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/* Copyright (c) 2002-2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include <string.h>
#include "m_pd.h"
#include "common/loud.h"
#include "common/grow.h"
#define APPEND_INISIZE 32 /* LATER rethink */
#define APPEND_MAXSIZE 256
typedef struct _append
{
t_object x_ob;
int x_size; /* as allocated */
int x_natoms; /* as used */
t_atom *x_message;
t_atom *x_messbuf;
t_atom x_messini[APPEND_INISIZE];
int x_entered;
int x_auxsize;
t_atom *x_auxbuf;
} t_append;
static t_class *append_class;
/* Usually a preallocation method is used, except in special cases of:
1) reentrant output request, or 2) an output request which would cause
resizing to more than MAXSIZE (no such limit for a 'set' message).
In both special cases, a temporary output buffer is allocated.
A separately preallocated output buffer is not used, thus avoiding
memcpying of the stored message (a small performance gain when the
preallocation method is chosen). Instead, self-invoked 'set'
messages are postponed, using an auxiliary buffer.
*/
/* Any Append's output goes through outlet_anything() -> typedmess() */
static void append_setnatoms(t_append *x, int natoms)
{
x->x_message = x->x_messbuf + x->x_size - natoms;
x->x_natoms = natoms;
}
static void append_anything(t_append *x, t_symbol *s, int ac, t_atom *av)
{
int reentered = x->x_entered;
int prealloc = !reentered;
int ntotal = x->x_natoms + ac;
t_atom *buf;
x->x_entered = 1;
if (prealloc && ntotal > x->x_size)
{
if (ntotal > APPEND_MAXSIZE)
prealloc = 0;
else
{
int nrequested = ntotal;
x->x_messbuf = grow_withtail(&nrequested, &x->x_natoms,
(char **)&x->x_message,
&x->x_size, x->x_messbuf,
APPEND_INISIZE, x->x_messini,
sizeof(*x->x_message));
prealloc = (nrequested == ntotal);
}
}
if (prealloc)
{
buf = x->x_message - ac;
if (ac)
memcpy(buf, av, ac * sizeof(*buf));
outlet_anything(((t_object *)x)->ob_outlet, s, ntotal, buf);
}
else
{
/* LATER consider using the stack if ntotal <= MAXSTACK */
if (buf = getbytes(ntotal * sizeof(*buf)))
{
if (ac)
memcpy(buf, av, ac * sizeof(*buf));
if (x->x_natoms)
memcpy(buf + ac, x->x_message, x->x_natoms * sizeof(*buf));
outlet_anything(((t_object *)x)->ob_outlet, s, ntotal, buf);
freebytes(buf, ntotal * sizeof(*buf));
}
}
if (!reentered)
{
x->x_entered = 0;
if (x->x_auxbuf)
{
if (x->x_auxsize <= x->x_size)
{
append_setnatoms(x, x->x_auxsize / 2);
memcpy(x->x_message, x->x_auxbuf + x->x_natoms,
x->x_natoms * sizeof(*x->x_message));
freebytes(x->x_auxbuf, x->x_auxsize * sizeof(*x->x_auxbuf));
}
else
{
if (x->x_messbuf != x->x_messini)
freebytes(x->x_messbuf, x->x_size * sizeof(*x->x_messbuf));
x->x_size = x->x_auxsize;
x->x_messbuf = x->x_auxbuf;
append_setnatoms(x, x->x_auxsize / 2);
}
x->x_auxbuf = 0;
}
}
}
static void append_bang(t_append *x)
{
/* CHECKED: a nop */
}
static void append_float(t_append *x, t_float f)
{
t_atom at;
SETFLOAT(&at, f);
append_anything(x, &s_list, 1, &at); /* CHECKED: converted to list */
}
/* CHECKED: incompatible -- LATER consider converting to anything */
static void append_symbol(t_append *x, t_symbol *s)
{
t_atom at;
SETSYMBOL(&at, s);
append_anything(x, &s_symbol, 1, &at);
}
/* LATER gpointer */
static void append_set(t_append *x, t_symbol *s, int ac, t_atom *av)
{
int newsize = ac * 2;
if (newsize > 0)
{
if (x->x_entered)
{
if (x->x_auxbuf)
{
loud_warning((t_pd *)x, "\'set\' message overridden");
freebytes(x->x_auxbuf, x->x_auxsize * sizeof(*x->x_auxbuf));
x->x_auxsize = 0;
}
if (x->x_auxbuf = getbytes(newsize * sizeof(*x->x_auxbuf)))
{
memcpy(x->x_auxbuf + ac, av, ac * sizeof(*x->x_auxbuf));
x->x_auxsize = newsize;
}
}
else
{
t_atom *ap;
if (newsize > x->x_size)
{
int sz = newsize;
x->x_messbuf = grow_nodata(&sz, &x->x_size, x->x_messbuf,
APPEND_INISIZE, x->x_messini,
sizeof(*x->x_messbuf));
if (sz != newsize)
ac = sz / 2; /* LATER rethink */
}
append_setnatoms(x, ac);
ap = x->x_message;
while (ac--) *ap++ = *av++;
}
}
}
static void append_free(t_append *x)
{
if (x->x_messbuf != x->x_messini)
freebytes(x->x_messbuf, x->x_size * sizeof(*x->x_messbuf));
}
static void *append_new(t_symbol *s, int ac, t_atom *av)
{
t_append *x = (t_append *)pd_new(append_class);
x->x_size = APPEND_INISIZE;
x->x_natoms = 0;
x->x_messbuf = x->x_messini;
x->x_auxbuf = 0;
x->x_entered = 0;
outlet_new((t_object *)x, &s_anything);
append_setnatoms(x, 0);
append_set(x, 0, ac, av);
return (x);
}
void Append_setup(void)
{
append_class = class_new(gensym("Append"),
(t_newmethod)append_new,
(t_method)append_free,
sizeof(t_append), 0,
A_GIMME, 0);
class_addbang(append_class, append_bang);
class_addfloat(append_class, append_float);
class_addsymbol(append_class, append_symbol);
class_addlist(append_class, append_anything); /* LATER rethink */
class_addanything(append_class, append_anything);
class_addmethod(append_class, (t_method)append_set,
gensym("set"), A_GIMME, 0);
}
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