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use anyhow::Error;
use std::cell::RefCell;
use std::{ptr, slice};
thread_local! {
static LAST_ERROR: RefCell<Option<Error>> = RefCell::new(None);
}
pub fn set_last_error(err: Error) {
LAST_ERROR.with(|prev| {
*prev.borrow_mut() = Some(err);
});
}
pub fn take_last_error() -> Option<Error> {
LAST_ERROR.with(|prev| prev.borrow_mut().take())
}
pub fn clear_last_error() {
let _ = take_last_error();
}
#[no_mangle]
pub extern "C" fn linicon_have_last_error() -> libc::c_int {
LAST_ERROR.with(|prev| match *prev.borrow() {
Some(_) => 1,
None => 0,
})
}
#[no_mangle]
pub extern "C" fn linicon_last_error_length() -> libc::c_int {
LAST_ERROR.with(|prev| match *prev.borrow() {
Some(ref err) => err.to_string().len() as libc::c_int + 1,
None => 0,
})
}
#[no_mangle]
pub unsafe extern "C" fn linicon_last_error_message(
buffer: *mut libc::c_char,
length: libc::c_int,
) -> libc::c_int {
if buffer.is_null() {
return -1;
}
let last_error = match take_last_error() {
Some(err) => err,
None => return 0,
};
let error_message = last_error.to_string();
let buffer = slice::from_raw_parts_mut(buffer as *mut u8, length as usize);
if error_message.len() >= buffer.len() {
return -1;
}
ptr::copy_nonoverlapping(
error_message.as_ptr(),
buffer.as_mut_ptr(),
error_message.len(),
);
buffer[error_message.len()] = b'\0';
error_message.len() as libc::c_int
}