Function wiredtiger_struct_unpack 

pub unsafe extern "C" fn wiredtiger_struct_unpack(
    session: *mut WT_SESSION,
    buffer: *const c_void,
    len: usize,
    format: *const c_char,
    ...
) -> c_int

Unpack a structure from a buffer.

Reverse of ::wiredtiger_struct_pack: gets values out of a packed byte string.

@snippet ex_all.c Unpack fields from a buffer

@param session the session handle @param buffer a pointer to a packed byte array @param len the number of valid bytes in the buffer @param format the data format, see @ref packing @errors