[gitmo/Mouse.git] / xs-src / MouseAccessor.xs

#include "mouse.h"

#define CHECK_INSTANCE(instance) STMT_START{                           \
        assert(instance);                                              \
        if(!(SvROK(instance) && SvTYPE(SvRV(instance)) == SVt_PVHV)){  \
            croak("Invalid object instance: '%"SVf"'", instance);      \
        }                                                              \
    } STMT_END


#define MOUSE_mg_attribute(mg) MOUSE_xa_attribute(MOUSE_mg_xa(mg))

static MGVTBL mouse_accessor_vtbl; /* MAGIC identity */

#define dMOUSE_self  SV* const self = mouse_accessor_get_self(aTHX_ ax, items, cv)

STATIC_INLINE SV*
mouse_accessor_get_self(pTHX_ I32 const ax, I32 const items, CV* const cv) {
    if(items < 1){
        croak("Too few arguments for %s", GvNAME(CvGV(cv)));
    }
    /* NOTE: If self has GETMAGIC, $self->accessor will invoke GETMAGIC
     *       before calling methods, so SvGETMAGIC(self) is not required here.
     */
    return ST(0);
}


CV*
mouse_accessor_generate(pTHX_ SV* const attr, XSUBADDR_t const accessor_impl){
    AV* const xa = mouse_get_xa(aTHX_ attr);
    CV* xsub;
    MAGIC* mg;

    xsub = newXS(NULL, accessor_impl, __FILE__);
    sv_2mortal((SV*)xsub);

    mg = sv_magicext((SV*)xsub, MOUSE_xa_slot(xa),
        PERL_MAGIC_ext, &mouse_accessor_vtbl, (char*)xa, HEf_SVKEY);

    MOUSE_mg_flags(mg) = (U16)MOUSE_xa_flags(xa);

    /* NOTE:
     * although we use MAGIC for gc, we also store mg to
     * CvXSUBANY for efficiency (gfx)
     */
    CvXSUBANY(xsub).any_ptr = (void*)mg;

    return xsub;
}


/* pushes return values, does auto-deref if needed */
static void
mouse_push_values(pTHX_ SV* const value, U16 const flags){
    dSP;

    assert( flags & MOUSEf_ATTR_SHOULD_AUTO_DEREF && GIMME_V == G_ARRAY );

    if(!(value && SvOK(value))){
        return;
    }

    if(flags & MOUSEf_TC_IS_ARRAYREF){
        AV* av;
        I32 len;
        I32 i;

        if(!IsArrayRef(value)){
            croak("Mouse-panic: Not an ARRAY reference");
        }

        av  = (AV*)SvRV(value);
        len = av_len(av) + 1;
        EXTEND(SP, len);
        for(i = 0; i < len; i++){
            SV** const svp = av_fetch(av, i, FALSE);
            PUSHs(svp ? *svp : &PL_sv_undef);
        }
    }
    else{
        HV* hv;
        HE* he;

        assert(flags & MOUSEf_TC_IS_HASHREF);

        if(!IsHashRef(value)){
            croak("Mouse-panic: Not a HASH reference");
        }

        hv = (HV*)SvRV(value);
        hv_iterinit(hv);
        while((he = hv_iternext(hv))){
            EXTEND(SP, 2);
            PUSHs(hv_iterkeysv(he));
            PUSHs(hv_iterval(hv, he));
        }
    }

    PUTBACK;
}

STATIC_INLINE void
mouse_push_value(pTHX_ SV* const value, U16 const flags) {
    if(flags & MOUSEf_ATTR_SHOULD_AUTO_DEREF && GIMME_V == G_ARRAY){
        mouse_push_values(aTHX_ value, flags);
    }
    else{
        dSP;
        XPUSHs(value ? value : &PL_sv_undef);
        PUTBACK;
    }
}

static void
mouse_attr_get(pTHX_ SV* const self, MAGIC* const mg){
    U16 const flags = MOUSE_mg_flags(mg);
    SV* value;

    value = get_slot(self, MOUSE_mg_slot(mg));

    /* check_lazy */
    if( !value && flags & MOUSEf_ATTR_IS_LAZY ){
        value = mouse_xa_set_default(aTHX_ MOUSE_mg_xa(mg), self);
    }

    mouse_push_value(aTHX_ value, flags);
}

static void
mouse_attr_set(pTHX_ SV* const self, MAGIC* const mg, SV* value){
    U16 const flags = MOUSE_mg_flags(mg);
    SV* const slot  = MOUSE_mg_slot(mg);

    if(flags & MOUSEf_ATTR_HAS_TC){
        value = mouse_xa_apply_type_constraint(aTHX_ MOUSE_mg_xa(mg), value, flags);
    }

    value = set_slot(self, slot, value);

    if(flags & MOUSEf_ATTR_IS_WEAK_REF){
        weaken_slot(self, slot);
    }

    if(flags & MOUSEf_ATTR_HAS_TRIGGER){
        SV* const trigger = mcall0s(MOUSE_mg_attribute(mg), "trigger");
        dSP;

        /* NOTE: triggers can remove value, so
                 value must be copied here,
                 revealed by Net::Google::DataAPI (DANJOU).
         */
        value = sv_mortalcopy(value);

        PUSHMARK(SP);
        EXTEND(SP, 2);
        PUSHs(self);
        PUSHs(value);

        PUTBACK;
        call_sv_safe(trigger, G_VOID | G_DISCARD);
        /* need not SPAGAIN */

        assert(SvTYPE(value) != SVTYPEMASK);
    }

    mouse_push_value(aTHX_ value, flags);
}

XS(XS_Mouse_accessor)
{
    dVAR; dXSARGS;
    dMOUSE_self;
    MAGIC* const mg = (MAGIC*)XSANY.any_ptr;

    SP -= items; /* PPCODE */
    PUTBACK;

    if(items == 1){ /* reader */
        mouse_attr_get(aTHX_ self, mg);
    }
    else if (items == 2){ /* writer */
        mouse_attr_set(aTHX_ self, mg, ST(1));
    }
    else{
        mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
            "Expected exactly one or two argument for an accessor of %"SVf,
            MOUSE_mg_slot(mg));
    }
}


XS(XS_Mouse_reader)
{
    dVAR; dXSARGS;
    dMOUSE_self;
    MAGIC* const mg = (MAGIC*)XSANY.any_ptr;

    if (items != 1) {
        mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
            "Cannot assign a value to a read-only accessor of %"SVf,
            MOUSE_mg_slot(mg));
    }

    SP -= items; /* PPCODE */
    PUTBACK;

    mouse_attr_get(aTHX_ self, mg);
}

XS(XS_Mouse_writer)
{
    dVAR; dXSARGS;
    dMOUSE_self;
    MAGIC* const mg = (MAGIC*)XSANY.any_ptr;

    if (items != 2) {
        mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
            "Too few arguments for a write-only accessor of %"SVf,
            MOUSE_mg_slot(mg));
    }

    SP -= items; /* PPCODE */
    PUTBACK;

    mouse_attr_set(aTHX_ self, mg, ST(1));
}

/* simple accessors */

/*
static MAGIC*
mouse_accessor_get_mg(pTHX_ CV* const xsub){
    return moose_mg_find(aTHX_ (SV*)xsub, &mouse_simple_accessor_vtbl, MOOSEf_DIE_ON_FAIL);
}
*/

CV*
mouse_simple_accessor_generate(pTHX_
    const char* const fq_name, const char* const key, I32 const keylen,
    XSUBADDR_t const accessor_impl, void* const dptr, I32 const dlen) {
    CV* const xsub = newXS((char*)fq_name, accessor_impl, __FILE__);
    SV* const slot = newSVpvn_share(key, keylen, 0U);
    MAGIC* mg;

    if(!fq_name){
        /* anonymous xsubs need sv_2mortal() */
        sv_2mortal((SV*)xsub);
    }

    mg = sv_magicext((SV*)xsub, slot,
        PERL_MAGIC_ext, &mouse_accessor_vtbl, (char*)dptr, dlen);

    SvREFCNT_dec(slot); /* sv_magicext() increases refcnt in mg_obj */
    if(dlen == HEf_SVKEY){
        SvREFCNT_dec(dptr);
    }

    /* NOTE:
     * although we use MAGIC for gc, we also store mg to CvXSUBANY
     * for efficiency (gfx)
     */
    CvXSUBANY(xsub).any_ptr = (void*)mg;

    return xsub;
}

XS(XS_Mouse_simple_reader)
{
    dVAR; dXSARGS;
    dMOUSE_self;
    MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
    SV* value;

    if (items != 1) {
        croak("Expected exactly one argument for a reader of %"SVf,
            MOUSE_mg_slot(mg));
    }

    value = get_slot(self, MOUSE_mg_slot(mg));
    if(!value) {
        if(MOUSE_mg_ptr(mg)){
            /* the default value must be a SV */
            assert(MOUSE_mg_len(mg) == HEf_SVKEY);
            value = (SV*)MOUSE_mg_ptr(mg);
        }
        else{
            value = &PL_sv_undef;
        }
    }

    ST(0) = value;
    XSRETURN(1);
}


XS(XS_Mouse_simple_writer)
{
    dVAR; dXSARGS;
    dMOUSE_self;
    SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);

    if (items != 2) {
        croak("Expected exactly two argument for a writer of %"SVf,
            slot);
    }

    ST(0) = set_slot(self, slot, ST(1));
    XSRETURN(1);
}

XS(XS_Mouse_simple_clearer)
{
    dVAR; dXSARGS;
    dMOUSE_self;
    SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
    SV* value;

    if (items != 1) {
        croak("Expected exactly one argument for a clearer of %"SVf,
            slot);
    }

    value = delete_slot(self, slot);
    ST(0) = value ? value : &PL_sv_undef;
    XSRETURN(1);
}

XS(XS_Mouse_simple_predicate)
{
    dVAR; dXSARGS;
    dMOUSE_self;
    SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);

    if (items != 1) {
        croak("Expected exactly one argument for a predicate of %"SVf, slot);
    }

    ST(0) = boolSV( has_slot(self, slot) );
    XSRETURN(1);
}

/* Class::Data::Inheritable-like class accessor */
XS(XS_Mouse_inheritable_class_accessor) {
    dVAR; dXSARGS;
    dMOUSE_self;
    SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
    SV* value;
    HV* stash;

    if(items == 1){ /* reader */
        value = NULL;
    }
    else if (items == 2){ /* writer */
        value = ST(1);
    }
    else{
        croak("Expected exactly one or two argument for a class data accessor"
            "of %"SVf, slot);
        value = NULL; /* -Wuninitialized */
    }

    stash = mouse_get_namespace(aTHX_ self);

    if(!value) { /* reader */
        value = get_slot(self, slot);
        if(!value) {
            AV* const isa   = mro_get_linear_isa(stash);
            I32 const len   = av_len(isa) + 1;
            I32 i;
            for(i = 1; i < len; i++) {
                SV* const klass = MOUSE_av_at(isa, i);
                SV* const meta  = get_metaclass(klass);
                if(!SvOK(meta)){
                    continue; /* skip non-Mouse classes */
                }
                value = get_slot(meta, slot);
                if(value) {
                    break;
                }
            }
            if(!value) {
                value = &PL_sv_undef;
            }
        }
    }
    else { /* writer */
        set_slot(self, slot, value);
        mro_method_changed_in(stash);
    }

    ST(0) = value;
    XSRETURN(1);
}

/* simple instance slot accessor (or Mouse::Meta::Instance) */

SV*
mouse_instance_create(pTHX_ HV* const stash) {
    SV* instance;
    assert(stash);
    assert(SvTYPE(stash) == SVt_PVHV);
    instance = sv_bless( newRV_noinc((SV*)newHV()), stash );
    return sv_2mortal(instance);
}

SV*
mouse_instance_clone(pTHX_ SV* const instance) {
    SV* proto;
    CHECK_INSTANCE(instance);
    assert(SvOBJECT(SvRV(instance)));

    proto = newRV_noinc((SV*)newHVhv((HV*)SvRV(instance)));
    sv_bless(proto, SvSTASH(SvRV(instance)));
    return sv_2mortal(proto);
}

bool
mouse_instance_has_slot(pTHX_ SV* const instance, SV* const slot) {
    assert(slot);
    CHECK_INSTANCE(instance);
    return hv_exists_ent((HV*)SvRV(instance), slot, 0U);
}

SV*
mouse_instance_get_slot(pTHX_ SV* const instance, SV* const slot) {
    HE* he;
    assert(slot);
    CHECK_INSTANCE(instance);
    he = hv_fetch_ent((HV*)SvRV(instance), slot, FALSE, 0U);
    return he ? HeVAL(he) : NULL;
}

SV*
mouse_instance_set_slot(pTHX_ SV* const instance, SV* const slot, SV* const value) {
    HE* he;
    SV* sv;
    assert(slot);
    assert(value);
    CHECK_INSTANCE(instance);
    he = hv_fetch_ent((HV*)SvRV(instance), slot, TRUE, 0U);
    sv = HeVAL(he);
    sv_setsv(sv, value);
    SvSETMAGIC(sv);
    return sv;
}

SV*
mouse_instance_delete_slot(pTHX_ SV* const instance, SV* const slot) {
    assert(instance);
    assert(slot);
    CHECK_INSTANCE(instance);
    return hv_delete_ent((HV*)SvRV(instance), slot, 0, 0U);
}

void
mouse_instance_weaken_slot(pTHX_ SV* const instance, SV* const slot) {
    HE* he;
    assert(slot);
    CHECK_INSTANCE(instance);
    he = hv_fetch_ent((HV*)SvRV(instance), slot, FALSE, 0U);
    if(he){
        sv_rvweaken(HeVAL(he));
    }
}

MODULE = Mouse::Meta::Method::Accessor::XS  PACKAGE = Mouse::Meta::Method::Accessor::XS

PROTOTYPES:   DISABLE
VERSIONCHECK: DISABLE

CV*
_generate_accessor(klass, SV* attr, metaclass)
CODE:
{
    RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_accessor);
}
OUTPUT:
    RETVAL

CV*
_generate_reader(klass, SV* attr, metaclass)
CODE:
{
    RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_reader);
}
OUTPUT:
    RETVAL

CV*
_generate_writer(klass, SV* attr, metaclass)
CODE:
{
    RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_writer);
}
OUTPUT:
    RETVAL

CV*
_generate_clearer(klass, SV* attr, metaclass)
CODE:
{
    SV* const slot = mcall0(attr, mouse_name);
    STRLEN len;
    const char* const pv = SvPV_const(slot, len);
    RETVAL = mouse_simple_accessor_generate(aTHX_ NULL, pv, len, XS_Mouse_simple_clearer, NULL, 0);
}
OUTPUT:
    RETVAL

CV*
_generate_predicate(klass, SV* attr, metaclass)
CODE:
{
    SV* const slot = mcall0(attr, mouse_name);
    STRLEN len;
    const char* const pv = SvPV_const(slot, len);
    RETVAL = mouse_simple_accessor_generate(aTHX_ NULL, pv, len, XS_Mouse_simple_predicate, NULL, 0);
}
OUTPUT:
    RETVAL
Commit	Line	Data
646c0371	1	#include "mouse.h"
646c0371	2
73d8d597	3	#define CHECK_INSTANCE(instance) STMT_START{ \
fcdc12ac	4	assert(instance); \
73d8d597	5	if(!(SvROK(instance) && SvTYPE(SvRV(instance)) == SVt_PVHV)){ \
ef53a04b	6	croak("Invalid object instance: '%"SVf"'", instance); \
73d8d597	7	} \
646c0371	8	} STMT_END
646c0371	9
646c0371	10
	11	#define MOUSE_mg_attribute(mg) MOUSE_xa_attribute(MOUSE_mg_xa(mg))
	12
646c0371	13	static MGVTBL mouse_accessor_vtbl; /* MAGIC identity */
646c0371	14
cc7cd81f	15	#define dMOUSE_self SV* const self = mouse_accessor_get_self(aTHX_ ax, items, cv)
646c0371	16
fc650569	17	STATIC_INLINE SV*
646c0371	18	mouse_accessor_get_self(pTHX_ I32 const ax, I32 const items, CV* const cv) {
646c0371	19	if(items < 1){
	20	croak("Too few arguments for %s", GvNAME(CvGV(cv)));
	21	}
646c0371	22	/* NOTE: If self has GETMAGIC, $self->accessor will invoke GETMAGIC
bce7d155	23	* before calling methods, so SvGETMAGIC(self) is not required here.
646c0371	24	*/
76770976	25	return ST(0);
646c0371	26	}
	27
	28
	29	CV*
a17f6313	30	mouse_accessor_generate(pTHX_ SV* const attr, XSUBADDR_t const accessor_impl){
0aad0266	31	AV* const xa = mouse_get_xa(aTHX_ attr);
646c0371	32	CV* xsub;
646c0371	33	MAGIC* mg;
646c0371	34
	35	xsub = newXS(NULL, accessor_impl, __FILE__);
	36	sv_2mortal((SV*)xsub);
	37
8d33c73a	38	mg = sv_magicext((SV*)xsub, MOUSE_xa_slot(xa),
8d33c73a	39	PERL_MAGIC_ext, &mouse_accessor_vtbl, (char*)xa, HEf_SVKEY);
0aad0266	40
4e7e3250	41	MOUSE_mg_flags(mg) = (U16)MOUSE_xa_flags(xa);
646c0371	42
646c0371	43	/* NOTE:
8d33c73a	44	* although we use MAGIC for gc, we also store mg to
8d33c73a	45	* CvXSUBANY for efficiency (gfx)
646c0371	46	*/
	47	CvXSUBANY(xsub).any_ptr = (void*)mg;
	48
646c0371	49	return xsub;
	50	}
	51
646c0371	52
646c0371	53	/* pushes return values, does auto-deref if needed */
	54	static void
	55	mouse_push_values(pTHX_ SV* const value, U16 const flags){
	56	dSP;
	57
208ffaeb	58	assert( flags & MOUSEf_ATTR_SHOULD_AUTO_DEREF && GIMME_V == G_ARRAY );
646c0371	59
208ffaeb	60	if(!(value && SvOK(value))){
	61	return;
	62	}
646c0371	63
208ffaeb	64	if(flags & MOUSEf_TC_IS_ARRAYREF){
80aa5731	65	AV* av;
208ffaeb	66	I32 len;
208ffaeb	67	I32 i;
646c0371	68
80aa5731	69	if(!IsArrayRef(value)){
208ffaeb	70	croak("Mouse-panic: Not an ARRAY reference");
646c0371	71	}
646c0371	72
80aa5731	73	av = (AV*)SvRV(value);
208ffaeb	74	len = av_len(av) + 1;
	75	EXTEND(SP, len);
	76	for(i = 0; i < len; i++){
	77	SV** const svp = av_fetch(av, i, FALSE);
	78	PUSHs(svp ? *svp : &PL_sv_undef);
646c0371	79	}
646c0371	80	}
caf77af6	81	else{
80aa5731	82	HV* hv;
208ffaeb	83	HE* he;
208ffaeb	84
caf77af6	85	assert(flags & MOUSEf_TC_IS_HASHREF);
caf77af6	86
80aa5731	87	if(!IsHashRef(value)){
208ffaeb	88	croak("Mouse-panic: Not a HASH reference");
	89	}
	90
80aa5731	91	hv = (HV*)SvRV(value);
208ffaeb	92	hv_iterinit(hv);
	93	while((he = hv_iternext(hv))){
	94	EXTEND(SP, 2);
	95	PUSHs(hv_iterkeysv(he));
	96	PUSHs(hv_iterval(hv, he));
	97	}
646c0371	98	}
	99
	100	PUTBACK;
	101	}
	102
bce7d155	103	STATIC_INLINE void
	104	mouse_push_value(pTHX_ SV* const value, U16 const flags) {
	105	if(flags & MOUSEf_ATTR_SHOULD_AUTO_DEREF && GIMME_V == G_ARRAY){
	106	mouse_push_values(aTHX_ value, flags);
	107	}
	108	else{
	109	dSP;
	110	XPUSHs(value ? value : &PL_sv_undef);
	111	PUTBACK;
	112	}
	113	}
	114
646c0371	115	static void
	116	mouse_attr_get(pTHX_ SV* const self, MAGIC* const mg){
	117	U16 const flags = MOUSE_mg_flags(mg);
646c0371	118	SV* value;
646c0371	119
4e7e3250	120	value = get_slot(self, MOUSE_mg_slot(mg));
646c0371	121
	122	/* check_lazy */
	123	if( !value && flags & MOUSEf_ATTR_IS_LAZY ){
4e7e3250	124	value = mouse_xa_set_default(aTHX_ MOUSE_mg_xa(mg), self);
646c0371	125	}
646c0371	126
bce7d155	127	mouse_push_value(aTHX_ value, flags);
646c0371	128	}
	129
	130	static void
	131	mouse_attr_set(pTHX_ SV* const self, MAGIC* const mg, SV* value){
	132	U16 const flags = MOUSE_mg_flags(mg);
	133	SV* const slot = MOUSE_mg_slot(mg);
	134
	135	if(flags & MOUSEf_ATTR_HAS_TC){
4e7e3250	136	value = mouse_xa_apply_type_constraint(aTHX_ MOUSE_mg_xa(mg), value, flags);
646c0371	137	}
646c0371	138
ca8e67d6	139	value = set_slot(self, slot, value);
646c0371	140
646c0371	141	if(flags & MOUSEf_ATTR_IS_WEAK_REF){
6fe2272b	142	weaken_slot(self, slot);
646c0371	143	}
	144
	145	if(flags & MOUSEf_ATTR_HAS_TRIGGER){
	146	SV* const trigger = mcall0s(MOUSE_mg_attribute(mg), "trigger");
	147	dSP;
	148
8ab2c6ab	149	/* NOTE: triggers can remove value, so
	150	value must be copied here,
	151	revealed by Net::Google::DataAPI (DANJOU).
	152	*/
	153	value = sv_mortalcopy(value);
	154
646c0371	155	PUSHMARK(SP);
	156	EXTEND(SP, 2);
	157	PUSHs(self);
	158	PUSHs(value);
	159
	160	PUTBACK;
b3cd4c14	161	call_sv_safe(trigger, G_VOID \| G_DISCARD);
646c0371	162	/* need not SPAGAIN */
8ab2c6ab	163
8ab2c6ab	164	assert(SvTYPE(value) != SVTYPEMASK);
646c0371	165	}
646c0371	166
bce7d155	167	mouse_push_value(aTHX_ value, flags);
646c0371	168	}
646c0371	169
30e11004	170	XS(XS_Mouse_accessor)
646c0371	171	{
	172	dVAR; dXSARGS;
	173	dMOUSE_self;
	174	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
	175
	176	SP -= items; /* PPCODE */
	177	PUTBACK;
	178
	179	if(items == 1){ /* reader */
	180	mouse_attr_get(aTHX_ self, mg);
	181	}
	182	else if (items == 2){ /* writer */
	183	mouse_attr_set(aTHX_ self, mg, ST(1));
	184	}
	185	else{
	186	mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
fad99075	187	"Expected exactly one or two argument for an accessor of %"SVf,
fad99075	188	MOUSE_mg_slot(mg));
646c0371	189	}
	190	}
	191
	192
30e11004	193	XS(XS_Mouse_reader)
646c0371	194	{
	195	dVAR; dXSARGS;
	196	dMOUSE_self;
	197	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
	198
	199	if (items != 1) {
	200	mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
fad99075	201	"Cannot assign a value to a read-only accessor of %"SVf,
fad99075	202	MOUSE_mg_slot(mg));
646c0371	203	}
	204
	205	SP -= items; /* PPCODE */
	206	PUTBACK;
	207
	208	mouse_attr_get(aTHX_ self, mg);
	209	}
	210
30e11004	211	XS(XS_Mouse_writer)
646c0371	212	{
	213	dVAR; dXSARGS;
	214	dMOUSE_self;
	215	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
	216
	217	if (items != 2) {
	218	mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
fad99075	219	"Too few arguments for a write-only accessor of %"SVf,
fad99075	220	MOUSE_mg_slot(mg));
646c0371	221	}
	222
	223	SP -= items; /* PPCODE */
	224	PUTBACK;
	225
	226	mouse_attr_set(aTHX_ self, mg, ST(1));
	227	}
	228
	229	/* simple accessors */
	230
	231	/*
	232	static MAGIC*
	233	mouse_accessor_get_mg(pTHX_ CV* const xsub){
	234	return moose_mg_find(aTHX_ (SV*)xsub, &mouse_simple_accessor_vtbl, MOOSEf_DIE_ON_FAIL);
	235	}
	236	*/
	237
	238	CV*
fad99075	239	mouse_simple_accessor_generate(pTHX_
	240	const char* const fq_name, const char* const key, I32 const keylen,
	241	XSUBADDR_t const accessor_impl, void* const dptr, I32 const dlen) {
646c0371	242	CV* const xsub = newXS((char*)fq_name, accessor_impl, __FILE__);
	243	SV* const slot = newSVpvn_share(key, keylen, 0U);
	244	MAGIC* mg;
	245
	246	if(!fq_name){
8d33c73a	247	/* anonymous xsubs need sv_2mortal() */
646c0371	248	sv_2mortal((SV*)xsub);
	249	}
	250
8d33c73a	251	mg = sv_magicext((SV*)xsub, slot,
	252	PERL_MAGIC_ext, &mouse_accessor_vtbl, (char*)dptr, dlen);
	253
646c0371	254	SvREFCNT_dec(slot); /* sv_magicext() increases refcnt in mg_obj */
e058b279	255	if(dlen == HEf_SVKEY){
	256	SvREFCNT_dec(dptr);
	257	}
646c0371	258
646c0371	259	/* NOTE:
8d33c73a	260	* although we use MAGIC for gc, we also store mg to CvXSUBANY
8d33c73a	261	* for efficiency (gfx)
646c0371	262	*/
	263	CvXSUBANY(xsub).any_ptr = (void*)mg;
	264
	265	return xsub;
	266	}
	267
30e11004	268	XS(XS_Mouse_simple_reader)
646c0371	269	{
	270	dVAR; dXSARGS;
	271	dMOUSE_self;
e058b279	272	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
646c0371	273	SV* value;
	274
	275	if (items != 1) {
fad99075	276	croak("Expected exactly one argument for a reader of %"SVf,
fad99075	277	MOUSE_mg_slot(mg));
646c0371	278	}
646c0371	279
e058b279	280	value = get_slot(self, MOUSE_mg_slot(mg));
2468f1d7	281	if(!value) {
	282	if(MOUSE_mg_ptr(mg)){
	283	/* the default value must be a SV */
	284	assert(MOUSE_mg_len(mg) == HEf_SVKEY);
	285	value = (SV*)MOUSE_mg_ptr(mg);
	286	}
	287	else{
	288	value = &PL_sv_undef;
	289	}
	290	}
	291
	292	ST(0) = value;
646c0371	293	XSRETURN(1);
	294	}
	295
	296
30e11004	297	XS(XS_Mouse_simple_writer)
646c0371	298	{
	299	dVAR; dXSARGS;
	300	dMOUSE_self;
	301	SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
	302
	303	if (items != 2) {
fad99075	304	croak("Expected exactly two argument for a writer of %"SVf,
fad99075	305	slot);
646c0371	306	}
646c0371	307
6fe2272b	308	ST(0) = set_slot(self, slot, ST(1));
646c0371	309	XSRETURN(1);
	310	}
	311
30e11004	312	XS(XS_Mouse_simple_clearer)
646c0371	313	{
	314	dVAR; dXSARGS;
	315	dMOUSE_self;
	316	SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
	317	SV* value;
	318
	319	if (items != 1) {
fad99075	320	croak("Expected exactly one argument for a clearer of %"SVf,
fad99075	321	slot);
646c0371	322	}
646c0371	323
6fe2272b	324	value = delete_slot(self, slot);
646c0371	325	ST(0) = value ? value : &PL_sv_undef;
	326	XSRETURN(1);
	327	}
	328
30e11004	329	XS(XS_Mouse_simple_predicate)
646c0371	330	{
	331	dVAR; dXSARGS;
	332	dMOUSE_self;
	333	SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
	334
	335	if (items != 1) {
fad99075	336	croak("Expected exactly one argument for a predicate of %"SVf, slot);
646c0371	337	}
646c0371	338
6fe2272b	339	ST(0) = boolSV( has_slot(self, slot) );
646c0371	340	XSRETURN(1);
	341	}
	342
fad99075	343	/* Class::Data::Inheritable-like class accessor */
	344	XS(XS_Mouse_inheritable_class_accessor) {
	345	dVAR; dXSARGS;
	346	dMOUSE_self;
	347	SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
	348	SV* value;
fad99075	349	HV* stash;
	350
	351	if(items == 1){ /* reader */
	352	value = NULL;
	353	}
	354	else if (items == 2){ /* writer */
	355	value = ST(1);
	356	}
	357	else{
	358	croak("Expected exactly one or two argument for a class data accessor"
	359	"of %"SVf, slot);
	360	value = NULL; /* -Wuninitialized */
	361	}
	362
05e658dc	363	stash = mouse_get_namespace(aTHX_ self);
fad99075	364
	365	if(!value) { /* reader */
	366	value = get_slot(self, slot);
	367	if(!value) {
	368	AV* const isa = mro_get_linear_isa(stash);
	369	I32 const len = av_len(isa) + 1;
	370	I32 i;
	371	for(i = 1; i < len; i++) {
	372	SV* const klass = MOUSE_av_at(isa, i);
	373	SV* const meta = get_metaclass(klass);
	374	if(!SvOK(meta)){
	375	continue; /* skip non-Mouse classes */
	376	}
	377	value = get_slot(meta, slot);
	378	if(value) {
	379	break;
	380	}
	381	}
	382	if(!value) {
	383	value = &PL_sv_undef;
	384	}
	385	}
	386	}
	387	else { /* writer */
	388	set_slot(self, slot, value);
	389	mro_method_changed_in(stash);
	390	}
	391
	392	ST(0) = value;
	393	XSRETURN(1);
	394	}
	395
76770976	396	/* simple instance slot accessor (or Mouse::Meta::Instance) */
646c0371	397
	398	SV*
	399	mouse_instance_create(pTHX_ HV* const stash) {
fcdc12ac	400	SV* instance;
646c0371	401	assert(stash);
aa2d2e2c	402	assert(SvTYPE(stash) == SVt_PVHV);
fcdc12ac	403	instance = sv_bless( newRV_noinc((SV*)newHV()), stash );
fcdc12ac	404	return sv_2mortal(instance);
646c0371	405	}
	406
	407	SV*
	408	mouse_instance_clone(pTHX_ SV* const instance) {
fcdc12ac	409	SV* proto;
646c0371	410	CHECK_INSTANCE(instance);
fcdc12ac	411	assert(SvOBJECT(SvRV(instance)));
	412
	413	proto = newRV_noinc((SV)newHVhv((HV)SvRV(instance)));
	414	sv_bless(proto, SvSTASH(SvRV(instance)));
	415	return sv_2mortal(proto);
646c0371	416	}
	417
	418	bool
	419	mouse_instance_has_slot(pTHX_ SV* const instance, SV* const slot) {
646c0371	420	assert(slot);
	421	CHECK_INSTANCE(instance);
	422	return hv_exists_ent((HV*)SvRV(instance), slot, 0U);
	423	}
	424
	425	SV*
	426	mouse_instance_get_slot(pTHX_ SV* const instance, SV* const slot) {
	427	HE* he;
646c0371	428	assert(slot);
	429	CHECK_INSTANCE(instance);
	430	he = hv_fetch_ent((HV*)SvRV(instance), slot, FALSE, 0U);
	431	return he ? HeVAL(he) : NULL;
	432	}
	433
	434	SV*
	435	mouse_instance_set_slot(pTHX_ SV* const instance, SV* const slot, SV* const value) {
	436	HE* he;
	437	SV* sv;
646c0371	438	assert(slot);
	439	assert(value);
	440	CHECK_INSTANCE(instance);
	441	he = hv_fetch_ent((HV*)SvRV(instance), slot, TRUE, 0U);
	442	sv = HeVAL(he);
957474ad	443	sv_setsv(sv, value);
957474ad	444	SvSETMAGIC(sv);
646c0371	445	return sv;
	446	}
	447
	448	SV*
	449	mouse_instance_delete_slot(pTHX_ SV* const instance, SV* const slot) {
	450	assert(instance);
	451	assert(slot);
	452	CHECK_INSTANCE(instance);
	453	return hv_delete_ent((HV*)SvRV(instance), slot, 0, 0U);
	454	}
	455
	456	void
	457	mouse_instance_weaken_slot(pTHX_ SV* const instance, SV* const slot) {
	458	HE* he;
646c0371	459	assert(slot);
	460	CHECK_INSTANCE(instance);
	461	he = hv_fetch_ent((HV*)SvRV(instance), slot, FALSE, 0U);
	462	if(he){
	463	sv_rvweaken(HeVAL(he));
	464	}
	465	}
346a3ab8	466
646c0371	467	MODULE = Mouse::Meta::Method::Accessor::XS PACKAGE = Mouse::Meta::Method::Accessor::XS
	468
	469	PROTOTYPES: DISABLE
	470	VERSIONCHECK: DISABLE
	471
	472	CV*
	473	_generate_accessor(klass, SV* attr, metaclass)
	474	CODE:
	475	{
a17f6313	476	RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_accessor);
646c0371	477	}
	478	OUTPUT:
	479	RETVAL
	480
	481	CV*
	482	_generate_reader(klass, SV* attr, metaclass)
	483	CODE:
	484	{
a17f6313	485	RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_reader);
646c0371	486	}
	487	OUTPUT:
	488	RETVAL
	489
	490	CV*
	491	_generate_writer(klass, SV* attr, metaclass)
	492	CODE:
	493	{
a17f6313	494	RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_writer);
646c0371	495	}
	496	OUTPUT:
	497	RETVAL
	498
	499	CV*
	500	_generate_clearer(klass, SV* attr, metaclass)
	501	CODE:
	502	{
06afbf31	503	SV* const slot = mcall0(attr, mouse_name);
646c0371	504	STRLEN len;
646c0371	505	const char* const pv = SvPV_const(slot, len);
a17f6313	506	RETVAL = mouse_simple_accessor_generate(aTHX_ NULL, pv, len, XS_Mouse_simple_clearer, NULL, 0);
646c0371	507	}
	508	OUTPUT:
	509	RETVAL
	510
	511	CV*
	512	_generate_predicate(klass, SV* attr, metaclass)
	513	CODE:
	514	{
06afbf31	515	SV* const slot = mcall0(attr, mouse_name);
646c0371	516	STRLEN len;
646c0371	517	const char* const pv = SvPV_const(slot, len);
a17f6313	518	RETVAL = mouse_simple_accessor_generate(aTHX_ NULL, pv, len, XS_Mouse_simple_predicate, NULL, 0);
646c0371	519	}
	520	OUTPUT:
	521	RETVAL
	522