[pbs-devel] [RFC pxar 08/36] encoder: add payload position capability

[Christian Ebner]

Allows to read the current payload offset from the dedicated payload
input stream. This is required to get the current offset for calculation
of forced boundaries in the proxmox-backup-client, when injecting reused
payload chunks into the payload stream.

Signed-off-by: Christian Ebner <c.ebner at proxmox.com>
---
 src/encoder/aio.rs  | 5 +++++
 src/encoder/mod.rs  | 4 ++++
 src/encoder/sync.rs | 5 +++++
 3 files changed, 14 insertions(+)

diff --git a/src/encoder/aio.rs b/src/encoder/aio.rs
index 07ad275..12121fc 100644
--- a/src/encoder/aio.rs
+++ b/src/encoder/aio.rs
@@ -79,6 +79,11 @@ impl<'a, T: SeqWrite + 'a> Encoder<'a, T> {
         })
     }
 
+    /// Get current position for payload stream
+    pub fn payload_position(&self) -> io::Result<PayloadOffset> {
+        self.inner.payload_position()
+    }
+
     // /// Convenience shortcut to add a *regular* file by path including its contents to the archive.
     // pub async fn add_file<P, F>(
     //     &mut self,
diff --git a/src/encoder/mod.rs b/src/encoder/mod.rs
index 5b196df..921a0d9 100644
--- a/src/encoder/mod.rs
+++ b/src/encoder/mod.rs
@@ -496,6 +496,10 @@ impl<'a, T: SeqWrite + 'a> EncoderImpl<'a, T> {
         Ok(offset)
     }
 
+    pub fn payload_position(&self) -> io::Result<PayloadOffset> {
+        Ok(PayloadOffset(self.state()?.payload_position()))
+    }
+
     /// Encode a payload reference, returning the payload offset within the payload stream
     pub async fn add_payload_ref(
         &mut self,
diff --git a/src/encoder/sync.rs b/src/encoder/sync.rs
index ac78ae3..818279f 100644
--- a/src/encoder/sync.rs
+++ b/src/encoder/sync.rs
@@ -100,6 +100,11 @@ impl<'a, T: SeqWrite + 'a> Encoder<'a, T> {
         ))
     }
 
+    /// Get current payload position for payload stream
+    pub fn payload_position(&self) -> io::Result<PayloadOffset> {
+        self.inner.payload_position()
+    }
+
     /// Encode a payload reference, returning the payload offset within the payload stream
     pub async fn add_payload_ref(
         &mut self,
-- 
2.39.2