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authorValentin Popov <valentin@popov.link>2024-01-08 00:21:28 +0300
committerValentin Popov <valentin@popov.link>2024-01-08 00:21:28 +0300
commit1b6a04ca5504955c571d1c97504fb45ea0befee4 (patch)
tree7579f518b23313e8a9748a88ab6173d5e030b227 /vendor/errno/src/windows.rs
parent5ecd8cf2cba827454317368b68571df0d13d7842 (diff)
downloadfparkan-1b6a04ca5504955c571d1c97504fb45ea0befee4.tar.xz
fparkan-1b6a04ca5504955c571d1c97504fb45ea0befee4.zip
Initial vendor packages
Signed-off-by: Valentin Popov <valentin@popov.link>
Diffstat (limited to 'vendor/errno/src/windows.rs')
-rw-r--r--vendor/errno/src/windows.rs81
1 files changed, 81 insertions, 0 deletions
diff --git a/vendor/errno/src/windows.rs b/vendor/errno/src/windows.rs
new file mode 100644
index 0000000..9c7c0e4
--- /dev/null
+++ b/vendor/errno/src/windows.rs
@@ -0,0 +1,81 @@
+//! Implementation of `errno` functionality for Windows.
+//!
+//! Adapted from `src/libstd/sys/windows/os.rs` in the Rust distribution.
+
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use core::char::{self, REPLACEMENT_CHARACTER};
+use core::ptr;
+use core::str;
+use windows_sys::Win32::Foundation::{GetLastError, SetLastError, WIN32_ERROR};
+use windows_sys::Win32::System::Diagnostics::Debug::{
+ FormatMessageW, FORMAT_MESSAGE_FROM_SYSTEM, FORMAT_MESSAGE_IGNORE_INSERTS,
+};
+
+use crate::Errno;
+
+fn from_utf16_lossy<'a>(input: &[u16], output: &'a mut [u8]) -> &'a str {
+ let mut output_len = 0;
+ for c in char::decode_utf16(input.iter().copied().take_while(|&x| x != 0))
+ .map(|x| x.unwrap_or(REPLACEMENT_CHARACTER))
+ {
+ let c_len = c.len_utf8();
+ if c_len > output.len() - output_len {
+ break;
+ }
+ c.encode_utf8(&mut output[output_len..]);
+ output_len += c_len;
+ }
+ unsafe { str::from_utf8_unchecked(&output[..output_len]) }
+}
+
+pub fn with_description<F, T>(err: Errno, callback: F) -> T
+where
+ F: FnOnce(Result<&str, Errno>) -> T,
+{
+ // This value is calculated from the macro
+ // MAKELANGID(LANG_SYSTEM_DEFAULT, SUBLANG_SYS_DEFAULT)
+ let lang_id = 0x0800_u32;
+
+ let mut buf = [0u16; 2048];
+
+ unsafe {
+ let res = FormatMessageW(
+ FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+ ptr::null_mut(),
+ err.0 as u32,
+ lang_id,
+ buf.as_mut_ptr(),
+ buf.len() as u32,
+ ptr::null_mut(),
+ );
+ if res == 0 {
+ // Sometimes FormatMessageW can fail e.g. system doesn't like lang_id
+ let fm_err = errno();
+ return callback(Err(fm_err));
+ }
+
+ let mut msg = [0u8; 2048];
+ let msg = from_utf16_lossy(&buf[..res as usize], &mut msg[..]);
+ // Trim trailing CRLF inserted by FormatMessageW
+ callback(Ok(msg.trim_end()))
+ }
+}
+
+pub const STRERROR_NAME: &str = "FormatMessageW";
+
+pub fn errno() -> Errno {
+ unsafe { Errno(GetLastError() as i32) }
+}
+
+pub fn set_errno(Errno(errno): Errno) {
+ unsafe { SetLastError(errno as WIN32_ERROR) }
+}