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dynlexpad.pmc
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dynlexpad.pmc
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/*
Copyright (C) 2005, The Perl Foundation.
$Id$
=head1 NAME
src/dynpmc/dynlexpad.pmc - DynLexPad PMC
=head1 DESCRIPTION
DynLexPad provides a more dynamic lexpad that allows the addition of
lexicals at runtime.
=head2 Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
pmclass DynLexPad dynpmc does lexpad need_ext {
void init() {
real_exception(INTERP, NULL, INVALID_OPERATION,
"don't create me like this");
}
/*
=item C<init_pmc(PMC *lexinfo)>
Initialize the LexPad PMC and remember the associate
lexinfo.
=item C<void set_pointer(void *)>
Initialize the LexPad PMC and remember the associate context.
=item C<INTVAL elements()>
Returns the number of elements in the hash.
=item C<INTVAL exists_keyed(PMC *name)>
=item C<INTVAL exists_keyed_str(STRING *name)>
Returns whether a lexical C<name> exists in the hash.
=item C<PMC *get_pmc_keyed_str(STRING *name)>
=item C<PMC *get_pmc_keyed(PMC *name)>
Return the lexical with the given name, or NULL (not PMCNULL), if the
lexical doesn't exist.
=item C<void set_pmc_keyed(PMC *name, PMC *value)>
=item C<void set_pmc_keyed_str(STRING *name, PMC *value)>
Set the lexical with the given name to value. If the lexical name
doesn't exist, it is created.
=item C<METHOD PMC* get_lexinfo()>
Return the LexInfo PMC, if any or a Null PMC.
=cut
*/
void init_pmc(PMC* lexinfo) {
if (VTABLE_elements(INTERP, lexinfo)) {
PMC_pmc_val(SELF) =
pmc_new_init(INTERP, enum_class_LexPad, lexinfo);
}
else
PMC_pmc_val(SELF) = NULL;
parrot_new_pmc_hash(INTERP, SELF);
PObj_custom_mark_destroy_SETALL(SELF);
}
void set_pointer(void* ctx) {
PMC *std_pad = PMC_pmc_val(SELF);
if (std_pad)
VTABLE_set_pointer(INTERP, std_pad, ctx);
}
void destroy() {
if (PMC_struct_val(SELF)) {
parrot_hash_destroy(INTERP, (Hash*) PMC_struct_val(SELF));
PMC_struct_val(SELF) = NULL;
}
}
/*
=item C<void mark()>
Marks the lexpad hash as live.
=cut
*/
void mark() {
PMC *std_pad = PMC_pmc_val(SELF);
if (std_pad)
pobject_lives(INTERP, (PObj *)std_pad);
if (PMC_struct_val(SELF))
parrot_mark_hash(INTERP, PMC_struct_val(SELF));
}
PMC* get_pmc_keyed_str(STRING* name) {
HashBucket *b = parrot_hash_get_bucket(INTERP,
(Hash*) PMC_struct_val(SELF), name);
if (!b) {
PMC *std_pad = PMC_pmc_val(SELF);
if (std_pad)
return VTABLE_get_pmc_keyed_str(INTERP, std_pad, name);
return PMCNULL;
}
return b->value;
}
INTVAL exists_keyed_str(STRING* name) {
PMC *std_pad;
if (parrot_hash_get_bucket(INTERP, (Hash*) PMC_struct_val(SELF), name))
return 1;
std_pad = PMC_pmc_val(SELF);
if (std_pad)
return VTABLE_exists_keyed_str(INTERP, std_pad, name);
return 0;
}
INTVAL exists_keyed(PMC* name) {
STRING *s = key_string(INTERP, name);
return SELF.exists_keyed_str(s);
}
PMC* get_pmc_keyed(PMC* name) {
STRING *s = key_string(INTERP, name);
return SELF.get_pmc_keyed_str(s);
}
void set_pmc_keyed_str(STRING* name, PMC* value) {
PMC *std_pad = PMC_pmc_val(SELF);
if (std_pad && VTABLE_exists_keyed_str(INTERP, std_pad, name)) {
VTABLE_set_pmc_keyed_str(INTERP, std_pad, name, value);
}
parrot_hash_put(INTERP, PMC_struct_val(SELF), name, value);
}
void set_pmc_keyed(PMC* name, PMC* value) {
STRING *s = key_string(INTERP, name);
SELF.set_pmc_keyed_str(s, value);
}
}
/*
=back
=head1 SEE ALSO
F<docs/pdds/pdd20_lexical_vars.pod>, F<src/pmc/lexpad.pmc>,
F<src/pmc/lexinfo.pmc>.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/