Function eosio_cdt_sys::read_action_data

pub unsafe extern "C" fn read_action_data(msg: *mut c_void, len: u32) -> u32

Copy up to length bytes of current action data to the specified location

@brief Copy current action data to the specified location @param msg - a pointer where up to length bytes of the current action data will be copied @param len - len of the current action data to be copied, 0 to report required size @return the number of bytes copied to msg, or number of bytes that can be copied if len==0 passed @pre msg is a valid pointer to a range of memory at least len bytes long @post msg is filled with packed action data