10 pub(crate) fn unpack_bytes(msg: &[u8], off: usize, field: &mut [u8]) -> Result<usize> {  in unpack_bytes()
11     let new_off = off + field.len();  in unpack_bytes()
15     field.copy_from_slice(&msg[off..new_off]);  in unpack_bytes()
25 pub(crate) fn unpack_uint16(msg: &[u8], off: usize) -> Result<(u16, usize)> {  in unpack_uint16()
26     if off + UINT16LEN > msg.len() {  in unpack_uint16()
31         (msg[off] as u16) << 8 | (msg[off + 1] as u16),  in unpack_uint16()
32         off + UINT16LEN,  in unpack_uint16()
36 pub(crate) fn skip_uint16(msg: &[u8], off: usize) -> Result<usize> {  in skip_uint16()
37     if off + UINT16LEN > msg.len() {  in skip_uint16()
40     Ok(off + UINT16LEN)  in skip_uint16()
49 pub(crate) fn unpack_uint32(msg: &[u8], off: usize) -> Result<(u32, usize)> {  in unpack_uint32()
50     if off + UINT32LEN > msg.len() {  in unpack_uint32()
53     let v = (msg[off] as u32) << 24  in unpack_uint32()
54         | (msg[off + 1] as u32) << 16  in unpack_uint32()
55         | (msg[off + 2] as u32) << 8  in unpack_uint32()
56         | (msg[off + 3] as u32);  in unpack_uint32()
57     Ok((v, off + UINT32LEN))  in unpack_uint32()
60 pub(crate) fn skip_uint32(msg: &[u8], off: usize) -> Result<usize> {  in skip_uint32()
61     if off + UINT32LEN > msg.len() {  in skip_uint32()
64     Ok(off + UINT32LEN)  in skip_uint32()
78 pub(crate) fn unpack_str(msg: &[u8], off: usize) -> Result<(String, usize)> {  in unpack_str()
79     if off >= msg.len() {  in unpack_str()
82     let begin_off = off + 1;  in unpack_str()
83     let end_off = begin_off + msg[off] as usize;  in unpack_str()