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use std::borrow::Cow;
use winapi::shared::winerror;
pub(crate) trait HResult<O> {
fn into_result(self) -> Result<O, Cow<'static, str>>;
fn into_device_result(self, description: &str) -> Result<O, crate::DeviceError>;
}
impl HResult<()> for i32 {
fn into_result(self) -> Result<(), Cow<'static, str>> {
if self >= 0 {
return Ok(());
}
let description = match self {
winerror::E_UNEXPECTED => "unexpected",
winerror::E_NOTIMPL => "not implemented",
winerror::E_OUTOFMEMORY => "out of memory",
winerror::E_INVALIDARG => "invalid argument",
_ => return Err(Cow::Owned(format!("0x{:X}", self as u32))),
};
Err(Cow::Borrowed(description))
}
fn into_device_result(self, description: &str) -> Result<(), crate::DeviceError> {
self.into_result().map_err(|err| {
log::error!("{} failed: {}", description, err);
if self == winerror::E_OUTOFMEMORY {
crate::DeviceError::OutOfMemory
} else {
crate::DeviceError::Lost
}
})
}
}
impl<T> HResult<T> for (T, i32) {
fn into_result(self) -> Result<T, Cow<'static, str>> {
self.1.into_result().map(|()| self.0)
}
fn into_device_result(self, description: &str) -> Result<T, crate::DeviceError> {
self.1.into_device_result(description).map(|()| self.0)
}
}
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