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/* Copyright (c) 2005 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* This module covers parsing of a single message received by an object
or used for creation of an object, as well as parsing of multiple messages
contained in an imported buffer, etc. */
#include "m_pd.h"
#include "common/loud.h"
#include "messtree.h"
#ifdef KRZYSZCZ
#define MESSTREE_DEBUG
#endif
/* There are two different messtree structures: the compile-time input
(t_messslot/t_messnode) and the run-time one (t_messtree). The reasons are:
to allow plugins to extend a message tree, and to make the compile-time
input initializer-friendly. */
struct _messtree
{
t_messslot *mt_slot;
t_symbol *mt_selector;
t_messcall mt_method;
int mt_nonexclusive;
struct _messtree *mt_sublist;
struct _messtree *mt_next;
};
t_messtree *messtree_new(t_symbol *selector)
{
t_messtree *mt = getbytes(sizeof(*mt));
mt->mt_slot = 0;
mt->mt_selector = selector;
mt->mt_method = 0; /* LATER define a default */
mt->mt_nonexclusive = 0;
mt->mt_sublist = 0;
mt->mt_next = 0;
return (mt);
}
static void messtree_addnode(t_messtree *mt, t_messnode *mn)
{
/* LATER respect mn->mn_index */
t_messslot *ms;
int i;
for (i = 0, ms = mn->mn_table + mn->mn_nslots - 1;
i < mn->mn_nslots; i++, ms--)
{
t_messtree *bch = messtree_new(gensym(ms->ms_name));
bch->mt_slot = ms;
bch->mt_method = ms->ms_call;
bch->mt_nonexclusive = (ms->ms_flags & MESSTREE_NONEXCLUSIVE);
bch->mt_next = mt->mt_sublist;
mt->mt_sublist = bch;
if (ms->ms_subnode)
messtree_addnode(bch, ms->ms_subnode);
}
}
void messtree_add(t_messtree *mt, t_messnode *rootnode)
{
messtree_addnode(mt, rootnode);
}
t_messtree *messtree_build(t_messslot *rootslot)
{
t_messtree *mt = messtree_new(gensym(rootslot->ms_name));
mt->mt_slot = rootslot;
mt->mt_method = rootslot->ms_call;
mt->mt_nonexclusive = (rootslot->ms_flags & MESSTREE_NONEXCLUSIVE);
mt->mt_sublist = 0;
mt->mt_next = 0;
if (rootslot->ms_subnode)
messtree_addnode(mt, rootslot->ms_subnode);
return (mt);
}
int messtree_doit(t_messtree *mt, t_messslot **msp, int *nargp,
t_pd *target, t_symbol *s, int ac, t_atom *av)
{
int result = MESSTREE_OK, nargpdummy;
t_messslot *mspdummy;
if (!msp)
msp = &mspdummy;
if (!nargp)
nargp = &nargpdummy;
if (s && s != mt->mt_selector)
{
loud_warning(target, (target ? 0 : "messtree"),
"unexpected selector \"%s\"", s->s_name);
*msp = 0;
*nargp = 0;
return (MESSTREE_CORRUPT);
}
if (ac && av->a_type == A_SYMBOL)
{
t_messtree *bch;
for (bch = mt->mt_sublist; bch; bch = bch->mt_next)
{
if (av->a_w.w_symbol == bch->mt_selector)
{
if (bch->mt_sublist)
return (messtree_doit(bch, msp, nargp, target,
av->a_w.w_symbol, ac - 1, av + 1));
else
{
if (target && bch->mt_method)
result = bch->mt_method(target, av->a_w.w_symbol,
ac - 1, av + 1);
*msp = (result == MESSTREE_OK ? bch->mt_slot : 0);
*nargp = ac - 1;
return (result);
}
}
}
if (mt->mt_nonexclusive)
{
if (target && mt->mt_method)
result = mt->mt_method(target, 0, ac, av); /* LATER rethink */
*msp = (result == MESSTREE_OK ? mt->mt_slot : 0);
*nargp = ac;
return (result);
}
else
{
loud_warning(target, (target ? 0 : "messtree"),
"unknown property \"%s\"", av->a_w.w_symbol->s_name);
*msp = 0;
*nargp = 0;
return (MESSTREE_UNKNOWN);
}
}
else
{
if (target && mt->mt_method)
result = mt->mt_method(target, 0, ac, av);
*msp = (result == MESSTREE_OK ? mt->mt_slot : 0);
*nargp = ac;
return (result);
}
}
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