[perl5.git] / xsutils.c

#include "EXTERN.h"
#define PERL_IN_XSUTILS_C
#include "perl.h"

/*
 * Contributed by Spider Boardman (spider.boardman@orb.nashua.nh.us).
 */

/* package attributes; */
void XS_attributes__warn_reserved(pTHXo_ CV *cv);
void XS_attributes_reftype(pTHXo_ CV *cv);
void XS_attributes__modify_attrs(pTHXo_ CV *cv);
void XS_attributes__guess_stash(pTHXo_ CV *cv);
void XS_attributes__fetch_attrs(pTHXo_ CV *cv);
void XS_attributes_bootstrap(pTHXo_ CV *cv);


/*
 * Note that only ${pkg}::bootstrap definitions should go here.
 * This helps keep down the start-up time, which is especially
 * relevant for users who don't invoke any features which are
 * (partially) implemented here.
 *
 * The various bootstrap definitions can take care of doing
 * package-specific newXS() calls.  Since the layout of the
 * bundled *.pm files is in a version-specific directory,
 * version checks in these bootstrap calls are optional.
 */

void
Perl_boot_core_xsutils(pTHX)
{
    char *file = __FILE__;

    newXS("attributes::bootstrap",	XS_attributes_bootstrap,	file);
}

#include "XSUB.h"

static int
modify_SV_attributes(pTHXo_ SV *sv, SV **retlist, SV **attrlist, int numattrs)
{
    SV *attr;
    char *name;
    STRLEN len;
    bool negated;
    int nret;

    for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) {
	name = SvPV(attr, len);
	if ((negated = (*name == '-')) || (*name == '+')) {
	    name++;
	    len--;
	}
	switch (SvTYPE(sv)) {
	case SVt_PVCV:
	    switch ((int)len) {
	    case 6:
		switch (*name) {
		case 'l':
#ifdef CVf_LVALUE
		    if (strEQ(name, "lvalue")) {
			if (negated)
			    CvFLAGS((CV*)sv) &= ~CVf_LVALUE;
			else
			    CvFLAGS((CV*)sv) |= CVf_LVALUE;
			continue;
		    }
#endif /* defined CVf_LVALUE */
		    if (strEQ(name, "locked")) {
			if (negated)
			    CvFLAGS((CV*)sv) &= ~CVf_LOCKED;
			else
			    CvFLAGS((CV*)sv) |= CVf_LOCKED;
			continue;
		    }
		    break;
		case 'm':
		    if (strEQ(name, "method")) {
			if (negated)
			    CvFLAGS((CV*)sv) &= ~CVf_METHOD;
			else
			    CvFLAGS((CV*)sv) |= CVf_METHOD;
			continue;
		    }
		    break;
		}
		break;
	    }
          case SVt_IV:
          case SVt_NV:
          case SVt_PV:
          case SVt_PVIV:
          case SVt_PVNV:
          case SVt_PVAV:
          case SVt_PVHV:
	    switch ((int)len) {
              case 8:
		switch (*name) {
                  case 'r':
                    if (strEQ(name, "readonly")) {
			if (negated)
			    SvREADONLY_off(sv);
			else
			    SvREADONLY_on(sv);
                        if (SvTYPE(sv) == SVt_PVAV && SvMAGIC(sv)
                            && mg_find(sv, 'I')) { /* @ISA */
                            if (negated)
                                PL_hints &= ~HINT_CT_MRESOLVE;
                            else
                                PL_hints |= HINT_CT_MRESOLVE;
                        }
			continue;
                    }
                    break;
                }
            }
	    break;
	default:
	    /* nothing, yet */
	    break;
	}
	/* anything recognized had a 'continue' above */
	*retlist++ = attr;
	nret++;
    }

    return nret;
}


/* package attributes; */

XS(XS_attributes_bootstrap)
{
    dXSARGS;
    char *file = __FILE__;

    newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, "");
    newXS("attributes::_modify_attrs",	XS_attributes__modify_attrs,	file);
    newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$");
    newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$");
    newXSproto("attributes::reftype",	XS_attributes_reftype,	file, "$");

    XSRETURN(0);
}

XS(XS_attributes__modify_attrs)
{
    dXSARGS;
    SV *rv, *sv;

    if (items < 1) {
usage:
	Perl_croak(aTHX_
		   "Usage: attributes::_modify_attrs $reference, @attributes");
    }

    rv = ST(0);
    if (!(SvOK(rv) && SvROK(rv)))
	goto usage;
    sv = SvRV(rv);
    if (items > 1)
	XSRETURN(modify_SV_attributes(aTHXo_ sv, &ST(0), &ST(1), items-1));

    XSRETURN(0);
}

XS(XS_attributes__fetch_attrs)
{
    dXSARGS;
    SV *rv, *sv;
    cv_flags_t cvflags;

    if (items != 1) {
usage:
	Perl_croak(aTHX_
		   "Usage: attributes::_fetch_attrs $reference");
    }

    rv = ST(0);
    SP -= items;
    if (!(SvOK(rv) && SvROK(rv)))
	goto usage;
    sv = SvRV(rv);

    switch (SvTYPE(sv)) {
    case SVt_PVCV:
	cvflags = CvFLAGS((CV*)sv);
	if (cvflags & CVf_LOCKED)
	    XPUSHs(sv_2mortal(newSVpvn("locked", 6)));
#ifdef CVf_LVALUE
	if (cvflags & CVf_LVALUE)
	    XPUSHs(sv_2mortal(newSVpvn("lvalue", 6)));
#endif
	if (cvflags & CVf_METHOD)
	    XPUSHs(sv_2mortal(newSVpvn("method", 6)));
	break;
    default:
	break;
    }

    PUTBACK;
}

XS(XS_attributes__guess_stash)
{
    dXSARGS;
    SV *rv, *sv;
#ifdef dXSTARGET
    dXSTARGET;
#else
    SV * TARG = sv_newmortal();
#endif

    if (items != 1) {
usage:
	Perl_croak(aTHX_
		   "Usage: attributes::_guess_stash $reference");
    }

    rv = ST(0);
    ST(0) = TARG;
    if (!(SvOK(rv) && SvROK(rv)))
	goto usage;
    sv = SvRV(rv);

    if (SvOBJECT(sv))
	sv_setpv(TARG, HvNAME(SvSTASH(sv)));
#if 0	/* this was probably a bad idea */
    else if (SvPADMY(sv))
	sv_setsv(TARG, &PL_sv_no);	/* unblessed lexical */
#endif
    else {
	HV *stash = Nullhv;
	switch (SvTYPE(sv)) {
	case SVt_PVCV:
	    if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv)) &&
			    HvNAME(GvSTASH(CvGV(sv))))
		stash = GvSTASH(CvGV(sv));
	    else if (/* !CvANON(sv) && */ CvSTASH(sv) && HvNAME(CvSTASH(sv)))
		stash = CvSTASH(sv);
	    break;
	case SVt_PVMG:
	    if (!(SvFAKE(sv) && SvTIED_mg(sv, '*')))
		break;
	    /*FALLTHROUGH*/
	case SVt_PVGV:
	    if (GvGP(sv) && GvESTASH((GV*)sv) && HvNAME(GvESTASH((GV*)sv)))
		stash = GvESTASH((GV*)sv);
	    break;
	default:
	    break;
	}
	if (stash)
	    sv_setpv(TARG, HvNAME(stash));
    }

#ifdef dXSTARGET
    SvSETMAGIC(TARG);
#endif
    XSRETURN(1);
}

XS(XS_attributes_reftype)
{
    dXSARGS;
    SV *rv, *sv;
#ifdef dXSTARGET
    dXSTARGET;
#else
    SV * TARG = sv_newmortal();
#endif

    if (items != 1) {
usage:
	Perl_croak(aTHX_
		   "Usage: attributes::reftype $reference");
    }

    rv = ST(0);
    ST(0) = TARG;
    if (SvGMAGICAL(rv))
	mg_get(rv);
    if (!(SvOK(rv) && SvROK(rv)))
	goto usage;
    sv = SvRV(rv);
    sv_setpv(TARG, sv_reftype(sv, 0));
#ifdef dXSTARGET
    SvSETMAGIC(TARG);
#endif

    XSRETURN(1);
}

XS(XS_attributes__warn_reserved)
{
    dXSARGS;
#ifdef dXSTARGET
    dXSTARGET;
#else
    SV * TARG = sv_newmortal();
#endif

    if (items != 0) {
	Perl_croak(aTHX_
		   "Usage: attributes::_warn_reserved ()");
    }

    EXTEND(SP,1);
    ST(0) = TARG;
    sv_setiv(TARG, ckWARN(WARN_RESERVED) != 0);
#ifdef dXSTARGET
    SvSETMAGIC(TARG);
#endif

    XSRETURN(1);
}
Commit	Line	Data
09bef843 SB	1	#include "EXTERN.h"
	2	#define PERL_IN_XSUTILS_C
	3	#include "perl.h"
	4
	5	/*
	6	* Contributed by Spider Boardman (spider.boardman@orb.nashua.nh.us).
	7	*/
	8
349fd7b7 GS	9	/* package attributes; */
	10	void XS_attributes__warn_reserved(pTHXo_ CV *cv);
	11	void XS_attributes_reftype(pTHXo_ CV *cv);
	12	void XS_attributes__modify_attrs(pTHXo_ CV *cv);
	13	void XS_attributes__guess_stash(pTHXo_ CV *cv);
	14	void XS_attributes__fetch_attrs(pTHXo_ CV *cv);
	15	void XS_attributes_bootstrap(pTHXo_ CV *cv);
	16
	17
	18	/*
	19	* Note that only ${pkg}::bootstrap definitions should go here.
	20	* This helps keep down the start-up time, which is especially
	21	* relevant for users who don't invoke any features which are
	22	* (partially) implemented here.
	23	*
	24	* The various bootstrap definitions can take care of doing
	25	* package-specific newXS() calls. Since the layout of the
6a34af38	26	* bundled *.pm files is in a version-specific directory,
349fd7b7 GS	27	* version checks in these bootstrap calls are optional.
	28	*/
	29
	30	void
	31	Perl_boot_core_xsutils(pTHX)
	32	{
	33	char *file = __FILE__;
	34
	35	newXS("attributes::bootstrap", XS_attributes_bootstrap, file);
	36	}
	37
349fd7b7 GS	38	#include "XSUB.h"
	39
	40	static int
	41	modify_SV_attributes(pTHXo_ SV sv, SV retlist, SV *attrlist, int numattrs)
09bef843 SB	42	{
	43	SV *attr;
	44	char *name;
	45	STRLEN len;
	46	bool negated;
	47	int nret;
	48
	49	for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) {
	50	name = SvPV(attr, len);
4f470f63	51	if ((negated = (name == '-')) \|\| (name == '+')) {
09bef843 SB	52	name++;
	53	len--;
	54	}
	55	switch (SvTYPE(sv)) {
	56	case SVt_PVCV:
	57	switch ((int)len) {
	58	case 6:
	59	switch (*name) {
	60	case 'l':
	61	#ifdef CVf_LVALUE
	62	if (strEQ(name, "lvalue")) {
	63	if (negated)
	64	CvFLAGS((CV*)sv) &= ~CVf_LVALUE;
	65	else
	66	CvFLAGS((CV*)sv) \|= CVf_LVALUE;
	67	continue;
	68	}
	69	#endif /* defined CVf_LVALUE */
	70	if (strEQ(name, "locked")) {
	71	if (negated)
	72	CvFLAGS((CV*)sv) &= ~CVf_LOCKED;
	73	else
	74	CvFLAGS((CV*)sv) \|= CVf_LOCKED;
	75	continue;
	76	}
	77	break;
	78	case 'm':
	79	if (strEQ(name, "method")) {
	80	if (negated)
	81	CvFLAGS((CV*)sv) &= ~CVf_METHOD;
	82	else
	83	CvFLAGS((CV*)sv) \|= CVf_METHOD;
	84	continue;
	85	}
	86	break;
	87	}
	88	break;
	89	}
4f470f63 DM	90	case SVt_IV:
	91	case SVt_NV:
	92	case SVt_PV:
	93	case SVt_PVIV:
	94	case SVt_PVNV:
	95	case SVt_PVAV:
	96	case SVt_PVHV:
	97	switch ((int)len) {
	98	case 8:
	99	switch (*name) {
	100	case 'r':
	101	if (strEQ(name, "readonly")) {
	102	if (negated)
	103	SvREADONLY_off(sv);
	104	else
	105	SvREADONLY_on(sv);
	106	if (SvTYPE(sv) == SVt_PVAV && SvMAGIC(sv)
	107	&& mg_find(sv, 'I')) { /* @ISA */
	108	if (negated)
	109	PL_hints &= ~HINT_CT_MRESOLVE;
	110	else
	111	PL_hints \|= HINT_CT_MRESOLVE;
	112	}
	113	continue;
	114	}
	115	break;
	116	}
	117	}
09bef843 SB	118	break;
	119	default:
	120	/* nothing, yet */
	121	break;
	122	}
	123	/* anything recognized had a 'continue' above */
	124	*retlist++ = attr;
	125	nret++;
	126	}
	127
	128	return nret;
	129	}
	130
	131
09bef843 SB	132
	133	/* package attributes; */
	134
	135	XS(XS_attributes_bootstrap)
	136	{
	137	dXSARGS;
	138	char *file = __FILE__;
	139
	140	newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, "");
	141	newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file);
	142	newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$");
	143	newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$");
	144	newXSproto("attributes::reftype", XS_attributes_reftype, file, "$");
	145
	146	XSRETURN(0);
	147	}
	148
	149	XS(XS_attributes__modify_attrs)
	150	{
	151	dXSARGS;
	152	SV rv, sv;
	153
	154	if (items < 1) {
	155	usage:
	156	Perl_croak(aTHX_
	157	"Usage: attributes::_modify_attrs $reference, @attributes");
	158	}
	159
	160	rv = ST(0);
	161	if (!(SvOK(rv) && SvROK(rv)))
	162	goto usage;
	163	sv = SvRV(rv);
	164	if (items > 1)
349fd7b7	165	XSRETURN(modify_SV_attributes(aTHXo_ sv, &ST(0), &ST(1), items-1));
09bef843 SB	166
	167	XSRETURN(0);
	168	}
	169
	170	XS(XS_attributes__fetch_attrs)
	171	{
	172	dXSARGS;
	173	SV rv, sv;
	174	cv_flags_t cvflags;
	175
	176	if (items != 1) {
	177	usage:
	178	Perl_croak(aTHX_
	179	"Usage: attributes::_fetch_attrs $reference");
	180	}
	181
	182	rv = ST(0);
	183	SP -= items;
	184	if (!(SvOK(rv) && SvROK(rv)))
	185	goto usage;
	186	sv = SvRV(rv);
	187
	188	switch (SvTYPE(sv)) {
	189	case SVt_PVCV:
	190	cvflags = CvFLAGS((CV*)sv);
	191	if (cvflags & CVf_LOCKED)
	192	XPUSHs(sv_2mortal(newSVpvn("locked", 6)));
	193	#ifdef CVf_LVALUE
	194	if (cvflags & CVf_LVALUE)
	195	XPUSHs(sv_2mortal(newSVpvn("lvalue", 6)));
	196	#endif
	197	if (cvflags & CVf_METHOD)
	198	XPUSHs(sv_2mortal(newSVpvn("method", 6)));
	199	break;
	200	default:
	201	break;
	202	}
	203
	204	PUTBACK;
	205	}
	206
	207	XS(XS_attributes__guess_stash)
	208	{
	209	dXSARGS;
	210	SV rv, sv;
	211	#ifdef dXSTARGET
	212	dXSTARGET;
	213	#else
	214	SV * TARG = sv_newmortal();
	215	#endif
	216
	217	if (items != 1) {
	218	usage:
	219	Perl_croak(aTHX_
	220	"Usage: attributes::_guess_stash $reference");
	221	}
	222
	223	rv = ST(0);
	224	ST(0) = TARG;
	225	if (!(SvOK(rv) && SvROK(rv)))
	226	goto usage;
	227	sv = SvRV(rv);
	228
	229	if (SvOBJECT(sv))
230	sv_setpv(TARG, HvNAME(SvSTASH(sv)));
231	#if 0 /* this was probably a bad idea */
232	else if (SvPADMY(sv))
233	sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */
234	#endif
235	else {
236	HV *stash = Nullhv;
237	switch (SvTYPE(sv)) {
238	case SVt_PVCV:
239	if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv)) &&
240	HvNAME(GvSTASH(CvGV(sv))))
241	stash = GvSTASH(CvGV(sv));
242	else if (/* !CvANON(sv) && */ CvSTASH(sv) && HvNAME(CvSTASH(sv)))
243	stash = CvSTASH(sv);
244	break;
245	case SVt_PVMG:
246	if (!(SvFAKE(sv) && SvTIED_mg(sv, '*')))
247	break;
248	/FALLTHROUGH/
249	case SVt_PVGV:
250	if (GvGP(sv) && GvESTASH((GV)sv) && HvNAME(GvESTASH((GV)sv)))
251	stash = GvESTASH((GV*)sv);
252	break;
253	default:
254	break;
255	}
256	if (stash)
257	sv_setpv(TARG, HvNAME(stash));
258	}
259
260	#ifdef dXSTARGET
261	SvSETMAGIC(TARG);
262	#endif
263	XSRETURN(1);
264	}
265
266	XS(XS_attributes_reftype)
267	{
268	dXSARGS;
269	SV rv, sv;
270	#ifdef dXSTARGET
271	dXSTARGET;
272	#else
273	SV * TARG = sv_newmortal();
274	#endif
275
276	if (items != 1) {
277	usage:
278	Perl_croak(aTHX_
279	"Usage: attributes::reftype $reference");
280	}
281
282	rv = ST(0);
283	ST(0) = TARG;
4694d0ea GS	284	if (SvGMAGICAL(rv))
4694d0ea GS	285	mg_get(rv);
121e869f	286	if (!(SvOK(rv) && SvROK(rv)))
09bef843 SB	287	goto usage;
	288	sv = SvRV(rv);
	289	sv_setpv(TARG, sv_reftype(sv, 0));
	290	#ifdef dXSTARGET
	291	SvSETMAGIC(TARG);
	292	#endif
	293
	294	XSRETURN(1);
	295	}
	296
	297	XS(XS_attributes__warn_reserved)
	298	{
	299	dXSARGS;
09bef843 SB	300	#ifdef dXSTARGET
	301	dXSTARGET;
	302	#else
	303	SV * TARG = sv_newmortal();
	304	#endif
	305
	306	if (items != 0) {
	307	Perl_croak(aTHX_
	308	"Usage: attributes::_warn_reserved ()");
	309	}
	310
	311	EXTEND(SP,1);
	312	ST(0) = TARG;
	313	sv_setiv(TARG, ckWARN(WARN_RESERVED) != 0);
	314	#ifdef dXSTARGET
	315	SvSETMAGIC(TARG);
	316	#endif
	317
	318	XSRETURN(1);
	319	}
	320