[pbs-devel] [RFC pxar 09/36] encoder: add payload advance capabilty

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

Allows to advance the payload writer position by a given size.
This is used to update the encoders payload input position when
injecting reused chunks for files with unchanged metadata.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
---
 src/encoder/aio.rs  | 5 +++++
 src/encoder/mod.rs  | 6 ++++++
 src/encoder/sync.rs | 5 +++++
 3 files changed, 16 insertions(+)

diff --git a/src/encoder/aio.rs b/src/encoder/aio.rs
index 12121fc..a44e040 100644
--- a/src/encoder/aio.rs
+++ b/src/encoder/aio.rs
@@ -117,6 +117,11 @@ impl<'a, T: SeqWrite + 'a> Encoder<'a, T> {
             .await
     }
 
+    /// Add size to payload stream
+    pub fn advance(&mut self, size: u64) -> io::Result<()> {
+        self.inner.advance(size)
+    }
+
     /// Create a new subdirectory. Note that the subdirectory has to be finished by calling the
     /// `finish()` method, otherwise the entire archive will be in an error state.
     pub async fn create_directory<P: AsRef<Path>>(
diff --git a/src/encoder/mod.rs b/src/encoder/mod.rs
index 921a0d9..dbb6fcb 100644
--- a/src/encoder/mod.rs
+++ b/src/encoder/mod.rs
@@ -525,6 +525,12 @@ impl<'a, T: SeqWrite + 'a> EncoderImpl<'a, T> {
         Ok(())
     }
 
+    /// Add size to payload stream
+    pub fn advance(&mut self, size: u64) -> io::Result<()> {
+        self.state_mut()?.payload_write_position += size;
+        Ok(())
+    }
+
     /// Return a file offset usable with `add_hardlink`.
     pub async fn add_symlink(
         &mut self,
diff --git a/src/encoder/sync.rs b/src/encoder/sync.rs
index 818279f..00fced5 100644
--- a/src/encoder/sync.rs
+++ b/src/encoder/sync.rs
@@ -121,6 +121,11 @@ impl<'a, T: SeqWrite + 'a> Encoder<'a, T> {
         ))
     }
 
+    /// Add size to payload stream
+    pub fn advance(&mut self, size: u64) -> io::Result<()> {
+        self.inner.advance(size)
+    }
+
     /// Create a new subdirectory. Note that the subdirectory has to be finished by calling the
     /// `finish()` method, otherwise the entire archive will be in an error state.
     pub fn create_directory<P: AsRef<Path>>(
-- 
2.39.2