Function BZ2_bzRead 

#[unsafe(export_name = "BZ2_bzRead")]
pub unsafe extern "C" fn BZ2_bzRead(
    bzerror: *mut c_int,
    b: *mut BZFILE,
    buf: *mut c_void,
    len: c_int,
) -> c_int

Reads up to len (uncompressed) bytes from the compressed file b into the buffer buf.

Returns

The number of bytes read

Possible assignments to bzerror

• BZ_PARAM_ERROR if any of
  • b.is_null()
  • buf.is_null()
  • len < 0
• BZ_SEQUENCE_ERROR if b was opened with BZ2_bzWriteOpen
• BZ_IO_ERROR if there is an error reading from the compressed file
• BZ_UNEXPECTED_EOF if the compressed data ends before the logical end-of-stream was detected
• BZ_DATA_ERROR if a data integrity error is detected in the compressed stream
• BZ_DATA_ERROR_MAGIC if the compressed stream doesn’t begin with the right magic bytes
• BZ_MEM_ERROR if insufficient memory is available
• BZ_STREAM_END if the logical end-of-stream was detected
• BZ_OK otherwise

Safety

The caller must guarantee that

• bzerror satisfies the requirements of pointer::as_mut
• Either
  • b is NULL
  • b is initialized with BZ2_bzReadOpen or BZ2_bzWriteOpen
• Either
  • buf is NULL
  • buf is writable for len bytes