[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");                          \
        }                                                              \
    } 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;

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

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

    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{ \
	4	if(!(SvROK(instance) && SvTYPE(SvRV(instance)) == SVt_PVHV)){ \
	5	croak("Invalid object instance"); \
	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
	147	PUSHMARK(SP);
	148	EXTEND(SP, 2);
	149	PUSHs(self);
	150	PUSHs(value);
	151
	152	PUTBACK;
	153	call_sv(trigger, G_VOID \| G_DISCARD);
	154	/* need not SPAGAIN */
	155	}
	156
208ffaeb	157	PUSH_VALUE(value, flags);
646c0371	158	}
646c0371	159
30e11004	160	XS(XS_Mouse_accessor)
646c0371	161	{
	162	dVAR; dXSARGS;
	163	dMOUSE_self;
	164	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
	165
	166	SP -= items; /* PPCODE */
	167	PUTBACK;
	168
	169	if(items == 1){ /* reader */
	170	mouse_attr_get(aTHX_ self, mg);
	171	}
	172	else if (items == 2){ /* writer */
	173	mouse_attr_set(aTHX_ self, mg, ST(1));
	174	}
	175	else{
	176	mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
	177	"Expected exactly one or two argument for an accessor");
	178	}
	179	}
	180
	181
30e11004	182	XS(XS_Mouse_reader)
646c0371	183	{
	184	dVAR; dXSARGS;
	185	dMOUSE_self;
	186	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
	187
	188	if (items != 1) {
	189	mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
	190	"Cannot assign a value to a read-only accessor");
	191	}
	192
	193	SP -= items; /* PPCODE */
	194	PUTBACK;
	195
	196	mouse_attr_get(aTHX_ self, mg);
	197	}
	198
30e11004	199	XS(XS_Mouse_writer)
646c0371	200	{
	201	dVAR; dXSARGS;
	202	dMOUSE_self;
	203	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
	204
	205	if (items != 2) {
	206	mouse_throw_error(MOUSE_mg_attribute(mg), NULL,
	207	"Too few arguments for a write-only accessor");
	208	}
	209
	210	SP -= items; /* PPCODE */
	211	PUTBACK;
	212
	213	mouse_attr_set(aTHX_ self, mg, ST(1));
	214	}
	215
	216	/* simple accessors */
	217
	218	/*
	219	static MAGIC*
	220	mouse_accessor_get_mg(pTHX_ CV* const xsub){
	221	return moose_mg_find(aTHX_ (SV*)xsub, &mouse_simple_accessor_vtbl, MOOSEf_DIE_ON_FAIL);
	222	}
	223	*/
	224
	225	CV*
a17f6313	226	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	227	CV* const xsub = newXS((char*)fq_name, accessor_impl, __FILE__);
	228	SV* const slot = newSVpvn_share(key, keylen, 0U);
	229	MAGIC* mg;
	230
	231	if(!fq_name){
	232	/* anonymous xsubs need sv_2mortal */
	233	sv_2mortal((SV*)xsub);
	234	}
	235
e058b279	236	mg = sv_magicext((SV)xsub, slot, PERL_MAGIC_ext, &mouse_accessor_vtbl, (char)dptr, dlen);
646c0371	237	SvREFCNT_dec(slot); /* sv_magicext() increases refcnt in mg_obj */
e058b279	238	if(dlen == HEf_SVKEY){
	239	SvREFCNT_dec(dptr);
	240	}
646c0371	241
	242	/* NOTE:
	243	* although we use MAGIC for gc, we also store mg to CvXSUBANY for efficiency (gfx)
	244	*/
	245	CvXSUBANY(xsub).any_ptr = (void*)mg;
	246
	247	return xsub;
	248	}
	249
30e11004	250	XS(XS_Mouse_simple_reader)
646c0371	251	{
	252	dVAR; dXSARGS;
	253	dMOUSE_self;
e058b279	254	MAGIC* const mg = (MAGIC*)XSANY.any_ptr;
646c0371	255	SV* value;
	256
	257	if (items != 1) {
e058b279	258	croak("Expected exactly one argument for a reader for '%"SVf"'", MOUSE_mg_slot(mg));
646c0371	259	}
646c0371	260
e058b279	261	value = get_slot(self, MOUSE_mg_slot(mg));
2468f1d7	262	if(!value) {
	263	if(MOUSE_mg_ptr(mg)){
	264	/* the default value must be a SV */
	265	assert(MOUSE_mg_len(mg) == HEf_SVKEY);
	266	value = (SV*)MOUSE_mg_ptr(mg);
	267	}
	268	else{
	269	value = &PL_sv_undef;
	270	}
	271	}
	272
	273	ST(0) = value;
646c0371	274	XSRETURN(1);
	275	}
	276
	277
30e11004	278	XS(XS_Mouse_simple_writer)
646c0371	279	{
	280	dVAR; dXSARGS;
	281	dMOUSE_self;
	282	SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
	283
	284	if (items != 2) {
	285	croak("Expected exactly two argument for a writer for '%"SVf"'", slot);
	286	}
	287
6fe2272b	288	ST(0) = set_slot(self, slot, ST(1));
646c0371	289	XSRETURN(1);
	290	}
	291
30e11004	292	XS(XS_Mouse_simple_clearer)
646c0371	293	{
	294	dVAR; dXSARGS;
	295	dMOUSE_self;
	296	SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
	297	SV* value;
	298
	299	if (items != 1) {
	300	croak("Expected exactly one argument for a clearer for '%"SVf"'", slot);
	301	}
	302
6fe2272b	303	value = delete_slot(self, slot);
646c0371	304	ST(0) = value ? value : &PL_sv_undef;
	305	XSRETURN(1);
	306	}
	307
30e11004	308	XS(XS_Mouse_simple_predicate)
646c0371	309	{
	310	dVAR; dXSARGS;
	311	dMOUSE_self;
	312	SV* const slot = MOUSE_mg_slot((MAGIC*)XSANY.any_ptr);
	313
	314	if (items != 1) {
	315	croak("Expected exactly one argument for a predicate for '%"SVf"'", slot);
	316	}
	317
6fe2272b	318	ST(0) = boolSV( has_slot(self, slot) );
646c0371	319	XSRETURN(1);
	320	}
	321
76770976	322	/* simple instance slot accessor (or Mouse::Meta::Instance) */
646c0371	323
	324	SV*
	325	mouse_instance_create(pTHX_ HV* const stash) {
	326	assert(stash);
aa2d2e2c	327	assert(SvTYPE(stash) == SVt_PVHV);
646c0371	328	return sv_bless( newRV_noinc((SV*)newHV()), stash );
	329	}
	330
	331	SV*
	332	mouse_instance_clone(pTHX_ SV* const instance) {
	333	HV* proto;
	334	assert(instance);
	335
	336	CHECK_INSTANCE(instance);
	337	proto = newHVhv((HV*)SvRV(instance));
	338	return sv_bless( newRV_noinc((SV*)proto), SvSTASH(SvRV(instance)) );
	339	}
	340
	341	bool
	342	mouse_instance_has_slot(pTHX_ SV* const instance, SV* const slot) {
	343	assert(instance);
	344	assert(slot);
	345	CHECK_INSTANCE(instance);
	346	return hv_exists_ent((HV*)SvRV(instance), slot, 0U);
	347	}
	348
	349	SV*
	350	mouse_instance_get_slot(pTHX_ SV* const instance, SV* const slot) {
	351	HE* he;
	352	assert(instance);
	353	assert(slot);
	354	CHECK_INSTANCE(instance);
	355	he = hv_fetch_ent((HV*)SvRV(instance), slot, FALSE, 0U);
	356	return he ? HeVAL(he) : NULL;
	357	}
	358
	359	SV*
	360	mouse_instance_set_slot(pTHX_ SV* const instance, SV* const slot, SV* const value) {
	361	HE* he;
	362	SV* sv;
	363	assert(instance);
	364	assert(slot);
	365	assert(value);
	366	CHECK_INSTANCE(instance);
	367	he = hv_fetch_ent((HV*)SvRV(instance), slot, TRUE, 0U);
	368	sv = HeVAL(he);
957474ad	369	sv_setsv(sv, value);
957474ad	370	SvSETMAGIC(sv);
646c0371	371	return sv;
	372	}
	373
	374	SV*
	375	mouse_instance_delete_slot(pTHX_ SV* const instance, SV* const slot) {
	376	assert(instance);
	377	assert(slot);
	378	CHECK_INSTANCE(instance);
	379	return hv_delete_ent((HV*)SvRV(instance), slot, 0, 0U);
	380	}
	381
	382	void
	383	mouse_instance_weaken_slot(pTHX_ SV* const instance, SV* const slot) {
	384	HE* he;
	385	assert(instance);
	386	assert(slot);
	387	CHECK_INSTANCE(instance);
	388	he = hv_fetch_ent((HV*)SvRV(instance), slot, FALSE, 0U);
	389	if(he){
	390	sv_rvweaken(HeVAL(he));
	391	}
	392	}
346a3ab8	393
646c0371	394	MODULE = Mouse::Meta::Method::Accessor::XS PACKAGE = Mouse::Meta::Method::Accessor::XS
	395
	396	PROTOTYPES: DISABLE
	397	VERSIONCHECK: DISABLE
	398
	399	CV*
	400	_generate_accessor(klass, SV* attr, metaclass)
	401	CODE:
	402	{
a17f6313	403	RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_accessor);
646c0371	404	}
	405	OUTPUT:
	406	RETVAL
	407
	408	CV*
	409	_generate_reader(klass, SV* attr, metaclass)
	410	CODE:
	411	{
a17f6313	412	RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_reader);
646c0371	413	}
	414	OUTPUT:
	415	RETVAL
	416
	417	CV*
	418	_generate_writer(klass, SV* attr, metaclass)
	419	CODE:
	420	{
a17f6313	421	RETVAL = mouse_accessor_generate(aTHX_ attr, XS_Mouse_writer);
646c0371	422	}
	423	OUTPUT:
	424	RETVAL
	425
	426	CV*
	427	_generate_clearer(klass, SV* attr, metaclass)
	428	CODE:
	429	{
06afbf31	430	SV* const slot = mcall0(attr, mouse_name);
646c0371	431	STRLEN len;
646c0371	432	const char* const pv = SvPV_const(slot, len);
a17f6313	433	RETVAL = mouse_simple_accessor_generate(aTHX_ NULL, pv, len, XS_Mouse_simple_clearer, NULL, 0);
646c0371	434	}
	435	OUTPUT:
	436	RETVAL
	437
	438	CV*
	439	_generate_predicate(klass, SV* attr, metaclass)
	440	CODE:
	441	{
06afbf31	442	SV* const slot = mcall0(attr, mouse_name);
646c0371	443	STRLEN len;
646c0371	444	const char* const pv = SvPV_const(slot, len);
a17f6313	445	RETVAL = mouse_simple_accessor_generate(aTHX_ NULL, pv, len, XS_Mouse_simple_predicate, NULL, 0);
646c0371	446	}
	447	OUTPUT:
	448	RETVAL
	449