1 files changed, 47 insertions, 0 deletions
diff --git a/vendor/gix-features/src/zlib/mod.rs b/vendor/gix-features/src/zlib/mod.rs
new file mode 100644
index 000000000..8dcdfd93f
--- /dev/null
+++ b/vendor/gix-features/src/zlib/mod.rs
@@ -0,0 +1,47 @@
+pub use flate2::{Decompress, Status};
+
+/// non-streaming interfaces for decompression
+pub mod inflate {
+    /// The error returned by various [Inflate methods][super::Inflate]
+    #[derive(Debug, thiserror::Error)]
+    #[allow(missing_docs)]
+    pub enum Error {
+        #[error("Could not write all bytes when decompressing content")]
+        WriteInflated(#[from] std::io::Error),
+        #[error("Could not decode zip stream, status was '{0:?}'")]
+        Inflate(#[from] flate2::DecompressError),
+        #[error("The zlib status indicated an error, status was '{0:?}'")]
+        Status(flate2::Status),
+    }
+}
+
+/// Decompress a few bytes of a zlib stream without allocation
+pub struct Inflate {
+    /// The actual decompressor doing all the work.
+    pub state: Decompress,
+}
+
+impl Default for Inflate {
+    fn default() -> Self {
+        Inflate {
+            state: Decompress::new(true),
+        }
+    }
+}
+
+impl Inflate {
+    /// Run the decompressor exactly once. Cannot be run multiple times
+    pub fn once(&mut self, input: &[u8], out: &mut [u8]) -> Result<(flate2::Status, usize, usize), inflate::Error> {
+        let before_in = self.state.total_in();
+        let before_out = self.state.total_out();
+        let status = self.state.decompress(input, out, flate2::FlushDecompress::None)?;
+        Ok((
+            status,
+            (self.state.total_in() - before_in) as usize,
+            (self.state.total_out() - before_out) as usize,
+        ))
+    }
+}
+
+///
+pub mod stream;