Files
wasmtime/crates/wasi-common/src/old/snapshot_0/helpers.rs
Dan Gohman d645902620 Add support for wasi_snapshot_preview1. (#592)
* Add support for wasi_snapshot_preview1.

This adds support for the new ABI, while preserving compatibility
support for the old ABI.

* Fix compilation on platforms where nlink_t isn't 64-bit.

* rustfmt

* Fix Windows build errors.
2019-11-18 22:07:16 -08:00

21 lines
681 B
Rust

use crate::old::snapshot_0::{Error, Result};
use std::convert::TryInto;
use std::str;
use std::time::{SystemTime, UNIX_EPOCH};
pub(crate) fn systemtime_to_timestamp(st: SystemTime) -> Result<u64> {
st.duration_since(UNIX_EPOCH)
.map_err(|_| Error::EINVAL)? // date earlier than UNIX_EPOCH
.as_nanos()
.try_into()
.map_err(Into::into) // u128 doesn't fit into u64
}
/// Creates not-owned WASI path from byte slice.
///
/// NB WASI spec requires bytes to be valid UTF-8. Otherwise,
/// `__WASI_ERRNO_ILSEQ` error is returned.
pub(crate) fn path_from_slice<'a>(s: &'a [u8]) -> Result<&'a str> {
str::from_utf8(s).map_err(|_| Error::EILSEQ)
}