From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Mon, 8 Jan 2024 01:21:28 +0400 Subject: Initial vendor packages Signed-off-by: Valentin Popov --- vendor/rustix/src/backend/libc/conv.rs | 247 +++++++++++++++++++++++++++++++++ 1 file changed, 247 insertions(+) create mode 100644 vendor/rustix/src/backend/libc/conv.rs (limited to 'vendor/rustix/src/backend/libc/conv.rs') 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 { + 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 { + 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 { + 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 { + 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 { + 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 { + 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 { + 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 { + 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 +} -- cgit v1.2.3