Rewrite zero in XS

[perl/modules/Sub-Nary.git] / Nary.xs

diff --git a/Nary.xs b/Nary.xs
index 63f8cab646f7da48fb21ae1e2ef74a06f0bd6eda..2415760185f879bcddfba0c20c1ade5d93ab449f 100644 (file)
--- a/Nary.xs
+++ b/Nary.xs
@@ -33,6 +33,23 @@ CODE:
  ST(0) = sv_2mortal(newSVuv(o == NULL));
  XSRETURN(1);
 
+void
+zero(SV *sv)
+PROTOTYPE: $
+PREINIT:
+ HV *hv;
+ IV res;
+CODE:
+ if (!SvOK(sv))
+  XSRETURN_IV(1);
+ if (!SvROK(sv)) {
+  res = SvNOK(sv) ? SvNV(sv) == 0.0 : SvUV(sv) == 0;
+  XSRETURN_IV(res);
+ }
+ hv = (HV *) SvRV(sv);
+ res = hv_exists(hv, "0", 1) && hv_iterinit(hv) == 1;
+ XSRETURN_IV(res);
+
 void
 count(SV *sv)
 PROTOTYPE: $