From 8f0b3fcc4329e278204a58fd52feabdf9e4c5681 Mon Sep 17 00:00:00 2001
From: "Paul \"LeoNerd\" Evans" <leonerd@leonerd.org.uk>
Date: Tue, 25 Oct 2022 15:37:00 +0100
Subject: Add sv_derived_from_hv() helper function

---
 universal.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'universal.c')

diff --git a/universal.c b/universal.c
index fe221dcedd..119117e818 100644
--- a/universal.c
+++ b/universal.c
@@ -188,6 +188,27 @@ Perl_sv_derived_from_pvn(pTHX_ SV *sv, const char *const name, const STRLEN len,
     return sv_derived_from_svpvn(sv, NULL, name, len, flags);
 }
 
+/*
+=for apidoc sv_derived_from_hv
+
+Exactly like L</sv_derived_from_pvn>, but takes the name string as the
+C<HvNAME> of the given HV (which would presumably represent a stash).
+
+=cut
+*/
+
+bool
+Perl_sv_derived_from_hv(pTHX_ SV *sv, HV *hv)
+{
+    PERL_ARGS_ASSERT_SV_DERIVED_FROM_HV;
+
+    const char *hvname = HvNAME(hv);
+    if(!hvname)
+        return FALSE;
+
+    return sv_derived_from_svpvn(sv, NULL, hvname, HvNAMELEN(hv), HvNAMEUTF8(hv) ? SVf_UTF8 : 0);
+}
+
 /*
 =for apidoc sv_isa_sv
 
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