/
default.pmc
1721 lines (1093 loc) · 33.9 KB
/
default.pmc
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/*
Copyright (C) 2001-2012, Parrot Foundation.
=head1 NAME
src/pmc/default.pmc - Abstract root class
=head1 DESCRIPTION
These are the vtable functions for the default PMC class.
All methods which are not defined here get a default implementation
generated from F<src/vtable.tbl> by F<tools/build/pmc2c.pl>.
=head2 Functions
=over 4
=cut
*/
#define INT2KEY(i, k) Parrot_key_new_integer((i), (k))
/* HEADERIZER HFILE: none */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static STRING * caller(PARROT_INTERP, ARGIN_NULLOK(PMC *pmc))
__attribute__nonnull__(1);
PARROT_DOES_NOT_RETURN
static void cant_do_method(PARROT_INTERP, ARGIN_NULLOK(PMC *pmc), int index)
__attribute__nonnull__(1);
PARROT_DOES_NOT_RETURN
static void cant_do_write_method(PARROT_INTERP,
ARGIN_NULLOK(PMC *pmc),
int index)
__attribute__nonnull__(1);
#define ASSERT_ARGS_caller __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_cant_do_method __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_cant_do_write_method __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
=item C<static STRING * caller(PARROT_INTERP, PMC *pmc)>
Returns a C string for the name of C<*pmc>.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static STRING *
caller(PARROT_INTERP, ARGIN_NULLOK(PMC *pmc))
{
ASSERT_ARGS(caller)
return !PMC_IS_NULL(pmc) && pmc->vtable && pmc->vtable->whoami
? VTABLE_name(interp, pmc)
: CONST_STRING(interp, "(null)");
}
/*
=item C<static void cant_do_method(PARROT_INTERP, PMC *pmc, int index)>
Throws an exception "$methname() not implemented in class '$class'", used by
all unimplemented messages.
=cut
*/
PARROT_DOES_NOT_RETURN
static void
cant_do_method(PARROT_INTERP, ARGIN_NULLOK(PMC *pmc), int index)
{
ASSERT_ARGS(cant_do_method)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_ILL_INHERIT,
"%s() not implemented in class '%Ss'",
Parrot_get_vtable_name(interp, index),
caller(interp, pmc));
}
/*
=item C<static void cant_do_write_method(PARROT_INTERP, PMC *pmc, int index)>
Throws an exception "$methname() on read-only instance of '$class'", used by
all updating messages on read-only instances.
=cut
*/
PARROT_DOES_NOT_RETURN
static void
cant_do_write_method(PARROT_INTERP, ARGIN_NULLOK(PMC *pmc), int index)
{
ASSERT_ARGS(cant_do_write_method)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_WRITE_TO_CONSTCLASS,
"%s() in read-only instance of '%Ss'",
Parrot_get_vtable_name(interp, index),
caller(interp, pmc));
}
pmclass default abstract {
/*
=back
=head2 Methods
=over 4
=item C<void init()>
Does nothing.
=cut
*/
VTABLE void init() {
UNUSED(INTERP);
UNUSED(SELF);
}
/*
=item C<void init_pmc(PMC *initializer)>
With a null C<initializer>, calls C<init()>, else throws an exception.
=cut
*/
VTABLE void init_pmc(PMC *initializer) {
if (PMC_IS_NULL(initializer))
SELF.init();
else
Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_ILL_INHERIT,
"init_pmc() not implemented in class '%Ss'",
caller(INTERP, SELF));
}
/*
=item C<void init_int(INTVAL initvalue)>
Calls C<init()> and C<set_integer_native(initvalue)>.
Default implementation to allow more usages of init_int without having to
implement it everywhere.
=cut
*/
VTABLE void init_int(INTVAL initvalue) {
SELF.init();
SELF.set_integer_native(initvalue);
}
/*
=item C<void destroy()>
Does nothing.
=cut
*/
VTABLE void destroy() {
UNUSED(INTERP);
UNUSED(SELF);
}
/*
=item C<PMC *instantiate(PMC *init)>
Default fallback. Creates a new PMC of the type of the class SELF and
calls init().
=cut
*/
VTABLE PMC *instantiate(PMC *init) {
const INTVAL type = VTABLE_type(INTERP, SELF);
/* Ensure no looping, as Parrot_pmc_new calls the instantiate vtable entry for
* classes. */
if (PObj_is_class_TEST(SELF))
Parrot_ex_throw_from_c_args(INTERP, NULL, 1,
"All high-level classes should override instantiate");
if (!PMC_IS_NULL(init))
return Parrot_pmc_new_init(INTERP, type, init);
return Parrot_pmc_new(INTERP, type);
}
/*
=item C<void mark()>
Panics with a "no custom mark routine defined" error message.
=cut
*/
VTABLE void mark() {
UNUSED(SELF);
PANIC(INTERP, "custom_mark flag set but no custom mark routine defined");
}
/*
=item C<INTVAL type()>
Returns the PMC's type.
=cut
*/
VTABLE INTVAL type() {
UNUSED(INTERP);
return SELF->vtable->base_type;
}
/*
=item C<STRING *name()>
Returns the name of the PMC.
=cut
*/
VTABLE STRING *name() {
UNUSED(INTERP);
return SELF->vtable->whoami;
}
/*
=item C<void PMC *add_attribute(STRING *name, PMC *type)>
Throws an exception, as you can only add an attribute to something Class-y or
Role-y.
=cut
*/
VTABLE void add_attribute(STRING *name, PMC *type) {
UNUSED(SELF);
UNUSED(name);
UNUSED(type);
Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_INVALID_OPERATION,
"Cannot add attribute to non-class");
}
/*
=item C<PMC *get_namespace>
Return the namespace for this PMC.
=item C<PMC *find_method(STRING *method_name)>
Looks up the method for C<*method_name> and returns it. If no method is
found then C<NULL> is returned.
=item C<void add_method(STRING *method_name, PMC *sub)>
Store the method as a global in the namespace of this class.
=cut
*/
VTABLE PMC *get_namespace() {
/* Because singletons are shared between interpreters, we need to make
* special effort to use the right namespace for method lookups.
* Note that this trick won't work if the singleton inherits from
* something else (because the MRO will still be shared).
* Having this code here avoids creating a special case for singletons
* elsewhere.
*/
return INTERP->vtables[SELF->vtable->base_type]->_namespace;
}
VTABLE PMC *find_method(STRING *method_name) {
return Parrot_find_method_with_cache(INTERP, SELF, method_name);
}
VTABLE void add_method(STRING *method_name, PMC *sub_pmc) {
VTABLE_set_pmc_keyed_str(INTERP, SELF->vtable->_namespace,
method_name, sub_pmc);
}
/*
=item C<INTVAL get_integer_keyed_int(INTVAL key)>
Converts C<key> to a PMC key and returns the result of calling
C<get_integer_keyed()> with it.
=cut
*/
VTABLE INTVAL get_integer_keyed_int(INTVAL key) {
PMC *const r_key = INT2KEY(INTERP, key);
return SELF.get_integer_keyed(r_key);
}
/*
=item C<FLOATVAL get_number_keyed_int(INTVAL key)>
Converts C<key> to a PMC key and returns the result of calling
C<get_number_keyed()> with it.
=cut
*/
VTABLE FLOATVAL get_number_keyed_int(INTVAL key) {
PMC *const r_key = INT2KEY(INTERP, key);
return SELF.get_number_keyed(r_key);
}
/*
=item C<STRING *get_string_keyed_int(INTVAL key)>
Converts C<key> to a PMC key and returns the result of calling
C<get_string_keyed()> with it.
=cut
*/
VTABLE STRING *get_string_keyed_int(INTVAL key) {
PMC *const r_key = INT2KEY(INTERP, key);
return SELF.get_string_keyed(r_key);
}
/*
=item C<PMC *get_pmc_keyed_int(INTVAL key)>
Converts C<key> to a PMC key and returns the result of calling
C<get_pmc_keyed()> with it.
=cut
*/
VTABLE PMC *get_pmc_keyed_int(INTVAL key) {
PMC *const r_key = INT2KEY(INTERP, key);
return SELF.get_pmc_keyed(r_key);
}
/*
=item C<INTVAL is_same(PMC *value)>
Returns whether the PMC is the same PMC as C<value> (whether they're the
same pointer).
=cut
*/
VTABLE INTVAL is_same(PMC *value) {
UNUSED(INTERP);
return SELF == value;
}
/*
=item C<void assign_pmc(PMC *value)>
=item C<void assign_string_native(PMC *value)>
Defaults fall back to C<set_pmc> and C<set_string_native>.
=cut
*/
VTABLE void assign_pmc(PMC *value) {
STRING * const undef = CONST_STRING(INTERP, "Undef");
if (VTABLE_isa(INTERP, value, undef))
Parrot_pmc_reuse(INTERP, SELF, value->vtable->base_type, 0);
else
SELF.set_pmc(value);
}
VTABLE void assign_string_native(STRING *value) {
SELF.set_string_native(value);
}
/*
=item C<void morph(PMC* type)>
Changes the PMC to a PMC of a new type
=cut
*/
VTABLE void morph(PMC* type) {
Parrot_pmc_reuse(INTERP, SELF, VTABLE_get_integer(INTERP, type), 0);
}
/*
=item C<void set_integer_keyed_int(INTVAL key, INTVAL value)>
Converts C<key> to a PMC key and calls C<set_integer_keyed()> with it
and C<value>.
=cut
*/
VTABLE void set_integer_keyed_int(INTVAL key, INTVAL value) {
PMC *const r_key = INT2KEY(INTERP, key);
SELF.set_integer_keyed(r_key, value);
}
/*
=item C<void set_number_keyed_int(INTVAL key, FLOATVAL value)>
Converts C<key> to a PMC key and calls C<set_number_keyed()> with it
and C<value>.
=cut
*/
VTABLE void set_number_keyed_int(INTVAL key, FLOATVAL value) {
PMC *const r_key = INT2KEY(INTERP, key);
SELF.set_number_keyed(r_key, value);
}
/*
=item C<void set_string_keyed_int(INTVAL key, STRING *string)>
Converts C<key> to a PMC key and calls C<set_string_keyed()> with it
and C<value>.
=cut
*/
VTABLE void set_string_keyed_int(INTVAL key, STRING *string) {
PMC *const r_key = INT2KEY(INTERP, key);
SELF.set_string_keyed(r_key, string);
}
/*
=item C<void set_pmc_keyed_int(INTVAL key, PMC *value)>
Converts C<key> to a PMC key and calls C<set_pmc_keyed()> with it
and C<value>.
=cut
*/
VTABLE void set_pmc_keyed_int(INTVAL key, PMC *value) {
PMC *const r_key = INT2KEY(INTERP, key);
SELF.set_pmc_keyed(r_key, value);
}
/*
=item C<INTVAL hashvalue()>
Calculate hashvalue for PMC. Default behaviour stringify and use string.
=cut
*/
VTABLE INTVAL hashvalue() {
STRING * const s = SELF.get_string();
return STRING_hash(INTERP, s, INTERP->hash_seed);
}
/*
=item C<INTVAL is_equal(PMC *value)>
Default fallback. Performs a multiple dispatch call for 'is_equal'.
=cut
*/
VTABLE INTVAL is_equal(PMC *value) {
INTVAL retval;
Parrot_mmd_multi_dispatch_from_c_args(INTERP,
"is_equal", "PP->I", SELF, value, &retval);
return retval;
}
/*
=item C<INTVAL is_equal_num(PMC *value)>
Default fallback. Performs a multiple dispatch call for 'is_equal_num'.
=cut
*/
VTABLE INTVAL is_equal_num(PMC *value) {
INTVAL retval;
Parrot_mmd_multi_dispatch_from_c_args(INTERP,
"is_equal_num", "PP->I", SELF, value, &retval);
return retval;
}
/*
=item C<INTVAL is_equal_string(PMC *value)>
Default fallback. Performs a multiple dispatch call for 'is_equal'.
=cut
*/
VTABLE INTVAL is_equal_string(PMC *value) {
INTVAL retval;
Parrot_mmd_multi_dispatch_from_c_args(INTERP,
"is_equal_string", "PP->I", SELF, value, &retval);
return retval;
}
/*
=item C<INTVAL exists_keyed_int(INTVAL key)>
Converts C<key> to a PMC key and returns the result of calling
C<exists_keyed()> with it.
=cut
*/
VTABLE INTVAL exists_keyed_int(INTVAL key) {
PMC *const r_key = INT2KEY(INTERP, key);
return SELF.exists_keyed(r_key);
}
/*
=item C<INTVAL defined()>
Returns true.
=cut
*/
VTABLE INTVAL defined() {
UNUSED(INTERP);
UNUSED(SELF);
return 1;
}
/*
=item C<INTVAL defined_keyed_int(INTVAL key)>
Converts C<key> to a PMC key and returns the result of calling
C<defined_keyed()> with it.
=cut
*/
VTABLE INTVAL defined_keyed_int(INTVAL key) {
PMC *const r_key = INT2KEY(INTERP, key);
return SELF.defined_keyed(r_key);
}
/*
=item C<void delete_keyed_int(INTVAL key)>
Converts C<key> to a PMC key and calls C<delete_keyed()> with it.
=cut
*/
VTABLE void delete_keyed_int(INTVAL key) {
PMC *const r_key = INT2KEY(INTERP, key);
SELF.delete_keyed(r_key);
}
/*
=item C<INTVAL does(STRING *interface_name)>
Reports whether the PMC "does" perform C<interface_name>.
If the interface C<interface_name> is found in the PMC's interface list,
true (1) is returned; otherwise, false (0) is returned.
=cut
*/
VTABLE INTVAL does(STRING *interface_name) {
return Parrot_pmc_type_does(INTERP, interface_name, SELF->vtable->base_type);
}
/*
=item C<INTVAL does_pmc(PMC *role)>
Reports whether the PMC "does" the C<role>.
=cut
*/
VTABLE INTVAL does_pmc(PMC *role) {
UNUSED(INTERP);
UNUSED(SELF);
UNUSED(role);
/* No C-level roles yet. */
return 0;
}
/*
=item C<INTVAL isa_pmc(PMC *_class)>
Reports whether the PMC "isa" C<_class>.
If the class C<_class> is found in the PMC's class hierarchy,
true (1) is returned; otherwise, false (0) is returned.
=cut
*/
VTABLE INTVAL isa_pmc(PMC *lookup) {
if (PMC_IS_NULL(lookup))
return 0;
else {
Hash * const isa_hash = SELF->vtable->isa_hash;
STRING * const pmc_name = VTABLE_get_string(INTERP, lookup);
return Parrot_hash_exists(INTERP, isa_hash, pmc_name);
}
}
/*
=item C<INTVAL isa(STRING *_class)>
Reports whether the PMC "isa" C<_class>.
If the class C<_class> is found in the PMC's class hierarchy,
true (1) is returned; otherwise, false (0) is returned.
=cut
*/
VTABLE INTVAL isa(STRING *_class) {
if (SELF->vtable->whoami == _class)
return 1;
else {
const Hash * const isa_hash = SELF->vtable->isa_hash;
if (!isa_hash)
return STRING_equal(INTERP, SELF->vtable->whoami, _class);
return Parrot_hash_exists(INTERP, isa_hash, (void *)_class);
}
}
/*
=item C<PMC *inspect_str(STRING *what)>
Provides introspection of a specific piece of information about the PMC.
=cut
*/
VTABLE PMC *inspect_str(STRING *name) {
if (STRING_equal(INTERP, name, CONST_STRING(INTERP, "flags"))) {
PMC * const found = Parrot_pmc_new_init_int(INTERP, enum_class_Integer,
(INTVAL)PObj_get_FLAGS(SELF));
return found;
}
else if (STRING_equal(INTERP, name, CONST_STRING(INTERP, "mro"))) {
return VTABLE_clone(INTERP, SELF->vtable->mro);
}
else
Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_INVALID_OPERATION,
"Unknown introspection value '%S'", name);
}
/*
=item C<PMC *inspect()>
Returns a Hash describing the class, with key/value pairs as described in
inspect_str.
=cut
*/
VTABLE PMC *inspect() {
PMC * const metadata = Parrot_pmc_new(INTERP, enum_class_Hash);
STRING * const flags_str = CONST_STRING(INTERP, "flags");
VTABLE_set_pmc_keyed_str(INTERP, metadata, flags_str,
VTABLE_inspect_str(INTERP, SELF, flags_str));
return metadata;
}
/*
=item C<PMC *get_class()>
Returns the class or PMCProxy of the type of the PMC.
=cut
*/
VTABLE PMC *get_class() {
PMC * const ns = VTABLE_get_namespace(INTERP, SELF);
PMC *_class = PMCNULL;
if (!PMC_IS_NULL(ns))
_class = VTABLE_get_class(INTERP, ns);
if (PMC_IS_NULL(_class)) {
const INTVAL type = VTABLE_type(INTERP, SELF);
return Parrot_pmc_new_init_int(INTERP, enum_class_PMCProxy, type);
}
return _class;
}
/*
=item C<PMC *get_attr_keyed(PMC *key, STRING *name)>
Default version of keyed attribute lookups. Discards the key and does a lookup
by the string name passed in.
=item C<void set_attr_keyed(PMC *key, STRING *name, PMC *value)>
Default version of keyed attribute set. Discards the key and does a set by
the string name passed in.
=cut
*/
VTABLE PMC *get_attr_keyed(PMC *key, STRING *name) {
UNUSED(key)
return VTABLE_get_attr_str(INTERP, SELF, name);
}
VTABLE void set_attr_keyed(PMC *key, STRING *name, PMC *value) {
UNUSED(key)
VTABLE_set_attr_str(INTERP, SELF, name, value);
}
/*
=item C<void add_parent(PMC *parent)>
Add class C<parent> to the list of our parents.
=cut
*/
VTABLE void add_parent(PMC *parent) {
UNUSED(parent);
if (!PObj_is_class_TEST(SELF))
Parrot_ex_throw_from_c_args(INTERP, NULL, 1,
"Only classes can be subclassed");
Parrot_ex_throw_from_c_args(INTERP, NULL, 1,
"All classes should override add_parent");
}
/*
=item C<void visit(PMC *info)>
Used by GC to mark the PMC.
=cut
*/
VTABLE void visit(PMC *info) {
UNUSED(INTERP);
UNUSED(SELF);
UNUSED(info);
}
/*
=item C<PMC* clone()>
Clones this PMC. By default, this just does a freeze and thaw.
=cut
*/
VTABLE PMC* clone() {
return Parrot_thaw(INTERP, Parrot_freeze(INTERP, SELF));
}
/*
=item C<void freeze(PMC *info)>
Does nothing.
=cut
*/
VTABLE void freeze(PMC *info) {
UNUSED(INTERP);
UNUSED(SELF);
UNUSED(info);
/* default - no action */
}
/*
=item C<void thaw(PMC *info)>
Initializes the PMC during unarchiving.
=cut
*/
VTABLE void thaw(PMC *info) {
UNUSED(info);
/* default - initialize the PMC */
SELF.init();
}
/*
=item C<void thawfinish(PMC *info)>
Does nothing.
=cut
*/
VTABLE void thawfinish(PMC *info) {
UNUSED(INTERP);
UNUSED(SELF);
UNUSED(info);
/* default - no action */
}
/*
=item C<PMC *add(PMC *value, PMC *dest)>
Default fallback. Performs a multiple dispatch call for 'add'.
=cut
*/
VTABLE PMC *add(PMC *value, PMC *dest) {
PMC *result = PMCNULL;
Parrot_mmd_multi_dispatch_from_c_args(INTERP,
"add", "PPP->P", SELF, value, dest, &result);
return result;
}
/*
=item C<PMC *add_int(INTVAL value, PMC *dest)>
Default fallback. Performs a multiple dispatch call for 'add_int'.
=cut
*/
VTABLE PMC *add_int(INTVAL value, PMC *dest) {
PMC *result = PMCNULL;
Parrot_mmd_multi_dispatch_from_c_args(INTERP,
"add_int", "PIP->P", SELF, value, dest, &result);
return result;
}
/*
=item C<PMC *add_float(FLOATVAL value, PMC *dest)>
Default fallback. Performs a multiple dispatch call for 'add_float'.
=cut
*/
VTABLE PMC *add_float(FLOATVAL value, PMC *dest) {
dest = Parrot_pmc_new(INTERP, VTABLE_type(INTERP, SELF));
VTABLE_set_number_native(INTERP, dest,
SELF.get_number() + value);
return dest;
}
/*
=item C<void i_add(PMC *value)>
Default fallback. Performs a multiple dispatch call for 'i_add'.
=cut
*/
VTABLE void i_add(PMC *value) {
Parrot_mmd_multi_dispatch_from_c_args(INTERP,
"i_add", "PP", SELF, value);
}
/*
=item C<void i_add_int(INTVAL value)>
Default fallback. Performs a multiple dispatch call for 'i_add_int'.
=cut
*/
VTABLE void i_add_int(INTVAL value) {
Parrot_mmd_multi_dispatch_from_c_args(INTERP,
"i_add_int", "PI", SELF, value);
}
/*