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

#include "mouse.h"

#define CHECK_INSTANCE(instance) STMT_START{                           \
        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 necessarily needed 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;
}


#define PUSH_VALUE(value, flags) STMT_START { \
        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;                                                       \
        }                                                                  \
    } STMT_END                                                             \

/* 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 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);
    }

    PUSH_VALUE(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);
    }

    PUSH_VALUE(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");
    }
}


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");
    }

    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");
    }

    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 for '%"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 for '%"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 for '%"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 for '%"SVf"'", slot);
    }

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

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

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

SV*
mouse_instance_clone(pTHX_ SV* const instance) {
    HV* proto;
    assert(instance);

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

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