1/************************************************************
2
3Copyright 2008 Peter Hutterer
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
17AUTHOR 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 author 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 author.
24
25*/
26
27/***********************************************************************
28 * XChangeDeviceProperties - change an input device's properties.
29 */
30
31#ifdef HAVE_CONFIG_H
32#include <config.h>
33#endif
34
35#include <X11/Xlibint.h>
36#include <X11/extensions/XI.h>
37#include <X11/extensions/XIproto.h>
38#include <X11/extensions/XInput.h>
39#include <X11/extensions/extutil.h>
40#include "XIint.h"
41
42void
43XChangeDeviceProperty(Display* dpy, XDevice* dev,
44                      Atom property, Atom type,
45                      int format, int mode,
46                      _Xconst unsigned char *data, int nelements)
47{
48    xChangeDevicePropertyReq   *req;
49    int                         len;
50
51    XExtDisplayInfo *info = XInput_find_display(dpy);
52
53    LockDisplay(dpy);
54    if (_XiCheckExtInit(dpy, XInput_Initial_Release, info) == -1)
55	return;
56
57    GetReq(ChangeDeviceProperty, req);
58    req->reqType    = info->codes->major_opcode;
59    req->ReqType    = X_ChangeDeviceProperty;
60    req->deviceid   = dev->device_id;
61    req->property   = property;
62    req->type       = type;
63    req->mode       = mode;
64    if (nelements < 0) {
65	req->nUnits = 0;
66	req->format = 0; /* ask for garbage, get garbage */
67    } else {
68	req->nUnits = nelements;
69	req->format = format;
70    }
71
72    switch (req->format) {
73    case 8:
74	len = ((long)nelements + 3) >> 2;
75	if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) {
76	    SetReqLen(req, len, len);
77	    Data (dpy, (_Xconst char *)data, nelements);
78	} /* else force BadLength */
79	break;
80
81    case 16:
82	len = ((long)nelements + 1) >> 1;
83	if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) {
84	    SetReqLen(req, len, len);
85	    len = (long)nelements << 1;
86	    Data16 (dpy, (_Xconst short *) data, len);
87	} /* else force BadLength */
88	break;
89
90    case 32:
91	len = nelements;
92	if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) {
93	    SetReqLen(req, len, len);
94	    len = (long)nelements << 2;
95	    Data32 (dpy, (_Xconst long *) data, len);
96	} /* else force BadLength */
97	break;
98
99    default:
100	/* BadValue will be generated */ ;
101    }
102
103    UnlockDisplay(dpy);
104    SyncHandle();
105}
106
107