aboutsummaryrefslogtreecommitdiff
path: root/pd/src/m_pd.c
blob: 8192c7e4b80aba14720a57d75070d50bb64c979e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/* 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.  */

#include <stdlib.h>
#include "m_pd.h"
#include "m_imp.h"

    /* FIXME no out-of-memory testing yet! */

t_pd *pd_new(t_class *c)
{
    t_pd *x;
    if (!c) 
    	bug ("pd_new: apparently called before setup routine");
    x = (t_pd *)t_getbytes(c->c_size);
    *x = c;
    if (c->c_patchable)
    {
	((t_object *)x)->ob_inlet = 0;
	((t_object *)x)->ob_outlet = 0;
    }
    return (x);
}

void pd_free(t_pd *x)
{
    t_class *c = *x;
    if (c->c_freemethod) (*(t_gotfn)(c->c_freemethod))(x);
    if (c->c_patchable)
    {
	while (((t_object *)x)->ob_outlet)
	    outlet_free(((t_object *)x)->ob_outlet);
	while (((t_object *)x)->ob_inlet)
	    inlet_free(((t_object *)x)->ob_inlet);
    	if (((t_object *)x)->ob_binbuf)
	    binbuf_free(((t_object *)x)->ob_binbuf);
    }
    if (c->c_size) t_freebytes(x, c->c_size);
}

/* deal with several objects bound to the same symbol.  If more than one, we
actually bind a collection object to the symbol, which forwards messages sent
to the symbol.  */

static t_class *bindlist_class;

typedef struct _bindelem
{
    t_pd *e_who;
    struct _bindelem *e_next;
} t_bindelem;

typedef struct _bindlist
{
    t_pd b_pd;
    t_bindelem *b_list;
} t_bindlist;

static void bindlist_bang(t_bindlist *x)
{
    t_bindelem *e;
    for (e = x->b_list; e; e = e->e_next)
    	pd_bang(e->e_who);
}

static void bindlist_float(t_bindlist *x, t_float f)
{
    t_bindelem *e;
    for (e = x->b_list; e; e = e->e_next)
    	pd_float(e->e_who, f);
}

static void bindlist_symbol(t_bindlist *x, t_symbol *s)
{
    t_bindelem *e;
    for (e = x->b_list; e; e = e->e_next)
    	pd_symbol(e->e_who, s);
}

static void bindlist_pointer(t_bindlist *x, t_gpointer *gp)
{
    t_bindelem *e;
    for (e = x->b_list; e; e = e->e_next)
    	pd_pointer(e->e_who, gp);
}

static void bindlist_list(t_bindlist *x, t_symbol *s,
    int argc, t_atom *argv)
{
    t_bindelem *e;
    for (e = x->b_list; e; e = e->e_next)
    	pd_list(e->e_who, s, argc, argv);
}

static void bindlist_anything(t_bindlist *x, t_symbol *s,
    int argc, t_atom *argv)
{
    t_bindelem *e;
    for (e = x->b_list; e; e = e->e_next)
    	pd_typedmess(e->e_who, s, argc, argv);
}

void m_pd_setup(void)
{
    bindlist_class = class_new(gensym("bindlist"), 0, 0,
    	sizeof(t_bindlist), CLASS_PD, 0);
    class_addbang(bindlist_class, bindlist_bang);
    class_addfloat(bindlist_class, (t_method)bindlist_float);
    class_addsymbol(bindlist_class, bindlist_symbol);
    class_addpointer(bindlist_class, bindlist_pointer);
    class_addlist(bindlist_class, bindlist_list);
    class_addanything(bindlist_class, bindlist_anything);
}

void pd_bind(t_pd *x, t_symbol *s)
{
    if (s->s_thing)
    {
    	if (*s->s_thing == bindlist_class)
    	{
    	    t_bindlist *b = (t_bindlist *)s->s_thing;
    	    t_bindelem *e = (t_bindelem *)getbytes(sizeof(t_bindelem));
    	    e->e_next = b->b_list;
    	    e->e_who = x;
    	    b->b_list = e;
    	}
    	else
    	{
    	    t_bindlist *b = (t_bindlist *)pd_new(bindlist_class);
    	    t_bindelem *e1 = (t_bindelem *)getbytes(sizeof(t_bindelem));
    	    t_bindelem *e2 = (t_bindelem *)getbytes(sizeof(t_bindelem));
    	    b->b_list = e1;
    	    e1->e_who = x;
    	    e1->e_next = e2;
    	    e2->e_who = s->s_thing;
    	    e2->e_next = 0;
    	    s->s_thing = &b->b_pd;
    	}
    }
    else s->s_thing = x;
}

void pd_unbind(t_pd *x, t_symbol *s)
{
    if (s->s_thing == x) s->s_thing = 0;
    else if (s->s_thing && *s->s_thing == bindlist_class)
    {
    	    /* bindlists always have at least two elements... if the number
    	    goes down to one, get rid of the bindlist and bind the symbol
    	    straight to the remaining element. */

    	t_bindlist *b = (t_bindlist *)s->s_thing;
    	t_bindelem *e, *e2;
    	if ((e = b->b_list)->e_who == x)
    	{
    	    b->b_list = e->e_next;
    	    freebytes(e, sizeof(t_bindelem));
    	}
    	else for (e = b->b_list; e2 = e->e_next; e = e2)
    	    if (e2->e_who == x)
    	{
    	    e->e_next = e2->e_next;
    	    freebytes(e2, sizeof(t_bindelem));
    	    break;
    	}
    	if (!b->b_list->e_next)
    	{
    	    s->s_thing = b->b_list->e_who;
    	    freebytes(b->b_list, sizeof(t_bindelem));
    	    pd_free(&b->b_pd);
    	}
    }
    else pd_error(x, "%s: couldn't unbind", s->s_name);
}

void zz(void) {}

t_pd *pd_findbyclass(t_symbol *s, t_class *c)
{
    t_pd *x = 0;
    
    if (!s->s_thing) return (0);
    if (*s->s_thing == c) return (s->s_thing);
    if (*s->s_thing == bindlist_class)
    {
    	t_bindlist *b = (t_bindlist *)s->s_thing;
    	t_bindelem *e, *e2;
    	int warned = 0;
    	for (e = b->b_list; e; e = e->e_next)
    	    if (*e->e_who == c)
    	{
    	    if (x && !warned)
    	    {
	    	zz();
    	    	post("warning: %s: multiply defined", s->s_name);
    	    	warned = 1;
    	    }
    	    x = e->e_who;
    	}
    }
    return x;
}

/* stack for maintaining bindings for the #X symbol during nestable loads.
*/

typedef struct _gstack
{
    t_pd *g_what;
    t_symbol *g_loadingabstraction;
    struct _gstack *g_next;
} t_gstack;

static t_gstack *gstack_head = 0;
static t_pd *lastpopped;
static t_symbol *pd_loadingabstraction;

int pd_setloadingabstraction(t_symbol *sym)
{
    t_gstack *foo = gstack_head;
    for (foo = gstack_head; foo; foo = foo->g_next)
    	if (foo->g_loadingabstraction == sym)
	    return (1);
    pd_loadingabstraction = sym;
    return (0);
}

void pd_pushsym(t_pd *x)
{
    t_gstack *y = (t_gstack *)t_getbytes(sizeof(*y));
    y->g_what = s__X.s_thing;
    y->g_next = gstack_head;
    y->g_loadingabstraction = pd_loadingabstraction;
    pd_loadingabstraction = 0;
    gstack_head = y;
    s__X.s_thing = x;
}

void pd_popsym(t_pd *x)
{
    if (!gstack_head || s__X.s_thing != x) bug("gstack_pop");
    else
    {
    	t_gstack *headwas = gstack_head;
    	s__X.s_thing = headwas->g_what;
    	gstack_head = headwas->g_next;
    	t_freebytes(headwas, sizeof(*headwas));
    	lastpopped = x;
    }
}

void pd_doloadbang(void)
{
    if (lastpopped)
    	pd_vmess(lastpopped, gensym("loadbang"), "");
    lastpopped = 0;
}

void pd_bang(t_pd *x)
{
    (*(*x)->c_bangmethod)(x);
}

void pd_float(t_pd *x, t_float f)
{
    (*(*x)->c_floatmethod)(x, f);
}

void pd_pointer(t_pd *x, t_gpointer *gp)
{
    (*(*x)->c_pointermethod)(x, gp);
}

void pd_symbol(t_pd *x, t_symbol *s)
{
    (*(*x)->c_symbolmethod)(x, s);
}

void pd_list(t_pd *x, t_symbol *s, int argc, t_atom *argv)
{
    (*(*x)->c_listmethod)(x, &s_list, argc, argv);
}

void mess_init(void);
void obj_init(void);
void conf_init(void);
void glob_init(void);

void pd_init(void)
{
    mess_init();
    obj_init();
    conf_init();
    glob_init();
}