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Vendor dependencies for 0.3.0 release

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Robert Garrett
2025-09-27 10:29:08 -05:00
parent 0c8d39d483
commit 82ab7f317b
26803 changed files with 16134934 additions and 0 deletions
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{"files":{"Cargo.lock":"14146de16512ab17f65cefd74b8ef70672c7d68b75824c0b66905336781ff809","Cargo.toml":"faee5081070c217099105eb50ac3c890a5e5c7a9c247d4cea5fe5685614e082f","README.md":"92c8af8b8515e4fcc2e4c1d97432d4709a73ed98b0afa64a6cc47ddf3befb853","license-apache-2.0":"c16f8dcf1a368b83be78d826ea23de4079fe1b4469a0ab9ee20563f37ff3d44b","license-mit":"c2cfccb812fe482101a8f04597dfc5a9991a6b2748266c47ac91b6a5aae15383","readme.md":"92c8af8b8515e4fcc2e4c1d97432d4709a73ed98b0afa64a6cc47ddf3befb853","src/bindings.rs":"d8e7c0480c4af752d798b49b293eae4107a4e73f93922e8847c788c70a58b059","src/bool.rs":"2bd56877eda0a6761912dcbe5656a796cc481088afbdbd09f0d6f89dc35c0655","src/bstr.rs":"9f69a04cd6004d64964f8dfd268f3e872d530f50e4e35e82f1e434bb9a57c9a7","src/com.rs":"3111c836c9a2cabcf01b06fc65af474a1e071d9c887db178105c2b52ec78bdd5","src/error.rs":"1403d158ed3cb7c84dc3998a110d8fcccb842c22806e184d0619a05f775236cc","src/hresult.rs":"441ea1b7829e8d66ccf3cb4b98c66508e34f2d5d6eb85f2e4be85ffc910a10ea","src/lib.rs":"6944b7aaa6363b09665b4eaf6820dd82fcc130a0b97fd501c502f90848b6b0fc","src/strings.rs":"fba5cda8e1d5ce430cfff8f9195a5cc4d7f880262715469583e8ec835a51ea8a","windows-result.natvis":"bf9b0a697612a38d1edb2396c09ad136cd98a2e34bd0132c57adc6a486fe03fe"},"package":"7084dcc306f89883455a206237404d3eaf961e5bd7e0f312f7c91f57eb44167f"}

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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "windows-link"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "45e46c0661abb7180e7b9c281db115305d49ca1709ab8242adf09666d2173c65"
[[package]]
name = "windows-result"
version = "0.4.0"
dependencies = [
"windows-link",
]

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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2021"
rust-version = "1.82"
name = "windows-result"
version = "0.4.0"
build = false
autolib = false
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = "Windows error handling"
readme = "README.md"
categories = ["os::windows-apis"]
license = "MIT OR Apache-2.0"
repository = "https://github.com/microsoft/windows-rs"
[package.metadata.docs.rs]
default-target = "x86_64-pc-windows-msvc"
targets = []
[features]
default = ["std"]
std = []
[lib]
name = "windows_result"
path = "src/lib.rs"
[dependencies.windows-link]
version = "0.2.0"
default-features = false
[lints.rust]
missing_unsafe_on_extern = "warn"
[lints.rust.unexpected_cfgs]
level = "warn"
priority = 0
check-cfg = ["cfg(windows_raw_dylib, windows_slim_errors)"]

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## Windows error handling
The [windows-result](https://crates.io/crates/windows-result) crate provides efficient Windows error handling and propagation with support for Win32, COM, and WinRT APIs.
* [Getting started](https://kennykerr.ca/rust-getting-started/)
* [Samples](https://github.com/microsoft/windows-rs/tree/master/crates/samples)
* [Releases](https://github.com/microsoft/windows-rs/releases)
Start by adding the following to your Cargo.toml file:
```toml
[dependencies.windows-result]
version = "0.4"
```
Use the `HRESULT`, `Error`, and specialized `Result` types as needed:
```rust
use windows_result::*;
const S_OK: HRESULT = HRESULT(0);
const ERROR_CANCELLED: u32 = 1223;
const E_CANCELLED: HRESULT = HRESULT::from_win32(ERROR_CANCELLED);
fn main() -> Result<()> {
S_OK.ok()?;
let e = Error::new(E_CANCELLED, "test message");
assert_eq!(e.code(), E_CANCELLED);
assert_eq!(e.message(), "test message");
Ok(())
}
```

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Apache License
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21
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MIT License
Copyright (c) Microsoft Corporation.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE

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## Windows error handling
The [windows-result](https://crates.io/crates/windows-result) crate provides efficient Windows error handling and propagation with support for Win32, COM, and WinRT APIs.
* [Getting started](https://kennykerr.ca/rust-getting-started/)
* [Samples](https://github.com/microsoft/windows-rs/tree/master/crates/samples)
* [Releases](https://github.com/microsoft/windows-rs/releases)
Start by adding the following to your Cargo.toml file:
```toml
[dependencies.windows-result]
version = "0.4"
```
Use the `HRESULT`, `Error`, and specialized `Result` types as needed:
```rust
use windows_result::*;
const S_OK: HRESULT = HRESULT(0);
const ERROR_CANCELLED: u32 = 1223;
const E_CANCELLED: HRESULT = HRESULT::from_win32(ERROR_CANCELLED);
fn main() -> Result<()> {
S_OK.ok()?;
let e = Error::new(E_CANCELLED, "test message");
assert_eq!(e.code(), E_CANCELLED);
assert_eq!(e.message(), "test message");
Ok(())
}
```

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windows_link::link!("kernel32.dll" "system" fn FormatMessageW(dwflags : FORMAT_MESSAGE_OPTIONS, lpsource : *const core::ffi::c_void, dwmessageid : u32, dwlanguageid : u32, lpbuffer : PWSTR, nsize : u32, arguments : *const *const i8) -> u32);
windows_link::link!("oleaut32.dll" "system" fn GetErrorInfo(dwreserved : u32, pperrinfo : *mut * mut core::ffi::c_void) -> HRESULT);
windows_link::link!("kernel32.dll" "system" fn GetLastError() -> WIN32_ERROR);
windows_link::link!("kernel32.dll" "system" fn GetProcessHeap() -> HANDLE);
windows_link::link!("kernel32.dll" "system" fn HeapFree(hheap : HANDLE, dwflags : HEAP_FLAGS, lpmem : *const core::ffi::c_void) -> BOOL);
windows_link::link!("kernel32.dll" "system" fn LoadLibraryExA(lplibfilename : PCSTR, hfile : HANDLE, dwflags : LOAD_LIBRARY_FLAGS) -> HMODULE);
windows_link::link!("api-ms-win-core-winrt-error-l1-1-0.dll" "system" fn RoOriginateErrorW(error : HRESULT, cchmax : u32, message : PCWSTR) -> BOOL);
windows_link::link!("oleaut32.dll" "system" fn SetErrorInfo(dwreserved : u32, perrinfo : * mut core::ffi::c_void) -> HRESULT);
windows_link::link!("oleaut32.dll" "system" fn SysFreeString(bstrstring : BSTR));
windows_link::link!("oleaut32.dll" "system" fn SysStringLen(pbstr : BSTR) -> u32);
pub type BOOL = i32;
pub type BSTR = *const u16;
pub const ERROR_INVALID_DATA: WIN32_ERROR = 13u32;
pub const ERROR_NO_UNICODE_TRANSLATION: WIN32_ERROR = 1113u32;
pub const E_UNEXPECTED: HRESULT = 0x8000FFFF_u32 as _;
pub const FORMAT_MESSAGE_ALLOCATE_BUFFER: FORMAT_MESSAGE_OPTIONS = 256u32;
pub const FORMAT_MESSAGE_FROM_HMODULE: FORMAT_MESSAGE_OPTIONS = 2048u32;
pub const FORMAT_MESSAGE_FROM_SYSTEM: FORMAT_MESSAGE_OPTIONS = 4096u32;
pub const FORMAT_MESSAGE_IGNORE_INSERTS: FORMAT_MESSAGE_OPTIONS = 512u32;
pub type FORMAT_MESSAGE_OPTIONS = u32;
#[repr(C)]
#[derive(Clone, Copy)]
pub struct GUID {
pub data1: u32,
pub data2: u16,
pub data3: u16,
pub data4: [u8; 8],
}
impl GUID {
pub const fn from_u128(uuid: u128) -> Self {
Self {
data1: (uuid >> 96) as u32,
data2: (uuid >> 80 & 0xffff) as u16,
data3: (uuid >> 64 & 0xffff) as u16,
data4: (uuid as u64).to_be_bytes(),
}
}
}
pub type HANDLE = *mut core::ffi::c_void;
pub type HEAP_FLAGS = u32;
pub type HINSTANCE = *mut core::ffi::c_void;
pub type HMODULE = *mut core::ffi::c_void;
pub type HRESULT = i32;
pub const IID_IErrorInfo: GUID = GUID::from_u128(0x1cf2b120_547d_101b_8e65_08002b2bd119);
#[repr(C)]
pub struct IErrorInfo_Vtbl {
pub base__: IUnknown_Vtbl,
pub GetGUID: unsafe extern "system" fn(*mut core::ffi::c_void, *mut GUID) -> HRESULT,
pub GetSource: unsafe extern "system" fn(*mut core::ffi::c_void, *mut BSTR) -> HRESULT,
pub GetDescription: unsafe extern "system" fn(*mut core::ffi::c_void, *mut BSTR) -> HRESULT,
pub GetHelpFile: unsafe extern "system" fn(*mut core::ffi::c_void, *mut BSTR) -> HRESULT,
pub GetHelpContext: unsafe extern "system" fn(*mut core::ffi::c_void, *mut u32) -> HRESULT,
}
pub const IID_IRestrictedErrorInfo: GUID = GUID::from_u128(0x82ba7092_4c88_427d_a7bc_16dd93feb67e);
#[repr(C)]
pub struct IRestrictedErrorInfo_Vtbl {
pub base__: IUnknown_Vtbl,
pub GetErrorDetails: unsafe extern "system" fn(
*mut core::ffi::c_void,
*mut BSTR,
*mut HRESULT,
*mut BSTR,
*mut BSTR,
) -> HRESULT,
pub GetReference: unsafe extern "system" fn(*mut core::ffi::c_void, *mut BSTR) -> HRESULT,
}
pub const IID_IUnknown: GUID = GUID::from_u128(0x00000000_0000_0000_c000_000000000046);
#[repr(C)]
pub struct IUnknown_Vtbl {
pub QueryInterface: unsafe extern "system" fn(
this: *mut core::ffi::c_void,
iid: *const GUID,
interface: *mut *mut core::ffi::c_void,
) -> HRESULT,
pub AddRef: unsafe extern "system" fn(this: *mut core::ffi::c_void) -> u32,
pub Release: unsafe extern "system" fn(this: *mut core::ffi::c_void) -> u32,
}
pub type LOAD_LIBRARY_FLAGS = u32;
pub const LOAD_LIBRARY_SEARCH_DEFAULT_DIRS: LOAD_LIBRARY_FLAGS = 4096u32;
pub type PCSTR = *const u8;
pub type PCWSTR = *const u16;
pub type PWSTR = *mut u16;
pub type WIN32_ERROR = u32;

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use super::*;
/// A 32-bit value representing boolean values and returned by some functions to indicate success or failure.
#[must_use]
#[repr(transparent)]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Default)]
pub struct BOOL(pub i32);
impl BOOL {
/// Converts the [`BOOL`] to a [`prim@bool`] value.
#[inline]
pub fn as_bool(self) -> bool {
self.0 != 0
}
/// Converts the [`BOOL`] to [`Result<()>`][Result<_>].
#[inline]
pub fn ok(self) -> Result<()> {
if self.as_bool() {
Ok(())
} else {
Err(Error::from_thread())
}
}
/// Asserts that `self` is a success code.
#[inline]
#[track_caller]
pub fn unwrap(self) {
self.ok().unwrap();
}
/// Asserts that `self` is a success code using the given panic message.
#[inline]
#[track_caller]
pub fn expect(self, msg: &str) {
self.ok().expect(msg);
}
}
impl From<BOOL> for bool {
fn from(value: BOOL) -> Self {
value.as_bool()
}
}
impl From<&BOOL> for bool {
fn from(value: &BOOL) -> Self {
value.as_bool()
}
}
impl From<bool> for BOOL {
fn from(value: bool) -> Self {
if value {
Self(1)
} else {
Self(0)
}
}
}
impl From<&bool> for BOOL {
fn from(value: &bool) -> Self {
(*value).into()
}
}
impl PartialEq<bool> for BOOL {
fn eq(&self, other: &bool) -> bool {
self.as_bool() == *other
}
}
impl PartialEq<BOOL> for bool {
fn eq(&self, other: &BOOL) -> bool {
*self == other.as_bool()
}
}
impl core::ops::Not for BOOL {
type Output = Self;
fn not(self) -> Self::Output {
if self.as_bool() {
Self(0)
} else {
Self(1)
}
}
}

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use super::*;
use core::ops::Deref;
#[repr(transparent)]
pub struct BasicString(*const u16);
impl Deref for BasicString {
type Target = [u16];
fn deref(&self) -> &[u16] {
let len = if self.0.is_null() {
0
} else {
unsafe { SysStringLen(self.0) as usize }
};
if len > 0 {
unsafe { core::slice::from_raw_parts(self.0, len) }
} else {
// This ensures that if `as_ptr` is called on the slice that the resulting pointer
// will still refer to a null-terminated string.
const EMPTY: [u16; 1] = [0];
&EMPTY[..0]
}
}
}
impl Default for BasicString {
fn default() -> Self {
Self(core::ptr::null_mut())
}
}
impl Drop for BasicString {
fn drop(&mut self) {
if !self.0.is_null() {
unsafe { SysFreeString(self.0) }
}
}
}

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use super::*;
#[doc(hidden)]
#[macro_export]
macro_rules! com_call {
($vtbl:ty, $this:ident.$method:ident($($args:tt)*)) => {
((&**($this.as_raw() as *mut *mut $vtbl)).$method)($this.as_raw(), $($args)*)
}
}
#[repr(transparent)]
pub struct ComPtr(core::ptr::NonNull<core::ffi::c_void>);
impl ComPtr {
pub fn as_raw(&self) -> *mut core::ffi::c_void {
unsafe { core::mem::transmute_copy(self) }
}
pub fn cast(&self, iid: &GUID) -> Option<Self> {
let mut result = None;
unsafe {
com_call!(
IUnknown_Vtbl,
self.QueryInterface(iid, &mut result as *mut _ as _)
);
}
result
}
}
impl PartialEq for ComPtr {
fn eq(&self, other: &Self) -> bool {
self.cast(&IID_IUnknown).unwrap().0 == other.cast(&IID_IUnknown).unwrap().0
}
}
impl Eq for ComPtr {}
impl Clone for ComPtr {
fn clone(&self) -> Self {
unsafe {
com_call!(IUnknown_Vtbl, self.AddRef());
}
Self(self.0)
}
}
impl Drop for ComPtr {
fn drop(&mut self) {
unsafe {
com_call!(IUnknown_Vtbl, self.Release());
}
}
}

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vendor/windows-result/src/error.rs vendored Normal file
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use super::*;
use core::num::NonZeroI32;
#[expect(unused_imports)]
use core::mem::size_of;
/// An error object consists of both an error code and optional detailed error information for debugging.
///
/// # Extended error info and the `windows_slim_errors` configuration option
///
/// `Error` contains an [`HRESULT`] value that describes the error, as well as an optional
/// `IErrorInfo` COM object. The `IErrorInfo` object is a COM object that can provide detailed information
/// about an error, such as a text string, a `ProgID` of the originator, etc. If the error object
/// was originated in an WinRT component, then additional information such as a stack track may be
/// captured.
///
/// However, many systems based on COM do not use `IErrorInfo`. For these systems, the optional error
/// info within `Error` has no benefits, but has substantial costs because it increases the size of
/// the `Error` object, which also increases the size of `Result<T>`.
///
/// This error information can be disabled at compile time by setting `RUSTFLAGS=--cfg=windows_slim_errors`.
/// This removes the `IErrorInfo` support within the [`Error`] type, which has these benefits:
///
/// * It reduces the size of [`Error`] to 4 bytes (the size of [`HRESULT`]).
///
/// * It reduces the size of `Result<(), Error>` to 4 bytes, allowing it to be returned in a single
/// machine register.
///
/// * The `Error` (and `Result<T, Error>`) types no longer have a [`Drop`] impl. This removes the need
/// for lifetime checking and running drop code when [`Error`] and [`Result`] go out of scope. This
/// significantly reduces code size for codebase that make extensive use of [`Error`].
///
/// Of course, these benefits come with a cost; you lose extended error information for those
/// COM objects that support it.
///
/// This is controlled by a `--cfg` option rather than a Cargo feature because this compilation
/// option sets a policy that applies to an entire graph of crates. Individual crates that take a
/// dependency on the `windows-result` crate are not in a good position to decide whether they want
/// slim errors or full errors. Cargo features are meant to be additive, but specifying the size
/// and contents of `Error` is not a feature so much as a whole-program policy decision.
///
/// # References
///
/// * [`IErrorInfo`](https://learn.microsoft.com/en-us/windows/win32/api/oaidl/nn-oaidl-ierrorinfo)
#[derive(Clone)]
pub struct Error {
/// The `HRESULT` error code, but represented using [`NonZeroI32`]. [`NonZeroI32`] provides
/// a "niche" to the Rust compiler, which is a space-saving optimization. This allows the
/// compiler to use more compact representation for enum variants (such as [`Result`]) that
/// contain instances of [`Error`].
code: NonZeroI32,
/// Contains details about the error, such as error text.
info: ErrorInfo,
}
/// We remap S_OK to this error because the S_OK representation (zero) is reserved for niche
/// optimizations.
const S_EMPTY_ERROR: NonZeroI32 = const_nonzero_i32(u32::from_be_bytes(*b"S_OK") as i32);
/// Converts an HRESULT into a NonZeroI32. If the input is S_OK (zero), then this is converted to
/// S_EMPTY_ERROR. This is necessary because NonZeroI32, as the name implies, cannot represent the
/// value zero. So we remap it to a value no one should be using, during storage.
const fn const_nonzero_i32(i: i32) -> NonZeroI32 {
if let Some(nz) = NonZeroI32::new(i) {
nz
} else {
panic!();
}
}
fn nonzero_hresult(hr: HRESULT) -> NonZeroI32 {
if let Some(nz) = NonZeroI32::new(hr.0) {
nz
} else {
S_EMPTY_ERROR
}
}
impl Error {
/// Creates an error object without any failure information.
pub const fn empty() -> Self {
Self {
code: S_EMPTY_ERROR,
info: ErrorInfo::empty(),
}
}
/// Creates a new error object, capturing the stack and other information about the
/// point of failure.
pub fn new<T: AsRef<str>>(code: HRESULT, message: T) -> Self {
#[cfg(windows)]
{
let message: &str = message.as_ref();
if message.is_empty() {
Self::from_hresult(code)
} else {
ErrorInfo::originate_error(code, message);
code.into()
}
}
#[cfg(not(windows))]
{
let _ = message;
Self::from_hresult(code)
}
}
/// Creates a new error object with an error code, but without additional error information.
pub fn from_hresult(code: HRESULT) -> Self {
Self {
code: nonzero_hresult(code),
info: ErrorInfo::empty(),
}
}
/// Creates a new `Error` from the Win32 error code returned by `GetLastError()`.
pub fn from_thread() -> Self {
Self::from_hresult(HRESULT::from_thread())
}
/// The error code describing the error.
pub const fn code(&self) -> HRESULT {
if self.code.get() == S_EMPTY_ERROR.get() {
HRESULT(0)
} else {
HRESULT(self.code.get())
}
}
/// The error message describing the error.
pub fn message(&self) -> String {
if let Some(message) = self.info.message() {
return message;
}
// Otherwise fallback to a generic error code description.
self.code().message()
}
/// The error object describing the error.
#[cfg(windows)]
pub fn as_ptr(&self) -> *mut core::ffi::c_void {
self.info.as_ptr()
}
}
#[cfg(feature = "std")]
impl std::error::Error for Error {}
impl From<Error> for HRESULT {
fn from(error: Error) -> Self {
let code = error.code();
error.info.into_thread();
code
}
}
impl From<HRESULT> for Error {
fn from(code: HRESULT) -> Self {
Self {
code: nonzero_hresult(code),
info: ErrorInfo::from_thread(),
}
}
}
#[cfg(feature = "std")]
impl From<Error> for std::io::Error {
fn from(from: Error) -> Self {
Self::from_raw_os_error(from.code().0)
}
}
#[cfg(feature = "std")]
impl From<std::io::Error> for Error {
fn from(from: std::io::Error) -> Self {
match from.raw_os_error() {
Some(status) => HRESULT::from_win32(status as u32).into(),
None => HRESULT(E_UNEXPECTED).into(),
}
}
}
impl From<alloc::string::FromUtf16Error> for Error {
fn from(_: alloc::string::FromUtf16Error) -> Self {
Self::from_hresult(HRESULT::from_win32(ERROR_NO_UNICODE_TRANSLATION))
}
}
impl From<alloc::string::FromUtf8Error> for Error {
fn from(_: alloc::string::FromUtf8Error) -> Self {
Self::from_hresult(HRESULT::from_win32(ERROR_NO_UNICODE_TRANSLATION))
}
}
impl From<core::num::TryFromIntError> for Error {
fn from(_: core::num::TryFromIntError) -> Self {
Self::from_hresult(HRESULT::from_win32(ERROR_INVALID_DATA))
}
}
impl core::fmt::Debug for Error {
fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result {
let mut debug = fmt.debug_struct("Error");
debug
.field("code", &self.code())
.field("message", &self.message())
.finish()
}
}
impl core::fmt::Display for Error {
fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result {
let message = self.message();
if message.is_empty() {
core::write!(fmt, "{}", self.code())
} else {
core::write!(fmt, "{} ({})", message, self.code())
}
}
}
impl core::hash::Hash for Error {
fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
self.code.hash(state);
// We do not hash the error info.
}
}
// Equality tests only the HRESULT, not the error info (if any).
impl PartialEq for Error {
fn eq(&self, other: &Self) -> bool {
self.code == other.code
}
}
impl Eq for Error {}
impl PartialOrd for Error {
fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
Some(self.cmp(other))
}
}
impl Ord for Error {
fn cmp(&self, other: &Self) -> core::cmp::Ordering {
self.code.cmp(&other.code)
}
}
use error_info::*;
#[cfg(all(windows, not(windows_slim_errors)))]
mod error_info {
use super::*;
use crate::com::ComPtr;
/// This type stores error detail, represented by a COM `IErrorInfo` object.
///
/// # References
///
/// * [`IErrorInfo`](https://learn.microsoft.com/en-us/windows/win32/api/oaidl/nn-oaidl-ierrorinfo)
#[derive(Clone, Default)]
pub(crate) struct ErrorInfo {
pub(super) ptr: Option<ComPtr>,
}
impl ErrorInfo {
pub(crate) const fn empty() -> Self {
Self { ptr: None }
}
pub(crate) fn from_thread() -> Self {
unsafe {
let mut ptr = core::mem::MaybeUninit::zeroed();
crate::bindings::GetErrorInfo(0, ptr.as_mut_ptr() as *mut _);
Self {
ptr: ptr.assume_init(),
}
}
}
pub(crate) fn into_thread(self) {
if let Some(ptr) = self.ptr {
unsafe {
crate::bindings::SetErrorInfo(0, ptr.as_raw());
}
}
}
pub(crate) fn originate_error(code: HRESULT, message: &str) {
let message: Vec<_> = message.encode_utf16().collect();
unsafe {
RoOriginateErrorW(code.0, message.len() as u32, message.as_ptr());
}
}
pub(crate) fn message(&self) -> Option<String> {
use crate::bstr::BasicString;
let ptr = self.ptr.as_ref()?;
let mut message = BasicString::default();
// First attempt to retrieve the restricted error information.
if let Some(info) = ptr.cast(&IID_IRestrictedErrorInfo) {
let mut fallback = BasicString::default();
let mut code = 0;
unsafe {
com_call!(
IRestrictedErrorInfo_Vtbl,
info.GetErrorDetails(
&mut fallback as *mut _ as _,
&mut code,
&mut message as *mut _ as _,
&mut BasicString::default() as *mut _ as _
)
);
}
if message.is_empty() {
message = fallback
};
}
// Next attempt to retrieve the regular error information.
if message.is_empty() {
unsafe {
com_call!(
IErrorInfo_Vtbl,
ptr.GetDescription(&mut message as *mut _ as _)
);
}
}
Some(String::from_utf16_lossy(wide_trim_end(&message)))
}
pub(crate) fn as_ptr(&self) -> *mut core::ffi::c_void {
if let Some(info) = self.ptr.as_ref() {
info.as_raw()
} else {
core::ptr::null_mut()
}
}
}
unsafe impl Send for ErrorInfo {}
unsafe impl Sync for ErrorInfo {}
}
#[cfg(not(all(windows, not(windows_slim_errors))))]
mod error_info {
use super::*;
// We use this name so that the NatVis <Type> element for ErrorInfo does *not* match this type.
// This prevents the NatVis description from failing to load.
#[derive(Clone, Default)]
pub(crate) struct EmptyErrorInfo;
pub(crate) use EmptyErrorInfo as ErrorInfo;
impl EmptyErrorInfo {
pub(crate) const fn empty() -> Self {
Self
}
pub(crate) fn from_thread() -> Self {
Self
}
pub(crate) fn into_thread(self) {}
#[cfg(windows)]
pub(crate) fn originate_error(_code: HRESULT, _message: &str) {}
pub(crate) fn message(&self) -> Option<String> {
None
}
#[cfg(windows)]
pub(crate) fn as_ptr(&self) -> *mut core::ffi::c_void {
core::ptr::null_mut()
}
}
}

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use super::*;
/// An error code value returned by most COM functions.
#[repr(transparent)]
#[derive(Copy, Clone, Default, Eq, PartialEq, Ord, PartialOrd, Hash)]
#[must_use]
pub struct HRESULT(pub i32);
impl HRESULT {
/// Returns [`true`] if `self` is a success code.
#[inline]
pub const fn is_ok(self) -> bool {
self.0 >= 0
}
/// Returns [`true`] if `self` is a failure code.
#[inline]
pub const fn is_err(self) -> bool {
!self.is_ok()
}
/// Asserts that `self` is a success code.
///
/// This will invoke the [`panic!`] macro if `self` is a failure code and display
/// the [`HRESULT`] value for diagnostics.
#[inline]
#[track_caller]
pub fn unwrap(self) {
assert!(self.is_ok(), "HRESULT 0x{:X}", self.0);
}
/// Converts the [`HRESULT`] to [`Result<()>`][Result<_>].
#[inline]
pub fn ok(self) -> Result<()> {
if self.is_ok() {
Ok(())
} else {
Err(self.into())
}
}
/// Calls `op` if `self` is a success code, otherwise returns [`HRESULT`]
/// converted to [`Result<T>`].
#[inline]
pub fn map<F, T>(self, op: F) -> Result<T>
where
F: FnOnce() -> T,
{
self.ok()?;
Ok(op())
}
/// Calls `op` if `self` is a success code, otherwise returns [`HRESULT`]
/// converted to [`Result<T>`].
#[inline]
pub fn and_then<F, T>(self, op: F) -> Result<T>
where
F: FnOnce() -> Result<T>,
{
self.ok()?;
op()
}
/// The error message describing the error.
pub fn message(self) -> String {
#[cfg(windows)]
{
let mut message = HeapString::default();
let mut code = self.0;
let mut module = core::ptr::null_mut();
let mut flags = FORMAT_MESSAGE_ALLOCATE_BUFFER
| FORMAT_MESSAGE_FROM_SYSTEM
| FORMAT_MESSAGE_IGNORE_INSERTS;
unsafe {
if self.0 & 0x1000_0000 == 0x1000_0000 {
code ^= 0x1000_0000;
flags |= FORMAT_MESSAGE_FROM_HMODULE;
module = LoadLibraryExA(
c"ntdll.dll".as_ptr() as _,
core::ptr::null_mut(),
LOAD_LIBRARY_SEARCH_DEFAULT_DIRS,
);
}
let size = FormatMessageW(
flags,
module as _,
code as _,
0,
&mut message.0 as *mut _ as *mut _,
0,
core::ptr::null(),
);
if !message.0.is_null() && size > 0 {
String::from_utf16_lossy(wide_trim_end(core::slice::from_raw_parts(
message.0,
size as usize,
)))
} else {
String::default()
}
}
}
#[cfg(not(windows))]
{
return alloc::format!("0x{:08x}", self.0 as u32);
}
}
/// Creates a new `HRESULT` from the Win32 error code returned by `GetLastError()`.
pub fn from_thread() -> Self {
#[cfg(windows)]
{
let error = unsafe { GetLastError() };
Self::from_win32(error)
}
#[cfg(not(windows))]
{
unimplemented!()
}
}
/// Maps a Win32 error code to an HRESULT value.
pub const fn from_win32(error: u32) -> Self {
Self(if error as i32 <= 0 {
error
} else {
(error & 0x0000_FFFF) | (7 << 16) | 0x8000_0000
} as i32)
}
/// Maps an NT error code to an HRESULT value.
pub const fn from_nt(error: i32) -> Self {
Self(if error >= 0 {
error
} else {
error | 0x1000_0000
})
}
}
impl<T> From<Result<T>> for HRESULT {
fn from(result: Result<T>) -> Self {
if let Err(error) = result {
return error.into();
}
Self(0)
}
}
impl core::fmt::Display for HRESULT {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
f.write_fmt(format_args!("{:#010X}", self.0))
}
}
impl core::fmt::Debug for HRESULT {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
f.write_fmt(format_args!("HRESULT({self})"))
}
}

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#![doc = include_str!("../readme.md")]
#![debugger_visualizer(natvis_file = "../windows-result.natvis")]
#![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
#![cfg_attr(not(windows), expect(unused_imports))]
#![expect(
dead_code,
non_upper_case_globals,
non_snake_case,
non_camel_case_types,
clippy::upper_case_acronyms
)]
extern crate alloc;
use alloc::{string::String, vec::Vec};
mod bindings;
use bindings::*;
#[cfg(all(windows, not(windows_slim_errors)))]
mod com;
#[cfg(windows)]
mod strings;
#[cfg(windows)]
use strings::*;
#[cfg(all(windows, not(windows_slim_errors)))]
mod bstr;
mod error;
pub use error::*;
mod hresult;
pub use hresult::HRESULT;
mod bool;
pub use bool::BOOL;
/// A specialized [`Result`] type that provides Windows error information.
pub type Result<T> = core::result::Result<T, Error>;

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use super::*;
pub struct HeapString(pub *mut u16);
impl Default for HeapString {
fn default() -> Self {
Self(core::ptr::null_mut())
}
}
impl Drop for HeapString {
fn drop(&mut self) {
if !self.0.is_null() {
unsafe {
HeapFree(GetProcessHeap(), 0, self.0 as _);
}
}
}
}
pub fn wide_trim_end(mut wide: &[u16]) -> &[u16] {
while let Some(last) = wide.last() {
match last {
32 | 9..=13 => wide = &wide[..wide.len() - 1],
_ => break,
}
}
wide
}

21
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<?xml version="1.0" encoding="utf-8"?>
<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
<Type Name="windows_result::error::Error">
<Expand>
<ExpandedItem>(HRESULT)code.__0.__0,hr</ExpandedItem>
<Item Name="[code]">(HRESULT)code.__0.__0</Item>
<Item Name="[info]">info.ptr</Item>
</Expand>
</Type>
<Type Name="windows_result::hresult::HRESULT">
<DisplayString>{(HRESULT)__0}</DisplayString>
</Type>
<Type Name="windows_result::error::error_info::ErrorInfo">
<DisplayString>ErrorInfo</DisplayString>
<Expand>
<Item Name="[object]">*(void**)&amp;ptr</Item>
</Expand>
</Type>
</AutoVisualizer>