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lexpad.pmc
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lexpad.pmc
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/*
Copyright (C) 2007, The Perl Foundation.
$Id$
=head1 NAME
src/pmc/lexpad.pmc - LexPad PMC
=head1 DESCRIPTION
These are the vtable functions for the lexpad PMC.
=head2 Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
/*
* LexPad provides a Hash interface for lexical fetch/store
* needed
*
* struct_val ... parrot_context_t *ctx
* pmc_val ... LexInfo
*/
pmclass LexPad does hash no_ro {
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) {
PMC_pmc_val(SELF) = lexinfo;
}
void set_pointer(void *ctx) {
PMC_struct_val(SELF) = ctx;
}
INTVAL elements() {
PMC *info = PMC_pmc_val(SELF);
return parrot_hash_size(INTERP, (Hash *)PMC_struct_val(info));
}
INTVAL exists_keyed_str(STRING *name) {
PMC * const info = PMC_pmc_val(SELF);
return parrot_hash_get_bucket(INTERP,
(Hash*) PMC_struct_val(info), name) != 0;
}
INTVAL exists_keyed(PMC *name) {
STRING * const s = key_string(INTERP, name);
return SELF.exists_keyed_str(s);
}
PMC *get_pmc_keyed_str(STRING *name) {
PMC * const info = PMC_pmc_val(SELF);
Hash * const hash = (Hash *)PMC_struct_val(info);
parrot_context_t * const ctx = (parrot_context_t *)PMC_struct_val(SELF);
HashBucket * const b = parrot_hash_get_bucket(INTERP, hash, name);
INTVAL regno;
if (!b)
return NULL;
regno = (INTVAL) b->value;
return CTX_REG_PMC(ctx, regno);
}
PMC *get_pmc_keyed(PMC *name) {
STRING * const s = key_string(INTERP, name);
return SELF.get_pmc_keyed_str(s);
}
void set_pmc_keyed_str(STRING *name, PMC *value) {
PMC * const info = PMC_pmc_val(SELF);
Hash * const hash = (Hash *)PMC_struct_val(info);
parrot_context_t * const ctx = (parrot_context_t *)PMC_struct_val(SELF);
HashBucket * const b = parrot_hash_get_bucket(INTERP, hash, name);
INTVAL regno;
if (!b)
real_exception(interp, NULL, LEX_NOT_FOUND,
"Lexical '%Ss' not found", name);
regno = (INTVAL) b->value;
CTX_REG_PMC(ctx, regno) = value;
}
void set_pmc_keyed(PMC *name, PMC *value) {
STRING * const s = key_string(INTERP, name);
SELF.set_pmc_keyed_str(s, value);
}
METHOD PMC *get_lexinfo() {
return PMC_pmc_val(SELF);
}
}
/*
=back
=head1 SEE ALSO
F<docs/pdds/pdd20_lexical_vars.pod>, F<src/pmc/lexinfo.pmc>.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/