vendor/gix-features/src/zlib/mod.rs

   1 pub use flate2::{Decompress, Status};
   2
   3 /// non-streaming interfaces for decompression
   4 pub mod inflate {
   5     /// The error returned by various [Inflate methods][super::Inflate]
   6     #[derive(Debug, thiserror::Error)]
   7     #[allow(missing_docs)]
   8     pub enum Error {
   9         #[error("Could not write all bytes when decompressing content")]
  10         WriteInflated(#[from] std::io::Error),
  11         #[error("Could not decode zip stream, status was '{0:?}'")]
  12         Inflate(#[from] flate2::DecompressError),
  13         #[error("The zlib status indicated an error, status was '{0:?}'")]
  14         Status(flate2::Status),
  15     }
  16 }
  17
  18 /// Decompress a few bytes of a zlib stream without allocation
  19 pub struct Inflate {
  20     /// The actual decompressor doing all the work.
  21     pub state: Decompress,
  22 }
  23
  24 impl Default for Inflate {
  25     fn default() -> Self {
  26         Inflate {
  27             state: Decompress::new(true),
  28         }
  29     }
  30 }
  31
  32 impl Inflate {
  33     /// Run the decompressor exactly once. Cannot be run multiple times
  34     pub fn once(&mut self, input: &[u8], out: &mut [u8]) -> Result<(flate2::Status, usize, usize), inflate::Error> {
  35         let before_in = self.state.total_in();
  36         let before_out = self.state.total_out();
  37         let status = self.state.decompress(input, out, flate2::FlushDecompress::None)?;
  38         Ok((
  39             status,
  40             (self.state.total_in() - before_in) as usize,
  41             (self.state.total_out() - before_out) as usize,
  42         ))
  43     }
  44 }
  45
  46 ///
  47 pub mod stream;