use foreign_types::ForeignType;
use std::error::Error as StdError;
use std::fmt;
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
pub enum Error {
ObjectCreationError,
MissingData,
InvalidString,
}
impl Error {
#[inline]
pub(crate) unsafe fn if_null<T>(handle: *mut <T as ForeignType>::CType) -> LCMSResult<T> where T: ForeignType {
if !handle.is_null() {
Ok(T::from_ptr(handle))
} else {
Err(Error::ObjectCreationError)
}
}
}
pub type LCMSResult<T> = Result<T, Error>;
impl fmt::Display for Error {
#[cold]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match *self {
Error::ObjectCreationError => "Could not create the object.\nThe reason is not known, but it's usually caused by wrong input parameters.",
Error::InvalidString => "String is not valid. Contains unsupported characters or is too long.",
Error::MissingData => "Requested data is empty or does not exist.",
})
}
}
impl StdError for Error {
}