XGetFCtl.c revision 10baa824 
1/************************************************************
2
3Copyright 1989, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
26
27			All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Hewlett-Packard not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45********************************************************/
46
47/***********************************************************************
48 *
49 * XGetFeedbackControl - get the feedback attributes of an extension device.
50 *
51 */
52
53#ifdef HAVE_CONFIG_H
54#include <config.h>
55#endif
56
57#include <X11/extensions/XI.h>
58#include <X11/extensions/XIproto.h>
59#include <X11/Xlibint.h>
60#include <X11/Xlib.h>
61#include <X11/extensions/XInput.h>
62#include <X11/extensions/extutil.h>
63#include "XIint.h"
64#include <limits.h>
65
66XFeedbackState *
67XGetFeedbackControl(
68    register Display	*dpy,
69    XDevice		*dev,
70    int			*num_feedbacks)
71{
72    XFeedbackState *Feedback = NULL;
73    XFeedbackState *Sav = NULL;
74    xFeedbackState *f = NULL;
75    xFeedbackState *sav = NULL;
76    xGetFeedbackControlReq *req;
77    xGetFeedbackControlReply rep;
78    XExtDisplayInfo *info = XInput_find_display(dpy);
79
80    LockDisplay(dpy);
81    if (_XiCheckExtInit(dpy, XInput_Initial_Release, info) == -1)
82	return ((XFeedbackState *) NoSuchExtension);
83
84    GetReq(GetFeedbackControl, req);
85    req->reqType = info->codes->major_opcode;
86    req->ReqType = X_GetFeedbackControl;
87    req->deviceid = dev->device_id;
88
89    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse))
90	goto out;
91
92    if (rep.length > 0) {
93	unsigned long nbytes;
94	size_t size = 0;
95	int i;
96
97	*num_feedbacks = rep.num_feedbacks;
98
99	if (rep.length < (INT_MAX >> 2)) {
100	    nbytes = rep.length << 2;
101	    f = Xmalloc(nbytes);
102	}
103	if (!f) {
104	    _XEatDataWords(dpy, rep.length);
105	    goto out;
106	}
107	sav = f;
108	_XRead(dpy, (char *)f, nbytes);
109
110	for (i = 0; i < *num_feedbacks; i++) {
111	    if (f->length > nbytes)
112		goto out;
113	    nbytes -= f->length;
114
115	    switch (f->class) {
116	    case KbdFeedbackClass:
117		size += sizeof(XKbdFeedbackState);
118		break;
119	    case PtrFeedbackClass:
120		size += sizeof(XPtrFeedbackState);
121		break;
122	    case IntegerFeedbackClass:
123		size += sizeof(XIntegerFeedbackState);
124		break;
125	    case StringFeedbackClass:
126	    {
127		xStringFeedbackState *strf = (xStringFeedbackState *) f;
128		size += sizeof(XStringFeedbackState) +
129		    (strf->num_syms_supported * sizeof(KeySym));
130	    }
131		break;
132	    case LedFeedbackClass:
133		size += sizeof(XLedFeedbackState);
134		break;
135	    case BellFeedbackClass:
136		size += sizeof(XBellFeedbackState);
137		break;
138	    default:
139		size += f->length;
140		break;
141	    }
142	    if (size > INT_MAX)
143		goto out;
144	    f = (xFeedbackState *) ((char *)f + f->length);
145	}
146
147	Feedback = Xmalloc(size);
148	if (!Feedback)
149	    goto out;
150
151	Sav = Feedback;
152
153	f = sav;
154	for (i = 0; i < *num_feedbacks; i++) {
155	    switch (f->class) {
156	    case KbdFeedbackClass:
157	    {
158		xKbdFeedbackState *k;
159		XKbdFeedbackState *K;
160
161		k = (xKbdFeedbackState *) f;
162		K = (XKbdFeedbackState *) Feedback;
163
164		K->class = k->class;
165		K->length = sizeof(XKbdFeedbackState);
166		K->id = k->id;
167		K->click = k->click;
168		K->percent = k->percent;
169		K->pitch = k->pitch;
170		K->duration = k->duration;
171		K->led_mask = k->led_mask;
172		K->global_auto_repeat = k->global_auto_repeat;
173		memcpy((char *)&K->auto_repeats[0],
174		       (char *)&k->auto_repeats[0], 32);
175		break;
176	    }
177	    case PtrFeedbackClass:
178	    {
179		xPtrFeedbackState *p;
180		XPtrFeedbackState *P;
181
182		p = (xPtrFeedbackState *) f;
183		P = (XPtrFeedbackState *) Feedback;
184
185		P->class = p->class;
186		P->length = sizeof(XPtrFeedbackState);
187		P->id = p->id;
188		P->accelNum = p->accelNum;
189		P->accelDenom = p->accelDenom;
190		P->threshold = p->threshold;
191		break;
192	    }
193	    case IntegerFeedbackClass:
194	    {
195		xIntegerFeedbackState *ifs;
196		XIntegerFeedbackState *I;
197
198		ifs = (xIntegerFeedbackState *) f;
199		I = (XIntegerFeedbackState *) Feedback;
200
201		I->class = ifs->class;
202		I->length = sizeof(XIntegerFeedbackState);
203		I->id = ifs->id;
204		I->resolution = ifs->resolution;
205		I->minVal = ifs->min_value;
206		I->maxVal = ifs->max_value;
207		break;
208	    }
209	    case StringFeedbackClass:
210	    {
211		xStringFeedbackState *s;
212		XStringFeedbackState *S;
213
214		s = (xStringFeedbackState *) f;
215		S = (XStringFeedbackState *) Feedback;
216
217		S->class = s->class;
218		S->length = sizeof(XStringFeedbackState) +
219		    (s->num_syms_supported * sizeof(KeySym));
220		S->id = s->id;
221		S->max_symbols = s->max_symbols;
222		S->num_syms_supported = s->num_syms_supported;
223		S->syms_supported = (KeySym *) (S + 1);
224		memcpy((char *)S->syms_supported, (char *)(s + 1),
225		       (S->num_syms_supported * sizeof(KeySym)));
226		break;
227	    }
228	    case LedFeedbackClass:
229	    {
230		xLedFeedbackState *l;
231		XLedFeedbackState *L;
232
233		l = (xLedFeedbackState *) f;
234		L = (XLedFeedbackState *) Feedback;
235
236		L->class = l->class;
237		L->length = sizeof(XLedFeedbackState);
238		L->id = l->id;
239		L->led_values = l->led_values;
240		L->led_mask = l->led_mask;
241		break;
242	    }
243	    case BellFeedbackClass:
244	    {
245		xBellFeedbackState *b;
246		XBellFeedbackState *B;
247
248		b = (xBellFeedbackState *) f;
249		B = (XBellFeedbackState *) Feedback;
250
251		B->class = b->class;
252		B->length = sizeof(XBellFeedbackState);
253		B->id = b->id;
254		B->percent = b->percent;
255		B->pitch = b->pitch;
256		B->duration = b->duration;
257		break;
258	    }
259	    default:
260		break;
261	    }
262	    f = (xFeedbackState *) ((char *)f + f->length);
263	    Feedback = (XFeedbackState *) ((char *)Feedback + Feedback->length);
264	}
265    }
266out:
267    XFree((char *)sav);
268
269    UnlockDisplay(dpy);
270    SyncHandle();
271    return (Sav);
272}
273
274void
275XFreeFeedbackList(XFeedbackState *list)
276{
277    XFree((char *)list);
278}
279