7 use crate::{io::SeekFrom, syscall::SystemError};
45     pub fn read_u8(&mut self) -> Result<u8, SystemError> {  in read_u8()  argument
47             return Err(SystemError::E2BIG);  in read_u8()
54     pub fn read_u16(&mut self) -> Result<u16, SystemError> {  in read_u16()  argument
56             return Err(SystemError::E2BIG);  in read_u16()
68     pub fn read_u32(&mut self) -> Result<u32, SystemError> {  in read_u32()  argument
70             return Err(SystemError::E2BIG);  in read_u32()
82     pub fn read_u64(&mut self) -> Result<u64, SystemError> {  in read_u64()  argument
84             return Err(SystemError::E2BIG);  in read_u64()
101     pub fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), SystemError> {  in read_exact()  argument
103             return Err(SystemError::E2BIG);  in read_exact()
113     pub fn read_u16_into(&mut self, buf: &mut [u16]) -> Result<(), SystemError> {  in read_u16_into()  argument
115             return Err(SystemError::E2BIG);  in read_u16_into()
131     pub fn seek(&mut self, origin: SeekFrom) -> Result<usize, SystemError> {  in seek()  argument
145                 return Err(SystemError::EINVAL);  in seek()
150             return Err(SystemError::EOVERFLOW);  in seek()
157     pub fn write_u8(&mut self, value: u8) -> Result<u8, SystemError> {  in write_u8()  argument
159             return Err(SystemError::E2BIG);  in write_u8()
169     pub fn write_u16(&mut self, value: u16) -> Result<u16, SystemError> {  in write_u16()  argument
171             return Err(SystemError::E2BIG);  in write_u16()
183     pub fn write_u32(&mut self, value: u32) -> Result<u32, SystemError> {  in write_u32()  argument
185             return Err(SystemError::E2BIG);  in write_u32()
197     pub fn write_u64(&mut self, value: u64) -> Result<u64, SystemError> {  in write_u64()  argument
199             return Err(SystemError::E2BIG);  in write_u64()
216     pub fn write_exact(&mut self, buf: &[u8]) -> Result<(), SystemError> {  in write_exact()  argument
218             return Err(SystemError::E2BIG);  in write_exact()