wasmer-wasi-fl 0.17.1

#![allow(non_camel_case_types, clippy::identity_op)]

use crate::ptr::{Array, WasmPtr};
use byteorder::{ReadBytesExt, WriteBytesExt, LE};
use serde::{Deserialize, Serialize};
use std::fmt;
use std::mem;
use wasmer_runtime_core::types::ValueType;

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;

#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub struct __wasi_ciovec_t {
    pub buf: WasmPtr<u8, Array>,
    pub buf_len: u32,
}

unsafe impl ValueType for __wasi_ciovec_t {}

pub type __wasi_clockid_t = u32;
pub const __WASI_CLOCK_REALTIME: u32 = 0;
pub const __WASI_CLOCK_MONOTONIC: u32 = 1;
pub const __WASI_CLOCK_PROCESS_CPUTIME_ID: u32 = 2;
pub const __WASI_CLOCK_THREAD_CPUTIME_ID: u32 = 3;

pub type __wasi_device_t = u64;

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 std::mem::transmute;
    let mut out = Vec::with_capacity(std::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(), std::mem::size_of::<__wasi_dirent_t>());
    out
}

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;

#[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 std::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",
    }
}

pub type __wasi_exitcode_t = u32;

pub type __wasi_fd_t = u32;
pub const __WASI_STDIN_FILENO: u32 = 0;
pub const __WASI_STDOUT_FILENO: u32 = 1;
pub const __WASI_STDERR_FILENO: u32 = 2;

pub type __wasi_fdflags_t = u16;
pub const __WASI_FDFLAG_APPEND: u16 = 1 << 0;
pub const __WASI_FDFLAG_DSYNC: u16 = 1 << 1;
pub const __WASI_FDFLAG_NONBLOCK: u16 = 1 << 2;
pub const __WASI_FDFLAG_RSYNC: u16 = 1 << 3;
pub const __WASI_FDFLAG_SYNC: u16 = 1 << 4;

pub type __wasi_preopentype_t = u8;
pub const __WASI_PREOPENTYPE_DIR: u8 = 0;

#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub struct __wasi_prestat_u_dir_t {
    pub pr_name_len: u32,
}

unsafe impl ValueType for __wasi_prestat_u_dir_t {}

#[derive(Copy, Clone)]
#[repr(C)]
pub union __wasi_prestat_u {
    dir: __wasi_prestat_u_dir_t,
}

impl fmt::Debug for __wasi_prestat_u {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "__wasi_prestat_u")
    }
}

unsafe impl ValueType for __wasi_prestat_u {}

#[derive(Debug, Copy, Clone)]
#[repr(C)]
pub struct __wasi_prestat_t {
    pub pr_type: __wasi_preopentype_t,
    pub u: __wasi_prestat_u,
}

#[derive(Copy, Clone)]
pub enum PrestatEnum {
    Dir { pr_name_len: u32 },
}

impl PrestatEnum {
    pub fn untagged(self) -> __wasi_prestat_u {
        match self {
            PrestatEnum::Dir { pr_name_len } => __wasi_prestat_u {
                dir: __wasi_prestat_u_dir_t { pr_name_len },
            },
        }
    }
}

impl __wasi_prestat_t {
    pub fn tagged(&self) -> Option<PrestatEnum> {
        match self.pr_type {
            __WASI_PREOPENTYPE_DIR => Some(PrestatEnum::Dir {
                pr_name_len: unsafe { self.u.dir.pr_name_len },
            }),
            _ => None,
        }
    }
}

unsafe impl ValueType for __wasi_prestat_t {}

#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub struct __wasi_fdstat_t {
    pub fs_filetype: __wasi_filetype_t,
    pub fs_flags: __wasi_fdflags_t,
    pub fs_rights_base: __wasi_rights_t,
    pub fs_rights_inheriting: __wasi_rights_t,
}

unsafe impl ValueType for __wasi_fdstat_t {}

pub type __wasi_filedelta_t = i64;

pub type __wasi_filesize_t = u64;

#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[repr(C)]
pub struct __wasi_filestat_t {
    pub st_dev: __wasi_device_t,
    pub st_ino: __wasi_inode_t,
    pub st_filetype: __wasi_filetype_t,
    pub st_nlink: __wasi_linkcount_t,
    pub st_size: __wasi_filesize_t,
    pub st_atim: __wasi_timestamp_t,
    pub st_mtim: __wasi_timestamp_t,
    pub st_ctim: __wasi_timestamp_t,
}

impl Default for __wasi_filestat_t {
    fn default() -> Self {
        __wasi_filestat_t {
            st_dev: Default::default(),
            st_ino: Default::default(),
            st_filetype: __WASI_FILETYPE_UNKNOWN,
            st_nlink: 1,
            st_size: Default::default(),
            st_atim: Default::default(),
            st_mtim: Default::default(),
            st_ctim: Default::default(),
        }
    }
}

impl std::fmt::Debug for __wasi_filestat_t {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let convert_ts_into_time_string = |ts| {
            let tspec = time::Timespec::new(ts as i64 / 1_000_000_000, (ts % 1_000_000_000) as i32);
            let tm = time::at(tspec);
            let out_time = tm.rfc822();
            format!("{} ({})", out_time, ts)
        };
        f.debug_struct("__wasi_filestat_t")
            .field("st_dev", &self.st_dev)
            .field("st_ino", &self.st_ino)
            .field(
                "st_filetype",
                &format!(
                    "{} ({})",
                    wasi_filetype_to_name(self.st_filetype),
                    self.st_filetype,
                ),
            )
            .field("st_nlink", &self.st_nlink)
            .field("st_size", &self.st_size)
            .field("st_atim", &convert_ts_into_time_string(self.st_atim))
            .field("st_mtim", &convert_ts_into_time_string(self.st_mtim))
            .field("st_ctim", &convert_ts_into_time_string(self.st_ctim))
            .finish()
    }
}

unsafe impl ValueType for __wasi_filestat_t {}

pub fn wasi_filetype_to_name(ft: __wasi_filetype_t) -> &'static str {
    match ft {
        __WASI_FILETYPE_UNKNOWN => "Unknown",
        __WASI_FILETYPE_BLOCK_DEVICE => "Block device",
        __WASI_FILETYPE_CHARACTER_DEVICE => "Character device",
        __WASI_FILETYPE_DIRECTORY => "Directory",
        __WASI_FILETYPE_REGULAR_FILE => "Regular file",
        __WASI_FILETYPE_SOCKET_DGRAM => "Socket dgram",
        __WASI_FILETYPE_SOCKET_STREAM => "Socket stream",
        __WASI_FILETYPE_SYMBOLIC_LINK => "Symbolic link",
        _ => "Invalid",
    }
}

pub type __wasi_filetype_t = u8;
pub const __WASI_FILETYPE_UNKNOWN: u8 = 0;
pub const __WASI_FILETYPE_BLOCK_DEVICE: u8 = 1;
pub const __WASI_FILETYPE_CHARACTER_DEVICE: u8 = 2;
pub const __WASI_FILETYPE_DIRECTORY: u8 = 3;
pub const __WASI_FILETYPE_REGULAR_FILE: u8 = 4;
pub const __WASI_FILETYPE_SOCKET_DGRAM: u8 = 5;
pub const __WASI_FILETYPE_SOCKET_STREAM: u8 = 6;
pub const __WASI_FILETYPE_SYMBOLIC_LINK: u8 = 7;

pub type __wasi_fstflags_t = u16;
pub const __WASI_FILESTAT_SET_ATIM: u16 = 1 << 0;
pub const __WASI_FILESTAT_SET_ATIM_NOW: u16 = 1 << 1;
pub const __WASI_FILESTAT_SET_MTIM: u16 = 1 << 2;
pub const __WASI_FILESTAT_SET_MTIM_NOW: u16 = 1 << 3;

pub type __wasi_inode_t = u64;

#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub struct __wasi_iovec_t {
    pub buf: WasmPtr<u8, Array>,
    pub buf_len: u32,
}

unsafe impl ValueType for __wasi_iovec_t {}

pub type __wasi_linkcount_t = u64;

pub type __wasi_lookupflags_t = u32;
pub const __WASI_LOOKUP_SYMLINK_FOLLOW: u32 = 1 << 0;

pub type __wasi_oflags_t = u16;
pub const __WASI_O_CREAT: u16 = 1 << 0;
pub const __WASI_O_DIRECTORY: u16 = 1 << 1;
pub const __WASI_O_EXCL: u16 = 1 << 2;
pub const __WASI_O_TRUNC: u16 = 1 << 3;

pub type __wasi_riflags_t = u16;
pub const __WASI_SOCK_RECV_PEEK: u16 = 1 << 0;
pub const __WASI_SOCK_RECV_WAITALL: u16 = 1 << 1;

pub type __wasi_rights_t = u64;
pub const __WASI_RIGHT_FD_DATASYNC: u64 = 1 << 0;
pub const __WASI_RIGHT_FD_READ: u64 = 1 << 1;
pub const __WASI_RIGHT_FD_SEEK: u64 = 1 << 2;
pub const __WASI_RIGHT_FD_FDSTAT_SET_FLAGS: u64 = 1 << 3;
pub const __WASI_RIGHT_FD_SYNC: u64 = 1 << 4;
pub const __WASI_RIGHT_FD_TELL: u64 = 1 << 5;
pub const __WASI_RIGHT_FD_WRITE: u64 = 1 << 6;
pub const __WASI_RIGHT_FD_ADVISE: u64 = 1 << 7;
pub const __WASI_RIGHT_FD_ALLOCATE: u64 = 1 << 8;
pub const __WASI_RIGHT_PATH_CREATE_DIRECTORY: u64 = 1 << 9;
pub const __WASI_RIGHT_PATH_CREATE_FILE: u64 = 1 << 10;
pub const __WASI_RIGHT_PATH_LINK_SOURCE: u64 = 1 << 11;
pub const __WASI_RIGHT_PATH_LINK_TARGET: u64 = 1 << 12;
pub const __WASI_RIGHT_PATH_OPEN: u64 = 1 << 13;
pub const __WASI_RIGHT_FD_READDIR: u64 = 1 << 14;
pub const __WASI_RIGHT_PATH_READLINK: u64 = 1 << 15;
pub const __WASI_RIGHT_PATH_RENAME_SOURCE: u64 = 1 << 16;
pub const __WASI_RIGHT_PATH_RENAME_TARGET: u64 = 1 << 17;
pub const __WASI_RIGHT_PATH_FILESTAT_GET: u64 = 1 << 18;
pub const __WASI_RIGHT_PATH_FILESTAT_SET_SIZE: u64 = 1 << 19;
pub const __WASI_RIGHT_PATH_FILESTAT_SET_TIMES: u64 = 1 << 20;
pub const __WASI_RIGHT_FD_FILESTAT_GET: u64 = 1 << 21;
pub const __WASI_RIGHT_FD_FILESTAT_SET_SIZE: u64 = 1 << 22;
pub const __WASI_RIGHT_FD_FILESTAT_SET_TIMES: u64 = 1 << 23;
pub const __WASI_RIGHT_PATH_SYMLINK: u64 = 1 << 24;
pub const __WASI_RIGHT_PATH_REMOVE_DIRECTORY: u64 = 1 << 25;
pub const __WASI_RIGHT_PATH_UNLINK_FILE: u64 = 1 << 26;
pub const __WASI_RIGHT_POLL_FD_READWRITE: u64 = 1 << 27;
pub const __WASI_RIGHT_SOCK_SHUTDOWN: u64 = 1 << 28;

/// function for debugging rights issues
#[allow(dead_code)]
pub fn print_right_set(rights: __wasi_rights_t) {
    // BTreeSet for consistent order
    let mut right_set = std::collections::BTreeSet::new();
    for i in 0..28 {
        let cur_right = rights & (1 << i);
        if cur_right != 0 {
            right_set.insert(right_to_string(cur_right).unwrap_or("INVALID RIGHT"));
        }
    }
    println!("{:#?}", right_set);
}

/// expects a single right, returns None if out of bounds or > 1 bit set
pub fn right_to_string(right: __wasi_rights_t) -> Option<&'static str> {
    Some(match right {
        __WASI_RIGHT_FD_DATASYNC => "__WASI_RIGHT_FD_DATASYNC",
        __WASI_RIGHT_FD_READ => "__WASI_RIGHT_FD_READ",
        __WASI_RIGHT_FD_SEEK => "__WASI_RIGHT_FD_SEEK",
        __WASI_RIGHT_FD_FDSTAT_SET_FLAGS => "__WASI_RIGHT_FD_FDSTAT_SET_FLAGS",
        __WASI_RIGHT_FD_SYNC => "__WASI_RIGHT_FD_SYNC",
        __WASI_RIGHT_FD_TELL => "__WASI_RIGHT_FD_TELL",
        __WASI_RIGHT_FD_WRITE => "__WASI_RIGHT_FD_WRITE",
        __WASI_RIGHT_FD_ADVISE => "__WASI_RIGHT_FD_ADVISE",
        __WASI_RIGHT_FD_ALLOCATE => "__WASI_RIGHT_FD_ALLOCATE",
        __WASI_RIGHT_PATH_CREATE_DIRECTORY => "__WASI_RIGHT_PATH_CREATE_DIRECTORY",
        __WASI_RIGHT_PATH_CREATE_FILE => "__WASI_RIGHT_PATH_CREATE_FILE",
        __WASI_RIGHT_PATH_LINK_SOURCE => "__WASI_RIGHT_PATH_LINK_SOURCE",
        __WASI_RIGHT_PATH_LINK_TARGET => "__WASI_RIGHT_PATH_LINK_TARGET",
        __WASI_RIGHT_PATH_OPEN => "__WASI_RIGHT_PATH_OPEN",
        __WASI_RIGHT_FD_READDIR => "__WASI_RIGHT_FD_READDIR",
        __WASI_RIGHT_PATH_READLINK => "__WASI_RIGHT_PATH_READLINK",
        __WASI_RIGHT_PATH_RENAME_SOURCE => "__WASI_RIGHT_PATH_RENAME_SOURCE",
        __WASI_RIGHT_PATH_RENAME_TARGET => "__WASI_RIGHT_PATH_RENAME_TARGET",
        __WASI_RIGHT_PATH_FILESTAT_GET => "__WASI_RIGHT_PATH_FILESTAT_GET",
        __WASI_RIGHT_PATH_FILESTAT_SET_SIZE => "__WASI_RIGHT_PATH_FILESTAT_SET_SIZE",
        __WASI_RIGHT_PATH_FILESTAT_SET_TIMES => "__WASI_RIGHT_PATH_FILESTAT_SET_TIMES",
        __WASI_RIGHT_FD_FILESTAT_GET => "__WASI_RIGHT_FD_FILESTAT_GET",
        __WASI_RIGHT_FD_FILESTAT_SET_SIZE => "__WASI_RIGHT_FD_FILESTAT_SET_SIZE",
        __WASI_RIGHT_FD_FILESTAT_SET_TIMES => "__WASI_RIGHT_FD_FILESTAT_SET_TIMES",
        __WASI_RIGHT_PATH_SYMLINK => "__WASI_RIGHT_PATH_SYMLINK",
        __WASI_RIGHT_PATH_UNLINK_FILE => "__WASI_RIGHT_PATH_UNLINK_FILE",
        __WASI_RIGHT_PATH_REMOVE_DIRECTORY => "__WASI_RIGHT_PATH_REMOVE_DIRECTORY",
        __WASI_RIGHT_POLL_FD_READWRITE => "__WASI_RIGHT_POLL_FD_READWRITE",
        __WASI_RIGHT_SOCK_SHUTDOWN => "__WASI_RIGHT_SOCK_SHUTDOWN",
        _ => return None,
    })
}

pub type __wasi_roflags_t = u16;
pub const __WASI_SOCK_RECV_DATA_TRUNCATED: u16 = 1 << 0;

pub type __wasi_sdflags_t = u8;
pub const __WASI_SHUT_RD: u8 = 1 << 0;
pub const __WASI_SHUT_WR: u8 = 1 << 1;

pub type __wasi_siflags_t = u16;

pub type __wasi_signal_t = u8;
pub const __WASI_SIGHUP: u8 = 1;
pub const __WASI_SIGINT: u8 = 2;
pub const __WASI_SIGQUIT: u8 = 3;
pub const __WASI_SIGILL: u8 = 4;
pub const __WASI_SIGTRAP: u8 = 5;
pub const __WASI_SIGABRT: u8 = 6;
pub const __WASI_SIGBUS: u8 = 7;
pub const __WASI_SIGFPE: u8 = 8;
pub const __WASI_SIGKILL: u8 = 9;
pub const __WASI_SIGUSR1: u8 = 10;
pub const __WASI_SIGSEGV: u8 = 11;
pub const __WASI_SIGUSR2: u8 = 12;
pub const __WASI_SIGPIPE: u8 = 13;
pub const __WASI_SIGALRM: u8 = 14;
pub const __WASI_SIGTERM: u8 = 15;
pub const __WASI_SIGCHLD: u8 = 16;
pub const __WASI_SIGCONT: u8 = 17;
pub const __WASI_SIGSTOP: u8 = 18;
pub const __WASI_SIGTSTP: u8 = 19;
pub const __WASI_SIGTTIN: u8 = 20;
pub const __WASI_SIGTTOU: u8 = 21;
pub const __WASI_SIGURG: u8 = 22;
pub const __WASI_SIGXCPU: u8 = 23;
pub const __WASI_SIGXFSZ: u8 = 24;
pub const __WASI_SIGVTALRM: u8 = 25;
pub const __WASI_SIGPROF: u8 = 26;
pub const __WASI_SIGWINCH: u8 = 27;
pub const __WASI_SIGPOLL: u8 = 28;
pub const __WASI_SIGPWR: u8 = 29;
pub const __WASI_SIGSYS: u8 = 30;

pub type __wasi_subclockflags_t = u16;
pub const __WASI_SUBSCRIPTION_CLOCK_ABSTIME: u16 = 1 << 0;

#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub struct __wasi_subscription_clock_t {
    pub clock_id: __wasi_clockid_t,
    pub timeout: __wasi_timestamp_t,
    pub precision: __wasi_timestamp_t,
    pub flags: __wasi_subclockflags_t,
}

#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(C)]
pub struct __wasi_subscription_fs_readwrite_t {
    pub fd: __wasi_fd_t,
}

#[derive(Copy, Clone)]
#[repr(C)]
pub union __wasi_subscription_u {
    pub clock: __wasi_subscription_clock_t,
    pub fd_readwrite: __wasi_subscription_fs_readwrite_t,
}

#[derive(Copy, Clone)]
#[repr(C)]
pub struct __wasi_subscription_t {
    pub userdata: __wasi_userdata_t,
    pub type_: __wasi_eventtype_t,
    pub u: __wasi_subscription_u,
}

/// Safe Rust wrapper around `__wasi_subscription_t::type_` and `__wasi_subscription_t::u`
#[derive(Debug, Clone)]
pub enum EventType {
    Clock(__wasi_subscription_clock_t),
    Read(__wasi_subscription_fs_readwrite_t),
    Write(__wasi_subscription_fs_readwrite_t),
}

impl EventType {
    pub fn raw_tag(&self) -> __wasi_eventtype_t {
        match self {
            EventType::Clock(_) => __WASI_EVENTTYPE_CLOCK,
            EventType::Read(_) => __WASI_EVENTTYPE_FD_READ,
            EventType::Write(_) => __WASI_EVENTTYPE_FD_WRITE,
        }
    }
}

/// Safe Rust wrapper around `__wasi_subscription_t`
#[derive(Debug, Clone)]
pub struct WasiSubscription {
    pub user_data: __wasi_userdata_t,
    pub event_type: EventType,
}

impl std::convert::TryFrom<__wasi_subscription_t> for WasiSubscription {
    type Error = __wasi_errno_t;

    fn try_from(ws: __wasi_subscription_t) -> Result<Self, Self::Error> {
        Ok(Self {
            user_data: ws.userdata,
            event_type: match ws.type_ {
                __WASI_EVENTTYPE_CLOCK => EventType::Clock(unsafe { ws.u.clock }),
                __WASI_EVENTTYPE_FD_READ => EventType::Read(unsafe { ws.u.fd_readwrite }),
                __WASI_EVENTTYPE_FD_WRITE => EventType::Write(unsafe { ws.u.fd_readwrite }),
                _ => return Err(__WASI_EINVAL),
            },
        })
    }
}

impl std::convert::TryFrom<WasiSubscription> for __wasi_subscription_t {
    type Error = __wasi_errno_t;

    fn try_from(ws: WasiSubscription) -> Result<Self, Self::Error> {
        let (type_, u) = match ws.event_type {
            EventType::Clock(c) => (__WASI_EVENTTYPE_CLOCK, __wasi_subscription_u { clock: c }),
            EventType::Read(rw) => (
                __WASI_EVENTTYPE_FD_READ,
                __wasi_subscription_u { fd_readwrite: rw },
            ),
            EventType::Write(rw) => (
                __WASI_EVENTTYPE_FD_WRITE,
                __wasi_subscription_u { fd_readwrite: rw },
            ),
            _ => return Err(__WASI_EINVAL),
        };

        Ok(Self {
            userdata: ws.user_data,
            type_,
            u,
        })
    }
}

impl std::fmt::Debug for __wasi_subscription_t {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("__wasi_subscription_t")
            .field("userdata", &self.userdata)
            .field("type", &eventtype_to_str(self.type_))
            .field(
                "u",
                match self.type_ {
                    __WASI_EVENTTYPE_CLOCK => unsafe { &self.u.clock },
                    __WASI_EVENTTYPE_FD_READ | __WASI_EVENTTYPE_FD_WRITE => unsafe {
                        &self.u.fd_readwrite
                    },
                    _ => &"INVALID EVENTTYPE",
                },
            )
            .finish()
    }
}

unsafe impl ValueType for __wasi_subscription_t {}

pub enum SubscriptionEnum {
    Clock(__wasi_subscription_clock_t),
    FdReadWrite(__wasi_subscription_fs_readwrite_t),
}

impl __wasi_subscription_t {
    pub fn tagged(&self) -> Option<SubscriptionEnum> {
        match self.type_ {
            __WASI_EVENTTYPE_CLOCK => Some(SubscriptionEnum::Clock(unsafe { self.u.clock })),
            __WASI_EVENTTYPE_FD_READ | __WASI_EVENTTYPE_FD_WRITE => {
                Some(SubscriptionEnum::FdReadWrite(unsafe {
                    self.u.fd_readwrite
                }))
            }
            _ => None,
        }
    }
}

pub type __wasi_timestamp_t = u64;

pub type __wasi_userdata_t = u64;

pub type __wasi_whence_t = u8;
pub const __WASI_WHENCE_SET: u8 = 0;
pub const __WASI_WHENCE_CUR: u8 = 1;
pub const __WASI_WHENCE_END: u8 = 2;

pub mod snapshot0 {
    use serde::{Deserialize, Serialize};
    pub type __wasi_linkcount_t = u32;
    use wasmer_runtime_core::types::ValueType;

    #[derive(Debug, Copy, Clone, PartialEq, Eq)]
    #[repr(C)]
    pub struct __wasi_subscription_clock_t {
        pub userdata: super::__wasi_userdata_t,
        pub clock_id: super::__wasi_clockid_t,
        pub timeout: super::__wasi_timestamp_t,
        pub precision: super::__wasi_timestamp_t,
        pub flags: super::__wasi_subclockflags_t,
    }

    #[derive(Copy, Clone)]
    #[repr(C)]
    pub union __wasi_subscription_u {
        pub clock: __wasi_subscription_clock_t,
        pub fd_readwrite: super::__wasi_subscription_fs_readwrite_t,
    }

    #[derive(Copy, Clone)]
    #[repr(C)]
    pub struct __wasi_subscription_t {
        pub userdata: super::__wasi_userdata_t,
        pub type_: super::__wasi_eventtype_t,
        pub u: __wasi_subscription_u,
    }

    unsafe impl ValueType for __wasi_subscription_t {}

    pub type __wasi_whence_t = u8;
    pub const __WASI_WHENCE_CUR: u8 = 0;
    pub const __WASI_WHENCE_END: u8 = 1;
    pub const __WASI_WHENCE_SET: u8 = 2;

    #[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
    #[repr(C)]
    pub struct __wasi_filestat_t {
        pub st_dev: super::__wasi_device_t,
        pub st_ino: super::__wasi_inode_t,
        pub st_filetype: super::__wasi_filetype_t,
        pub st_nlink: __wasi_linkcount_t,
        pub st_size: super::__wasi_filesize_t,
        pub st_atim: super::__wasi_timestamp_t,
        pub st_mtim: super::__wasi_timestamp_t,
        pub st_ctim: super::__wasi_timestamp_t,
    }

    unsafe impl ValueType for __wasi_filestat_t {}

    impl std::fmt::Debug for __wasi_filestat_t {
        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
            let convert_ts_into_time_string = |ts| {
                let tspec =
                    time::Timespec::new(ts as i64 / 1_000_000_000, (ts % 1_000_000_000) as i32);
                let tm = time::at(tspec);
                let out_time = tm.rfc822();
                format!("{} ({})", out_time, ts)
            };
            f.debug_struct("__wasi_filestat_t")
                .field("st_dev", &self.st_dev)
                .field("st_ino", &self.st_ino)
                .field(
                    "st_filetype",
                    &format!(
                        "{} ({})",
                        super::wasi_filetype_to_name(self.st_filetype),
                        self.st_filetype,
                    ),
                )
                .field("st_nlink", &self.st_nlink)
                .field("st_size", &self.st_size)
                .field("st_atim", &convert_ts_into_time_string(self.st_atim))
                .field("st_mtim", &convert_ts_into_time_string(self.st_mtim))
                .field("st_ctim", &convert_ts_into_time_string(self.st_ctim))
                .finish()
        }
    }

    impl std::fmt::Debug for __wasi_subscription_t {
        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
            f.debug_struct("__wasi_subscription_t")
                .field("userdata", &self.userdata)
                .field("type", &super::eventtype_to_str(self.type_))
                .field(
                    "u",
                    match self.type_ {
                        super::__WASI_EVENTTYPE_CLOCK => unsafe { &self.u.clock },
                        super::__WASI_EVENTTYPE_FD_READ | super::__WASI_EVENTTYPE_FD_WRITE => unsafe {
                            &self.u.fd_readwrite
                        },
                        _ => &"INVALID EVENTTYPE",
                    },
                )
                .finish()
        }
    }
}