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use rustc_span::Symbol;
use rustc_target::spec::abi::Abi;

use crate::*;

pub fn is_dyn_sym(_name: &str) -> bool {
    false
}

impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
    fn emulate_foreign_item_inner(
        &mut self,
        link_name: Symbol,
        abi: Abi,
        args: &[OpTy<'tcx>],
        dest: &MPlaceTy<'tcx>,
    ) -> InterpResult<'tcx, EmulateItemResult> {
        let this = self.eval_context_mut();
        match link_name.as_str() {
            // Miscellaneous
            "__errno" => {
                let [] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
                let errno_place = this.last_error_place()?;
                this.write_scalar(errno_place.to_ref(this).to_scalar(), dest)?;
            }

            _ => return Ok(EmulateItemResult::NotSupported),
        }
        Ok(EmulateItemResult::NeedsReturn)
    }
}