[gitmo/Package-Stash-XS.git] / Stash.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

typedef enum {
    VAR_NONE = 0,
    VAR_SCALAR,
    VAR_ARRAY,
    VAR_HASH,
    VAR_CODE,
    VAR_IO,
    VAR_GLOB,  /* TODO: unimplemented */
    VAR_FORMAT /* TODO: unimplemented */
} vartype_t;

typedef struct {
    vartype_t type;
    char sigil;
    char *name;
} varspec_t;

const char *vartype_to_string(vartype_t type)
{
    switch (type) {
    case VAR_SCALAR:
        return "SCALAR";
    case VAR_ARRAY:
        return "ARRAY";
    case VAR_HASH:
        return "HASH";
    case VAR_CODE:
        return "CODE";
    case VAR_IO:
        return "IO";
    default:
        return "unknown";
    }
}

I32 vartype_to_svtype(vartype_t type)
{
    switch (type) {
    case VAR_SCALAR:
        return SVt_PV; /* or whatever */
    case VAR_ARRAY:
        return SVt_PVAV;
    case VAR_HASH:
        return SVt_PVHV;
    case VAR_CODE:
        return SVt_PVCV;
    case VAR_IO:
        return SVt_PVIO;
    default:
        return SVt_NULL;
    }
}

vartype_t string_to_vartype(char *vartype)
{
    if (strEQ(vartype, "SCALAR")) {
        return VAR_SCALAR;
    }
    else if (strEQ(vartype, "ARRAY")) {
        return VAR_ARRAY;
    }
    else if (strEQ(vartype, "HASH")) {
        return VAR_HASH;
    }
    else if (strEQ(vartype, "CODE")) {
        return VAR_CODE;
    }
    else if (strEQ(vartype, "IO")) {
        return VAR_IO;
    }
    else {
        croak("Type must be one of 'SCALAR', 'ARRAY', 'HASH', 'CODE', or 'IO'");
    }
}

void _deconstruct_variable_name(char *variable, varspec_t *varspec)
{
    if (!variable || !variable[0])
        croak("You must pass a variable name");

    varspec->type = VAR_NONE;

    switch (variable[0]) {
    case '$':
        varspec->type = VAR_SCALAR;
        break;
    case '@':
        varspec->type = VAR_ARRAY;
        break;
    case '%':
        varspec->type = VAR_HASH;
        break;
    case '&':
        varspec->type = VAR_CODE;
        break;
    }

    if (varspec->type != VAR_NONE) {
        varspec->sigil = variable[0];
        varspec->name = &variable[1];
    }
    else {
        varspec->type = VAR_IO;
        varspec->sigil = '\0';
        varspec->name = variable;
    }
}

void _deconstruct_variable_hash(HV *variable, varspec_t *varspec)
{
    SV **val;
    char *type;

    val = hv_fetch(variable, "name", 4, 0);
    if (!val)
        croak("The 'name' key is required in variable specs");

    varspec->name = savesvpv(*val);

    val = hv_fetch(variable, "sigil", 5, 0);
    if (!val)
        croak("The 'sigil' key is required in variable specs");

    varspec->sigil = (SvPV_nolen(*val))[0];

    val = hv_fetch(variable, "type", 4, 0);
    if (!val)
        croak("The 'type' key is required in variable specs");

    varspec->type = string_to_vartype(SvPV_nolen(*val));
}

int _valid_for_type(SV *value, vartype_t type)
{
    svtype sv_type = SvROK(value) ? SvTYPE(SvRV(value)) : SVt_NULL;

    switch (type) {
    case VAR_SCALAR:
        return sv_type == SVt_NULL ||
               sv_type == SVt_IV   ||
               sv_type == SVt_NV   ||
               sv_type == SVt_PV   ||
               sv_type == SVt_RV;
    case VAR_ARRAY:
        return sv_type == SVt_PVAV;
    case VAR_HASH:
        return sv_type == SVt_PVHV;
    case VAR_CODE:
        return sv_type == SVt_PVCV;
    case VAR_IO:
        return sv_type == SVt_PVIO;
    default:
        return 0;
    }
}

HV *_get_namespace(SV *self)
{
    dSP;
    SV *ret;

    PUSHMARK(SP);
    XPUSHs(self);
    PUTBACK;

    call_method("namespace", G_SCALAR);

    SPAGAIN;
    ret = POPs;
    PUTBACK;

    return (HV*)SvRV(ret);
}

SV *_get_name(SV *self)
{
    dSP;
    SV *ret;

    PUSHMARK(SP);
    XPUSHs(self);
    PUTBACK;

    call_method("name", G_SCALAR);

    SPAGAIN;
    ret = POPs;
    PUTBACK;

    return ret;
}

MODULE = Package::Stash  PACKAGE = Package::Stash

PROTOTYPES: DISABLE

SV*
new(class, package_name)
    char *class
    SV *package_name
  PREINIT:
    HV *instance;
    HV *namespace;
  CODE:
    if (!SvPOK(package_name))
        croak("The constructor argument must be the name of a package");

    instance = newHV();

    hv_store(instance, "name", 4, package_name, 0);
    namespace = gv_stashpv(SvPV_nolen(package_name), GV_ADD);
    hv_store(instance, "namespace", 9, newRV((SV*)namespace), 0);

    RETVAL = sv_bless(newRV((SV*)instance), gv_stashpv(class, 0));
  OUTPUT:
    RETVAL

SV*
name(self)
    SV *self
  PREINIT:
    SV **slot;
  CODE:
    if (!sv_isobject(self))
        croak("Can't call name as a class method");
    slot = hv_fetch((HV*)SvRV(self), "name", 4, 0);
    RETVAL = slot ? SvREFCNT_inc(*slot) : &PL_sv_undef;
  OUTPUT:
    RETVAL

SV*
namespace(self)
    SV *self
  PREINIT:
    SV **slot;
  CODE:
    if (!sv_isobject(self))
        croak("Can't call namespace as a class method");
    slot = hv_fetch((HV*)SvRV(self), "namespace", 9, 0);
    RETVAL = slot ? SvREFCNT_inc(*slot) : &PL_sv_undef;
  OUTPUT:
    RETVAL

void
add_package_symbol(self, variable, initial=NULL, ...)
    SV *self
    varspec_t variable
    SV *initial
  PREINIT:
    SV *name;
    GV *glob;
  CODE:
    if (initial && !_valid_for_type(initial, variable.type))
        croak("%s is not of type %s",
              SvPV_nolen(initial), vartype_to_string(variable.type));

    name = newSVsv(_get_name(self));
    sv_catpvs(name, "::");
    sv_catpv(name, variable.name);

    /* XXX: come back to this when i feel like reimplementing caller() */
/*
    my $filename = $opts{filename};
    my $first_line_num = $opts{first_line_num};

    (undef, $filename, $first_line_num) = caller
        if not defined $filename;

    my $last_line_num = $opts{last_line_num} || ($first_line_num ||= 0);

    # http://perldoc.perl.org/perldebguts.html#Debugger-Internals
    $DB::sub{$pkg . '::' . $name} = "$filename:$first_line_num-$last_line_num";
*/
/*
    if (items > 2 && (PL_perldb & 0x10) && variable.type == VAR_CODE) {
        int i;
        char *filename = NULL, *name;
        I32 first_line_num, last_line_num;

        if ((items - 3) % 2)
            croak("add_package_symbol: Odd number of elements in %%opts");

        for (i = 3; i < items; i += 2) {
            char *key;
            key = SvPV_nolen(ST(i));
            if (strEQ(key, "filename")) {
                if (!SvPOK(ST(i + 1)))
                    croak("add_package_symbol: filename must be a string");
                filename = SvPV_nolen(ST(i + 1));
            }
            else if (strEQ(key, "first_line_num")) {
                if (!SvIOK(ST(i + 1)))
                    croak("add_package_symbol: first_line_num must be an integer");
                first_line_num = SvIV(ST(i + 1));
            }
            else if (strEQ(key, "last_line_num")) {
                if (!SvIOK(ST(i + 1)))
                    croak("add_package_symbol: last_line_num must be an integer");
                last_line_num = SvIV(ST(i + 1));
            }
        }

        if (!filename) {
        }
    }
*/

    glob = gv_fetchsv(name, GV_ADD, vartype_to_svtype(variable.type));

    if (initial) {
        SV *val;

        if (SvROK(initial)) {
            val = SvRV(initial);
            SvREFCNT_inc(val);
        }
        else {
            val = newSVsv(initial);
        }

        switch (variable.type) {
        case VAR_SCALAR:
            GvSV(glob) = val;
            break;
        case VAR_ARRAY:
            GvAV(glob) = (AV*)val;
            break;
        case VAR_HASH:
            GvHV(glob) = (HV*)val;
            break;
        case VAR_CODE:
            GvCV(glob) = (CV*)val;
            break;
        case VAR_IO:
            GvIOp(glob) = (IO*)val;
            break;
        }
    }

void
remove_package_glob(self, name)
    SV *self
    char *name
  CODE:
    hv_delete(_get_namespace(self), name, strlen(name), G_DISCARD);

int
has_package_symbol(self, variable)
    SV *self
    varspec_t variable
  PREINIT:
    HV *namespace;
    SV **entry;
  CODE:
    namespace = _get_namespace(self);
    entry = hv_fetch(namespace, variable.name, strlen(variable.name), 0);
    if (!entry)
        XSRETURN_UNDEF;

    if (isGV(*entry)) {
        GV *glob = (GV*)(*entry);
        switch (variable.type) {
        case VAR_SCALAR:
            RETVAL = GvSV(glob) ? 1 : 0;
            break;
        case VAR_ARRAY:
            RETVAL = GvAV(glob) ? 1 : 0;
            break;
        case VAR_HASH:
            RETVAL = GvHV(glob) ? 1 : 0;
            break;
        case VAR_CODE:
            RETVAL = GvCV(glob) ? 1 : 0;
            break;
        case VAR_IO:
            RETVAL = GvIO(glob) ? 1 : 0;
            break;
        }
    }
    else {
        RETVAL = (variable.type == VAR_CODE);
    }
  OUTPUT:
    RETVAL

SV*
get_package_symbol(self, variable, ...)
    SV *self
    varspec_t variable
  PREINIT:
    HV *namespace;
    SV **entry;
    GV *glob;
  CODE:
    namespace = _get_namespace(self);

    if (!hv_exists(namespace, variable.name, strlen(variable.name))) {
        int i, vivify = 0;
        if ((items - 2) % 2)
            croak("get_package_symbol: Odd number of elements in %%opts");

        for (i = 2; i < items; i += 2) {
            char *key;
            key = SvPV_nolen(ST(i));
            if (strEQ(key, "vivify")) {
                vivify = SvTRUE(ST(i + 1));
            }
        }

        if (vivify) {
            /* XXX: vivify */
        }
    }

    entry = hv_fetch(namespace, variable.name, strlen(variable.name), 0);
    if (!entry)
        XSRETURN_UNDEF;

    glob = (GV*)(*entry);

    if (!isGV(*entry)) {
        SV *namesv;
        char *name;
        int len;

        namesv = newSVsv(_get_name(self));
        sv_catpvs(namesv, "::");
        sv_catpv(namesv, variable.name);

        name = SvPV(namesv, len);

        gv_init(glob, namespace, name, len, 1);
    }

    switch (variable.type) {
    case VAR_SCALAR:
        RETVAL = newRV(GvSV(glob));
        break;
    case VAR_ARRAY:
        RETVAL = newRV((SV*)GvAV(glob));
        break;
    case VAR_HASH:
        RETVAL = newRV((SV*)GvHV(glob));
        break;
    case VAR_CODE:
        RETVAL = newRV((SV*)GvCV(glob));
        break;
    case VAR_IO:
        RETVAL = newRV((SV*)GvIO(glob));
        break;
    }
  OUTPUT:
    RETVAL

void
remove_package_symbol(self, variable)
    SV *self
    varspec_t variable
  PREINIT:
    HV *namespace;
    SV **entry;
  CODE:
    namespace = _get_namespace(self);
    entry = hv_fetch(namespace, variable.name, strlen(variable.name), 0);
    if (!entry)
        XSRETURN_EMPTY;

    if (isGV(*entry)) {
        GV *glob = (GV*)(*entry);
        switch (variable.type) {
        case VAR_SCALAR:
            GvSV(glob) = Nullsv;
            break;
        case VAR_ARRAY:
            GvAV(glob) = Nullav;
            break;
        case VAR_HASH:
            GvHV(glob) = Nullhv;
            break;
        case VAR_CODE:
            GvCV(glob) = Nullcv;
            break;
        case VAR_IO:
            GvIOp(glob) = Null(IO*);
            break;
        }
    }
    else {
        if (variable.type == VAR_CODE) {
            hv_delete(namespace, variable.name, strlen(variable.name), G_DISCARD);
        }
    }

void
list_all_package_symbols(self, vartype=VAR_NONE)
    SV *self
    vartype_t vartype
  PPCODE:
    if (vartype == VAR_NONE) {
        HV *namespace;
        HE *entry;
        int keys;

        namespace = _get_namespace(self);
        keys = hv_iterinit(namespace);
        EXTEND(SP, keys);
        while (entry = hv_iternext(namespace)) {
            mPUSHs(newSVhek(HeKEY_hek(entry)));
        }
    }
    else {
        HV *namespace;
        HE *entry;
        SV *val;
        char *key;
        int len;

        namespace = _get_namespace(self);
        hv_iterinit(namespace);
        while (val = hv_iternextsv(namespace, &key, &len)) {
            GV *gv = (GV*)val;
            if (isGV(gv)) {
                switch (vartype) {
                case VAR_SCALAR:
                    if (GvSV(val))
                        mXPUSHp(key, len);
                    break;
                case VAR_ARRAY:
                    if (GvAV(val))
                        mXPUSHp(key, len);
                    break;
                case VAR_HASH:
                    if (GvHV(val))
                        mXPUSHp(key, len);
                    break;
                case VAR_CODE:
                    if (GvCVu(val))
                        mXPUSHp(key, len);
                    break;
                case VAR_IO:
                    if (GvIO(val))
                        mXPUSHp(key, len);
                    break;
                }
            }
            else if (vartype == VAR_CODE) {
                mXPUSHp(key, len);
            }
        }
    }
Commit	Line	Data
59017825	1	#include "EXTERN.h"
	2	#include "perl.h"
	3	#include "XSUB.h"
	4
a382a84b	5	typedef enum {
	6	VAR_NONE = 0,
	7	VAR_SCALAR,
	8	VAR_ARRAY,
	9	VAR_HASH,
	10	VAR_CODE,
	11	VAR_IO,
	12	VAR_GLOB, /* TODO: unimplemented */
	13	VAR_FORMAT /* TODO: unimplemented */
	14	} vartype_t;
	15
	16	typedef struct {
	17	vartype_t type;
	18	char sigil;
	19	char *name;
	20	} varspec_t;
	21
76f7c306	22	const char *vartype_to_string(vartype_t type)
	23	{
	24	switch (type) {
	25	case VAR_SCALAR:
	26	return "SCALAR";
	27	case VAR_ARRAY:
	28	return "ARRAY";
	29	case VAR_HASH:
	30	return "HASH";
	31	case VAR_CODE:
	32	return "CODE";
	33	case VAR_IO:
	34	return "IO";
	35	default:
	36	return "unknown";
	37	}
	38	}
	39
	40	I32 vartype_to_svtype(vartype_t type)
	41	{
	42	switch (type) {
	43	case VAR_SCALAR:
	44	return SVt_PV; /* or whatever */
	45	case VAR_ARRAY:
	46	return SVt_PVAV;
	47	case VAR_HASH:
	48	return SVt_PVHV;
	49	case VAR_CODE:
	50	return SVt_PVCV;
	51	case VAR_IO:
	52	return SVt_PVIO;
	53	default:
	54	return SVt_NULL;
	55	}
	56	}
	57
a382a84b	58	vartype_t string_to_vartype(char *vartype)
	59	{
	60	if (strEQ(vartype, "SCALAR")) {
	61	return VAR_SCALAR;
	62	}
	63	else if (strEQ(vartype, "ARRAY")) {
	64	return VAR_ARRAY;
	65	}
	66	else if (strEQ(vartype, "HASH")) {
	67	return VAR_HASH;
	68	}
	69	else if (strEQ(vartype, "CODE")) {
	70	return VAR_CODE;
	71	}
	72	else if (strEQ(vartype, "IO")) {
	73	return VAR_IO;
	74	}
	75	else {
	76	croak("Type must be one of 'SCALAR', 'ARRAY', 'HASH', 'CODE', or 'IO'");
	77	}
	78	}
	79
	80	void _deconstruct_variable_name(char variable, varspec_t varspec)
	81	{
	82	if (!variable \|\| !variable[0])
	83	croak("You must pass a variable name");
	84
	85	varspec->type = VAR_NONE;
	86
	87	switch (variable[0]) {
	88	case '$':
	89	varspec->type = VAR_SCALAR;
	90	break;
	91	case '@':
	92	varspec->type = VAR_ARRAY;
	93	break;
	94	case '%':
	95	varspec->type = VAR_HASH;
	96	break;
	97	case '&':
	98	varspec->type = VAR_CODE;
	99	break;
	100	}
	101
	102	if (varspec->type != VAR_NONE) {
	103	varspec->sigil = variable[0];
	104	varspec->name = &variable[1];
	105	}
	106	else {
	107	varspec->type = VAR_IO;
	108	varspec->sigil = '\0';
	109	varspec->name = variable;
	110	}
	111	}
	112
	113	void _deconstruct_variable_hash(HV variable, varspec_t varspec)
	114	{
	115	SV **val;
	116	char *type;
	117
	118	val = hv_fetch(variable, "name", 4, 0);
	119	if (!val)
	120	croak("The 'name' key is required in variable specs");
	121
122	varspec->name = savesvpv(*val);
123
124	val = hv_fetch(variable, "sigil", 5, 0);
125	if (!val)
126	croak("The 'sigil' key is required in variable specs");
127
128	varspec->sigil = (SvPV_nolen(*val))[0];
129
130	val = hv_fetch(variable, "type", 4, 0);
131	if (!val)
132	croak("The 'type' key is required in variable specs");
133
134	varspec->type = string_to_vartype(SvPV_nolen(*val));
135	}
136
137	int _valid_for_type(SV *value, vartype_t type)
138	{
139	svtype sv_type = SvROK(value) ? SvTYPE(SvRV(value)) : SVt_NULL;
140
141	switch (type) {
142	case VAR_SCALAR:
143	return sv_type == SVt_NULL \|\|
144	sv_type == SVt_IV \|\|
145	sv_type == SVt_NV \|\|
146	sv_type == SVt_PV \|\|
147	sv_type == SVt_RV;
148	case VAR_ARRAY:
149	return sv_type == SVt_PVAV;
150	case VAR_HASH:
151	return sv_type == SVt_PVHV;
152	case VAR_CODE:
153	return sv_type == SVt_PVCV;
154	case VAR_IO:
76f7c306	155	return sv_type == SVt_PVIO;
a382a84b	156	default:
	157	return 0;
	158	}
	159	}
	160
3fd56b4d	161	HV _get_namespace(SV self)
	162	{
	163	dSP;
	164	SV *ret;
	165
	166	PUSHMARK(SP);
	167	XPUSHs(self);
	168	PUTBACK;
	169
	170	call_method("namespace", G_SCALAR);
	171
	172	SPAGAIN;
	173	ret = POPs;
	174	PUTBACK;
	175
	176	return (HV*)SvRV(ret);
	177	}
	178
76f7c306	179	SV _get_name(SV self)
	180	{
	181	dSP;
	182	SV *ret;
	183
	184	PUSHMARK(SP);
	185	XPUSHs(self);
	186	PUTBACK;
	187
	188	call_method("name", G_SCALAR);
	189
	190	SPAGAIN;
	191	ret = POPs;
	192	PUTBACK;
	193
	194	return ret;
	195	}
	196
59017825	197	MODULE = Package::Stash PACKAGE = Package::Stash
59017825	198
be2a7e99	199	PROTOTYPES: DISABLE
be2a7e99	200
59017825	201	SV*
	202	new(class, package_name)
	203	char *class
	204	SV *package_name
3496f1e8	205	PREINIT:
59017825	206	HV *instance;
	207	HV *namespace;
	208	CODE:
	209	if (!SvPOK(package_name))
	210	croak("The constructor argument must be the name of a package");
	211
	212	instance = newHV();
	213
	214	hv_store(instance, "name", 4, package_name, 0);
	215	namespace = gv_stashpv(SvPV_nolen(package_name), GV_ADD);
	216	hv_store(instance, "namespace", 9, newRV((SV*)namespace), 0);
	217
	218	RETVAL = sv_bless(newRV((SV*)instance), gv_stashpv(class, 0));
	219	OUTPUT:
	220	RETVAL
194acf47	221
	222	SV*
	223	name(self)
	224	SV *self
3496f1e8	225	PREINIT:
194acf47	226	SV **slot;
	227	CODE:
	228	if (!sv_isobject(self))
	229	croak("Can't call name as a class method");
	230	slot = hv_fetch((HV*)SvRV(self), "name", 4, 0);
	231	RETVAL = slot ? SvREFCNT_inc(*slot) : &PL_sv_undef;
	232	OUTPUT:
	233	RETVAL
	234
	235	SV*
	236	namespace(self)
	237	SV *self
3496f1e8	238	PREINIT:
194acf47	239	SV **slot;
	240	CODE:
	241	if (!sv_isobject(self))
	242	croak("Can't call namespace as a class method");
	243	slot = hv_fetch((HV*)SvRV(self), "namespace", 9, 0);
	244	RETVAL = slot ? SvREFCNT_inc(*slot) : &PL_sv_undef;
	245	OUTPUT:
	246	RETVAL
3fd56b4d	247
3fd56b4d	248	void
76f7c306	249	add_package_symbol(self, variable, initial=NULL, ...)
	250	SV *self
	251	varspec_t variable
	252	SV *initial
	253	PREINIT:
	254	SV *name;
	255	GV *glob;
	256	CODE:
	257	if (initial && !_valid_for_type(initial, variable.type))
	258	croak("%s is not of type %s",
	259	SvPV_nolen(initial), vartype_to_string(variable.type));
	260
	261	name = newSVsv(_get_name(self));
	262	sv_catpvs(name, "::");
	263	sv_catpv(name, variable.name);
	264
	265	/* XXX: come back to this when i feel like reimplementing caller() */
	266	/*
	267	my $filename = $opts{filename};
	268	my $first_line_num = $opts{first_line_num};
	269
	270	(undef, $filename, $first_line_num) = caller
	271	if not defined $filename;
	272
	273	my $last_line_num = $opts{last_line_num} \|\| ($first_line_num \|\|= 0);
	274
	275	# http://perldoc.perl.org/perldebguts.html#Debugger-Internals
	276	$DB::sub{$pkg . '::' . $name} = "$filename:$first_line_num-$last_line_num";
	277	*/
	278	/*
	279	if (items > 2 && (PL_perldb & 0x10) && variable.type == VAR_CODE) {
	280	int i;
	281	char filename = NULL, name;
	282	I32 first_line_num, last_line_num;
	283
	284	if ((items - 3) % 2)
	285	croak("add_package_symbol: Odd number of elements in %%opts");
	286
	287	for (i = 3; i < items; i += 2) {
	288	char *key;
	289	key = SvPV_nolen(ST(i));
	290	if (strEQ(key, "filename")) {
	291	if (!SvPOK(ST(i + 1)))
	292	croak("add_package_symbol: filename must be a string");
	293	filename = SvPV_nolen(ST(i + 1));
	294	}
	295	else if (strEQ(key, "first_line_num")) {
	296	if (!SvIOK(ST(i + 1)))
	297	croak("add_package_symbol: first_line_num must be an integer");
	298	first_line_num = SvIV(ST(i + 1));
	299	}
	300	else if (strEQ(key, "last_line_num")) {
	301	if (!SvIOK(ST(i + 1)))
	302	croak("add_package_symbol: last_line_num must be an integer");
	303	last_line_num = SvIV(ST(i + 1));
	304	}
	305	}
	306
	307	if (!filename) {
	308	}
	309	}
	310	*/
	311
	312	glob = gv_fetchsv(name, GV_ADD, vartype_to_svtype(variable.type));
313
314	if (initial) {
315	SV *val;
316
317	if (SvROK(initial)) {
318	val = SvRV(initial);
319	SvREFCNT_inc(val);
320	}
321	else {
322	val = newSVsv(initial);
323	}
324
325	switch (variable.type) {
326	case VAR_SCALAR:
327	GvSV(glob) = val;
328	break;
329	case VAR_ARRAY:
330	GvAV(glob) = (AV*)val;
331	break;
332	case VAR_HASH:
333	GvHV(glob) = (HV*)val;
334	break;
335	case VAR_CODE:
336	GvCV(glob) = (CV*)val;
337	break;
338	case VAR_IO:
339	GvIOp(glob) = (IO*)val;
340	break;
341	}
342	}
343
344	void
3fd56b4d	345	remove_package_glob(self, name)
	346	SV *self
	347	char *name
3fd56b4d	348	CODE:
3fd56b4d	349	hv_delete(_get_namespace(self), name, strlen(name), G_DISCARD);
9b608466	350
34805376	351	int
	352	has_package_symbol(self, variable)
	353	SV *self
	354	varspec_t variable
	355	PREINIT:
	356	HV *namespace;
	357	SV **entry;
	358	CODE:
	359	namespace = _get_namespace(self);
	360	entry = hv_fetch(namespace, variable.name, strlen(variable.name), 0);
	361	if (!entry)
	362	XSRETURN_UNDEF;
	363
	364	if (isGV(*entry)) {
	365	GV glob = (GV)(*entry);
	366	switch (variable.type) {
	367	case VAR_SCALAR:
	368	RETVAL = GvSV(glob) ? 1 : 0;
	369	break;
	370	case VAR_ARRAY:
	371	RETVAL = GvAV(glob) ? 1 : 0;
	372	break;
	373	case VAR_HASH:
	374	RETVAL = GvHV(glob) ? 1 : 0;
	375	break;
	376	case VAR_CODE:
	377	RETVAL = GvCV(glob) ? 1 : 0;
	378	break;
	379	case VAR_IO:
	380	RETVAL = GvIO(glob) ? 1 : 0;
	381	break;
	382	}
	383	}
	384	else {
	385	RETVAL = (variable.type == VAR_CODE);
	386	}
	387	OUTPUT:
	388	RETVAL
	389
e3ad44fd	390	SV*
	391	get_package_symbol(self, variable, ...)
	392	SV *self
	393	varspec_t variable
	394	PREINIT:
	395	HV *namespace;
	396	SV **entry;
cb4df463	397	GV *glob;
e3ad44fd	398	CODE:
	399	namespace = _get_namespace(self);
	400
	401	if (!hv_exists(namespace, variable.name, strlen(variable.name))) {
	402	int i, vivify = 0;
	403	if ((items - 2) % 2)
	404	croak("get_package_symbol: Odd number of elements in %%opts");
	405
	406	for (i = 2; i < items; i += 2) {
	407	char *key;
	408	key = SvPV_nolen(ST(i));
	409	if (strEQ(key, "vivify")) {
	410	vivify = SvTRUE(ST(i + 1));
	411	}
	412	}
	413
	414	if (vivify) {
	415	/* XXX: vivify */
	416	}
	417	}
	418
	419	entry = hv_fetch(namespace, variable.name, strlen(variable.name), 0);
	420	if (!entry)
	421	XSRETURN_UNDEF;
	422
cb4df463	423	glob = (GV)(entry);
	424
	425	if (!isGV(*entry)) {
	426	SV *namesv;
	427	char *name;
	428	int len;
	429
	430	namesv = newSVsv(_get_name(self));
	431	sv_catpvs(namesv, "::");
	432	sv_catpv(namesv, variable.name);
	433
	434	name = SvPV(namesv, len);
	435
	436	gv_init(glob, namespace, name, len, 1);
e3ad44fd	437	}
cb4df463	438
	439	switch (variable.type) {
	440	case VAR_SCALAR:
	441	RETVAL = newRV(GvSV(glob));
	442	break;
	443	case VAR_ARRAY:
	444	RETVAL = newRV((SV*)GvAV(glob));
	445	break;
	446	case VAR_HASH:
	447	RETVAL = newRV((SV*)GvHV(glob));
	448	break;
	449	case VAR_CODE:
	450	RETVAL = newRV((SV*)GvCV(glob));
	451	break;
	452	case VAR_IO:
	453	RETVAL = newRV((SV*)GvIO(glob));
	454	break;
e3ad44fd	455	}
	456	OUTPUT:
	457	RETVAL
	458
9b608466	459	void
215f49f8	460	remove_package_symbol(self, variable)
	461	SV *self
	462	varspec_t variable
	463	PREINIT:
	464	HV *namespace;
	465	SV **entry;
	466	CODE:
	467	namespace = _get_namespace(self);
	468	entry = hv_fetch(namespace, variable.name, strlen(variable.name), 0);
	469	if (!entry)
	470	XSRETURN_EMPTY;
	471
	472	if (isGV(*entry)) {
	473	GV glob = (GV)(*entry);
	474	switch (variable.type) {
	475	case VAR_SCALAR:
	476	GvSV(glob) = Nullsv;
	477	break;
	478	case VAR_ARRAY:
	479	GvAV(glob) = Nullav;
	480	break;
	481	case VAR_HASH:
	482	GvHV(glob) = Nullhv;
	483	break;
	484	case VAR_CODE:
	485	GvCV(glob) = Nullcv;
	486	break;
	487	case VAR_IO:
76f7c306	488	GvIOp(glob) = Null(IO*);
215f49f8	489	break;
	490	}
	491	}
	492	else {
	493	if (variable.type == VAR_CODE) {
	494	hv_delete(namespace, variable.name, strlen(variable.name), G_DISCARD);
	495	}
	496	}
	497
	498	void
9b608466	499	list_all_package_symbols(self, vartype=VAR_NONE)
	500	SV *self
	501	vartype_t vartype
	502	PPCODE:
	503	if (vartype == VAR_NONE) {
	504	HV *namespace;
	505	HE *entry;
	506	int keys;
	507
	508	namespace = _get_namespace(self);
	509	keys = hv_iterinit(namespace);
	510	EXTEND(SP, keys);
	511	while (entry = hv_iternext(namespace)) {
	512	mPUSHs(newSVhek(HeKEY_hek(entry)));
	513	}
	514	}
	515	else {
	516	HV *namespace;
	517	HE *entry;
	518	SV *val;
	519	char *key;
	520	int len;
	521
	522	namespace = _get_namespace(self);
	523	hv_iterinit(namespace);
	524	while (val = hv_iternextsv(namespace, &key, &len)) {
	525	GV gv = (GV)val;
	526	if (isGV(gv)) {
	527	switch (vartype) {
	528	case VAR_SCALAR:
	529	if (GvSV(val))
	530	mXPUSHp(key, len);
	531	break;
	532	case VAR_ARRAY:
	533	if (GvAV(val))
	534	mXPUSHp(key, len);
	535	break;
	536	case VAR_HASH:
	537	if (GvHV(val))
	538	mXPUSHp(key, len);
	539	break;
	540	case VAR_CODE:
	541	if (GvCVu(val))
	542	mXPUSHp(key, len);
	543	break;
	544	case VAR_IO:
	545	if (GvIO(val))
	546	mXPUSHp(key, len);
	547	break;
	548	}
	549	}
	550	else if (vartype == VAR_CODE) {
	551	mXPUSHp(key, len);
	552	}
	553	}
	554	}