Rename S_stashpvn to S_gv_stashpvn_internal and add to embed.fnc

S_stashpvn was not added to embed.fnc properly, and is named contrary
to general expectations of the Perl internals.

This fixes that, there should be no other functional differences.

Author: demerphq

embed.fnc

@@ -548,6 +548,9 @@ px	|GV *	|gv_override	|NN const char * const name \
 XMpd	|void	|gv_try_downgrade|NN GV* gv
 Apd	|HV*	|gv_stashpv	|NN const char* name|I32 flags
 Apd	|HV*	|gv_stashpvn	|NN const char* name|U32 namelen|I32 flags
+#if defined(PERL_IN_GV_C)
+i	|HV*	|gv_stashpvn_internal|NN const char* name|U32 namelen|I32 flags
+#endif
 Apd	|HV*	|gv_stashsv	|NN SV* sv|I32 flags
 Apd	|void	|hv_clear	|NULLOK HV *hv
 : used in SAVEHINTS() and op.c

embed.h

@@ -1439,6 +1439,7 @@
 #define gv_is_in_main(a,b,c)	S_gv_is_in_main(aTHX_ a,b,c)
 #define gv_magicalize(a,b,c,d,e,f)	S_gv_magicalize(aTHX_ a,b,c,d,e,f)
 #define gv_magicalize_isa(a)	S_gv_magicalize_isa(aTHX_ a)
+#define gv_stashpvn_internal(a,b,c)	S_gv_stashpvn_internal(aTHX_ a,b,c)
 #define maybe_multimagic_gv(a,b,c)	S_maybe_multimagic_gv(aTHX_ a,b,c)
 #define parse_gv_stash_name(a,b,c,d,e,f,g,h)	S_parse_gv_stash_name(aTHX_ a,b,c,d,e,f,g,h)
 #define require_tie_mod(a,b,c,d,e)	S_require_tie_mod(aTHX_ a,b,c,d,e)

gv.c

@@ -1316,16 +1316,24 @@ The most important of which are probably GV_ADD and SVf_UTF8.
 =cut
 */
 
+/*
+gv_stashpvn_internal
+
+Perform the internal bits of gv_stashsvpvn_cached. You could think of this
+as being one half of the logic. Not to be called except from gv_stashsvpvn_cached().
+
+*/
+
 PERL_STATIC_INLINE HV*
-S_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags)
+S_gv_stashpvn_internal(pTHX_ const char *name, U32 namelen, I32 flags)
 {
     char smallbuf[128];
     char *tmpbuf;
     HV *stash;
     GV *tmpgv;
     U32 tmplen = namelen + 2;
 
-    PERL_ARGS_ASSERT_GV_STASHPVN;
+    PERL_ARGS_ASSERT_GV_STASHPVN_INTERNAL;
 
     if (tmplen <= sizeof smallbuf)
 	tmpbuf = smallbuf;
@@ -1365,10 +1373,11 @@ Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags)
     if (he) return INT2PTR(HV*,SvIVX(HeVAL(he)));
     else if (flags & GV_CACHE_ONLY) return NULL;
 
-    stash = S_stashpvn(aTHX_ name, namelen, flags);
+    stash = gv_stashpvn_internal(name, namelen, flags);
+
     if (stash && namelen) {
         SV* const ref = newSViv(PTR2IV(stash));
-        hv_store(PL_stashcache, name,
+        (void)hv_store(PL_stashcache, name,
             (flags & SVf_UTF8) ? -(I32)namelen : (I32)namelen, ref, 0);
     }
     return stash;

proto.h

@@ -5907,6 +5907,11 @@ STATIC void	S_gv_magicalize_isa(pTHX_ GV *gv)
 #define PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA	\
 	assert(gv)
 
+PERL_STATIC_INLINE HV*	S_gv_stashpvn_internal(pTHX_ const char* name, U32 namelen, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+#define PERL_ARGS_ASSERT_GV_STASHPVN_INTERNAL	\
+	assert(name)
+
 STATIC void	S_maybe_multimagic_gv(pTHX_ GV *gv, const char *name, const svtype sv_type)
 			__attribute__nonnull__(pTHX_1)
 			__attribute__nonnull__(pTHX_2);