XQueryDv.c revision f1ee322d 
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 * XQueryDeviceState - Query the state of an extension input device.
50 *
51 */
52#ifdef HAVE_CONFIG_H
53#include <config.h>
54#endif
55
56#include <X11/extensions/XI.h>
57#include <X11/extensions/XIproto.h>
58#include <X11/Xlibint.h>
59#include <X11/extensions/XInput.h>
60#include <X11/extensions/extutil.h>
61#include "XIint.h"
62
63XDeviceState *
64XQueryDeviceState(
65    register Display	*dpy,
66    XDevice		*dev)
67{
68    int i, j;
69    int rlen;
70    int size = 0;
71    xQueryDeviceStateReq *req;
72    xQueryDeviceStateReply rep;
73    XDeviceState *state = NULL;
74    XInputClass *any, *Any;
75    char *data = NULL;
76    XExtDisplayInfo *info = XInput_find_display(dpy);
77
78    LockDisplay(dpy);
79    if (_XiCheckExtInit(dpy, XInput_Initial_Release, info) == -1)
80	return ((XDeviceState *) NoSuchExtension);
81
82    GetReq(QueryDeviceState, req);
83    req->reqType = info->codes->major_opcode;
84    req->ReqType = X_QueryDeviceState;
85    req->deviceid = dev->device_id;
86
87    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse))
88        goto out;
89
90    rlen = rep.length << 2;
91    if (rlen > 0) {
92	data = Xmalloc(rlen);
93	if (!data) {
94	    _XEatData(dpy, (unsigned long)rlen);
95	    goto out;
96	}
97	_XRead(dpy, data, rlen);
98
99	for (i = 0, any = (XInputClass *) data; i < (int)rep.num_classes; i++) {
100	    switch (any->class) {
101	    case KeyClass:
102		size += sizeof(XKeyState);
103		break;
104	    case ButtonClass:
105		size += sizeof(XButtonState);
106		break;
107	    case ValuatorClass:
108	    {
109		xValuatorState *v = (xValuatorState *) any;
110		size += (sizeof(XValuatorState) +
111			 (v->num_valuators * sizeof(int)));
112	    }
113		break;
114	    }
115	    any = (XInputClass *) ((char *)any + any->length);
116	}
117	state = (XDeviceState *) Xmalloc(size + sizeof(XDeviceState));
118	if (!state)
119            goto out;
120
121	state->device_id = dev->device_id;
122	state->num_classes = rep.num_classes;
123	state->data = (XInputClass *) (state + 1);
124
125	Any = state->data;
126	for (i = 0, any = (XInputClass *) data; i < (int)rep.num_classes; i++) {
127	    switch (any->class) {
128	    case KeyClass:
129	    {
130		xKeyState *k = (xKeyState *) any;
131		XKeyState *K = (XKeyState *) Any;
132
133		K->class = k->class;
134		K->length = sizeof(XKeyState);
135		K->num_keys = k->num_keys;
136		memcpy((char *)&K->keys[0], (char *)&k->keys[0], 32);
137		Any = (XInputClass *) (K + 1);
138	    }
139		break;
140	    case ButtonClass:
141	    {
142		xButtonState *b = (xButtonState *) any;
143		XButtonState *B = (XButtonState *) Any;
144
145		B->class = b->class;
146		B->length = sizeof(XButtonState);
147		B->num_buttons = b->num_buttons;
148		memcpy((char *)&B->buttons[0], (char *)&b->buttons[0], 32);
149		Any = (XInputClass *) (B + 1);
150	    }
151		break;
152	    case ValuatorClass:
153	    {
154		xValuatorState *v = (xValuatorState *) any;
155		XValuatorState *V = (XValuatorState *) Any;
156		CARD32 *valuators = (CARD32 *) (v + 1);
157
158		V->class = v->class;
159		V->length = sizeof(XValuatorState) +
160			    v->num_valuators * sizeof(int);
161		V->num_valuators = v->num_valuators;
162		V->mode = v->mode;
163		Any = (XInputClass *) (V + 1);
164		V->valuators = (int *)Any;
165		for (j = 0; j < (int)V->num_valuators; j++)
166		    *(V->valuators + j) = *valuators++;
167		Any = (XInputClass *) ((char *)Any +
168				       V->num_valuators * sizeof(int));
169	    }
170		break;
171	    }
172	    any = (XInputClass *) ((char *)any + any->length);
173	}
174    }
175out:
176    Xfree(data);
177
178    UnlockDisplay(dpy);
179    SyncHandle();
180    return (state);
181}
182
183void
184XFreeDeviceState(XDeviceState *list)
185{
186    XFree((char *)list);
187}
188