Witch of Git - ivy/blob - rt/src/int.rs

   1 use crate::{Obj, ObjTag};
   2 use std::sync::atomic::AtomicU32;
   3
   4 #[repr(C)]
   5 pub struct ObjInt {
   6     tag: ObjTag,
   7     _pad: [u8; 3],
   8     rc: AtomicU32,
   9     value: i64,
  10 }
  11
  12 #[no_mangle]
  13 pub unsafe extern "C" fn ivy_check_int(obj: Obj) {
  14     if obj.tag() != Some(ObjTag::Int) {
  15         panic!(
  16             "ivy_check_int called with non-integer object {:016x}.",
  17             obj.int
  18         );
  19     }
  20 }
  21
  22 // This should probably be a macro rather than a call?
  23 // But it might be good to have it for completeness.
  24 // Or maybe it's valuable if we want to support big integers.
  25 #[no_mangle]
  26 pub unsafe extern "C" fn ivy_make_int(value: i64) -> Obj {
  27     // @TODO: Handle 64 bit values rather than 63 bit integers
  28     Obj { int: value << 1 | 1 }
  29 }