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implement ValueType for prestat_t

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This commit is contained in:
Mark McCaskey 2019-03-29 15:39:36 -07:00
parent 4df5f02444
commit 147d71a32c
1 changed files with 52 additions and 0 deletions
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52
lib/wasi/src/syscalls/types.rs
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@ -2,6 +2,7 @@
use crate::ptr::{Array, WasmPtr};
use wasmer_runtime_core::types::{ValueError, ValueType};
use std::mem;
pub type __wasi_advice_t = u8;
pub const __WASI_ADVICE_DONTNEED: u8 = 0;
@ -170,12 +171,44 @@ pub struct __wasi_prestat_u_dir_t {
pr_name_len: u32,
}
impl ValueType for __wasi_prestat_u_dir_t {
fn into_le(self, buffer: &mut [u8]) {
self.pr_name_len
.into_le(&mut buffer[..mem::size_of::<u32>()]);
}
fn from_le(buffer: &[u8]) -> Result<Self, ValueError> {
if buffer.len() >= mem::size_of::<__wasi_iovec_t>() {
let pr_name_len = ValueType::from_le(&buffer[..mem::size_of::<u32>()])?;
Ok(Self { pr_name_len })
} else {
Err(ValueError::BufferTooSmall)
}
}
}
#[derive(Copy, Clone)]
#[repr(C)]
pub union __wasi_prestat_u {
dir: __wasi_prestat_u_dir_t,
}
impl ValueType for __wasi_prestat_u {
fn into_le(self, buffer: &mut [u8]) {
unsafe {self.dir
.into_le(&mut buffer[..mem::size_of::<__wasi_prestat_u_dir_t>()])};
}
fn from_le(buffer: &[u8]) -> Result<Self, ValueError> {
if buffer.len() >= mem::size_of::<__wasi_iovec_t>() {
let dir = ValueType::from_le(&buffer[..mem::size_of::<__wasi_prestat_u_dir_t>()])?;
Ok(Self { dir })
} else {
Err(ValueError::BufferTooSmall)
}
}
}
#[derive(Copy, Clone)]
#[repr(C)]
pub struct __wasi_prestat_t {
@ -183,6 +216,25 @@ pub struct __wasi_prestat_t {
u: __wasi_prestat_u,
}
impl ValueType for __wasi_prestat_t {
fn into_le(self, buffer: &mut [u8]) {
self.pr_type
.into_le(&mut buffer[..mem::size_of::<__wasi_preopentype_t>()]);
self.u
.into_le(&mut buffer[mem::size_of::<__wasi_preopentype_t>()..]);
}
fn from_le(buffer: &[u8]) -> Result<Self, ValueError> {
if buffer.len() >= mem::size_of::<__wasi_iovec_t>() {
let pr_type = ValueType::from_le(&buffer[..mem::size_of::<__wasi_preopentype_t>()])?;
let u = ValueType::from_le(&buffer[mem::size_of::<__wasi_preopentype_t>()..])?;
Ok(Self { pr_type, u })
} else {
Err(ValueError::BufferTooSmall)
}
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub struct __wasi_fdstat_t {