forked from M-Labs/artiq-zynq
add libio (to be shared between runtime and satman)
Reviewed-on: M-Labs/artiq-zynq#138 Co-authored-by: mwojcik <mw@m-labs.hk> Co-committed-by: mwojcik <mw@m-labs.hk>
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35250b3f56
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[package]
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authors = ["M-Labs"]
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name = "io"
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version = "0.0.0"
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[lib]
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name = "io"
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path = "lib.rs"
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[dependencies]
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core_io = { version = "0.1", features = ["collections"] }
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byteorder = { version = "1.0", default-features = false, optional = true }
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libsupport_zynq = { default-features = false, features = ["alloc_core"], git = "https://git.m-labs.hk/M-Labs/zynq-rs.git" }
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[features]
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alloc = []
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use core_io::{Read, Write, Error as IoError};
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#[derive(Debug, Clone)]
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pub struct Cursor<T> {
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inner: T,
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pos: usize
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}
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impl<T> Cursor<T> {
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#[inline]
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pub fn new(inner: T) -> Cursor<T> {
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Cursor { inner, pos: 0 }
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}
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#[inline]
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pub fn into_inner(self) -> T {
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self.inner
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}
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#[inline]
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pub fn get_ref(&self) -> &T {
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&self.inner
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}
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#[inline]
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pub fn get_mut(&mut self) -> &mut T {
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&mut self.inner
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}
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#[inline]
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pub fn position(&self) -> usize {
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self.pos
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}
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#[inline]
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pub fn set_position(&mut self, pos: usize) {
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self.pos = pos
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}
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}
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impl<T: AsRef<[u8]>> Read for Cursor<T> {
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fn read(&mut self, buf: &mut [u8]) -> Result<usize, IoError> {
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let data = &self.inner.as_ref()[self.pos..];
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let len = buf.len().min(data.len());
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buf[..len].copy_from_slice(&data[..len]);
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self.pos += len;
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Ok(len)
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}
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}
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impl Write for Cursor<&mut [u8]> {
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fn write(&mut self, buf: &[u8]) -> Result<usize, IoError> {
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let data = &mut self.inner[self.pos..];
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let len = buf.len().min(data.len());
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data[..len].copy_from_slice(&buf[..len]);
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self.pos += len;
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Ok(len)
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}
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#[inline]
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fn flush(&mut self) -> Result<(), IoError> {
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Ok(())
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}
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}
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#[cfg(feature = "alloc")]
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impl Write for Cursor<::alloc::Vec<u8>> {
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#[inline]
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fn write(&mut self, buf: &[u8]) -> Result<usize, IoError> {
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self.inner.extend_from_slice(buf);
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Ok(buf.len())
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}
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#[inline]
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fn flush(&mut self) -> Result<(), IoError> {
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Ok(())
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}
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}
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#![no_std]
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#![feature(never_type)]
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#![cfg_attr(feature = "alloc", feature(alloc))]
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extern crate alloc;
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extern crate core_io;
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#[cfg(feature = "alloc")]
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#[macro_use]
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use alloc;
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#[cfg(feature = "byteorder")]
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extern crate byteorder;
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pub mod cursor;
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#[cfg(feature = "byteorder")]
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pub mod proto;
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pub use cursor::Cursor;
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#[cfg(feature = "byteorder")]
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pub use proto::{ProtoRead, ProtoWrite};
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#[cfg(all(feature = "byteorder", feature = "alloc"))]
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pub use proto::ReadStringError;
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use core::str::Utf8Error;
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use byteorder::{ByteOrder, NativeEndian};
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use alloc::vec;
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use alloc::string::String;
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use core_io::{Read, Write, Error as IoError};
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#[allow(dead_code)]
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#[derive(Debug, Clone, PartialEq)]
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pub enum ReadStringError<T> {
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Utf8(Utf8Error),
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Other(T)
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}
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pub trait ProtoRead {
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type ReadError;
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fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Self::ReadError>;
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#[inline]
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fn read_u8(&mut self) -> Result<u8, Self::ReadError> {
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let mut bytes = [0; 1];
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self.read_exact(&mut bytes)?;
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Ok(bytes[0])
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}
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#[inline]
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fn read_u16(&mut self) -> Result<u16, Self::ReadError> {
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let mut bytes = [0; 2];
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self.read_exact(&mut bytes)?;
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Ok(NativeEndian::read_u16(&bytes))
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}
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#[inline]
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fn read_u32(&mut self) -> Result<u32, Self::ReadError> {
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let mut bytes = [0; 4];
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self.read_exact(&mut bytes)?;
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Ok(NativeEndian::read_u32(&bytes))
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}
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#[inline]
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fn read_u64(&mut self) -> Result<u64, Self::ReadError> {
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let mut bytes = [0; 8];
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self.read_exact(&mut bytes)?;
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Ok(NativeEndian::read_u64(&bytes))
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}
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#[inline]
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fn read_bool(&mut self) -> Result<bool, Self::ReadError> {
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Ok(self.read_u8()? != 0)
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}
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#[inline]
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fn read_bytes(&mut self) -> Result<::alloc::vec::Vec<u8>, Self::ReadError> {
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let length = self.read_u32()?;
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let mut value = vec![0; length as usize];
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self.read_exact(&mut value)?;
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Ok(value)
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}
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#[inline]
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fn read_string(&mut self) -> Result<::alloc::string::String, ReadStringError<Self::ReadError>> {
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let bytes = self.read_bytes().map_err(ReadStringError::Other)?;
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String::from_utf8(bytes).map_err(|err| ReadStringError::Utf8(err.utf8_error()))
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}
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}
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pub trait ProtoWrite {
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type WriteError;
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fn write_all(&mut self, buf: &[u8]) -> Result<(), Self::WriteError>;
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#[inline]
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fn write_u8(&mut self, value: u8) -> Result<(), Self::WriteError> {
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let bytes = [value; 1];
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self.write_all(&bytes)
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}
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#[inline]
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fn write_i8(&mut self, value: i8) -> Result<(), Self::WriteError> {
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let bytes = [value as u8; 1];
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self.write_all(&bytes)
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}
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#[inline]
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fn write_u16(&mut self, value: u16) -> Result<(), Self::WriteError> {
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let mut bytes = [0; 2];
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NativeEndian::write_u16(&mut bytes, value);
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self.write_all(&bytes)
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}
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#[inline]
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fn write_i16(&mut self, value: i16) -> Result<(), Self::WriteError> {
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let mut bytes = [0; 2];
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NativeEndian::write_i16(&mut bytes, value);
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self.write_all(&bytes)
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}
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#[inline]
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fn write_u32(&mut self, value: u32) -> Result<(), Self::WriteError> {
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let mut bytes = [0; 4];
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NativeEndian::write_u32(&mut bytes, value);
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self.write_all(&bytes)
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}
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#[inline]
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fn write_i32(&mut self, value: i32) -> Result<(), Self::WriteError> {
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let mut bytes = [0; 4];
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NativeEndian::write_i32(&mut bytes, value);
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self.write_all(&bytes)
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}
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#[inline]
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fn write_u64(&mut self, value: u64) -> Result<(), Self::WriteError> {
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let mut bytes = [0; 8];
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NativeEndian::write_u64(&mut bytes, value);
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self.write_all(&bytes)
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}
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#[inline]
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fn write_i64(&mut self, value: i64) -> Result<(), Self::WriteError> {
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let mut bytes = [0; 8];
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NativeEndian::write_i64(&mut bytes, value);
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self.write_all(&bytes)
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}
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#[inline]
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fn write_bool(&mut self, value: bool) -> Result<(), Self::WriteError> {
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self.write_u8(value as u8)
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}
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#[inline]
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fn write_bytes(&mut self, value: &[u8]) -> Result<(), Self::WriteError> {
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self.write_u32(value.len() as u32)?;
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self.write_all(value)
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}
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#[inline]
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fn write_string(&mut self, value: &str) -> Result<(), Self::WriteError> {
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self.write_bytes(value.as_bytes())
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}
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}
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impl<T> ProtoRead for T where T: Read + ?Sized {
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type ReadError = IoError;
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fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Self::ReadError> {
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T::read_exact(self, buf)
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}
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}
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impl<T> ProtoWrite for T where T: Write + ?Sized {
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type WriteError = IoError;
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fn write_all(&mut self, buf: &[u8]) -> Result<(), Self::WriteError> {
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T::write_all(self, buf)
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}
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}
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