[PD-cvs] pd/src x_list.c,NONE,1.2.2.2
Tim Blechmann
timblech at users.sourceforge.net
Thu Aug 4 11:32:04 CEST 2005
Update of /cvsroot/pure-data/pd/src
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv12842
Added Files:
Tag: devel_0_39
x_list.c
Log Message:
importing x_list.c
--- NEW FILE: x_list.c ---
/* Copyright (c) 1997- Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include "m_pd.h"
/* #include <string.h> */
#include <alloca.h>
extern t_pd *newest;
#define HAVE_ALLOCA 1 /* LATER this should be set by configure script! */
#define LIST_NGETBYTE 100 /* bigger that this we use alloc, not alloca */
/* the "list" object family.
list append - append a list to another
list prepend - prepend a list to another
list split - first n elements to first outlet, rest to second outlet
list trim - trim off "list" selector
list length - output number of items in list
list nth - nth item in list, counting from zero
Not sure we need these:
list cat - build a list by accumulating elements
list foreach - spit out elements of a list one by one
list array - get items from a named array as a list
list reverse - permute elements of a list back to front
list pack - synonym for 'pack'
list unpack - synonym for 'unpack'
list first - output first n elements.
list last - output last n elements
*/
/* -------------- utility functions: storage, copying -------------- */
/* List element for storage. Keep an atom and, in case it's a pointer,
an associated 'gpointer' to protect against stale pointers. */
typedef struct _listelem
{
t_atom l_a;
t_gpointer l_p;
} t_listelem;
typedef struct _alist
{
t_pd l_pd; /* object to point inlets to */
int l_n; /* number of items */
t_listelem *l_vec; /* pointer to items */
} t_alist;
#if 0 /* probably won't use this version... */
#ifdef HAVE_ALLOCA
#define LIST_ALLOCA(x, n) ( \
(x).l_n = (n), \
(x).l_vec = (t_listelem *)((n) < LIST_NGETBYTE ? \
alloca((n) * sizeof(t_listelem)) : getbytes((n) * sizeof(t_listelem)))) \
#define LIST_FREEA(x) ( \
((x).l_n < LIST_NGETBYTE ||
(freebytes((x).l_vec, (x).l_n * sizeof(t_listelem)), 0)))
#else
#define LIST_ALLOCA(x, n) ( \
(x).l_n = (n), \
(x).l_vec = (t_listelem *)getbytes((n) * sizeof(t_listelem)))
#define LIST_FREEA(x) (freebytes((x).l_vec, (x).l_n * sizeof(t_listelem)))
#endif
#endif
#if HAVE_ALLOCA
#define ATOMS_ALLOCA(x, n) ((x) = (t_atom *)((n) < LIST_NGETBYTE ? \
alloca((n) * sizeof(t_atom)) : getbytes((n) * sizeof(t_atom))))
#define ATOMS_FREEA(x, n) ( \
((n) < LIST_NGETBYTE || (freebytes((x), (n) * sizeof(t_atom)), 0)))
#else
#define ATOMS_ALLOCA(x, n) ((x) = (t_atom *)getbytes((n) * sizeof(t_atom)))
#define ATOMS_FREEA(x, n) (freebytes((x), (n) * sizeof(t_atom)))
#endif
static void atoms_copy(int argc, t_atom *from, t_atom *to)
{
int i;
for (i = 0; i < argc; i++)
to[i] = from[i];
}
/* ------------- fake class to divert inlets to ----------------- */
t_class *alist_class;
static void alist_init(t_alist *x)
{
x->l_pd = alist_class;
x->l_n = 0;
x->l_vec = 0;
}
static void alist_clear(t_alist *x)
{
int i;
for (i = 0; i < x->l_n; i++)
{
if (x->l_vec[i].l_a.a_type == A_POINTER)
gpointer_unset(x->l_vec[i].l_a.a_w.w_gpointer);
}
if (x->l_vec)
freebytes(x->l_vec, x->l_n * sizeof(*x->l_vec));
}
static void alist_list(t_alist *x, t_symbol *s, int argc, t_atom *argv)
{
int i;
alist_clear(x);
if (!(x->l_vec = (t_listelem *)getbytes(argc * sizeof(*x->l_vec))))
{
x->l_n = 0;
error("list_alloc: out of memory");
return;
}
x->l_n = argc;
for (i = 0; i < argc; i++)
{
x->l_vec[i].l_a = argv[i];
if (x->l_vec[i].l_a.a_type == A_POINTER)
gpointer_copy(x->l_vec[i].l_a.a_w.w_gpointer, &x->l_vec[i].l_p);
}
}
static void alist_anything(t_alist *x, t_symbol *s, int argc, t_atom *argv)
{
int i;
alist_clear(x);
if (!(x->l_vec = (t_listelem *)getbytes((argc+1) * sizeof(*x->l_vec))))
{
x->l_n = 0;
error("list_alloc: out of memory");
return;
}
x->l_n = argc+1;
SETSYMBOL(&x->l_vec[0].l_a, s);
for (i = 0; i < argc; i++)
{
x->l_vec[i+1].l_a = argv[i];
if (x->l_vec[i+1].l_a.a_type == A_POINTER)
gpointer_copy(x->l_vec[i+1].l_a.a_w.w_gpointer, &x->l_vec[i+1].l_p);
}
}
static void alist_toatoms(t_alist *x, t_atom *to)
{
int i;
for (i = 0; i < x->l_n; i++)
to[i] = x->l_vec[i].l_a;
}
static void alist_setup(void)
{
alist_class = class_new(gensym("list inlet"),
0, 0, sizeof(t_alist), 0, 0);
class_addlist(alist_class, alist_list);
class_addanything(alist_class, alist_anything);
}
/* ------------- list append --------------------- */
t_class *list_append_class;
typedef struct _list_append
{
t_object x_obj;
t_alist x_alist;
} t_list_append;
static void *list_append_new(t_symbol *s, int argc, t_atom *argv)
{
t_list_append *x = (t_list_append *)pd_new(list_append_class);
alist_init(&x->x_alist);
alist_list(&x->x_alist, 0, argc, argv);
outlet_new(&x->x_obj, &s_list);
inlet_new(&x->x_obj, &x->x_alist.l_pd, 0, 0);
return (x);
}
static void list_append_list(t_list_append *x, t_symbol *s,
int argc, t_atom *argv)
{
t_atom *outv;
int n, outc = x->x_alist.l_n + argc;
ATOMS_ALLOCA(outv, outc);
atoms_copy(argc, argv, outv);
alist_toatoms(&x->x_alist, outv+argc);
outlet_list(x->x_obj.ob_outlet, &s_list, outc, outv);
ATOMS_FREEA(outv, outc);
}
static void list_append_anything(t_list_append *x, t_symbol *s,
int argc, t_atom *argv)
{
t_atom *outv;
int n, outc = x->x_alist.l_n + argc + 1;
ATOMS_ALLOCA(outv, outc);
SETSYMBOL(outv, s);
atoms_copy(argc, argv, outv + 1);
alist_toatoms(&x->x_alist, outv + 1 + argc);
outlet_list(x->x_obj.ob_outlet, &s_list, outc, outv);
ATOMS_FREEA(outv, outc);
}
static void list_append_free(t_list_append *x)
{
alist_clear(&x->x_alist);
}
static void list_append_setup(void)
{
list_append_class = class_new(gensym("list append"),
(t_newmethod)list_append_new, (t_method)list_append_free,
sizeof(t_list_append), 0, A_GIMME, 0);
class_addlist(list_append_class, list_append_list);
class_addanything(list_append_class, list_append_anything);
class_sethelpsymbol(list_append_class, &s_list);
}
/* ------------- list prepend --------------------- */
t_class *list_prepend_class;
typedef struct _list_prepend
{
t_object x_obj;
t_alist x_alist;
} t_list_prepend;
static void *list_prepend_new(t_symbol *s, int argc, t_atom *argv)
{
t_list_prepend *x = (t_list_prepend *)pd_new(list_prepend_class);
alist_init(&x->x_alist);
alist_list(&x->x_alist, 0, argc, argv);
outlet_new(&x->x_obj, &s_list);
inlet_new(&x->x_obj, &x->x_alist.l_pd, 0, 0);
return (x);
}
static void list_prepend_list(t_list_prepend *x, t_symbol *s,
int argc, t_atom *argv)
{
t_atom *outv;
int n, outc = x->x_alist.l_n + argc;
ATOMS_ALLOCA(outv, outc);
alist_toatoms(&x->x_alist, outv);
atoms_copy(argc, argv, outv + x->x_alist.l_n);
outlet_list(x->x_obj.ob_outlet, &s_list, outc, outv);
ATOMS_FREEA(outv, outc);
}
static void list_prepend_anything(t_list_prepend *x, t_symbol *s,
int argc, t_atom *argv)
{
t_atom *outv;
int n, outc = x->x_alist.l_n + argc + 1;
ATOMS_ALLOCA(outv, outc);
alist_toatoms(&x->x_alist, outv);
SETSYMBOL(outv + x->x_alist.l_n, s);
atoms_copy(argc, argv, outv + x->x_alist.l_n + 1);
outlet_list(x->x_obj.ob_outlet, &s_list, outc, outv);
ATOMS_FREEA(outv, outc);
}
static void list_prepend_free(t_list_prepend *x)
{
alist_clear(&x->x_alist);
}
static void list_prepend_setup(void)
{
list_prepend_class = class_new(gensym("list prepend"),
(t_newmethod)list_prepend_new, (t_method)list_prepend_free,
sizeof(t_list_prepend), 0, A_GIMME, 0);
class_addlist(list_prepend_class, list_prepend_list);
class_addanything(list_prepend_class, list_prepend_anything);
class_sethelpsymbol(list_prepend_class, &s_list);
}
/* ------------- list split --------------------- */
t_class *list_split_class;
typedef struct _list_split
{
t_object x_obj;
t_float x_f;
t_outlet *x_out1;
t_outlet *x_out2;
t_outlet *x_out3;
} t_list_split;
static void *list_split_new(t_floatarg f)
{
t_list_split *x = (t_list_split *)pd_new(list_split_class);
x->x_out1 = outlet_new(&x->x_obj, &s_list);
x->x_out2 = outlet_new(&x->x_obj, &s_list);
x->x_out3 = outlet_new(&x->x_obj, &s_list);
floatinlet_new(&x->x_obj, &x->x_f);
x->x_f = f;
return (x);
}
static void list_split_list(t_list_split *x, t_symbol *s,
int argc, t_atom *argv)
{
int n = x->x_f;
if (n < 0)
n = 0;
if (argc >= n)
{
outlet_list(x->x_out2, &s_list, argc-n, argv+n);
outlet_list(x->x_out1, &s_list, n, argv);
}
else outlet_list(x->x_out3, &s_list, argc, argv);
}
static void list_split_anything(t_list_split *x, t_symbol *s,
int argc, t_atom *argv)
{
t_atom *outv;
ATOMS_ALLOCA(outv, argc+1);
SETSYMBOL(outv, s);
atoms_copy(argc, argv, outv + 1);
list_split_list(x, &s_list, argc+1, outv);
ATOMS_FREEA(outv, argc+1);
}
static void list_split_setup(void)
{
list_split_class = class_new(gensym("list split"),
(t_newmethod)list_split_new, 0,
sizeof(t_list_split), 0, A_DEFFLOAT, 0);
class_addlist(list_split_class, list_split_list);
class_addanything(list_split_class, list_split_anything);
class_sethelpsymbol(list_split_class, &s_list);
}
/* ------------- list trim --------------------- */
t_class *list_trim_class;
typedef struct _list_trim
{
t_object x_obj;
} t_list_trim;
static void *list_trim_new( void)
{
t_list_trim *x = (t_list_trim *)pd_new(list_trim_class);
outlet_new(&x->x_obj, &s_list);
return (x);
}
static void list_trim_list(t_list_trim *x, t_symbol *s,
int argc, t_atom *argv)
{
if (argc < 1 || argv[0].a_type != A_SYMBOL)
outlet_list(x->x_obj.ob_outlet, &s_list, argc, argv);
else outlet_anything(x->x_obj.ob_outlet, argv[0].a_w.w_symbol,
argc-1, argv+1);
}
static void list_trim_anything(t_list_trim *x, t_symbol *s,
int argc, t_atom *argv)
{
outlet_anything(x->x_obj.ob_outlet, s, argc, argv);
}
static void list_trim_setup(void)
{
list_trim_class = class_new(gensym("list trim"),
(t_newmethod)list_trim_new, 0,
sizeof(t_list_trim), 0, 0);
class_addlist(list_trim_class, list_trim_list);
class_addanything(list_trim_class, list_trim_anything);
class_sethelpsymbol(list_trim_class, &s_list);
}
/* ------------- list ------------------- */
static void *list_new(t_pd *dummy, t_symbol *s, int argc, t_atom *argv)
{
if (!argc || argv[0].a_type != A_SYMBOL)
newest = list_append_new(s, argc, argv);
else
{
t_symbol *s2 = argv[0].a_w.w_symbol;
if (s2 == gensym("append"))
newest = list_append_new(s, argc-1, argv+1);
else if (s2 == gensym("prepend"))
newest = list_prepend_new(s, argc-1, argv+1);
else if (s2 == gensym("split"))
newest = list_split_new(atom_getfloatarg(1, argc, argv));
else if (s2 == gensym("trim"))
newest = list_trim_new();
else
{
error("list %s: unknown function", s2->s_name);
newest = 0;
}
}
return (newest);
}
void x_list_setup(void)
{
alist_setup();
list_append_setup();
list_prepend_setup();
list_split_setup();
list_trim_setup();
class_addcreator((t_newmethod)list_new, &s_list, A_GIMME, 0);
}
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