[p5sagit/Sub-Name.git] / Name.xs

/* 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"

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


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) {
		stash = GvHV(gv_fetchpv(savepvn(name, end - name), TRUE, SVt_PVHV));
                name = end;
        }
	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) {
		Newz(702, 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);
Commit	Line	Data
979516cc	1	/* Copyright (C) 2004, 2008 Matthijs van Duin. All rights reserved.
24f50a79	2	* Copyright (C) 2014, cPanel Inc. All rights reserved.
65b620dd	3	* This program is free software; you can redistribute it and/or modify
16c23894	4	* it under the same terms as Perl itself.
	5	*/
	6
	7	#include "EXTERN.h"
	8	#include "perl.h"
	9	#include "XSUB.h"
	10
bbd01306	11	static MGVTBL subname_vtbl;
16c23894	12
979516cc	13	#ifndef PERL_MAGIC_ext
	14	# define PERL_MAGIC_ext '~'
	15	#endif
	16
	17	#ifndef SvMAGIC_set
	18	#define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
	19	#endif
	20
	21
16c23894	22	MODULE = Sub::Name PACKAGE = Sub::Name
	23
	24	PROTOTYPES: DISABLE
	25
	26	void
	27	subname(name, sub)
	28	char *name
	29	SV *sub
	30	PREINIT:
	31	CV *cv = NULL;
	32	GV *gv;
	33	HV *stash = CopSTASH(PL_curcop);
24f50a79	34	char s, end = NULL;
fa213968	35	MAGIC *mg;
16c23894	36	PPCODE:
	37	if (!SvROK(sub) && SvGMAGICAL(sub))
	38	mg_get(sub);
	39	if (SvROK(sub))
	40	cv = (CV *) SvRV(sub);
	41	else if (SvTYPE(sub) == SVt_PVGV)
	42	cv = GvCVu(sub);
	43	else if (!SvOK(sub))
	44	croak(PL_no_usym, "a subroutine");
	45	else if (PL_op->op_private & HINT_STRICT_REFS)
65b620dd	46	croak("Can't use string (\"%.32s\") as %s ref while \"strict refs\" in use",
65b620dd	47	SvPV_nolen(sub), "a subroutine");
16c23894	48	else if ((gv = gv_fetchpv(SvPV_nolen(sub), FALSE, SVt_PVCV)))
	49	cv = GvCVu(gv);
	50	if (!cv)
	51	croak("Undefined subroutine %s", SvPV_nolen(sub));
	52	if (SvTYPE(cv) != SVt_PVCV && SvTYPE(cv) != SVt_PVFM)
	53	croak("Not a subroutine reference");
	54	for (s = name; *s++; ) {
	55	if (*s == ':' && s[-1] == ':')
	56	end = ++s;
	57	else if (*s && s[-1] == '\'')
	58	end = s;
	59	}
	60	s--;
24f50a79	61	if (end) {
	62	stash = GvHV(gv_fetchpv(savepvn(name, end - name), TRUE, SVt_PVHV));
	63	name = end;
	64	}
16c23894	65	gv = (GV *) newSV(0);
16c23894	66	gv_init(gv, stash, name, s - name, TRUE);
fa213968	67
	68	mg = SvMAGIC(cv);
	69	while (mg && mg->mg_virtual != &subname_vtbl)
	70	mg = mg->mg_moremagic;
	71	if (!mg) {
	72	Newz(702, mg, 1, MAGIC);
	73	mg->mg_moremagic = SvMAGIC(cv);
	74	mg->mg_type = PERL_MAGIC_ext;
	75	mg->mg_virtual = &subname_vtbl;
	76	SvMAGIC_set(cv, mg);
bbd01306	77	}
fa213968	78	if (mg->mg_flags & MGf_REFCOUNTED)
	79	SvREFCNT_dec(mg->mg_obj);
	80	mg->mg_flags \|= MGf_REFCOUNTED;
	81	mg->mg_obj = (SV *) gv;
5804808d	82	SvRMAGICAL_on(cv);
5804808d	83	CvANON_off(cv);
08e37985	84	#ifndef CvGV_set
16c23894	85	CvGV(cv) = gv;
08e37985	86	#else
	87	CvGV_set(cv, gv);
	88	#endif
16c23894	89	PUSHs(sub);