1 files changed, 1394 insertions, 0 deletions

diff --git a/apps/plugins/pdbox/PDa/src/m_obj.c b/apps/plugins/pdbox/PDa/src/m_obj.c
new file mode 100644
index 0000000000..d53da5722e
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/src/m_obj.c
@@ -0,0 +1,1394 @@
+/* Copyright (c) 1997-1999 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/* this file handles Max-style patchable objects, i.e., objects which
+can interconnect via inlets and outlets; also, the (terse) generic
+behavior for "gobjs" appears at the end of this file.  */
+
+#include "m_pd.h"
+#include "m_imp.h"
+
+union inletunion
+{
+    t_symbol *iu_symto;
+    t_gpointer *iu_pointerslot;
+    t_float *iu_floatslot;
+    t_symbol **iu_symslot;
+    t_sample iu_floatsignalvalue;
+};
+
+struct _inlet
+{
+    t_pd i_pd;
+    struct _inlet *i_next;
+    t_object *i_owner;
+    t_pd *i_dest;
+    t_symbol *i_symfrom;
+    union inletunion i_un;
+};
+
+#define i_symto i_un.iu_symto
+#define i_pointerslot i_un.iu_pointerslot
+#define i_floatslot i_un.iu_floatslot
+#define i_symslot i_un.iu_symslot
+
+static t_class *inlet_class, *pointerinlet_class, *floatinlet_class,
+    *symbolinlet_class;
+
+#define ISINLET(pd) ((*(pd) == inlet_class) || \
+    (*(pd) == pointerinlet_class) || \
+    (*(pd) == floatinlet_class) || \
+    (*(pd) == symbolinlet_class))
+
+/* --------------------- generic inlets ala max ------------------ */
+
+t_inlet *inlet_new(t_object *owner, t_pd *dest, t_symbol *s1, t_symbol *s2)
+{
+    t_inlet *x = (t_inlet *)pd_new(inlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = dest;
+    if (s1 == &s_signal)
+        x->i_un.iu_floatsignalvalue = 0;
+    else x->i_symto = s2;
+    x->i_symfrom = s1;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+static void inlet_wrong(t_inlet *x, t_symbol *s)
+{
+    pd_error(x->i_owner, "inlet: expected '%s' but got '%s'",
+        x->i_symfrom->s_name, s->s_name);
+}
+
+    /* LATER figure out how to make these efficient: */
+static void inlet_bang(t_inlet *x)
+{
+    if (x->i_symfrom == &s_bang) 
+        pd_vmess(x->i_dest, x->i_symto, "");
+    else if (!x->i_symfrom) pd_bang(x->i_dest);
+    else inlet_wrong(x, &s_bang);
+}
+
+static void inlet_pointer(t_inlet *x, t_gpointer *gp)
+{
+    if (x->i_symfrom == &s_pointer) 
+        pd_vmess(x->i_dest, x->i_symto, "p", gp);
+    else if (!x->i_symfrom) pd_pointer(x->i_dest, gp);
+    else inlet_wrong(x, &s_pointer);
+}
+
+static void inlet_float(t_inlet *x, t_float f)
+{
+    if (x->i_symfrom == &s_float)
+        pd_vmess(x->i_dest, x->i_symto, "f", (t_floatarg)f);
+    else if (x->i_symfrom == &s_signal)
+        x->i_un.iu_floatsignalvalue = ftofix(f);
+    else if (!x->i_symfrom)
+        pd_float(x->i_dest, f);
+    else inlet_wrong(x, &s_float);
+}
+
+static void inlet_symbol(t_inlet *x, t_symbol *s)
+{
+    if (x->i_symfrom == &s_symbol) 
+        pd_vmess(x->i_dest, x->i_symto, "s", s);
+    else if (!x->i_symfrom) pd_symbol(x->i_dest, s);
+    else inlet_wrong(x, &s_symbol);
+}
+
+static void inlet_list(t_inlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_atom at;
+    if (x->i_symfrom == &s_list || x->i_symfrom == &s_float
+        || x->i_symfrom == &s_symbol || x->i_symfrom == &s_pointer)
+            typedmess(x->i_dest, x->i_symto, argc, argv);
+    else if (!x->i_symfrom) pd_list(x->i_dest, s, argc, argv);
+    else inlet_wrong(x, &s_list);
+}
+
+static void inlet_anything(t_inlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    if (x->i_symfrom == s)
+        typedmess(x->i_dest, x->i_symto, argc, argv);
+    else if (!x->i_symfrom)
+        typedmess(x->i_dest, s, argc, argv);
+    else inlet_wrong(x, s);
+}
+
+void inlet_free(t_inlet *x)
+{
+    t_object *y = x->i_owner;
+    t_inlet *x2;
+    if (y->ob_inlet == x) y->ob_inlet = x->i_next;
+    else for (x2 = y->ob_inlet; x2; x2 = x2->i_next)
+        if (x2->i_next == x)
+    {
+        x2->i_next = x->i_next;
+        break;
+    }
+    t_freebytes(x, sizeof(*x));
+}
+
+/* ----- pointerinlets, floatinlets, syminlets: optimized inlets ------- */
+
+static void pointerinlet_pointer(t_inlet *x, t_gpointer *gp)
+{
+    gpointer_unset(x->i_pointerslot);
+    *(x->i_pointerslot) = *gp;
+    if (gp->gp_stub) gp->gp_stub->gs_refcount++;
+}
+
+t_inlet *pointerinlet_new(t_object *owner, t_gpointer *gp)
+{
+    t_inlet *x = (t_inlet *)pd_new(pointerinlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = 0;
+    x->i_symfrom = &s_pointer;
+    x->i_pointerslot = gp;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+static void floatinlet_float(t_inlet *x, t_float f)
+{
+    *(x->i_floatslot) = f;
+}
+
+t_inlet *floatinlet_new(t_object *owner, t_float *fp)
+{
+    t_inlet *x = (t_inlet *)pd_new(floatinlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = 0;
+    x->i_symfrom = &s_float;
+    x->i_floatslot = fp;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+static void symbolinlet_symbol(t_inlet *x, t_symbol *s)
+{
+    *(x->i_symslot) = s;
+}
+
+t_inlet *symbolinlet_new(t_object *owner, t_symbol **sp)
+{
+    t_inlet *x = (t_inlet *)pd_new(symbolinlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = 0;
+    x->i_symfrom = &s_symbol;
+    x->i_symslot = sp;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+/* ---------------------- routine to handle lists ---------------------- */
+
+    /* objects interpret lists by feeding them to the individual inlets.
+    Before you call this check that the object doesn't have a more
+    specific way to handle lists. */
+void obj_list(t_object *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_atom *ap;
+    int count;
+    t_inlet *ip = ((t_object *)x)->ob_inlet;
+    if (!argc) return;
+    for (count = argc-1, ap = argv+1; ip && count--; ap++, ip = ip->i_next)
+    {
+        if (ap->a_type == A_POINTER) pd_pointer(&ip->i_pd, ap->a_w.w_gpointer);
+        else if (ap->a_type == A_FLOAT) pd_float(&ip->i_pd, ap->a_w.w_float);
+        else pd_symbol(&ip->i_pd, ap->a_w.w_symbol);
+    }
+    if (argv->a_type == A_POINTER) pd_pointer(&x->ob_pd, argv->a_w.w_gpointer);
+    else if (argv->a_type == A_FLOAT) pd_float(&x->ob_pd, argv->a_w.w_float);
+    else pd_symbol(&x->ob_pd, argv->a_w.w_symbol);
+} 
+
+void obj_init(void)
+{
+    inlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addbang(inlet_class, inlet_bang);
+    class_addpointer(inlet_class, inlet_pointer);
+    class_addfloat(inlet_class, inlet_float);
+    class_addsymbol(inlet_class, inlet_symbol);
+    class_addlist(inlet_class, inlet_list);
+    class_addanything(inlet_class, inlet_anything);
+
+    pointerinlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addpointer(pointerinlet_class, pointerinlet_pointer);
+
+    floatinlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addfloat(floatinlet_class, (t_method)floatinlet_float);
+
+    symbolinlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addsymbol(symbolinlet_class, symbolinlet_symbol);
+
+}
+
+/* --------------------------- outlets ------------------------------ */
+
+static char *stacklimit, *topstack;
+#define STACKSIZE 1000000
+static int outlet_eventno;
+
+    /* set a stack limit (on each incoming event that can set off messages)
+    for the outlet functions to check to prevent stack overflow from message
+    recursion */
+void outlet_setstacklim(void)
+{
+    char c;
+    topstack = &c;
+    stacklimit = (&c) - STACKSIZE;
+    outlet_eventno++;
+}
+
+    /* get a number unique to the (clock, MIDI, GUI, etc.) event we're on */
+int sched_geteventno( void)
+{
+    return (outlet_eventno);
+}
+
+struct _outconnect
+{
+    struct _outconnect *oc_next;
+    t_pd *oc_to;
+};
+
+struct _outlet
+{
+    t_object *o_owner;
+    struct _outlet *o_next;
+    t_outconnect *o_connections;
+    t_symbol *o_sym;
+};
+
+t_outlet *outlet_new(t_object *owner, t_symbol *s)
+{
+    t_outlet *x = (t_outlet *)getbytes(sizeof(*x)), *y, *y2;
+    x->o_owner = owner;
+    x->o_next = 0;
+    if (y = owner->ob_outlet)
+    {
+        while (y2 = y->o_next) y = y2;
+        y->o_next = x;
+    }
+    else owner->ob_outlet = x;
+    x->o_connections = 0;
+    x->o_sym = s;
+    return (x);
+}
+
+static void outlet_stackerror(t_outlet *x)
+{
+    pd_error(x->o_owner, "stack overflow");
+    stacklimit = topstack;
+}
+
+void outlet_bang(t_outlet *x)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_bang(oc->oc_to);
+}
+
+void outlet_pointer(t_outlet *x, t_gpointer *gp)
+{
+    t_outconnect *oc;
+    t_gpointer gpointer;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else
+    {
+#if 0
+        gpointer_copy(gp, &gpointer);
+        for (oc = x->o_connections; oc; oc = oc->oc_next)
+            pd_pointer(oc->oc_to, &gpointer);
+        gpointer_unset(&gpointer);
+#else
+        gpointer = *gp;
+        for (oc = x->o_connections; oc; oc = oc->oc_next)
+            pd_pointer(oc->oc_to, &gpointer);
+#endif
+    }
+}
+
+void outlet_float(t_outlet *x, t_float f)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_float(oc->oc_to, f);
+}
+
+void outlet_symbol(t_outlet *x, t_symbol *s)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_symbol(oc->oc_to, s);
+}
+
+void outlet_list(t_outlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_list(oc->oc_to, s, argc, argv);
+}
+
+void outlet_anything(t_outlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        typedmess(oc->oc_to, s, argc, argv);
+}
+
+    /* get the outlet's declared symbol */
+t_symbol *outlet_getsymbol(t_outlet *x)
+{
+    return (x->o_sym);
+}
+
+void outlet_free(t_outlet *x)
+{
+    t_object *y = x->o_owner;
+    t_outlet *x2;
+    if (y->ob_outlet == x) y->ob_outlet = x->o_next;
+    else for (x2 = y->ob_outlet; x2; x2 = x2->o_next)
+        if (x2->o_next == x)
+    {
+        x2->o_next = x->o_next;
+        break;
+    }
+    t_freebytes(x, sizeof(*x));
+}
+
+t_outconnect *obj_connect(t_object *source, int outno,
+    t_object *sink, int inno)
+{
+    t_inlet *i;
+    t_outlet *o;
+    t_pd *to;
+    t_outconnect *oc, *oc2;
+    
+    for (o = source->ob_outlet; o && outno; o = o->o_next, outno--) ;
+    if (!o) return (0);
+    
+    if (sink->ob_pd->c_firstin)
+    {
+        if (!inno)
+        {
+            to = &sink->ob_pd;
+            goto doit;
+        }
+        else inno--;
+    }
+    for (i = sink->ob_inlet; i && inno; i = i->i_next, inno--) ;
+    if (!i) return (0);
+    to = &i->i_pd;
+doit:
+    oc = (t_outconnect *)t_getbytes(sizeof(*oc));
+    oc->oc_next = 0;
+    oc->oc_to = to;
+        /* append it to the end of the list */
+        /* LATER we might cache the last "oc" to make this faster. */
+    if ((oc2 = o->o_connections))
+    {
+        while (oc2->oc_next) oc2 = oc2->oc_next;
+        oc2->oc_next = oc;
+    }
+    else o->o_connections = oc;
+    if (o->o_sym == &s_signal) canvas_update_dsp();
+
+    return (oc);
+}
+
+void obj_disconnect(t_object *source, int outno, t_object *sink, int inno)
+{
+    t_inlet *i;
+    t_outlet *o;
+    t_pd *to;
+    t_outconnect *oc, *oc2;
+    
+    for (o = source->ob_outlet; o && outno; o = o->o_next, outno--)
+    if (!o) return;
+    if (sink->ob_pd->c_firstin)
+    {
+        if (!inno)
+        {
+            to = &sink->ob_pd;
+            goto doit;
+        }
+        else inno--;
+    }
+    for (i = sink->ob_inlet; i && inno; i = i->i_next, inno--) ;
+    if (!i) return;
+    to = &i->i_pd;
+doit:
+    if (!(oc = o->o_connections)) return;
+    if (oc->oc_to == to)
+    {
+        o->o_connections = oc->oc_next;
+        freebytes(oc, sizeof(*oc));
+        goto done;
+    }
+    while (oc2 = oc->oc_next)
+    {
+        if (oc2->oc_to == to)
+        {
+            oc->oc_next = oc2->oc_next;
+            freebytes(oc2, sizeof(*oc2));
+            goto done;
+        }
+        oc = oc2;
+    }
+done:
+    if (o->o_sym == &s_signal) canvas_update_dsp();
+}
+
+/* ------ traversal routines for code that can't see our structures ------ */
+
+int obj_noutlets(t_object *x)
+{
+    int n;
+    t_outlet *o;
+    for (o = x->ob_outlet, n = 0; o; o = o->o_next) n++;
+    return (n);
+}
+
+int obj_ninlets(t_object *x)
+{
+    int n;
+    t_inlet *i;
+    for (i = x->ob_inlet, n = 0; i; i = i->i_next) n++;
+    if (x->ob_pd->c_firstin) n++;
+    return (n);
+}
+
+t_outconnect *obj_starttraverseoutlet(t_object *x, t_outlet **op, int nout)
+{
+    t_outlet *o = x->ob_outlet;
+    while (nout-- && o) o = o->o_next;
+    *op = o;
+    if (o) return (o->o_connections);
+    else return (0);
+}
+
+t_outconnect *obj_nexttraverseoutlet(t_outconnect *lastconnect,
+    t_object **destp, t_inlet **inletp, int *whichp)
+{
+    t_pd *y;
+    y = lastconnect->oc_to;
+    if (ISINLET(y))
+    {
+        int n;
+        t_inlet *i = (t_inlet *)y, *i2;
+        t_object *dest = i->i_owner;
+        for (n = dest->ob_pd->c_firstin, i2 = dest->ob_inlet;
+            i2 && i2 != i; i2 = i2->i_next) n++;
+        *whichp = n;
+        *destp = dest;
+        *inletp = i;
+    }
+    else
+    {
+        *whichp = 0;
+        *inletp = 0;
+        *destp = ((t_object *)y);
+    }
+    return (lastconnect->oc_next);
+}
+
+    /* this one checks that a pd is indeed a patchable object, and returns
+    it, correctly typed, or zero if the check failed. */
+t_object *pd_checkobject(t_pd *x)
+{
+    if ((*x)->c_patchable) return ((t_object *)x);
+    else return (0);
+}
+
+    /* move an inlet or outlet to the head of the list */
+void obj_moveinletfirst(t_object *x, t_inlet *i)
+{
+    t_inlet *i2;
+    if (x->ob_inlet == i) return;
+    else for (i2 = x->ob_inlet; i2; i2 = i2->i_next)
+        if (i2->i_next == i)
+    {
+        i2->i_next = i->i_next;
+        i->i_next = x->ob_inlet;
+        x->ob_inlet = i;
+        return;
+    }
+}
+
+void obj_moveoutletfirst(t_object *x, t_outlet *o)
+{
+    t_outlet *o2;
+    if (x->ob_outlet == o) return;
+    else for (o2 = x->ob_outlet; o2; o2 = o2->o_next)
+        if (o2->o_next == o)
+    {
+        o2->o_next = o->o_next;
+        o->o_next = x->ob_outlet;
+        x->ob_outlet = o;
+        return;
+    }
+}
+
+    /* routines for DSP sorting, which are used in d_ugen.c and g_canvas.c */
+    /* LATER try to consolidate all the slightly different routines. */
+
+int obj_nsiginlets(t_object *x)
+{
+    int n;
+    t_inlet *i;
+    for (i = x->ob_inlet, n = 0; i; i = i->i_next)
+        if (i->i_symfrom == &s_signal) n++;
+    if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin) n++;
+    return (n);
+}
+
+    /* get the index, among signal inlets, of the mth inlet overall */
+int obj_siginletindex(t_object *x, int m)
+{
+    int n = 0;
+    t_inlet *i;
+    if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin)
+    {
+        if (!m--) return (0);
+        n++;
+    }
+    for (i = x->ob_inlet; i; i = i->i_next, m--)
+        if (i->i_symfrom == &s_signal)
+    {
+        if (m == 0) return (n);
+        n++;
+    }
+    return (-1);
+}
+
+int obj_issignalinlet(t_object *x, int m)
+{
+    t_inlet *i;
+    if (x->ob_pd->c_firstin)
+    {
+        if (!m)
+            return (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin);
+        else m--;
+    }
+    for (i = x->ob_inlet; i && m; i = i->i_next, m--)
+        ;
+    return (i && (i->i_symfrom == &s_signal));
+}
+
+int obj_nsigoutlets(t_object *x)
+{
+    int n;
+    t_outlet *o;
+    for (o = x->ob_outlet, n = 0; o; o = o->o_next)
+        if (o->o_sym == &s_signal) n++;
+    return (n);
+}
+
+int obj_sigoutletindex(t_object *x, int m)
+{
+    int n;
+    t_outlet *o2;
+    for (o2 = x->ob_outlet, n = 0; o2; o2 = o2->o_next, m--)
+        if (o2->o_sym == &s_signal)
+    {
+        if (m == 0) return (n);
+        n++;
+    }
+    return (-1);
+}
+
+int obj_issignaloutlet(t_object *x, int m)
+{
+    int n;
+    t_outlet *o2;
+    for (o2 = x->ob_outlet, n = 0; o2 && m--; o2 = o2->o_next);
+    return (o2 && (o2->o_sym == &s_signal));
+}
+
+t_sample *obj_findsignalscalar(t_object *x, int m)
+{
+    int n = 0;
+    t_inlet *i;
+    if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin)
+    {
+        if (!m--)
+            return (x->ob_pd->c_floatsignalin > 0 ?
+                (t_sample *)(((char *)x) + x->ob_pd->c_floatsignalin) : 0);
+        n++;
+    }
+    for (i = x->ob_inlet; i; i = i->i_next, m--)
+        if (i->i_symfrom == &s_signal)
+    {
+        if (m == 0)
+            return (&i->i_un.iu_floatsignalvalue);
+        n++;
+    }
+    return (0);
+}
+
+/* and these are only used in g_io.c... */
+
+int inlet_getsignalindex(t_inlet *x)
+{
+    int n = 0;
+    t_inlet *i;
+    for (i = x->i_owner->ob_inlet, n = 0; i && i != x; i = i->i_next)
+        if (i->i_symfrom == &s_signal) n++;
+    return (n);
+}
+
+int outlet_getsignalindex(t_outlet *x)
+{
+    int n = 0;
+    t_outlet *o;
+    for (o = x->o_owner->ob_outlet, n = 0; o && o != x; o = o->o_next) 
+        if (o->o_sym == &s_signal) n++;
+    return (n);
+}
+
+/* Copyright (c) 1997-1999 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/* this file handles Max-style patchable objects, i.e., objects which
+can interconnect via inlets and outlets; also, the (terse) generic
+behavior for "gobjs" appears at the end of this file.  */
+
+#include "m_pd.h"
+#include "m_imp.h"
+
+union inletunion
+{
+    t_symbol *iu_symto;
+    t_gpointer *iu_pointerslot;
+    t_float *iu_floatslot;
+    t_symbol **iu_symslot;
+    t_sample iu_floatsignalvalue;
+};
+
+struct _inlet
+{
+    t_pd i_pd;
+    struct _inlet *i_next;
+    t_object *i_owner;
+    t_pd *i_dest;
+    t_symbol *i_symfrom;
+    union inletunion i_un;
+};
+
+#define i_symto i_un.iu_symto
+#define i_pointerslot i_un.iu_pointerslot
+#define i_floatslot i_un.iu_floatslot
+#define i_symslot i_un.iu_symslot
+
+static t_class *inlet_class, *pointerinlet_class, *floatinlet_class,
+    *symbolinlet_class;
+
+#define ISINLET(pd) ((*(pd) == inlet_class) || \
+    (*(pd) == pointerinlet_class) || \
+    (*(pd) == floatinlet_class) || \
+    (*(pd) == symbolinlet_class))
+
+/* --------------------- generic inlets ala max ------------------ */
+
+t_inlet *inlet_new(t_object *owner, t_pd *dest, t_symbol *s1, t_symbol *s2)
+{
+    t_inlet *x = (t_inlet *)pd_new(inlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = dest;
+    if (s1 == &s_signal)
+        x->i_un.iu_floatsignalvalue = 0;
+    else x->i_symto = s2;
+    x->i_symfrom = s1;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+static void inlet_wrong(t_inlet *x, t_symbol *s)
+{
+    pd_error(x->i_owner, "inlet: expected '%s' but got '%s'",
+        x->i_symfrom->s_name, s->s_name);
+}
+
+    /* LATER figure out how to make these efficient: */
+static void inlet_bang(t_inlet *x)
+{
+    if (x->i_symfrom == &s_bang) 
+        pd_vmess(x->i_dest, x->i_symto, "");
+    else if (!x->i_symfrom) pd_bang(x->i_dest);
+    else inlet_wrong(x, &s_bang);
+}
+
+static void inlet_pointer(t_inlet *x, t_gpointer *gp)
+{
+    if (x->i_symfrom == &s_pointer) 
+        pd_vmess(x->i_dest, x->i_symto, "p", gp);
+    else if (!x->i_symfrom) pd_pointer(x->i_dest, gp);
+    else inlet_wrong(x, &s_pointer);
+}
+
+static void inlet_float(t_inlet *x, t_float f)
+{
+    if (x->i_symfrom == &s_float)
+        pd_vmess(x->i_dest, x->i_symto, "f", (t_floatarg)f);
+    else if (x->i_symfrom == &s_signal)
+        x->i_un.iu_floatsignalvalue = ftofix(f);
+    else if (!x->i_symfrom)
+        pd_float(x->i_dest, f);
+    else inlet_wrong(x, &s_float);
+}
+
+static void inlet_symbol(t_inlet *x, t_symbol *s)
+{
+    if (x->i_symfrom == &s_symbol) 
+        pd_vmess(x->i_dest, x->i_symto, "s", s);
+    else if (!x->i_symfrom) pd_symbol(x->i_dest, s);
+    else inlet_wrong(x, &s_symbol);
+}
+
+static void inlet_list(t_inlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_atom at;
+    if (x->i_symfrom == &s_list || x->i_symfrom == &s_float
+        || x->i_symfrom == &s_symbol || x->i_symfrom == &s_pointer)
+            typedmess(x->i_dest, x->i_symto, argc, argv);
+    else if (!x->i_symfrom) pd_list(x->i_dest, s, argc, argv);
+    else inlet_wrong(x, &s_list);
+}
+
+static void inlet_anything(t_inlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    if (x->i_symfrom == s)
+        typedmess(x->i_dest, x->i_symto, argc, argv);
+    else if (!x->i_symfrom)
+        typedmess(x->i_dest, s, argc, argv);
+    else inlet_wrong(x, s);
+}
+
+void inlet_free(t_inlet *x)
+{
+    t_object *y = x->i_owner;
+    t_inlet *x2;
+    if (y->ob_inlet == x) y->ob_inlet = x->i_next;
+    else for (x2 = y->ob_inlet; x2; x2 = x2->i_next)
+        if (x2->i_next == x)
+    {
+        x2->i_next = x->i_next;
+        break;
+    }
+    t_freebytes(x, sizeof(*x));
+}
+
+/* ----- pointerinlets, floatinlets, syminlets: optimized inlets ------- */
+
+static void pointerinlet_pointer(t_inlet *x, t_gpointer *gp)
+{
+    gpointer_unset(x->i_pointerslot);
+    *(x->i_pointerslot) = *gp;
+    if (gp->gp_stub) gp->gp_stub->gs_refcount++;
+}
+
+t_inlet *pointerinlet_new(t_object *owner, t_gpointer *gp)
+{
+    t_inlet *x = (t_inlet *)pd_new(pointerinlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = 0;
+    x->i_symfrom = &s_pointer;
+    x->i_pointerslot = gp;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+static void floatinlet_float(t_inlet *x, t_float f)
+{
+    *(x->i_floatslot) = f;
+}
+
+t_inlet *floatinlet_new(t_object *owner, t_float *fp)
+{
+    t_inlet *x = (t_inlet *)pd_new(floatinlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = 0;
+    x->i_symfrom = &s_float;
+    x->i_floatslot = fp;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+static void symbolinlet_symbol(t_inlet *x, t_symbol *s)
+{
+    *(x->i_symslot) = s;
+}
+
+t_inlet *symbolinlet_new(t_object *owner, t_symbol **sp)
+{
+    t_inlet *x = (t_inlet *)pd_new(symbolinlet_class), *y, *y2;
+    x->i_owner = owner;
+    x->i_dest = 0;
+    x->i_symfrom = &s_symbol;
+    x->i_symslot = sp;
+    x->i_next = 0;
+    if (y = owner->ob_inlet)
+    {
+        while (y2 = y->i_next) y = y2;
+        y->i_next = x;
+    }
+    else owner->ob_inlet = x;
+    return (x);
+}
+
+/* ---------------------- routine to handle lists ---------------------- */
+
+    /* objects interpret lists by feeding them to the individual inlets.
+    Before you call this check that the object doesn't have a more
+    specific way to handle lists. */
+void obj_list(t_object *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_atom *ap;
+    int count;
+    t_inlet *ip = ((t_object *)x)->ob_inlet;
+    if (!argc) return;
+    for (count = argc-1, ap = argv+1; ip && count--; ap++, ip = ip->i_next)
+    {
+        if (ap->a_type == A_POINTER) pd_pointer(&ip->i_pd, ap->a_w.w_gpointer);
+        else if (ap->a_type == A_FLOAT) pd_float(&ip->i_pd, ap->a_w.w_float);
+        else pd_symbol(&ip->i_pd, ap->a_w.w_symbol);
+    }
+    if (argv->a_type == A_POINTER) pd_pointer(&x->ob_pd, argv->a_w.w_gpointer);
+    else if (argv->a_type == A_FLOAT) pd_float(&x->ob_pd, argv->a_w.w_float);
+    else pd_symbol(&x->ob_pd, argv->a_w.w_symbol);
+} 
+
+void obj_init(void)
+{
+    inlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addbang(inlet_class, inlet_bang);
+    class_addpointer(inlet_class, inlet_pointer);
+    class_addfloat(inlet_class, inlet_float);
+    class_addsymbol(inlet_class, inlet_symbol);
+    class_addlist(inlet_class, inlet_list);
+    class_addanything(inlet_class, inlet_anything);
+
+    pointerinlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addpointer(pointerinlet_class, pointerinlet_pointer);
+
+    floatinlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addfloat(floatinlet_class, (t_method)floatinlet_float);
+
+    symbolinlet_class = class_new(gensym("inlet"), 0, 0,
+        sizeof(t_inlet), CLASS_PD, 0);
+    class_addsymbol(symbolinlet_class, symbolinlet_symbol);
+
+}
+
+/* --------------------------- outlets ------------------------------ */
+
+static char *stacklimit, *topstack;
+#define STACKSIZE 1000000
+static int outlet_eventno;
+
+    /* set a stack limit (on each incoming event that can set off messages)
+    for the outlet functions to check to prevent stack overflow from message
+    recursion */
+void outlet_setstacklim(void)
+{
+    char c;
+    topstack = &c;
+    stacklimit = (&c) - STACKSIZE;
+    outlet_eventno++;
+}
+
+    /* get a number unique to the (clock, MIDI, GUI, etc.) event we're on */
+int sched_geteventno( void)
+{
+    return (outlet_eventno);
+}
+
+struct _outconnect
+{
+    struct _outconnect *oc_next;
+    t_pd *oc_to;
+};
+
+struct _outlet
+{
+    t_object *o_owner;
+    struct _outlet *o_next;
+    t_outconnect *o_connections;
+    t_symbol *o_sym;
+};
+
+t_outlet *outlet_new(t_object *owner, t_symbol *s)
+{
+    t_outlet *x = (t_outlet *)getbytes(sizeof(*x)), *y, *y2;
+    x->o_owner = owner;
+    x->o_next = 0;
+    if (y = owner->ob_outlet)
+    {
+        while (y2 = y->o_next) y = y2;
+        y->o_next = x;
+    }
+    else owner->ob_outlet = x;
+    x->o_connections = 0;
+    x->o_sym = s;
+    return (x);
+}
+
+static void outlet_stackerror(t_outlet *x)
+{
+    pd_error(x->o_owner, "stack overflow");
+    stacklimit = topstack;
+}
+
+void outlet_bang(t_outlet *x)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_bang(oc->oc_to);
+}
+
+void outlet_pointer(t_outlet *x, t_gpointer *gp)
+{
+    t_outconnect *oc;
+    t_gpointer gpointer;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else
+    {
+#if 0
+        gpointer_copy(gp, &gpointer);
+        for (oc = x->o_connections; oc; oc = oc->oc_next)
+            pd_pointer(oc->oc_to, &gpointer);
+        gpointer_unset(&gpointer);
+#else
+        gpointer = *gp;
+        for (oc = x->o_connections; oc; oc = oc->oc_next)
+            pd_pointer(oc->oc_to, &gpointer);
+#endif
+    }
+}
+
+void outlet_float(t_outlet *x, t_float f)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_float(oc->oc_to, f);
+}
+
+void outlet_symbol(t_outlet *x, t_symbol *s)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_symbol(oc->oc_to, s);
+}
+
+void outlet_list(t_outlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        pd_list(oc->oc_to, s, argc, argv);
+}
+
+void outlet_anything(t_outlet *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_outconnect *oc;
+    char c;
+    if (&c < stacklimit)
+        outlet_stackerror(x);
+    else for (oc = x->o_connections; oc; oc = oc->oc_next)
+        typedmess(oc->oc_to, s, argc, argv);
+}
+
+    /* get the outlet's declared symbol */
+t_symbol *outlet_getsymbol(t_outlet *x)
+{
+    return (x->o_sym);
+}
+
+void outlet_free(t_outlet *x)
+{
+    t_object *y = x->o_owner;
+    t_outlet *x2;
+    if (y->ob_outlet == x) y->ob_outlet = x->o_next;
+    else for (x2 = y->ob_outlet; x2; x2 = x2->o_next)
+        if (x2->o_next == x)
+    {
+        x2->o_next = x->o_next;
+        break;
+    }
+    t_freebytes(x, sizeof(*x));
+}
+
+t_outconnect *obj_connect(t_object *source, int outno,
+    t_object *sink, int inno)
+{
+    t_inlet *i;
+    t_outlet *o;
+    t_pd *to;
+    t_outconnect *oc, *oc2;
+    
+    for (o = source->ob_outlet; o && outno; o = o->o_next, outno--) ;
+    if (!o) return (0);
+    
+    if (sink->ob_pd->c_firstin)
+    {
+        if (!inno)
+        {
+            to = &sink->ob_pd;
+            goto doit;
+        }
+        else inno--;
+    }
+    for (i = sink->ob_inlet; i && inno; i = i->i_next, inno--) ;
+    if (!i) return (0);
+    to = &i->i_pd;
+doit:
+    oc = (t_outconnect *)t_getbytes(sizeof(*oc));
+    oc->oc_next = 0;
+    oc->oc_to = to;
+        /* append it to the end of the list */
+        /* LATER we might cache the last "oc" to make this faster. */
+    if ((oc2 = o->o_connections))
+    {
+        while (oc2->oc_next) oc2 = oc2->oc_next;
+        oc2->oc_next = oc;
+    }
+    else o->o_connections = oc;
+    if (o->o_sym == &s_signal) canvas_update_dsp();
+
+    return (oc);
+}
+
+void obj_disconnect(t_object *source, int outno, t_object *sink, int inno)
+{
+    t_inlet *i;
+    t_outlet *o;
+    t_pd *to;
+    t_outconnect *oc, *oc2;
+    
+    for (o = source->ob_outlet; o && outno; o = o->o_next, outno--)
+    if (!o) return;
+    if (sink->ob_pd->c_firstin)
+    {
+        if (!inno)
+        {
+            to = &sink->ob_pd;
+            goto doit;
+        }
+        else inno--;
+    }
+    for (i = sink->ob_inlet; i && inno; i = i->i_next, inno--) ;
+    if (!i) return;
+    to = &i->i_pd;
+doit:
+    if (!(oc = o->o_connections)) return;
+    if (oc->oc_to == to)
+    {
+        o->o_connections = oc->oc_next;
+        freebytes(oc, sizeof(*oc));
+        goto done;
+    }
+    while (oc2 = oc->oc_next)
+    {
+        if (oc2->oc_to == to)
+        {
+            oc->oc_next = oc2->oc_next;
+            freebytes(oc2, sizeof(*oc2));
+            goto done;
+        }
+        oc = oc2;
+    }
+done:
+    if (o->o_sym == &s_signal) canvas_update_dsp();
+}
+
+/* ------ traversal routines for code that can't see our structures ------ */
+
+int obj_noutlets(t_object *x)
+{
+    int n;
+    t_outlet *o;
+    for (o = x->ob_outlet, n = 0; o; o = o->o_next) n++;
+    return (n);
+}
+
+int obj_ninlets(t_object *x)
+{
+    int n;
+    t_inlet *i;
+    for (i = x->ob_inlet, n = 0; i; i = i->i_next) n++;
+    if (x->ob_pd->c_firstin) n++;
+    return (n);
+}
+
+t_outconnect *obj_starttraverseoutlet(t_object *x, t_outlet **op, int nout)
+{
+    t_outlet *o = x->ob_outlet;
+    while (nout-- && o) o = o->o_next;
+    *op = o;
+    if (o) return (o->o_connections);
+    else return (0);
+}
+
+t_outconnect *obj_nexttraverseoutlet(t_outconnect *lastconnect,
+    t_object **destp, t_inlet **inletp, int *whichp)
+{
+    t_pd *y;
+    y = lastconnect->oc_to;
+    if (ISINLET(y))
+    {
+        int n;
+        t_inlet *i = (t_inlet *)y, *i2;
+        t_object *dest = i->i_owner;
+        for (n = dest->ob_pd->c_firstin, i2 = dest->ob_inlet;
+            i2 && i2 != i; i2 = i2->i_next) n++;
+        *whichp = n;
+        *destp = dest;
+        *inletp = i;
+    }
+    else
+    {
+        *whichp = 0;
+        *inletp = 0;
+        *destp = ((t_object *)y);
+    }
+    return (lastconnect->oc_next);
+}
+
+    /* this one checks that a pd is indeed a patchable object, and returns
+    it, correctly typed, or zero if the check failed. */
+t_object *pd_checkobject(t_pd *x)
+{
+    if ((*x)->c_patchable) return ((t_object *)x);
+    else return (0);
+}
+
+    /* move an inlet or outlet to the head of the list */
+void obj_moveinletfirst(t_object *x, t_inlet *i)
+{
+    t_inlet *i2;
+    if (x->ob_inlet == i) return;
+    else for (i2 = x->ob_inlet; i2; i2 = i2->i_next)
+        if (i2->i_next == i)
+    {
+        i2->i_next = i->i_next;
+        i->i_next = x->ob_inlet;
+        x->ob_inlet = i;
+        return;
+    }
+}
+
+void obj_moveoutletfirst(t_object *x, t_outlet *o)
+{
+    t_outlet *o2;
+    if (x->ob_outlet == o) return;
+    else for (o2 = x->ob_outlet; o2; o2 = o2->o_next)
+        if (o2->o_next == o)
+    {
+        o2->o_next = o->o_next;
+        o->o_next = x->ob_outlet;
+        x->ob_outlet = o;
+        return;
+    }
+}
+
+    /* routines for DSP sorting, which are used in d_ugen.c and g_canvas.c */
+    /* LATER try to consolidate all the slightly different routines. */
+
+int obj_nsiginlets(t_object *x)
+{
+    int n;
+    t_inlet *i;
+    for (i = x->ob_inlet, n = 0; i; i = i->i_next)
+        if (i->i_symfrom == &s_signal) n++;
+    if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin) n++;
+    return (n);
+}
+
+    /* get the index, among signal inlets, of the mth inlet overall */
+int obj_siginletindex(t_object *x, int m)
+{
+    int n = 0;
+    t_inlet *i;
+    if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin)
+    {
+        if (!m--) return (0);
+        n++;
+    }
+    for (i = x->ob_inlet; i; i = i->i_next, m--)
+        if (i->i_symfrom == &s_signal)
+    {
+        if (m == 0) return (n);
+        n++;
+    }
+    return (-1);
+}
+
+int obj_issignalinlet(t_object *x, int m)
+{
+    t_inlet *i;
+    if (x->ob_pd->c_firstin)
+    {
+        if (!m)
+            return (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin);
+        else m--;
+    }
+    for (i = x->ob_inlet; i && m; i = i->i_next, m--)
+        ;
+    return (i && (i->i_symfrom == &s_signal));
+}
+
+int obj_nsigoutlets(t_object *x)
+{
+    int n;
+    t_outlet *o;
+    for (o = x->ob_outlet, n = 0; o; o = o->o_next)
+        if (o->o_sym == &s_signal) n++;
+    return (n);
+}
+
+int obj_sigoutletindex(t_object *x, int m)
+{
+    int n;
+    t_outlet *o2;
+    for (o2 = x->ob_outlet, n = 0; o2; o2 = o2->o_next, m--)
+        if (o2->o_sym == &s_signal)
+    {
+        if (m == 0) return (n);
+        n++;
+    }
+    return (-1);
+}
+
+int obj_issignaloutlet(t_object *x, int m)
+{
+    int n;
+    t_outlet *o2;
+    for (o2 = x->ob_outlet, n = 0; o2 && m--; o2 = o2->o_next);
+    return (o2 && (o2->o_sym == &s_signal));
+}
+
+t_sample *obj_findsignalscalar(t_object *x, int m)
+{
+    int n = 0;
+    t_inlet *i;
+    if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin)
+    {
+        if (!m--)
+            return (x->ob_pd->c_floatsignalin > 0 ?
+                (t_sample *)(((char *)x) + x->ob_pd->c_floatsignalin) : 0);
+        n++;
+    }
+    for (i = x->ob_inlet; i; i = i->i_next, m--)
+        if (i->i_symfrom == &s_signal)
+    {
+        if (m == 0)
+            return (&i->i_un.iu_floatsignalvalue);
+        n++;
+    }
+    return (0);
+}
+
+/* and these are only used in g_io.c... */
+
+int inlet_getsignalindex(t_inlet *x)
+{
+    int n = 0;
+    t_inlet *i;
+    for (i = x->i_owner->ob_inlet, n = 0; i && i != x; i = i->i_next)
+        if (i->i_symfrom == &s_signal) n++;
+    return (n);
+}
+
+int outlet_getsignalindex(t_outlet *x)
+{
+    int n = 0;
+    t_outlet *o;
+    for (o = x->o_owner->ob_outlet, n = 0; o && o != x; o = o->o_next) 
+        if (o->o_sym == &s_signal) n++;
+    return (n);
+}
+