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// SPDX-FileCopyrightText: edef <edef@unfathomable.blue>
// SPDX-License-Identifier: OSL-3.0
use {
super::SyscallArg,
std::fmt::{self, Debug},
};
#[derive(Clone, Copy, Eq, PartialEq)]
pub(crate) struct FileDesc(i32);
impl Debug for FileDesc {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.0)
}
}
impl SyscallArg for FileDesc {
fn try_from_reg(reg: u64) -> Option<Self> {
Some(match i32::try_from_reg(reg)? {
fd @ 0..=i32::MAX => FileDesc(fd),
_ => return None,
})
}
}
impl SyscallArg for Option<FileDesc> {
fn try_from_reg(reg: u64) -> Option<Self> {
Some(match i32::try_from_reg(reg)? {
-1 => None,
fd @ 0..=i32::MAX => Some(FileDesc(fd)),
_ => return None,
})
}
}
#[derive(Clone, Copy, Eq, PartialEq)]
pub(crate) enum DirFd {
Cwd,
Fd(FileDesc),
}
const AT_FDCWD: i32 = -100;
impl Debug for DirFd {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
DirFd::Cwd => write!(f, "AT_FDCWD"),
DirFd::Fd(FileDesc(fd)) => write!(f, "{fd}"),
}
}
}
impl SyscallArg for DirFd {
fn try_from_reg(reg: u64) -> Option<Self> {
Some(match i32::try_from_reg(reg)? {
AT_FDCWD => Self::Cwd,
fd @ 0..=i32::MAX => DirFd::Fd(FileDesc(fd)),
_ => return None,
})
}
}
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