1 files changed, 130 insertions, 0 deletions
diff --git a/Name.xs b/Name.xs
new file mode 100644
index 0000000..312485f
--- /dev/null
+++ b/Name.xs
@@ -0,0 +1,130 @@
+/* Copyright (C) 2004, 2008  Matthijs van Duin.  All rights reserved.
+ * Copyright (C) 2014, cPanel Inc.  All rights reserved.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the same terms as Perl itself.
+ */
+
+#include "EXTERN.h"
+#include "perl.h"
+#include "XSUB.h"
+#include "ppport.h"
+
+static MGVTBL subname_vtbl;
+
+#ifndef PERL_MAGIC_ext
+# define PERL_MAGIC_ext '~'
+#endif
+
+#ifndef SvMAGIC_set
+#define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
+#endif
+
+#ifndef Newxz
+#define Newxz(ptr, num, type)	Newz(0, ptr, num, type)
+#endif
+
+MODULE = Sub::Name  PACKAGE = Sub::Name
+
+PROTOTYPES: DISABLE
+
+void
+subname(name, sub)
+	char *name
+	SV *sub
+    PREINIT:
+	CV *cv = NULL;
+	GV *gv;
+	HV *stash = CopSTASH(PL_curcop);
+	char *s, *end = NULL;
+	MAGIC *mg;
+    PPCODE:
+	if (!SvROK(sub) && SvGMAGICAL(sub))
+		mg_get(sub);
+	if (SvROK(sub))
+		cv = (CV *) SvRV(sub);
+	else if (SvTYPE(sub) == SVt_PVGV)
+		cv = GvCVu(sub);
+	else if (!SvOK(sub))
+		croak(PL_no_usym, "a subroutine");
+	else if (PL_op->op_private & HINT_STRICT_REFS)
+		croak("Can't use string (\"%.32s\") as %s ref while \"strict refs\" in use",
+		      SvPV_nolen(sub), "a subroutine");
+	else if ((gv = gv_fetchpv(SvPV_nolen(sub), FALSE, SVt_PVCV)))
+		cv = GvCVu(gv);
+	if (!cv)
+		croak("Undefined subroutine %s", SvPV_nolen(sub));
+	if (SvTYPE(cv) != SVt_PVCV && SvTYPE(cv) != SVt_PVFM)
+		croak("Not a subroutine reference");
+	for (s = name; *s++; ) {
+		if (*s == ':' && s[-1] == ':')
+			end = ++s;
+		else if (*s && s[-1] == '\'')
+			end = s;
+	}
+	s--;
+        if (end) {
+		char *namepv = savepvn(name, end - name);
+		stash = GvHV(gv_fetchpv(namepv, TRUE, SVt_PVHV));
+		Safefree(namepv);
+                name = end;
+        }
+
+	/* under debugger, provide information about sub location */
+	if (PL_DBsub && CvGV(cv)) {
+		HV *hv = GvHV(PL_DBsub);
+		SV** old_data;
+
+		char* new_pkg = HvNAME(stash);
+
+		char* old_name = GvNAME( CvGV(cv) );
+		char* old_pkg = HvNAME( GvSTASH(CvGV(cv)) );
+
+		int old_len = strlen(old_name) + strlen(old_pkg);
+		int new_len = strlen(name) + strlen(new_pkg);
+
+		char* full_name;
+		Newxz(full_name, (old_len > new_len ? old_len : new_len) + 3, char);
+
+		strcat(full_name, old_pkg);
+		strcat(full_name, "::");
+		strcat(full_name, old_name);
+
+		old_data = hv_fetch(hv, full_name, strlen(full_name), 0);
+
+		if (old_data) {
+			strcpy(full_name, new_pkg);
+			strcat(full_name, "::");
+			strcat(full_name, name);
+
+			SvREFCNT_inc(*old_data);
+			if (!hv_store(hv, full_name, strlen(full_name), *old_data, 0))
+				SvREFCNT_dec(*old_data);
+		}
+		Safefree(full_name);
+	}
+
+	gv = (GV *) newSV(0);
+	gv_init(gv, stash, name, s - name, TRUE);
+
+	mg = SvMAGIC(cv);
+	while (mg && mg->mg_virtual != &subname_vtbl)
+		mg = mg->mg_moremagic;
+	if (!mg) {
+		Newxz(mg, 1, MAGIC);
+		mg->mg_moremagic = SvMAGIC(cv);
+		mg->mg_type = PERL_MAGIC_ext;
+		mg->mg_virtual = &subname_vtbl;
+		SvMAGIC_set(cv, mg);
+	}
+	if (mg->mg_flags & MGf_REFCOUNTED)
+		SvREFCNT_dec(mg->mg_obj);
+	mg->mg_flags |= MGf_REFCOUNTED;
+	mg->mg_obj = (SV *) gv;
+	SvRMAGICAL_on(cv);
+	CvANON_off(cv);
+#ifndef CvGV_set
+	CvGV(cv) = gv;
+#else
+	CvGV_set(cv, gv);
+#endif
+	PUSHs(sub);