Function deflate

#[export_name = "deflate"]
pub unsafe extern "C-unwind" fn deflate(
    strm: *mut z_stream,
    flush: i32,
) -> c_int

Compresses as much data as possible, and stops when the input buffer becomes empty or the output buffer becomes full.

Returns

• Z_OK if success
• Z_STREAM_END if the end of the compressed data has been reached and all uncompressed output has been produced
• Z_STREAM_ERROR if the stream state was inconsistent
• Z_BUF_ERROR if no progress was possible or if there was not enough room in the output buffer when Z_FINISH is used

Note that Z_BUF_ERROR is not fatal, and deflate can be called again with more input and more output space to continue decompressing.

Safety

• Either
  • strm is NULL
  • strm satisfies the requirements of &mut *strm and was initialized with deflateInit_ or similar
• Either
  • strm.next_out is NULL
  • strm.next_out and strm.avail_out satisfy the requirements of core::slice::from_raw_parts_mut::<MaybeUninit<u8>>
• Either
  • strm.next_in is NULL
  • strm.next_in and strm.avail_in satisfy the requirements of core::slice::from_raw_parts::<u8>