1 files changed, 247 insertions, 0 deletions
diff --git a/vendor/rustix/src/backend/libc/conv.rs b/vendor/rustix/src/backend/libc/conv.rs
new file mode 100644
index 0000000..2539510
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/conv.rs
@@ -0,0 +1,247 @@
+//! Libc call arguments and return values are often things like `c_int`,
+//! `c_uint`, or libc-specific pointer types. This module provides functions
+//! for converting between rustix's types and libc types.
+
+use super::c;
+#[cfg(all(feature = "alloc", not(any(windows, target_os = "espidf"))))]
+use super::fd::IntoRawFd;
+use super::fd::{AsRawFd, BorrowedFd, FromRawFd, LibcFd, OwnedFd, RawFd};
+#[cfg(not(windows))]
+use crate::ffi::CStr;
+use crate::io;
+
+#[cfg(not(windows))]
+#[inline]
+pub(super) fn c_str(c: &CStr) -> *const c::c_char {
+    c.as_ptr()
+}
+
+#[cfg(not(any(windows, target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(super) fn no_fd() -> LibcFd {
+    -1
+}
+
+#[inline]
+pub(super) fn borrowed_fd(fd: BorrowedFd<'_>) -> LibcFd {
+    fd.as_raw_fd() as LibcFd
+}
+
+#[cfg(all(
+    feature = "alloc",
+    not(any(windows, target_os = "espidf", target_os = "redox"))
+))]
+#[inline]
+pub(super) fn owned_fd(fd: OwnedFd) -> LibcFd {
+    fd.into_raw_fd() as LibcFd
+}
+
+#[inline]
+pub(super) fn ret(raw: c::c_int) -> io::Result<()> {
+    if raw == 0 {
+        Ok(())
+    } else {
+        Err(io::Errno::last_os_error())
+    }
+}
+
+#[cfg(apple)]
+#[inline]
+pub(super) fn nonnegative_ret(raw: c::c_int) -> io::Result<()> {
+    if raw >= 0 {
+        Ok(())
+    } else {
+        Err(io::Errno::last_os_error())
+    }
+}
+
+#[cfg(not(any(windows, target_os = "wasi")))]
+#[inline]
+pub(super) unsafe fn ret_infallible(raw: c::c_int) {
+    debug_assert_eq!(raw, 0, "unexpected error: {:?}", io::Errno::last_os_error());
+}
+
+#[inline]
+pub(super) fn ret_c_int(raw: c::c_int) -> io::Result<c::c_int> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw)
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(super) fn ret_u32(raw: c::c_int) -> io::Result<u32> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw as u32)
+    }
+}
+
+#[inline]
+pub(super) fn ret_usize(raw: c::ssize_t) -> io::Result<usize> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        debug_assert!(raw >= 0);
+        Ok(raw as usize)
+    }
+}
+
+#[cfg(not(windows))]
+#[cfg(feature = "fs")]
+#[inline]
+pub(super) fn ret_off_t(raw: c::off_t) -> io::Result<c::off_t> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw)
+    }
+}
+
+#[cfg(not(any(windows, target_os = "wasi")))]
+#[inline]
+pub(super) fn ret_pid_t(raw: c::pid_t) -> io::Result<c::pid_t> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw)
+    }
+}
+
+/// Convert a `c_int` returned from a libc function to an `OwnedFd`, if valid.
+///
+/// # Safety
+///
+/// The caller must ensure that this is the return value of a libc function
+/// which returns an owned file descriptor.
+#[inline]
+pub(super) unsafe fn ret_owned_fd(raw: LibcFd) -> io::Result<OwnedFd> {
+    if raw == !0 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(OwnedFd::from_raw_fd(raw as RawFd))
+    }
+}
+
+#[cfg(not(any(windows, target_os = "wasi")))]
+#[inline]
+pub(super) fn ret_discarded_fd(raw: LibcFd) -> io::Result<()> {
+    if raw == !0 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(())
+    }
+}
+
+#[cfg(all(feature = "alloc", not(any(windows, target_os = "wasi"))))]
+#[inline]
+pub(super) fn ret_discarded_char_ptr(raw: *mut c::c_char) -> io::Result<()> {
+    if raw.is_null() {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(())
+    }
+}
+
+/// Convert the buffer-length argument value of a `send` or `recv` call.
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[inline]
+pub(super) fn send_recv_len(len: usize) -> usize {
+    len
+}
+
+/// Convert the buffer-length argument value of a `send` or `recv` call.
+#[cfg(windows)]
+#[inline]
+pub(super) fn send_recv_len(len: usize) -> i32 {
+    // On Windows, the length argument has type `i32`; saturate the length,
+    // since `send` and `recv` are allowed to send and recv less data than
+    // requested.
+    len.try_into().unwrap_or(i32::MAX)
+}
+
+/// Convert the return value of a `send` or `recv` call.
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[inline]
+pub(super) fn ret_send_recv(len: isize) -> io::Result<usize> {
+    ret_usize(len)
+}
+
+/// Convert the return value of a `send` or `recv` call.
+#[cfg(windows)]
+#[inline]
+pub(super) fn ret_send_recv(len: i32) -> io::Result<usize> {
+    ret_usize(len as isize)
+}
+
+/// Convert the value to the `msg_iovlen` field of a `msghdr` struct.
+#[cfg(all(
+    not(any(windows, target_os = "espidf", target_os = "redox", target_os = "wasi")),
+    any(
+        target_os = "android",
+        all(target_os = "linux", not(target_env = "musl"))
+    )
+))]
+#[inline]
+pub(super) fn msg_iov_len(len: usize) -> c::size_t {
+    len
+}
+
+/// Convert the value to the `msg_iovlen` field of a `msghdr` struct.
+#[cfg(all(
+    not(any(
+        windows,
+        target_os = "espidf",
+        target_os = "redox",
+        target_os = "vita",
+        target_os = "wasi"
+    )),
+    not(any(
+        target_os = "android",
+        all(target_os = "linux", not(target_env = "musl"))
+    ))
+))]
+#[inline]
+pub(crate) fn msg_iov_len(len: usize) -> c::c_int {
+    len.try_into().unwrap_or(c::c_int::MAX)
+}
+
+/// Convert the value to a `socklen_t`.
+#[cfg(any(
+    bsd,
+    solarish,
+    target_env = "musl",
+    target_os = "aix",
+    target_os = "emscripten",
+    target_os = "fuchsia",
+    target_os = "haiku",
+    target_os = "nto",
+))]
+#[inline]
+pub(crate) fn msg_control_len(len: usize) -> c::socklen_t {
+    len.try_into().unwrap_or(c::socklen_t::MAX)
+}
+
+/// Convert the value to a `size_t`.
+#[cfg(not(any(
+    bsd,
+    solarish,
+    windows,
+    target_env = "musl",
+    target_os = "aix",
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+#[inline]
+pub(crate) fn msg_control_len(len: usize) -> c::size_t {
+    len
+}