feat(wasi-types) Extract types from wasi to a new wasi-types crate

CHANGELOG.md

@@ -11,6 +11,7 @@ Looking for changes that affect our C API? See the [C API Changelog](lib/c-api/C
 ## 2.0.0-rc2 - 2020/06/03
 
 ### Added
+- [#2411](https://github.com/wasmerio/wasmer/pull/2411) Extract types from `wasi` to a new `wasi-types` crate.
 - [#2390](https://github.com/wasmerio/wasmer/pull/2390) Make `wasmer-vm` to compile on Windows 32bits.
 - [#2402](https://github.com/wasmerio/wasmer/pull/2402) Add more examples and more doctests for `wasmer-middlewares`.
 

Cargo.toml

@@ -46,6 +46,7 @@ members = [
     "lib/object",
     "lib/vm",
     "lib/wasi",
+    "lib/wasi-types",
     "lib/wasi-experimental-io-devices",
     "lib/types",
     "tests/lib/wast",

lib/wasi-types/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "wasmer-wasi-types"
+version = "2.0.0-rc2"
+description = "WASI types for Wasmer WebAssembly runtime"
+categories = ["wasm", "os"]
+keywords = ["wasm", "webassembly", "wasi", "sandbox", "ABI"]
+authors = ["Wasmer Engineering Team <[email protected]>"]
+repository = "https://github.com/wasmerio/wasmer"
+license = "MIT"
+readme = "README.md"
+edition = "2018"
+
+[dependencies]
+wasmer = { path = "../api", version = "2.0.0-rc2" }
+serde = { version = "1.0", features = ["derive"] }
+byteorder = "1.3"
+time = "0.1"

lib/wasi-types/README.md

@@ -0,0 +1,3 @@
+# `wasmer-wasi-types` [![Build Status](https://github.com/wasmerio/wasmer/workflows/build/badge.svg?style=flat-square)](https://github.com/wasmerio/wasmer/actions?query=workflow%3Abuild) [![Join Wasmer Slack](https://img.shields.io/static/v1?label=Slack&message=join%20chat&color=brighgreen&style=flat-square)](https://slack.wasmer.io) [![MIT License](https://img.shields.io/github/license/wasmerio/wasmer.svg?style=flat-square)](https://github.com/wasmerio/wasmer/blob/master/LICENSE) [![crates.io](https://img.shields.io/crates/v/wasmer-wasi-types.svg)](https://crates.io/crates/wasmer-wasi-types)
+
+This crate contains the WASI types necessary for `wasmer-wasi`. Please check this crate to learn more!

lib/wasi-types/src/advice.rs

@@ -0,0 +1,7 @@
+pub type __wasi_advice_t = u8;
+pub const __WASI_ADVICE_NORMAL: u8 = 0;
+pub const __WASI_ADVICE_SEQUENTIAL: u8 = 1;
+pub const __WASI_ADVICE_RANDOM: u8 = 2;
+pub const __WASI_ADVICE_WILLNEED: u8 = 3;
+pub const __WASI_ADVICE_DONTNEED: u8 = 4;
+pub const __WASI_ADVICE_NOREUSE: u8 = 5;

lib/wasi-types/src/directory.rs

@@ -0,0 +1,41 @@
+use crate::*;
+use std::mem;
+use wasmer::ValueType;
+
+pub type __wasi_dircookie_t = u64;
+pub const __WASI_DIRCOOKIE_START: u64 = 0;
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[repr(C)]
+pub struct __wasi_dirent_t {
+    pub d_next: __wasi_dircookie_t,
+    pub d_ino: __wasi_inode_t,
+    pub d_namlen: u32,
+    pub d_type: __wasi_filetype_t,
+}
+
+unsafe impl ValueType for __wasi_dirent_t {}
+
+pub fn dirent_to_le_bytes(ent: &__wasi_dirent_t) -> Vec<u8> {
+    use mem::transmute;
+
+    let mut out = Vec::with_capacity(mem::size_of::<__wasi_dirent_t>());
+    let bytes: [u8; 8] = unsafe { transmute(ent.d_next.to_le()) };
+    for &b in &bytes {
+        out.push(b);
+    }
+    let bytes: [u8; 8] = unsafe { transmute(ent.d_ino.to_le()) };
+    for &b in &bytes {
+        out.push(b);
+    }
+    let bytes: [u8; 4] = unsafe { transmute(ent.d_namlen.to_le()) };
+    for &b in &bytes {
+        out.push(b);
+    }
+    out.push(ent.d_type);
+    out.push(0);
+    out.push(0);
+    out.push(0);
+    assert_eq!(out.len(), mem::size_of::<__wasi_dirent_t>());
+    out
+}

lib/wasi-types/src/error.rs

@@ -0,0 +1,78 @@
+pub type __wasi_errno_t = u16;
+pub const __WASI_ESUCCESS: u16 = 0;
+pub const __WASI_E2BIG: u16 = 1;
+pub const __WASI_EACCES: u16 = 2;
+pub const __WASI_EADDRINUSE: u16 = 3;
+pub const __WASI_EADDRNOTAVAIL: u16 = 4;
+pub const __WASI_EAFNOSUPPORT: u16 = 5;
+pub const __WASI_EAGAIN: u16 = 6;
+pub const __WASI_EALREADY: u16 = 7;
+pub const __WASI_EBADF: u16 = 8;
+pub const __WASI_EBADMSG: u16 = 9;
+pub const __WASI_EBUSY: u16 = 10;
+pub const __WASI_ECANCELED: u16 = 11;
+pub const __WASI_ECHILD: u16 = 12;
+pub const __WASI_ECONNABORTED: u16 = 13;
+pub const __WASI_ECONNREFUSED: u16 = 14;
+pub const __WASI_ECONNRESET: u16 = 15;
+pub const __WASI_EDEADLK: u16 = 16;
+pub const __WASI_EDESTADDRREQ: u16 = 17;
+pub const __WASI_EDOM: u16 = 18;
+pub const __WASI_EDQUOT: u16 = 19;
+pub const __WASI_EEXIST: u16 = 20;
+pub const __WASI_EFAULT: u16 = 21;
+pub const __WASI_EFBIG: u16 = 22;
+pub const __WASI_EHOSTUNREACH: u16 = 23;
+pub const __WASI_EIDRM: u16 = 24;
+pub const __WASI_EILSEQ: u16 = 25;
+pub const __WASI_EINPROGRESS: u16 = 26;
+pub const __WASI_EINTR: u16 = 27;
+pub const __WASI_EINVAL: u16 = 28;
+pub const __WASI_EIO: u16 = 29;
+pub const __WASI_EISCONN: u16 = 30;
+pub const __WASI_EISDIR: u16 = 31;
+pub const __WASI_ELOOP: u16 = 32;
+pub const __WASI_EMFILE: u16 = 33;
+pub const __WASI_EMLINK: u16 = 34;
+pub const __WASI_EMSGSIZE: u16 = 35;
+pub const __WASI_EMULTIHOP: u16 = 36;
+pub const __WASI_ENAMETOOLONG: u16 = 37;
+pub const __WASI_ENETDOWN: u16 = 38;
+pub const __WASI_ENETRESET: u16 = 39;
+pub const __WASI_ENETUNREACH: u16 = 40;
+pub const __WASI_ENFILE: u16 = 41;
+pub const __WASI_ENOBUFS: u16 = 42;
+pub const __WASI_ENODEV: u16 = 43;
+pub const __WASI_ENOENT: u16 = 44;
+pub const __WASI_ENOEXEC: u16 = 45;
+pub const __WASI_ENOLCK: u16 = 46;
+pub const __WASI_ENOLINK: u16 = 47;
+pub const __WASI_ENOMEM: u16 = 48;
+pub const __WASI_ENOMSG: u16 = 49;
+pub const __WASI_ENOPROTOOPT: u16 = 50;
+pub const __WASI_ENOSPC: u16 = 51;
+pub const __WASI_ENOSYS: u16 = 52;
+pub const __WASI_ENOTCONN: u16 = 53;
+pub const __WASI_ENOTDIR: u16 = 54;
+pub const __WASI_ENOTEMPTY: u16 = 55;
+pub const __WASI_ENOTRECOVERABLE: u16 = 56;
+pub const __WASI_ENOTSOCK: u16 = 57;
+pub const __WASI_ENOTSUP: u16 = 58;
+pub const __WASI_ENOTTY: u16 = 59;
+pub const __WASI_ENXIO: u16 = 60;
+pub const __WASI_EOVERFLOW: u16 = 61;
+pub const __WASI_EOWNERDEAD: u16 = 62;
+pub const __WASI_EPERM: u16 = 63;
+pub const __WASI_EPIPE: u16 = 64;
+pub const __WASI_EPROTO: u16 = 65;
+pub const __WASI_EPROTONOSUPPORT: u16 = 66;
+pub const __WASI_EPROTOTYPE: u16 = 67;
+pub const __WASI_ERANGE: u16 = 68;
+pub const __WASI_EROFS: u16 = 69;
+pub const __WASI_ESPIPE: u16 = 70;
+pub const __WASI_ESRCH: u16 = 71;
+pub const __WASI_ESTALE: u16 = 72;
+pub const __WASI_ETIMEDOUT: u16 = 73;
+pub const __WASI_ETXTBSY: u16 = 74;
+pub const __WASI_EXDEV: u16 = 75;
+pub const __WASI_ENOTCAPABLE: u16 = 76;

lib/wasi-types/src/event.rs

@@ -0,0 +1,82 @@
+use crate::*;
+use std::fmt;
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[repr(C)]
+pub struct __wasi_event_fd_readwrite_t {
+    pub nbytes: __wasi_filesize_t,
+    pub flags: __wasi_eventrwflags_t,
+}
+
+#[derive(Copy, Clone)]
+#[repr(C)]
+pub union __wasi_event_u {
+    pub fd_readwrite: __wasi_event_fd_readwrite_t,
+}
+
+// TODO: remove this implementation of Debug when `__wasi_event_u` gets more than 1 variant
+impl fmt::Debug for __wasi_event_u {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("__wasi_event_u")
+            .field("fd_readwrite", unsafe { &self.fd_readwrite })
+            .finish()
+    }
+}
+
+#[derive(Debug, Copy, Clone)]
+pub enum EventEnum {
+    FdReadWrite {
+        nbytes: __wasi_filesize_t,
+        flags: __wasi_eventrwflags_t,
+    },
+}
+
+impl EventEnum {
+    pub fn untagged(self) -> __wasi_event_u {
+        match self {
+            EventEnum::FdReadWrite { nbytes, flags } => __wasi_event_u {
+                fd_readwrite: __wasi_event_fd_readwrite_t { nbytes, flags },
+            },
+        }
+    }
+}
+
+#[derive(Debug, Copy, Clone)]
+#[repr(C)]
+pub struct __wasi_event_t {
+    pub userdata: __wasi_userdata_t,
+    pub error: __wasi_errno_t,
+    pub type_: __wasi_eventtype_t,
+    pub u: __wasi_event_u,
+}
+
+impl __wasi_event_t {
+    pub fn tagged(&self) -> Option<EventEnum> {
+        match self.type_ {
+            __WASI_EVENTTYPE_FD_READ | __WASI_EVENTTYPE_FD_WRITE => Some(EventEnum::FdReadWrite {
+                nbytes: unsafe { self.u.fd_readwrite.nbytes },
+                flags: unsafe { self.u.fd_readwrite.flags },
+            }),
+            _ => None,
+        }
+    }
+}
+
+unsafe impl ValueType for __wasi_event_t {}
+
+pub type __wasi_eventrwflags_t = u16;
+pub const __WASI_EVENT_FD_READWRITE_HANGUP: u16 = 1 << 0;
+
+pub type __wasi_eventtype_t = u8;
+pub const __WASI_EVENTTYPE_CLOCK: u8 = 0;
+pub const __WASI_EVENTTYPE_FD_READ: u8 = 1;
+pub const __WASI_EVENTTYPE_FD_WRITE: u8 = 2;
+
+pub fn eventtype_to_str(event_type: __wasi_eventtype_t) -> &'static str {
+    match event_type {
+        __WASI_EVENTTYPE_CLOCK => "__WASI_EVENTTYPE_CLOCK",
+        __WASI_EVENTTYPE_FD_READ => "__WASI_EVENTTYPE_FD_READ",
+        __WASI_EVENTTYPE_FD_WRITE => "__WASI_EVENTTYPE_FD_WRITE",
+        _ => "INVALID EVENTTYPE",
+    }
+}