libz_rs_sys

Function inflateCopy

Source 
#[export_name = "inflateCopy"]
pub unsafe extern "C-unwind" fn inflateCopy(
    dest: *mut z_stream,
    source: *const z_stream,
) -> i32
Expand description

Sets the destination stream as a complete copy of the source stream.

This function can be useful when randomly accessing a large stream. The first pass through the stream can periodically record the inflate state, allowing restarting inflate at those points when randomly accessing the stream.

§Returns

  • Z_OK if success
  • Z_MEM_ERROR if there was not enough memory
  • Z_STREAM_ERROR if the source stream state was inconsistent (such as zalloc being NULL)

The msg field is left unchanged in both source and destination.

§Safety

The caller must guarantee that

  • Either
    • dest is NULL
    • dest satisfies the requirements of &mut *(dest as *mut MaybeUninit<z_stream>)
  • Either
    • source is NULL
    • source satisfies the requirements of &mut *strm and was initialized with inflateInit_ or similar