mod.rs b/src/decoder/mod.rs
index d1fb911..cc50e4f 100644
--- a/src/decoder/mod.rs
+++ b/src/decoder/mod.rs
@@ -661,6 +661,17 @@ impl<I: SeqRead> DecoderImpl<I> {
     async fn read_quota_project_id(&mut self) -> io::Result<format::QuotaProjectId> {
         self.read_simple_entry("quota project id").await
     }
+
+    async fn read_payload_ref(&mut self) -> io::Result<format::PayloadRef> {
+        let content_size =
+            usize::try_from(self.current_header.content_size()).map_err(io_err_other)?;
+
+        if content_size != 2 * size_of::<u64>() {
+            io_bail!("bad payload reference entry");
+        }
+
+        seq_read_entry(&mut self.input).await
+    }
 }
 
 /// Reader for file contents inside a pxar archive.
-- 
2.39.2