Add FS #10214. Initial commit of the original PDa code for the GSoC Pure Data plugin project of Wincent Balin. Stripped some non-sourcefiles and added a rockbox readme that needs a bit more info from Wincent. Is added to CATEGORIES and viewers, but not yet to SUBDIRS (ie doesn't build yet)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21044 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 1648 insertions, 0 deletions

diff --git a/apps/plugins/pdbox/PDa/src/m_class.c b/apps/plugins/pdbox/PDa/src/m_class.c
new file mode 100644
index 0000000000..0b6d4df885
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/src/m_class.c
@@ -0,0 +1,1648 @@
+/* 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.  */
+
+#define PD_CLASS_DEF
+#include "m_pd.h"
+#include "m_imp.h"
+#include "s_stuff.h"
+#include <stdlib.h>
+#ifdef UNIX
+#include <unistd.h>
+#endif
+#ifdef MSW
+#include <io.h>
+#endif
+
+#include <stdarg.h>
+#include <string.h>
+
+static t_symbol *class_loadsym;     /* name under which an extern is invoked */
+static void pd_defaultfloat(t_pd *x, t_float f);
+static void pd_defaultlist(t_pd *x, t_symbol *s, int argc, t_atom *argv);
+t_pd pd_objectmaker;    /* factory for creating "object" boxes */
+t_pd pd_canvasmaker;    /* factory for creating canvases */
+
+static t_symbol *class_extern_dir = &s_;
+
+static void pd_defaultanything(t_pd *x, t_symbol *s, int argc, t_atom *argv)
+{
+    pd_error(x, "%s: no method for '%s'", (*x)->c_name->s_name, s->s_name);
+}
+
+static void pd_defaultbang(t_pd *x)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+        (*(*x)->c_listmethod)(x, 0, 0, 0);
+    else (*(*x)->c_anymethod)(x, &s_bang, 0, 0);
+}
+
+static void pd_defaultpointer(t_pd *x, t_gpointer *gp)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+    {
+        t_atom at;
+        SETPOINTER(&at, gp);
+        (*(*x)->c_listmethod)(x, 0, 1, &at);
+    }
+    else
+    {
+        t_atom at;
+        SETPOINTER(&at, gp);
+        (*(*x)->c_anymethod)(x, &s_pointer, 1, &at);
+    }
+}
+
+static void pd_defaultfloat(t_pd *x, t_float f)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+    {
+        t_atom at;
+        SETFLOAT(&at, f);
+        (*(*x)->c_listmethod)(x, 0, 1, &at);
+    }
+    else
+    {
+        t_atom at;
+        SETFLOAT(&at, f);
+        (*(*x)->c_anymethod)(x, &s_float, 1, &at);
+    }
+}
+
+static void pd_defaultsymbol(t_pd *x, t_symbol *s)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+    {
+        t_atom at;
+        SETSYMBOL(&at, s);
+        (*(*x)->c_listmethod)(x, 0, 1, &at);
+    }
+    else
+    {
+        t_atom at;
+        SETSYMBOL(&at, s);
+        (*(*x)->c_anymethod)(x, &s_symbol, 1, &at);
+    }
+}
+
+void obj_list(t_object *x, t_symbol *s, int argc, t_atom *argv);
+static void class_nosavefn(t_gobj *z, t_binbuf *b);
+
+    /* handle "list" messages to Pds without explicit list methods defined. */
+static void pd_defaultlist(t_pd *x, t_symbol *s, int argc, t_atom *argv)
+{
+            /* a list with one element which is a number can be handled by a
+            "float" method if any is defined; same for "symbol", "pointer". */
+    if (argc == 1)
+    {
+        if (argv->a_type == A_FLOAT &&
+        *(*x)->c_floatmethod != pd_defaultfloat)
+        {
+            (*(*x)->c_floatmethod)(x, argv->a_w.w_float);
+            return;
+        }
+        else if (argv->a_type == A_SYMBOL &&
+            *(*x)->c_symbolmethod != pd_defaultsymbol)
+        {
+            (*(*x)->c_symbolmethod)(x, argv->a_w.w_symbol);
+            return;
+        }
+        else if (argv->a_type == A_POINTER &&
+            *(*x)->c_pointermethod != pd_defaultpointer)
+        {
+            (*(*x)->c_pointermethod)(x, argv->a_w.w_gpointer);
+            return;
+        }
+    }
+        /* Next try for an "anything" method */
+    if ((*x)->c_anymethod != pd_defaultanything)
+        (*(*x)->c_anymethod)(x, &s_list, argc, argv);
+
+        /* if the object is patchable (i.e., can have proper inlets)
+            send it on to obj_list which will unpack the list into the inlets */
+    else if ((*x)->c_patchable)
+        obj_list((t_object *)x, s, argc, argv);
+            /* otherwise gove up and complain. */
+    else pd_defaultanything(x, &s_list, argc, argv);
+}
+
+    /* for now we assume that all "gobjs" are text unless explicitly
+    overridden later by calling class_setbehavior().  I'm not sure
+    how to deal with Pds that aren't gobjs; shouldn't there be a
+    way to check that at run time?  Perhaps the presence of a "newmethod"
+    should be our cue, or perhaps the "tiny" flag.  */
+
+    /* another matter.  This routine does two unrelated things: it creates
+    a Pd class, but also adds a "new" method to create an instance of it.
+    These are combined for historical reasons and for brevity in writing
+    objects.  To avoid adding a "new" method send a null function pointer.
+    To add additional ones, use class_addcreator below.  Some "classes", like
+    "select", are actually two classes of the same name, one for the single-
+    argument form, one for the multiple one; see select_setup() to find out
+    how this is handled.  */
+
+extern t_widgetbehavior text_widgetbehavior;
+extern void text_save(t_gobj *z, t_binbuf *b);
+
+t_class *class_new(t_symbol *s, t_newmethod newmethod, t_method freemethod,
+    size_t size, int flags, t_atomtype type1, ...)
+{
+    va_list ap;
+    t_atomtype vec[MAXPDARG+1], *vp = vec;
+    int count = 0;
+    t_class *c;
+    int typeflag = flags & CLASS_TYPEMASK;
+    if (!typeflag) typeflag = CLASS_PATCHABLE;
+    *vp = type1;
+
+    va_start(ap, type1);
+    while (*vp)
+    {
+        if (count == MAXPDARG)
+        {
+            error("class %s: sorry: only %d creation args allowed",
+                s->s_name, MAXPDARG);
+            break;
+        }
+        vp++;
+        count++;
+        *vp = va_arg(ap, t_atomtype);
+    }
+    va_end(ap);
+    if (pd_objectmaker && newmethod)
+    {
+            /* add a "new" method by the name specified by the object */
+        class_addmethod(pd_objectmaker, (t_method)newmethod, s,
+            vec[0], vec[1], vec[2], vec[3], vec[4], vec[5]);
+        if (class_loadsym)
+        {
+                /* if we're loading an extern it might have been invoked by a
+                longer file name; in this case, make this an admissible name
+                too. */
+            char *loadstring = class_loadsym->s_name,
+                l1 = strlen(s->s_name), l2 = strlen(loadstring);
+            if (l2 > l1 && !strcmp(s->s_name, loadstring + (l2 - l1)))
+                class_addmethod(pd_objectmaker, (t_method)newmethod,
+                    class_loadsym,
+                    vec[0], vec[1], vec[2], vec[3], vec[4], vec[5]);
+        }
+    }
+    c = (t_class *)t_getbytes(sizeof(*c));
+    c->c_name = c->c_helpname = s;
+    c->c_size = size;
+    c->c_methods = t_getbytes(0);
+    c->c_nmethod = 0;
+    c->c_freemethod = (t_method)freemethod;
+    c->c_bangmethod = pd_defaultbang;
+    c->c_pointermethod = pd_defaultpointer;
+    c->c_floatmethod = pd_defaultfloat;
+    c->c_symbolmethod = pd_defaultsymbol;
+    c->c_listmethod = pd_defaultlist;
+    c->c_anymethod = pd_defaultanything;
+    c->c_wb = (typeflag == CLASS_PATCHABLE ? &text_widgetbehavior : 0);
+    c->c_pwb = 0;
+    c->c_firstin = ((flags & CLASS_NOINLET) == 0);
+    c->c_patchable = (typeflag == CLASS_PATCHABLE);
+    c->c_gobj = (typeflag >= CLASS_GOBJ);
+    c->c_drawcommand = 0;
+    c->c_floatsignalin = 0;
+    c->c_externdir = class_extern_dir;
+    c->c_savefn = (typeflag == CLASS_PATCHABLE ? text_save : class_nosavefn);
+#if 0 
+    post("class: %s", c->c_name->s_name);
+#endif
+    return (c);
+}
+
+    /* add a creation method, which is a function that returns a Pd object
+    suitable for putting in an object box.  We presume you've got a class it
+    can belong to, but this won't be used until the newmethod is actually
+    called back (and the new method explicitly takes care of this.) */
+
+void class_addcreator(t_newmethod newmethod, t_symbol *s, 
+    t_atomtype type1, ...)
+{
+    va_list ap;
+    t_atomtype vec[MAXPDARG+1], *vp = vec;
+    int count = 0;
+    *vp = type1;
+
+    va_start(ap, type1);
+    while (*vp)
+    {
+        if (count == MAXPDARG)
+        {
+            error("class %s: sorry: only %d creation args allowed",
+                s->s_name, MAXPDARG);
+            break;
+        }
+        vp++;
+        count++;
+        *vp = va_arg(ap, t_atomtype);
+    } 
+    va_end(ap);
+    class_addmethod(pd_objectmaker, (t_method)newmethod, s,
+        vec[0], vec[1], vec[2], vec[3], vec[4], vec[5]);
+}
+
+void class_addmethod(t_class *c, t_method fn, t_symbol *sel,
+    t_atomtype arg1, ...)
+{
+    va_list ap;
+    t_methodentry *m;
+    t_atomtype argtype = arg1;
+    int nargs;
+    
+    va_start(ap, arg1);
+        /* "signal" method specifies that we take audio signals but
+        that we don't want automatic float to signal conversion.  This
+        is obsolete; you should now use the CLASS_MAINSIGNALIN macro. */
+    if (sel == &s_signal)
+    {
+        if (c->c_floatsignalin)
+            post("warning: signal method overrides class_mainsignalin");
+        c->c_floatsignalin = -1;
+    }
+        /* check for special cases.  "Pointer" is missing here so that
+        pd_objectmaker's pointer method can be typechecked differently.  */
+    if (sel == &s_bang)
+    {
+        if (argtype) goto phooey;
+        class_addbang(c, fn);
+    }
+    else if (sel == &s_float)
+    {
+        if (argtype != A_FLOAT || va_arg(ap, t_atomtype)) goto phooey;
+        class_doaddfloat(c, fn);
+    }
+    else if (sel == &s_symbol)
+    {
+        if (argtype != A_SYMBOL || va_arg(ap, t_atomtype)) goto phooey;
+        class_addsymbol(c, fn);
+    }
+    else if (sel == &s_list)
+    {
+        if (argtype != A_GIMME) goto phooey;
+        class_addlist(c, fn);
+    }
+    else if (sel == &s_anything)
+    {
+        if (argtype != A_GIMME) goto phooey;
+        class_addanything(c, fn);
+    }
+    else
+    {
+        c->c_methods = t_resizebytes(c->c_methods,
+            c->c_nmethod * sizeof(*c->c_methods),
+            (c->c_nmethod + 1) * sizeof(*c->c_methods));
+        m = c->c_methods +  c->c_nmethod;
+        c->c_nmethod++;
+        m->me_name = sel;
+        m->me_fun = (t_gotfn)fn;
+        nargs = 0;
+        while (argtype != A_NULL && nargs < MAXPDARG)
+        {
+            m->me_arg[nargs++] = argtype;
+            argtype = va_arg(ap, t_atomtype);
+        }
+        if (argtype != A_NULL)
+            error("%s_%s: only 5 arguments are typecheckable; use A_GIMME",
+                c->c_name->s_name, sel->s_name);
+        va_end(ap);
+        m->me_arg[nargs] = A_NULL;
+    }
+    return;
+phooey:
+    bug("class_addmethod: %s_%s: bad argument types\n",
+        c->c_name->s_name, sel->s_name);
+}
+
+    /* Instead of these, see the "class_addfloat", etc.,  macros in m_pd.h */
+void class_addbang(t_class *c, t_method fn)
+{
+    c->c_bangmethod = (t_bangmethod)fn;
+}
+
+void class_addpointer(t_class *c, t_method fn)
+{
+    c->c_pointermethod = (t_pointermethod)fn;
+}
+
+void class_doaddfloat(t_class *c, t_method fn)
+{
+    c->c_floatmethod = (t_floatmethod)fn;
+}
+
+void class_addsymbol(t_class *c, t_method fn)
+{
+    c->c_symbolmethod = (t_symbolmethod)fn;
+}
+
+void class_addlist(t_class *c, t_method fn)
+{
+    c->c_listmethod = (t_listmethod)fn;
+}
+
+void class_addanything(t_class *c, t_method fn)
+{
+    c->c_anymethod = (t_anymethod)fn;
+}
+
+void class_setwidget(t_class *c, t_widgetbehavior *w)
+{
+    c->c_wb = w;
+}
+
+void class_setparentwidget(t_class *c, t_parentwidgetbehavior *pw)
+{
+    c->c_pwb = pw;
+}
+
+char *class_getname(t_class *c)
+{
+    return (c->c_name->s_name);
+}
+
+char *class_gethelpname(t_class *c)
+{
+    return (c->c_helpname->s_name);
+}
+
+void class_sethelpsymbol(t_class *c, t_symbol *s)
+{
+    c->c_helpname = s;
+}
+
+t_parentwidgetbehavior *pd_getparentwidget(t_pd *x)
+{
+    return ((*x)->c_pwb);
+}
+
+void class_setdrawcommand(t_class *c)
+{
+    c->c_drawcommand = 1;
+}
+
+int class_isdrawcommand(t_class *c)
+{
+    return (c->c_drawcommand);
+}
+
+static void pd_floatforsignal(t_pd *x, t_float f)
+{
+    int offset = (*x)->c_floatsignalin;
+    if (offset > 0)
+        *(t_sample *)(((char *)x) + offset) = ftofix(f);
+    else
+        pd_error(x, "%s: float unexpected for signal input",
+            (*x)->c_name->s_name);
+}
+
+void class_domainsignalin(t_class *c, int onset)
+{
+    if (onset <= 0) onset = -1;
+    else
+    {
+        if (c->c_floatmethod != pd_defaultfloat)
+            post("warning: %s: float method overwritten", c->c_name->s_name);
+        c->c_floatmethod = (t_floatmethod)pd_floatforsignal;
+    }
+    c->c_floatsignalin = onset;
+}
+
+void class_set_extern_dir(t_symbol *s)
+{
+    class_extern_dir = s;
+}
+
+char *class_gethelpdir(t_class *c)
+{
+    return (c->c_externdir->s_name);
+}
+
+static void class_nosavefn(t_gobj *z, t_binbuf *b)
+{
+    bug("save function called but not defined");
+}
+
+void class_setsavefn(t_class *c, t_savefn f)
+{
+    c->c_savefn = f;
+}
+
+t_savefn class_getsavefn(t_class *c)
+{
+    return (c->c_savefn);
+}
+
+void class_setpropertiesfn(t_class *c, t_propertiesfn f)
+{
+    c->c_propertiesfn = f;
+}
+
+t_propertiesfn class_getpropertiesfn(t_class *c)
+{
+    return (c->c_propertiesfn);
+}
+
+/* ---------------- the symbol table ------------------------ */
+
+#define HASHSIZE 1024
+
+static t_symbol *symhash[HASHSIZE];
+
+t_symbol *dogensym(char *s, t_symbol *oldsym)
+{
+    t_symbol **sym1, *sym2;
+    unsigned int hash1 = 0,  hash2 = 0;
+    int length = 0;
+    char *s2 = s;
+    while (*s2)
+    {
+        hash1 += *s2;
+        hash2 += hash1;
+        length++;
+        s2++;
+    }
+    sym1 = symhash + (hash2 & (HASHSIZE-1));
+    while (sym2 = *sym1)
+    {
+        if (!strcmp(sym2->s_name, s)) return(sym2);
+        sym1 = &sym2->s_next;
+    }
+    if (oldsym) sym2 = oldsym;
+    else
+    {
+        sym2 = (t_symbol *)t_getbytes(sizeof(*sym2));
+        sym2->s_name = t_getbytes(length+1);
+        sym2->s_next = 0;
+        sym2->s_thing = 0;
+        strcpy(sym2->s_name, s);
+    }
+    *sym1 = sym2;
+    return (sym2);
+}
+
+t_symbol *gensym(char *s)
+{
+    return(dogensym(s, 0));
+}
+
+static t_symbol *addfileextent(t_symbol *s)
+{
+    char namebuf[MAXPDSTRING], *str = s->s_name;
+    int ln = strlen(str);
+    if (!strcmp(str + ln - 3, ".pd")) return (s);
+    strcpy(namebuf, str);
+    strcpy(namebuf+ln, ".pd");
+    return (gensym(namebuf));
+}
+
+static int tryingalready;
+
+void canvas_popabstraction(t_canvas *x);
+extern t_pd *newest;
+
+t_symbol* pathsearch(t_symbol *s,char* ext);
+int pd_setloadingabstraction(t_symbol *sym);
+
+    /* this routine is called when a new "object" is requested whose class Pd
+    doesn't know.  Pd tries to load it as an extern, then as an abstraction. */
+void new_anything(void *dummy, t_symbol *s, int argc, t_atom *argv)
+{
+    t_pd *current;
+    t_symbol *dir = canvas_getcurrentdir();
+    int fd;
+    char dirbuf[MAXPDSTRING], *nameptr;
+    if (tryingalready) return;
+    newest = 0;
+    class_loadsym = s;
+    if (sys_load_lib(dir->s_name, s->s_name))
+    {
+        tryingalready = 1;
+        typedmess(dummy, s, argc, argv);
+        tryingalready = 0;
+        return;
+    }
+    class_loadsym = 0;
+    current = s__X.s_thing;
+    if ((fd = open_via_path(dir->s_name, s->s_name, ".pd",
+        dirbuf, &nameptr, MAXPDSTRING, 0)) >= 0 ||
+            (fd = open_via_path(dir->s_name, s->s_name, ".pat",
+                dirbuf, &nameptr, MAXPDSTRING, 0)) >= 0)
+    {
+        close (fd);
+        if (!pd_setloadingabstraction(s))
+        {
+            canvas_setargs(argc, argv); /* bug fix by Krzysztof Czaja */
+            binbuf_evalfile(gensym(nameptr), gensym(dirbuf));
+            if (s__X.s_thing != current)
+                canvas_popabstraction((t_canvas *)(s__X.s_thing));
+            canvas_setargs(0, 0);
+        }
+        else error("%s: can't load abstraction within itself\n", s->s_name);
+    }
+    else newest = 0;
+}
+
+t_symbol  s_pointer =   {"pointer", 0, 0};
+t_symbol  s_float =     {"float", 0, 0};
+t_symbol  s_symbol =    {"symbol", 0, 0};
+t_symbol  s_bang =      {"bang", 0, 0};
+t_symbol  s_list =      {"list", 0, 0};
+t_symbol  s_anything =  {"anything", 0, 0};
+t_symbol  s_signal =    {"signal", 0, 0};
+t_symbol  s__N =        {"#N", 0, 0};
+t_symbol  s__X =        {"#X", 0, 0};
+t_symbol  s_x =         {"x", 0, 0};
+t_symbol  s_y =         {"y", 0, 0};
+t_symbol  s_ =          {"", 0, 0};
+
+static t_symbol *symlist[] = { &s_pointer, &s_float, &s_symbol, &s_bang,
+    &s_list, &s_anything, &s_signal, &s__N, &s__X, &s_x, &s_y, &s_};
+
+void mess_init(void)
+{
+    t_symbol **sp;
+    int i;
+
+    if (pd_objectmaker) return;    
+    for (i = sizeof(symlist)/sizeof(*symlist), sp = symlist; i--; sp++)
+        (void) dogensym((*sp)->s_name, *sp);
+    pd_objectmaker = class_new(gensym("objectmaker"), 0, 0, sizeof(t_pd),
+        CLASS_DEFAULT, A_NULL);
+    pd_canvasmaker = class_new(gensym("classmaker"), 0, 0, sizeof(t_pd),
+        CLASS_DEFAULT, A_NULL);
+    pd_bind(&pd_canvasmaker, &s__N);
+    class_addanything(pd_objectmaker, (t_method)new_anything);
+}
+
+t_pd *newest;
+
+/* This is externally available, but note that it might later disappear; the
+whole "newest" thing is a hack which needs to be redesigned. */
+t_pd *pd_newest(void)
+{
+    return (newest);
+}
+
+    /* horribly, we need prototypes for each of the artificial function
+    calls in typedmess(), to keep the compiler quiet. */
+typedef t_pd *(*t_newgimme)(t_symbol *s, int argc, t_atom *argv);
+typedef void(*t_messgimme)(t_pd *x, t_symbol *s, int argc, t_atom *argv);
+
+typedef t_pd *(*t_fun0)(
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun1)(t_int i1,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun2)(t_int i1, t_int i2,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun3)(t_int i1, t_int i2, t_int i3,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun4)(t_int i1, t_int i2, t_int i3, t_int i4,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun5)(t_int i1, t_int i2, t_int i3, t_int i4, t_int i5,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun6)(t_int i1, t_int i2, t_int i3, t_int i4, t_int i5, t_int i6,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+
+void pd_typedmess(t_pd *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_method *f;
+    t_class *c = *x;
+    t_methodentry *m;
+    t_atomtype *wp, wanttype;
+    int i;
+    t_int ai[MAXPDARG+1], *ap = ai;
+    t_floatarg ad[MAXPDARG+1], *dp = ad;
+    int narg = 0;
+    t_pd *bonzo;
+    
+        /* check for messages that are handled by fixed slots in the class
+        structure.  We don't catch "pointer" though so that sending "pointer"
+        to pd_objectmaker doesn't require that we supply a pointer value. */
+    if (s == &s_float)
+    {
+        if (!argc) (*c->c_floatmethod)(x, 0.);
+        else if (argv->a_type == A_FLOAT)
+            (*c->c_floatmethod)(x, argv->a_w.w_float);
+        else goto badarg;
+        return;
+    }
+    if (s == &s_bang)
+    {
+        (*c->c_bangmethod)(x);
+        return;
+    }
+    if (s == &s_list)
+    {
+        (*c->c_listmethod)(x, s, argc, argv);
+        return;
+    }
+    if (s == &s_symbol)
+    {
+        if (argc && argv->a_type == A_SYMBOL)
+            (*c->c_symbolmethod)(x, argv->a_w.w_symbol);
+        else
+            (*c->c_symbolmethod)(x, &s_);
+        return;
+    }
+    for (i = c->c_nmethod, m = c->c_methods; i--; m++)
+        if (m->me_name == s)
+    {
+        wp = m->me_arg;
+        if (*wp == A_GIMME)
+        {
+            if (x == &pd_objectmaker)
+                newest = (*((t_newgimme)(m->me_fun)))(s, argc, argv);
+            else (*((t_messgimme)(m->me_fun)))(x, s, argc, argv);
+            return;
+        }
+        if (argc > MAXPDARG) argc = MAXPDARG;
+        if (x != &pd_objectmaker) *(ap++) = (t_int)x, narg++;
+        while (wanttype = *wp++)
+        {
+            switch (wanttype)
+            {
+            case A_POINTER:
+                if (!argc) goto badarg;
+                else
+                {
+                    if (argv->a_type == A_POINTER)
+                        *ap = (t_int)(argv->a_w.w_gpointer);
+                    else goto badarg;
+                    argc--;
+                    argv++;
+                }
+                narg++;
+                ap++;
+                break;
+            case A_FLOAT:
+                if (!argc) goto badarg;
+            case A_DEFFLOAT:
+                if (!argc) *dp = 0;
+                else
+                {
+                    if (argv->a_type == A_FLOAT)
+                        *dp = argv->a_w.w_float;
+                    else goto badarg;
+                    argc--;
+                    argv++;
+                }
+                dp++;
+                break;
+            case A_SYMBOL:
+                if (!argc) goto badarg;
+            case A_DEFSYM:
+                if (!argc) *ap = (t_int)(&s_);
+                else
+                {
+                    if (argv->a_type == A_SYMBOL)
+                        *ap = (t_int)(argv->a_w.w_symbol);
+                            /* if it's an unfilled "dollar" argument it appears
+                            as zero here; cheat and bash it to the null
+                            symbol.  Unfortunately, this lets real zeros
+                            pass as symbols too, which seems wrong... */
+                    else if (x == &pd_objectmaker && argv->a_type == A_FLOAT
+                        && argv->a_w.w_float == 0)
+                        *ap = (t_int)(&s_);
+                    else goto badarg;
+                    argc--;
+                    argv++;
+                }
+                narg++;
+                ap++;
+            }
+        }
+        switch (narg)
+        {
+        case 0 : bonzo = (*(t_fun0)(m->me_fun))
+            (ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 1 : bonzo = (*(t_fun1)(m->me_fun))
+            (ai[0], ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 2 : bonzo = (*(t_fun2)(m->me_fun))
+            (ai[0], ai[1], ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 3 : bonzo = (*(t_fun3)(m->me_fun))
+            (ai[0], ai[1], ai[2], ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 4 : bonzo = (*(t_fun4)(m->me_fun))
+            (ai[0], ai[1], ai[2], ai[3],
+                ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 5 : bonzo = (*(t_fun5)(m->me_fun))
+            (ai[0], ai[1], ai[2], ai[3], ai[4],
+                ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 6 : bonzo = (*(t_fun6)(m->me_fun))
+            (ai[0], ai[1], ai[2], ai[3], ai[4], ai[5],
+                ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        default: bonzo = 0;
+        }
+        if (x == &pd_objectmaker)
+            newest = bonzo;
+        return;
+    }
+    (*c->c_anymethod)(x, s, argc, argv);
+    return;
+badarg:
+    pd_error(x, "Bad arguments for message '%s' to object '%s'",
+        s->s_name, c->c_name->s_name);
+}
+
+void pd_vmess(t_pd *x, t_symbol *sel, char *fmt, ...)
+{
+    va_list ap;
+    t_atom arg[MAXPDARG], *at =arg;
+    int nargs = 0;
+    char *fp = fmt;
+
+    va_start(ap, fmt);
+    while (1)
+    {
+        if (nargs > MAXPDARG)
+        {
+            pd_error(x, "pd_vmess: only %d allowed", MAXPDARG);
+            break;
+        }
+        switch(*fp++)
+        {
+        case 'f': SETFLOAT(at, va_arg(ap, double)); break;
+        case 's': SETSYMBOL(at, va_arg(ap, t_symbol *)); break;
+        case 'i': SETFLOAT(at, va_arg(ap, t_int)); break;       
+        case 'p': SETPOINTER(at, va_arg(ap, t_gpointer *)); break;
+        default: goto done;
+        }
+        at++;
+        nargs++;
+    }
+done:
+    va_end(ap);
+    typedmess(x, sel, nargs, arg);
+}
+
+void pd_forwardmess(t_pd *x, int argc, t_atom *argv)
+{
+    if (argc)
+    {
+        t_atomtype t = argv->a_type;
+        if (t == A_SYMBOL) pd_typedmess(x, argv->a_w.w_symbol, argc-1, argv+1);
+        else if (t == A_POINTER)
+        {
+            if (argc == 1) pd_pointer(x, argv->a_w.w_gpointer);
+            else pd_list(x, &s_list, argc, argv);
+        }
+        else if (t == A_FLOAT)
+        {
+            if (argc == 1) pd_float(x, argv->a_w.w_float);
+            else pd_list(x, &s_list, argc, argv);
+        }
+        else bug("pd_forwardmess");
+    }
+
+}
+
+void nullfn(void) {}
+
+t_gotfn getfn(t_pd *x, t_symbol *s)
+{
+    t_class *c = *x;
+    t_methodentry *m;
+    int i;
+
+    for (i = c->c_nmethod, m = c->c_methods; i--; m++)
+        if (m->me_name == s) return(m->me_fun);
+    pd_error(x, "%s: no method for message '%s'", c->c_name->s_name, s->s_name);
+    return((t_gotfn)nullfn);
+}
+
+t_gotfn zgetfn(t_pd *x, t_symbol *s)
+{
+    t_class *c = *x;
+    t_methodentry *m;
+    int i;
+
+    for (i = c->c_nmethod, m = c->c_methods; i--; m++)
+        if (m->me_name == s) return(m->me_fun);
+    return(0);
+}
+/* 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.  */
+
+#define PD_CLASS_DEF
+#include "m_pd.h"
+#include "m_imp.h"
+#include "s_stuff.h"
+#include <stdlib.h>
+#ifdef UNIX
+#include <unistd.h>
+#endif
+#ifdef MSW
+#include <io.h>
+#endif
+
+#include <stdarg.h>
+#include <string.h>
+
+static t_symbol *class_loadsym;     /* name under which an extern is invoked */
+static void pd_defaultfloat(t_pd *x, t_float f);
+static void pd_defaultlist(t_pd *x, t_symbol *s, int argc, t_atom *argv);
+t_pd pd_objectmaker;    /* factory for creating "object" boxes */
+t_pd pd_canvasmaker;    /* factory for creating canvases */
+
+static t_symbol *class_extern_dir = &s_;
+
+static void pd_defaultanything(t_pd *x, t_symbol *s, int argc, t_atom *argv)
+{
+    pd_error(x, "%s: no method for '%s'", (*x)->c_name->s_name, s->s_name);
+}
+
+static void pd_defaultbang(t_pd *x)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+        (*(*x)->c_listmethod)(x, 0, 0, 0);
+    else (*(*x)->c_anymethod)(x, &s_bang, 0, 0);
+}
+
+static void pd_defaultpointer(t_pd *x, t_gpointer *gp)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+    {
+        t_atom at;
+        SETPOINTER(&at, gp);
+        (*(*x)->c_listmethod)(x, 0, 1, &at);
+    }
+    else
+    {
+        t_atom at;
+        SETPOINTER(&at, gp);
+        (*(*x)->c_anymethod)(x, &s_pointer, 1, &at);
+    }
+}
+
+static void pd_defaultfloat(t_pd *x, t_float f)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+    {
+        t_atom at;
+        SETFLOAT(&at, f);
+        (*(*x)->c_listmethod)(x, 0, 1, &at);
+    }
+    else
+    {
+        t_atom at;
+        SETFLOAT(&at, f);
+        (*(*x)->c_anymethod)(x, &s_float, 1, &at);
+    }
+}
+
+static void pd_defaultsymbol(t_pd *x, t_symbol *s)
+{
+    if (*(*x)->c_listmethod != pd_defaultlist)
+    {
+        t_atom at;
+        SETSYMBOL(&at, s);
+        (*(*x)->c_listmethod)(x, 0, 1, &at);
+    }
+    else
+    {
+        t_atom at;
+        SETSYMBOL(&at, s);
+        (*(*x)->c_anymethod)(x, &s_symbol, 1, &at);
+    }
+}
+
+void obj_list(t_object *x, t_symbol *s, int argc, t_atom *argv);
+static void class_nosavefn(t_gobj *z, t_binbuf *b);
+
+    /* handle "list" messages to Pds without explicit list methods defined. */
+static void pd_defaultlist(t_pd *x, t_symbol *s, int argc, t_atom *argv)
+{
+            /* a list with one element which is a number can be handled by a
+            "float" method if any is defined; same for "symbol", "pointer". */
+    if (argc == 1)
+    {
+        if (argv->a_type == A_FLOAT &&
+        *(*x)->c_floatmethod != pd_defaultfloat)
+        {
+            (*(*x)->c_floatmethod)(x, argv->a_w.w_float);
+            return;
+        }
+        else if (argv->a_type == A_SYMBOL &&
+            *(*x)->c_symbolmethod != pd_defaultsymbol)
+        {
+            (*(*x)->c_symbolmethod)(x, argv->a_w.w_symbol);
+            return;
+        }
+        else if (argv->a_type == A_POINTER &&
+            *(*x)->c_pointermethod != pd_defaultpointer)
+        {
+            (*(*x)->c_pointermethod)(x, argv->a_w.w_gpointer);
+            return;
+        }
+    }
+        /* Next try for an "anything" method */
+    if ((*x)->c_anymethod != pd_defaultanything)
+        (*(*x)->c_anymethod)(x, &s_list, argc, argv);
+
+        /* if the object is patchable (i.e., can have proper inlets)
+            send it on to obj_list which will unpack the list into the inlets */
+    else if ((*x)->c_patchable)
+        obj_list((t_object *)x, s, argc, argv);
+            /* otherwise gove up and complain. */
+    else pd_defaultanything(x, &s_list, argc, argv);
+}
+
+    /* for now we assume that all "gobjs" are text unless explicitly
+    overridden later by calling class_setbehavior().  I'm not sure
+    how to deal with Pds that aren't gobjs; shouldn't there be a
+    way to check that at run time?  Perhaps the presence of a "newmethod"
+    should be our cue, or perhaps the "tiny" flag.  */
+
+    /* another matter.  This routine does two unrelated things: it creates
+    a Pd class, but also adds a "new" method to create an instance of it.
+    These are combined for historical reasons and for brevity in writing
+    objects.  To avoid adding a "new" method send a null function pointer.
+    To add additional ones, use class_addcreator below.  Some "classes", like
+    "select", are actually two classes of the same name, one for the single-
+    argument form, one for the multiple one; see select_setup() to find out
+    how this is handled.  */
+
+extern t_widgetbehavior text_widgetbehavior;
+extern void text_save(t_gobj *z, t_binbuf *b);
+
+t_class *class_new(t_symbol *s, t_newmethod newmethod, t_method freemethod,
+    size_t size, int flags, t_atomtype type1, ...)
+{
+    va_list ap;
+    t_atomtype vec[MAXPDARG+1], *vp = vec;
+    int count = 0;
+    t_class *c;
+    int typeflag = flags & CLASS_TYPEMASK;
+    if (!typeflag) typeflag = CLASS_PATCHABLE;
+    *vp = type1;
+
+    va_start(ap, type1);
+    while (*vp)
+    {
+        if (count == MAXPDARG)
+        {
+            error("class %s: sorry: only %d creation args allowed",
+                s->s_name, MAXPDARG);
+            break;
+        }
+        vp++;
+        count++;
+        *vp = va_arg(ap, t_atomtype);
+    }
+    va_end(ap);
+    if (pd_objectmaker && newmethod)
+    {
+            /* add a "new" method by the name specified by the object */
+        class_addmethod(pd_objectmaker, (t_method)newmethod, s,
+            vec[0], vec[1], vec[2], vec[3], vec[4], vec[5]);
+        if (class_loadsym)
+        {
+                /* if we're loading an extern it might have been invoked by a
+                longer file name; in this case, make this an admissible name
+                too. */
+            char *loadstring = class_loadsym->s_name,
+                l1 = strlen(s->s_name), l2 = strlen(loadstring);
+            if (l2 > l1 && !strcmp(s->s_name, loadstring + (l2 - l1)))
+                class_addmethod(pd_objectmaker, (t_method)newmethod,
+                    class_loadsym,
+                    vec[0], vec[1], vec[2], vec[3], vec[4], vec[5]);
+        }
+    }
+    c = (t_class *)t_getbytes(sizeof(*c));
+    c->c_name = c->c_helpname = s;
+    c->c_size = size;
+    c->c_methods = t_getbytes(0);
+    c->c_nmethod = 0;
+    c->c_freemethod = (t_method)freemethod;
+    c->c_bangmethod = pd_defaultbang;
+    c->c_pointermethod = pd_defaultpointer;
+    c->c_floatmethod = pd_defaultfloat;
+    c->c_symbolmethod = pd_defaultsymbol;
+    c->c_listmethod = pd_defaultlist;
+    c->c_anymethod = pd_defaultanything;
+    c->c_wb = (typeflag == CLASS_PATCHABLE ? &text_widgetbehavior : 0);
+    c->c_pwb = 0;
+    c->c_firstin = ((flags & CLASS_NOINLET) == 0);
+    c->c_patchable = (typeflag == CLASS_PATCHABLE);
+    c->c_gobj = (typeflag >= CLASS_GOBJ);
+    c->c_drawcommand = 0;
+    c->c_floatsignalin = 0;
+    c->c_externdir = class_extern_dir;
+    c->c_savefn = (typeflag == CLASS_PATCHABLE ? text_save : class_nosavefn);
+#if 0 
+    post("class: %s", c->c_name->s_name);
+#endif
+    return (c);
+}
+
+    /* add a creation method, which is a function that returns a Pd object
+    suitable for putting in an object box.  We presume you've got a class it
+    can belong to, but this won't be used until the newmethod is actually
+    called back (and the new method explicitly takes care of this.) */
+
+void class_addcreator(t_newmethod newmethod, t_symbol *s, 
+    t_atomtype type1, ...)
+{
+    va_list ap;
+    t_atomtype vec[MAXPDARG+1], *vp = vec;
+    int count = 0;
+    *vp = type1;
+
+    va_start(ap, type1);
+    while (*vp)
+    {
+        if (count == MAXPDARG)
+        {
+            error("class %s: sorry: only %d creation args allowed",
+                s->s_name, MAXPDARG);
+            break;
+        }
+        vp++;
+        count++;
+        *vp = va_arg(ap, t_atomtype);
+    } 
+    va_end(ap);
+    class_addmethod(pd_objectmaker, (t_method)newmethod, s,
+        vec[0], vec[1], vec[2], vec[3], vec[4], vec[5]);
+}
+
+void class_addmethod(t_class *c, t_method fn, t_symbol *sel,
+    t_atomtype arg1, ...)
+{
+    va_list ap;
+    t_methodentry *m;
+    t_atomtype argtype = arg1;
+    int nargs;
+    
+    va_start(ap, arg1);
+        /* "signal" method specifies that we take audio signals but
+        that we don't want automatic float to signal conversion.  This
+        is obsolete; you should now use the CLASS_MAINSIGNALIN macro. */
+    if (sel == &s_signal)
+    {
+        if (c->c_floatsignalin)
+            post("warning: signal method overrides class_mainsignalin");
+        c->c_floatsignalin = -1;
+    }
+        /* check for special cases.  "Pointer" is missing here so that
+        pd_objectmaker's pointer method can be typechecked differently.  */
+    if (sel == &s_bang)
+    {
+        if (argtype) goto phooey;
+        class_addbang(c, fn);
+    }
+    else if (sel == &s_float)
+    {
+        if (argtype != A_FLOAT || va_arg(ap, t_atomtype)) goto phooey;
+        class_doaddfloat(c, fn);
+    }
+    else if (sel == &s_symbol)
+    {
+        if (argtype != A_SYMBOL || va_arg(ap, t_atomtype)) goto phooey;
+        class_addsymbol(c, fn);
+    }
+    else if (sel == &s_list)
+    {
+        if (argtype != A_GIMME) goto phooey;
+        class_addlist(c, fn);
+    }
+    else if (sel == &s_anything)
+    {
+        if (argtype != A_GIMME) goto phooey;
+        class_addanything(c, fn);
+    }
+    else
+    {
+        c->c_methods = t_resizebytes(c->c_methods,
+            c->c_nmethod * sizeof(*c->c_methods),
+            (c->c_nmethod + 1) * sizeof(*c->c_methods));
+        m = c->c_methods +  c->c_nmethod;
+        c->c_nmethod++;
+        m->me_name = sel;
+        m->me_fun = (t_gotfn)fn;
+        nargs = 0;
+        while (argtype != A_NULL && nargs < MAXPDARG)
+        {
+            m->me_arg[nargs++] = argtype;
+            argtype = va_arg(ap, t_atomtype);
+        }
+        if (argtype != A_NULL)
+            error("%s_%s: only 5 arguments are typecheckable; use A_GIMME",
+                c->c_name->s_name, sel->s_name);
+        va_end(ap);
+        m->me_arg[nargs] = A_NULL;
+    }
+    return;
+phooey:
+    bug("class_addmethod: %s_%s: bad argument types\n",
+        c->c_name->s_name, sel->s_name);
+}
+
+    /* Instead of these, see the "class_addfloat", etc.,  macros in m_pd.h */
+void class_addbang(t_class *c, t_method fn)
+{
+    c->c_bangmethod = (t_bangmethod)fn;
+}
+
+void class_addpointer(t_class *c, t_method fn)
+{
+    c->c_pointermethod = (t_pointermethod)fn;
+}
+
+void class_doaddfloat(t_class *c, t_method fn)
+{
+    c->c_floatmethod = (t_floatmethod)fn;
+}
+
+void class_addsymbol(t_class *c, t_method fn)
+{
+    c->c_symbolmethod = (t_symbolmethod)fn;
+}
+
+void class_addlist(t_class *c, t_method fn)
+{
+    c->c_listmethod = (t_listmethod)fn;
+}
+
+void class_addanything(t_class *c, t_method fn)
+{
+    c->c_anymethod = (t_anymethod)fn;
+}
+
+void class_setwidget(t_class *c, t_widgetbehavior *w)
+{
+    c->c_wb = w;
+}
+
+void class_setparentwidget(t_class *c, t_parentwidgetbehavior *pw)
+{
+    c->c_pwb = pw;
+}
+
+char *class_getname(t_class *c)
+{
+    return (c->c_name->s_name);
+}
+
+char *class_gethelpname(t_class *c)
+{
+    return (c->c_helpname->s_name);
+}
+
+void class_sethelpsymbol(t_class *c, t_symbol *s)
+{
+    c->c_helpname = s;
+}
+
+t_parentwidgetbehavior *pd_getparentwidget(t_pd *x)
+{
+    return ((*x)->c_pwb);
+}
+
+void class_setdrawcommand(t_class *c)
+{
+    c->c_drawcommand = 1;
+}
+
+int class_isdrawcommand(t_class *c)
+{
+    return (c->c_drawcommand);
+}
+
+static void pd_floatforsignal(t_pd *x, t_float f)
+{
+    int offset = (*x)->c_floatsignalin;
+    if (offset > 0)
+        *(t_sample *)(((char *)x) + offset) = ftofix(f);
+    else
+        pd_error(x, "%s: float unexpected for signal input",
+            (*x)->c_name->s_name);
+}
+
+void class_domainsignalin(t_class *c, int onset)
+{
+    if (onset <= 0) onset = -1;
+    else
+    {
+        if (c->c_floatmethod != pd_defaultfloat)
+            post("warning: %s: float method overwritten", c->c_name->s_name);
+        c->c_floatmethod = (t_floatmethod)pd_floatforsignal;
+    }
+    c->c_floatsignalin = onset;
+}
+
+void class_set_extern_dir(t_symbol *s)
+{
+    class_extern_dir = s;
+}
+
+char *class_gethelpdir(t_class *c)
+{
+    return (c->c_externdir->s_name);
+}
+
+static void class_nosavefn(t_gobj *z, t_binbuf *b)
+{
+    bug("save function called but not defined");
+}
+
+void class_setsavefn(t_class *c, t_savefn f)
+{
+    c->c_savefn = f;
+}
+
+t_savefn class_getsavefn(t_class *c)
+{
+    return (c->c_savefn);
+}
+
+void class_setpropertiesfn(t_class *c, t_propertiesfn f)
+{
+    c->c_propertiesfn = f;
+}
+
+t_propertiesfn class_getpropertiesfn(t_class *c)
+{
+    return (c->c_propertiesfn);
+}
+
+/* ---------------- the symbol table ------------------------ */
+
+#define HASHSIZE 1024
+
+static t_symbol *symhash[HASHSIZE];
+
+t_symbol *dogensym(char *s, t_symbol *oldsym)
+{
+    t_symbol **sym1, *sym2;
+    unsigned int hash1 = 0,  hash2 = 0;
+    int length = 0;
+    char *s2 = s;
+    while (*s2)
+    {
+        hash1 += *s2;
+        hash2 += hash1;
+        length++;
+        s2++;
+    }
+    sym1 = symhash + (hash2 & (HASHSIZE-1));
+    while (sym2 = *sym1)
+    {
+        if (!strcmp(sym2->s_name, s)) return(sym2);
+        sym1 = &sym2->s_next;
+    }
+    if (oldsym) sym2 = oldsym;
+    else
+    {
+        sym2 = (t_symbol *)t_getbytes(sizeof(*sym2));
+        sym2->s_name = t_getbytes(length+1);
+        sym2->s_next = 0;
+        sym2->s_thing = 0;
+        strcpy(sym2->s_name, s);
+    }
+    *sym1 = sym2;
+    return (sym2);
+}
+
+t_symbol *gensym(char *s)
+{
+    return(dogensym(s, 0));
+}
+
+static t_symbol *addfileextent(t_symbol *s)
+{
+    char namebuf[MAXPDSTRING], *str = s->s_name;
+    int ln = strlen(str);
+    if (!strcmp(str + ln - 3, ".pd")) return (s);
+    strcpy(namebuf, str);
+    strcpy(namebuf+ln, ".pd");
+    return (gensym(namebuf));
+}
+
+static int tryingalready;
+
+void canvas_popabstraction(t_canvas *x);
+extern t_pd *newest;
+
+t_symbol* pathsearch(t_symbol *s,char* ext);
+int pd_setloadingabstraction(t_symbol *sym);
+
+    /* this routine is called when a new "object" is requested whose class Pd
+    doesn't know.  Pd tries to load it as an extern, then as an abstraction. */
+void new_anything(void *dummy, t_symbol *s, int argc, t_atom *argv)
+{
+    t_pd *current;
+    t_symbol *dir = canvas_getcurrentdir();
+    int fd;
+    char dirbuf[MAXPDSTRING], *nameptr;
+    if (tryingalready) return;
+    newest = 0;
+    class_loadsym = s;
+    if (sys_load_lib(dir->s_name, s->s_name))
+    {
+        tryingalready = 1;
+        typedmess(dummy, s, argc, argv);
+        tryingalready = 0;
+        return;
+    }
+    class_loadsym = 0;
+    current = s__X.s_thing;
+    if ((fd = open_via_path(dir->s_name, s->s_name, ".pd",
+        dirbuf, &nameptr, MAXPDSTRING, 0)) >= 0 ||
+            (fd = open_via_path(dir->s_name, s->s_name, ".pat",
+                dirbuf, &nameptr, MAXPDSTRING, 0)) >= 0)
+    {
+        close (fd);
+        if (!pd_setloadingabstraction(s))
+        {
+            canvas_setargs(argc, argv); /* bug fix by Krzysztof Czaja */
+            binbuf_evalfile(gensym(nameptr), gensym(dirbuf));
+            if (s__X.s_thing != current)
+                canvas_popabstraction((t_canvas *)(s__X.s_thing));
+            canvas_setargs(0, 0);
+        }
+        else error("%s: can't load abstraction within itself\n", s->s_name);
+    }
+    else newest = 0;
+}
+
+t_symbol  s_pointer =   {"pointer", 0, 0};
+t_symbol  s_float =     {"float", 0, 0};
+t_symbol  s_symbol =    {"symbol", 0, 0};
+t_symbol  s_bang =      {"bang", 0, 0};
+t_symbol  s_list =      {"list", 0, 0};
+t_symbol  s_anything =  {"anything", 0, 0};
+t_symbol  s_signal =    {"signal", 0, 0};
+t_symbol  s__N =        {"#N", 0, 0};
+t_symbol  s__X =        {"#X", 0, 0};
+t_symbol  s_x =         {"x", 0, 0};
+t_symbol  s_y =         {"y", 0, 0};
+t_symbol  s_ =          {"", 0, 0};
+
+static t_symbol *symlist[] = { &s_pointer, &s_float, &s_symbol, &s_bang,
+    &s_list, &s_anything, &s_signal, &s__N, &s__X, &s_x, &s_y, &s_};
+
+void mess_init(void)
+{
+    t_symbol **sp;
+    int i;
+
+    if (pd_objectmaker) return;    
+    for (i = sizeof(symlist)/sizeof(*symlist), sp = symlist; i--; sp++)
+        (void) dogensym((*sp)->s_name, *sp);
+    pd_objectmaker = class_new(gensym("objectmaker"), 0, 0, sizeof(t_pd),
+        CLASS_DEFAULT, A_NULL);
+    pd_canvasmaker = class_new(gensym("classmaker"), 0, 0, sizeof(t_pd),
+        CLASS_DEFAULT, A_NULL);
+    pd_bind(&pd_canvasmaker, &s__N);
+    class_addanything(pd_objectmaker, (t_method)new_anything);
+}
+
+t_pd *newest;
+
+/* This is externally available, but note that it might later disappear; the
+whole "newest" thing is a hack which needs to be redesigned. */
+t_pd *pd_newest(void)
+{
+    return (newest);
+}
+
+    /* horribly, we need prototypes for each of the artificial function
+    calls in typedmess(), to keep the compiler quiet. */
+typedef t_pd *(*t_newgimme)(t_symbol *s, int argc, t_atom *argv);
+typedef void(*t_messgimme)(t_pd *x, t_symbol *s, int argc, t_atom *argv);
+
+typedef t_pd *(*t_fun0)(
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun1)(t_int i1,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun2)(t_int i1, t_int i2,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun3)(t_int i1, t_int i2, t_int i3,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun4)(t_int i1, t_int i2, t_int i3, t_int i4,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun5)(t_int i1, t_int i2, t_int i3, t_int i4, t_int i5,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+typedef t_pd *(*t_fun6)(t_int i1, t_int i2, t_int i3, t_int i4, t_int i5, t_int i6,
+    t_floatarg d1, t_floatarg d2, t_floatarg d3, t_floatarg d4, t_floatarg d5);
+
+void pd_typedmess(t_pd *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_method *f;
+    t_class *c = *x;
+    t_methodentry *m;
+    t_atomtype *wp, wanttype;
+    int i;
+    t_int ai[MAXPDARG+1], *ap = ai;
+    t_floatarg ad[MAXPDARG+1], *dp = ad;
+    int narg = 0;
+    t_pd *bonzo;
+    
+        /* check for messages that are handled by fixed slots in the class
+        structure.  We don't catch "pointer" though so that sending "pointer"
+        to pd_objectmaker doesn't require that we supply a pointer value. */
+    if (s == &s_float)
+    {
+        if (!argc) (*c->c_floatmethod)(x, 0.);
+        else if (argv->a_type == A_FLOAT)
+            (*c->c_floatmethod)(x, argv->a_w.w_float);
+        else goto badarg;
+        return;
+    }
+    if (s == &s_bang)
+    {
+        (*c->c_bangmethod)(x);
+        return;
+    }
+    if (s == &s_list)
+    {
+        (*c->c_listmethod)(x, s, argc, argv);
+        return;
+    }
+    if (s == &s_symbol)
+    {
+        if (argc && argv->a_type == A_SYMBOL)
+            (*c->c_symbolmethod)(x, argv->a_w.w_symbol);
+        else
+            (*c->c_symbolmethod)(x, &s_);
+        return;
+    }
+    for (i = c->c_nmethod, m = c->c_methods; i--; m++)
+        if (m->me_name == s)
+    {
+        wp = m->me_arg;
+        if (*wp == A_GIMME)
+        {
+            if (x == &pd_objectmaker)
+                newest = (*((t_newgimme)(m->me_fun)))(s, argc, argv);
+            else (*((t_messgimme)(m->me_fun)))(x, s, argc, argv);
+            return;
+        }
+        if (argc > MAXPDARG) argc = MAXPDARG;
+        if (x != &pd_objectmaker) *(ap++) = (t_int)x, narg++;
+        while (wanttype = *wp++)
+        {
+            switch (wanttype)
+            {
+            case A_POINTER:
+                if (!argc) goto badarg;
+                else
+                {
+                    if (argv->a_type == A_POINTER)
+                        *ap = (t_int)(argv->a_w.w_gpointer);
+                    else goto badarg;
+                    argc--;
+                    argv++;
+                }
+                narg++;
+                ap++;
+                break;
+            case A_FLOAT:
+                if (!argc) goto badarg;
+            case A_DEFFLOAT:
+                if (!argc) *dp = 0;
+                else
+                {
+                    if (argv->a_type == A_FLOAT)
+                        *dp = argv->a_w.w_float;
+                    else goto badarg;
+                    argc--;
+                    argv++;
+                }
+                dp++;
+                break;
+            case A_SYMBOL:
+                if (!argc) goto badarg;
+            case A_DEFSYM:
+                if (!argc) *ap = (t_int)(&s_);
+                else
+                {
+                    if (argv->a_type == A_SYMBOL)
+                        *ap = (t_int)(argv->a_w.w_symbol);
+                            /* if it's an unfilled "dollar" argument it appears
+                            as zero here; cheat and bash it to the null
+                            symbol.  Unfortunately, this lets real zeros
+                            pass as symbols too, which seems wrong... */
+                    else if (x == &pd_objectmaker && argv->a_type == A_FLOAT
+                        && argv->a_w.w_float == 0)
+                        *ap = (t_int)(&s_);
+                    else goto badarg;
+                    argc--;
+                    argv++;
+                }
+                narg++;
+                ap++;
+            }
+        }
+        switch (narg)
+        {
+        case 0 : bonzo = (*(t_fun0)(m->me_fun))
+            (ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 1 : bonzo = (*(t_fun1)(m->me_fun))
+            (ai[0], ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 2 : bonzo = (*(t_fun2)(m->me_fun))
+            (ai[0], ai[1], ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 3 : bonzo = (*(t_fun3)(m->me_fun))
+            (ai[0], ai[1], ai[2], ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 4 : bonzo = (*(t_fun4)(m->me_fun))
+            (ai[0], ai[1], ai[2], ai[3],
+                ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 5 : bonzo = (*(t_fun5)(m->me_fun))
+            (ai[0], ai[1], ai[2], ai[3], ai[4],
+                ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        case 6 : bonzo = (*(t_fun6)(m->me_fun))
+            (ai[0], ai[1], ai[2], ai[3], ai[4], ai[5],
+                ad[0], ad[1], ad[2], ad[3], ad[4]); break;
+        default: bonzo = 0;
+        }
+        if (x == &pd_objectmaker)
+            newest = bonzo;
+        return;
+    }
+    (*c->c_anymethod)(x, s, argc, argv);
+    return;
+badarg:
+    pd_error(x, "Bad arguments for message '%s' to object '%s'",
+        s->s_name, c->c_name->s_name);
+}
+
+void pd_vmess(t_pd *x, t_symbol *sel, char *fmt, ...)
+{
+    va_list ap;
+    t_atom arg[MAXPDARG], *at =arg;
+    int nargs = 0;
+    char *fp = fmt;
+
+    va_start(ap, fmt);
+    while (1)
+    {
+        if (nargs > MAXPDARG)
+        {
+            pd_error(x, "pd_vmess: only %d allowed", MAXPDARG);
+            break;
+        }
+        switch(*fp++)
+        {
+        case 'f': SETFLOAT(at, va_arg(ap, double)); break;
+        case 's': SETSYMBOL(at, va_arg(ap, t_symbol *)); break;
+        case 'i': SETFLOAT(at, va_arg(ap, t_int)); break;       
+        case 'p': SETPOINTER(at, va_arg(ap, t_gpointer *)); break;
+        default: goto done;
+        }
+        at++;
+        nargs++;
+    }
+done:
+    va_end(ap);
+    typedmess(x, sel, nargs, arg);
+}
+
+void pd_forwardmess(t_pd *x, int argc, t_atom *argv)
+{
+    if (argc)
+    {
+        t_atomtype t = argv->a_type;
+        if (t == A_SYMBOL) pd_typedmess(x, argv->a_w.w_symbol, argc-1, argv+1);
+        else if (t == A_POINTER)
+        {
+            if (argc == 1) pd_pointer(x, argv->a_w.w_gpointer);
+            else pd_list(x, &s_list, argc, argv);
+        }
+        else if (t == A_FLOAT)
+        {
+            if (argc == 1) pd_float(x, argv->a_w.w_float);
+            else pd_list(x, &s_list, argc, argv);
+        }
+        else bug("pd_forwardmess");
+    }
+
+}
+
+void nullfn(void) {}
+
+t_gotfn getfn(t_pd *x, t_symbol *s)
+{
+    t_class *c = *x;
+    t_methodentry *m;
+    int i;
+
+    for (i = c->c_nmethod, m = c->c_methods; i--; m++)
+        if (m->me_name == s) return(m->me_fun);
+    pd_error(x, "%s: no method for message '%s'", c->c_name->s_name, s->s_name);
+    return((t_gotfn)nullfn);
+}
+
+t_gotfn zgetfn(t_pd *x, t_symbol *s)
+{
+    t_class *c = *x;
+    t_methodentry *m;
+    int i;
+
+    for (i = c->c_nmethod, m = c->c_methods; i--; m++)
+        if (m->me_name == s) return(m->me_fun);
+    return(0);
+}