1 /************************************************************
2
3 Copyright 1989, 1998 The Open Group
4
5 Permission to use, copy, modify, distribute, and sell this software and its
6 documentation for any purpose is hereby granted without fee, provided that
7 the above copyright notice appear in all copies and that both that
8 copyright notice and this permission notice appear in supporting
9 documentation.
10
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21 Except as contained in this notice, the name of The Open Group shall not be
22 used in advertising or otherwise to promote the sale, use or other dealings
23 in this Software without prior written authorization from The Open Group.
24
25 Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
26
27 All Rights Reserved
28
29 Permission to use, copy, modify, and distribute this software and its
30 documentation for any purpose and without fee is hereby granted,
31 provided that the above copyright notice appear in all copies and that
32 both that copyright notice and this permission notice appear in
33 supporting documentation, and that the name of Hewlett-Packard not be
34 used in advertising or publicity pertaining to distribution of the
35 software without specific, written prior permission.
36
37 HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39 HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43 SOFTWARE.
44
45 ********************************************************/
46
47 /***********************************************************************
48 *
49 * XGetDeviceControl - get the Device control state 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
66 XDeviceControl *
XGetDeviceControl(register Display * dpy,XDevice * dev,int control)67 XGetDeviceControl(
68 register Display *dpy,
69 XDevice *dev,
70 int control)
71 {
72 XDeviceControl *Device = NULL;
73 XDeviceControl *Sav = NULL;
74 xDeviceState *d = NULL;
75 xDeviceState *sav = NULL;
76 xGetDeviceControlReq *req;
77 xGetDeviceControlReply rep;
78 XExtDisplayInfo *info = XInput_find_display(dpy);
79
80 LockDisplay(dpy);
81 if (_XiCheckExtInit(dpy, XInput_Add_XChangeDeviceControl, info) == -1)
82 return NULL;
83
84 GetReq(GetDeviceControl, req);
85 req->reqType = info->codes->major_opcode;
86 req->ReqType = X_GetDeviceControl;
87 req->deviceid = dev->device_id;
88 req->control = control;
89
90 if (!_XReply(dpy, (xReply *) & rep, 0, xFalse))
91 goto out;
92
93 if (rep.length > 0) {
94 unsigned long nbytes;
95 size_t size = 0;
96 if (rep.length < (INT_MAX >> 2) &&
97 (rep.length << 2) >= sizeof(xDeviceState)) {
98 nbytes = (unsigned long) rep.length << 2;
99 d = Xmalloc(nbytes);
100 }
101 if (!d) {
102 _XEatDataWords(dpy, rep.length);
103 goto out;
104 }
105 sav = d;
106 _XRead(dpy, (char *)d, nbytes);
107
108 /* In theory, we should just be able to use d->length to get the size.
109 * Turns out that a number of X servers (up to and including server
110 * 1.4) sent the wrong length value down the wire. So to not break
111 * apps that run against older servers, we have to calculate the size
112 * manually.
113 */
114 switch (d->control) {
115 case DEVICE_RESOLUTION:
116 {
117 xDeviceResolutionState *r;
118 size_t val_size;
119
120 r = (xDeviceResolutionState *) d;
121 if (sizeof(xDeviceResolutionState) > nbytes ||
122 r->num_valuators >= (INT_MAX / (3 * sizeof(int))))
123 goto out;
124 val_size = 3 * sizeof(int) * r->num_valuators;
125 if ((sizeof(xDeviceResolutionState) + val_size) > nbytes)
126 goto out;
127 size = sizeof(XDeviceResolutionState) + val_size;
128 break;
129 }
130 case DEVICE_ABS_CALIB:
131 {
132 if (sizeof(xDeviceAbsCalibState) > nbytes)
133 goto out;
134 size = sizeof(XDeviceAbsCalibState);
135 break;
136 }
137 case DEVICE_ABS_AREA:
138 {
139 if (sizeof(xDeviceAbsAreaState) > nbytes)
140 goto out;
141 size = sizeof(XDeviceAbsAreaState);
142 break;
143 }
144 case DEVICE_CORE:
145 {
146 if (sizeof(xDeviceCoreState) > nbytes)
147 goto out;
148 size = sizeof(XDeviceCoreState);
149 break;
150 }
151 default:
152 if (d->length > nbytes)
153 goto out;
154 size = d->length;
155 break;
156 }
157
158 Device = Xmalloc(size);
159 if (!Device)
160 goto out;
161
162 Sav = Device;
163
164 d = sav;
165 switch (control) {
166 case DEVICE_RESOLUTION:
167 {
168 int *iptr, *iptr2;
169 xDeviceResolutionState *r;
170 XDeviceResolutionState *R;
171 unsigned int i;
172
173 r = (xDeviceResolutionState *) d;
174 R = (XDeviceResolutionState *) Device;
175
176 R->control = DEVICE_RESOLUTION;
177 R->length = sizeof(XDeviceResolutionState);
178 R->num_valuators = r->num_valuators;
179 iptr = (int *)(R + 1);
180 iptr2 = (int *)(r + 1);
181 R->resolutions = iptr;
182 R->min_resolutions = iptr + R->num_valuators;
183 R->max_resolutions = iptr + (2 * R->num_valuators);
184 for (i = 0; i < (3 * R->num_valuators); i++)
185 *iptr++ = *iptr2++;
186 break;
187 }
188 case DEVICE_ABS_CALIB:
189 {
190 xDeviceAbsCalibState *c = (xDeviceAbsCalibState *) d;
191 XDeviceAbsCalibState *C = (XDeviceAbsCalibState *) Device;
192
193 C->control = DEVICE_ABS_CALIB;
194 C->length = sizeof(XDeviceAbsCalibState);
195 C->min_x = c->min_x;
196 C->max_x = c->max_x;
197 C->min_y = c->min_y;
198 C->max_y = c->max_y;
199 C->flip_x = c->flip_x;
200 C->flip_y = c->flip_y;
201 C->rotation = c->rotation;
202 C->button_threshold = c->button_threshold;
203
204 break;
205 }
206 case DEVICE_ABS_AREA:
207 {
208 xDeviceAbsAreaState *a = (xDeviceAbsAreaState *) d;
209 XDeviceAbsAreaState *A = (XDeviceAbsAreaState *) Device;
210
211 A->control = DEVICE_ABS_AREA;
212 A->length = sizeof(XDeviceAbsAreaState);
213 A->offset_x = a->offset_x;
214 A->offset_y = a->offset_y;
215 A->width = a->width;
216 A->height = a->height;
217 A->screen = a->screen;
218 A->following = a->following;
219
220 break;
221 }
222 case DEVICE_CORE:
223 {
224 xDeviceCoreState *c = (xDeviceCoreState *) d;
225 XDeviceCoreState *C = (XDeviceCoreState *) Device;
226
227 C->control = DEVICE_CORE;
228 C->length = sizeof(XDeviceCoreState);
229 C->status = c->status;
230 C->iscore = c->iscore;
231
232 break;
233 }
234 case DEVICE_ENABLE:
235 {
236 xDeviceEnableState *e = (xDeviceEnableState *) d;
237 XDeviceEnableState *E = (XDeviceEnableState *) Device;
238
239 E->control = DEVICE_ENABLE;
240 E->length = sizeof(E);
241 E->enable = e->enable;
242
243 break;
244 }
245 default:
246 break;
247 }
248 }
249 out:
250 XFree(sav);
251
252 UnlockDisplay(dpy);
253 SyncHandle();
254 return (Sav);
255 }
256
257 void
XFreeDeviceControl(XDeviceControl * control)258 XFreeDeviceControl(XDeviceControl *control)
259 {
260 XFree(control);
261 }
262