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

/* Copyright (C) 2004, 2008  Matthijs van Duin.  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, saved;
	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) {
		saved = *end;
		*end = 0;
		stash = GvHV(gv_fetchpv(name, TRUE, SVt_PVHV));
		*end = saved;
		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.
65b620dd	2	* This program is free software; you can redistribute it and/or modify
16c23894	3	* it under the same terms as Perl itself.
	4	*/
	5
	6	#include "EXTERN.h"
	7	#include "perl.h"
	8	#include "XSUB.h"
	9
bbd01306	10	static MGVTBL subname_vtbl;
16c23894	11
979516cc	12	#ifndef PERL_MAGIC_ext
	13	# define PERL_MAGIC_ext '~'
	14	#endif
	15
	16	#ifndef SvMAGIC_set
	17	#define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
	18	#endif
	19
	20
16c23894	21	MODULE = Sub::Name PACKAGE = Sub::Name
	22
	23	PROTOTYPES: DISABLE
	24
	25	void
	26	subname(name, sub)
	27	char *name
	28	SV *sub
	29	PREINIT:
	30	CV *cv = NULL;
	31	GV *gv;
	32	HV *stash = CopSTASH(PL_curcop);
	33	char s, end = NULL, saved;
fa213968	34	MAGIC *mg;
16c23894	35	PPCODE:
	36	if (!SvROK(sub) && SvGMAGICAL(sub))
	37	mg_get(sub);
	38	if (SvROK(sub))
	39	cv = (CV *) SvRV(sub);
	40	else if (SvTYPE(sub) == SVt_PVGV)
	41	cv = GvCVu(sub);
	42	else if (!SvOK(sub))
	43	croak(PL_no_usym, "a subroutine");
	44	else if (PL_op->op_private & HINT_STRICT_REFS)
65b620dd	45	croak("Can't use string (\"%.32s\") as %s ref while \"strict refs\" in use",
65b620dd	46	SvPV_nolen(sub), "a subroutine");
16c23894	47	else if ((gv = gv_fetchpv(SvPV_nolen(sub), FALSE, SVt_PVCV)))
	48	cv = GvCVu(gv);
	49	if (!cv)
	50	croak("Undefined subroutine %s", SvPV_nolen(sub));
	51	if (SvTYPE(cv) != SVt_PVCV && SvTYPE(cv) != SVt_PVFM)
	52	croak("Not a subroutine reference");
	53	for (s = name; *s++; ) {
	54	if (*s == ':' && s[-1] == ':')
	55	end = ++s;
	56	else if (*s && s[-1] == '\'')
	57	end = s;
	58	}
	59	s--;
	60	if (end) {
	61	saved = *end;
	62	*end = 0;
	63	stash = GvHV(gv_fetchpv(name, TRUE, SVt_PVHV));
	64	*end = saved;
	65	name = end;
	66	}
	67	gv = (GV *) newSV(0);
	68	gv_init(gv, stash, name, s - name, TRUE);
fa213968	69
	70	mg = SvMAGIC(cv);
	71	while (mg && mg->mg_virtual != &subname_vtbl)
	72	mg = mg->mg_moremagic;
	73	if (!mg) {
	74	Newz(702, mg, 1, MAGIC);
	75	mg->mg_moremagic = SvMAGIC(cv);
	76	mg->mg_type = PERL_MAGIC_ext;
	77	mg->mg_virtual = &subname_vtbl;
	78	SvMAGIC_set(cv, mg);
bbd01306	79	}
fa213968	80	if (mg->mg_flags & MGf_REFCOUNTED)
	81	SvREFCNT_dec(mg->mg_obj);
	82	mg->mg_flags \|= MGf_REFCOUNTED;
	83	mg->mg_obj = (SV *) gv;
5804808d	84	SvRMAGICAL_on(cv);
5804808d	85	CvANON_off(cv);
08e37985	86	#ifndef CvGV_set
16c23894	87	CvGV(cv) = gv;
08e37985	88	#else
	89	CvGV_set(cv, gv);
	90	#endif
16c23894	91	PUSHs(sub);