Function bz3_decode_block 

pub unsafe extern "C" fn bz3_decode_block(
    state: *mut bz3_state,
    buffer: *mut u8,
    buffer_size: usize,
    compressed_size: i32,
    orig_size: i32,
) -> i32

@brief Decode a single block.

buffer' must be able to hold at least bz3_bound(orig_size)’ bytes in order to ensure decompression will succeed for all possible bzip3 blocks.

In most (but not all) cases, orig_size should usually be sufficient. If it is not sufficient, you must allocate a buffer of size bz3_bound(orig_size) temporarily.

If buffer_size is too small, BZ3_ERR_DATA_SIZE_TOO_SMALL will be returned. The size must not exceed the block size associated with the state.

@param buffer_size The size of the buffer at ‘buffer’ @param compressed_size The size of the compressed data in ‘buffer’ @param orig_size The original size of the data before compression.